Majorana equation: Difference between revisions

From formulasearchengine
Jump to navigation Jump to search
en>Giftlite
m mv .
 
No edit summary
Line 1: Line 1:
The author's name is Christy. Some time ago he selected to live in North Carolina and he doesn't plan on altering it. What me and my family adore is bungee leaping but I've been using on new issues lately. Invoicing is my occupation.<br><br>Also visit my website :: free psychic reading ([http://kpupf.com/xe/talk/735373 kpupf.com])
The '''error threshold''' is a concept in the study of [[evolutionary biology]] and  [[population genetics]] concerned with the origins of life ([[abiogenesis]]), in particular of very early life, before the advent of [[DNA]]. It is postulated that the first self-replicating molecules might have been small [[ribozyme]]-like [[RNA]] molecules. These molecules consist of strings of base pairs or "digits",  and their order is a code that directs how the molecule interacts with its environment. All replication is subject to mutation error. During the replication process, each digit has a certain probability of being replaced by some other digit, which changes the way the molecule interacts with its environment, and may increase or decrease its fitness, or ability to reproduce, in that environment.
 
It was noted by [[Manfred Eigen]] in his 1971 paper (Eigen 1971) that this mutation process places a limit on the number of digits a molecule may have. If a molecule exceeds this critical size, the effect of the mutations become overwhelming and a runaway mutation process will destroy the information in subsequent generations of the molecule. The error threshold is also controlled by the [[fitness landscape]] for the molecules. Molecules that differ only by a few mutations may be thought of as "close" to each other, while those that differ by many mutations are distant from each other. Molecules that are very fit, and likely to reproduce, have a "high" fitness, those less fit have "low" fitness. These ideas of proximity and height form the intuitive concept of the "fitness landscape". If a particular sequence and its neighbors have a high fitness, they will form a [[quasispecies model|quasispecies]] and will be able to support longer sequence lengths than a fit sequence with few fit neighbors, or a less fit neighborhood of sequences. Also, it was noted by Wilke (Wilke 2005) that the error threshold concept does not apply in portions of the  landscape where there are lethal mutations, in which the induced mutation yields zero fitness and prohibits the molecule from reproducing.
 
The concept of this critical mutation rate, or "error threshold" is crucial to understanding "Eigen's paradox," which is discussed in the next section.
 
==Eigen's Paradox==
 
'''Eigen's paradox'''  is one of the most intractable puzzles in the study of the origins of life. It is thought that the error threshold concept described above limits the size of self replicating molecules to perhaps a few hundred digits,  yet almost all life on earth requires  much longer molecules to encode their genetic information. This problem is handled in living cells by enzymes that repair mutations, allowing the encoding molecules to reach sizes on the order of millions of base pairs. These large molecules must, of course, encode the very enzymes that repair them, and herein lies Eigen's paradox, first put forth by [[Manfred Eigen]] in his 1971 paper (Eigen 1971). Simply stated, Eigen's paradox amounts to the following:
 
*  Without error correction enzymes, the maximum size of a replicating molecule is about 100 base pairs.
* For a replicating molecule to encode error correction enzymes, it must be substantially larger than 100 bases.
 
This is a [[The chicken or the egg|chicken-or-egg]] kind of a paradox, with an even more difficult solution. Which came first, the large genome or the error correction enzymes? A number of solutions to this paradox have been proposed:
 
* Stochastic corrector model (Szathmáry & Maynard Smith, 1995). In this proposed solution, a number of primitive molecules of say, two different types, are associated with each other in some way, perhaps by a capsule or "cell wall". If their reproductive success is enhanced by having, say, equal numbers in each cell, and reproduction occurs by division in which each of various types of molecules are randomly distributed among the "children", the process of selection will promote such equal representation in the cells, even though one of the molecules may have a selective advantage over the other.
 
* Relaxed error threshold (Kun et al., 2005) - Studies of actual ribozymes indicate that the mutation rate can be substantially less than first expected - on the order of 0.001 per base pair per replication. This may allow sequence lengths of the order of 7-8 thousand base pairs, sufficient to incorporate rudimentary error correction enzymes.
 
==A simple mathematical model illustrating the error threshold{{Citation needed|date=April 2012}}==
 
Consider a 3-digit molecule [A,B,C] where A, B, and C can take on the values 0 and 1. There are eight such sequences ([000], [001], [010], [011], [100], [101], [110], and [111]). Let's say that the [000] molecule is the most fit; upon each replication it produces an average of <math>a</math> copies, where <math>a>1</math>. This molecule is called the "master sequence". The other seven sequences are less fit; they each produce only 1 copy per replication. The replication of each of the three digits is done with a mutation rate of μ. In other words, at every replication of a digit of a sequence, there is a probability <math>\mu</math> that it will be erroneous; 0 will be replaced by 1 or vice versa. Let's ignore double mutations, and divide the eight molecules into three classes depending on their [[Hamming distance]] from the master sequence:
 
:{| class="wikitable"
|-
|'''Hamming<br>distance''' || '''Sequence(s)'''
|-
|align=center| 0
|align=center| [000]
|-
|align=center| 1
|align=center| [001]<br>[010]<br>[100]
|-
|align=center| 2
|align=center| [110]<br>[101]<br>[011]
|-
|align=center| 3
|align=center| [111]
|}
 
Note that the number of sequences for distance ''d'' is just the [[binomial coefficient]] <math>\tbinom L d </math> for L=3, and that each sequence can be visualized as the vertex of an L=3  dimensional cube,  with each edge of the cube specifying a mutation path in which the change Hamming distance is either zero or ±1. It can be seen that, for example, one third of the mutations of the [001] molecules will produce [000] molecules, while the other two thirds will produce the class 2 molecules [011] and [101]. We can now write the expression for the child populations <math>n'_i</math> of class ''i'' in terms of the parent populations <math>n_j</math>.
 
:<math>n'_i=\sum_{j=0}^3 w_{ij}n_j</math>
 
where the fitness matrix '''w''' is given by:
 
:<math>\mathbf{w}=
\begin{bmatrix}
(Q+a-1)&\frac{1}{3}m&0&0\\
m&Q&\frac{2}{3}m&0\\
0&\frac{2}{3}m&Q&m\\
0&0&\frac{1}{3}m&Q
\end{bmatrix}
</math>
 
where <math>Q=(1-\mu)^L</math> is the probability that an entire molecule will be replicated successfully. The [[eigenvectors]] of the '''w''' matrix will yield the equilibrium population numbers for each class. For example, if the mutation rate μ is zero, we will have Q=1, and the equilibrium concentrations will be <math>[n_0,n_1,n_2,n_3]=[1,0,0,0]</math>. The master sequence, being the fittest will be the only one to survive. If we have a replication fidelity of Q=0.95, then the equilibrium concentrations will be roughly <math>[0.35,0.37,0.22,0.055]</math>. It can be seen that the master sequence is not as dominant. If we have a replication fidelity of Q=0, then the equilibrium concentrations will be roughly <math>[0.131,0.376,0.371,0.123]</math>. This is almost an equal population of all sequences. (If we had perfectly equal population of all sequences, we would have populations of [1,3,3,1]/8.)
 
If we now go to the case where the number of base pairs is large, say L=100, we obtain behavior that resembles a phase transition. The plot below on the left shows a series of equilibrium concentrations divided by the binomial coefficient <math>\tbinom {100} k </math>.
(This multiplication will show the population for an individual sequence at that distance,  and will yield a flat line for an equal distribution.) The selective advantage of the master sequence is set at a=1.05.  The horizontal axis is the Hamming distance ''d''&nbsp;. The various curves are for various total  mutation rates <math>(1-Q)</math>. It is seen that for low values of the total mutation rate, the population consists of a [[quasispecies]] gathered in the neighborhood of the master sequence. Above a total mutation rate of about 1-Q=0.05, the distribution quickly spreads out to populate all sequences equally. The plot below on the right shows the fractional population of the master sequence as a function of the total mutation rate. Again it is seen that below a critical mutation rate of about 1-Q=0.05, the master sequence contains most of the population, while above this rate, it contains only about <math>2^{-L}\approx 10^{-30}</math> of the total population.
 
[[Image:ErrorThreshold1.png|thumb|left|325px|Population numbers as a function of Hamming distance ''d'' and mutation rate (1-Q). The horizontal axis ''d''&nbsp; is the Hamming distance of the molecular sequences from the master sequence. The vertical axis is the logarithm of population for any sequence at that distance divided by total population (thus the division of ''n<sub>d</sub>'' by the binomial coefficient). The total number of digits per sequence is L=100, and the master sequence has a selective advantage of a=1.05.]]
 
[[Image:ErrorThreshold2.png|thumb|right|325px|The population of the master sequence as a fraction of the total population (''n'') as a function of overall mutation rate (1-Q). The total number of digits per sequence is L=100, and the master sequence has a selective advantage of a=1.05. The "phase transition" is seen to occur at roughly 1-Q=0.05.]]
 
<br style="clear:both;" />
 
It can be seen that there is a sharp transition at a value of ''1-Q''&nbsp; just a bit larger than 0.05. For mutation rates above this value, the population of the master sequence drops to practically zero. Above this value, it dominates.
 
In the limit as ''L'' approaches infinity, the system does in fact have a phase transition at a critical value of Q: <math>Q_c=1/a.</math>. One could think of the overall mutation rate (1-Q) as a sort of "temperature", which "melts" the fidelity of the molecular sequences above the critical "temperature" of <math>1-Q_c</math>. For faithful replication to occur, the information must be "frozen" into the genome.
 
== References ==
 
* {{cite journal | author=Eigen, M. | title=Selforganization of matter and evolution of biological Macromolecules |  doi=10.1007/BF00623322 | journal=Naturwissenschaften | year=1971 | volume=58 | issue=10 | pages=465–523 | pmid=4942363 | bibcode=1971NW.....58..465E}}
* {{cite web | title=Quasispecies theory in the context of population genetics - Claus O. Wilke| work= | url=http://www.biomedcentral.com/content/pdf/1471-2148-5-44.pdf |format=PDF| accessdate=October 12, 2005 }}
* {{cite journal | author=Campos, P. R. A.  and Fontanari, J. F.  | title=Finite-size scaling of the error threshold transition in finite populations |url=http://www.iop.org/EJ/article/0305-4470/32/1/001/a901l1.pdf |format=PDF | journal=J. Phys. A: Math. Gen. | year=1999 | volume=32 | pages= L1–L7  | doi=10.1088/0305-4470/32/1/001|arxiv = cond-mat/9809209 |bibcode = 1999JPhA...32L...1C }}
* {{cite journal | author=Holmes, Edward C. | title=On being the right size |url=http://www.nature.com/ng/journal/v37/n9/pdf/ng0905-923.pdf |format=PDF | journal=Nature Genetics | year=2005 | volume=37 | pages=923–924 | doi=10.1038/ng0905-923 | pmid=16132047 | issue=9}}
* {{cite journal | author=Eörs Szathmáry & John Maynard Smith | title=The major evolutionary transitions | journal=Nature | year=1995 | volume=374 | pages=227–232 | doi=10.1038/374227a0 | pmid=7885442 | issue=6519|bibcode = 1995Natur.374..227S }}
* {{cite journal | author=Ádám Kun, Mauro Santos & Eörs Szathmáry | title= Real ribozymes suggest a relaxed error threshold |url=http://www.nature.com/ng/journal/v37/n9/pdf/ng1621.pdf |format=PDF | journal=Nature Genetics | year=2005 | volume=37 | pages=1008–1011 | pmid=16127452 | issue=9 | doi=10.1038/ng1621}}
 
{{Population genetics}}
 
[[Category:Virology]]
[[Category:Evolutionary biology]]
[[Category:Population genetics]]
[[Category:Microbial population biology]]

Revision as of 20:29, 18 July 2013

The error threshold is a concept in the study of evolutionary biology and population genetics concerned with the origins of life (abiogenesis), in particular of very early life, before the advent of DNA. It is postulated that the first self-replicating molecules might have been small ribozyme-like RNA molecules. These molecules consist of strings of base pairs or "digits", and their order is a code that directs how the molecule interacts with its environment. All replication is subject to mutation error. During the replication process, each digit has a certain probability of being replaced by some other digit, which changes the way the molecule interacts with its environment, and may increase or decrease its fitness, or ability to reproduce, in that environment.

It was noted by Manfred Eigen in his 1971 paper (Eigen 1971) that this mutation process places a limit on the number of digits a molecule may have. If a molecule exceeds this critical size, the effect of the mutations become overwhelming and a runaway mutation process will destroy the information in subsequent generations of the molecule. The error threshold is also controlled by the fitness landscape for the molecules. Molecules that differ only by a few mutations may be thought of as "close" to each other, while those that differ by many mutations are distant from each other. Molecules that are very fit, and likely to reproduce, have a "high" fitness, those less fit have "low" fitness. These ideas of proximity and height form the intuitive concept of the "fitness landscape". If a particular sequence and its neighbors have a high fitness, they will form a quasispecies and will be able to support longer sequence lengths than a fit sequence with few fit neighbors, or a less fit neighborhood of sequences. Also, it was noted by Wilke (Wilke 2005) that the error threshold concept does not apply in portions of the landscape where there are lethal mutations, in which the induced mutation yields zero fitness and prohibits the molecule from reproducing.

The concept of this critical mutation rate, or "error threshold" is crucial to understanding "Eigen's paradox," which is discussed in the next section.

Eigen's Paradox

Eigen's paradox is one of the most intractable puzzles in the study of the origins of life. It is thought that the error threshold concept described above limits the size of self replicating molecules to perhaps a few hundred digits, yet almost all life on earth requires much longer molecules to encode their genetic information. This problem is handled in living cells by enzymes that repair mutations, allowing the encoding molecules to reach sizes on the order of millions of base pairs. These large molecules must, of course, encode the very enzymes that repair them, and herein lies Eigen's paradox, first put forth by Manfred Eigen in his 1971 paper (Eigen 1971). Simply stated, Eigen's paradox amounts to the following:

  • Without error correction enzymes, the maximum size of a replicating molecule is about 100 base pairs.
  • For a replicating molecule to encode error correction enzymes, it must be substantially larger than 100 bases.

This is a chicken-or-egg kind of a paradox, with an even more difficult solution. Which came first, the large genome or the error correction enzymes? A number of solutions to this paradox have been proposed:

  • Stochastic corrector model (Szathmáry & Maynard Smith, 1995). In this proposed solution, a number of primitive molecules of say, two different types, are associated with each other in some way, perhaps by a capsule or "cell wall". If their reproductive success is enhanced by having, say, equal numbers in each cell, and reproduction occurs by division in which each of various types of molecules are randomly distributed among the "children", the process of selection will promote such equal representation in the cells, even though one of the molecules may have a selective advantage over the other.
  • Relaxed error threshold (Kun et al., 2005) - Studies of actual ribozymes indicate that the mutation rate can be substantially less than first expected - on the order of 0.001 per base pair per replication. This may allow sequence lengths of the order of 7-8 thousand base pairs, sufficient to incorporate rudimentary error correction enzymes.

A simple mathematical model illustrating the error thresholdPotter or Ceramic Artist Truman Bedell from Rexton, has interests which include ceramics, best property developers in singapore developers in singapore and scrabble. Was especially enthused after visiting Alejandro de Humboldt National Park.

Consider a 3-digit molecule [A,B,C] where A, B, and C can take on the values 0 and 1. There are eight such sequences ([000], [001], [010], [011], [100], [101], [110], and [111]). Let's say that the [000] molecule is the most fit; upon each replication it produces an average of copies, where . This molecule is called the "master sequence". The other seven sequences are less fit; they each produce only 1 copy per replication. The replication of each of the three digits is done with a mutation rate of μ. In other words, at every replication of a digit of a sequence, there is a probability that it will be erroneous; 0 will be replaced by 1 or vice versa. Let's ignore double mutations, and divide the eight molecules into three classes depending on their Hamming distance from the master sequence:

Hamming
distance
Sequence(s)
0 [000]
1 [001]
[010]
[100]
2 [110]
[101]
[011]
3 [111]

Note that the number of sequences for distance d is just the binomial coefficient for L=3, and that each sequence can be visualized as the vertex of an L=3 dimensional cube, with each edge of the cube specifying a mutation path in which the change Hamming distance is either zero or ±1. It can be seen that, for example, one third of the mutations of the [001] molecules will produce [000] molecules, while the other two thirds will produce the class 2 molecules [011] and [101]. We can now write the expression for the child populations of class i in terms of the parent populations .

where the fitness matrix w is given by:

where is the probability that an entire molecule will be replicated successfully. The eigenvectors of the w matrix will yield the equilibrium population numbers for each class. For example, if the mutation rate μ is zero, we will have Q=1, and the equilibrium concentrations will be . The master sequence, being the fittest will be the only one to survive. If we have a replication fidelity of Q=0.95, then the equilibrium concentrations will be roughly . It can be seen that the master sequence is not as dominant. If we have a replication fidelity of Q=0, then the equilibrium concentrations will be roughly . This is almost an equal population of all sequences. (If we had perfectly equal population of all sequences, we would have populations of [1,3,3,1]/8.)

If we now go to the case where the number of base pairs is large, say L=100, we obtain behavior that resembles a phase transition. The plot below on the left shows a series of equilibrium concentrations divided by the binomial coefficient . (This multiplication will show the population for an individual sequence at that distance, and will yield a flat line for an equal distribution.) The selective advantage of the master sequence is set at a=1.05. The horizontal axis is the Hamming distance d . The various curves are for various total mutation rates . It is seen that for low values of the total mutation rate, the population consists of a quasispecies gathered in the neighborhood of the master sequence. Above a total mutation rate of about 1-Q=0.05, the distribution quickly spreads out to populate all sequences equally. The plot below on the right shows the fractional population of the master sequence as a function of the total mutation rate. Again it is seen that below a critical mutation rate of about 1-Q=0.05, the master sequence contains most of the population, while above this rate, it contains only about of the total population.

Population numbers as a function of Hamming distance d and mutation rate (1-Q). The horizontal axis d  is the Hamming distance of the molecular sequences from the master sequence. The vertical axis is the logarithm of population for any sequence at that distance divided by total population (thus the division of nd by the binomial coefficient). The total number of digits per sequence is L=100, and the master sequence has a selective advantage of a=1.05.
The population of the master sequence as a fraction of the total population (n) as a function of overall mutation rate (1-Q). The total number of digits per sequence is L=100, and the master sequence has a selective advantage of a=1.05. The "phase transition" is seen to occur at roughly 1-Q=0.05.


It can be seen that there is a sharp transition at a value of 1-Q  just a bit larger than 0.05. For mutation rates above this value, the population of the master sequence drops to practically zero. Above this value, it dominates.

In the limit as L approaches infinity, the system does in fact have a phase transition at a critical value of Q: . One could think of the overall mutation rate (1-Q) as a sort of "temperature", which "melts" the fidelity of the molecular sequences above the critical "temperature" of . For faithful replication to occur, the information must be "frozen" into the genome.

References

  • One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting

    In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang

    Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules

    Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.

    A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running

    The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more

    There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang
  • Template:Cite web
  • One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting

    In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang

    Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules

    Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.

    A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running

    The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more

    There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang
  • One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting

    In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang

    Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules

    Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.

    A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running

    The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more

    There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang
  • One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting

    In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang

    Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules

    Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.

    A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running

    The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more

    There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang
  • One of the biggest reasons investing in a Singapore new launch is an effective things is as a result of it is doable to be lent massive quantities of money at very low interest rates that you should utilize to purchase it. Then, if property values continue to go up, then you'll get a really high return on funding (ROI). Simply make sure you purchase one of the higher properties, reminiscent of the ones at Fernvale the Riverbank or any Singapore landed property Get Earnings by means of Renting

    In its statement, the singapore property listing - website link, government claimed that the majority citizens buying their first residence won't be hurt by the new measures. Some concessions can even be prolonged to chose teams of consumers, similar to married couples with a minimum of one Singaporean partner who are purchasing their second property so long as they intend to promote their first residential property. Lower the LTV limit on housing loans granted by monetary establishments regulated by MAS from 70% to 60% for property purchasers who are individuals with a number of outstanding housing loans on the time of the brand new housing purchase. Singapore Property Measures - 30 August 2010 The most popular seek for the number of bedrooms in Singapore is 4, followed by 2 and three. Lush Acres EC @ Sengkang

    Discover out more about real estate funding in the area, together with info on international funding incentives and property possession. Many Singaporeans have been investing in property across the causeway in recent years, attracted by comparatively low prices. However, those who need to exit their investments quickly are likely to face significant challenges when trying to sell their property – and could finally be stuck with a property they can't sell. Career improvement programmes, in-house valuation, auctions and administrative help, venture advertising and marketing, skilled talks and traisning are continuously planned for the sales associates to help them obtain better outcomes for his or her shoppers while at Knight Frank Singapore. No change Present Rules

    Extending the tax exemption would help. The exemption, which may be as a lot as $2 million per family, covers individuals who negotiate a principal reduction on their existing mortgage, sell their house short (i.e., for lower than the excellent loans), or take part in a foreclosure course of. An extension of theexemption would seem like a common-sense means to assist stabilize the housing market, but the political turmoil around the fiscal-cliff negotiations means widespread sense could not win out. Home Minority Chief Nancy Pelosi (D-Calif.) believes that the mortgage relief provision will be on the table during the grand-cut price talks, in response to communications director Nadeam Elshami. Buying or promoting of blue mild bulbs is unlawful.

    A vendor's stamp duty has been launched on industrial property for the primary time, at rates ranging from 5 per cent to 15 per cent. The Authorities might be trying to reassure the market that they aren't in opposition to foreigners and PRs investing in Singapore's property market. They imposed these measures because of extenuating components available in the market." The sale of new dual-key EC models will even be restricted to multi-generational households only. The models have two separate entrances, permitting grandparents, for example, to dwell separately. The vendor's stamp obligation takes effect right this moment and applies to industrial property and plots which might be offered inside three years of the date of buy. JLL named Best Performing Property Brand for second year running

    The data offered is for normal info purposes only and isn't supposed to be personalised investment or monetary advice. Motley Fool Singapore contributor Stanley Lim would not personal shares in any corporations talked about. Singapore private home costs increased by 1.eight% within the fourth quarter of 2012, up from 0.6% within the earlier quarter. Resale prices of government-built HDB residences which are usually bought by Singaporeans, elevated by 2.5%, quarter on quarter, the quickest acquire in five quarters. And industrial property, prices are actually double the levels of three years ago. No withholding tax in the event you sell your property. All your local information regarding vital HDB policies, condominium launches, land growth, commercial property and more

    There are various methods to go about discovering the precise property. Some local newspapers (together with the Straits Instances ) have categorised property sections and many local property brokers have websites. Now there are some specifics to consider when buying a 'new launch' rental. Intended use of the unit Every sale begins with 10 p.c low cost for finish of season sale; changes to 20 % discount storewide; follows by additional reduction of fiftyand ends with last discount of 70 % or extra. Typically there is even a warehouse sale or transferring out sale with huge mark-down of costs for stock clearance. Deborah Regulation from Expat Realtor shares her property market update, plus prime rental residences and houses at the moment available to lease Esparina EC @ Sengkang

support.borinquenhealth.org - http://support.borinquenhealth.org/entries/35126754-Hostgator-Exchange. Hostgator is a huge privately possessed hosting company operating from numerous state of the art facilities in Dallas, Texas. Hostgator was started in 2002, since then they have actually grown rapidly and presently host over 400,000 sites.

Hostgator offers many various web hosting plans, and cater to a broad variety of consumers. From the first time web designer who requires simple, stress free hosting for their personal website; all the means through to huge companies, who require specialist dedicated hosting services.

Hostgator's hosting packages can be split into 3 teams; conventional shared hosting strategies (suitable for the huge bulk people), reseller hosting strategies (these are mainly for people and companies that want to "resell" their account resources to consumers of their own), and lastly devoted server strategies (these accounts give customer their own server, so they do not have to share its resources with anybody else). Very few of us will every require a specialized server so this evaluation will focus on the shared hosting plans that Hostgator offer.

Features

Hostgator's three main shared hosting strategies are named: "Hatchling" (the entry level strategy priced at $6.95 / month), "Baby" (this is the most popular plan, and it is likely to satisfy the requirements of a really broad range of customers), and "Swamp" (much the same as the "Infant" plan, but with boosts in bandwidth and disk space, priced at $14.95 / month).

For a complete list of functions and a side by side comparison of all hosting plans you ought to visit Hostgator's site below. Below is a review of the most essential functions of the "Infant" strategy, this is most likely the most suitable bundle for a lot of users, and it is our favored plan.

Disk area 100GB - This quantity has been just recently upgraded by Hostgator from 5GB to a huge 100GB. All users are likely to find it difficult to exhaust this amount of disk space.

Bandwidth 1000GB/month - Also enhanced is the bandwidth allotment, from 75GB to a seemingly extreme 1000GB. Again virtually absolutely no possibility of utilizing all that, but it's good to know that you certainly will not be facing extra costs for reviewing your limitation, even if you have a really busy website(s).

Website Studio website home builder - This is a wonderful free of cost program that allows you to build your site from scratch. You have over 500 design templates and color schemes to pick from. You require no HTML experience, or code writing understanding. It offers the simplest possible means of creating a professional looking site in a really brief space of time. However, there is no should take my word for it, as Hostgator offers us with a trial version of the software on their internet site!

Unrestricted add-on domains - This actually is the stand out function of this hosting strategy (the "Hatchling" plan just permits 1 domain), and enables you to host as many internet sites as you like on a single account, at no extra cost. This permits you to make complete use of your huge bandwidth and disk space allowances, and host numerous websites at a fraction of the regular expense.

99.9 % Uptime guarantee - This basically informs us that Hostgator is a serious host offering a trustworthy service. If uptime drops below this figure in any offered month then you don't spend for that months hosting, it's as simple as that! We would never ever consider using a host that did not provide a strong uptime assurance; this is simply because there is only one excellent reason why a host will not offer an uptime assurance - unreliable uptime!

30 Day refund guarantee - This has become a pretty conventional attribute in the hosting area, though it's nice to have for included assurance.

Instantaneous setup - Many hosting providers take 24-48 hours to setup your account but Hostgator guarantees to have you up and running in under 15 minutes (they do not charge a setup charge either)!

Unrestricted MySQL data sources - This is really useful since each Fantastico (see below) script needs its own MySQL data source.

Fantastico DeLuxe - This remarkable program enables you to instantaneously set up over 50 scripts via your control panel. Scripts consist of blogs, online forums, galleries, shopping carts, and more.

Endless e-mail accounts - Allows you to have as many, or as couple of, different e-mail addresses as you such as.

cPanel control panel - At the heart of any web hosting experience is the control panel, thankfully Hostgator makes use of among the best systems around, a cPanel. It's well laid out and easy to run. It contains numerous functions and offers great performance. Most importantly, there is a complete working demo on the Hostgator website, so you can check it out yourself!

Customer care and technical support

Hostgator gives us 24/7 phone support, and live online talk. The truth that you are provided two choices to receive instantaneous technical support at any time of the day is great. Our experience has actually constantly been very excellent when contacting Hostgator, their operatives are very respectful and most importantly they seem to know their stuff when dealing with technical concerns.

Efficiency

The performance from Hostgator's servers is outstanding! Hostgator place much tighter limits on the variety of websites sharing the exact same server compared to most various other shared hosting suppliers. This gives higher reliability due to the fact that less strain is put on the servers; and it also greatly improves the speed at which your websites run.

Server efficiency is an additional among the essential locations where Hostgator distinguish themselves from the crowd of various other webhosting.

Our judgment

Overall there is a lot to such as about the method Hostgator does business, they actually do appear to have a great grasp on what the typical consumer needs from an internet hosting carrier. Hardly ever do you discover reports of unhappy Hostgator customers, and after hosting with them ourselves we now know why! Dependability, performance, and uptime from the servers is first rate, also client service is means ahead of many other webhosting out there. Nevertheless, the location where Hostgator really excels is value for money. At just $9.95 / month for the "Infant" strategy (which consists of limitless domains); anybody looking to host even more than one internet site has a rather simple decision to make. The other fantastic aspect of this bundle is that you do not need to sign up to an agreement. You pay on a month-by-month basis, which leaves you free to cancel your account at any time without losing money. To sum up, we don't really have any bad things about Hostgator; at the rates they charge, we genuinely feel that they offer a phenomenal service. Sustain the great Hostgator!