skip to main | skip to sidebar

software, hardware, adware, anti virus, computer, notebook, desktop, desk, keyboard, mouse, monitor, blog, free software, free all. a, b, c, d, e, 10,

Home
About
Contact

Gadged
Mp3
VCC
Motor
Car
travel
Template
Video

Wednesday, May 11, 2011

Trik Windows XP

0

Posted by andha

Labels: trik

0 comments:

Post a Comment

Newer Post Older Post Home

Entri Populer

Agloco Forum Website

Do You Realize How Valuable You Are? Advertisers, search providers, and online retailers are paying billions to reach you while you surf. H...
Chat Software

Chat software is a tool offered by some websites which allows the visitors to get real time support. The user will typically click on a menu...
Contac Us

Email.: magic_andha@yahoo.com Want Buy some ADS or Link? Set your request here SIDEBAR ADS $30. 1 link ADS permanent $50. 1 Link Ban...
Soon after the exciting discovery of a method to turn human adult cells into stem cells in 2007 came the frustration of actually trying to make that transformation efficient. In creating induced pluripotent stem (iPS) cells, scientists typically only get 0.01 percent of a sample of human fibroblast (skin) cells to change. A group led by Duanqing Pei of the Guangzhou Institutes of Biomedicine and Health in China has found that a simple chemical can boost the efficiency by 100-fold—namely, vitamin C. The researchers can trigger the conversion to iPS cells by introducing genes or proteins to adult cells, typically with a virus. Once the cells become pluripotent, they have the ability to become any cell in the body, thereby offering the promise of repairing damaged organs and treating disease. But scientists have yet to come up with the ideal recipe. “It’s a worldwide effort to boost efficiency and make this more practical for much wider participation from the scientific community,” Pei says. In their effort, Pei and his group started with the realization that the factors that induce cells to become pluripotent were causing the cells to make the free radicals known as reactive oxygen species (ROS). “A high level of ROS is definitely very bad for the fibroblasts,” Pei notes, because it speeds cell death. To fight off the ROS, Pei’s team tested a variety of antioxidant chemicals in the cells’ growing medium. Experimenting with mouse cells, the group found that the petri dish containing vitamin C had 30 percent more mouse cells than the dish that did not, suggesting that the antioxidant helped to ward off the effects of aging. Surprisingly, vitamin C not only helped cells survive, but it also enhanced their progression to pluripotency. After 14 days, when cells start to become fully pluripotent, 10 to 20 percent of the mouse cells that were grown with vitamin C expressed genes associated with pluripotency, compared with only 0.1 to 0.2 percent of the colonies grown without vitamin C. The group saw a similar improvement in human fibroblast reprogramming, in which ascorbic acid boosted the conversion rate from 0.01 to 1 percent. The researchers, who published their findings in the December 24 Cell Stem Cell, also tested other antioxidants, but none boosted the development of pluripotency the way vitamin C did. That has lead Pei to believe that, in addition to ascorbic acid’s antioxidant property, an as yet unknown mechanism plays a role. And although more detailed analysis is needed, having vitamin C around does not seem to introduce negative cellular changes. “Overall, I think this is quite impressive progress,” remarks Kwang-Soo Kim, director of the Molecular Neurobiology Lab at Harvard Medical School. Although 1 percent may not seem all that efficient, it could be enough to push the field significantly. “We don’t need to generate 50 percent of the cells,” Kim says, “as long as we can reproducibly generate a sufficient number of iPS lines.”

Soon after the exciting discovery of a method to turn human adult cells into stem cells in 2007 came the frustration of actually trying to...
FrostWire 4.21.6

FrostWire, a Gnutella Peer-to-Peer client, is a collaborative effort from many Open Source and freelance developers located from ...
Thunderbird 3.1.10

Thunderbird is a great email client from the same people who brought you the Firefox browser. Thunderbird gives you IMAP/POP supp...
5 Tips For Buying Accounting Software

Whether you are shopping for accounting software to help budget your personal or business expenses, you may find that managing all of your f...
SUPER v2011 build 48

SUPER is an easy-to-use Multimedia Encoder and Player, requiring only one simple click. If you need a simple, yet very efficient tool...
TeamSpeak Client 3.0.0 RC1 (32-bit)

TeamSpeak is flexible, powerful, scalable software which enables people to speak with one another over the Internet. TeamSpeak con...
TopStyle 4.0.0.87

TopStyle contains powerful tools for building standards-compliant web sites. Preview CSS while you write it. Easily create pleasa...

Visitor

Followers

Blog Archive

► 2012 (7)
- ► January (7)

▼ 2011 (218)
- ► October (3)
- ► August (1)
- ► June (7)
- ▼ May (134)
- ► April (62)
- ► March (10)
- ► January (1)

► 2010 (24)
- ► November (2)
- ► August (2)
- ► June (6)
- ► May (12)
- ► February (2)

► 2009 (1)
- ► June (1)

Feedjit

Powered by Blogger.

SOFTWARE | Template Magajah Portal © 2010 Free Blogger Template Ajah for DheTemplate.com - New Free Blogger Template Everyday