Tag: "material" at biology news
JCI table of contents, July 1, 2005
...A number of issues surrounding the harvest of such material
from prepubertal children with leukemia, that could be safely stored and retransplanted into chemotherapy-damaged testes, have not yet been solved. These include: (i) the harvest of sufficient numbers of healthy germ cells, without significant tissue...
World first: Scientists succeed in cloning human embryos from eggs matured in the lab
...makes best use of more easily available biological material
in this case, immature oocytes."...
Eggs from embryonic stem cells could benefit sterile women
... used for nuclear transfer where an egg's genetic material
is removed and replaced with that of a sterile woman. For eggs, or oocytes, to develop from ES cells, proteins called growth factors are required. The testis is a good source of growth factors, acting as a nursery for the development of eggs and sper...
Tufts researchers shine light on firefly mysteries
...ttractive males would provide females with greater material
benefits and/or genetic benefits," said Sara Lewis, associate professor of biology in the School of Arts & Sciences. "On the other hand, sexual conflict theory predicts that male signals may evolve to provide uninformative or even misleading cues abo...
Breakthrough: Scientists create world's tiniest organic particles
...s where it is difficult to eliminate this residual material
between objects," DeSimone said. Particles injecte...iodegradable, he said. Some are made from the same material
used to make surgical sutures. They will incorporate as "cargo" whatever biological material
From network to system
...tire organism and particularly in how our genetic material
works. Prof. Li Jin, the second Director at the Partner Institute, focuses in particular on the variability of the human genome between individuals, which accounts for just 0.1 percent of our genetic material. What distinguishes humans from one anoth...
Electronic connectivity isn't all that great, warns computer guru at NJIT talk
...s in a global economy. He has been gathering case material
in Brazil and Alaska and Western Australia. Kolb is a senior lecturer and group leader at the University of Auckland Business School, where he has taught in the MBA, undergraduate and graduate programs since 1992. His co-authored textbook (with Kerr...
A better understanding of gene flow
... improved our understanding of the flow of genetic material
between organisms in the environment. Outcomes fro...ty thresholds and restrict the transfer of genetic material
into the environment. Researchers also found that gene transfer from GM organisms to soil bacteria i...
Experimental vaccine protects nonhuman primates from Lassa fever
...SV, as a carrier--into which they inserted genetic material
from the deadly Lassa virus. The team then immunized four rhesus macaques with a single dose of the Lassa vaccine, while two monkeys received only the VSV "carrier" virus.Four weeks later, all six animals were experimentally infected with a lethal do...
Study in Royal Society journal on holly as an indicator of climate change
...hich they "paint" their bower with chewed up plant material
and saliva. Contact: Dr AW Goldizen, School of Integrative Biology, University of Queensland, BRISBANE, QLD 4072, Australia Terminal reproductive effort in a marsupial by Ms JL Isaac and Dr CN Johnson This study used a marsupial to test the predic...
NASA probe could reveal comet life, scientists claim
...er crust of the comet will consist of asphalt-like material
with permafrost beneath. The small icy fragments b...will remain intact despite losing a huge amount of material
100,000 tonnes from a 100 metre diameter crater, and the impact is not expected to alter the comet'...
Trees, vines and nets microbial evolution changes its face
...lso 'horizontally' through the exchange of genetic material
between distantly related organisms. This new view of the tree of life could help us to better understand how disease-causing bacteria manage to stay one step ahead of us in our battle to tackle antibiotic resistance. Since the time of Darwin, the ev...
New study finds how cells with damaged DNA alert the immune system
...nts associated with impairment of a cell's genetic material
-- the DNA damage pathway -- was exposure to radiation and chemotherapy drugs. They found that cells in which the DNA damage pathway was triggered were the ones that exhibited an increase in the expression of special proteins on the cell surface. The...
Using the genomic shortcut to predict bacterial behavior
...at intracellular bacteria did not exchange genetic material
with each other. But Ogata explains that the new findings "forced us to change this static view." In addition to conjugation, the researchers found evidence of other mechanisms for the bacterium to reshuffle its DNA. The R. felis genome encodes a ...
Big ears for British wheat
...the capability from photosynthesis to produce more material
than they do at the moment but they are limited by the size of their ears. We hope that the research we are doing could lift these limitations and enable traditional crossing between lines so that breeders can produce wheat varieties that would thriv...
How HIV disables the cells' call for help
... of immune cell to come to the rescue. The genetic material
of the virus, which is basically a strand of RNA, then forces the cell's DNA to make copies of it. Newly minted viruses created by the host DNA later break out of the cell membrane to infect other cells. Many believed that the very act of breaking in...
Nanotubes inspire new technique for healing broken bones
...orosis. In a typical bone graft, bone or synthetic material
is shaped by the surgeon to fit the affected area,...today are realizing that mechanical mimicry of any material
alone cannot succeed in duplicating the intricacies of the human body," Haddon says. "Interactions o...
New markers of climate change
...of two stable isotopes, 13C and 18O in the organic material
and leaf-water of the plants. These isotopes accumulate in the plant over time and are indicators of photosynthesis and water evaporation, respectively. Because the plants are subjected to conditions such as fog and high rainfall, the levels of these...
Worlds oldest, largest organization of cancer scientists favors 'full spectrum of stem cell research biology'
...ug activity, as well as generate immune-compatible material
for transplant therapies." The primary points of the AACR position on stem cell biology are: Human stem cell research will elucidate critical aspects of cell growth and differentiation that are altered during the formation and growth of tumors. Res...
...ties arise from age-related loss of telomeres, DNA material
on the chromosomes' tips. The telomeres help keep the genes intact during cell division, and since they tend to shorten or degrade as eggs age, the scientists suspected that human eggs with shorter telomeres would have an increased risk for genetic m...
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