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Tag: "appearance" at biology news

New Species of Coral Discovered Off Southern California

... microscopy, Zentgraf’s team was able to show that appearance and shape of the virus particles thus created cannot be distinguished from normal HIV. By simultaneous production of GFP-extended and normal structure protein, PD Dr. Barbara Müller was able to produce, under a fluorescence microscope, clearly visibl...

Virologists make major step towards understanding the process of HIV infection

... microscopy, Zentgraf’s team was able to show that appearance and shape of the virus particles thus created cannot be distinguished from normal HIV. By simultaneous production of GFP-extended and normal structure protein, PD Dr. Barbara Müller was able to produce, under a fluorescence microscope, clearly visibl...

Ebola virus: from wildlife to dogs

...nce of the virus in the regions where, besides the appearance of cases of both animal and human deaths, there is no external sign as to whether or not Ebola virus is present. This research work as a whole indicates the progress that has been made over the past years in the understanding the ways in which the v...

15-year hunt finds cause of pseudothalidomide syndrome

...al effect. "For decades now, we've known that the appearance and number of chromosomes were abnormal in people with Roberts syndrome, but we hadn't been able to figure out why or how," says Ethylin Jabs, M.D., a professor in the McKusick-Nathans Institute of Genetic Medicine at Johns Hopkins. "Just within the ...

Bobbing birds do it for a reason

...n no other vertebrates, gives them a vaguely comic appearance but is known to be critical for visual stabilization during body movement. What was not known was whether or not this means of avoiding "motion blur" was essential for high-quality vision in birds; many animals, including humans, stabilize visual fie...

Gladstone investigators discover how resting T cells avoid HIV infection

...m exist in a resting, inactive state, awaiting the appearance of their specific antigen. When they detect its presence, they spring into action -- growing and dividing, releasing cytokines (proteins that the immune system uses to communicate between cells) and recruiting and activating additional T cells. The n...

NIAID begins clinical trial of West Nile virus vaccine

...ly isolated in Uganda in 1937, made its first U.S. appearance in New York City in 1999. The virus usually is transmitted to humans through the bite of a mosquito that has been infected after feeding on an infected bird or animal. The virus also can be spread through blood transfusions, organ transplants and bre...

Scientists discover that three overlapping signals in embryo help get the backbone right

...and tail, left and right established and the first appearance of a recognizable body plan. If this step fails, the embryo eventually dies. "Gastrulation and the process of defining your back-belly axis is such an important step that you actually have multiple proteins being expressed there, just in case one of...

Researchers unlock mechanism creating jigsaw puzzle-like plant cells

...esults are structures that, despite their delicate appearance and slenderness, provide the strength necessary to allow the plant to grow and thrive. The findings point out that these distinct signals play a critical role in the development of leaf cell walls and leaf structures in a controlled and ordered way ...

Promising new West Nile therapy cures disease in mice

...irus alarmed Americans when it made its first U.S. appearance in New York City in 1999. It has since spread from coast to coast, sickened more than 16,000 Americans and killed more than 600. As the virus spread, medical investigators hastened research to develop an effective vaccine or therapy. None currently e...

Molecular models advance the fight against malaria

...n new anti-malarial drugs with features making the appearance of resistance more unlikely. "Within the next 3-5 years, we hope to develop a new drug that will finally empower us to treat this terrible disease," said Trumpower. Dartmouth Medical School co-authors of the paper are Dr. Jacques Kessl, research as...

NC State scientist finds soft tissue in T. rex bones

...es present in the T. rex sample displayed the same appearance as the blood and bone cells from the ostrich sample. Schweitzer then duplicated her findings with at least three other well-preserved dinosaur specimens, one 80-million-year-old hadrosaur and two 65-million-year-old tyrannosaurs. All of these specim...

Learning to fight an adversary that won't stay down

...ncement of Science in Washington D.C. The ongoing appearance of new pathogen varieties like multi-resistant E. coli and Staphylococcus aureus (MRSA), the bacterium that causes methicillin-resistant tuberculosis, provide good examples of the challenges we face, says Dr. Davies. Ironically, he says, advances in...

Cytoplasm affects the number of vertebrae in carp-goldfish clones

... to the nuclear donor species, Cyprinus carpio, in appearance and in most physical traits. The number of vertebrae in the clones, however, was in the range of the recipient species, Carassius auratus. Yong-Hua Sun, Shang-Ping Chen, Ya-Ping Wang, Wei Hu, and Zuo-Yan Zhu, who conducted this work at the Institut...

A gene's first 'kiss' sets off that affair known as puberty

...mical equivalent to Adam and Eve ?makes its sudden appearance in a region of the brain called the hypothalamus just as puberty begins, according to a study published in this week's online edition of the Proceedings of the National Academy of Sciences (PNAS). Until now, little had been known about what instig...

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