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Tag: "appearance" at biology news

Discovery of the first resistance gene to rice yellow mottle virus

...rice is grown. The disease is characterized by the appearance of mottling and then tissue death on the leaves. The fertility and development of seeds are affected, which causes considerable yield losses at harvest. Transmission of RYMV occurs by way of insect vectors or by straightforward contact between plan...

Vaccination with embryonic stem cells prevents lung cancer in mice

...g a prophylactic vaccine capable of preventing the appearance of various types of cancers in humans, especially those with hereditary, chronological or environmental predispositions to neoplastic disease." However, he warned that the work was still in its early stages and that people should not think that, f...

A buffet for early human relatives

...d more seasonal. That was shortly before the first appearance of stone tools and of Paranthropus and Homo, the genus to which modern humans (Homo sapiens) belong. The researchers noted that Paranthropus often has been portrayed as a specialist that lacked a varied diet, and that has been used to explain why...

New technology to speed up research into Huntington's disease

...tual decline and disorientation) together with the appearance of abnormal movements and impaired motor skills (such as unsteady gait and poor coordination). There is currently no cure and whilst some symptoms can be alleviated, no treatments have been developed that help with cognitive deficits, a distressi...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

... nonprofit science society. On average, the first appearance of cold seep mollusk genera in the geological record is a full epoch earlier than that of marine mollusks in general, according to Steffen Kiel and Crispin Little of the University of Leeds. These findings indicate that the long evolutionary history...

Finding an answer to Darwin's Dilemma

The sudden appearance of large animal fossils more than 500 million year...n 580 million years ago corresponds with the first appearance of large animal fossils on the Avalon Peninsula in Newfoundland. Now for the first time, geochem...

An advanced genetic diagnostic method for multiple myeloma

...recurrent genetic changes that are involved in the appearance of this pathology. A disease associated with old age Multiple myeloma is a disease which primarily affects persons above 60 years of age. In 2001 in Spain, 1716 new cases were detected, and 1554 patients with the disease died, with 20 of these in...

Nerve cell software keeps track of brain change

...to reliably measure significant features of cells' appearance as they change in response to drugs, biochemicals or diseases like dementia. "Benchmarking studies have shown that the software can do this one hundred times faster than a person using manual tracing methods can," Dr Vallotton says. "This improve...

Researchers discover key mechanism by which lethal viruses Ebola and Marburg cause disease

...diseases. Filoviruses, named for their threadlike appearance in electron microscopy (filo= thread in Latin), are associated with outbreaks of fatal hemorrhagic fever in sub-Saharan Africa. Viral hemorrhagic fevers are of specific concern because they are associated with high morbidity and mortality (up to 80% ...

Special chip provides better picture of salmon health

...ervationists currently have to rely on the general appearance of salmon as an indicator of their health, which is far from ideal. The new DNA chip will help farmers assess the state of their stock more accurately and also enable conservationists to sample wild populations to ascertain their health and wellbeing...

Vaccine combined with short-term postexposure antibiotics protects monkeys from inhalational anthrax

...., of USAMRIID. "Our results also suggest that the appearance of an antibody response--after treatment with antibiotics alone or in conjunction with vaccination--might be useful in determining when antibiotics can be safely discontinued." According to Friedlander, inhalational anthrax begins when anthrax spore...

The appearance of your hands can reveal your age, study finds

...s to look more youthful or you are bothered by the appearance of your hands, you may seriously want to consider hand rejuvenation." In the study, people examined unaltered photographs of female hands and were asked to estimate the women's ages, i.e., younger than 20 years, 20 to 30 years, 30 to 40 years, etc....

A new kind of mutation could explain numerous phenotypic variations in various species

...use a specific phenotype. The mutation created the appearance of an "illegitimate" microRNA (miRNA) recognition site in a gene that did not have it in its normal form. In this study, the gene concerned is the myostatin. This gene is expressed in the skeletal muscle and the function of the derived protein is to...

Zebra finch males prefer females with exaggerated maternal traits

...earchers have demonstrated that learning about the appearance of their parents may give birds a preference for mates with exaggerated parental traits, rather than traits that more exactly match those of their parents. Such learned mate preferences may help drive the evolution of exaggerated traits and strong mo...

Massive duplication of genes may solve Darwin's 'abominable mystery' about flowering plants

... of flowering plants immediately after their first appearance some 140 million years ago. By developing new sta...ancient whole-genome duplication that preceded the appearance of the ancestral flowering plant. The results will appear in the June issue of Genome Research. Cl...

Ten years later, Dolly is still making headlines

... scientists share insight Making his first U.S. appearance since his book, About Dolly, hit shelves earlier this month, Dr. Ian Wilmut, the lead researcher of a team of scientists who were first to successfully clone an animal, Dolly the sheep, ten years ago, will speak about his plans to clone embryos to al...

Small molecule interactions were central to the origin of life

...that the origin of life began with the spontaneous appearance of a large, replicating molecule such as RNA. Instead, Shapiro raises an alternative that does not depend on a "stupendously improbable accident," presenting the more plausible idea that life began within a mixture of simple organic molecules, multi...

Scientists to employ Arctic ice and polar bears to protect diversity of world's crops

...atory tract. The resulting vaccine had the outside appearance of a dangerous virus that would stimulate the immune system, but the inside genes of a harmless variety of virus that could not cause disease. The St. Jude team was the first to use reverse genetics to make a vaccine against H5N1 that moved out of th...

New light microscope sharpens scientists' focus

...ect these molecules, although Hess describes their appearance under the microscope as "little fuzzy round balls." As Betzig's work in the early nineties had shown, pinpointing the center of these fuzzy balls can identify the location of the labeled protein to the nanometer scale. But if the molecules are too cl...

H5N1 vaccine could be basis for life-saving stockpile

...atory tract. The resulting vaccine had the outside appearance of a dangerous virus that would stimulate the immune system, but the inside genes of a harmless variety of virus that could not cause disease. The St. Jude team was the first to use reverse genetics to make a vaccine against H5N1 that moved out of th...

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