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Tag: "origin" at biology news

Insects that produce males from unfertilized eggs reveal a surprising cellular feat

...s a mysterious process. One mystery has been the origin of the centrosome, an essential cellular component...said. They may also hold clues to the evolutionary origin of the Hymenoptera. Because the males of these insects develop from unfertilized eggs, they have hal...

Researchers now able to look deep into heart to view triggers of a heart's beat

...s a mysterious process. One mystery has been the origin of the centrosome, an essential cellular component...said. They may also hold clues to the evolutionary origin of the Hymenoptera. Because the males of these insects develop from unfertilized eggs, they have hal...

Polymer aids in blood clotting, pointing way to new treatment

...okaryotic organisms, challenging the theory on the origin of eukaryotic organelles and suggesting a targeted approach to killing many disease-causing organisms. "Because I saw electron microscopy pictures of the blood platelets' dense granules taken many years ago that were almost identical to the pictures...

Scientists re-engineer a well-known antibiotic to counter drug resistance

...ly a detailed molecular level understanding of the origin of the vancomycin resistance but a total of 24 sequential chemical steps to prepare the new antibiotics; in this case, a single atom in vancomycin was altered to counter an analogous single atom change in the bacterial cell wall that accounts for the...

Sociality of sweat bees evolved simultaneously during climate change

...ms," said Danforth. "It's also news to us that the origin of sociality in halictid bees was so recent." Once the team dated the evolution of the social behaviors to just 20 million to 22 million years ago, they researched what might have been going on in this time frame that would trigger the development o...

UF scientists trace origin of shark's electric sense

...g and navigating. Now researchers have traced the origin of those electrosensory powers to the same type of embryonic cells that gives rise to many head and facial features in humans. The discovery, reported by University of Florida scientists in the current edition of Evolution & Development, identif...

Wisconsin scientists grow two new stem cell lines in animal cell-free culture

...ine serum and replaces them with products of human origin in a recipe that is completely defined. But while the new Wisconsin work represents an important advance for stem cell technology, the ability to now grow embryonic stem cells in cultures free of animal products could accentuate the debate over fede...

Markers of gene, protein, or micro-RNA activity predict outcome in prostate and colorectal cancers

... crypts, and researchers believe that the cells of origin are the 10-20 immortal stem cells that reside at t...opulation dynamics and contribute to the stem cell origin of colon cancer," Boman said. "Our finding of a difference between miRNA expression in normal ver...

AIDS-related cognitive impairment exists in two separate forms

... crypts, and researchers believe that the cells of origin are the 10-20 immortal stem cells that reside at t...opulation dynamics and contribute to the stem cell origin of colon cancer," Boman said. "Our finding of a difference between miRNA expression in normal ver...

UAB researchers confirm HIV-1 originated in wild chimpanzees

...vered a crucial missing link in the search for the origin of HIV-1, the virus responsible for human AIDS. That missing link is the natural reservoir of the virus, which the team has found in wild-living chimpanzees in southern Cameroon. The findings provide important clues to how the disease migrated from n...

UF scientists discover evolutionary origin of fins, limbs

...The sequence of evolutionary events leading to the origin of limbs has been known for some time, but only now are we deciphering how these events occurred at a molecular genetic level." Researchers isolated genes from the spotted catshark, a type of slow-moving shark from the eastern Atlantic Ocean. By st...

UCLA scientists strengthen case for life more than 3.8 billion years ago

...ether life was present, whether the rocks have the origin that was originally attributed to them, and whether the rocks were as old as originally envisioned. We didn't go to Greenland in response to the criticism. We went to learn the age of the rocks and to make a better geologic map of the area than any t...

Possible birthplace of malignant brain tumors identified

...Alvarez-Buylla and his colleagues are the cells or origin for malignant gliomas. They wrote that such work offers "therapeutic opportunities," emphasizing that "the people that matter the most do not have the luxury of time to watch this work unfold. The median interval from diagnosis to death for patients ...

NHGRI announces latest sequencing targets

...nd other genomic features were responsible for the origin of multi-celled organisms? More than 1 billion years ago, two of the major multi-cellular groups of organisms (fungi and animals) shared a single-celled ancestor. This project targets ten of the earliest branches of animals and fungi along with some...

Molecular DNA switch found to be the same for all life

...conformational changes in theDnaA-like core of the origin recognition complex. This study was led by Botchan...irected by a single complex of proteins called the origin recognition complex (ORC). However, until now, models of the ORC proteins have lacked sufficient de...

A new look at the state of the oceans

...h diversity of data entries with varied geographic origin through contributions from across the globe. This large geographic scope is of great importance for plankton research and is currently a unique feature of PLANKTON*NET compared to other data base systems. Networking Currently, PLANKTON*NET consis...

Scientists identify protein with a crucial role in cell death

...ff process and, consequently, probably also in the origin of diseases of ageing, like Parkinson's disease. ...

Plant protection from cold decoded

...ts and can help us better use crops of subtropical origin such as corn, rice, avocadoes and strawberries." Zhu said the discovery of how HOS1 acts on plants should help his overall research efforts into how plants respond to environmental stresses such as cold, soil salinity and drought. "From a genetic a...

Small molecule interactions were central to the origin of life

...ty) argues against the widely held theory that the origin of life began with the spontaneous appearance of a... metabolic network. "If we wish a more plausible origin of life, then we must work with the assumption that life began, somehow, among one of the mixtures o...

Making a face: A new and earlier marker of neural crest development

...f these important stem cells. "Understanding the origin of neural crest cells -- where, when and how they arise -- is a critical step if we are to manipulate them for therapeutic purposes," said Martín García-Castro , assistant professor of molecular, cellular and developmental biology at Yale and princi...

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