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Tag: "division" at biology news

Columbine flowers develop long nectar spurs in response to pollinators

...cording to William Zamer, deputy director of NSF's division of integrative organismal systems. "In the case of these flowers, changes appear to happen relatively rapidly in response to changes in pollinators," said Zamer....

Research shows cord blood comparable to matched bone marrow

...or of the University of Minnesota Medical School’s division of Pediatric Hematology/Oncology and Bone Marrow Transplantation, as senior investigator. The study was done in collaboration with the National Cord Blood Program of the New York Blood Center, New York. Mary Eapen, M.D., associate professor of Ped...

Researchers shed light on shrinking of chromosomes

... such huge amounts of genetic material during cell division and helps preventing fatal defects in chromosome s...ot correctly separated and distributed during cell division we know very well; two daughter cells with either broken chromosomes or different numbers of chromos...

Undergraduate research shows leaderless honeybee organizing

...ing social rules (like human customs and laws) and division of labor. But here the similarity ends. Bees do not have large brains and are not capable of complex thought like humans. Though the bee colony is centered around the queen and her reproductive capabilities, findings by Schneider and others indic...

Surprising origin of cell's internal highways

... vincristine and paclitaxel (Taxol) can block cell division by altering microtubule dynamics. "Many classic chemotherapy strategies affect microtubules, although it's not quite clear how these drugs influence cancer cells differently than normal cells," said Kaverina. "Both microtubule regulation of proli...

Study identifies 5 genetic themes key to keeping stem cells in a primitive, flexible state

...their DNA packaged in a flexible format, keep cell division tightly controlled, prevent signals that might trigger death, repair DNA very effectively, and reinforce all of these characteristics by tightly controlling how molecules can move within the nucleus. The study will be published in the June 20 edition...

Gene expression patterns predict rapid decline in idiopathic pulmonary fibrosis patients

...irector of the Lung Translational Genomics Center, division of pulmonary, allergy and critical care medicine, University of Pittsburgh School of Medicine, these findings offer strong evidence that rapid progressors represent a distinct clinical phenotype compared with the usual slower progressing patients. ...

Anthrax paralyzes immune cells with lethal toxin, UF research shows

...hey can't protect you," said Fred Southwick, M.D., division chief of infectious diseases at the UF College of Medicine and the study's lead author. But exactly how the anthrax toxin wards off neutrophils has puzzled scientists for years. Immune cells rely on rod-shaped filaments called actin to propel them...

UCLA AIDS Institute researchers find a peptide that encourages HIV infection

...Lehrer, distinguished professor of medicine in the division of infectious diseases at the David Geffen School of Medicine at UCLA and a co-author of the present study. Unexpectedly, the researchers discovered that while retrocyclin-1 inhibited infection of CD4 cells with HIV-1 by about 95 percent, the RC-111 ...

The longest carbon nanotubes you've ever seen

...e. The researchers partnered with First Nano, a division of CVD Equipment Corp. of Ronkonkoma, N.Y., to use their laboratory and a specialized furnace called the EasyTube 3000. With the equipment, the researchers were able to break apart hydrocarbons to create a vapor of carbon-atom starting material. With...

Latent memory of cells comes to life

...e empty spaces are filled by new nucleosomes. Cell division is therefore an opportunity for changes in the nucleosomal composition of a specific DNA region. Changes can also happen during the lifetime of a cell due to chemical reactions allowing interconversions between the different nucleosome types. The eff...

Scientists genetically engineer tomatoes with enhanced folate content

... a pregnancy or who are pregnant. Without it, cell division would not be possible because the nutrient plays an essential role in both the production of nucleotides--the building blocks of DNA--and many other essential metabolic processes. Deficiencies of the nutrient have been linked to birth defects, slo...

Brown cancer biologists identify major player in cell growth

...Either way, cells go quiet. What can restart cell division -- the process that drives the development of embr...t the same time, other genes known to restart cell division were unchanged. The team confirmed GABP's critical role in cell growth another way. Simply forcin...

New details on how the immune system recognizes influenza

...ndro Sette, Ph.D., who heads the Vaccine Discovery division at LIAI and is the lead investigator on the project. For the current study, Dr. Sette and his colleagues examined 600 different epitopes from 58 different strains of influenza A virus. One of their main goals was to determine how conserved, or sim...

New protein inhibitor impedes growth of cancerous cells

...t by impeding multiple functions required for cell division and survival. One particular class of proteins, kn... is known to play especially critical roles in the division of healthy cells, and appears to also be important for cell division in cancer cells, even though th...

Early-stage sperm cells created from human bone marrow

... and were observed to undergo early meiosis - cell division - the next stage to them becoming mature sperm cells, although they did not develop further. Talking about his newly published research paper, Prof Nayernia, of Newcastle University, said : "We’re very excited about this discovery, particularly a...

Scientists find new genes for Crohn's disease

...e said. Stephen P. James, M.D., director of the division of digestive diseases and nutrition at the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) agreed, saying that "these important discoveries not only offer new hope for better therapies for patients with Crohn's disease, but t...

Health Canada approves cold and flu medicine

... the Natural Health Products Directorate (NHPD) ?a division of Health Canada responsible for evaluating the safety, efficacy and quality of natural health products (NHPs) ?has issued COLD-fX with a much sought after license to sell to the public with specific science backed claims. The comprehensive treatme...

Bumblebee house warming -- it takes a village

...e committed to that task. This kind of size-based division of labor might make the colony more efficient." The researchers studied Bombus huntii, a species of bumblebee common in the Pacific Northwest. Bumblebees, unlike most insects, are warm-blooded. They can heat their bodies, and can remain active a...

Cells use 'noise' to make cell-fate decisions

...e," said Dr. Süel, a member of the systems biology division of the Cecil H. and Ida Green Comprehensive Center for Molecular, Computational and Systems Biology at UT Southwestern. "Even though each cell may have the same set of genes turned on ?the same hard-wired genetic circuit ?there will still be slight v...

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