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Tag: "culture" at biology news

Bugs, even 'bad' ones, can be educationally beneficial, new book says

...list Leopold Trouvelot brought them to use in silk culture experiments. A few escaped as caterpillars and their descendants thrived, leading to rampant defoliation 20 years later. Such destruction has led people to devise various methods to exterminate bad bugs. "The least creative way to get rid of bad bu...

Researchers Identify Cause of Early Bird Sleep Disorder

...ge a person's sleep behavior. Evidence from tissue culture experiments with the second gene suggests the change causes a protein -- an enzyme called a kinase that is made by the gene - to be less active than normal. The lead author of the paper in Nature is Ying Xu, a member of the team in San Francisco. Ot...

Sponges as drugs

...pharmaceutical industry might be produced. Sponge culture The researcher tried to rear 9 of the 151 species...al synthesis, genetic modification and sponge cell culture are realised, rearing in the sea remains the most reliable and effective method for obtaining the la...

Cancer related gene p53 not regulated as indicated by previous tissue culture research

...nus instead of the normal version. Previous tissue culture studies by several labs around the world indicated that tinkering with the tail end prevented the protein from being flagged for degradation or activation. Instead of accumulating in mouse cells and halting cell division in the genetically engineered...

UN: World in big ecological mess

...rns us all, whether we work in education, science, culture or communication," UN Educational, Scientific and Cultural Organization (UNESCO) Director-General Koïchiro Matsuura said in a message in Paris. "The work of the Millennium Ecosystem Assessment makes clear how ecosystems and human health are intertwi...

Research on antibiotics receives historical recognition

... who noted that a mold contaminant on a Petri dish culture had inhibited the growth of bacteria. Streptomycin was the third antimicrobial agent isolated under Waksman's direction at Martin Hall at Cook College, Rutgers University. Streptomycin, however, was the first agent not toxic to humans, and it attack...

Researchers grow stem cells from human skin

...isolate single stem cells, which they then grew in culture dishes in the laboratory. The scientists used hormones and growth factors to coax the stem cells into becoming fat, muscle and bone cells. When the differentiated cells were seeded onto three-dimensional molds and implanted in mice, they maintained ...

Achilles heel of the herpes virus possibly found

...am members in working with the genomic library and culture of human and pig cells, especially U-M doctorate graduate Aleida Perez and postdoctoral fellows Qingxue Li and Pilar Perez-Romero. Perez-Romero is first author of one of the two new papers, and a co-author on the other. The two new papers show that ...

First production of human monoclonal antibodies in chicken eggs published in Nature Biotechnology

...erapeutic antibodies produced by conventional cell culture methods. The new report was published in the Sept...ns as an alternative to established mammalian cell culture systems," said Robert J. Etches, Ph.D., D. Sc., Origen Therapeutics vice president, research. "Antib...

Anthrax test, developed by army and CDC, receives FDA approval

.... "Wherever the virus is added to the surface of a culture plate that has been inoculated with suspicious anthrax colony growth, you can see clear zones where the B. anthracis cells have been destroyed--whereas other bacterial cells grow unaffected." Well before the anthrax attacks of 2001, scientists at US...

'Mad cow' proteins successfully detected in blood

.... "Wherever the virus is added to the surface of a culture plate that has been inoculated with suspicious anthrax colony growth, you can see clear zones where the B. anthracis cells have been destroyed--whereas other bacterial cells grow unaffected." Well before the anthrax attacks of 2001, scientists at US...

Scientists succeed in cloning human embryos from eggs matured in the lab

...Belgium, and his colleagues, matured GV oocytes in culture in the laboratory for 44 hours, after which time 85% of the GV oocytes had developed into MII oocytes. From each of these, they removed the nuclear apparatus, which contained the chromosomes that held all the genetic information. Using conventional I...

Invitrogen Launches i-Path -- A Unique Systems Biology Platform at BIO 2005

...Belgium, and his colleagues, matured GV oocytes in culture in the laboratory for 44 hours, after which time 85% of the GV oocytes had developed into MII oocytes. From each of these, they removed the nuclear apparatus, which contained the chromosomes that held all the genetic information. Using conventional I...

Study: Harmless virus kills some cancers

...ential of AAV2, none allowed the AAV2 to remain in culture long enough to see the effect that Meyers and his team observed. "One of the most compelling findings is that AAV2 appears to have no pathologic effects on healthy cells," Meyers said. "So many cancer therapies are as poisonous to healthy cells as t...

Human embryonic stem cells have the potential to develop into eggs and sperm in the laboratory

...ave to prove it was safe because, for example, the culture process may cause genetic changes. For some men and women this would be the only route for producing sperm and eggs. It would not be reproductive cloning as fertilisation would involve only one set of gametes produced in this way and therefore a uniq...

VCU study shows hormone-like molecule kills cells that cause inflammation in allergic disease

...the excess of IFNγ. When researchers tried to culture mast cells from the bone marrow of these mice, the mast cells died. Furthermore, a separate strain of mice with the same mutation as the first strain, but that had also been engineered to prevent IFNγ production, were found to have almost as m...

Climate model links higher temperatures to prehistoric extinction

...the excess of IFNγ. When researchers tried to culture mast cells from the bone marrow of these mice, the mast cells died. Furthermore, a separate strain of mice with the same mutation as the first strain, but that had also been engineered to prevent IFNγ production, were found to have almost as m...

'Jumping genes' contribute to the uniqueness of individual brains

...ened in vivo and couldn't be dismissed as a tissue culture artifact." Transposable L1 elements, or "jumping genes" as they are often called, make up 17 percent of our genomic DNA but very little is known about them. Almost all of them are marooned at a permanent spot by mutations rendering them dysfunctiona...

For first time, brain cells generated in a dish

...l Academy of Sciences, researchers describe a cell culture method that holds the promise of producing a limitless supply of a person's own brain cells to potentially heal disorders such as Parkinson's disease or epilepsy. "It's like an assembly line to manufacture and increase the number of brain cells," sa...

Mass production of human papillomavirus could lead to gains against cervical cancer

...produce a thousand times more infectious virus per culture dish than they could using conventional methods. R...study of the virus, said Ahlquist. "The available culture techniques limited the ability to study critical early stages of infection," said Ahlquist. "We coul...

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