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Tag: "pure" at biology news

Specialized immune-system B cells play double-barreled role

...d the researchers to isolate sufficient numbers of pure B-1b cells for study. The researchers studied how the immune systems of the two mouse strains reacted to infection with Streptococcus pneumoniae, the bacterium that causes pneumonia. They found that the mice lacking B-1a cells were susceptible to in...

Recombinant DNA technology may enable oral, rather than injectable, delivery of protein drugs

...the pharmaceutical industry to produce safer, more pure and more effective versions of therapeutic proteins, Shen adds. "Since recombinant therapeutics utilize human proteins, they do not induce an unwanted immune response like products created from non-human sources often do." On behalf of Shen and his...

Mother birds increase progesterone to hatch females

...one (dissolved in sesame oil) or a control dose of pure sesame oil. The low dose of progesterone produced 61 percent males, which was very close to the control group rate of 63 percent males. The high dose of progesterone, however, produced only 25 percent males. "Thus, we think that how much progestero...

Stem cell research - new cell lines

...e problem. It gives the hope that we can produce a pure population of those cells in large numbers and transplant them into the patient." The researchers are currently in the discovery phase, where they are trying to characterise the three clonal lines they have developed. "It is too early to say anythi...

Advancements In Genomics Foster Deep Sea Discoveries

...1960s by Art Yayanos, who was the first to isolate pure cultures of high-pressure-adapted microbes from their native environments. This work was funded at Scripps Institution by the National Science Foundation. ...

Genetically Modified Natural Killer Immune Cells Attack, Kill Leukemia Cells

...aboratory technique for rapidly producing a large, pure population of NK cells from a small sample of bloo...lified the ability of the researchers to collect a pure population of these immune cells. The researchers then genetically modified the growing NK cells so...

Breakthrough method in nanoparticle synthesis paves the way for new pharmaceutical and biomedical applications

...nanoporous nanoparticles lies in the production of pure chiral drugs, which make up over one-third of all pharmaceutical drugs currently sold worldwide. Chiral drugs are comprised of “left-handed?and “right-handed?molecules, both of which are mirror images of each other. Only one of these molecules provid...

Ants Genetic Engineering Leads To Species Interdependency

...ite, only the queens are geneticallyderived from a pure species-specific lineage, whereas all the workersare hybrids that possess a combination of genes from the two species ina single individual.It is not currently known whether the ants benefit from having hybridsdo the work, but, as is evident from the...

Study shows nanoshells ideal as chemical nanosensors

...ismarkedly different from the pattern exhibited by pure gold or silvernanoparticle films. In that case, the Raman enhancement is an aggregateeffect, due to the presence of localized "junctions" or "hot spots"between metallic regions of the metallic film substrate.The finding that individual nanoshells can...

Genetically modified natural killer immune cells attack, kill leukemia cells

...aboratory technique for rapidly producing a large, pure population of NK cells from a small sample of bloo...lified the ability of the researchers to collect a pure population of these immune cells. The researchers then genetically modified the growing NK cells so...

Tiny particles could solve billion-dollar problem

...alladium powder on an aluminum oxide support base, pure palladium nanoparticles and a hybrid nanoparticle developed by Wong that consists of a gold nanoparticle covered with a thin coat of palladium atoms. As metal particles get progressively smaller, a higher percentage of the atoms in the particle are ...

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