The big community of researchers regularly studying C. elegans had missed discovering the selfish role for a simple reason: The main
lab strain of nematodes carries the selfish element, explains study coauthor Eyal Ben - David.
Earlier experiments in
the lab strain had shown that disabling pha - 1 caused death in offspring — which it certainly does.
The researchers studied growth rates and lag times in
both lab strains and wild yeast by varying the amount of its prime carbon food source, glucose.
Like many influenza virologists, John Steel of Emory University in Atlanta often uses a feeble
lab strain of influenza in his studies of how seasonal flu spreads.
«It's a nasty virus if you're a mouse» but doesn't sicken humans, Steel says of this 80 - year - old
lab strain, known as PR8.
That very likely means that the virus will transmit between humans as well, Fouchier told ScienceInsider last month, adding that
the lab strain is «probably one of the most dangerous viruses you can make.»
Pletcher's group exposed two
lab strains of fruit flies on caloric restriction to smells created by live yeast, an important constituent of the fly's diet.
In
the lab strains, the scientists had identified mutations in a gene encoding a protein called cadherin.
Researchers Herman Dierick and Ralph Greenspan of The Neurosciences Institute in San Diego, California, set out to see if they could breed high levels of belligerence back into
lab strains and to learn what genes might be implicated.
Dr. Ohhira's Probiotics ® is fermented using 12 strains of lactic acid bacteria (LAB) including the proprietary TH10 strain whose proteolytic strength is six times stronger than any other known
LAB strain.
Complete Probiotic and Prebiotic System: Dr. Ohhira's Probiotics ® are fermented for three years using 12 strains (12 Probiotic Strains) of lactic acid bacteria (LAB) including the proprietary TH10 strain, which is six times stronger than any other known
LAB strain.
The Original Formula is fermented for three years using 12 strains of lactic acid bacteria (LAB) including TH10, Dr. Ohhira's propretary
LAB strain.
Not exact matches
The company currently uses a
lab test that takes a minimum of eight hours, and sometimes up to a day or two, to get a readout of what phage or phages will work best against a particular
strain of bacteria.
LAB with improved functionality of colonic
strains has been achieved in presence of prebiotics such as non-digestible components viz., glucan, arabinoxylan, oligosachharides, resistant starch in cereals; and glucose, fructose, hemicelluloses and dietary fibersin fruits and vegetables.
Probiotic
strains of lactic acid bacteria (
LAB) can also bring health benefits by releasing bioactive peptides.
Stability of Antiradical Activity of Protein Extracts and Hydrolysates from Dry - Cured Pork Loins with Probiotic
Strains of
LAB
The scientists believe that because they included eight mutations in their
lab - made viral
strain, it is unlikely the virus will revert back to its original, more dangerous form (a common concern with any live - virus vaccine).
The microfluidic technology, developed in the
lab of professor Mark Hayes in the Department of Chemistry and Biochemistry at Arizona State University, uses microscale electric field gradients, acting on extremely small samples, to tell the difference between the two
strains (antibiotic - resistant and antibiotic - susceptible) of Staphylococcus epidermidis.
«With new
lab - evolved enzymes, the microbes make precisely configured
strained rings that chemists struggle to make.»
In the Kruglyak
lab, however, Ben - David and fellow postdoc Alejandro Burga were doing a project that required crossing the usual
lab nematodes with the DL238
strain from Hawaii.
His
lab eventually sold mouse
strains all over the country.
Strains of the
lab workhorse roundworm C. elegans that lived longer added more time being frail and had the same portion of their lives being healthy as normal worms.
The upside, however, was that once I knew, I was able to convince a zoology professor to let me do my M.S. in his roundworm
lab by comparing
strains that looked alike under the microscope but weren't on a genetic level.
Verstrepen's team is continuing research to breed new yeast
strains with characteristics useful to industry, and will soon be adding a brewery to the
lab to conduct further experiments.
FOLLOWING an astonishing blunder that may have allowed a lethal pandemic flu
strain to escape from the
lab, researchers are calling for a higher level of security to be imposed on work with flu viruses.
The intact virus is pretty redundant as a research tool: the genomes of many
strains have been thoroughly sequenced and key proteins required by the functioning virus can be made in the
lab.
It was kind of a silly thing — identifying how much iron a particular
strain of yeast needed to grow optimally but it hooked me on science and
lab work.
After eradication, the WHO closed smallpox research
labs across the world and destroyed all stocks of the virus except for two duplicate sets of representative
strains, which were kept for research in two high - security establishments.
In
lab tests, the material killed 99.97 percent of MRSA, the
strain of Staphylococcus aureus that is resistant to methicillin and other antibiotics, and 99.85 percent of a multidrug - resistant
strain of E. coli.
Prior tests found that high concentrations of the soccer ball — shaped buckyballs can kill pure
strains of bacteria growing in the
lab.
Barbara Rehermann and Stephan Rosshart first collected 800 wild house mice (Mus musculus domesticus) in the Washington, D.C., metro area, and compared their DNA and gut bacteria both with a
lab mouse
strain and with wild mice from all over the world.
In the
lab, the team mixed each
strain of K. veneficum with a species of algae on which it preys, and recorded the three - dimensional motions of thousands of cells using a high - speed holographic microscopy technique they described in 20071.
Now, an international team of scientists led by Stewart Cole's
lab at EPFL's Global Health Institute have isolated, sequenced and analyzed the genomes of 154
strains of M. leprae from around the world.
They discovered the S139N swap caused the most severe clinical outcomes but they also note other modern Zika virus
strains without this mutation (some occurring in the wild and others that were
lab - made) could also cause mild microcephaly and other cellular harm to mice.
With our
Lab - on - a-Chip system, thus a miniaturised lab, we are able to clearly identify bacterial strains and their resistances, in less than three hours.&raq
Lab - on - a-Chip system, thus a miniaturised
lab, we are able to clearly identify bacterial strains and their resistances, in less than three hours.&raq
lab, we are able to clearly identify bacterial
strains and their resistances, in less than three hours.»
Columbia University microbiologist Vincent Racaniello, who helped develop the first artificial virus in the 1980s, cites the stir created four years ago when nearly 5,000
labs seeking accreditation were mistakenly shipped vials of the 1957 pandemic flu
strain as part of their test kits.
Researchers in Kunkel's molecular genetics
lab identified a novel enzyme that P. syringae
strain DC3000 uses to synthesize auxin.
As a graduate student in the
lab of microbiologist John Boothroyd of Stanford University School of Medicine, Pernas questioned two existing assumptions: that all three main
strains of Toxoplasma interact with mitochondria in the same way, and that the key protein underpinning this relationship had already been found.
Conlon's team is now sequencing P. aeruginosa
strains to see how gene sequences vary between
strains and how this variance affects the ability of these
strains to produce the aforementioned factors Conlon's
lab has described.
So, researchers at CDC and collaborators used a
lab technique called reverse genetics to make combinations of H3N2, a seasonal human flu
strain, and the 1997
strain of H5N1.
Then the researchers pitted the bugs against a batch of susceptible
strains, dumping both onto
lab dishes to see which would reproduce more effectively.
But some virologists believe that research on the mutant
strains should be confined to BSL - 4
labs, where the most dangerous viruses, such as Ebola, are studied.
Ant colonies that grow their own specialty fungus for food can die when coaxed into trying to farm unfamiliar
strains,
lab tests show.
The experiments that created the mutant H5N1
strains were done in BSL - 3 «enhanced»
labs.
Department of Energy national
lab researchers found
strain dramatically influences low - temperature oxygen electrocatalysis on perovskite oxides, enhancing bifunctional activity essential for fuel cells and metal — air batteries.
In
lab tests, bacterial
strains of the genera Bacillus, Lactococcus, Pantoea and Burkholderia effectively inhibited the growth of Pseudomonas bacteria isolated from infected acacia leaves.
Gilmore's
lab sequenced the toxin producing E. faecium
strain as part of a much wider search for the origins of enterococcal antibiotic resistance and disease - causing ability.
Lab tests found the exact same
strain of GBS that had infected the baby in the placenta pills.
Investigators found four other incidents in the past decade when deadly pathogens were mishandled, including an event in March when a sample of the avian flu
strain H5N1 was contaminated with a more lethal
strain and accidentally shipped to a USDA
lab without proper protections.
Bob Holmes reports that keeping E. coli in constant
lab conditions over many generations does not result in a
strain...