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Tag: "two" at biology news

Experiments provide proof of how traveling in groups protects insects

...d. "In repeated experiments, we found that within two days, 50 percent to 60 percent of insects transplanted out of the band were dead because something ate them," he said. "On the other hand, we found no deaths during the same period among the crickets we monitored that stayed with the band." That ind...

Protein Packages Found To Activate Genes; May Be What Regulates Development And Disease

...d M.I.T., where a complex analysis of packaging of two entire human chromosomes was done for the first time. Besides Bernstein, the investigators included Morris Loeb Professor of Chemistry Stuart Schreiber; Michael Kamal, Eric Lander, and others at the Broad Institute; and their colleagues from Affymet...

New research questions basic tenet of neuron function

...naptic vesicles release their neurotransmitters in two different "modes" ?one when the neuron is stimulat... Feb. 17 issue of the journal Neuron suggests that two distinct types of synaptic vesicles are responsible for the two different modes of neurotransmitter ...

Weill Cornell Research Reveals Secrets Of Trafficking Within Cells

...up with a whole new method of inquiry. It combined two pre-existing technologies -- RNA interference (RNAi), where scientists cut down on protein expression by jamming the responsible gene with bits of RNA; and microscopy, which looks at the activity of individual living cells by attaching a fluorescent ...

Experiments provide proof of how traveling in groups protects insects

...d. "In repeated experiments, we found that within two days, 50 percent to 60 percent of insects transplanted out of the band were dead because something ate them," he said. "On the other hand, we found no deaths during the same period among the crickets we monitored that stayed with the band." That ind...

New Study from Affymetrix Laboratories Points to Changing View of How Genome Works

...he Science manuscript. "These data point us toward two critical and exciting questions: What are the func...-coding genes, even though they make up only about two percent of the human genome sequence. The new study by Gingeras' team did not make any assumption o...

First-ever Compounds To Target Only Metastatic Cells Are Highly Effective Against Breast, Prostate, And Colon Cancers

...re," he explained, "and what we ended up with were two compounds -- core macroketone and core macrolactam...ues must be working on something upstream of those two important steps," Dr. Huang said. Dr. HuangÕs next important step is moving these analogues into cl...

Discovery of key protein's shape could lead to improved bacterial pneumonia vaccine

...immune systems of very young children (youngerthan two years) do not naturally respond to carbohydrates. Pneumococcusvaccines for children must instead be modified by binding thosecarbohydrates to special proteins that stimulate the immune systems ofyoung children. “However such vaccines are so complex t...

Critical role in programmed cell death identified

... show that mitochondria are part of it. It unifies two different hypothesis and makes worms a great model to analyze how cell death is induced, " Conradt said. Mitochondria are dynamic structures, constantly changing shape, budding and fusing. In cells instructed to die, the mitochondria tend to become ...

New comparative toxicogenomics database

...immune systems of very young children (youngerthan two years) do not naturally respond to carbohydrates. Pneumococcusvaccines for children must instead be modified by binding thosecarbohydrates to special proteins that stimulate the immune systems ofyoung children. “However such vaccines are so complex t...

Taking Aim With Nanoparticle PEBBLEs

...ted PEBBLEs, some rats were still alive and active two months later, and MRI images showed that their tumors had vanished. Kopelman and coworkers plan to tinker with the PEBBLEs a bit more before trying them on larger numbers of rats, and PEBBLE-based cancer treatments for people are a long way off. But...

Elephants imitate truck noises, other animals

...nd the University of Vienna studied sounds made by two African elephants, one living among semi-captive orphaned elephants and the other with two Asian elephants in a zoo. One imitated truck noises heard from a nearby highway, the other the chirp...

Genetically modified natural killer immune cells attack, kill leukemia cells

...s so they carried on their surfaces many copies of two different proteins, 4-1BBL and IL-15. The genetically modified K562 cells quickly stimulated the expansion of the NK cell population to more than10,000 times their original number. The technique triggered growth of NK cells specifically, which greatl...

Open microfluidic and nanofluidic systems

...polymorphism of the wetting liquid depends only on two parameters: (i) the channel geometry, i.e., the ratio of the channel depth to the channel width; and (ii) the interaction between substrate material and liquid. One has to distinguish seven different liquid morphologies which involve localized drople...

Gene Vaccine Protects Mice Against Development Of Her2/neu Breast Cancer

... thatcontained an influenza protein, and the other two groups received oneof two different doses of the VRP-neu vaccine. Researchers thenimplanted a HER2/neu-positive tumor into mam...

Elephants imitate sounds as a form of social communication

...nd the University of Vienna studied sounds made by two African elephants, one living among semi-captive orphaned elephants and the other with two Asian elephants in a zoo. One imitated truck noises heard from a nearby highway, the other the chirp...

Highly adaptable genome in gut bacterium key to intestinal health

...complete genome sequence of B. theta was generated two years ago in the same laboratory. The researchers inoculated germ-free mice, who have no intestinal bacteria, with B. theta. The mice were fed a diet high in complex carbohydrates and low in simple sugars. Ten days later, the activity of all genes i...

Researchers find missing genes of ancient organism

...l forms of those tRNAs can be made by copying from two distant DNA sequences -- and joining them. The regions on the separate pieces, that allow them to find each other and splice, are somewhat similar to internal sequences found in tRNA genes of more complex organisms., These regions, termed introns, a...

A comprehensive response to HIV could prevent 10 million AIDS deaths in Africa by 2020

... thatcontained an influenza protein, and the other two groups received oneof two different doses of the VRP-neu vaccine. Researchers thenimplanted a HER2/neu-positive tumor into mam...

Ants Genetic Engineering Leads To Species Interdependency

... innovation involving the sharing of genes between two antspecies has given rise to a deep-seated depende... how genetic exchange through interbreedingbetween two species can give rise to a system of interdependence at ahigh level of biological organization - in ...

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