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Tag: "relationship" at biology news

Plants, too, have ways to manage freeloaders

...m between plants and bacteria, such as the classic relationship between legumes and nitrogen-fixing bacteria. As legumes such as the lupine sprout, they send out roots that encounter nitrogen-fixing bacteria in the soil. The bacteria infect the roots and stimulate them to form nodules. Nodule cells then engulf th...

Scientists crack code for motor neuron wiring

... from these experiments was a code -- an organized relationship between Hox proteins, their chromosomal organization, and the differentiation and connectivity of motor neuron pools," he said. Jessell said this code appears to govern three levels of motor neuron organization: the columnar organization that ensure...

Stress substantially slows human body's ability to heal

...a new study has shown. Moreover, if the couple's relationship is routinely hostile toward each other, the delay in that healing process can be even doubled. The results of this study have major financial implications for medical centers and health care insurers. The new study, reported in the current issue of...

Yale scientists decipher 'wiring pattern' of cell signaling networks

... , these researchers focused on the expression and relationship between proteins of the yeast cell "proteome," or the proteins that are active in a cell. Protein kinases act as regulator switches and modify their target proteins by adding a phosphate group to them. This process, called "phosphorylation," result...

Marsupial genome reveals insights into mammalian evolution

...data supporting the idea that there was an ancient relationship between the MHC and another critical component of the immune system, the natural killer complex (NKC), which contains natural killer (NK) cell receptor loci. This "immune supercomplex," which no longer exists in modern genomes, performed the MHC fun...

HIV accessory protein disables host immunity via receptor-protein intermediary

...esearch also gives us a new way to think about the relationship between immune activation and sepsis, and it may have implications ultimately for our understanding of novel approaches to prevent sepsis." ...

Environmental tobacco smoke linked to behavior problems in children and pre-teens

...mental tobacco smoke exposure. Dr. Yolton found a relationship between cotinine levels and increases in acting out; increases in holding things in, often manifested by anxiety and depression; increases in behavior problems as rated by parents, and behavior and school problems as rated by teachers; and, decreases...

'Virus chip' detects new virus in prostate tumors

...unclear, and more study is needed to determine the relationship between the virus and cancer, if any, the scientists say. The discovery was made with the same DNA-hunting "virus chip" used to confirm the identity of the SARS virus three years ago. While the genetics of prostate cancer are complex, one of the ...

New male contraceptive clears hurdle

...lse," says Dunlap. "Being in a committed long-term relationship means that I don't want to rely on condoms for birth control. I'm not ready for a vasectomy, though. This new procedure could be the answer that gives men the decisive control we lack with current contraceptives." In the RISUG study, doctors inject ...

New evidence questions the simple link between prion proteins and madcow disease

... disease. Some are questioning whether this simple relationship exists at all. This paper adds new evidence that can inform the debate. Firstly, it is known that individual people and animals have different levels of genetic susceptibility to this group of diseases, but no one knows how this resistance is achiev...

Cortex matures faster in youth with highest IQ

...average (83-108). The researchers found that the relationship between cortex thickness and IQ varied with age, particularly in the prefrontal cortex, seat of abstract reasoning, planning, and other "executive" functions. The smartest 7-year-olds tended to start out with a relatively thinner cortex that thickene...

Minimal genome should be twice the size, study shows

... Wigglesworthia live inside insects in a symbiotic relationship where they provide essential molecules for their hosts in return for essential basic foods. Since evolving from E.coli, the Buchnera and Wigglesworthia genomes have lost some of the genes that they would otherwise need for survival. Using computer ...

Carnegie Mellon scientists show brain uses optimal code for sound

...ts are represented only in terms of their temporal relationship with each other. That's because the intensity and basic frequency of a given feature are essentially "kernalized," or compressed mathematically, into a single spike. This is similar to a player piano roll that can reproduce any song by recording what...

Alcoholism, smoking and genetics among Plains American Indians

...ele. "The answer to this paradox may lie in the relationship between anxiety and drinking patterns," she said. "In societies where regular, daily drinking is the norm, such as in Europe, anxious Met individuals may be more vulnerable to alcoholism through using alcohol as a coping mechanism. In societies whe...

Hyena mothers give their cubs a helpful dose of hormones

...re, is the first study in mammals to demonstrate a relationship between a female's social rank and her ability to influence her offspring's behavior through prenatal hormone transfer. Previously, this phenomenon had only been documented in birds. Michigan State University's Kay Holekamp, together with her collea...

A link is found between morphine addiction and the tendency to explore

...ore perseveringly. This is the first time a direct relationship has been found without other psychological charact... until now no study has objectively found a direct relationship without the influence of other psychological factors, such as anxiousness. A team of researchers fr...

Predicting success

... as that of other research groups, shows that this relationship can differ from one animal to the next, from one human to the next, and even from one tissue to the next in the same animal. Prof. Degani says that, ideally, the fluid pressure inside tumor tissues would be checked using the MRI method she and her ...

Ocean virus identified in human blood samples

...mal species, but this is a previously unrecognized relationship between Vesivirus and humans." "This research also shows an increasing prevalence of Vesivirus antibody in persons who have hepatitis of unknown cause," Smith said. "This suggests there is a broader potential for Vesivirus infection and illness in h...

Mobile phone use not linked to increased risk of glioma brain tumours

...e of brain tumour, finds the first UK study of the relationship between mobile phone use and risk of glioma. The r...k of developing this type of tumour. There was no relationship for risk of glioma and time since first use of a mobile phone, lifetime years of use and cumulative ...

Heart-healthy compound in chocolate identified

...enefits, we have been able to demonstrate a direct relationship between the intake of certain flavanols present in cocoa, their absorption into the circulation and their effects on cardiovascular function in humans," said UC Davis biochemist Hagen Schroeter, who co-authored the paper along with cardiologist Chris...

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