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Tag: "lines" at biology news

Envisat captures first image of Sargassum from space

...y of South Florida were able to identify extensive lines of floating Sargassum in the western Gulf of Mexic... by early explorers. Our observations of Sargassum lines extending over large areas of the Gulf show that in this area and season it represents a significant...

Pesticides choke pathway for nature to produce nitrogen for crops

...on. "In essence, the agrichemicals are cutting the lines of communication between the host plant and symbiotic bacteria. This is the mechanism by which these chemicals reduce symbiosis and nitrogen fixation." Fox began the project as a doctoral student with John A. McLachlan, director of the Center for ...

U-M researchers discover gene switched off in cancer can be turned on

...says. The researchers targeted lung cancer cell lines in particular, although they found similar results in a variety of other cancer cell lines tested. A potential target to treat lung cancer is particularly crucial as the death rate from lung ...

Mutating the entire genome

...all mouse genes in cell culture and create 900 new lines of mutant mice by 2010 – an effort NIH says “will be extremely useful for the study of human disease.” Simpler, Faster Mutations in the Whole Mouse Genome Existing gene-targeting methods for deleting large segments of DNA are time-consuming ...

AAAS decries latest stem cell veto

...icy limits such funding to fewer than 20 stem cell lines that had been created when the president first announced U.S. policy in 2001. "Our concern is that this action has the potential to delay development of important new therapies by cutting off a promising avenue of research," said Alan I. Leshner, ...

New research shows sharks use their noses and bodies to locate smells

...and in two sensory conditions – with their lateral lines intact or lesioned by streptomycin," explained Gar...based on hair cells. Sharks with their lateral lines intact demonstrated a preference for the odor plume over the seawater plume and, more specifically, ...

'Personality-gene' makes songbirds curious

... of the birds. This is first shown in two breeding lines of great tits, which the researchers had selected over four generations according to their level of curiosity (a low and a high curiosity line). The scientists assessed the curiosity of the birds in a test which shows similarities to the traditional ...

Scientists develope a new model of artificial canine skin

...will allow, therefore, the carrying out of various lines of research related to skin biology and pathology without the need to use live animals. The basic structure of skin consists of an external layer, the epidermis, and an internal layer, the dermis, separated by a basal membrane. A study of the intera...

Spud origin controversy solved

...ductions came from Chile. While there are multiple lines of evidence to support each theory, the Andean introduction hypothesis stems from the belief that the Canary Islands landraces are solely of Andean origin. Although almost all current European potatoes have Chilean traits, the Andean hypothesis suppo...

Gut research yields new anti-cancer approach

...er cells dangerous in the body, but useful as cell lines for study. While comparing PPARgamma activators and inhibitors, Schaefer noted with frustration that her cancer cells were dying before she could complete her experiments. Retracing her steps, she found that she had used too much inhibitor. The t...

Woven scaffolds could improve cartilage repair

..." Cartilage is a type of connective tissue that lines the ends of bones, providing cushioning and a smooth surface for their movement within the joint. Damage to cartilage is difficult to treat, the researchers said, because the tissue lacks a supply of blood, nerve and lymph and has limited capacity fo...

Metacognition: Faced with a test, rats can check their knowledge first

...hereas an incorrect choice yielded nothing. Two lines of evidence from the experiments indicated that rats can judge whether they have enough information to pass the text. First, the researchers observed that the more difficult the time-discrimination task was, the more frequently rats opted to decline ...

Bypassing eggs, flu vaccine grown in insect cells shows promise

...ng business. A similar technology using human cell lines is used to produce the hepatitis B vaccine, while one form of a vaccine against human papilloma virus is made using the same insect cell line used in the JAMA study. In the study conducted by Treanor, together with colleagues at Cincinnati Childre...

Soft-cell approach cuts animal tests

...ion studies. The advantage of using human cell lines and cultures is that the researcher can study toxicity mechanisms at the molecular/cellular level at an earlier stage specifically for individual chemicals, depending on their site of action within the human body without using animals. For example, w...

Research finds music training 'tunes' human auditory system

... Overall, the findings assist in unfolding new lines of inquiry. The researchers now are looking to find ways to "train" the brain to better encode sound ?work that potentially has far-reaching educational and clinical implications. The study was supported by Northwestern University, grants from the Na...

Cold sore virus might play role in Alzheimer's disease

...rms of the human ApoE gene, bring together several lines of research that have pointed toward a possible role for herpes in Alzheimer's disease. Ruth Itzhaki of the University of Manchester has led the way with several studies showing a correlation between herpes and Alzheimer's. She has shown that Alzh...

New protein inhibitor impedes growth of cancerous cells

...I 2536 caused growth arrest and cell death in cell lines derived from a variety of human cancers, and it inhibited the growth of human tumor grafts in mice, resulting in the death of tumor cells and regression of large tumors. The authors report that BI 2536 has now been brought into use in clinical studie...

Fighting to keep Darwin in the classroom

...sm ammunition for our school teachers on the front lines of this ongoing battle. Today, on Darwin's 198th birthday, Springer announces plans for a new journal which will do just that. A father-and-son team—a world-renowned evolutionary biologist and a highly skilled and sophisticated science high school ...

Surgeons develop simpler way to cure atrial fibrillation

...within the jaws of the device, surgeons can create lines of ablation, or scar tissue, on the heart muscle. In the older Cox-maze III procedure, the lines of ablation were made by cutting the heart muscle, sewing the incisions back together and letting a ...

New cell type identified in cancer development

...of the animals had lymphoma, and that several cell lines from those tumors carried a unique and provocative...d out more about them. They selected three pCSC lines and injected them subcutaneously, intraperitoneally or intravenously into three groups of mice. The ...

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