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At Specific Signal Threshold, Cancer Cells Revert To Normal

Categorie : Biology / Biochemistry
Cancer starts when key cellular signals run amok, driving uncontrolled cell growth. But scientists at the Stanford University School of Medicine report that lowering levels of one cancer signal under a specific threshold reverses this process in mice, returning tumor cells to their normal, healthy s ...

read more Cancer starts when key cellular signals run amok, driving uncontrolled cell growth. But scientists at the Stanford University School of Medicine report that lowering levels of one cancer signal under a specific threshold reverses this process in mice, returning tumor cells to their normal, healthy s read more Wed Jul 2008 Wed Jul 2008

Medical Diagnostics Could Be Revolutionized By New Electrostatic-Based DNA Microarray Technique

Categorie : Biology / Biochemistry
The dream of personalized medicine - in which diagnostics, risk predictions and treatment decisions are based on a patient's genetic profile - may be on the verge of being expanded beyond the wealthiest of nations with state-of-the-art clinics. A team of researchers with the U.S. ...

read more The dream of personalized medicine - in which diagnostics, risk predictions and treatment decisions are based on a patient's genetic profile - may be on the verge of being expanded beyond the wealthiest of nations with state-of-the-art clinics. A team of researchers with the U.S. read more Wed Jul 2008 Wed Jul 2008

Supercomputer Used To Track Pathways In Myoglobin

Categorie : Biology / Biochemistry
Some 50 years ago, after decades of effort, John Kendrew determined the structure of the small globular protein, myoglobin, which is responsible for oxygen storage in cells. For this discovery, he shared the Nobel Prize in chemistry with Max Perutz, who did similar work on hemoglobin. ...

read more Some 50 years ago, after decades of effort, John Kendrew determined the structure of the small globular protein, myoglobin, which is responsible for oxygen storage in cells. For this discovery, he shared the Nobel Prize in chemistry with Max Perutz, who did similar work on hemoglobin. read more Wed Jul 2008 Wed Jul 2008

Tugging At Molecules With Optical Tweezers

Categorie : Biology / Biochemistry
MIT researchers have developed a novel technique to measure the strength of the bonds between two protein molecules important in cell machinery: Gently tugging them apart with light beams. ...

read more MIT researchers have developed a novel technique to measure the strength of the bonds between two protein molecules important in cell machinery: Gently tugging them apart with light beams. read more Wed Jul 2008 Wed Jul 2008

Reducing The Carbon "Hoofprint" Of Cows

Categorie : Biology / Biochemistry
Milk goes green: Cows that receive recombinant Bovine Somatotropin (rbST) make more milk, all the while easing natural resource pressure and substantially reducing environmental impact, according to a Cornell University study to be published in the Proceedings of the National Academy of Sciences (Ju ...

read more Milk goes green: Cows that receive recombinant Bovine Somatotropin (rbST) make more milk, all the while easing natural resource pressure and substantially reducing environmental impact, according to a Cornell University study to be published in the Proceedings of the National Academy of Sciences (Ju read more Wed Jul 2008 Wed Jul 2008

Researchers Are First To Simulate The Binding Of Molecules To A Protein

Categorie : Biology / Biochemistry
You may not know what it is, but you burn more than your body weight of it every day. Adenosine triphosphate (ATP), a tiny molecule that packs a powerful punch, is the primary energy source for most of your cellular functions. Now researchers at the University of Illinois have identified a key st ...

read more You may not know what it is, but you burn more than your body weight of it every day. Adenosine triphosphate (ATP), a tiny molecule that packs a powerful punch, is the primary energy source for most of your cellular functions. Now researchers at the University of Illinois have identified a key st read more Wed Jul 2008 Wed Jul 2008

Cellular Self-Eating Promotes Pancreatitis

Categorie : Biology / Biochemistry
To survive tough times, cells sometimes resort to a form of self-cannibalism called autophagy. But as Hashimoto et al. reveal, autophagy can have a down side, destroying the pancreas by prematurely activating a digestive enzyme. In autophagy, a vesicle swallows a portion of cytoplasm and ferries ...

read more To survive tough times, cells sometimes resort to a form of self-cannibalism called autophagy. But as Hashimoto et al. reveal, autophagy can have a down side, destroying the pancreas by prematurely activating a digestive enzyme. In autophagy, a vesicle swallows a portion of cytoplasm and ferries read more Wed Jul 2008 Wed Jul 2008

Egg Colour Mimicry In The Common Cuckoo Cuculus Canorus As Revealed By Modelling Host Retinal Function

Categorie : Biology / Biochemistry
Do cuckoos effectively mimic their hosts? Here it is assessed from a host perspective whether the colour design of cuckoo eggs of different races maximizes matching for two favourite avian hosts. Secondly, it is assessed the role of nest luminosity on host perception of matching. ...

read more Do cuckoos effectively mimic their hosts? Here it is assessed from a host perspective whether the colour design of cuckoo eggs of different races maximizes matching for two favourite avian hosts. Secondly, it is assessed the role of nest luminosity on host perception of matching. read more Wed Jul 2008 Wed Jul 2008

Functional Group Diversity Of Bee Pollinators Increases Crop Yield

Categorie : Biology / Biochemistry
In a study on the functional role of biodiversity in tropical agroforestry systems, we found that pollinator diversity, but not abundance, was positively related to seed set of pumpkin. Furthermore, we classified species due to differences in spatiotemporal resource use and within-flower behaviour i ...

read more In a study on the functional role of biodiversity in tropical agroforestry systems, we found that pollinator diversity, but not abundance, was positively related to seed set of pumpkin. Furthermore, we classified species due to differences in spatiotemporal resource use and within-flower behaviour i read more Wed Jul 2008 Wed Jul 2008

Fish Odour Triggers Conspecific Attraction Behavior In An Aquatic Invertebrate

Categorie : Biology / Biochemistry
Group living has evolved as an adaptation to predation in many animal species. In a multitude of vertebrates, the tendency to aggregate varies with the risk of predation, but experimental evidence for this is less well known in invertebrates. Here, we examine the tendency to aggregate in the freshwa ...

read more Group living has evolved as an adaptation to predation in many animal species. In a multitude of vertebrates, the tendency to aggregate varies with the risk of predation, but experimental evidence for this is less well known in invertebrates. Here, we examine the tendency to aggregate in the freshwa read more Wed Jul 2008 Wed Jul 2008

Female Bushcrickets Fuel Their Metabolism With Male Nuptial Gifts

Categorie : Biology / Biochemistry
In some animals, such as bushcrickets, males donate a nutritious gift to a potential mate, and females ingest this so-called nuptial gift during copulation. Previously it was thought that most nuptial gift nutrients are routed to egg production. But, recent studies with isotopically labeled nuptial ...

read more In some animals, such as bushcrickets, males donate a nutritious gift to a potential mate, and females ingest this so-called nuptial gift during copulation. Previously it was thought that most nuptial gift nutrients are routed to egg production. But, recent studies with isotopically labeled nuptial read more Wed Jul 2008 Wed Jul 2008

Predicting The Fate Of A Living Fossil: How Will Global Warming Affect Sex Determination And Hatching Phenology In Tuatara?

Categorie : Biology / Biochemistry
Climate warming will affect animals in many ways, including the sex of some species' offspring. For tuatara, unique and ancient reptiles from New Zealand, warmer nest temperatures produce male-biased clutches. We predicted sex ratios and hatching times of tuatara clutches under future climate scenar ...

read more Climate warming will affect animals in many ways, including the sex of some species' offspring. For tuatara, unique and ancient reptiles from New Zealand, warmer nest temperatures produce male-biased clutches. We predicted sex ratios and hatching times of tuatara clutches under future climate scenar read more Wed Jul 2008 Wed Jul 2008

Thermo Fisher Scientific Has A PCR Plate To Suit All Major Thermal Cyclers

Categorie : Biology / Biochemistry
Thermo Fisher Scientific Inc., the world leader in serving science, believes it has a Thermo Scientific ABgene® PCR plate to fit every major thermal cycler available. This offers the same reliable, reproducible performance in PCR and QPCR applications no matter what cycler is used. Laboratories usin ...

read more Thermo Fisher Scientific Inc., the world leader in serving science, believes it has a Thermo Scientific ABgene® PCR plate to fit every major thermal cycler available. This offers the same reliable, reproducible performance in PCR and QPCR applications no matter what cycler is used. Laboratories usin read more Wed Jul 2008 Wed Jul 2008

Integration Of Joint Replacements Improved By Coating Titanium With Polymer

Categorie : Biology / Biochemistry
Research at the Georgia Institute of Technology shows that coating a titanium implant with a new biologically inspired material enhances tissue healing, improves bone growth around the implant and strengthens the attachment and integration of the implant to the bone. ...

read more Research at the Georgia Institute of Technology shows that coating a titanium implant with a new biologically inspired material enhances tissue healing, improves bone growth around the implant and strengthens the attachment and integration of the implant to the bone. read more Wed Jul 2008 Wed Jul 2008

Inbreeding And Amphibian Malformations

Categorie : Biology / Biochemistry
We captured 687 adult and 1259 larval tiger salamanders (Ambystoma tigrinum), assessed individuals for gross malformations, and surveyed genetic variation among malformed and normal individuals using both cytoplasmic and nuclear markers. The overall frequency of adults with malformations was 0. ...

read more We captured 687 adult and 1259 larval tiger salamanders (Ambystoma tigrinum), assessed individuals for gross malformations, and surveyed genetic variation among malformed and normal individuals using both cytoplasmic and nuclear markers. The overall frequency of adults with malformations was 0. read more Wed Jul 2008 Wed Jul 2008

Selection On Personality In A Songbird Affects Maternal Hormone Levels Tuned To Its Effect On Timing Of Reproduction

Categorie : Biology / Biochemistry
In birds, as in humans, mothers modulate offspring development by maternal hormones. We found in a wild bird species differences in testosterone within and between clutches of mothers selected for distinct personalities. Selection also affected timing of reproduction, allowing hormone mediated adjus ...

read more In birds, as in humans, mothers modulate offspring development by maternal hormones. We found in a wild bird species differences in testosterone within and between clutches of mothers selected for distinct personalities. Selection also affected timing of reproduction, allowing hormone mediated adjus read more Wed Jul 2008 Wed Jul 2008

Stiffness Gradients In Vascular Bundles Of Palm Trees

Categorie : Biology / Biochemistry
In palm trees, stiff fibres are embedded in soft surrounding tissue. The design of the interface of these tissues is crucial for the functioning of the stem. Mechanical, structural and biochemical investigations with high spatial resolution showed that independent sources acting together at differen ...

read more In palm trees, stiff fibres are embedded in soft surrounding tissue. The design of the interface of these tissues is crucial for the functioning of the stem. Mechanical, structural and biochemical investigations with high spatial resolution showed that independent sources acting together at differen read more Wed Jul 2008 Wed Jul 2008

The Modeling Of Avian Visual Perception Predicts Behavioural Rejection Responses To Foreign Egg Colours

Categorie : Biology / Biochemistry
How do birds tell the colours of their own and foreign eggs apart? We evaluate a model of avian physiological visual acuity to determine its accuracy as a predictor of song thrush Turdus philomelos discriminating artificial eggs and rejecting them from her clutch. We show that the large degree of va ...

read more How do birds tell the colours of their own and foreign eggs apart? We evaluate a model of avian physiological visual acuity to determine its accuracy as a predictor of song thrush Turdus philomelos discriminating artificial eggs and rejecting them from her clutch. We show that the large degree of va read more Wed Jul 2008 Wed Jul 2008

Web Helps Recruit And Radicalise Supporters Of Terrorism

Categorie : Bio-terrorism / Terrorism
Terrorist organisations are using the internet increasingly to recruit and radicalise potential supporters. This is the finding of Dr Lorraine Grieve from Leeds Trinity and All Saint's University College who presented her findings on Thursday 26 June 2008 at the British Psychological Society's Div ...

read more Terrorist organisations are using the internet increasingly to recruit and radicalise potential supporters. This is the finding of Dr Lorraine Grieve from Leeds Trinity and All Saint's University College who presented her findings on Thursday 26 June 2008 at the British Psychological Society's Div read more Wed Jul 2008 Wed Jul 2008

Avalanche Photodiodes Target Bioterrorism Agents

Categorie : Bio-terrorism / Terrorism
Researchers have shown that a new class of ultraviolet photodiode could help meet the U.S. military's pressing requirement for compact, reliable and cost-effective sensors to detect anthrax and other bioterrorism agents in the air. ...

read more Researchers have shown that a new class of ultraviolet photodiode could help meet the U.S. military's pressing requirement for compact, reliable and cost-effective sensors to detect anthrax and other bioterrorism agents in the air. read more Wed Jul 2008 Wed Jul 2008

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