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130,288 articles from ScienceDaily

Heat Stress Influences Low Conception Of Dairy Herds

Summer heat stress is a main factor related to low conception rates in high producing dairy herds in warm areas worldwide. A research group studied the impact of several climate variables on conception rates in high producing dairy cows in northeastern Spain by examining 10,964 inseminations.

How Antibodies Fight HIV: New Evidence

Scientists have uncovered the first evidence that an HIV antibody is most effective when it binds not only to the virus, but also to host immune cells. The findings suggest that antibody efficiency depends on both directly neutralizing the virus and activating the host immune response.

Human-Animal Hybrid Embryos Approved For Research In Britain

The Human Fertilisation and Embryo Authority, the body which oversees human embryo research in Britain, has approved the creation of part-human, part-animal hybrid embryos for research purposes. The Authority decided that there is no fundamental reason to prevent cytoplasmic hybrid research, according to their statement.

Large Asteroid Breakup May Have Caused Mass Extinction On Earth 65 Million Years Ago

The impactor believed to have wiped out the dinosaurs and other life forms on Earth some 65 million years ago has been traced back to a breakup event in the main asteroid belt. A joint U.S.-Czech team from Southwest Research Institute (SwRI) and Charles University in Prague suggests that the parent object of asteroid (298) Baptistina disrupted when it was hit by another large asteroid, creating...

Mouse Model Of Autism Spectrum Disorders Developed

Researchers have genetically engineered mice that harbor the same genetic mutation found in some people with autism and Asperger syndrome. Mice with this mutation show a similar type of social impairment and cognitive enhancement as the type seen in some people with autism spectrum disorders (ASDs). ASDs are enigmatic cognitive disorders that impair a patient's social interactions, but do not...

New Drug Paradigm: Liquid Crystal Pharmaceuticals

An innovative liquid crystal technology that offers the promise of new drugs which may more effectively manage cancer and other diseases has been developed. The most recent research involving Liquid Crystal Pharmaceuticals has yielded a new investigational anti-tumor drug called Tolecine™, a compound that also has antiviral and antibacterial applications. It has been shown to be even more...

New Insight Into How Antibiotics Kill Might Make Them Deadlier

Scientists have what could be some very bad news for disease-causing bacteria. All three major classes of antibiotics that kill infectious bacteria do so in part by ramping up the production of harmful free radicals, researchers report. Because those different types of antibiotics each initially hit different targets, it had been believed they worked by independent means.

Pain Patients At Risk For Sleep Apnea

Sleep-disordered breathing was common when chronic pain patients took prescribed opioids. A direct dose-response relationship was found between central sleep apnea and methadone and benzodiazepines, an association which had not been previously reported.

Parenting Help For Bipolar Mums And Dads

Parents with bipolar disorder are taking part in a study that will give them the chance to follow a highly successful parenting skills program. Recent research suggests that children of parents with bipolar disorder are at increased risk of behavioural and emotional disturbance, which are risk factors both for their own development and for parental mental health.

Pregnancy May Increase The Risk Of Developing Binge Eating Disorder

Pregnancy may open a window of vulnerability for developing binge eating disorder, especially for women from lower socioeconomic situations, according to a new study. In a long-term study of 100,000 pregnant Norwegian women, the researchers saw an unexpected increase in new incidences of binge eating disorder that began during pregnancy. The research is the largest population-based study of eating...

Preventing Variceal Bleeding

Beta blockers should be the first line of prevention against variceal bleeding in patients with cirrhosis and portal hypertension. While banding is similarly effective in reducing the incidence of such bleeding, it can have fatal complications and is more expensive. Patients with liver disease often develop portal hypertension from a blockage in the blood flow through the liver.

Primates Expect Others To Act Rationally

Researchers have found that when understanding behavior, primates assume rationality and make inferences based on environmental restraints. The researchers studied over 120 primates from the three major groups of primates, and found the same responses among all three types.

Schizophrenia-linked Gene Keeps New Adult Brain Cells Under Control

A gene with reported links to schizophrenia and other mood disorders plays a broader role in the brain than scientists had previously suspected. The study reveals that the gene, known as Disrupted-In-Schizophrenia 1, directs the incorporation of new neurons into the adult brain and keeps the process under control. The gene's newly discovered roles might help to explain why schizophrenia's symptoms...

Scientists Harvest Answers From Genome Of Grain Fungus

Evil forces thrive in an unstable environment. At least, that's the picture being painted in the first waves of data being reaped from the genome sequence of the fungal plant pathogen, Fusarium graminearum. The sequencing has provided scientists a road map to someday combat a fungus that infects wheat and barley crops, rendering them unusable.

Skin As A Living Coloring Book

The pigment melanin, which is responsible for skin and hair color in mammals, is produced in specialized cells called melanocytes and then distributed to other cells. But not every cell in the complex layers of skin becomes pigmented. The question of how melanin is delivered to appropriate locations may have been answered by a new study.

Virus Connected With Colony Collapse Disorder In Bees

Scientists have found a significant connection between the Israeli Acute Paralysis Virus (IAPV) and Colony Collapse Disorder (CCD) in honey bees. The findings, an important step in addressing the disorder that is decimating bee colonies across the country.

Vocal Cord Dysfunction May Be Caused By Work

Researchers have diagnosed two patients affected with vocal cord dysfunction, which causes coughing and difficulty in breathing due to irritating agents that are breathed in at the workplace. Until now, medical literature had only described two cases of patients with occupational vocal dysfunction.

Beer's On Tap For Binge Drinkers

Beer is the beverage of choice for most adult binge drinkers, according to a new study from the Centers for Disease Control and Prevention. The beverage preferences of excessive drinkers are important to public health because binge drinking is a common problem in the United States and because binge drinkers -- and those around them -- are especially vulnerable to alcohol-related problems, said one...