Stress Induces Overeating Behavior in Rhesus Macaques

Devouring junk food in times of anxiety may not be exclusive to college students. In the recent online edition of Physiology and Behavior, Emory University researchers at the Yerkes National Primate Research Center discovered that socially subordinate female rhesus monkeys consume more calorie-rich foods than do their dominant counterparts.

Low Levels of Vitamin D Correlate with Peripheral Artery Disease

A study conducted by a research team at Albert Einstein College of Medicine of Yeshiva University suggests low levels of Vitamin D may increase an individual's risk for peripheral artery disease (PAD). Their findings, presented at American Heart Association's Arteriosclerosis, Thrombosis and Vascular Biology Annual Conference 2008, were derived from an analysis of blood samples collected from 4,839 adults.

New synthesis technique may yield better, cheaper drugs

Pharmaceutical companies may be able to make better drugs with fewer side effects using a new synthesis method recently developed by a Duke University chemist. Don Coltart, assistant professor of chemistry at Duke, has published a paper in the European journal Angewandte Chemie that describes a new way of synthesizing a class of molecules, called ketones, in a way that is faster, cheaper, and more efficient than current methods.

When cannibals attack: the locust story

Locust plagues are indeed spectacular, with millions of insects spontaneously lifting into the air and devouring everything around them. Why so many locusts spontaneously choose to migrate has always been a mystery. The Bible tells how God once caused an enormous plague of locusts to descend upon Egypt, destroying everything in their path. More recently, a team of scientists has found another, somewhat less divine, reason for the movement of these insects.

Martial Art Improves Sleep of Elderly

UCLA researchers will soon publish a study in the journal Sleep that contains support for the practice of tai chi chih among the elderly to improve sleep quality. The study involved the sleep habits of two elderly groups – one which attended health education courses and another which participated in tai chi chih. Members of the latter group reported a decrease in sleep-related problems, a hardship that plagues many seniors.

Arctic Drives the Need for POP Identification

Persistent organic pollutants (POP) have now entered into the Artic ecosystem as well. Birds and mammals in the Arctic are now showing high levels of contamination of POPs that has alarmed the researchers and scientists to look at POPs seriously. Though the Stockholm convention urged to identify POPs, only few among thousands of chemicals are assessed.

Are doctors inhumane?

"I swear by Apollo Physician, by Askelpios, by Health, by panacea and by all the gods and goddesses, making them witnesses that I will carry out, according to my ability and judgment, this oath and this indenture. I will use treatment to help the sick according to my ability and judgment, but I will never use it to injure or wrong them." We all remember these lines as a part of Hippocrates oath – the principles we vowed to follow in our medical practice. But now I feel its time we look back and ask ourselves, are we really following them? If yes, then every now and then, why do we get to hear: "Petition filed against doctor for negligence", "Dispute between doctors and patients", "Doctors going inhumane". So, the question here is "Are the doctors becoming inhumane?"

The Identification of Chemicals using Clustering and Extrapolation From an External Database for Electronic Nose Sensors

The Identification of Chemicals using Clustering and Extrapolation From an External Database for Electronic Nose Sensors

lectronic noses, small electronic instruments with carbon sensing films, provide an artificial version of our olfactory system. In conjunction with pattern recognition techniques, electronic noses can be used to identify odor combinations, perform rudimentary perceptual analysis, and classify unknown odors. Although many different algorithms, from statistical analysis to biologically-inspired neural networks, have been implemented as e-nose pattern recognition techniques, no perfect algorithm has been found. This paper explores the creation and implementation of a novel identification system that uses an outside database to extrapolate the identity of an unknown odor.

Computer Modeling of Physiological Conditions for Better Understanding of Intracranial Blood Pressure and Brain Vasculature

Computer Modeling of Physiological Conditions for Better Understanding of Intracranial Blood Pressure and Brain Vasculature

Millions of people suffer from various diseases of the central nervous system such as stroke, Parkinson's disease, Alzheimer's disease, and hydrocephalus. To improve the treatment options available, a better understanding of the intracranial dynamics is required. The understanding of intracranial dynamics leads to quantification of fluid flow, cerebrospinal blood pressure, and extension of brain vasculature during the cardiac cycle. One such quantification method, used to simulate the physiological conditions in the brain, is the computer program MATLAB, and one proposed approach is using a "compartmental" model, where arteries, veins, choroids plexus, and other areas and vessels in the brain are lumped as compartments to simulate the intracranial dynamics under normal and hydrocephalic conditions.

Bio-Transfer and Metabolism in the Distributed System Under Uncertainty

Bio-Transfer and Metabolism in the Distributed System Under Uncertainty

Understanding the transport and metabolism of 3,4-dihydroxy-L-phenylalanine (L-dopa) in the human brain is necessary to better treat people with Parkinson's disease. This disease is caused by an insufficient amount of dopamine (DA) produced in the brain. Positron emission tomography (PET) imaging has been used to study the activity of the dopamine producing enzyme, aromatic amino acid decarboxylase (dopa decarboxylase), in conjunction with a radio labeled analog of L-dopa, 6-[18F]fluoro-L-dopa or F-dopa. In this paper, using reaction coefficients calculated by Gjedde from PET scans, a set of differential equations representing the mass balance of all the reactions and diffusion from L-dopa to dopamine in the blood and brain was created.