Polybutadiene and a co poly mer consisting of 76.5 percent butadiene and 23 .5 percent of styrene were investigated as to t he rates of t heir t hermal degradation . The ra tes for polybu tadiene indicated an act iv:ttion energy of 60 kilocalories per mole. The copolym er had very high init ial rates of degradation, followed by a rapid cirop, so t hat it wa~ not possible to obtain a reliab le a...

PURPOSE Myelodysplastic syndrome (MDS) is rarely seen in patients younger than 50 years, but rapidly increases with advancing age. Data on MDS biology in young patients are yet scarce but more than necessary. The purpose of this study was to estimate the proportion of MDS patients <50 years of age and to compare the clinicopathological data between younger and older patients. METHODS Of our t...

PURPOSE Communicating the diagnosis of psychogenic nonepileptic seizures (PNES) is a challenging task. This study was carried out to assess the acceptability and effectiveness of a new communication procedure consisting of a patient information leaflet and a communication strategy for neurologists. METHODS In a multicenter prospective study, 50 patients newly diagnosed with PNES were informed...

According to WHO, while 50 percent of global health research and development (R&D) in 1992 was undertaken by private industry, less than 5 percent of that was spent on diseases specific to less developed countries (LDCs). Despite this, private industry has produced major drug discoveries and developments for serious LDC disease threats, including malaria, TB, hepatitis B, river blindness, menin...

r&d; is one of the most important and suitable strategies government’s policies for increasing of agricultural production and supply. in this study, in addition of economic evaluation of agricultural r&d; and determination of its rate of return, optimal iran’s agricultural r&d; expenditure is determined. so, in this article, ex-post and ex-ante evaluation by using of mathematical programming ap...

IL LU ST R A TI O N B Y K A R EN W O O Like it or not, our patients are using complementary and alternative medicine (CAM). Studies show that CAM is the fastest growing area in health care today. In 1997, an estimated 42 percent of the U.S. population used some form of alternative therapy.1 The numbers are even higher in family practice settings: One study found that 50 percent of patients were...

Few studies have examined the correlation between change in carotid artery intima-media thickness (IMT) and change in coronary artery disease. In the Cholesterol Lowering Atherosclerosis Study, current nonsmoking men with coronary artery disease were randomized to colestipol-niacin or placebo. Among 133 subjects with baseline and on-trial coronary angiography and carotid ultrasonography, colest...