نتایج جستجو برای: 2525
تعداد نتایج: 257 فیلتر نتایج به سال:
Address correspondence to: Cristina Palacios, PhD Nutrition Program, Graduate School of Public Health Medical Sciences Campus University of Puerto Rico, PO Box 365067, San Juan Puetro Rico 00936-5067. Tel: (787) 758-2525 Ext 1460 • Fax: (787) 759-6719 • Email: [email protected] Objective: Obesity is a public health problem in Puerto Rico. Dietary patterns that include high intakes of en...
BACKGROUND In February 2004, students from a college in Iowa, with a high proportion of nonmedical exemptions to vaccination, traveled to India; one fourth of the students contracted measles while there. One exposed, susceptible student returned home during his infectious period, necessitating 2 months of containment efforts in Iowa. OBJECTIVE The objective of this study was to measure the di...
Natural selection increases inherited information about environmental challenge. Against selection, imperfect transmission reduces inherited information. Many problems in biology come down to understanding the relative balance between selection and imperfect transmission. A clear understanding of selection and transmission requires greater precision with regard to abstract notions such as inher...
We present the results of detailed analysis of pointed X-ray observations by RXTE PCA/HEXTE of the black hole X-ray binary (BHXRB) system V4641 Sgr (= SAX J1819.3-2525) during its outburst of August 2003. Soft X-ray (3-20 keV) flux variations by factors of 10 or more on timescales of minutes or shorter were seen. The rapid and strong variability of this source sets it apart from typical XRBs. I...
Unbundling presumptions of DSL standards groups are reviewed and contrasted with their respective counterparts in cable broadband access. This comparison evaluates the ultimate DSL network architecture under those presumptions as fiber penetrates further into the existing loop plant. The results of the evaluation then raise questions as to the future emphasis and focus of advanced DSL spectrum ...
Address correspondence to: Ilia Oquendo-Jiménez, PhD, School of PharmacyMedical Sciences Campus, University of Puerto Rico, P.O. Box 365067, San Juan, PR 00936-5067. Tel: (787) 758-2525 Ext. 5437 • Fax (787) 767-2796 • Email: ilia. [email protected] Background: Alzheimer’s disease (AD) is the most common form of dementia worldwide. In Hispanic populations there are few validated tests for the acc...
OBJECTIVE We investigated associations between maternal cigarette smoking during the first trimester and the risk of congenital heart defects (CHDs) among the infants. METHODS The Baltimore-Washington Infant Study was the first population-based case-control study of CHDs conducted in the United States. Case and control infants were enrolled during the period 1981-1989. We excluded mothers wit...
PURPOSE The purpose of this study was to perform a reference case, cost-utility analysis of initial cataract surgery using the current literature on cataract outcomes and complications. DESIGN Computer-based econometric modeling. METHODS Visual acuity data of patients treated and observed over a 4-month postoperative period was obtained from the US National Cataract Patient Outcomes Researc...
Data from animal, clinical, and prevention studies support the role of androgen in prostate cancer growth, proliferation, and progression. However, results serumbased epidemiologic studies in humans have been inconclusive. Part of the inconsistency in these findings stems from differences in study population, assay accuracy, intraperson variation, and limited sample size. Recently, data from a ...
Hiroshi Tomimatsu*, Takehiro Sasaki, Hiroko Kurokawa, Jon R. Bridle, Colin Fontaine, Jun Kitano, Daniel B. Stouffer, Mark Vellend, T. Martijn Bezemer, Tadashi Fukami, Elizabeth A. Hadly, Marcel G.A. van der Heijden, Masakado Kawata, Sonia K! efi, Nathan J.B. Kraft, Kevin S. McCann, Peter J. Mumby, Tohru Nakashizuka, Owen L. Petchey, Tamara N. Romanuk, Katharine N. Suding, Gaku Takimoto, Jotaro ...
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