نتایج جستجو برای: 18 percent to 30 percent decrease thus
تعداد نتایج: 10801585 فیلتر نتایج به سال:
BACKGROUND Screening for aneuploid pregnancies is routinely performed after 15 weeks of gestation and has a sensitivity of approximately 65 percent, with a false positive rate of 5 percent. First-trimester markers of aneuploidy have been developed, but their use in combination has not been adequately evaluated in clinical practice. METHODS We conducted a multicenter study of screening for tri...
This study assesses five common explanations for the large decline in U.S. total factor productivity (TFP) during the Great Depression: changes in capacity utilization, factor input quality, and production composition; labor hoarding; and increasing returns to scale. The study finds that these factors explain less than onethird of the 18 percent TFP decline between 1929 and 1933. The rest of th...
BACKGROUND Most renal transplants fail because of chronic allograft nephropathy or because the recipient dies, but no reliable factor predicting long-term outcome has been identified. We tested whether a renal arterial resistance index of less than 80 was predictive of long-term allograft survival. METHODS The renal segmental arterial resistance index (the percentage reduction of the end-dias...
to study the possible use of phytase and yeast (saccharomyces cervisiae) in corn-soy bean meal base diet with different levels of available phosphorous in arbor acers broiler chicks, an experiment was conducted with 264 day old chicks of an average weight of 44.6 grams each. a completely randomized design of 6 treatments and 4 replications (11 chicks per replicate) for periods of starter, growe...
To determine if paced cycle length-dependent changes in the QRS duration correlate with the change in ventricular tachycardia (VT) cycle length after procainamide, we measured the QRS duration during sinus rhythm and during right ventricular pacing before and after procainamide (mean concentration, 9.9 micrograms/ml) in 18 patients with morphologically identical VT induced at both study periods...
Direct solar-to-fuels conversion can be achieved by coupling a photovoltaic device with water-splitting catalysts. We demonstrate that a solar-to-fuels efficiency (SFE) > 10% can be achieved with nonprecious, low-cost, and commercially ready materials. We present a systems design of a modular photovoltaic (PV)-electrochemical device comprising a crystalline silicon PV minimodule and low-cost hy...
The referendum on yesterday’s ballot w h ich recommended the adoption o f a bilateral freeze on nuclear weapons was passed overwhelm ingly by the student body. The final ta lly showed those favor ing the referendum w inn ing by a margin o f 2770, o r 76.9 percent, to 832, o r 231 percent. 53 percent o f the student body voted in the elec tion. people were not really aware o f the issue.” The ...
A fter four years of hardly keeping up with inflation, Indiana cropland values jumped around 10% in the year ending in June 1994 according to the Purdue land values survey. The USDA reported a 7.8% increase for the year ending January 1. Likely causes of strength in the land market include low interest rates (affecting both borrowers and equity investors), generally good yields in Indiana in 19...
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