نتایج جستجو برای: conversion rates

تعداد نتایج: 542671  

Journal: :Infection Control & Hospital Epidemiology 1994

Journal: :Evolution; international journal of organic evolution 2017
Lesley A Alton Catriona Condon Craig R White Michael J Angilletta

The effect of temperature on the evolution of metabolism has been the subject of debate for a century; however, no consistent patterns have emerged from comparisons of metabolic rate within and among species living at different temperatures. We used experimental evolution to determine how metabolism evolves in populations of Drosophila melanogaster exposed to one of three selective treatments: ...

Journal: :Remote Sensing 2017
Tyson Carswell Maycira Costa Erika Young Nicholas Komick Jim Gower Ruston Sweeting

There is an increasing need for satellite-derived accurate chlorophyll-a concentration (chla) products to improve fisheries management in coastal regions. However, the methods used to derive these products have to be evaluated, so the associated uncertainties are known. The performance of three atmospheric correction methods, the near infrared (NIR), the shortwave infrared (SWIR), and the Manag...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

growing demands and requires of high data rate systems cause significant increase of high frequency systems for wideband communication applications. as mixers are one of the main blocks of each receivers and its performance has great impact on receiver’s performance; in this thesis, a new solution for ku-band (12-18 ghz) mixer design in tsmc 0.18 µm is presented. this mixer has high linearity a...

Journal: :Genetics 2009
Casey L McGrath Claudio Casola Matthew W Hahn

Gene conversion between duplicated genes has been implicated in homogenization of gene families and reassortment of variation among paralogs. If conversion is common, this process could lead to errors in gene tree inference and subsequent overestimation of rates of gene duplication. After performing simulations to assess our power to detect gene conversion events, we determined rates of convers...

2013
Ichiro Kurane Ken-ichi Shibasaki Akira Kotaki Yasuaki Hijioka Tomohiko Takasaki

Japanese encephalitis (JE) is one of the most important mosquito-borne viral diseases in Asia. Pigs are a natural host and the amplifier of JE virus. The sero-conversion rate to JE virus in sentinel pigs reflects the activity of JE virus in the region. We analyzed whether precipitation has any effect on the sero-conversion rate to JE virus in sentinel pigs. Linear regression analysis was perfor...

Journal: :international journal of preventive medicine 0
masoud etemadifar mohsen janghorbani mohammad mehdi koushki fatemeh etemadifar mahboobeh fereidan esfahani

background: the aim of this study was to estimate the conversion rate from radiologically isolated syndrome (ris) to definite multiple sclerosis (ms). methods: during a mean (standard deviation [sd]) follow-up period of 17.4 (5.4) (range 8-29) months, 25 subjects with ris and without neurological symptom aged 22-45 year from a single-center have been examined for the occurrence of definite ms. ...

Journal: :The British journal of psychiatry : the journal of mental science 2006
Anja Busse Matthias C Angermeyer Steffi G Riedel-Heller

BACKGROUND Studies of conversion from mild cognitive impairment to dementia suggest a linear progression over time. Conversion rates during lifetime may extend to 80-90%. AIMS This study examines the time-dependent evolution from mild cognitive impairment to dementia. Current assumptions regarding yearly and lifetime conversion rates are challenged. METHOD A community sample of 1045 dementi...

2009
R Dennis

the population over 80 years old undergoing laparoscopic cholecystectomy may have morbidity rates of 2.2-24% and mortality rates of up to 2.8%.3-7 The potential benefits of laparoscopic surgery may be lost if conversion to an open operation is necessary. If not unduly delayed, conversion carries similar risks to open cholecystectomy, whereas ‘enforced’ conversion usually following severe iatrog...

Journal: :iranian j. of fisheries science 2014
s bilen u önal u önal u önal u önal

in this study, the effects of oxygen supplementation in different stocking densities of rainbow trout (oncorhynchus mykiss) on the specific growth rates (sgr), feed conversion ratios (fcr) and survival rates were investigated in a commercial-scale culture system. high density cultures were maintained in a total of nine (12 m3) flow-through systems supplemented with o2. initial stocking rates fo...

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