نتایج جستجو برای: precipitation

تعداد نتایج: 59201  

Journal: :iranian journal of materials forming 2015
g. r. ebrahimi a. momeni h. eskandari

strain induced precipitation in hsla-100 steel was investigated by conducting hotcompression and relaxation tests at temperature range of 850°c to 1100°c and strain rate of 0.001s-1 to 1s-1. the absence of dynamic recrystallization at temperatures below 1000°c was attributedto the influence of dynamic precipitation. the stress relaxation tests showed that strain inducedprecipitation is possible...

Journal: :Global change biology 2017
Alan K Knapp Meghan L Avolio Claus Beier Charles J W Carroll Scott L Collins Jeffrey S Dukes Lauchlan H Fraser Robert J Griffin-Nolan David L Hoover Anke Jentsch Michael E Loik Richard P Phillips Alison K Post Osvaldo E Sala Ingrid J Slette Laura Yahdjian Melinda D Smith

Intensification of the global hydrological cycle, ranging from larger individual precipitation events to more extreme multiyear droughts, has the potential to cause widespread alterations in ecosystem structure and function. With evidence that the incidence of extreme precipitation years (defined statistically from historical precipitation records) is increasing, there is a clear need to identi...

2014
Zhuolin Li Yuting Zhang Dafu Yu Na Zhang Jixiang Lin Jinwei Zhang Jiahong Tang Junfeng Wang Chunsheng Mu

Leymus chinensis is a dominant, rhizomatous perennial C3 species in the grasslands of Songnen Plain of Northern China, and its productivity has decreased year by year. To determine how productivity of this species responds to different precipitation regimes, elevated CO2 and their interaction in future, we measured photosynthetic parameters, along with the accumulation and partitioning of bioma...

2017
Andreas F. Prein Andreas Gobiet

Gridded precipitation data sets are frequently used to evaluate climate models or to remove model output biases. Although precipitation data are error prone due to the high spatio-temporal variability of precipitation and due to considerable measurement errors, relatively few attempts have been made to account for observational uncertainty in model evaluation or in bias correction studies. In t...

2011
KEISUKE ONO SO KAZAMA

The objective of this study is to estimate the daily extreme precipitation distribution in an Asian monsoon region considering orographic precipitation in mountainous areas. For this purpose, the APHRODITE data set and precipitation observations from 150 raingauges throughout Thailand were used as the main input. First, a bias-correction for underestimated precipitation in the APHRODITE data se...

Journal: :Indian journal of psychology 1959
T C APPANNA

The serum protein fractionation has always been a difficulty in routine clinical work. Most of the laboratories employ tedious methods of fractional precipitation with various concentrations of salts to separate albumin from globulin. A simple method of fractionating proteins on filter paper suitable for clinical laboratories has been developed in Germany, the United States and Sweden; Wieland ...

Journal: :Bioanalysis 2015
Daniel Wilffert Rainer Bischoff Nico C van de Merbel

Antibody-free approaches for quantitative LC-MS/MS-based protein bioanalysis are reviewed and critically evaluated, and compared with the more widely used immunoaffinity-based approaches. Antibody-free workflows will be divided into four groups and discussed in the following order: direct analysis of signature peptides after proteolytic digestion; enrichment of target proteins and signature pep...

Journal: :Global change biology 2014
Taehee Hwang Lawrence E Band Chelcy F Miniat Conghe Song Paul V Bolstad James M Vose Jason P Love

Mountain watersheds are primary sources of freshwater, carbon sequestration, and other ecosystem services. There is significant interest in the effects of climate change and variability on these processes over short to long time scales. Much of the impact of hydroclimate variability in forest ecosystems is manifested in vegetation dynamics in space and time. In steep terrain, leaf phenology res...

Journal: :Clinical chemistry 1977
M B Aufrère B Hoener M E Vore

The high-performance liquid-chromatographic method described here for the quantitative analysis for nitrofurantoin in urine and plasma involves direct analysis of urine samples and analysis of plasma samples after protein precipitation by methanol. The assay, which requires only 0.2 ml of biological fluid and shows a linear relationship in the range 0.02 to 200 mg/liter, can be performed in 9 m...

2015
Hong Yan Cunzhu Liang Zhiyong Li Zhongling Liu Bailing Miao Chunguang He Lianxi Sheng

Annuals are an important component part of plant communities in arid and semiarid grassland ecosystems. Although it is well known that precipitation has a significant impact on productivity and species richness of community or perennials, nevertheless, due to lack of measurements, especially long-term experiment data, there is little information on how quantity and patterns of precipitation aff...

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