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排序方式: 共有187条查询结果,搜索用时 15 毫秒
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Reiner Bonde 《American Journal of Potato Research》1942,19(7):131-133
126.
Mirsafaei Liaosadat Reiner Željko Shafabakhsh Rana Asemi Zatollah 《Plant foods for human nutrition (Dordrecht, Netherlands)》2020,75(3):307-315
Plant Foods for Human Nutrition - Cardiovascular disease (CVD) is a worldwide health problem with growing up rates of mortality and morbidity. Many risk factors, including high blood pressure,... 相似文献
127.
Encystation and expression of cyst antigens by Giardia lamblia in vitro 总被引:20,自引:0,他引:20
F D Gillin D S Reiner M J Gault H Douglas S Das A Wunderlich J F Sauch 《Science (New York, N.Y.)》1987,235(4792):1040-1043
The cyst form of Giardia lamblia is responsible for transmission of giardiasis, a common waterborne intestinal disease. In these studies, encystation of Giardia lamblia in vitro was demonstrated by morphologic, immunologic, and biochemical criteria. In the suckling mouse model, the jejunum was shown to be a major site of encystation of the parasite. Small intestinal factors were therefore tested as stimuli of encystation. An antiserum that reacted with cysts, but not with cultured trophozoites was raised in rabbits and used as a sensitive probe for differentiation in vitro. Cultured trophozoites that were exposed to bile salts showed a more than 20-fold increase in the number of oval, refractile cells that reacted strongly with anticyst antibodies, and in the expression of major cyst antigens. Exposure to primary bile salts resulted in higher levels of encystation than exposure to secondary bile salts. These studies will aid in understanding the differentiation of an important protozoan pathogen. 相似文献
128.
Sebastian Weller David Kraus Klaus Butterbach‐Bahl Reiner Wassmann Agnes Tirol‐Padre Ralf Kiese 《植物养料与土壤学杂志》2015,178(5):755-767
Methane (CH4) emissions from rice paddies often show significant diurnal variations, most likely driven by diurnal changes of radiation and temperature in air, floodwater, and soil. Field measurements, however, are often scheduled at a fixed time of a given measuring day, thereby neglecting sub‐daily variations of CH4 emissions. Here we evaluated diurnal patterns of CH4 emissions from traditional paddy rice production as observed during field measurements in the Philippines. Field emissions were measured during three consecutive cropping seasons using an automated chamber and gas sampling system with fluxes being obtained every 4 h. Methane fluxes were monitored with a total of nine chambers during the dry seasons in 2012 and 2013 and 27 chambers during the wet season in 2012. Significant and consistent diurnal patterns of CH4 emissions were mainly observed from the start of field flooding until the middle of cropping periods, i.e., periods with low leaf area of the rice crop. Our data show that disregarding the diurnal variability of fluxes results in an average overestimation of seasonal CH4 emissions of 22% (16–31%) if measurements were conducted only around noon. Scheduling manual sampling either at early morning (7:00–9:00) or evening (17:00–19:00) results in estimations of seasonal emissions within 94–101% of the “true” value as calculated from multiple daily flux measurements. Alternatively, uncertainties of seasonal emissions can be reduced to an average of ≤3% by applying sinus function or Gauss function‐based correction factors. Application of correction factors allows the performance of flux measurements at any time of day. We also investigated N2O emissions from rice paddies with respect to diurnal variations, but did not find, as in the case of CH4, any significant and persistent diurnal pattern. 相似文献
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Morrison HG McArthur AG Gillin FD Aley SB Adam RD Olsen GJ Best AA Cande WZ Chen F Cipriano MJ Davids BJ Dawson SC Elmendorf HG Hehl AB Holder ME Huse SM Kim UU Lasek-Nesselquist E Manning G Nigam A Nixon JE Palm D Passamaneck NE Prabhu A Reich CI Reiner DS Samuelson J Svard SG Sogin ML 《Science (New York, N.Y.)》2007,317(5846):1921-1926