نتایج جستجو برای: 100101
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Improving the understanding of cropland change and its driving factors is a current focus for policy decision-makers in China. The datasets of cropland and cropland changes from the 1970s to the 2000s were used to explore whether climate change has produced spatiotemporal changes to cropland in northern China since the 1970s. Two representative indicators of heat and water resources, which are ...
INTRODUCTION In mammals, spermatogenesis is a multistep processes, comprising mitotic proliferation of spermatogonia, meiotic division of spermatocytes and maturation of haploid spermatids (Nakanishi and Shiratsuchi, 2004). As spermatids undergo terminal differentiation into spermatozoa, the bulk cytoplasmic contents are segregated into the residual body, which is sloughed off, phagocytosed and...
Mature pollen from most plant species is metabolically quiescent; however, after pollination, it germinates quickly and gives rise to a pollen tube to transport sperms into the embryo sac. Because methods for collecting a large amount of in vitro germinated pollen grains for transcriptomics and proteomics studies from model plants of Arabidopsis and rice are not available, molecular information...
Frank Thonfeld 1,2,*,†, Andreas Rienow 1,3,†, Olena Dubovyk 2,†, Ayman Abdel-Hamid 2, Agatha Akpeokhai 1, Esther Amler 4, Georg Bareth 2,5, Amit Kumar Basukala 6, Morton Canty 2, Manfred Denich 2,6, Tomasz Dobrzeniecki 7, Jessica Ferner 2, Hendrik Flügel 1, Gohar Ghazaryan 2, Ellen Götz 2, Valerie Graw 2, Klaus Greve 2,8, Reginald Guuroh 9, Sascha Heinemann 1, Tobias Henning 1, Konrad Hentze 1,...
International Journal of Modern Physics AVol. 36, No. 11n12, 2102002 (2021) No AccessTaiji program in space for gravitational universe with the first run key technologies test Taiji-1The Taiji Scientific Collaboration, Yue-Liang Wu, Zi-Ren Luo, Jian-Yu Wang, Meng Bai, Wei Bian, Hai-Wen Cai, Rong-Gen Zhi-Ming Jin Cao, Bin Chen, Di-Jun Guang-Feng Kun Ling Li-Sheng Ming-Wei Wei-Biao Yan Ze-Yi Yi-X...
soil and sludge samples based on it, in addition to the total elemental concentrations (Vercoutere et al., 1995; It is important to evaluate different digestion methods to accurately Quevauviller et al., 1993). In many countries (excluding determine elemental concentrations in soils. Three commonly used digestion procedures, hotplate aqua regia, microwave aqua regia, and the USA), this procedur...
We compared the capability of the Earth Observing-1 (EO-1) Hyperion hyperspectral (HS) data with that of the EO-1 Advanced Land Imager (ALI) multispectral (MS) data for discriminating different land-use and land-cover classes in Fremont, California. We designed a classification scheme of two levels with level I including general classes and level II including more specific classes. Classificati...
Due to the 10-bit design of SEAWIFS instrument and the signal transmission, many SEAWIFS satellite images are expected to have lower digitization noise and corrupted impulse noise. In this paper, we first analyze the characteristics of impulse noise and propose a new rank-ordered filter based on the difference of sequence for mean/standard, which is named as Statistical Ratio Rank Ordered Diffe...
Understanding and simulating plant canopy conditions can assist in better acknowledgment of plant microclimate characteristics, its effect on plant processes, and the influence of management and climate scenarios. The ability of the Simultaneous Heat and Water (SHAW) model to simulate the surface energy balance and profiles of leaf temperature and micrometeorological variables within a maize ca...
The processes of the multipond system in an experimental agricultural watershed located in southeastern China were studied during a 2-yr period (1994-1995), with the purpose of the research being the reduction of nonpoint nutrient pollution at its sources. The mechanisms studied included water storage capacity, sedimentation, denitrification, and removal of nutrients by the harvest of macrophyt...
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