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    题名 作者 年代 出处 被引量
1Study on patterns and chemical features of NO effect on marine phytoplankton growth显示文摘This article discusses the patterns of NO effect on marine phytoplankton growth from chemical perspective.The experimental results of four algae,which are Platymonas hal-golandica var.tsingtaoensis,Platymonas subcordiformis,Skeletonema costatum and Nitzschia closterium farma minutissima,are as follows:(i) In f/2 medium or f/50 medium,the growth of these four algae was obviously promoted or inhibited when nitric oxide of different concentrations was added once or twice each day during the cultivation;(ii) The NO effects on the growth of marine phytoplankton are in normal distribution.Different phytoplankton has different optimum NO concentration,which is consistent with the influence of NO on the growth of high plants;(iii) The effect of NO on Platymonas halgolandica var.tsingtaoensi,which is a food alga,is different from that on the red tide algae Skeletonema costatum and Nitzschia closterium farma minutis-sima.The authors put forward a new opinion that every alga has its own NO threshold concen-tration.All the above results may provide new clues to understand the formation of red tide.ZHANG Zhengbin LIN Cai LIU Chunying XING Lei WU Zhenzhen SUN Feng 2005Science China Chemistry2005,48,4:9
2Study of elemental distribution in soil on the loess plateau of China显示文摘Instrument neutron activation analysis (INAA) has been employed in this study to determine 32 elements in soil on the loess plateau. The preliminary results suggest that geochemical characteristics of elements in the soil mainly retained those in the parent materials (loess). It has been found that fractional deposition among grain sizes in the process of loess transportation as well as the bioclimate in which the soil developed are main factors affecting the regional variations of elemental distribution in soil on the plateau. Contour maps of element concentrations plotted from the trend analyses exhibit the major patterns of the distributions and variations on the plateau. Furthermore, the study also provides evidence for the aeolian theory of the loess transportation in China.Tian Junliang, Li Yaqi Liu PulingNorthwestern Institute of Soil and Water Conservation, Chinese Academy of Sciences, Shaanxi 712100, China 1993Journal of Environmental Sciences1993,5,1:0
3Road to Exchanges and Mutual Learning显示文摘The Silk Road shares much with silk.Sometimes it is like flowing silk threads.Some lines are clear,and some are intermittent.And sometimes it is like a large silk net covering a vast land with gorgeous patterns.Wang Shuya 2023China Pictorial2023,,10:0
4A Two-in-One Annealing Enables Dopant Free Block Copolymer Based Organic Solar Cells with over 16%Efficiency显示文摘The caption of Figure 4:“Figure 4(a)2D-GIWAXS patterns.(b)IP and(c)OOP line cuts.Calculated results of d-spacing and CL values for(d)IP and(e)OOP directions.”should be corrected to“Figure 4(a)Jph vs Veff relationships.(b)VOC and(c)JSC vs light intensity plots.Hole-only(d)and electron-only(e)device results.(f)Summarizedμh,μe and ratios.”Shangfei Yao Linji Yang Shasha Shi Yang Zhou Min Long Wenhao Zhang Songlin Cai Ciyuan Huang Tao Liu Bingsuo Zou 2023Chinese Journal of Chemistry2023,41,7:0
5U-SEQUENCE AND PERIOD-TRIPLING PHENOMENA IN A FORCED NONLINEAR CSCILLATOR显示文摘Experiments on a nonlinear oscillator reveal the same periodic structure as that in one-dimensional unimodal maps and a simple method is found to assign words from a symbolic dynamics of two letters to the periods observed in experiments.This paper gives plentiful patterns of U-sequence,including period-tripling patterns R*RL,RL*RL and RL^(2)*RL.Spectral analysis gives a confirmation of the patterns.WU Shu-xian PEI Liu-qing GUO Fen 1985Chinese Physics Letters1985,2,5:0
6Transverse patterns and spatiotemporal instability of a photorefractive oscillator显示文摘IN time realm,instability and chaos phenomena of a nonlinear optical system have been dis-cussed extensively.In recent years,as much interest was attracted to the transverse ef-fects in nonlinear optics,the study was developed to the spatiotemporal region.These non-ZHUANG Jun and TAN Weihan1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China 2. Shanghai University, Shanghai 201800, China 1997Chinese Science Bulletin1997,42,9:0
7世界与环境显示文摘Climate change is a longterm shift in global or regional climate patterns.Often climate change refers specifically to the rise in global temperatures from the mid20th century to the present.曾沛楷 2024疯狂英语(新读写)2024,,4:0
8EMBROIDERING KAZAK LIFE Stories of traditional clothing of the Kazak ethnic group显示文摘Jenisgul became the inheritor of traditional clothing of the Kazak ethnic group, a national intangible cultural heritage of China. When I met Jenisgul, she was discussing a design with an embroiderer. She greeted me with an energetic smile in her elegant and blue velvet dress embroidered with Kazak patterns.Wang Fengjuan 2021China Report ASEAN2021,6,6:0
9VISUALIZATION AND MEASUREMENT OF VORTEX FLOW IN SPINNING SHELL-CASE显示文摘The characteristics of a flow in spinning devices are one of the fundamental problems innew-type spinning.In this paper the vortex flow in interior of the shell-case was studied by usingexperimental methods,which include flow visualization and laser doppler techniques.The flow sur-vey by measurement has been compared with that photographed by flow visualization method,andshows a fairly good conformity.The results of experiments are similar to those by numericalevaluation.张道生 1993Journal of China Textile University(English Edition)1993,10,3:0
10Distribution patterns of the Jurassic ostreids (Bivalvia) from Tanggula of China显示文摘Distribution of the Jurassic ostreids (Bivalvia) from Tanggula area of China includes three patterns, which are (1) Tethys: containing Liostrea birmanica and Eligmus rollandi, (2) western Europe and northern Tethys: consisting of Gryphaea (Bilobissa) bilobata; and (3) Global: composed of Actinostreon gregareum and Nanogyra nana. However, they are all limited between palaeolatidudes 60° South and North. Actinostreon gregareum originated in the Sinemurian of northern Chile and it entered Kenya and Madagascar in the Toarcian, but there is no reliable Si-nemurian-Toarcian A. gregareum fossil record in continental margins between Chile and Kenya and Madagascar. Such distribution patterns and dispersal processes have demonstrated that (1) during the Jurassic all seas and oceans were connected to each other; (2) the Tethys and the western European epicontinental seas did produce some endemic taxa; (3) the distribution of these ostreids was most likely controlled by latitudes and creature ecology; and (4) A,沙金庚 2001Science China Earth Sciences2001,44,S1:0
11Synthesis of LiNbO_3 via a hydrothermal route and characterization显示文摘YU Ji LIU Xing-quan 2004合成化学2004,12,z1:0
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