共查询到20条相似文献，搜索用时 46 毫秒
1.
《广东海洋大学学报》2016,(3)
在实验室条件下设置380~410、430~460、530~560、610~640 nm等4种波长,以及60、120、180、240、300、360μmol·m~(-2)·s~(-1)等6组梯度光子照度,分别观察单枝霜鹿角珊瑚在不同光谱波长、光子照度条件下珊瑚的生长特性和代谢水平。结果表明:光子照度240μmol·m~(-2)·s~(-1)的不同光谱条件下,霜鹿角珊瑚平均生长率(G)、单位面积叶绿素含量(Nchl-a)、蛋白质(ω_P)、脂质(ω_L)、碳水化合物(ω_C)质量分数变化呈显著性差异(P0.05),除ω_C以外,均在波长530~640 nm光谱光照条件下达到最大值,其中ω_L是ω_P和ω_C的10倍以上;不同光谱、光子照度梯度条件下,光照条件下的钙化率(G_L)、净光合作用效率(P_N)、总光合作用效率(P_G)差异具统计学意义(P0.05),在一定范围内,G_L、P_G、P_N随着光子照度增强而升高,当光子照度超过光合效率光饱和值时,停止升高或开始降低;G_L/G_D和G_L/P_G值也随着光子照度增强而升高,变化范围分别在1.51~7.05、0.26~0.69之间,但P_G/P_N值随着光子照度增强而降低,变化范围在0.69~7.38之间。 相似文献
2.
复平面上两个亚纯函数f(z)与g(z),若IM分担{∞},它们的一个导数IM分担1,则或者f(z)≡g(z),或者满足代数方程R(f,g)≡0,其中R(ω1,ω2)=ω1n(ω-1)m-ω1n(ω2-1)m. 相似文献
3.
复平面上两个亚纯函数f（z）与g（z）,若IM分担{∞},它们的一个导数IM分担1,则或者f（z）≡g（z）,或者满足代数方程R（f,g）≡0,其中R（ω1,ω2）=ω^n（ω-1）^m-ω2^n（ω2-1）^m． 相似文献
4.
张三华 《成都信息工程学院学报》2008,23(3):329-332
给出一种[ω（A）]^n^2步内找到Fuzzy矩阵B∈L^n×ω（A）,使A=B⊙B^ST成立,从而计算出给定亚可实现Fuzzy矩阵A的亚容度ω（A）的算法。 相似文献
5.
《广东海洋大学学报》2017,(1)
以盾形陀螺珊瑚(Turbinaria peltata)为对象,实验室条件下进行4种波长光谱、光子照度梯度变化单因子对照试验,研究其在不同光谱波长、光子照度条件下的生长特性和代谢水平。结果显示:4种光谱条件,且光子照度240μmol·m~(-2)·s~(-1)时,珊瑚平均生长率(G)、单位面积虫黄藻密度(N_Z)、脂质含量分数(ω_L)变化呈显著性差异(P0.05),单位面积叶绿素含量(Nchl-a)、蛋白质(ω_P)、碳水化合物(ω_C)含量分数差异不显著,都在波长范围380~460 nm光谱光照条件下出现较高值;不同光谱、光子照度梯度条件下,光照条件下的钙化率(G_L)、净光合作用量(P_N)、总光合作用量(P_G)差异显著(P0.05),在一定范围内,G_L、P_G、P_N随着光子照度增强而升高,当光子照度超过光合效率光饱和值时,停止升高或开始降低;G_L/G_D和G_L/P_G值也随着光子照度增强而升高,变化范围分别在1.73~8.42和0.11~0.58之间,但P_G/P_N值随着光子照度增强而降低,变化范围在1.78~4.74之间。 相似文献
6.
封闭溶样硫脲介质原子吸收测定矿石中银的应用实践 总被引：1，自引：0，他引：1
通过采用封闭溶样,研究了在硫脲介质中用原子吸收法测定矿石中的银,讨论了溶样体系、介质、酸度及试剂等对测试的影响。本法适用于岩石、矿物中的ω(Ag)/10-6=1.0～500(仪器有背景校正装置)的测定。 相似文献
7.
液塑限试验是土工试验的重要项目之一,塑限试验一般用手工操作、人为因素大、效率低,但局部地区塑限与液限却有如ωＰ＝ ａ ＋ ｂωＬ 的近似线性相关公式。这样用液限就可直接计算塑限,是简捷快速、提高效率的较好方法。本文就郑州市区西部的８ 个工程１６６ 组土样用数理统计的最小二乘法计算出了塑限与液限的相关公式。 相似文献
8.
LOWESS在锶同位素地层学中的应用 总被引：1，自引：1，他引：0
锶同位素地层学是海相地层定年和全球对比的有效工具。为了建立全球范围的ω(^87Sr)／ω(^86Sr)比值一年龄数据库，就必须对大量的ω(^87Sr)／ω(^86Sr)比值-年龄数据进行拟合，寻找最佳方法用于缩小最佳拟合曲线的区间范围是目前锶同位素地层学所面临的难题之一。在各种统计与拟合方法中，LOWESS(局部加权回归散点修匀法)为研究计算全球标准锶曲线最佳拟合模式提供了一种非参数拟合的精妙方法，拟合得出的最佳曲线能较好地作为海相地层的定年和进行全球对比的基础数据，并具有较高的置信区间。 相似文献
9.
The fatty acid compositions of seston and Calanus sinicus were investigated to study trophic relationships in Jiaozhou Bay. Principal component analysis was carried out to ordinate the fatty acid patterns of seston in stations and months. The results showed that diatoms were most abundant in the phytoplankton at station A5 (located in the northwest of the bay:36°9′N, 120°20′E) and least abundant at station D7 (located outside of the bay: 35°59′N, 120°26′E). By contrast, dinoflagellates were most abundant at station D7 and least abundant at station A5. According to the annual variations of 16:1ω7 and 18:4ω3/ 16:1ω7, diatoms flourished mainly in spring and summer, while dinoflagellates bloomed exclusively in summer. A distinctive feature of the fatty acid composition of C. sinicus was the prevalence of 20:5ω3 and 22:6ω3. The higher content of 16:1ω7 over 18:4ω3 in females indicated that diatoms contributed more than dinoflagellates to the diet of C. sinicus. The feeding intensity of C. sinicus on diatoms was higher in spring and autumn than in other seasons. The herbivorous indicators 20:1 and 22:1 were comparatively low, suggesting that besides phytoplankton, C. sinicus might feed on a wider range of particles including organic detritus, bacteria and small copepods. 相似文献
10.
催化波极谱法测定化探样品中的钨钼 总被引：3，自引：0，他引：3
试样在高铝坩埚中用过氧化钠熔融分解,用水浸取,制备成测定钨、钼元素的母液.取部分母液,酸化后用硫酸-苯羟乙酸-饱和氯酸钾-辛可宁体系中连续测定钨、钼.本法适用于试样中ω(W)/10-6=0.5-200和ω(Mo)/10-6=0.5-200的测定. 相似文献
11.
12.
The ability of cell to modulate the fluidity of plasma membrane was crucial to the survival of microorganism at low temperature. Plasma membrane proteins, fatty acids and carotenoids profiles of Antarctic psychrophilc yeast Rhodotorula sp. NJ298 were investigated at -3 ℃, 0 ℃ and 8 ℃. The results showed that plasma membrane protein content was greater at -3 ℃ than that at 8 ℃, and a unique membrane polypeptide composition with an apparent molecular mass of 94.7 kDa was newly synthesized with SDS-PAGE analysis; GC analysis showed that the main changes of fatty acids were the percentage of unsaturated fatty acids (C18∶ 1 and C18∶ 2) and shorter chain saturated fatty acid (C10∶ 0) increased along with the decrease of the culture temperature from 8 ℃ to -3 ℃; HPLC analysis indicated that astaxanthin was the major functional carotenoids of the plasma membrane, percentage of which increased from 54.6±1.5% at 8 ℃ to 81.9±2.1% at -3 ℃. However the fluidity of plasma membrane which was determined by measuring fluorescence anisotropy was similar at -3 ℃, 0 ℃ and 8 ℃. Hence these changes in plasma membrane's characteristics were involved in the cellular cold-adaptation by which NJ298 could maintain normal plasma membrane fluidity at near-freezing temperature. 相似文献
13.
《极地研究(英文版)》2014,(4)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprehensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose 相似文献
14.
《中国海洋大学学报(英文版)》2014,(4)
<正>Copyright Submfnion of a roanusatpt inks:that the work described has not been published before(exoept In the form of an abstrW or as part of a published lecture,review,or thesis);that it is not under consideration for publication elsewhere that its publication has been approved by ail 相似文献
15.
《中国海洋大学学报(英文版)》2014,(6)
<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research results on oceanography and marine fisheries.The fieldcovered include the physical,chemical,biological,geo- 相似文献
16.
Massimo GRECO 《山地科学学报》2014,(6):1383-1384
<正>The 35th IAHR World Congress was held in Chengdu,China from September 8 to September 132013.The title of the conference was:"The Wise Finds Pleasure in Water:Meandering through Water Science and Engineering".During the congress,1239 papers were presented in 139sessions for oral presentations and 7 sessions for poster presentations.After the Congress,a Committee was appointed to select some of the best papers presented at the Congress for publication,after a 相似文献
17.
As an important component of the cryosphere,sea ice is very sensitive to the climate change.The study of the sea ice physics needs accurate sea ice thickness.This paper presents an electromagnetic-induction(EM) technique which can be used to measure the sea ice thickness distribution efficiently,and the successful application in Bothnian Bay.Based on the electromagnetic field theory and the electrical properties of sea ice and seawater,EM technique can detect the distance between the instrument and the ice/water interface accurately,than the sea ice thickness is obtained.Contrastive analysis of the apparent conductivity data obtained by EM and the value of drill-hole at same positions allows a construction of a transformable formula of the apparent conductivity to sea ice thickness.The verification of the sea ice thickness calculated by this formula indicates that EM technique is able to get reliable sea ice thickness with average relative error of only 12%.The statistic of all ice thickness profiles shows that the level ice distribution in Bothnian Bay was 0.4-0.6 m. 相似文献
18.
Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area. 相似文献
19.
Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter. 相似文献
20.
《极地研究(英文版)》2014,(3)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied 相似文献