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   marine chemistry 的翻译结果: 查询用时:0.134秒
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marine chemistry
相关语句
  海洋化学
     Study of Marine Chemistry by Means Nucleus Technique
     应用核技术的海洋化学研究
短句来源
     Build Marine Chemistry Base Speciality to Promote Development of Marine Sciences
     建设海洋化学基地专业,促进海洋科学事业发展
短句来源
     APPLICATION OF SEMIDIFFERENTIAL ELECTROANALYSIS IN MARINE CHEMISTRY——Ⅱ.Semidifferential Electrochemical Stripping Voltammatry with Glassy Carbon Solid Electrode for Determination of Trace Lead and Copper in Sea Water
     半微分电分析法在海洋化学中的应用——Ⅱ.玻璃碳固体电极半微分电化学溶出法测定海水中痕量铅、铜
短句来源
     In this paper, the build-up of "marine chemistry base class" is summarized in several aspects including curriculum, teaching svstem, teacher and student training, and the future suggestions for the marine chemistry base construction are also made.
     从课程和教学体系、师资队伍建设、培养学生的创新能力以及强化学生的海洋观意识等方面总结了我国“海洋化学基地班”的建设工作,并在此基础上提出了教学硬件和教改,创新能力培养和加强基地辐射作用等内容的“十五”期间基地建设设想。
短句来源
     Exploration on Offering Comprehensive and Design Experiment in Marine Chemistry
     开设海洋化学综合性设计性教学实验的探索
短句来源
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  “marine chemistry”译为未确定词的双语例句
     The phosphorus (P) is an essential nutrient for the growth of all organisms, and it takes a crucial action on the sea and it became an important object of the study in marine chemistry.
     本论文旨在建立一种比较完善的低浓度磷(P)的测定方法,以解决低P水体中P的分析问题。
短句来源
     Relatively simple, economical and reliable methods of analysis are highly desirable in marine chemistry researches. Chemical sensors are such that they play important roles in measuring concentrations or activities of some chemical species. Developments of p CO 2, sulfide and NH 3-N marine chemical sensors are reviewed in this article.
     化学海洋学研究数据的获得需要方便、经济、高效的分析测试手段 ,化学传感器则是海洋调查和监测DO、pH、CO2 、NH3-N和S( -Ⅱ)等的理想手段和工具。
短句来源
     A comprehensive and design experiment in marine chemistry was explored.
     对开设综合性、设计性教学实验进行了尝试。
短句来源
  相似匹配句对
     PROGRESS IN MARINE PHYSICAL CHEMISTRY
     海洋物理化学进展
短句来源
     THE CHEMISTRY OF MARINE ANTINEOPLASTIC SUBSTANCES
     海洋抗肿瘤活性大环内酯类化合物化学成分研究近况
短句来源
     Blood Chemistry
     血液化学
短句来源
     On Green Chemistry
     略论绿色化学
短句来源
     Marine Toxins
     海洋生物毒素
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  marine chemistry
This paper presents a critical review of the current state of knowledge of trace metal processes in the Humber plume, as illustrated by the marine chemistry of Pb and Zn.
      
As regards marine chemistry information is given on new developments in instruments which perform continuous and automatic analyses, with some practical applications.
      
This isotherm cannot be expressed by the isotherm equation used in marine chemistry at present.[7] Besides, there has been no report in literature about this type of isotherm in so far as the reaction of minor elements on hydrous oxides is concerned.
      
During 1988 to 1990, we conducted studies related to meteorology, environmental geology and engineering, physical oceanography, and marine chemistry and biology.
      
These results have certain reference value to the researches of marine chemistry, marine biology and marine sedimentology in China, and reveal the importance of organic geochemistry to the study of oceanology.
      
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1.This article deals with the interaction of cadmium with S-MnO2, yMnOOH and manganite existing in natural water system. They were prepared for our experiment in our own laboratory and proved to be three different kinds of matter by infrared spectrum. The order of first saturated quantity of cadmium partitioning on these three is:-MnO2> marganite > r-MnOOH2.The mechanism of reaction between, cadmium and 6-Mn02, manganite and y-MnOOH in seawater have been studied in detail. Since the "ratio of exchange (%)-pH"...

1.This article deals with the interaction of cadmium with S-MnO2, yMnOOH and manganite existing in natural water system. They were prepared for our experiment in our own laboratory and proved to be three different kinds of matter by infrared spectrum. The order of first saturated quantity of cadmium partitioning on these three is:-MnO2> marganite > r-MnOOH2.The mechanism of reaction between, cadmium and 6-Mn02, manganite and y-MnOOH in seawater have been studied in detail. Since the "ratio of exchange (%)-pH" graph shows an " S shaped" curve, it is possible to deduce that the chemical reaction is of the nature of cation exchange. And since pHrange of ion exchange - 4, it is possible to deduce further that the reaction can be explained by the mechanism of mo-novalence cation exchange:This mechanism and the speciation of cadmium quite agree.3.The main achievement of this article is the discovery of a new type of isotherm, of which there has been no mention in literatures at home and abroad and which can not be represented by adsorption isotherm equation available for marine chemistry. This new type of isotherm is characterized by two "knees" and three "plateaus", the ratio in heights of the latter in 1:2:3 ratio.4.In order to explain theoretically our new isotherms, this article suggests the application ,of interfacial stepwise ion exchange for liquid-solid distribution of minor elements on suspended particulate matter, the following isotherm equation is derived from this theory:We suggest using the extrapolation method and plot From the intercept and the slope on the resulting straight line are can obtained 1 and 2 as well as 2 and 3.The results are as follows:5.Oakley et al. have reported a model of cadmium partitioning on MnO2, i.e. an isotherm belonging to the Freundlich type, the reason why they failed to get the same isotherm as we have got in this article is because of certain weakness in their experiments as reported in literatures, viz.: (1) experimental data points are too few; (2) range of concentration is too narrow; (3) treatment of experimental data was somewhat super-fical. Consequently, such isotherm cannot reflect completely the reality.6.The results obtained in this article will be of theoretical significance in marine geochemistry of cadmium.

本文研究海水中镉与δ-MnO_2,γ-MnOOH和水锰矿的相互作用,反应机理为:主要成果是发现了一类文献上尚未报道过的新型等温线,目前尚无等温式可表达它们。为在理论上解释这种新型等温线,本文提出应用界面分级离子交换理论,并进而导出了等温方程式:θ=sum from i=1 to N (iH_ia_M~i)/1+sum from i=1 to N (H_ia_M~i)由此式计算出的理论曲线与实验数据相吻合。为求式中的H_i(i=1,2,3),本文提出通过“θ/(1-θ)~aM-(2-θ)~aM/(1-θ)图”和““θ-H_1(1-θ)~aM/(2-θ)a~2M-(3-θ)~aM/(2-θ)图”,用作图法求之。

1.This paper deals with a new type of isotherm in seawater systems that has not been represented by the. adsorption isotherm equation so far in marine chemistry. It has two characteristics: (1) the non-linear relationship between the amount of ion exchanged particulate matter and the equilibrium concentration in the initial low concentration portion of the curve showing instead an exponential function with slight concave upward ; (2) the isotherm being made up of two "S shaped'' curves, which interesect...

1.This paper deals with a new type of isotherm in seawater systems that has not been represented by the. adsorption isotherm equation so far in marine chemistry. It has two characteristics: (1) the non-linear relationship between the amount of ion exchanged particulate matter and the equilibrium concentration in the initial low concentration portion of the curve showing instead an exponential function with slight concave upward ; (2) the isotherm being made up of two "S shaped'' curves, which interesect each other near the middle with one "knee' and two "plateaus" at the intersection.2.With a view to explaining theoretically such isotherms as these and as an attempt we suggest using a theory of interfacial stepwise ion exchange for liquid-solid distribution of minor elements on suspended paxtieulate matter to derive a corresponding isotherm equation:(1)Let i=1,2, then from the above equation we have:Again letplotting a family of normalized curves for" -logQ against various values of we got by means of curve fitting method: 3. The mechanism of reaction in seawater between zinc and goethite, hematite and amorphous iron oxide, respectively., has engaged our serious attention. From the fact that the ratio of exchange( % )-pH graph is an "S shaped"curve it is possible to deduce that the step of chemical reaction is a cation exchange and from the resulting pHange of cation ion exchange-4, a monovalance cation exchange mechanism can be further deduced.This is in agreement with the speeiation of zinc in seawater.4.The goethite, hematite and amorphous iron oxide used in our experiments were prepared in our own laboratory and confirmed by electron microscope and exchange tests to be three different kinds of hydrous iron oxide. The order of first saturated ion exchange amount of zinc partitioning on these three is:goethite>amorphous iron oxide > hematite5.Benjamin and Leekie's isotherm of zinc partitioning on amorphous iron oxide can be represented by Freundlich's formula, while Takematsu's isotherm of zinc partitioning on hydrated iron oxide can 'be represented by Langmuir's formula. However, these results of theirs differ from ours because of (1) too narrow a range of concentration in their experiments; (2) too few of experimental data points; (3) lack of thoroughness in their treatment of experimental data. Consequently, the results they obtained cannot reflect completely the reality.6.Results obtained here can well serve as a theoretical guidance in marine geochemistry of zinc.

本文在海水中锌与三种形式的水合氧化铁相互作用之pH曲线和等温线两方面取得如下主要结果:(1)实验发现了一类有一个“拐点”或两个“平台”的海洋化学上的新型等温线;(2)用分级离子交换理论解释了这类等温线;(3)基于上述理论导出了与实验结果吻合的等温线方程式;(4)用作图法求出了相应的平衡常数H_1和H_2;(5)由离子交换率(%)-PH曲线知,镉以CdCl~+的形式在水合氧化铁上进行阳离子交换。并详细研究了实验条件的变化对曲线的影响。

This article applied LFERs (Linear Free Energy Relationships) in marine chemistry to discuss the effect of salinity on apparent ionization constants of weak acid in sea water, interf acial ion exchange reaction of metal ion on suspended particles in ocean and complex reaction of various metal ions with major inorganic ligands in sea water. Based on both the B-C equation and literature data it was proved that LFEEs existed between apparent stability constants of complex compounds formed from major inorganic...

This article applied LFERs (Linear Free Energy Relationships) in marine chemistry to discuss the effect of salinity on apparent ionization constants of weak acid in sea water, interf acial ion exchange reaction of metal ion on suspended particles in ocean and complex reaction of various metal ions with major inorganic ligands in sea water. Based on both the B-C equation and literature data it was proved that LFEEs existed between apparent stability constants of complex compounds formed from major inorganic ligand with various metal ions in sea water media. It was found that LFEEs also existed between apparent stability constants of interfacial coordination compounds formed from suspended particles with Cu, Zn, Cd in ocean. The apparent ionization constants of weak acid in sea water i.e. H20, H2C03, HSB03 and so on, were briefly discussed in term of chemical thermodynamics, and we found that LFEEs existed between apparent ionization constants of these weak acids. It means that the apparent ionization constants of weak acid at various salinity could be determined from the LFEEs.

本文应用LFERs讨论了海洋化学中盐度对海水中弱酸解离常数的影响,金属离子在海洋悬浮颗粒上的表面离子交换反应以及各种金属离子与海水中主要无机配位体的络合反应。根据E-C方程和文献数据证明了海水介质中主要无机配位体与各种金属离子形成的络合物表观稳定常数之间存在着LFERs。发现海洋中悬浮颗粒与Cu,Zn,Cd形成的表面配位络合物表观稳定常数之间也存在着LFERs。根据化学热力学简单讨论了海水中H_2O,H_2CO_3,H_3BO_3,等弱酸的表观解离常数,并且发现其相互间亦存在着LFERs。这表明在各种盐度下的弱酸表观解离常数可根据LFERs确定。

 
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