Table of Content

20 November 1999, Volume 34 Issue 6

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Effect of TIBA on the Regeneration of the Tissues and Changes of Peroxidase and Esterase Isozyme after Removal of Xylem in Broussonetia papyrifera

WANG Zhen,CUI Keming,LI Juhuai

1999, 35(6):  750-759. 

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After the removal of xylem in Broussonetia papyrifera (L.) Vent. treelets, an IAA-transport inhibitor TIBA (tri-iodobenzoic acid) was applied around the trunk above the portion removal of xylem. TIBA inhibited the promotion of IAA on the regeneration and activity of cambium and phelogen, and differentiation of xylem and phloem. And the changes of peroxidase and esterase isozyme during the regeneration were closely related with the differentiation of the regenerated tissues.

Adaptation of Photosensitive Neuron Response to Maintained Illumination on Caudal Ganglion and Ascending Pathway in Crayfish

RUAN Hongyu,ZHANG Renji

1999, 35(6):  760-767. 

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Crayfish A6 ganglion responses to 520nm monochrome illumination with an increase in discharging frequency, which shows an obvious adaptation after 2min. During the adaptation period the responses to test-illuminations decline. This characteristic response can not be suppressed by extracellular high [Mg²⁺], but be accelerated by it alternatively. Extracellular high [Ca²⁺] can accelerate the adaptation. It seems there is no chemical synapses involved in the adaptation. Extracellular low [Na⁺] can delay the time course of adaptation, and the effect of low [Na⁺] can be diminished by the extracellular high [Ca²⁺]. Also, we did not observe transportation of the characteristic response across hypopharyngeal ganglion. This suggested a central reflex model that was initiated by the photosensitive neuron in crayfish CNS perhaps. Statistics from 239 samples imply a possibility during development course of crayfish: the neuron reserves photosensitive potential to response to illumination; or gradualy eliminates its function in adult stage.

Study on Segmentation of Active Faults

LI Shude

1999, 35(6):  768-773. 

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Tectonic earthquakes are closely related to active faults. A large active fault, generally speaking, usually produces a great earthquake. Our research results show that destructive earthquakes only occur on some special parts or segments along active faults. So the most important thing for mitigation of earthquake hazards is to recognize earthquake-triggering segments by using the theory and method of active fault segmentation. Active faults have typical inconsistent characteristics of rupture and displacement along the faults in temporal and spatial distribution and leave some traces on surface and inner structure such as geomorphologic expression, structural feature, distribution of small earthquakes and rupture sign etc. Based on the characteristics, we may make assessment of earthquake risk in different segment along an active fault and predict the location and intensity of potential destructive earthquakes in future.

Study on the Reaction between Proteins and the Complex of Cu(II)-sulfochlorophenol S and Its Application

HU Qiuluan,ZHAO Fenglin,LI Kean

1999, 35(6):  734-737. 

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Cu(II)-sulfochlorophenol S could combine with BSA to form a blue three component complex in Clark-Lubs buffer at pH 2.5, which possesses maximum absorption at 724nm with 53, 93 and 160nm of red shift compared to the Cu(II)-sulfochlorophenol S complex, BSA-sulfochlorophenol S complex and dye itself, respectively. The standard curves of some kinds of proteins were constructed under optimum condition obtained in our lab. The linear range is large. The assay is sensitive, accuracy, and tolerant to many foreign substances. Moreover, all the reagents are stable and the performance is easy to carry out.

Preparation and Spectroscopic Investigations of Lanthanide Complex of Polyoxometalate(Ⅰ)
Na₁₇[Ln(ZnW₁₁O₃₉)₂]·xH₂O

ZONG Ruifa,TIAN Wen,WENG Shifu,WU Jinguang,YANG Yongli,ZHAO Keping,LIU Jingfu

1999, 35(6):  727-733. 

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A series of novel rare earth coordination compounds, sodium salt of bis(undecatungstozincate) lanthanide(III), was synthesized and characterized by the means of FTIR, FT-Raman as well as Diffuse Reflectance techniques. Vibrational studies show that the ligand is defect α-Keggin type. The electronic charge and its distribution on the anion are the main factors affecting the W-Od vibration. The negative charge is almost evenly distributed among the whole polyoxometalate complex. Compared with ZnW₁₂O₄0^6- , ZnW₁₁O₃₉^10- is deformed, the W-Ob-W angle of ZnW₁₁O₃₉^10- is smaller and the W-Oc-W angle is greater. Electronic spectroscopic investigations demonstrate that there is no inversion center in the complex and the coordination number of the lanthanide element in the complex is about eight, which is possibly consistent with antiprism structure of the rare earth.

Electrocatalytic Study of DA at FcCOOH/Nafion Chemically Modified Electrode

YANG Qinghua,YE Xianzeng,TAO Jiaxun,SUN Haoran,DONG Shaojun

1999, 35(6):  738-744. 

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Electrochemical behavior of FcCOOH/Nafion chemically modified electrodes has been studied in an aqueous solution. When scanning between 0.0～0.8V(vs. SCE), experiments indicate that the chemically modified electrode have good stability and reproducibility. It is found that the chemically modified electrodes have electrocatalytic activity to dopamine in the medium of 0.1mol/L LiClO₄ and 0.5mol/L glycine. The linear range for determining DA is 2.0×10^-5～1.5×10^-3mol/L and the correlation coefficient is 0.997. The apparent rate constant electrocataly-tically is evaluated by means of rotating disk electrode.

Studies on Phenomenon of Microemulsion in Neutral Phosphorus Extraction System

JIAO Jieying,JIANG Jianzhun,GAO Hongcheng

1999, 35(6):  745-749. 

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Focused on neutral phosphorus extractant (TBP, P205, P350, TRPO etc.)-diluent-water-acid system, this paper analyzes the changes of volume and conductivity following the acidity changes in organic phase, discusses the joint of water, acid and neutral phosphorus extractant in organic phase and phenomenon of microemulsion in extraction based on the experimental techniques such as NMR and Laser-Light-Scattering etc. It is demonstrated that aggregation (reversed micellar and microemulsion) is favored in the organic phase by a certain extend of acidity in the extraction of HCl, H₂SO₄ and HClO₄.

The Alluvial Fans along the Eastern Foot of Helan Mountain

MO Duowen,ZHU Zhongli,WAN Linyi

1999, 35(6):  816-823. 

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There are many alluvial fans developed along the eastern foot of Helan Mountain. Under the control of climate, mountain features and the Huanghe River, the fans have many different characters comparing with the fans of other region, such as conglomerate with boulders on the surface, big slope and abrupt slope change, salt lake or swamp, sand dunes at the margin of the fans. And also there are many different features among the fans themselves. Dawukou alluvial fan, located at the north end of the study area, has fine sediments, big fan area, flat slope and typical morphology. In front of the middle segment of the mountain, there is Dashuigou alluvial fan with coarse sediment, moderate slope and less fan area. Helankou alluvial fan, at the south segment of the mountainside, consists of coarse sediment, steep slope and moderate fan area. This paper describes the geomorphology, sediments, fan size, fan figure and depositional structure of the fans along the eastern foot of Heln Mountain. In study of the relationship of the fan features and the source basin features we got such relations as: A_f =6.245A_d^1.09h^1.33 and r=10.67A_d^-0.27h^0.39 (A_f: fan area, A_d: source basin area, h: relief, r: fan slope). And we concluded that the main factor affecting the fan area and slope of this region is the relief of Helan mountain.

The Hydrothermal Sedimentary Genesis of Barite Deposits in West Hunan and East Guizhou

WU Chaodong,YANG Chengyun,CHEN Qiying

1999, 35(6):  774-785. 

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The super hydrothermal barite deposits occur in west Hunan and east Guizhou. The paper mainly deal with the characteristics of the sedimentary and geochemistry of barite. The results show that the abundant resources are from the hot spots of the crust of the continental margin in early Cambrian, and deposited the Si-P-Ba-PGE series. The Cambrian black shales sediment in anoxia environment, but the degree of reducing was low. The content of organic matter in barite is small, but it is primary. Ba was from the hydrothermal gas and liquid, and the organisms transverse and enrich Ba, and S was from the seawater fractionated by the organisms, the δ³⁴S are as 4.165%.

Chemical Characteristics and Genesis of Major Ions in the Pearl River Basin

CHEN Jingsheng,HE Dawei

1999, 35(6):  786-793. 

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According to water chemistry data from 1959 to 1984 at 109 monitoring stations collected from the water yearbook edited by the Water Conservancy Ministry of China, the chemical characteristics and genesis of major ions of the Pearl River System were investigated. The results are as follows. The contents of total dissolved solids in the Dongjiang River are relatively low (about 66.1mg/L) and the hydro-chemical type is C^Na. The contents of total dissolved solids in the Xijiang River are relatively high (about 202.5mg/L) and the hydro-chemical type is C^Ca, and those of the Beijiang River are between these of Dongjiang and Xijiang. The ionic runoff modules in pearl River Basin are much higher than those in the other river basin of China. The composition of major ions in the Dongjiang is dominated by the weathering of alumno-silicates stones and the ionic composition in the Xijiang is dominated by the leaching of limestones.

Method and Application of the Environmental Planning for Economic Development Zone under Uncertainty (I)
Inexact Multiobjective Mixed Integer Programming Model and Its Algorithm

ZOU Rui,GUO Huaicheng,LIU Lei

1999, 35(6):  794-801. 

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Based on the characteristics of the environmental planning for economic development zone, this paper proposes an Inexact Multiobjective Mixed Integer Programming (IMOMIP) model which can be applied to solve the problems of multiobjectives, dynamic and uncertainty, and an interactive algorithm which based on the Objective-Deviation-Tolerance-Level(ODTL) is developed to solve the model. The IMOMIP and its solution algorithm can reflect the uncerain information through the solution process and in the result, at the same time, the coordination of different objectives which did not possess clear correlation can be achieved.

Method and Application of the Environmental Planning for Economic Development Zone under Uncertainty (II)
Environ-economic System Planning for Haicang Investment Zone

GUO Huaicheng,ZOU Rui,LIU Lie

1999, 35(6):  802-808. 

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In this study, an Inexact Multiobjective Mixed Integer Programming (IMOMIP) model which can reflect the characteristics of the Haichang Investment Zone is established to do the work of environ-economic system planning. Based on the solutions of the model, the results such like the optimized dynamic industrial structure, allocation of the air pollutants discharge, allocation of water pollutants discharge, water resource utilization, waste water plant expansion and afforestation are obtained. At the same time, by means of dual linear programming, the paper also analyzes the restrict factors of the regional development.

The Study on the Slope Stability Near the Dam of ChenCun Reservoir

HU Xiaomeng

1999, 35(6):  809-815. 

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Since ChenCun dam was build, there have occurred some landslides near the dam, which do influence its security. What contribute to these landslides are such geological factors as faults, tension joints and bedding joints, and heavy rainfall during the rainy season. According to the structure of the landslides, they are divided into four types: slip-shear slide, burst slide, wedge slide and slump slide. After studying the relation of the precipitation during the rainy season and the number of landslides of every year (from 1982 to 1996), the author finds the majority of the landslides occurred in these rainy seasons when the precipitation is more than 600mm or 650mm. In order to assess the stability of the slopes near the Dam, some mathematical ways are used to calculate the general value of the slopes, which shows the stability of the slope. Based on the value, the slopes are divided into three types: the full-stable, the partly-stable and the non-stable. From these statd above, it can be known when and where the land slides would most probably take place, and then some measures would be taken in time to protect the slopes.

The Sedimentary Facies and Paleotopography of Wangfujing Oriental Plaza Site, Beijing

XU Haipeng,MO Duowen,YUE Shengyang,ZHU Zhongli,YU Jincheng

1999, 35(6):  824-833. 

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The sedimentary characteristics and facies of the cultural layers in the late Paleolithic period of the late Late-Pleistocene in the Wangfujing Oriental Plaza site were studied based on the comparison and analysis of the typical sedimentation profile of the site and more than 150 stratigraphic data. The paleo-geomorphic surfaces during the periods of 2.2×10⁴ a B.P. were rediscovered. The study suggests that the ancients must have acted in the sandy islands of alluvial fans, which were evolved in relatively steady water flows during the interglacial stage with slightly warming in the last glacial epoch. The cause of the absent of human activities between the upper and lower cultural layers in an interval of about 3.14×10³ a has also been discussed in detail. It is concluded that this was resulted from the strengthening and unstable water flow. The potential former settlements or camping sites of the ancients prior to moving to this area are also discussed. It is suggested that they might came from other higher dissected old alluvial fan platforms evolved at the same period or earlier in the western part of the plain. These results provide evidences for the reconstruction of the geomorphic environment of Beijing plain during the Late Pleistocene and the study of prehistoric human history.

Effect of Aeration of Hong Kong Sediment on Lead Binding

JIA Zhenbang,LAM Kinche,LV Fengwei

1999, 35(6):  834-841. 

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Acid-Volatile Sulfide(AVS) has been shown to be the largest part of the activity of total sulfide content in anoxic sediments. Acid-Volatile Sulfide(AVS) controls the concentration of heavy metals in pore water of reduction phase sediments and it forms sulfide with heavy metals again, and effects the chemical species of heavy metals in sediments. Study has been proven to be the dominant phase AVS reacting with heavy metals. Change of AVS can occur either through human activities, such as dredging waterways and harbors, or by natural phenoment, such as resuspension due to storms and changes in sediment Chemistry. The study passed a series of laboratory aeration experiments for 32 days, effect of probe the change of sulfide content on lead. The result shows that aeration of sediments results in rapid decrease of the (AVS). At the same time, distinct changes also occurred in the values of Pb, E_h, DO, and pH.

A Technique on Automatic Compression and Recovery of Fundamental GIS Spatial Data on Varying Map Scale

YIN Lianwang,LI Jing

1999, 35(6):  842-849. 

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Based on the traditional theory of cartographic generalization, this paper has proposed a relatively systematic, scientific and practical model of quantity selection of spatial objects. It is based mainly on spatial features properties and can be used to compress and recover geographic information in forms of vector automatically in accordance with the map scale. Then through the experiment of multiscale GIS with a set of maps in the region of Dalian, Liaoning province, this model and technique have been proved valuable and relatively successful.

Study on Mechanism of BSA Binding with Carboxynitroazo

HU Qiuluan,LI Kean

1999, 35(6):  850-854. 

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In this paper, it is found firstly that BSA can sensitively react with carboxynitroazo, used as a good colouring reagent of some inorganic ions before, in acid medium and at room temperature. The absorption spectra and its reaction mechanism were studied. BSA binds with carboxynitroazo mainly through the static electric force. The maximum combination number of carboxynitroazo binded on BSA was determined, based on principle of molar ratio method. The results were conform to the change of its spectra. The fundamental conditions of the reaction and the possibility of spectrophotometric determination of proteins using carboxynitroazo were discussed.

The Spermatocyte and Spermatozoid of Ginkgo biloba

ZHANG Zhongming

1999, 35(6):  859-865. 

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During the nearly three month period of differentiation and development of the spermatocyte of the Ginkgo biloba, the spermatocyte nucleus had changed from spherical- to spindle- and back again to spherical-shaped in succession. As the nucleus was at the spindle-shaped stage, blepharoplast, vacuole-like structures and fibrillogranular body appeared in its cytoplasm, the former two were symmetrically arranged along the nucleus, while the fibrillogranular body was situated in the proximal face, Such arrangement may play a most important role in the regulation and in consequence may lead to the anticlinal division of the spermatocyte. The newly formed spermatozoids which stood against each other along their flat faces, had 3-4 levo-rotated gyres of flagellates as one of the end. The vacuole-like structure in each of the spermatozoid laid either at the proximal or distal face, or alternatively. The newly formed spermatozoid with the appearance of the fertilization drop was a very important phenomenon for getting spermatozoid of Ginkgo biloba efficiently.

FT-IR Spectra Study of Dicyclopentadienyl (Bissubstituted Cyclopentadienyl) Dithiocyano of Titanium, Zirconium and Hafnium

ZHANG Jianbo,XU Zhenhua,CHEN Shoushan

1999, 35(6):  855-858. 

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The FT-IR Spectra of eighteen (R-Cp)₂M(NCS)₂ were measured. The M-Cp, M-NCS(M=Ti, Zr, Hf) and other vibration modes were reasonably assigned. All complexes of (R-Cp)₂M(NCS)₂ determined at this paper are bonded by N-M. The influence of the center metal atoms and the substituent on cyclopentadienyl upon the spectra was discussed. It is mainly in far IR. region that center metal atoms influence upon the IR. spectra. The influence of the substituent on cyclopentadienyling upon its vibration is not significant.