STUDIES OF THE DEVELOPMENT OF KALOULA BOREALIS HARBOUR Ⅱ. THE EFFECT OF FOOD ON THE DEVELOPMENT OF THE DIGESTIVE SYSTEM

Tadpoles of Kaloula borealis Barbour were used for feeding experiments. They were fed separately on four different kinds of food viz, 1) yolk of hardboiled egg,2) algae collected from ponds 3) yolk and algae together and 4) yolk,lgae plus thyroxin. The control specimens consisted of tadpoles richly collected from time to time from outdoor ditches.     

THE EFFECT OF ANION ON THE MORPHOLOGY OF ELECTRODE, THE ADSORPTION OF QUINOLINE AND THE SER SPECTRA

The effect of different anion on the morphology of electrode, the adsorption of quinoline and the SER spectra are investigeted. The adsorption peak of quinoline appears in cyclic voltammogram in Cl~- (or Br~-) -containing electrolyte, but not in NV_3~- solution. We also find that the adsorption of quinoline is correlated with Cl~- concentration. This indicates some complex consist of Cl~- and quinolne are produced on Ag surface, Scanning electron microscopy is used to evaluate differences in surface morphology subjected to ORC treatment in different anion solution.The surface morphology of Aq electrode roughened in NO_3~- solution on which no SER signal can be observed differs greatly from that of Ag electrode which roughened in Cl~-(or Br~-)-containing electrolyte.     

THE POPULARIZATION OF PUTONGHUA & THE NORTHWARD SPREAD OF CANTONESE

自建国以来,普通话作为我国的唯一官方语言得到了各级政府的大力推广.如今,普通话的推广工作得到了显著的成效.但是另一方面,随着广东,香港,澳门等省市或地区的经济飞速发展,广东话也逐渐在全国范围内流行,成为中国的一大方言.笔者就普通话南下和广东话北上的语言现象作了初步的阐释.     

CHOICE OF THE GAUGE FOR THE FIRST POST-NEWTONIAN GRAVITATIONAL POTENTIAL OF THE EARTH

ＴｈｅＥａｒｔｈｓｇｒａｖｉｔａｔｉｏｎａｌｐｏｔｅｎｔｉａｌ（ＧＰ）ｃａｎｂｅｅｘｐａｎｄｅｄｉｎｔｗｏｆｏｒｍｓ：（ｌ）ｓｐｈｅｒｉｃａｌｈａｒ－ｍｏｎｉｃｓｅｘｐａｎｓｉｏｎ；（２）ｅｘｐａｎｓｉｏｎｉｎｔｅｒｍｓｏｆｍｕｌｔｉｐｏｌｅｍｏｍ...     

THE STUDY OF THE“TASTE ORGANS”OF THE TAILLESS AMPHIBIAN TADPOLES

This paper deals with the study of the so-called "taste organs" of 35 spe ies of tadpoles of different kinds of frogs and toads. They represent 7 families and 13 go.ieva and are mostly from West China. Kaloula borealis is utilized for more detailed study as it is a common species of Peking and its environs, consequently we are in possession of sufficient material both for the study of the morphology and the development of these organs.     

THE CALCULATING EQUATIONS OF THE THERMOPHYSICAL PARAMETERS OF THE MOIST AIR AT HIGH TEMPERATURE

By using compression factors of real gas and the Vilia equations and considering the variation of the thermophysical parameters of the mois air with its temperature, this paper develops the calculating equations of the thermophysical para leters of the moist air at high temperature ranging from 100℃- 200℃. It is convenient to calculate the thermophysical parameters and the thermophysical processes of the moist air at high temperature.     

AN EXAMINATION OF THE INFLUENCE OF STABILIZERS ON THE PHOTOCHEMICAL STABILITY OF DISPERSE DYES

There is a powerful market-need for superfast disperse dyes in special use, e.g. for automotivefabrics. The photochemical fading reactions of dyes are often very complicated, and no singlphotodegradation pathway can be involved for all kinds of dyes. To enhance the photostability of the commonly used disperse dyes, a series of tests on the ef-fect of variable stabilizers on the photodegradation rate of nine representative disperse dyes werecarried out both in ethyl acetate solution and on cellulose acetate film. A moderate light sourceemitting above 300 nm was adopted in this study to simulate the photofading under practical appli-cations. The results show that, in solution, 2,2,6,6-tetramethyl-piperidine is the most effectivegeneral stabilizer for all the tested dyes, but on cellulose film, nickel diethyl-dithiocarbamateshows the greatest general protecting effect, and a synergistic effect is observed for special combina-tions of stabilizers.     

THE DEFENCE OF FREEDOM

本书的作者五年前曾出版了一部批评民治主义的书,(1)从实际主义者的眼光批评民治主义对於‘通常人’的迷信。他认为民治主义者所谓‘通常人’并没有所想像的潜力,用教育的方法并不能令其发展成有用於政治社会的个人。所以他认为唯有放弃对於‘通常人’潜力的迷信,才能使得民治主义继续生存。 现在倡说这种学说的人,忽而出来为自由辩护。在这本书里他注意於实际政治问题的解决而不注意於自由的理论探讨。意大利的史家克罗齐(Croce)会从十九世纪的欧洲史实,倡说民治的精义与自由的精义是相互抵触的;‘自由是质量的,活动的,精神的宗貌,民治是…     

A SYNOPSIS OF THE REVISED SYSTEM FOR THE CLASSIFICATION OF CHARACEAE

All charophytes,whether living or fossil,are placed in a single class,theCharophyceae.This is generally divided into the following three orders:theSycidiales,Trochiliscales,and Charales.All living genera are referred to the familyCharaceae.J.Groves‘(1935)and R.D.Wood‘s(1962)systems for the classification ofthe Characeae were quite generally followed until today.Groves and most phyco-logists think that the corticate forms(e.g.Chara)have been derived from the     

EXPLORATIONS OF THE MODERNIZATION OF CHEMICAL EDUCATION

By means of producing and using TV teaching materials on chemical teaching,the authors have been exploring thecomprehensive reform in the curriculum system,the teaching content and the teaching methods of the subject ofchemical education at higher normal universities.This paper takes the production of TV-teaching programme     

THE SYMBOLS OF YI KING,OR THE SYMBOLS OF THE CHINESE LOGIC OFCHANGES.

周易为古籍中难解之书,故亦为多解之书。经师家主一说,固无论矣。而自汉以後学者以异学牵合经义者代有其人,如汉儒之傅会图议,魏晋人之援引老庄,宋儒之推衍象数,皆其中之最著者。邵雍传陈传之学,演易卦为皇极经世,司马光提扬雄太玄而作洗虚,推衍象数,系统尤密,各自以为发宇宙之玄理,然以後人观之,皆不免有“空中楼阁”之感(程颐论邵雍语)。沈仲涛君;以多年学易之所得,著为易卦与科学一书,大旨在阐明吾国五千余年前先哲之玄学(沈君以八卦为西磨纪元前3322年伏义所书)实与二十世纪之科学相吻合。沈君八卦爻与几何,代数,算术,物理,天文,化学,逻…     

THE OXYGEN-ALKALI BLEACHING OF THE STRAW PULP

1INTRODUCTIONAt present, the pulp industry is facing to the large stress against using bleaching agents which contain the chlorine. And the paper making industry has fixed the attention to lighten the environment pollution. To reduce the pollution, many countries have carry through the TCF (total chlorine free bleaching), and that the oxygen-alkali bleaching is one of the maturate technology of TCF by now. To obtain clean produce the oxygen-alkali bleaching of NaOH-AQ straw pulp has b…     

THE ORBITAL EVOLUTION OF THE NEAR-EARTH ASTEROIDS

ＴＨＥＯＲＢＩＴＡＬＥＶＯＬＵＴＩＯＮＯＦＴＨＥＮＥＡＲ┐ＥＡＲＴＨＡＳＴＥＲＯＩＤＳＬｉｕＬｉｎＪｉＪｉａｎｇｈｕｉ（ＤｅｐａｒｔｍｅｎｔｏｆＡｓｔｒｏｎｏｍｙ，ＮａｎｊｉｎｇＵｎｉｖｅｒｓｉｔｙ，２１００９３，Ｎａｎｊｉｎｇ，ＰＲＣ；）Ｋｅｙｗ...     

ON THE STANDARDIZATION OF THE KEYBOARD MANAGEMENT MODULE

Both the variety of Chinese Information input techniques and the complexity of the users‘ demands require that the keyboard management module with the ability to input Chinese Information could be modified and expanded conveniently.This paper presents a standard structure of this keyboard management module which will meet the needs of developing Chinese Information input techniques.     

THE INFLUENCE OF DRAWING CONDITIONS OF PET POY ON STRUCTURE AND PROPERTY OF THE FIBER

Drawing tests upon PET POY have been made by using dynamic thermal stress analyser,which show that the dynamic thermal stress of fiber is readily affected by drawing conditions. Aseries of samples have been obtained under different drawing velocities, drawing temperatures anddraw ratios. The variations of structural factors of fiber such as the orientation, crystallinity,crystallite size and the thermal shrinkage have been measured. It is proved through experimentsthat the thermal shrinkage(Y) of the drawn fiber of PET POY is influenced by the orientation (rep-resented by sonic velocity x_1) and crystallinity (x_2) of the fiber. The quantitative relationship is es-tablished using the binary regression method: Y=10.2246+2.2030x_1-26.2670x_2 The mechanical properties such as tenacity, elongation, yield stress, initial modulus and the te-nacity at 10% elongation, etc. have also been measured. The relations between the tenacity at 10%elongation (D) and drawing velocity(V), draw ratio (DR), drawing temperature (T), and sonic ve-locity and crystallinity have been obtained using a method of mathematical statistics: D=4.594-0.009 6V , D=-8.937+7.170DR, D=2.866+0.00629T, D=-7.34+2.866x_1+6.314x_2 These equations fit well with data from the experiments. This work will be benefical to the control of quality of products and the development of newproducts.     

THE POLYELECTROLYTIC BEHAVIOURS OF ACIDIC AQUEOUS SOLUTIONS OF CHITOSAN IN THE PRESENCE OF EXTERNAL SALTS

The viscosities of chitosan-HAC in aqueous solution with various amount of NaAC have beenmeasured.Based on the analysis of experimental data,an empirical equation is deduced to des-cribe the relationship between the intrinsic viscosity and the concentration of external salt in thechitosan solution:[η]=[η]_∞+P/m~nand another empirical equation is proposed for describing the variation of reduced viscosity ofchitosan solution as function of salt and chitosan concentrations:(η_(sp)/c)_(salt)={D+A/(1+BC+HC~2)}·{1-1/(([η]_m=0)/([η]_(m=0)-[η]_∞)+P/m~R)+(C~/m~)}where the first term represents the relationship between viscosity and polymer concentration in theabsence of external salt,while the second term represents the correction value on viscosity in thepresence of external salt.