bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thermodynamic Studies of Bi‐Univalent Electrolytes. IV. Osmotic and Activity Coefficients of Cadmium Perchlorate and Chloride from Isopiestic Measurements
Authors: Pan Kuan , Ni Wei‐Yang 
Published: June 2015

AbstractIsopiestic method was used to determine the osmotic and activity coefficients of cadmium perchlorate and chloride in aqueous solutions at 25°C. The dissociation degree and the real mean activity coefficient of cadmium chloride were evaluated.
Determination of Gas‐Vapor Binary Diffusion Coefficient by Gas Chromatography
Authors: Huang Ting‐Chia , Sheng Shan‐Jen , Yang Frank J. F. 
Published: June 2015

AbstractA rapid determination of the diffusion coefficients of some gas‐vapor binary systems was studied with a method similar to the operation of gas chromatograpic techniques. The diffusion coefficients of some hydrocarbons and alcohols in hydrogen atmosphere were determined. Then, detailed comparisons of these data with the available experimental values obtained by other methods and with the theoretical values calculated from the equations of Gilliland, Arnold, Hirschfeder, Slattery, Othmer, and Giddings respectively were discussed. The diffusion coefficients at various temperatures and flow rates of the carier gas were studied and their correlations to the different types of tubes were also discussed. The temperature power dependences of their diffusion coefficients were found experimentally for several gas‐vapor binary systems.
Supplementary Observations on the Chemistry of the Alkaloids of Berberine Series and Related Compounds. III. Fluorescence Spectra of the Alkaloids of Berberine Series and Their Related Compounds
Authors: Sebe Eigai , Abe Seishi , Murase Noriyoshi , Sugaya Hideo 
Published: June 2015

AbstractThe absorption maxima of the fluorescence spectra of the berberine series alkaloids are broadly distributed between 360 and 560 mμ.The fluorescence spectra of most substances of this series are very monotonous one having a single peak, the spectra of tetrahydrocoptisine and tetrahydroepiberberine are quite exceptional and consist of two wavy bands.The introduction of the auxochrome group into the molecule of “proto” compounds causes the decreasing of the fluorescence intensity and this effect is strongest in case of transition from protoberberine to berberine.That, tetrahydropalmatine does not show the distinct fluorescence spectrum band is the only incomprehensible fact.
Stability Constants of Some Divalent Complexes of m‐ and p‐Phenylenediamine Tetraacetic Acid
Authors: Chu Shu‐Kung , Chen Chien‐Fu 
Published: June 2015

AbstractThe dissociation constants of m‐, and p‐phenylenediaminetetraacetic acid (m‐, and p‐, PDTA) have been determined potentiometrically at room temperature (about 25°C) in an ionic strength of 0.10 M KNO3. The stability constatns of their metal complexes have also been determined by UV spectroscopic, potentiometric, and polarographic methods. The formula of the metal complexes by spectroscopic and polarographic methods are both in good agreement to be 1:1. The order of the stability of the metal complexes is:Cu>Ni>Zn>Co>Cd>Mg, Ca, Ba, Sr.Which is in accordance with Irving‐William stability order.
Thermodynamic Studies of Bi‐Univalent Electrolytes. VI. Thermodynamics of Cadmium Acetate from E. M. F. and Calorimetric Measurements
Authors: Pan Kuan , Chen Li‐Shu 
Published: June 2015

AbstractE. M. F. of the Cell, Cd‐Hg (2‐phase)/CdAc2(m), Hg2Ac2(s)/Hg was measured at 20°, 25°, 30° and 40°C. The standard e. m. f. of the cell, Cd/CdAc3(m), Hg2Ac2(c)/Hg was evaluated as E°=1.1500−11.09×10−4T+1.06×10−8T2 The thermodynamic data of the reaction, Cd(c) + Hg2Ac2(c)=2Hg(l)+Cd++(aq)+2Ac−(aq) at 25°C were estimated as ΔF°=−42,139, ΔH°=−48,698 cal mole−1 and ΔS°=−22.0 cal deg−1 mole−1 at 25°C. The thermodynamic data for the formation of Hg2Ac2(s) were evaluated as ΔFf°=−202.3, ΔHf°=−154.5 Kcal mole−1 and S°=72.9 cal deg−1 mole−1. From measurements of the heats of solution of CdAc2·2H2O in aqueous solution, the relative partial molal enthalpies of cadmium acetate in aqueous solution were estimated.
An Infrared Investigation of Hydrogen‐Bonded Liquids
Authors: Chen Tunli 
Published: June 2015

AbstractThis is an experimental study of the hydrogen‐bonded butanediols. Infrared spectra of those butanediols were recorded for pure liquid and vapor phase. Although those molecules do not have any symmetry, with the aid of normal coordinate analysis of n‐butane, assignments have been made for all observed infrared frequencies.
Polarized Raman Spectra V. Photoelectrically Recorded Spectra of Anthracene Single Crystal
Authors: Ting Chen‐Hanson 
Published: June 2015

AbstractThe polarized Raman spectra of anthracene single crystal are accurately measured by photoelectrical method. All the strong lines are polarized in the cc and bb polarizations, and they should be assigned to the Ag representation in the molecular symmetry group of anthracene. The polarization data are not sufficient to decide the symmetry of a Raman line; therefore, the assignments recently reported by Suzuki, Yokoyama anb Itof and by Ting2 based on polarizations have to be revised. The correct assignments agree very well with the fluorescance work by Lacey and Lyons,3 and offer strong evidences supporting our theory proposed recently.4 This theory is also tested by calculating the polarization of the most intense line at 1401 Kaisers (cm−1). The resut is very good.
Retine Part I. Purification and Partial Characterization of Retine from Pig Liver
Authors: Ting Wen‐Kuo , Guo Bang‐Kang , Kao Yueh‐Han , Li Chien‐Ming 
Published: June 2015

AbstractA modified method has been developed to purify retine from pig liver. The crude extract of retine can be separated into five fractions by paper chromatography, each of them having been tested for the effect on the proliferation of protozoal Tetrahymena Pyriformis. One of the fractions, G3, has the strongest effect. The present results show that G3 fraction showed positive reactions toward 2,4‐dinitro‐phenyl hydrazine, ethylene diamine, and ninhydrin. Other properties of the fraction has also been studied.
Studies on Polymerization of Vinyl Compounds Initiated by Metal Chelate III. Accelerating Effect of Aniline on the Polymerization of Methyl Methacrylate Initiated by Nickel Chelate of β‐Diketone
Authors: Chen Chih‐Tsung , Shiau Chuan‐Liang , Huang Yun‐Kuang 
Published: June 2015

AbstractAniline markedly accelerated polymerization of methyl methacrylate initiated by metal chelates of β‐diketones. The kinetic studies of the polymerizaion of methyl methacrylate initiated by Ni (II) acetyl acetonate in the presence of aniline yielded Rp=[I]0.55 [A]0.66 [M]1.87. The polymerization was of free radical in character. The accelerating effect of aniline was attributed to its reduction activation of the chelate. The activation energy for the overall polymerization was 21.3Kcal/mole, which yielded 33.4Kcal/mole for the activation energy for the initiation.
Extended Hückel Molecular Orbital Calculations II. The Sigma and Pi Overlap Populations in Titanium Oxides
Authors: Hsia Yu‐Ping 
Published: June 2015

AbstractA method for analysis of separate sigma and pi overlap populations in a system of very low symmetry has been proposed. The calculations are performed in Ti3O3, rutile, anatase, brookite and tetragonal barium titanate. The examination of the various bond overlap populations has led to reasonable explanation on the infrared absorption spectra of CO and CO3 chemisorption on rutile and anatase and the relative heats of formation of anatase, rutile and brookite.
Dietary Vitamin B6 and Enzymes of Methionine Metabolism in Rat Liver
Authors: Pan Foo , Pai Shou‐Hsiung 
Published: June 2015

AbstractHepatic cystathionase activity, but not methionine adenosyl‐transterase and cystathionine synthetase, was markedly decreased in weanling female rats fed a vitamin B6‐deficient diet, compared to that of the control animals fed ad libitum or pair‐fed. The depressed enzyme activity was restored rapidly to normal by administering pyridoxine to the deficient rats. Excess pyridoxal phosphate added to enzyme reaction mixtures stimulated cystathionase in liver extracts from both control and deficient animals, but it did not raise activity of deficients to normal level. The data indicate that the amount of apocystathionase in rat liver is regulated by the availability of its coenzyme vitamin.
Ion Association of Cadmium Acetate from Conductivity Measurements
Authors: Pan Kuan , Su Horn‐Yann 
Published: June 2015

AbstractConductivity of cadmium acetate over the concentration range of 10−4 to 10−3M was measured at 25°C. The approximate dissociation constant of CdAc2 in dilute aqueous solution was estimated from the relation, α=[Λ−36.5+39√C(1+2α)]/[57.9−93√C(1+2α)]. The limiting value of log10K for the association constant of CdAc+ ion was evaluated to be 1.75 at 25°C.
Polarography of Uranium (VI)‐Arsonoacetate Complex
Authors: Lai Tsai‐Teh , Chou Tse‐Chuan 
Published: June 2015

AbstractThe complexation of uranium (VI) with arsonacetic acid has been studied polarographically. A two‐step polarographic wave was obtained at lower pH value. The dissociation reaction of the complex was deduced from the kinetic current of the prewave. The asymmetry to half‐wave of polarograms was interpreted on the basis of polynuclear complex. The limits of reversibility, chelation, polymerization and precipitation of the complex, which are functions of pH and ligand concentration, were shown.
Cation Exchange Separation of Protactinium from Tantalum with Sulfuric Acid‐Alcohol Mixed Solvent System
Authors: Chen Ying‐Mao , Tsao Fu‐Pao 
Published: June 2015

AbstractDistributions of protactinium and tantalum between strongly acidic cation exchange resin and sulfuric acid‐mixed organic solvent system were studied with Pa‐233 and Ta‐182 as radioactive tracers. Methyl, ethyl and isopropyl alcohols were used as miscible organic solvents and Dowex 50 W‐X 2, Dowex 50 W‐X 12, Bio Rad AG 50 W‐X 4 and AG 50 W‐X 12 were used for different cross linking cation exchange resin. Distribution ratios were plotted against acidities by keeping compositions constant or against compositions by keeping acidities constant. From these plot tings, different trends of these two metals were found. With the use of the property of especially strong absorption of protactinium in methyl alcohol solution by resin having higher degree of cross linking, AG 50 W‐X 12, tantalum could be completely separated from protactinium.
Extractive Components from the Wood of Taiwania Cryptomerioides Hayata: A New Sesquiterpene Polyalcohols, Cadinan‐3α, 4α, 9α‐Triol
Authors: Lin Y.T. , Cheng Y.S. , Kuo Y.H. 
Published: June 2015

AbstractA new saturated triol of cadinane type, Cadinan‐3α 4α, 9α‐triol, was found, identified, and synthesized.
The Absorption Spectrum of the Lowest Triplet State in Crystalline trans‐Stilbene
Authors: Ting Chen‐Hanson 
Published: June 2015

AbstractThe absorption spectrum of the lowest triplet state (T1*‐S0) of trans‐stilbene is observed between 14,000 and 18,000 cm−1 with a crystal four centimeters long, cooled to 4.2°.K. This transition is more intense (f=3×10−9) than the similar transition in anthracene, due to vibration‐induced spin‐orbital coupling. Vibrational structures in the spectrum are well resolved and seven frequencies are assigned to normal modes in the T1* state of trans‐stilbene. Exciton structures in crystal are not resolved.
Galvanostatic Studies on Reduction of Oxygen at Silver Electrode
Authors: Lin Zui‐Feng , Fan Fu‐Ren , Liaw Yuh‐Hwa 
Published: June 2015

AbstractGalvanostatic studies with low current density in 0.1 N KNO3 medium reveal that reduction of oxygen at silver electrode is totally irreversible and in the range of oxygen concentration studied, 2.2‐306.3×10−9 mole/cm3, the E‐log [02] plot consists of two straight lines, one has a slope of 0.12 volts/decade (C>1 ppm up to air‐saturated) and the other, 0.72 volts/decade (0.1<C<0.8 ppm). The transfer coefficient, α, the heterogeneous rate constants, kofh and kogh were evaluated to be 0.12, 2.8×10−4, 1.6×10−7 for the higher concentration range, and 0.02, 4.4×10−4 for the lower concentration region respectively. A possible analytical method for tenths ppm level of oxygen is suggested.
Studies on Polymerization of Vinyl Compounds Initiated by Metal Chelate II Kinetics of Polymerization of Methyl Methacrylate Initiated by Nickel Ethyl Acetoacetate in the Presence and the Absence of Aromatic Amines
Authors: Chen Chih‐Tsung , Lin Pi‐Chou , Huang Yun‐Kuang , Shiau Chuan‐Liang 
Published: June 2015

AbstractThe kintetic studies of polymerization of methyl methacrylate initiated with nickel ethyl acetoacetate gave the following equations.Rp=K1[Monomer]1.4[Chelate]0.5, in the absence ox anilineRp=K2[Monomer]1.2[Chelate]0.5 [Aniline]0,5, in the presence of aniline.Some aromatic amines such as aniline markedly accelerated the polymerization, while pyridine had no such effect. The activation energy of initiation was 24.8 kcal/mol in the absence of aniline, and 8.8 kcal/mol in the presence of aniline. Both the kinetic data and the infrared spectra of the polymer indicated that the polymerization was radical in nature. The reaction order against monomer varied, as the temperature differed. The spectrophotometric investigation indicated formation of a complex between the chelate and the monomer, or amines. It also showed that the formation of a complex was not a factor which controlled the rate of initiation. A scheme of initiation mechanism was presented on the basis of the above experimental evidence.
Evaluation of Eigenvalues by Successive Variations
Authors: Lin Tzu Fang 
Published: June 2015

AbstractA successive variation method was studied and tested on the hydrogen molecular ion H2+. Results show that it takes less computational time than conventional method. It was also found that ground state wavefunction of H2+ can be well approximated by the linear combination of the simplest Gaussian orbitals e−I(T‐a)3
Spectrophotometric Studies of Nickel(II) and Copper(II) Chelates of p‐(2‐Hydroxy‐1‐Naphthylazo)‐Benzenesulphonate
Authors: Hseu Tong‐Ming , Lin Lang‐Sheng , Sun Hui‐Hsien 
Published: June 2015

AbstractThe ionization constant of p‐(2‐hydroxy‐1‐naphthylazo)benzene‐sulphonate (Orange II) and the formation constants of the metal chelates of this reagent with Ni(II) and Cu(II) have been determined spectrophotometrically in aqueous solution at 25° and at an ionic strength of 0.10M. The ionization constant of orange II was found to be pKa=10.95. Formation of orange II chelates with Ni(II) and Cu(II) was pH dependent, and the optimum pH range of the Ni(II) Chelate was at pH 9.2‐9.4, and Cu(II) chelate at 9.5‐9.7, respectively. The mole ratio of orange II to both of metal ions was found to be 2 to 1 stoichiometry. The formation constants (logK) of the Ni(II) and Cu(II) chelates were 12.50 and 16.11, respectively. The molar extinction coefficients and the photometric sensitivities of these chelates were determined.
Intensities in Raman Spectroscopy and Electronic Spectroscopy
Authors: Ting Chen‐Hanson , Kan Kuei‐Chiao 
Published: June 2015

AbstractThe close relationship between Raman spectroscopy and electronic spectroscopy is discussed in detail. It is found that information obtainable from these two fields are really complemental. Expressions for the contributions to the Raman scattering process from vibronic interactions and Condon effects are derived. The theoretical considerations are applied to calculate absolute Raman intensities of many diatomic molecules, to derive the selection rules of rotational Raman spectrum, and to interpret Raman spectra of organic crystals.
Extractive Components from the Seed of Myristica Cagayanensis Merr
Authors: Lin Y.T. , Kuo Y. H. , Kao S.T. 
Published: June 2015

AbstractThe n‐hexane extracts of Myristica cagayanensis Merr. was partitioned between n‐hexane and 85% ethanol. Triglyceride of myristic acid was the major constituent in the upper layer. Four crystalline compounds were isolated from the lower layer, one of which, C20H13O5, was tentatively assigned, from the spectroscopic data and chemical behaviour, as 2‐isopropyl‐3‐(3′, 4′‐methylenedioxy‐phenyl)‐4, 5‐methylenedioxy‐indanone‐1, or 2, 3‐dimethyl‐4‐(3′, 4′‐methylenedioxyphenyl)‐5, 6‐methylenedioxy‐tetralone‐1.
Some Organochlorosilanes and Their Hydrolysis Products
Authors: Liu Sheng‐Lieh , Shen Chung‐Li 
Published: June 2015

AbstractPartial alkylation of methyldichlorosilane and methylphenyldichlorosilane gave three new monochlorosilanes. Hydrolysis of methylhexylchlorosilane, methylbutylphenylchlorosilane, and methylpentylphenylchlorosilane gave corresponding silanols and siloxanes. The silanols are unstable in the atomosphere and automatically changed to stable disiloxanes which are well proved.
1,3‐ and 1,4‐Bis(Trialkylsiloxy)Naphthalenes
Authors: Liu Sheng‐Lieh , Hwang Rong‐Juh , Lee Chen‐Sheng 
Published: June 2015

AbstractTwo isomeric bis(trimethylsiloxy)naphthalenes and two isomeric bis(triethylsiloxy)naphthalenes were newly synthesized, their properties examined. The yield of 1,4‐bis(trialkylsiloxy)napthalenes was found to be less than other isomers by unknown reason.
The 7‐Iodo‐8‐Quinolinol‐5‐Sulfonic Acid Chelates of Some Rare Earth Metal Ions
Authors: Chang Tiao‐Hsu , Huang Mei‐Hsia 
Published: June 2015

AbstractThe dissociation constants of 7‐iodo‐8‐quinolinol‐5‐sulfonic acid and the formation constants of it's chelates with La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III), Dy(III), Ho(III), Er(III), Tm(III), Yb(III) and Lu(III) have been determined potentiometrically in 1:1 v/v dioxane‐water medium at 25±0.1°C and at an ionic strength of 1 with respect to sodium chloride.
Reaction of 1‐Methylindole with Dimethyl‐Acetylenedicarboxylate an 2:1 Adduct‐Dimethyl α, α‐Bis(1‐Methylindol‐3‐YL)‐Succinate
Authors: Zee Sheng‐Huz , Peng Chen‐Tai 
Published: June 2015

AbstractThe structure of 2:1 adduct of 1‐methylindole and dimethyl acetylenedicar‐boxylate was elucidated as dimethyl α, α‐bis(1‐methylindol‐3‐yl)‐succinate. Some of its derivatives were prepared.
The Decarboxylation and Dimerization Product of 1‐Methylindole‐3‐Fumaric Acid‐2,4‐Bis‐(1‐Methylindol‐3‐YL)‐2‐Methyl‐γ‐Butyrolactone‐4‐Carboxylic Acid
Authors: Zee Sheng‐Hsu , Peng Cheng‐Tai 
Published: June 2015

AbstractThe decarboxylation and dimerization product of 1‐methylindole‐3‐fumaric acid was elucidated as 2, 4‐bis‐(1‐methylindol‐3‐yl)‐2‐methyl‐γ‐butyrolactone‐4‐carboxylic acid. Some of its derivatives were also prepared.
Studies on the Alkaloids of Anona Glabra L. (I). The Isolation of (−)‐N‐Methylactinodaphnine
Authors: Yang Tsang‐Hsiung , Chen Chi‐Ming , Kuan Sung‐Shen 
Published: June 2015

AbstractChemical examination of the leaves of Anona glabra L. (Anonaceae) has led to the isolation of a new alkaloid, (−)‐N‐methylactinodaphnine (I) together with reticuline (III) from the alcoholic extract. Characterization of this base (I) by spectral evidence and direct comparison of their infrared spectra (nujol) and tlc were found identical with (+)‐N‐methylactinodaphnine except the optical rotation and mixed melting point.
Amino Acid Sequence of N‐Terminal Peptide of Normal Human Serum Albumin
Authors: Liu C.S. , Shih T. B. , Hsin M.H. , Blackwell R. Q. 
Published: June 2015

AbstractFrom the peptic digest of normal human serum albumin., the N‐terminal peptide comprising 24 amino acid residues was obtained by means of peptide mapping. Combined uses of trypsin, α‐chymotrypsin, thermolysin, carboxypeptidase A and Dansyl‐Edman technique resulted in the elucidation of amino acid sequence of no. 1 to no. 24 as follows:NH2‐Asp‐Ala‐His‐Lys‐Ser‐Glu‐Val‐Ala‐His‐Arg‐Phe‐Lys‐Asp‐Leu‐GIy‐Glu‐Glu‐Asn‐Phe‐Lys‐Ala‐Leu‐Val‐Leu‐COOH These sequence results agree completely with those recently published by other workers.
Parameters in the Pariser‐Parr‐Pople SCF MO Treatment
Authors: Lin Chi‐Hsiung , Su Lily L. , Wen Chung‐Ming 
Published: June 2015

AbstractThe variation of appointed parameter values in the Pariser‐Parr‐Pople SCF MO treatment is studied rigorously using aniline and 7‐pyrone as model systems. Their effect on computation results is never ignorable. The most dominant factor is the core charge distribution, which is required to be accurate to 0.01 electron unit if truly reasenable result is to be expected. The propriety of appointing one‐electron resonance integrals as empirical parameters in studying electronic transition energies is verified. Relative polarization Q of parameters and relative polarizability κ of interested physical observables are defined and are utilized in the comparative study on the effects of the variation of parameters in the treatment. A conclusion obtained is that it is possible to change energy factors of the system while keeping its structural factors unchanged' through the simultaneous variation of the valence‐state ionization potential and the one‐center repulsion integral of any atom in the system.
Low‐Frequency Lattice Vibrations in Organic Compounds and the Shpolskii Effect
Authors: Ting Chen‐Hansom , Kung Yu‐Hwa 
Published: June 2015

AbstractIn the Shpolskii effect, aromatic compounds dissolving in n‐alkanes of suitable lengths show quasi‐linear absorption and emission spectra when frozen to 77°K. Mixed crystal such as naphthalene dissolving in durene does not show fine structures above 20° K. This difference is likely due to the fact that the lattice vibrations in n‐alkanes have very low frequencies as shown in their Raman spectra at 77 °K.
Polarized Raman Spectra VIII. Ramam Intensities of Anthracene Excited by Different Laser Light
Authors: Ting Chen‐Hanson , Hsien Chi‐Chen 
Published: June 2015

AbstractAn Ar‐Kr ion laser was used to excite the Raman spectrum of powdered anthracene with two laser lines of 4880 and 6471 Å. There are significant differences in the intensity distribution in these two Raman spectra. These differences can be best explained by considering that Raman intensities are contributed by two allowed excited states of anthracene, and their contributions depend upon the laser frequency. From these Raman spectra, it is also possible to infer the vibrational structures in the higher energy, structureless excited state of anthracene.
Alkaloids of Senecio Taiwanensis Hayata and Senecio Morrisonensis Hayata
Authors: Lu Sheng‐Teh , Lin Chung‐Nan , Wu Tian‐Shung , Shieh Der‐Cherng 
Published: June 2015

AbstractTwo alkaloids, rosmarinine (I) from Senecio taiwanensis Hayata and integerrimine(II) from Senecio morrisonensis Hayata, were isolated and identified respectively.
Studies on the Alkaloids of Lotus Receptacle
Authors: Yang Tsang‐Hsiung , Chen Chi‐Ming , Lu Chang‐Sha , Liao Chen‐Long 
Published: June 2015

AbstractFrom lotus receptacle (seed pod of Nelumbo nucifera Gaertn., four alkaloids, nuciferine (I), N‐nornuciferine (VIII), oxoushinsunine (IX) and N‐norarmepavine (X) were isolated. Identification of these bases were carried out by their spectral data and direct comparison with authentic samples. It is interesting that oxoushinsunine (IX), a cytotoxic alkaloid shows tumor inhibitory activity against nasopharynx carcinoma reported recently by D. Warthen et al13). The biscoclaurine (IV and V) and quaternary water soluble base (VI) only occures in the embryo. Comparison their alkaloids distribution in each part of Formosan lotus was listed in the Table 1.