bluuebunny/crossref_metadata_2025 huggingface dataset:
Cathodic Action of the Metal Complexes at the Dropping Mercury Electrode. VI. Uranyl‐Para‐Methylaminophenol Sulfate Complex
Authors: Lai Tsai‐Teh , Wang Bi‐Cheng
Published: June 2015

The complex formation of uranyl ion with p‐methylaminophenol sulfate has been studied polarographically over the pH range 1.5 to 4.7.

A 1‐electron reversible reduction wave was observed in this pH range. At pH. higher than 4.7, a reduction wave of complexing agent was produced.

The diffusion current is proportional to the concentration of uranyl ion from 2.0×10−4M to 5.1×10−3M. The diffusion current constant has been found to be 1.54±0.03, and the diffusion coefficient (7.96±0.2)×10−G sq. cm. per second.

Two hydrogen ions, in the pH range of 1.5 to 21, and one hydrogen ion, in the pH. range of 3.4 to 4.7, were consumed respectively by the reduction of three uranyl ions. At pH 2.6 to 4.7, U(V) had one ligand less than U(VI).
Polarography and Spectrophotometry of Copper‐Glutamate Complex
Authors: Lai Tsai‐Teh , Chang Teh‐Liang , Wang Bi‐Cheng
Published: June 2015

A deep blue colored chelate compound resulting from the reaction between copper ion and glutamate was studied polarographically and spectrophotometrically.

A single reversible wave corresponding to the reduction of the copper‐glutamate complex to the Cu(I) state was observed in the pH range 4.5 to 6.7.

Only one kind of chelate compound, CuG2= was detected. The electrode reaction is formulated thus CuG2= + H++e=CuG− + HG−

The diffusion current constant is 3.13 for 0.2 M glutamic acid and 0.1M potassium chloride at pH 6.2.

The copper‐glutamate complex (1:2) has an absorption maximum at 615 mμ. and its absorbance was constant at the wide pH range 4.2 to 9.2. Its instability constant was calculated to be 3.5×10−7.
Chelatometric Titration of Cadmium with Gallein Indicator
Authors: Sun Peng‐Joung
Published: June 2015

It has been found that gallein can be used as an indicator in the direct chelatometric titration of a number of metals. A method based on this fact has been devised for the chelatometric determination of cadmium with disodium salt of EDTA.

The optimum pH for the titration was found to be 9.5 to 10. A buffer solution consisting of ammonia and ammonium chloride was used to keep the solution at this optimum pH in the titration. The color of indicator changed from violet to magenta red at the end point.

No interference was observed in the presence of a variety of anions and univalent cations.
Lithium Aryls. II. Preparation of p‐Lithiobenzaldehyde‐Diethyl‐Acetal by Direct Metallation and Halogen‐Lithium Interconversion
Authors: Chang Daniel Y. , Yu Ruey‐Jiin
Published: June 2015

The direct metailation and the halogen‐lithium interconversion of p‐bromobenzaldehyde‐diethyl‐acetal by the action of lithium and n‐butyl lithium have been investigated. They resulted in the production of p‐lithiobenzaldehyde‐diethyl‐acetal with yields amounting to 11 % and 20 %, respectively, based on p‐bromobenzaldehyde‐diethyl‐acetal.
Seroflocculating Steroids. IX. New Syntheses of Ethyl 3β‐Chloro‐II‐Cholenate; other Active Compounds
Authors: Chang Frederic C.
Published: June 2015

Two new syntheses of the compound, ethyl 3β‐chloro‐11‐cholenate, used as the screening test standard in seroflocculation studies, are described. Additional compounds were synthesized and screened for activity.
The Effect of Sex Hormones on Cholesterol Biosynthesis
Authors: Chen Yu Min
Published: June 2015

An investigation was undertaken to study the effect of sex hormones on cholesterol biosynthesis by using the albino rats of the University of Southern California strain fed on three different kinds of diets: (a) Control diet, containing 15% cottonseed oil (I); (b) Diet (I) containing 1% cholesterol (II); (c) Fat‐free diet (III).

By liver slice technique, the results showed the following:

In rats fed with control diet (I), the male had a much higher rate of cholesterol biosynthesis than the female; and the cholesterol biosynthesis in both male and female rats was decreased by gonadectomy as compared with the intact male and female animals on the same diet.

In rats fed with diet (II) or (III), the cholesterol biosynthesis was greatly decreased, due to the feeding of cholesterol‐containing or fat‐free diet so that gonadectomy caused no more distinct effect on the cholesterol biosynthesis.

The cholesterol biosynthesis was greatly enhanced by sex hormone administration in rats fed the three kinds of different diets.

The effect of sex hormones to increase the cholesterol biosynthesis in liver is probably their secondary influence caused by their primary influence to reduce the liver cholesterol by different mechanisms.
Kinetic Studies of the Alkaline Hydrolysis of Alkyl Acetates by Conductometric Measurements
Authors: Pan Kuan , Chang Chen‐Fee , Hong Hui‐Shong
Published: June 2015

Reaction rates for the alkaline hydrolysis of methyl‐, ethyl‐, n‐propyl‐ and n‐butyl acetates in the presence of 0.01 N sodium hydroxide solution at 15°, 20°, 25°, 30° and 35°C were followed directly by conductometric measurements of the reacting system. The energies and entropies of activation for these reactions were estimated.
Polarographic Studies of Dioxo‐Complexes of Germanium. I. The Ge(IV)‐Pyrocatechol‐Sulphonphthalein System
Authors: Pan Kuan , Lin Zui‐Feng
Published: June 2015

Pyrocatechol‐sulphonphthalein (abbreviated to PV) and its germanium complex were polarographically studied in an acetic acid‐acetate buffer at various pH's. A well‐defined reduction wave for PV with E ranging from —0.46 to —0.73 volt (S.C.E.) was observed in the pH region 3.2—7.0 at 25°C. This wave corresponds to a one‐electron reduction which is nearly revrsible. By following the ia values of PV at varying mole ratios of Ge(IV) to PV, the composition of the complex was deemed to consist of Ge(PV)2 and the instability constants were found to be (3.1±0.4)×10−8 at pH 5.0, (1.7±0.3)×10−8 at pH 6.1 and (1.9±0.4) × 10−8 at pH 6:5, respectively. A mthod for the computation of the instability constant of complex was proposed.
Polarographic Studies of Dipicrylamine. IV. Polarographic and Amperometric Determinations of Potassium with Sodium Dipicrylaminate
Authors: Lin Zui‐Feng
Published: June 2015

Polarographic and amperometric methods for the determination of potassium by using sodium dipicrylaminate as the precipitating agent were investigated. Several methods for the location of the end point in the amperometric titration and the method for the calculation of the original concentration of potassium present in the test solution were discussed. In the amperometric titration, the sample solution was presaturated with potassium dipicrylaminate. A 0. 1 F sodium hydroxide solution was used as the supporting electolyte. The constant potential applied was —1.8 volt vs. a Hg‐pool electrode and the temperature was 0—0.3°C. Advantages and disadvantages of the methods were discussed. The solubility of potassium dipicrylaminate and the solubility product of dipicrylamine at various temperatures were determined spectrophotometrically. A special type of filter bar used in the solubility and solubility product determinations was described.
Comparative Studies of the Physico‐Chemical Properties of Native Rice Starch and Ponlai Rice Starch
Authors: Liau Yun‐Hau
Published: June 2015

Some differences in physico‐chemical properties between the starch granules of Native Rice and Ponlai Rice have been found; The protein content and amylose content of Native Rice starch are higher than that of Ponlai Rice. They exhibit different types of gelatinization curves. The effect of protein distribution and that of amylose content on the physical properties of rice starch granules has been discussed.
The Chemistry of 8‐Mercaptoquinoline and its Derivatives. I. Synthesis of 8‐Mercaptcoquinoline
Authors: Lee H. S.
Published: June 2015

An improvement has been made in Edinger's method of preparing 8‐mercaptoquinoline. A new method of synthesizing the same compound, which consists of the reduction of quinoline‐8‐sulfonyl chloride, has been developed. It has been found that the S‐benzoyl derivative of 8‐mercaptoquinoline readily undergoes acoholysis.
γ‐Ray Induced Emulsion Polymerization of Vinyl Chloride
Authors: Wang Ung‐Ping
Published: June 2015

Emulsion polymerization of vinyl chloride induced by γ‐ray irradiation has been studied. The effects of irradiation time, of emulsifier concentration, of vinyl chloride concentration and of the dose rate have been investigated and discussed. The initial reaction rate (Rp) and the degree of polymerization (P) were recognized to be proportional to the exponential powers of the value of the emulsifier concentration (Cs) as represented in the following formulae in which the exponents were found to be different from those given by Smith and Ewart.

magnified image

The value of Rp was greatly effected by the dose rate (D) and it was also found to be proportional to the exponential powers of D as shown in the following formula.

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The Chemistry of 8‐Mercaptoquinoline and its Derivatives. II. Kinetics of the Alcoholysis of S‐Benzoyl‐8‐Mercaptoquinoline
Authors: Lee H. S.
Published: June 2015

The Kinetics of the alcoholysis of S‐benzoyl‐8‐mercaptoquinoline has been investigated by using spectrophotometric method.
Enrichment of Chromium‐51 by Szilard‐Chalmers Process
Authors: Tsai Chung‐Hsiung , Yeh Si Jung
Published: June 2015

Enrichment of chromium‐51 by Szilard‐Chalmers process was studied, using potassium and ammonium chromate as target materials. Separation of enriched phase from the target was carried out by ion exchange method. Enrichment factor as high as 3,000 was attained for a potassium chromate target. When ammonium chromate was used as the target, the enrichment factor was much lower, amouting only to 150.
Spectrophotometric Studies of Dioxo‐Complexes of Quadrivalent Metals. I. Complexes of Zirconium and Hafnium with Pyrogallolsulfonephthalein
Authors: Pan Kuan , Lin Zui‐Feng , Lin Sheng‐Hsien , Wu Yu‐Lin , Chen Eng‐Ming
Published: June 2015

Pyrogallolsulfonephthalein and its complexes with zirconium and hafnium were spectrophotometrically studied in HClO4 and NaClO4 solutions of various pH's. An absorption maximum at 472 mμ has been found for pyrogallolsulfonephthalein at pH 1.0 and 1.5. It shifts to 518 and 520mμ in the presence of zirconium at pH 1.0 and hafnium at pH 1.5, respectively. The mole ratios of both metals to the dye have been found to be 1:1, and the apparent instability constants of the complexes are estimated as 1.34×10−5 for the former and 7.06×10−6 for the latter.
Cathodic Action of the Metal Complexes at the Dropping Mercury Electrode. VIII. Uranyl‐Glycinate Complex
Authors: Lai Tsai‐Teh , Lin Han‐Ton , Hsieh Ching‐Chiang
Published: June 2015

The formation of complex between uranyl ion and glycine was investigated by the polarographic method. A reversible and diffusion controlled reduction waves were observed over the pH range 1.7 to 5.0 when the glycinate concentration was 0.049M to 0.393M. The effect of pH and the concentration of chelating agent on the half‐wave potential has been determined. The chelate species and the electrode reactions have been established.
Infrared Absorption Spectra of Halogenoflavonoids. I. 8‐Halogenoflavonoids.
Authors: Lin Chi‐Hsiung , Su Jen‐Tsu , Chen Fa‐Ching
Published: June 2015

Infrared absorption spectra of eleven 8‐halogenoflavonoids, flavanone, and 2′‐hydroxychalcone in the region 3,500–3,650cm−1 are observed with an Infracord Spectrophotometer in solid state. Absorption bands in the regions 3,500–1,400 cm−1 and 1,000–650 cm−1 are discussed.
O‐Trimethylsilyl Derivatives of Xylenols
Authors: Ho Chin‐Hsia , Liu Sheng‐Lieh
Published: June 2015

Four new silyl derivatives of isomeric xylenols were prepared and their properties are reported.
Infrared Absorption Spectra of Halogenoflavonoids. III. 6‐Halogenoflavonoids
Authors: Lin Chi‐Hsiung , Su Jen‐Tsu , Chen Fa‐Ching
Published: June 2015

Infrared absorption spectra of nineteen 6‐halogeno‐flavonoids in KBr disks are observed with an INFRACORD Spectrophotometer. Absorption bands in the regions 350C‐1400 cm−1 and 1000–650 cm−1 are discussed.
Infrared Absorption Spectra of Halogenoflavonoids. IV. Absorption Bands between 1400 cm−1 and 1000 cm−1
Authors: Lin Chi‐Hsiung
Published: June 2015

Through the comparison of spectra of fourty‐nine halogeno‐flavonoids, the origin of the main absorption bands between 1400 cm−1 and 1000 cm−1 is investigated. In addition to various C‐H in‐plane deformation bands, ten kinds of vibrations are tentatively assigned by way of correlating the spectra and structures of these substances.
Determination of Thoria Contents in Taiwan Monazite Sand and its Associated Minerals by Gamma Scintillation Spectrometry
Authors: Hstng Yun‐Shu , Chou Jing‐Liang
Published: June 2015

A rapid method for the determination of thoria content in Taiwan monazite sand and its associated minerals, zircon, and ilmenite, is presented. The method is gamma scintillation spectrometric, taking the area under the composite photopeak of Ra‐224 (0.241Mev) and Pb‐212 (0.239Mev) as a measure of the thoria content. It is applicable to minerals with thoria content ranging from 10% to 0.01%. The relative standard deviation is 3%. A determination can be made within one hour directly on the sample.
Preparation of Iodine‐131‐Labelled Rose‐Bengal by Radioactive Exchange Method
Authors: Chen Teng‐Yueh , Yeh Si‐Jung
Published: June 2015

Labelling of rose bengal with iodine‐131 was studied by using carrier‐free NaI‐131 produced at the National Tsing Hua University. The effects of pH and hydrogen peroxide on the radioactive exchange reaction were investigated. It was observed that as high as 88% of iodine‐131 was exchanged under the optimum conditions found in the present study. The purity of the I‐131 labelled rose bengal obtained by the exchange method was examined by paper chromatography, and was found to be satisfactory.
Reaction of Salicylic Acid with N‐Bromosuccinimide
Authors: Chen Shu‐Min , Yeh Ping‐Yuan
Published: June 2015

The reaction of equimolar amounts of NBS with salicylic acid in carbon tetrachloride was found to give tribromophenol, 4‐bromo‐ and 4,6‐(not 4,5)‐dibromo‐salicylic acids, while the same reaction carried out in dioxane yielded only tribromophenol and 4‐bromosalicylic acid and addition of pyridine into the reaction mixture (in dioxane) decreased the yields of the products. The fact that no 4,6‐dibromosalicylic acid could be produced in a dioxane medium is a strong evidence showing that the bromination in dioxane takes place through dioxane dibromide as the intermediate.
Preparation of Carrier‐Free Sodium‐24 by 24Mg (n,p) 24Na and 27Al (n, α) 24Na Reactions
Authors: Pan Kee‐Chuan , Chen Yi‐Der , Hong Hwei‐Kwan , Chang Chau‐Ting
Published: June 2015

Carrier‐free sodium‐24 was prepared by bombardment of magnesium carbonate and aluminum foil with fast neutrons produced by the Tsing Hua Open Pool Reactor. The induced nuclear reactions were 24Mg (n,p) 24Na and 27AI (n,α 24Na respectively. The separation of the isotope was carried out by leaching, precipitation, solvent extraction and ion exchange. For each separation method used, the chemical yield and decontamination factor were determined and compared. It was found that ion exchange column operation was the most satisfactory method among all.
Extraction of Itaconic Acid from Fermentation Liquor of Molasses by Ion Exchange Method
Authors: Tsao June C. T. , Huang Ting‐Chia , Wang Chen‐Ping , Lin Kan
Published: June 2015

The extraction of itaconic acid from fermentation liquor by ion exchange method has been realized. Best results were obtained by first passing the fermentation liquor (diluted 3 times by water) through a column of cation exchange resin, Amberlite IR‐120, then through a column of strong basic anion exchange resin, Amberlite ira‐401, and eluting the itaconic acid out by 3N NaOH. The elution was complete when the volume of elutriant reached one‐half of the volume of the influent, in so far as the part already adsorbed on the resin is concerned. This brought the concentration of itaconic acid to two fold in a single run, and resulted in the decolorization at the same time.

It was found that Amberlite IR‐45 (OH) can also be used to extract the acid 100% complete, but the column used should be twice as long, and the volume of the 3N NaOH elutriant should be increased three times.

On account of the complicated nature of the molasses, the adsorption of the acid on the resins was only 57–66%complete. The improvement of the extraction by using methods such as selective coprecipitation prior to the extraction is under way.
Stereospecific Polymerization of Propylene with Natta Catalyst under Ordinary Pressure
Authors: Chia Kuei‐Shih , Wang Ung‐Ping
Published: June 2015

The stereospecific polymerization of propylene with Natta catalyst under ordinary pressure has been investigated and discussed. Propylene of 99.5% purity was polymerized with a metal‐organic complex catalyst, formed from A1(C2h5)3 and TiCl3, giving a white or greyish stereopolymer which contained ca. 70% isotactic polypropylene. The optimum conditions of polymerization were as follows: The mole‐ratio of Al(C2H3/TiCl3 was 8–15; the polymerization‐temperature was 70°C, and the concentration of TiCl3 was 0.6–0.8g per 120ml of n‐heptane. The maximum polymerization rate reached the value of 6g C3H6/hr./g TiCl3 and the apparent activation energy as calculated from an Arrheniusplotting line, was 12.1 kcal/mole.
Spectrophotometric Studies of Dioxo‐Complexes of Quadrivalent Metals III. The Ge(IV)—Gallein Chelate
Authors: Pan Kuan , Lin Cheng‐Yu , Fu Yi‐Chang
Published: June 2015

The chelate compound of germanium with gallein was spectrophotometrically studied in 0.18% dioxane solution. It was found that germanium and gallein formed a stable soluble complex in an acetate buffer of pH 5∼6. The ratio of germanium to gallein was estimated to be 1:2 by Job's continuous variations method. The instability constant of the chelate at 25°C was calculated as (6.13±0.10)×10−9at pH 5.56 and (4.24±0.10)×10−9 at pH 6.15, respectively.
Determination of Soil Potassium by Nondestructrive Activation Analysis
Authors: Ke Chiung‐Huei , Lin Ching‐Yü , Cheng Hwa‐Sheng
Published: June 2015

The method of Winchester(2) for the determination of potassium by nondestructive activation analysis has been applied to the determination of soil potassium. The experiments with seven soil samples of known potassium content gave good results. However, large discrepencies that existed between the nondestructive method and the flame photometry were shown by another set of twelve samples to be due to the statistical error in the activity measurements.
Some Bis(trimethylsiloxy)‐Compounds
Authors: Liu Sheng‐Lieh , Yahg Mei‐Fei
Published: June 2015

Four compounds of bis(trimethylsiloxy)‐ether type, including 1,4‐bis(trimethylsiloxymethyl)‐cyclohexane, 1,4‐bis(trimethylsiloxymethyl)‐benzene, 1,3‐bis(trimethylsiloxy)‐2,2‐dimethylpropane, and 1,3‐bis(trimethylsiloxy)‐2,2,4‐trimethylpentane have been synthesized and their properties compared with the Known compound 1,4‐bis(trimethylsiloxy)‐benzene.
The Alkaloid Content of the Chinese Drug “Moh‐ts'ao”, Desmodium Caudatum
Authors: Yeh Ping‐Yuan , Lin Lung‐Ching , Yang Shu‐Shu
Published: June 2015

The alkaloid content of the roots, the stems, and leaves of “Moh‐ts'ao”, Desmodium caudatum, was investigated. The crude alkaloid was isolated from the roots in a 0.12% yield and consisted of at least two kinds of alkaloids.

The oxalate, the reineckate, and two Kinds of picrate crystals were prepared from the crude alkaloid. The hydrochloride and the perchlorate could not be isolated in crystalline form. The decomposition of the oxalate gave one of the alkaloids in a pure state, as shown by paper chromatography.
Spectrophotometric Study of Cerium(III) and Thorium(IV) Chelates of trans‐I, 2‐diaminocyclohexane‐N, N, N′, N′‐ Tetraacetic Acid (DCTA)
Authors: Hseu Tong‐Ming , Young Chung‐Chang
Published: June 2015

Interaction between DCTA and Ce(III) ion has been investigated spectrophotometrically. It has been found that the Ce(III)‐DCTA chelate in aqueous solution (pH 4.25) exhibited a characteristic absorption maximum at 305 mμ. The absorption of Ce(III)‐DCTA chelate is considerably diminished by the addition of small amounts of Th(IV) ion. This phenomenon is used as the basis of a simple spectrophotometric scheme for the quantitative determination of Th(IV) ion and the evaluation of the formation constant of Th(IV)‐DCTA chelate. The composition of Ce(III)‐ and Th(IV)‐DCTA chelates were 1:1 and the corresponding formation constants (log Kf) of the chelates were 16.87 and 23.76 at 25°C and an ionic strength of 0.1 (KNO3), respectively. The application of this system to the determination of traces of Th(IV) ion has been demonstrated.
Coulometric Efficiency of Anodic Deposition and Cathodic Stripping of Bromide at Silver Electrode
Authors: Lin Zui Feng , Chen Li‐Shu
Published: June 2015

Anodic deposition and cathodic stripping of bromide at varying concentrations in 0.1 N KNO3 medium at silver electrode was studied by constant current method. The apparent coulometric efficiency could be explained with Laitinen's model. Modified Tafel plots were given and the transfer coefficient, α, was calculated to be 0.5 for the reversible anodic step. Two distinct steps in anodic deposition of bromide were definitely observed. Reduction of oxygen with low current density in 0.1 N KNO3 and at silver electrode was examined and was found to do no harm if deaeration was done by Meites technique. Constant current potentiometry model was proposed to explain the potential concentration relation.
Study on the Solvent Extraction with Radio‐Tracers. I. Extraction Study on Protactinium‐233 with the Noyltrifluoroacetone
Authors: Chen Ying‐Mao
Published: June 2015

Protactinium‐233, separated from the irradiated thorium, was used as a tracer for the extraction study with thenoyItrifluoroacetone. From the results obtained by the variation of acidities of HCl with the constant concentration of TTA in benzene, a slope of −2 was obtained by plotting the distribution coefficients against acidities. With a definite acid concentration of HCl in the aquous solution and by the variation of TTA concentration, a slope of 4 was obtained by plotting the distribution coefficients against the concentration of β‐diketone. With these results, species extracted by the organic layer was assumed to be Pa[TTA]2[HTTA]2. If the composition of the organic layer was changed by the addition of the following solvents into the TTA in benzene solution, the order of the extraction was found as follows:

n‐amyl alcohol > cyclohexane > chloroform > n‐hexane > carbon tetrachloride > benzene > nitrobenzene > hexone > cyclohexanone > n‐butyl alcohol.
Bis(diphenylmethylsiloxy)Benzenes
Authors: Liu Sheng‐Lieh , Chen Wan‐Fang
Published: June 2015

Three bis(diphenylmethylsiloxy)benzenes were sunthesized and their properties examined. The hydrolysis resistant character and cleavage reaction by hydroiodic acid were investigated.
Chemical Studies of Formosan Cobra (Naja Naja Atra) Venom: Part II. Isolation and Characterization of Guanosine, Adenosine, and Inosine from Cobra Venom
Authors: Lo Tung‐Bin , Chen Yee‐Hsiung
Published: June 2015

A non‐protein fraction from crude Formosan cobra venom was found to be a nucleoside mixture. The components were identified as guanosine, adenosine and inosine by paper chromatographic and polyamide thin‐layer chromatographic correlations and their spectroscopic data. The mole ratio of guanosine/adenosine/inosine was found to be 7:2.5:1.
Synthesis and Infrared Absorption Spectra of α‐methyl‐2′‐hydroxy‐chalcones: I. α‐methyl‐2′‐hydroxychalcone and its 4‐Substituted Derivatives
Authors: Lin Chi‐Hsiung , Yeg Chin‐Lung
Published: June 2015

Six 2′‐hydroxychalcone derivatives with a methyl group on the α‐position were synthesized. Infrared absorption spectra of these new compounds are discussed taking their corresponding α‐hydrogen chalcoes which were also synthesized for comparison. This latter study is also utilized as a proof for the structures of these compounds of a new series.
Absorption Spectra of 5′‐carboxy‐2′‐hydroxychalcone and its Derivatives
Authors: Lin Li‐Chih , Chen Fa‐Ching
Published: June 2015

Ultraviolet absorption spectra and infrared absorption spectra of 5′‐carboxy‐2′‐hydroxychalcone and eleven derivatives substituted at side benzene nucleus are measured to elucidate the spectroscopic effects of the 5′‐carboxyl group in this series of compounds.
Proanthocyanidin from Persimmon Fruits
Authors: Chen F. C. , Reese Elwyn T.
Published: June 2015

Degradative and other data described below have shown that the tannin of unripe fruits of persimmon (Diospyros virginiana) actually contains (+)‐gallocatechin unit in the structure and must be regarded as condensed flavonoid pigments, probably of similar structure to the polymeric proanthocyanidin from avocado seed.

The possible structure of the proanthocyanidin from persimmon fruits is proposed tentatively as a polymer of 5, 7, 3′, 4′, 5′‐pentahydroxyflavanonol.
Chemical Reactivity from Molecular Orbital Theory. Electrophilic Aromatic Substitutions
Authors: Chong D.P. , Mundhenk C.
Published: June 2015

A new method of correlating experimental reactivities with parameters calculated by molecular orbital theory, is proposed. In the case of electrophilic aromatic substitutions, this new approach shows significant improvement over the previous attempts.
Extraction of Vanadium with α‐benzoin Oxime Dissolved in Chloroform
Authors: Chen Shou Nan , Lin Eyih
Published: June 2015

The extraction characteristics of vanadium (V), with α‐benzoin oxime dissolved in chloroform have been investigated. The most favorable condition for the extraction has been found in the pH range of 1.8 to 2.4 and 2.6 to 3.0, corresponding to sulfate and HCI‐KCI used as a buffer, respectively, but the extracting power was found rather good when sulfate buffer was used.

A solution of 2×10−2 M α‐benzoin oxime in chloroform was used, and 1×10−4 to 2×10−2 M of vanadium (V) (added ac NaVO3) were used, and about 88% of vandium was extracted favourably by single extraction, and about 97% by double extractions.

The effects of shaking time, concentration of α‐benzoin oxime and diverse ions have also been investigated. Vanadium (V) can be readily extracted in the presence of copper (II), cobalt (II), nickel (II), aluminum (III), iron (III), silver (I), zirconium (IV) and chromium (III).
Kinetic Studies on the Esterification of Acid and Alcohol in the Presence of Dowex 50W and of Sulfuric Acid
Authors: Huang Ting‐Chia , Wan Jassen , Tsai Lung‐Hai
Published: June 2015

Several kinds of alcohol have been chosen to react with succinic acid, and several organic acids have been chosen to esterify with n‐butyl alcohol using either Dowex 50 W or sulfuric acid as catalyst. The rate constants are influenced by the temperature, the structure of reactants, and kinds of catalyst; the activation energies are also varied with different reactants and catalysts. The catalytic effect of hydrogen ion is not a simple form, and the possibility of exciting either the acid or the alcohol to its activated state was assured to be affected by their molecular structures. The values of ΔH*, ΔG*, and ΔS* of reactions have been calculated and discussed.
Study on the Analysis of Acrylonitrile Prepared from Liquefied Petroleum Gases by Gas Chromatography
Authors: Li Shih‐Chang , Huang Wu‐Tong
Published: June 2015

The principle product of acrylonitrile compounds could be analyzed by gas chromatography with fast, accurate and good results. The compounds which were made by liquefied petroleum gases (L.P.G.), ammonia and air with catalyst of Pt gauze at high temperature in the reactor, were identified and calculated according to their peak areas as following: hydrogen cyanide was 4.1% by volume, acrylonitrile was 75.7%, acetonitrile was 9.1% and ethylcyanide was 11.1%.
Polarized Raman Spectra II. Anthracene Crystal
Authors: Ting Chen‐Hanson
Published: June 2015

The polarized Raman spectrum in crystalline anthracene is recorded using an Ar+ laser as the light source. With the polarization data, empirical criteria of assigning molecular vibrations to Ag and Bsg representations are derived. These criteria are discussed in the light of the theory developed in Part I of this series.1

The lack of vibrational exciton structures in the spectrum of anthracene crystal is the strongest evidence to discredit the conventional polarizability theory and to support the theory presented in Part I.

The assignments of 11 Ag and 9 Bsg vibrations in anthracene‐h10, and also 12 Ag and 7 Bsg vibrations in anthracene‐d10 are reported.
Polyamide Layer Chromatography of Alkaloids
Authors: Hsiu Hsing‐Chien , Huang Jen‐Tzaw , Shih Tzu‐Bi , Yang Kun‐Lin , Wang Kung Tsung , Lin Alice L.
Published: June 2015

Thirty alkaloids were separated by polyamide layer chromatography. The Rf values on seven solvent systems were tabulated and their behavior discussed.
The Constituents of the Root Oil of Maclura Pomifera
Authors: Huang C. L. , Harwood A. A.
Published: June 2015

The fatty acids and the unsaponifiable matter in the root oil ofMaclura pomiferaRaf. were investigated. The root oil was saponified and the following fatty acids were identified: Myristic, oleic, and linolenic acid. Three crystalline substances; lupeol, β‐sitosterol and a new compound were isolated from the unsaponifiable matter of the oil. The NMR, UV and IR spectra of this new compound are reported.
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

Isopiestic 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

A 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

The 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

The 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

E. 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

This 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

The 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

A 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

Aniline 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

A 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

Hepatic 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

Conductivity 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

The 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

Distributions 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

A 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

The 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

Galvanostatic 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

The 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 aniline

Rp=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

A 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

The 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

The 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

The 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

Partial 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

Two 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

The 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

The 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

The 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

Chemical 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.