bluuebunny/crossref_metadata_2025_split huggingface dataset:
Studies on the Gummy Substances in Taiwan Cane Molasses. I. Precipitation of Gummy Substances at Various pH and Identification of Sugars and Amino Acids in the Gummy Substances by Paper Chromatography
Authors: Hsieh P.T. , Liau Y.H. , Yow Y.L. 
Published: June 2015

AbstractThe influence of the pH on the constituents of the gummy substance, precipitated by addition of ethanol, was investigeted. Paper chromatography was applied for the identification of the carbohydrates in the hydrolyzate of the gummy substance, and the presence of arabinose, galactose, xylose, and uronic acid was confirmed. The identification of amino acids was brought about by paper chromatography. The hydrolyzate gave eighteen spots and ten of them were identified as glutamic acid, cysteine, glycine, lysine, histidine, arginine, alanine, valine, leucine and aspartic acid.
Effect of Some Chemicals on the Production of Citric Acid by Aspergillus Niger
Authors: Wai Ngansiiou 
Published: June 2015

AbstractFor the production of citric acid by fermentation a strain of Aspergillus niger 4022‐15 was used. The composition of the basal culture solution was kept simple and contained only ammonium nitrate, potassium acid phosphate, magnesium sulfate and sucrose. Camphor 1‐2 ppm and zinc sulfate 10‐20 ppm were added to the basal solution to accelerate the production of citric acid. In the favourable condition 46% of sucrose was converted into citric acid.
Sucrose Inversion by Ion‐Exchange Resins (Effects of Salt‐Form Resins on Inversion Rate)
Authors: Hsieh P.T. , Su T. 
Published: June 2015

AbstractSucrose in aqueous solution was inverted with IR‐120‐H as catalyst. IR‐120‐K promoted the inversion brought about by IR‐120‐H, and the reaction rate increased almost lineally with increasing concentration of 1R‐120‐K. The effect of incorporating with IRA‐411‐C1 was also studied. With IR‐120‐H as catalyst, the rate of inversion was very slightly decreased by the presence of IRA‐411‐C1, while with IR‐120‐H and IR‐120‐K, the retarding effect seemed much more marked.
Preparation of Butylchlorosilanes and Butyl Silicone Oil
Authors: Cheng S. I. , Chien P. L. 
Published: June 2015

AbstractAttempt has been made to prepare some butyl silicones by polymerization of the hydrolysis product of butylchlorosilanes which were obtained by the action of the Grignard reagent on silicon tetrachloride.
Separation of Metals by Anion Exchange Resins. III. The Separation of UX1 from Uranyl Nitrate by Nitrate Elution Method
Authors: Chen Ying‐Mao 
Published: June 2015

AbstractThorium activity of atomic number 234 (UX1,) can be separated by anion exchange method. UX1 can be retained in the resin column of Amberlite IRA 400 in nitrate form when uranyl nitrate in 7.5 N nitric acid solution is allowed to pass through it. Uranyl ion absorbed is washed out of the resin column with the washing solution of nitric acid at the same concentration, while UX1 retained in the column can be recovered simply by using water as an eluent, The experimental results obtained by using batch method as well as column method suggest that the concentration of acid should be kept above 7 N if the recovery of more than 85% of UX1 in original uranyl nitrate solution is desired.Effects of the presence of anions other than nitrat ion in acid solution were studied by using batch method. The results indicate that, with the exception of phosphate and iodate, the anions under investigation did not produce any perceptible effect. The phosphate and iodate anions exhibited slightly less absorption in the resin phase. The anions studied include the phosphate, sulphate, bromate, iodate, chloride, bromide, iodide and oxalate○
Triterpenoids. II Isolation of Triterpenoid Sapogenins from the Fruits of Barringtonia Racemosa Blume
Authors: Lin Yau‐Tang , Lo Tung‐Bin , Su Su‐Chan 
Published: June 2015

AbstractTwo neutral triterpenoid sapogenins have been isolated from the fruits of Barringtonia racemosa, Blume. One of them, R2‐Barringenol is possibly identical with Barringtogenol (2:3:23:28‐tetra‐hydroxyolean‐12‐ene) and the other, R1‐Barrigenol: C30H50O7, is believed to be a heptahydroxy triterpenoid alcohol and is a member of the β‐amyrin series.
Physico‐Chemical Studies on Titanium Complexes. I. A Polarographic Study on Titanium Sulfo‐Salicylate
Authors: Pan Kuan , Lin Zui‐Feng , Shieh Kai‐Tee 
Published: June 2015

AbstractResults of a preliminary test for the polarographic reduction of titanium (IV) perchlorate, chloride and sulfo‐salicylate are reported. A single wave with half‐wave potentials ranging from −0.78 to −0.91 volts vs S.C.E. in the pH range 1.2‐2.1, is ascribed to the one‐electron irreversible reduction of titanium (IV) perchlorate and chloride complexes. Two waves have been observed in the c.v. curves of titanium (IV) sulfo‐salicylate in the presence of perchloric acid; the first with half‐wave potentials ranging from −0.37 to −0.41 volts vs S.C.E. is attributable to the one‐electron reversible reduction of titanium (IV) sulfo‐salicylate, and the second at −0.93 volt to the irreversible reduction of titanium (IV) perchlorate. Four waves, denoted by I, II, III and IV, with half‐wave potentials of ca. −0.20, −0.56, −0.80 and −1.0 volts vs. S.C.E. have been observed in the c.v. curves of titanium (IV) subsalicylate in the presence of hydrochloric acid. Wave I is the prewave of sulfo‐salicylic acid, wave II is attributable to the one‐electron reversible reduction of titanium(IV)‐sulfo‐salicylate, wave III to the nearly reversible reduction of titanium (IV) chloride, and wave IV to the reduction of basic or polymerized titanium complexes.
Dipole Moments and Hindering Effects of Some N‐Alcohols in N‐Hexane Solution
Authors: Lin Wei‐Chuwan , Tuan Fu‐Tai 
Published: June 2015

AbstractThe dielectric constants, specific volumes and refractive indices of n‐butanol, n‐hexanol and n‐decanol in n‐hexane solution have been measured at 25°C over a range of mole fraction from 0.01 to 0.08.The Kirkwood equation of dielectric polarisation of polar liquids has been applied to solutions of these alcohols. The dipole moments at infinite dilution μ∞ the moments in the gaseous state μ* and the moments in solution μ have been thus determined. A hindering parameter g was also calculated for solutions of the three alcohols named above in n‐hexane. This parameter is a direct measure of the extent and nature of molecular association. That the deviation of g from unity becomes less pronounced on going from n‐butanol through n‐hexanol to n‐decanol represents a decrease in the degree of hindered rotation with increasing chain length of alcohols.This was found in essential agreement with the tendency of variation of the slope in the P2‐x3 curves. All the three alcohols exhibit negative deviation of g from unity in n‐hexane solution, and the amount of deviation becomes greater with increasing mole fraction. These may be attributed to the association to polymeric alcohols in such a way as to screen their orientation from one another, leading to configurations with decreasingly smaller resultant moment with increasing concentration.
A Preliminary Study on the Liver Desoxynucleoproteins and Their Components
Authors: Cheng Chung‐Tao , Tu M. H. 
Published: June 2015

AbstractDesoxyribonuleoprotein was isolated from the liver of hog and duck by Mirsky‐Pollister's procedure with some modifications. After refining the extract, a white gel‐like material was obtained. From this material histones and DNA together with non‐histone protein were isolated by treatment with acid followed by fractional precipitation. The histones were hydrolyzed and the hydrolyzate was analyzed by paper‐chromatographical method. In the hydrolyzate, the presence of 16 amino acids (asp., glu., gly., ala., val., leu., ileu., ser., the., met., pro., phe., tyr., his., lys., and arg.) was identified. Among these the presence of 8 amino acids (asp., gly., leu., pro., try., his., lys., and arg.) was proved by comparing their respective Rf values with the authetic samples, while that of the remaining ones merely by noting their respective Rf values. The relative abundance of these amino acids in the histone was also estimated colorimetrically. The results furnish additional evidence in favor of the hypothesis that liver histones might be organ‐specific.
Spectrophotometric Determination of the Formation Constants of Cerium and Thorium Complexes of Ethylenediametetraacetic Acid
Authors: Kuan Pan , Hseu Tong‐Ming , Wu Ching‐Hsien 
Published: June 2015

AbstractA systematic ultraviolet spectrophotometric study of the versenate complexes of cerium[III] and thorium[IV] in acidic solutions of various ionic strengths has been made. It has been found that the cerium[III]‐versenate complex in aqueous solution exhibited a characteristic absorbancy maximum at 285 mμ, and that cerium[III] and versenate ion reacted in the ratio of 1:1 to form a complex. The reaction between thorium[IV] and versenate ion has been studied by means of the cerium[III]‐versenate complex as an indicator. The result also indicated that thorium and versenate ion reacted in the 1:1 ratio. The formation constants[log Kf] obtained at ionic strength of 0.1, 0.3 and 0.5 for the complexes were extrapolated graphically to infinite dilution to give the corresponding thermodynamic constants of 16.75 and 20.13 at 25°C, respectively. For the determination of very small quantities of thorium, the spectrophotometric titration of standard cerium[III]‐versenate complex solution with thorium nitrate solution was performed by using the absorption band of cerium [III]‐versenate complex as an indicator.
Synthesis of Chlorobutanol
Authors: Ho Chih‐Kuo , Wang Tsan‐Ching 
Published: June 2015

AbstractChlorobutanol was synthesized by condensing chloroform and acetone in the presence of potassium hydroxide in 28 experiments. The best result was obtained when powdered KOH was added to a mixture of acetone and chloroform, with the mole ratio CHCl3: Me2CO: KOH equal to 1:5:0.27, and the reaction temperature being kept at −5°C to 2°C. The yield attained 66.5% of the theoretical amount.
A Study of the Extraction of Thorium Nitrate With TBP
Authors: Pan Kuan , Chen Ying‐Mao , Lee Shu‐Ti 
Published: June 2015

AbstractThe distribution ratio (q) of the thorium nitrate TBP system has been studied by volumetric determination with EDTA and radiometric determination using UX1 as radio isotope tracer. The q value has been found to be directly affected by the concentration of nitrate and that of TBP. For solutions of the same concentration in nitric acid and sodium nitrate which has been slightly acidified, the latter gives higher q value.
The Oxidation of α, β‐Unsaturated Cyclic Acids by NaIO4‐KMnO4 Couple and KMnO4
Authors: Lin Yau‐Tang , Cheng Yu‐Shia 
Published: June 2015

Abstract1‐Cyclopentene carboxylic acid (I), 1‐cyclohexene carboxylic acid and (II), and 1‐cycloheptene carboxylic acid (III) were oxidized with NaIO4‐KMnO4 couple and acidic KMnO4. From I succinic acid was the main product and glutaric acid was the minor product. But in the case of II and III, the main products were adipic acid and pimelic acid respectively. Qualitatively there was no difference between NaIO4‐KMnO4 couple and acidic KMnO4 oxidation.
Paper Electrochromatographic Studies of Some Radioisotopes
Authors: Pan Kuan , Cheng Hwasheng 
Published: June 2015

AbstractThe electromigration behavior of 60Co, 90Sr, 90Y, 134Cs, 144Ce and 152Eu (+154Eu) as a function of pH in 1% citric acid solution has been studied. The cesium ion which migrated toward cathode decreased its mobility linearly as the pH increased. The strontium ion had the electromigration behavior similar to cesium ion up to pH 5 and changed the direction of migration to the anode at pH 4.5; the cobalt and rare earth ions, having the similar behavior, changed their ionic charges at pH's 2.2 to 3.2, respectively. By taking adventage of such behavior, cesium could be separated from bi‐ and tervalent metal ions at any pH value, whereas yttrium could be separated from strontium ions, and rare earth from cobalt ions only at low pH values.
Physico‐Chemical Studies of Hinokitiol. III. A Spectrophotometric Study of Titanium Complex of Hinokitiol
Authors: Hseu Tong‐Ming 
Published: June 2015

AbstractA spectrophotometric study of complex formation between titanium (IV) and hinokitiol (β‐isoproyl tropolone) was made over a pH range of 1.15 to 5.60 at 25°. In a 50% dioxane‐water medium, a soluble yellow complex was formed between Ti (IV) and hinokitiol, which had two absorption maxima at 383 mμ and 335mμ. The optimum pH was 3.50 to 3.70 and the mole ratio of Ti (IV) to hinokitiol was 1 to 3. Its stability constant was found to be 8.99×1028 at ionic strength 0.01, and the chemical formula was presumed to be [TiOH(C10H11O2)3]0. By using the wave length of 383 mμ, determination of trace amount of titanium (IV) with the sensitivity of 0.036 r/cm2 was possible.
Direct Complexometric Titration of Zirconium with Versene Using Gallein as Indicator
Authors: Sun Peng‐Joung 
Published: June 2015

AbstractGallein (pyrogallolphthalein) has been first introduced as a metal indicator in the complexometric titration with EDTA (ethylenediaminetetraacetic acid) and successfully applied to the titration of zirconium. A method for the direct titration of zirconium with Versene (the disodium salt of EDTA) was proposed. A soluble complex of 1:1 zirconium‐Versene was formed during titration. Gallein indicator changed its color from orange red to a clear golden yellow at the end point. Stoichiometric results were brought about within the pH range 0.5∼1.6. The sharpest color change was around pH 1.0. The titration was carried out in hydrochloric acid medium. The effect of the presence of various foriegn ions in approximately equimolar proportions on the titration was observed. Forty‐eight ions were tested. Among these only the following were found to interfere: antimony (III), cerium (IV), chromate, fluoride, iron (III), molybdenum (III), molybdate, oxalate, permanganate, phosphate, sulfate, tartrate, tin (II, IV), titanium (III) and vanadate.
Separation of Carrier‐Free Yttrium‐90 from Strontium‐90 a Radiocolloidal Method
Authors: Cheng Hwasheng 
Published: June 2015

AbstractThe separation of 90Y from 90Sr was carried out by ethanol‐ and methanol‐water systems from NH4‐form Dowex 50‐X4 columns. Maximum fractions of radiocolloidal 90Y was eluted by using 50% solvent solutions. Using 20, 50, and 80% aqueous ethanol as solvent, the eluted activities were 2, 18 and 13% respectively, and with 20, 50 and 80% aqueous methanol, the activities were 2, 7, and 4% respectively. Fractional conversion of ionic yttrium to radiocolloids was observed and the anormal adsorption of radiocolloids in the column was thought to be due to the growing agglomerates retained in the canals in the resin beads.
Isolation of Actinomycetes and Purification of its Antibiotic. II. Isolation and Properties of Crystalline Antibiotic
Authors: Lil Peh‐Wung , Chiu Teh‐Hsing 
Published: June 2015

AbstractThe isolation of the antibiotic produced by Streptomyces fimicarius 007 was carried out by extracting the culture filtrate with ethyl acetate followed by evaporating off the solvent. The crude antibiotic thus obtained, after extraction with petroleum ether, was dissolved in benzene and chromatographed through alumina column with a mixture of acetone and benzene as effluent. The crystalline antibiotic was obtained from the acetone solution by gradual addition of petroleum ether. The purified product crystallized in vermillion platelets. Its alcoholic solution showed strong absorption bands at 450–454 mμ and 232–241 mμ. The properties of this antibiotic was found to be very similar to those of actinomycins. It is surmised that the antibiotic might be a kind of actinomycin.
A Study of the Silver‐Silver Selenite Electrode
Authors: Lin Jeong‐Long , Pan Kuan 
Published: June 2015

AbstractThe electromotive force of the cell,Pt/NaHSeO3, QH/Ag2SeO3(s)−Aghas been calculated from the cells,Hg‐Hg2Cl2(s)/KCl(satd.)/KNO3(m)/NaHSeO3(m)/Ag2SeO3(s)‐Ag,and Hg‐Hg2Cl2(s)/KCl(satd.)/KNO3(m)/NaHSeO3(m), QH/Pt at 25°C in concentrations of sodium biselenite, ranging from 10−2 to 10−3 M.The standard potential of Ag‐Ag2SeO3/SeO3 = electrode has been determined as E°= −0.3629 volt. The solubility‐product constant of silver slenite and the activity coefficient of selenous acid at varying concentrations have been evaluated.
Physico‐Chemical Studies of Hinokitiol. IV. Spectrophotometric Study of the Chelate Compounds of the Group IVB Metals with Hinokitiol
Authors: Hseu Tong‐Ming 
Published: June 2015

AbstractStability constants of titanium (IV), zirconium and thorium‐hinokitiolate chelates have been calculated from spectrophotometric data in 50% ethanol‐water solution at 25°. It has been found that the stability constant and the optimum pH of the various metal chelates increase with the increase in the atomic number of metals. The order of stability for the metals is the same as that found for other types of coordinating agents. Zirconium and thorium combine with four hinokitiolate ions, while titanium (IV) combines with only two hinokitiolate ions to form a chelate compound. A list of molar absorption coefficients is given and the photometric sensitivities of these metals with hinokitiol were determined.
Analytical Studies of Dipicrylamine. I. pH‐Metric Study of Dipicrylaminate
Authors: Lin Zui‐Feng 
Published: June 2015

AbstractDipicrylaminate can be determined by pH‐metric titration with strong mineral acids in aqueous solution. The end point is sharp if the concentration of dipicrylaminate exceeds 10−3M. The reaction consists of the replacement of metal ion by hydrogen ion.The solubility product, Ksp, and the dissociation constant, Ka of dipicrylamine were evaluated from the titration data. pH‐metric kinetic study of the recombination of dipicrylaminate ion with hydrogen ion was also carried out, from which the specific reaction rate constant was evaluted.
The Constituents of the Chinese Drug “Jin‐Sen” Panax Ginseng C. A. Mey
Authors: Lin Yau‐Tang 
Published: June 2015

AbstractA preliminary result of the chemical study of the constituents of the extractive of Ginseng was reported. Stigtnasterol was identified from the ether soluble fraction and two crystalline genins were obtained from the saponin fraction. One of them was identified as oleanolic acid.
Studies of the Solution Polymerization of Vinyl Acetate in the Aqueous Solution of Partially Acetylated Polyvinyl Alcohol. V. The Radiation‐Induced Graft Copolymerization
Authors: Lin Chen‐Chong 
Published: June 2015

AbstractGraft copolymerization is induced to a considerable extent when vinyl acetate is polymerized in an aqueous solution of polyvinyl alcohol or partially acetylated polyvinyl alcohol under gamma irradiation. Such γ‐induced graft copolymerization is affected by hydroquinone. The graft efficiency,fac, increases as PVA concentration is increased. However, it reaches a critical value at 4% and decreases again in more concentrated solutions. On the other hand, the graft efficiency,fa, decreases with increasing PVA concentration. It is found thatfacdecrease with increasing field intensity of irradiation at a definite total exposure dose. The mechanism consistent with these observations is presented.
Oxidation Potential of the Cerous‐Ceric Electrode in Dilute Sulfuric Acid Solutions
Authors: Pan Kuan , Hsieh Kai‐Tee , Ting Chen‐Hanson 
Published: June 2015

AbstractThe oxidation potential of the Ce(III)‐Ce(IV) couple in sulfuric acid over the concentration range of 0.05 to 0.5F was observed at 25°C by using the Pt‐PbO2/PbSO4, SO4 = electrode as the reference electrode. The free energy change for the reaction 2Ce+3 + PbO2 + 4H+ + SO4 = 2Ce+4+PbSO4+2H2O was estimated.
Polarisability of Some Organic Liquids from Polarisation at Optical Frequency
Authors: Lin Wei‐Chuwan , Lue Ping‐Chang 
Published: June 2015

AbstractRefractive indices of a series of binary solutions: water‐p‐dioxane, p‐dioxan‐ethyl alcohol, ethyl alcohol‐chloroform, p‐dioxane‐cyclohexane and cyclohexane‐aniline, were measured to determine polarisability of the related organic liquids with the use of Böttcher's formula for refraction of mixture, on the basis of water data obtained by the liquid‐temperature method.
Study of the Nature of Silicon in Rice Hull. II. Polymerizing Tendency of the Dissolved Silanolates
Authors: Liu Sheng‐Lieh 
Published: June 2015

AbstractAqueous solution of soluble silanolates from rice hull, kept at varying pH values, were deionized. Solid insoluble polymerization products were invariably obtained. Attempts were made to inhibit the polymerization and to enable the isolation of lower polymers by the use of trimethychlorosilane. But the results indicated that polymerization had taken place to a great extent before the latter reagent could convert the silanolates to non‐polymerizable products.
Essential Oils, XI. A New Type of Perilla Oil Containing Dillapiole as the Main Constituent
Authors: Yeh Ping‐Hsien 
Published: June 2015

AbstractA new species of perilla grass tentatively termed “Perilla dillapioliferum Yeh,” afforded, on steam distillation, 0.1‐0.15% essential oil containing 0‐3% dipentene (VI), 0‐3% methyleugenol (X), 24% α‐ and β‐caryophyllenes (VII) and 63.3% dillapiole (XII).This is the first perilla oil which has been ever found to contain an aromatic compound as its main constituent. It is also noted that P. dillapioliferum occupies taxonomically a unique position, as differing from all hitherto known species of Perilla plants.
Chromatographic Fractionation of Non‐Nitrogenous Organic Acids in Taiwan Sugar Cane by Silica Gel Column
Authors: Hsieh Po‐Tung , Huang I‐Yih , Shih Tuo‐Shi , Huang Kuo‐Hong 
Published: June 2015

AbstractPartition chromatography on silica gel columns has been applied to isolate and identify some of the hitherto undetected non‐nitrogenous organic acids present in sugar cane juice. In this experiment, nine organic acids were identified from Taiwan sugar cane, F 127 and N:CO 310, and eight of them from F 126. They are mesaconic, syringic, fumaric, succinic, aconitic, glycolic, malic, citric and oxalic acid. Among these, mesaconic acid was not identified by comparing with the authentic acid, but was indirectly identified from the position of its peak effluent volume. Though the crystal of syringic acid could not be obtained, the position of its peak was definitely identified by that of the authentic acid‐Other acids were identified by the mesurement of their respective Rf values, the microphotographs of the crystal shape, and the determination of the melting points.According to the results, the recovery of all the non‐nitrogenous organic acids present in the sugar cane was almost quantitative with the exception of oxalic acid, the result of which was obviously erratic. Other acids were recovered with excellent rates ranging from 96.9% to 102% In three varieties of sugar cane, F 126, F 127 and N:CO 310, the aconitic acid was the highest content, those of citric, glycolic, malic and oxalic acid came next. The contents of the other acids were comparatively low.
A Polarographic Study of Gallein
Authors: Sun Peng‐Joung , Pan Kuan , Yew Fu‐Hsie , Huang Teh‐Shoon 
Published: June 2015

AbstractGallein was polarographically studied in 40% ethanol solutions containing sodium carbonate or poassium biphthalate buffers at varying pH's. A well‐defined polarographic wave with E1/2 ranging from −0.50 to −0.70 volt (S. C. E.) was observed in the pH. region 2∼ 6.6 while two waves with E1/2 at −1.2 and −1.5 volts (S. C. E.) were observed in the pH region of 8.3 to 10.2 at 25°C.The former corresponds to a one‐electron reversible reaction while the latter ones may be irreversible.Gallein was polarographically determined in 40% ethanol solution over the concentration range of 3×10−4 to 2×10−5 molar.