bluuebunny/crossref_metadata_2025 huggingface dataset:
The Content of Uranium in Quartz Occurring in Some Localities of Taitung
Authors: Cheng Hwa‐Sheng , Lin Ching‐Yü , Ke Chiung‐Huei
Published: June 2015

Radioactive minerals other than Hokutolite and monazite are unknown up to present in Taiwan. The hard green copperiferrous quartz found in north Taitung and collected by two field survey teams, exhibited measurable activity, the origin of which was found to be uranium. Activation analysis revealed that the content of uranium in these samples ranged between 0.002 and 0.035%. It was also found that uranium was accompanied with copper, and that inclusion of iron in the sample decreased the uranium content. The result will be of value in the understanding of the cause of concentration of uranium in quartz and its physical and chemical state in these samples. The content of uranium in talc and monazite concentrate was also determined.
Osmotic and Activity Coefficients of Copper(II)‐Perchlorate from Freezing‐Point Measurements
Authors: Pan Kuan , Huang James Jan‐Tsyu
Published: June 2015

Osmotic coefficients and activity coefficients of copper(II)‐perchlorate were calculated from freezing‐point depression in aqueous solutions of 1×10−2∼5×10−1 molal Cu(ClO4)2 by the warming curve method, using a thermistor as the temperature sensitive element.
Conductivities of Copper(II)‐Perchlorate and Chloride
Authors: Pan Kuan , Chang Chen‐Fee , Cheng Bao‐Ding
Published: June 2015

The limiting equivalent conductivities Λ° of aqueous Cu(ClO4)2 and CuCl2 were found to be 121.0 and 130.0 cm2 ohm−1 equiv−1, respectively, at 25°C. The limiting equivalent conductivity of Cu++ ion was calculated as λcu++=53.6 cm2 ohm−1 equiv−1, and the limiting transference number, T01, of Cu++ ion was calculated as 0.4430 for Cu(ClO4)2 and 0.4123 for CuCl2.
A Polarization Study of Molecular Addition Complexes of Aromatic Hydrocarbons with Polynitrobenzenes at Optical Frequency
Authors: Lin Jar‐Shyong , Lin Wei‐Chuwan
Published: June 2015

The polarizabilities of molecular addition complexes formed with polynitrobenzenes and aromatic hydrocarbons were determined experimentally at optical frequency. The molecular polarizabilities of the related components were also determined.

The results obtained were found to be qualitatively consistent with one another.

The polarizability of the complexes was discussed in terms of the resonance between the no‐bond structure and the charge‐transfer structure.
Effects of Electron Beam Irradiation on Polyvinyl Chloride
Authors: Yeh Si‐Jung , Chen Tsan‐Jan
Published: June 2015

Thin films of fractionated polyvinyl chloride were irradiated both in the air and in vacuum with electron beam of different dose rates generated by Van de Graaff generator. The dose rates used in this study ranged from 3.97×103 rads/sec. to 3.47×104 rads/sec. The temperature of irradiation was kept below 30°C to eliminate the heat effect due to electron beam irradiation. The molecular weights of the irradiated ploymer were estimated by measuring the viscosity of irradiated polyvinyl solution chloride in cyclohexanone. The estimation was carried out immediately after irradiatino to avoid the post irradiation effect.

When the polyvinyl chloride was irradiated in the air with the dose rate below 2.27× 104 rads/sec, the molecular weights of irradiated polyvinyl chloride decreased gradually. Beyond the total dose of 3.4×106 rads, however, the molecular weights of irradiated polyvinyl chloride began to increase. Nevertheless, when the dose rate higher than 2.87×104 rads/sec was applied, the molecular weights of the irradiated polyvinyl chloride increased as soon as the polymer was subjected to irradiation. In all case studied the molecular weights of polyvinyl chloride increased rapidly beyond the total dosage of 5×106 rads, and the polymer became insoluble when the total dosage reached 7×108 rads. More clear cut trend was observed when the polyvinyl chloride was irradiated in vacuum.
Isolation and Amino Acid Composition of Human Milk Casein and its Components
Authors: Chen Joseph S. , Ting Wen‐Kuo
Published: June 2015

A modified procedure is described for isolation of whole human milk casein.

Human milk casein has been separated into three fractions. The gamma fraction was found to be more abundant than the beta‐fraction, while the alpha‐fraction occurred only in tracer amount.

The amino acid composition, electrophoretic mobilities, and the side chain groups of the human milk casein and its fractions have been determined.
Polyamide Layer Chromatography. Identification of Amino Acids in Angelica acutiloba Kitagawa via DNP Derivative
Authors: Lin Yau‐Tang , Wang Kung‐Tsung , Wang Iris S. Y.
Published: June 2015

Eighteen amino acids; proline, alanine, valine, leucine, isoleucine, hydroxyproline, phenylalanine, ornithine, glycine, serine, aspartic acid, glutamic acid, threonine, asparagine, lysine, tyrosine, tryptophan, and arginine were identified by polyamide layer chromatography via DNP (dinitrophenly) derivatives in Angelica acutiloba Kitagawa (Tang‐Kwei)
Chemical Studies of Formosan Cobra (Naja naja atra) Venom. Part I. Chromatographic Separation of Crude Venom on CM‐Sepadex and Preliminary Characterization of its Components
Authors: Lo Tung‐Bin , Chen Yee‐Hsiung , Lee Chen‐Yuan
Published: June 2015

The crude venom of Formosan cobra (Naja naja atra) was separated into 12 fractions by CM‐Sephadex (C‐50) chromatography with ammonium acetate buffer by two‐stage gradient elution.

Fr. I was proved to be a mixture of nucleotides and nucleosides. The toxicity was found in Fr. VIII (neurotoxic), X (cardiotoxic), XI (cardiotoxic), and XII (cardiotoxic). Glycerophosphatase, alkaline phosphomonoesterase, and 5′‐nucleotidase were found in Fr. III, V and IX, respectively. Phosphodiesterase was distributed in Frs. VI and VII, while lecithinase‐A (phospholipase‐A) was found in Frs. IV and V.

Frs. VIII, IX and XII seem to be homogenous by the n‐terminal analysis and the paper electrophoresis.
Polarographic Behavior of Bivalent Germanium in Alkaline Solution
Authors: Pan Kuan , Huang Jan‐Tsyu
Published: June 2015

Bivalent germanium was polarographically studied in sodium hydroxide solution at various concentrations. A well‐defined reduction wave with half‐wave potential varying from −0.90 to −0.98 volt vs. S.C.E. was observed for 1×10−4 M Ge(II) in concentration range of 0.2 to 2.0 F with respect to NaOH, and from −0.70 to −0.88 volt vs. S.C.E. in the pH range 9.0–12.1 at 25°. The value of id/C is 5.43 μα/mM and that of id/C mfor t1/8 is 5.21. Dependence of E1/2 upon pH is expressed by —E1/2 =0.18+0.058 pH. Experimental result suggests that the reaction proceeds in two‐steps involving an irreversible two‐electron reduction: Ge(OH)2+OH−→HGeO2−+H2O and HGeO2−+H2O+2e→Ge0+3OH−.
Study on the Solvent Extraction with Radio‐Tracers. II. Solvent Extraction of Polonium‐210 from Irradiated Bismuth with tri‐n‐butyl Phosphate
Authors: Chen Ying‐Mao
Published: June 2015

Extraction study on polonium from large amounts of irradiated bismuth was made with diluted TBP solution. Polonium used in this work was Po‐210, which was prepared by the irradiation of bismuth according to the following nuclear reaction, . From this study the following extraction conditions were obtained.

Extraction from 7 N HCl was found to be most suitable.

Degree of the dilution of TBP with diluent was studied and TBP concentration at about 10% was found to be most effective.

With various kinds of the solvent as diluent, the following order of the extraction was found: o‐xylene>carbon tetrachloride>benzene>amy1 alcohol>chloroform.

Extraction of polonium with 10% TBP in o‐xylene from 7 N HCl solution, more than 85% was found to be extracted with a single extraction. Under these conditions only a negligible amount of bismuth was extracted. Thus, the separation of these two elements was attained with this method.

From the study on the distribution coefficients dependence on the variation of the concentration of TBP or acidities, the species extracted by the organic layer was considered to be PoCl4·2TBP when TBP concentration was less than 50% TBP, but PoCl4·TBP when larger than 50% TBP.
Field Sweep Spin Decoupling of Weakly Coupled Unsymmetrical Three‐Spin System
Authors: Lin Wei‐Chuwan
Published: June 2015

Proton magnetic resonance spectrum of 25% (volume) methyl 2,3‐dibromopropionate in benzene exhibits a typical ABC pattern in which the four strong lines from each nucleus can be immediately recognized. The assignment of spectral lines and the determination of energy‐level diagram were thus straightforward.

Field‐sweep spin decoupling experiment with respect to the outer transition‐square of the sample was found to be in complete analogy with two‐spin AX system. However, spin decoupling with respect to the inner transition‐square reveals a weak satellite line on each side of the decoupled A (or C) signal. These weak satellite lines are found to be due to JAB (or JBC) and may prove to be useful for the direct determination of JAB and JBC.
Activity Product Constant of Barium Rhodizonate
Authors: Pan Kuan , Chou Tzi‐Shan , Huang Teh‐Shoon
Published: June 2015

Electrolytic behavior of rhodizonic acid (H2Q) was polarographically studied in a series of acetate buffers and ammonium buffers of various pR values at 20°, 25°, 30° and 35°. Two well‐defined waves were observed in the pH range of 1∼5 and 8∼9.4, but only one wave was observed in the pH range of 5.5∼7.0. Polarographic and conductometric titrations of rhodizonate with barium chloride and the reverse titration indicate the formation of BaQ. Solubility product constant Ksp and activity product constant Ko of BaQ were evaluated from the polarographic data at various temperatures, and were found to be log and log
Electroosmosis and Electrophoresis in Paper Electrochromatography of Uranyl Ion in Semicarbazide Hydrochloride Solution
Authors: Lai Tsai‐Teh , Wu Che‐Kuang
Published: June 2015

Paper electrophoresis in semicarbazide hydrochloride solution has shown that uranyl ion forms unit positively charged complex at pH 2.25. In 0.4 M hydrochloric acid, no detectable uranyl‐chloro complexes were formed. Electroosmotic flow created a water film extending from the cathode to the anode, and rendered the transference number of uranyl ion to zero at the margin of the water film. An improved method of paper chromatography was presented.
Some Tri‐ and Tetra‐Xylenoxysilanes
Authors: Liu Sheng‐Lieh , Ho Chin‐Hsia , Lin Te‐Fu
Published: June 2015

Isomeric trixylenoxysilanes and tetraxylenoxysilanes are synthesized to compare with the previously investigated dixylenoxy compyunds. As a result, characteristic absorption of Infrared at 960–950 cm−1 was proved and increase in density, refractive index, and elevation of boiling point are observed.
Synthesis of 2,4‐xylenoxysilanes
Authors: Liu Sheng‐Lieh , Lin Te‐Fu
Published: June 2015

Six compounds of 2,4‐xylenoxysilane have been synthesized, and their physical properties are examined. Although 2,4‐xylenol is the only liquid compound among their six isomers, the 2,4‐xylenoxysilanes did not show different character as compared with other xylenoxysilanes which are derived from solid xylenols.
Determination of Vapor Phase Diffusivity for Toluene‐Air System and for Benzoic Acid‐Air System
Authors: Yuan H. C. , Cheng M. H.
Published: June 2015

There are several methods available for determination of diffusion coefficients. Stefan diffusion tube was most widely used for the measurement of vapor phase diffusivity in binary systems. It was proved theoretically that the radial concentration profile may be negligible in a thin cyclindrical section. It was also shown theoretically that the velocity profile does not affect the mass flux. This report considered longtitudinal diffusivity alone. The diffusivity of toluene‐air system was measured from 40°C to 70°C and that of benzoic acid‐air system was estimated from 140°C to 160°C.
Synthesis and Infrared Absorption Spectra of 5′‐methyl‐2′‐hydroxychalcones: I. 5′‐methyl‐2′‐hydroxychalcone and its 4‐Substituted Derivatives
Authors: Lin Chi‐Hsiung , Lin Chhiu‐Tsu , Yeh Chin‐Lung
Published: June 2015

Seven 2′‐hydroxychalcone derivatives with a methyl group on the 5′‐position were synthesized. Infrared absorption spectra of these new compounds are discussed.
The Stabilities and Thermodynamic Properties of Copper (II), Zinc (II) and Cadmium (II) Chelates of trans‐1,2‐diaminocyclohexane‐N, N, N′, N′‐tetraacetic Acid
Authors: Hseu Tong‐Ming , Wu Shao‐Chung
Published: June 2015

Interactions between trans‐1,2‐diaminocyclohexane‐N, N, N′, N′‐tetraacetic acid (H4DCTA or H4Z) and Cu(II), Zn(II) and Cd(II) ions has been investigated. The formation constants of the hydrogen chelates (MHZ−), and of the normal chelates (MZ2–), have been evaluated at 10°, 20°, 30° and 40°C, and an ionic strength of 0.10(KNO3). The former was done by a titration technique and the latter by a mercury indicator electrode technique. Enthalpy and entropy changes characterizing the formation of the normal chelates have been calculated at 25°C.
Supplementary Observations on the Chemistry of the Alkaloids of Berberine Series. II. The Ultraviolet Absorption Spectra of Berberines and Related Compounds
Authors: Sebe Eigai , Abe Seishi , Murase Noriyoshi , Shibata Yoshi
Published: June 2015

The ultraviolet absorption spectra of berbines and ϕ‐berbines consist of a single, weak and narrow band in which λmax position dependeds on the kind of auxochrome group i. e., methylenedioxy‐or dimethoxy group attached to 2–3 position. The effect of the auxochrome group at 11–12 position or 12–13 position is very small.

The shape of the band of oxyberberine, oxy‐ϕ‐berberine and oxyprotoberberine are similar, especially those of the latter two substances resemble closely.

Comparing with isoquinoline, the bands (b), (c) and (d) of G‐berberines and protoberberine are considered as characteristic of isoquinoline structure, while the band (a) in visible region is of berberinium structure, however, the absorption curve of ϕ‐berberines does not show any characteristic of isoquinoline or berberinium structure.
Cation Exchange Behavior of Actinium‐228 in Mixed Solvent Systems Consisting of Methanol‐Thiocyanate‐Water
Authors: Chen Ying‐Mao , Shu Rei‐Yuan
Published: June 2015

Cation exchange behavior of actinium‐228 in mixed solvent system consisting of methanol‐thiocyanate‐water was studied with Dowex 50 resin. Solvent systems containing 50 to 90% methanol and concentration of thiocyanate from 1F to 5F were used. The distribution ratios of actinium between resin and the solutions were estimated by batch equilibrium and elution peak methods. By plotting these distribution ratios for each solvent system against the concentration of thiocyanate, different correlations were found. The difference may be attributed to the fact that the different species were absorbed by the resin. Feasibitity of using the mixed solvent system to the separation of actinium from thorium, was also examined.
Chemical Studies of Formosan Cobra (Naja Naja Atra) Venom Part IV. Estimation of molecular weights of some purified protein fractions by sephadex gel filtration
Authors: Chang Qui‐Linn , Hu Chung‐Yuan , Lo Tung‐Bin
Published: June 2015

Molecular weights of four purified fractions, Fractions VIII (cobraneurotoxin), IX (5′‐nucleotidase), XI (cardiotoxin) and XII (cardiotoxin) of Formosan cobra venom were estimated by gel filtration on Sephadex G‐100 and G‐75 columns.
Chemical Studies of Formosan Cobra (Naja Naja Atra) Venom. Part V. Properties of 5′‐Nucleotidase
Authors: Chen Yee‐Hsiung , Lo Tung‐Bin
Published: June 2015

The chromatographically, disc and microzone electrophoretically homogeneous 5′‐nucleotidase of Formosan cobra venom was prepared. This enzyme has molecular weight of about 10,000 as estimated by gel filtration and by total amino acid analysis. Maximal activity was exhibited between pH 6.5 and 7.0 in 0.1 M Tris‐malonate buffer. Mn++ and Mg++ ions enhance the activity. The maximal enhancement was obtained at the final concentration of 10−3 M regardless of substrate concentration. Ni++ and Zn++ ions inhibit the activity. It is heat stable up to 50° C for 2 min but complete inactivation occurs at 80° C. It shows a high specificity for hydrolysis of ribonucleoside‐5′‐phosphate but shows only 20% and completely inactive to deoxyribonucleoside‐5′‐phosphate and 2′‐or 3′‐nucleotide, respectively. Apparent Km and Vmax values were also determined for AMP, GMP, UMP and CMP.
Analysis of the Electronic Spectra in Polyphenyls
Authors: Ting Chen‐Hanson
Published: June 2015

Though the spectra in polyphenyls are often broad and structureless, the general pattern of these spectra is very similar to those in polyacene series. The systematic behavior of the α, p, and β bands in p‐polyphenyls can be explained in terms of simple MO theory with the first order configuration interaction. The behavior of the p and β bands can also be approximately calculated by straightforward exciton theory. The usefulness of the exciton theory is best demonstrated in the case of m‐polyphenyls.
Sydnones IV. Synthesis of Sydnones Analogous to the Photochromic Compounds
Authors: Tien Jack M. , Hunsberger I. M.
Published: June 2015

N‐(6‐methoxy‐3‐pyridyl)‐sydnone (I), N‐(4‐nitrobenzyl)sydnone (II‐1), and N‐(2‐nitrobenzyl)sydnone (II‐2) have been prepared. Condensation of 2, 4‐dinitrochlorohenzene with N‐(carbethoxymethyl)sydnone (II‐4) produced N‐[(2, 4‐dinitrophenyl) carbethoxymethyl]‐sydnone (II‐5). Under normal conditions none of them are photochromic.
Isomerization of Chemically Activated Methylcyclopropane and the Ratio of Trans‐ to Cis‐2‐Butene
Authors: Ho Shih‐Yeng
Published: June 2015

The isomerization of vibrationally excited methylcyclopropane and the trans‐ to cis‐2‐butene ratio were studied as a function of pressure at room temperature. The ratio is larger than unity at low pressures and within experimental error is about constant and close to unity at high pressures.
Studies on Polymerization of Vinyl Compounds Initiated by Metal Chelate I. Polymerization of Methyl Methacrylate with Ni (II) Benzoyl Trifluoroacetonate as an Initiator
Authors: Chen Chih‐Tsung , Lin Pi‐Chou , Hsieh Nang‐Chang
Published: June 2015

The polymerization of methyl methacrylate with Ni (II) benzoyl trifluoroacetonate was investigated. The rate of polymerization was proportional to the square root of the initiator concentration and 1.5 power of the monomer concentration. The activation energy for the overall polymerization was 13.4 Kcal/mole, which yields 17.6 Kcal/mole for the activation energy and 9.58 × 105 sec−1 for the collision frequency factor for the initiation.
Synthetic Studies of Nitro‐Chlorotropones and Trihalotropones
Authors: Hsiang Shi‐Fen Lin , Yang Paw‐Wang , Pan Shii‐Jeou , Chien Ching‐Ying , Chou Shine
Published: June 2015

Nitration of 2‐chlorotropone with fuming nitric acid gave 2‐chloro‐ 4,7‐dinitrotropone in good yield. 2,4,7‐Trichlorotropone, a new compound, and 2,4,7‐tribromotropone have been derived successfully from 2‐chloro‐4,7‐dinitrotropone by heating with hydrogen chloride or hydrogen bromide in acetic acid. The structures of 2‐chloro‐4,7‐dinitrotropone, 2,4,7‐trichlorotropone and 2,4,7‐tribromotropone have been confirmed on the basis of chemical facts together with the spectroscopical evidences. The chemical and physical properties of the above compounds have also been investigated.
Synthesis of Ethyl 7‐Flavonol‐Oxyacetates
Authors: Hsu K. K. , Chen F. C. , Lo M. S.
Published: June 2015

Ten new methoxy‐, nitro‐, and halogen substituted 2′‐hydroxy‐4‐carbethoxymethoxychalcones have been prepared by the condensation of 2‐hydroxy‐4‐carbethoxymethoxyacetophenone with substituted benzaldehydes. These chalcones have been converted to the corresponding flavonols.
Polarized Raman Spectra VI. A Short Note on the Raman Spectra of p‐Polyphenyls
Authors: Ting Chen‐Hanson
Published: June 2015

The Raman spectra of the p‐polyphenyls: benzene, biphenyl, p‐terphenyl, and p‐quaterphenyl, are compared with their electronic spectra. The relative intensity of the double bond stretching mode around 1600 Kaisers to that of the breathing mode around 1000K increases steadily when the phenyl chain is lengthened. This intensity ratio can be calculated using our theory proposed previously.1 The results are in very good agreement with the experimental observations
Polarized Raman Spectra VII Correlations and Assignments of Raman Lines in p‐Polyphenyls
Authors: Leu An‐Lu , Ting Chen‐Hanson
Published: June 2015

The Raman spectra of powdered biphenyl, p‐terphenyl, and p‐quaterphenyl are compared with each other and also with the Raman spectrum of benzene. Most Raman lines in polyphenyls can be considered as derived from normal vibrations in benzene. The intense lines are thus assigned and the correlations between them are established.
The Photochemical Reactions of Ketene‐Benzene Mixture
Authors: Hwang Der‐Yan , Ho Shih Yeng
Published: June 2015

In the photolysis of ketene with benzene in the gas phase, Cycloheptatriene (CHT) and totuene (Tol) have been observed as the products. The ratio, (CHT)/(CHT)+(Tol) are studied at various conditions. The difference of activation energy of formation between toluene and cycloheptariene is evaluated to be 4.76 kcal/mole.
The Molecular Structure of Cyclopropene as Determined by Electron Diffraction
Authors: Chiang Joseph F.
Published: June 2015

The molecular structure of cyclopropene has been determined by gas‐phase electron difraction. A least‐squares analysis was applied to the experimental molecular intensity to obtain the following geometric structural parameters: Cl‐C3=1.304±0.003A, C3‐C3=1.519±0.002A, C1‐H=1.077±0.012A, C3‐H=1.112±0.015A.
Chemical Constituents of Umbelliferous Plants. XIV. Coumarins from the Root of Angelica Tarokoensis Hayata
Authors: Yen Kun‐Ying , Yang Ling‐Ling
Published: June 2015

Xanthotoxin and byak‐angelicin were isolated from the root of Angelica tarokoensis Hayata. Imperatorin, bergapten and marmesin were also detected by thin layer chromatography.
Polyamide‐Silica Gel Mixed Layer Chromatography of Antipyretics
Authors: Chiang Hung‐Cheh , Liu Chu‐Chi
Published: June 2015

Nine antipyretics are well separated on a polyamide‐silica gel G (1:5.2) mixed layer with four solvent systems. The mixed layer is firmly bonded and easy to handle and store. The method is applicable for the identification of A. P. C. tablet and the detection of free salicylic acid in aspirin.
Infrared and Nuclear Magnetic Resonance Absorptions of Common Liquid Stationary Phases for Preparative Gas Chromatography
Authors: Liu Kwang‐Ting
Published: June 2015

It is well known that many liquid stationary phases for gas chromatography have a tendency to bleed at high temperature and/or at high flow rate. This problem is especially important in preprative applications, since the liquid phase may then be the contaminant of a pure component. Such contaminant can hardly be deteced by gas chromatography. However, for routine spectral analysis it may introduce certain extraneous peaks in both infrared and nuclear magnetic resonance spectra of the pure component. Consequently, it is desirable to have handy references to avoid misleading by those peaks.
Emulsion Polymerization of Vinyl Acetate at Low Temperatures
Authors: Shiau Rhong‐Chau , Yamaguchi Tadashi
Published: June 2015

Polymerization of vinyl acetate (VAc) was carried out with potassium persulfate (KS) and ammonium sulfite as redox initiator in the presence of acetonitrile for the purpose of preparation of polyvinyl alcohol (PVA) of desired degree of polymerization (DP). The PVA obtained by this method at 0°C showed higher DP and lower solubility in water. It was observed that acetonitrile was a useful chain transfer agent in this polymerization system. It was also observed that ZnCl2 accelerated the polymerization of VAc and the over‐all activation energy of polymerization was 9.73 Kcal/mol. However, the stereoregularity of PVA obtained by the saponification of PVAc in this system was not improved by the presence of ZnCl2.
A Simple and Rapid Separation of Preservatives and Artificial Sweeteners by Polyamide Layer Chromatography
Authors: Wang R.T. , Chou S.S.
Published: June 2015

A simple and rapid polyamide chromatographic method for the detection of 12 kinds of preservatives and 3 kinds of artificial sweeteners were reported. The results indicated that the method was good in sensitivity, separability and reproducibility.
Studies on the Constituents of Anona Squamosa L.
Authors: Yang Tsang‐Hsiung , Chen Chi‐Ming
Published: June 2015

Anona squamosa L. (Fam. Anonaceae) has been used in folk medicine1 as amebicide, tonic, astringent and has antitumor activity against Ehrlich cancer cell in mice2,3. In order to search for the active constituents of Formosan antitumor plants, examination was made on the alkaloids of the roots of Anona squamosa L.

Seven alkaloids (A‐G) and an non‐alkaloidal compound (H) were isolated from the basic and n‐hexane fraction respectively. Identification of these bases by spectral analysis and direct comparison of their infrared spectra, tlc and mixed melting point have proved to be non‐phenolic anonaine (I), michelalbine (III), oxoushinsunine (liriodenine) (IV) and phenolic L‐(+)‐reticuline (V), anolobine (VI). Examination of other two minor phenolic Base‐D, mp. 224–226°, Base‐E, mp. 231–233° (decomp) and an non‐alkaloidal crystal‐H, mp. 175–176° are now in progress.
Synthesis of Biflavonyl Ethers
Authors: Chen F. C. , Ueng T. , Chen C. Y. , Chang P. W.
Published: June 2015

Three new biflavonyl ethers with 4′‐4″′ ether linkage (5∼7) and two haloflavonoids, 3′‐nitro‐4′‐bromoflavone(3) and the corresponding chalcone (2), have been synthesized.
Studies of Dipole‐Dipole Interactions of Acetone Molecules in Some Organic Solvents
Authors: Chang Chen‐Pin , Lin Tzu‐Fang
Published: June 2015

A new technique which permits rapid and precise measurement of vapor pressure over dilute solutions was used here to investigate the intermolecular forces of acetone molecules in several inert organic solvents. In the dilute solution of acetone mole fraction less than 0.03, acetone dimers were found to be the main species in the solvents, cyclohexane and CCl4. And no associated species of acetone were found in benzene. The strength of dipole‐dipole interactions which stabilize the acetone dimer were found comparable to that of some hydrogen bonds and also greatly influenced by solvents.
A Few Phenylcholesteroxysilanes
Authors: Liu Sheng‐Lieh , Yang Mei‐Hui
Published: June 2015

For comparison with methylcholesteroxysilanes, cholesteroxysilanes having phenyl group attached directly to silicon atom have been synthesized, their structure proved, and their properties examined.
Electronic Structure and Isomerization of Stilbene
Authors: Ting Chen‐Hanson , McClure Donald S.
Published: June 2015

The electronic structures of trans‐ and cis‐stilbene are calculated using Pariser and Parr's semiempirical method. The resonance integrals are adjusted so as to give the best agreement with the spectroscopic data. In addition, the potential surfaces of various excited states in stilbene during its isomerization process are calculated. Our results differ significently from those of Borrell and Greenwood2) who did not realized the importance of a doubly excited singlet state to the potential surface of the ground state of stilbene. Our improved potential surfaces suggests mechanism of various radiationless leading to photoisomerization and sensitized isomerization.
A Synthesis of Dihydrojasmone
Authors: Ho Tse‐Lok
Published: June 2015

A two‐step synthesis of dihydrojasmone from 2‐n‐pentyl cyclopentan‐1,3‐dione is reported.
HMO and SCF Calculations on Acetylacetonate Anion, Phenyl Azide and Some Tetracyclic Hydrocarbons
Authors: Chang Chin‐An , Liang Bih‐Fong
Published: June 2015

Molecular orbital calculations using the Hückel method, the ω‐technique and the Pariser‐Parr‐Pople SCF method are compared with one another. The effect of including the overlap integral is compared to that excluding it. The calculated quantities agree well with the available experimental values.
Mössbauer Study of Some Gamma‐ and Neutron‐Irradiated Iron Carbonyl Complexes
Authors: Cheng H.S. , Yeh S.J. , Cheng P.K.
Published: June 2015

Mössbauer effect experiments have been carried out on 60Co and reactor irradiated CFe(CO)3SCH1]2, [(C4H9)2SnFe(CO)4]3, (C6H5)1PFe(CO)4, (CH2)4[Fe(CO)2C3H5]2, and (CH2)4.(CO)2[Fe(CO)2C5H5]2. It was found that the Fe—CO bond is rather radiation resistant than are expected due to the π bonding character. The σ bonds such as C—H are labile to radiation. The presence of acyl carbonyl group increase the radiation resistant property of the molecule. The increase in the isomer shift values of the complexes with cyclopentadienyl groups were interpreted as a result of dehydrogenation.
Spectrophotometric Studies of Cobalt (II) Chelate of P‐(2‐Hydroxy‐1‐Naphthylazo) Benzenesulphonate
Authors: Hseu Tong‐Ming , Ko Su‐Ya
Published: June 2015

Cobalt(II) chelate of p‐(2‐hydroxy‐1‐naphthylazo)benzenesulphonate (orange II) has been studied spectrophotometrically in aqueous solution at 25° and at an ionic strength of 0.10 M. The formation of this chelate is pH dependent, the optimum pH range is between 9.5 to 10.8. Its mole ratio of ligand to cobalt(II) is 3 to 1 stoichiometry and the formation constant, logK, is determined as 19.17±0.13. By using the wave‐length of 357 mμ, determination of trace amount of cobalt(II) with the sensitivity of 0.077 y/cm2 is possible.
Structural Studies on Bitter Principle from Brucea Sumatrana
Authors: Chem Shi‐Chow
Published: June 2015

The main bitter principle isolated from the chloroform extract of the seeds of Brucea sumatrana was shown to be C24H32O11, which, upon treatment of sodium methoxide, gave bruceolide and senecioic acid. Partial structural elucidation of bruceolide was described.
A Thermochemical Study on the Formation of Oxalato‐Titanium(III) Complex
Authors: Pan Kuan , Hsin Shu‐Ching , Huang Teh‐Shoon
Published: June 2015

The thermometric titration of titanium(III) chloride with oxalic acid was carried out at 25°C. The molar ratio of titanium (III): oxalate was found to be 1:2, which indicates the formation of Ti(C2O4)2− ion in acid media. The limiting value of the heat of reaction between Ti(III) ion and oxalic acid in hydrochloric acid solution was found to be −1.5 Kcal mole−1 at 25°C.
Polarized Raman Spectra X. Polarized Raman Spectra of Naphthalene Single Crystal
Authors: Lin Tien‐Pin , Ting Chen‐Hanson
Published: June 2015

The polarized Raman spectra of naphthalene single crystal are recorded with a laser Raman spectrometer. Relative intensites of Raman lines in various polarizations are accurately measured by photon‐counting technique. All the strong lines are polarized in the c′c′ and bb polarizations, and the polarization data alone are not sufficient to decide the symmetry of a Raman active vibration. The oriented gas model is found not adequate to fully understand the results. The polarization data have to be interpreted in terms of the electronic spectrum of naphthalene.
Approximate Self‐Consistent Molecular Orbital Method and Repulsive Bonding of Monocarbocyclic Π System
Authors: Chen Cheng
Published: June 2015

Zero differential overlap (ZDO) approximation1,2) and the consideration of long range (meta and para bonds etc) bonding are applied in this semiempirical LCAO‐SCF MO method. Effective Huckel type formulation and diagonalization procedure of symmetry adapted analysis simplify the computational procedure as well as give a clear and intuitive localized bonding behavior of the carbocyclic molecules. The long range repulsive bonds are defined and discussed between aromatic and non‐aromatic cases. Such bonds are closely correlated to the rigidity and distortion of ring systems. Benzene is the most stable species among the 6π electron systems, and there will be some new explanation of Dewar resonance structures due to the consideration of long range para repulsive bonds in this work.
Green's Function Determination of Force Constants‐H2O as Example
Authors: Mou Chung Yuan , Chen Tunli
Published: June 2015

Treating isotopically substituted molecule as a perturbed system, Green's function for the perturbation are constructed and related to the force field of vibration. By spectral representation, Green's function is diagonalized in the normal coordinates. Then transforming back to the Cartesian coordinates, the Cartesian force constants are generated without solving the secular equation directly. The relations between the internal force constants and the Cartesian force constants ate given and complete internal force field can be obtained. The results for H2O are discussed.
Raman Spectra of Carbohydrates
Authors: Wang I‐Cheng , Ting Chen‐Hanson
Published: June 2015

The Raman spectra of 13 different carbohydrates are investigated by a laser Raman spectrometer. It is found the C—H stretching vibrations around 3000 cm−1 is the best region for qualitative analysis of these compounds. All compounds show an O—H stretching vibration around 3370 cm−1 which was not mentioned by earlier works. Excessive background noise appears in many spectra, probably due to their amorphous stuctures.
Anion Exchange Separation of Rare Earths in Methanol‐Nitric Acid Mixed Solutions I. Study on the Distribution Coefficients and Column Elution Method
Authors: Chen Ying‐Mao , Liao Sun‐Chang
Published: June 2015

Anion exchange method for the mutual separation of rare earth was studied in methanol‐nitric acid mixed solutions. For each of rare earth element, the distribution coefficients in different concentrations of nitric acid and also in various compositions of methanol solution were studied with the batch equilibrium method. From these distribution coefficients, elution of rare earth by gradient variation in the compositions of methonal was devised. That is, by keeping constant nitric acid at 2 N acidity and gradiently diluting methanol from its original 80% by volume. Results were satisfactory for the mutual separation of the lighter rare earths, but only fairly for the heavier earths.

The secondary metal effect for this anion exchange was also studied in 80% by volume of methanol solution by keeping total concentration of nitrate at 0.8 N. Distribution coefficients were larger than nitric acid with LiNO3 but smaller in the case of NH4NO3 and NaNO3. Despite of these difference in distribution coefficients, no remarkable differences were observed for the separation factors of adjacent pairs.
The Photochemistry of Diazomethane the Reactions of Methylene with Toluene and P‐Xylene in Liquid Phase (I)
Authors: Ho Shih Yeng , Wu J. F.
Published: June 2015

The photochemistry of diazomethane in toluene and p‐xylene solutions was investigated. The reactions of methylene with toluene gave eight products. In the diazomethane p‐xylene solution, p‐ethyltoluene, 1,2,4‐trimethylbenzene, 1,4‐dimethylcyclohepatriene‐1,3,5 and three unidentified compounds were found as products of the reaction of methylene with p‐xylene. The relative rates of addition and insertion reaction of methylene with toluene and p‐xylene have been calculated.
A Kinetic Study on the Reduction of Cyanocobalamin with Titanium(III) Chloride
Authors: Pan Kuan , Hsu Ming‐Ta
Published: June 2015

The reaction rate for the reduction of cyanocobalamin (B12) with Ti(III) in HCl and KCl solutions at constant ionic strength was followed by spectrophotometric measurements at 15°, 20°, 25° and 30°C. The reaction rats was found to be of pseudo‐first‐order with respect to B12 and of second‐order with respect to B12 and Ti(III) in HCl solutions. The second‐order rate constant was given by for the processes, The values of K0 obtained were 0.80∼1.29 liter mole−1 sec−1 in the range of ionic strength 0.2∼0.5 M at 30°. The average activation energy was 20.5 kcal mole−1.
Electrometric Behavior of Tetraphenylboron on Mercury
Authors: Lin Zui‐Feng , Li Ting‐I
Published: June 2015

Electrometric behavior of tetraphenylboron (TPB) on mercury electrode was investigated, Potentiometric titration of Hg2++ with TPB− showed that TPB− reacted with Hg2++ with stoichiometric ratios (equivalent) of 1:3 and 1:8 (TPB: Hg2++) to form diphenylmercury, Hg(C6H5)2, and phenylmercuric ion, C6H5—Hg+. Only 1:3 stoichiometry was found in the reverse titration. Potential response of TPB− on mercury assumed the same result, and furthermore, if the concentration of TPB− was around 10−3 M or higher, another stoichiometry of 1:1 with formation of Hg(I)‐tetraphenylborate might be possible. Controlled potential oxidation of TPB− on mercury gave Hg(C6H5)2 and C6H5Hg+ which were identified by m. p. measurements and elementary analyses.
The Photochemistry of Diazomethane the Reaction of Methylene with Ammonia and Methylamine
Authors: Ho Shih‐Yeng , Tong Shen‐Nan
Published: June 2015

In the photolysis of diazomethane in the presence of ammonia, the ratio of the products, [CH3NH2/[C2H4], has been studied as a function of pressure, temperature and composition of diazomethane‐ammonia mixture, respectively. This ratio increases with increase in total pressure at low pressures and approaches a constant at high pressures.

In the diazomethane‐methylamine system, the ratio of products, [CH3CH2NH2]/[(CH3)2NH], is independent of the pressure in the range from 23 to 500 torr. The rates of insertion of singlet methylene into C–H bond and N–H bond of CH3NH2 are found to be about the same.
Studies on the Preparation and Properties of Some Phenolic Derivatives of Tricyclopentadienyl Cerium (IV) and Bisindenyl Cerium (IV)
Authors: Kapur (Miss) Shushma , Kalsotra B. L. , Multani R. K.
Published: June 2015

Reactions of tricyclopentadienyl cerium (IV) chloride (I) and bisindenyl cerium (TV) dichloride (II) with mono‐, di‐, and trihydroxy phenols have been studied and some phenoxide derivatives of (I) and (II) have been isolated. Infrared spectra and some physical characteristics of all these compounds are Reported.
Para‐Conjugation in Aromatic Systems and the Correlation between Mo Bond Order and the Resonance Structures Cheng
Authors: Chen Chen
Published: June 2015

A simple correlation between the MO bond orders and the resonance structures of a π system is proposed. Para conjugation is a resonance structure with parallel arrangement of alternating attractive and repulsive bonds. The results in C5H5−, C6H6 and C77+ clearly show that the para conjugation is very important comparing with the ordinary ring conjugation. The aromatic substitution reactions strongly demomstrates the effect of para conjugation in benzene, naphthalene and anthrance.
The Photochemistry of Diazomethane the Reactions of Methylene with Methanol and Ethanol
Authors: Ho Shih‐Yeng , Lin Horn‐Bond
Published: June 2015

In the photolysis of diazomethane‐methanol. mixture, the reaction of methylene with methanol gives dimethyl ether and ethanol as products. The ratio of dimethyl ether to ethanol is found to be independent to pressure and to. the composition of diazomethane‐methanol mixture. Methylene insertion into O—H bond is about 11 times faster than that into C—H bonds of methanol. The ratio decreases with increase of temperature.

In the diazomethane‐ethanol system, ethylmethyl ether, propanol‐1 and propanol‐2 are found as the products of insertion reaction of methylene into ethanol. The ratios of ethylmethyl ether to propanol‐1 and to propanol‐2 are both found to be almost constant and independent to pressure and to the composition of diazomethane‐ethanol mixture. A small temperature effect on the ratios are observed. The rate of insertion of methylene into O—H bond is about 7.3 and 14.2 times faster than those into primary and secondary C—H bonds of ethanol, respectively.
Photoaddition of Iodoform to P‐Chlorostyrene and Indene
Authors: Lin Lung‐Ching , Hsu Ying‐Gev , Wamg Ching‐Bore
Published: June 2015

A new type of triiodo compounds synthesized by irradiation of p‐chlorostyrene or indene with iodoform in the inert solvent is reported.
Two New Saturated Sesquiterpene Diols—Cadinan‐3β, 9β‐Diol and Cadinan‐3β, 9α‐Diol from Taiwania Cryptomerioides Hayata
Authors: Kuo Y. H. , Cheng Y. S. , Kao S. T. , Lin Y. T.
Published: June 2015

From the wood of Taiwania cryptomerioides Hayata, two new sesquiterpenes, cadinan‐3β, 9β‐diol and cadinan‐3β, 9α‐diol were isolated as minor components. Their structures were elucidated as (I) and (II), respectively.
Normal Coordinate Analysis in Cartesian Space I. Planar Symmetric Xn Molecules
Authors: Ting Chen‐Hanson
Published: June 2015

Normal coordinate analysis of Xn type molecules can be carried out in the Cartesian space as well as in the internal space. Force constants in Cartesian coordinates for aromatic compounds belonging to Dnh group are calculated. The force constants of benzene are evaluated from vibrational frequencies both in the ground state and the 1B1u excited state.

The calculated frequencies of planar carbon vibration of annulene of any N are tabulated. The normal coordinates derived from the calculation of 10‐annulene are roughly the same of naphthalene derived more elaborated by Scherer. The normal modes in 10‐annulene are indeed good approximations to the ones in naphthalene. This conclusion is valid for the other aromatic compounds.
The Mass Spectrometry of Some Bis (Trimethylsiloxy)Naphthalenes
Authors: Wang Ching‐Bore , Lin Lung‐Ching , Liu Sheng‐Lith
Published: June 2015

Mass spectrometric data were reported for 1,4‐; 1,5‐; 1,6‐; 1,7‐ and 2,6‐bis(trimethylsiloxy)naphthalenes. By the use of metastable‐ion measurement the major fragmentation pathways of the five compounds have been deduced. The doubly charged ion and ion‐molecule‐reaction ion were also discussed.
Studies on the Constituents of Hemerocallis Disticha Donn
Authors: Lin Chun‐Nan , Chang Cheng‐Hsiung , Wu Tian‐Shung
Published: June 2015

Dimethylterephthalate (I) was isolated from the flower buds of Hemerocallis disticha Donn. (Liliaceae).
Correlation of Mössbauer and Radiochemical Data on Hexacyanoferrates(II)
Authors: Lee Y. J. , Chen J. W. , Huang C. H. , Yeh S. J. , Cheng H. S.
Published: June 2015

Mössbauer spectra of K4Fe(CN)6 and K4Fe(CN)6 3H2O, observed 3 weeks after irradiation, did not differ from the unirradiated samples, which implied that there was no change in oxidation state of iron. The fresh aqueous solutions of these irradiated samples also did not show any change in the oxidation state. Fe(OH)3 separated in chemical treatment was time dependent and was further influenced by the chemical reagents.
Correlation of Mössbauer and Radiochemical Data on Hexacyanoferrate(III)
Authors: Lee Y. J. , Chen J. W. , Huang C. H. , Yeii S. J. , Cheng H. S.
Published: June 2015

Mössbauer spectra of irradiated K1Fe(CN)6, observed 3 weeks after irradiation, showed that 3% of iron was converted to Fe(CN)64−, while chemical analysis performed 100 hours after irradiation showed 18% was reduced to Fe(CN)64−, Prussian blue was isolated in the chemical analysis, but not observed in the Mössbauer spectra. The Prussian blue formation was found to be time dependent.
Thermometric Studies of Multi‐Valent Metal Complexes
Authors: Hsin Shu‐Ching , Huang Teh‐Shoon
Published: June 2015

Thermometric titrations of lanthanum perchlorate, titanium (III)‐chloride, uranium (IV)‐sulfate, and uranyl sulfate with EDTA solutions were carried out by using a Keithley nanovoltmeter with a rhodium‐platinum thermocouple at 25°±0.01°. The formation of LaY−, TiY−, U(IV)Y and UO2HY− ions was confirmed. The heat of reaction for the system, Ti(III)+H2Y2− = TiY−+2H+, was given by δH1 = 1.933‐1.422×10 m +2.056×104m (in cal) and the limiting value was evaluated to be δH°1 = 1.9 kcal mol−1 at 25°C.
NMR Study of Some Sesquiterpene Alcohols and Their Oxidation Products
Authors: Lin Y. T. , Cheng Y. S. , Kuo Y. H. , Lin K. C.
Published: June 2015

Oxidations of α‐cadinol, T‐cadinol, T‐muurolol and δ‐cadinol with SeO3 gave corresponding ketols and diols. Reductions of the ketols with NaBH4 gave epidiols. NMR data of these sixteen compounds are compared.
3‐Nitroso‐4‐Hydroxy‐5,6‐Benzocoumarin as a Specific Reagent for the Detection of Iron in Microamounts
Authors: Kohli Nitin , Garg B. S. , Singh R. P.
Published: June 2015

Complexation of 3‐nitroso‐4‐hydroxy‐5, 6‐benzocoumarin with iron (II) is used to detect iron in presence of various ions present in the scheme of semi‐micro qualitative analysis. The method finds application in detection of iron in alloys, inorganic salts and various pharmaceutical products.
A Thermodynamic Study of Chromotropico‐Titanium(III) Complex from Spectrophotometric Measurements
Authors: Pan Kuan , Liang Yu‐Lon
Published: June 2015

The formation of 1 : 2 titanium(III) complex with chromotropic acid (4, 5‐dihydroxy‐2, 7‐naphthalene‐disulfonic acid) was observed by spectrophotometric measurements at various ionic strengths. An expression, [Ti(III)]/D=1/Δϵ + αH2+/KΔϵ[H2R2−]2, was derived for the determination of the formation constant, K=7.2×102 liter2 mol−2 for the Ti(III).(HR)2 ion in the pH range of 1.3–1.8 at constant ionic strength, I=0.2 M, at 25°C. The thermodynamic data for the reaction, Ti(III)+2H3R2−=Ti(III) (HR)2+2H+, were calculated to be ΔG° = −16 kJ mol−1 ΔH° = 18 kJ mol−1, ΔS° = 110 JK−1 mol−1, at 25°C.
Mössbauer Studies of Radiation Effect on Pentacyano Complexes of Iron
Authors: Huang C. H. , Cheng H. S.
Published: June 2015

Mössbauer and ir spectroscopies have been applied to the study of radiation effect on Fe11X(CN)3 (X=NO+, NH3, H2O, NO2−, SO3=) and Fe111X(CN)3 (X=NH1, H2O, NO2−). Fe(II) complexes were not oxidized to Fe(III), whereas Fe(III) complexes were reduced to Fe(II). Na2[FeNH3(CN)3]·H2O was partially reduced at 7 hour irradiation, but [FeNO(CN)2]= was obtained at the longer irradiations due to the replacement of H by O produced by water radiolysis.
Essential Oils XVI Oil of Eryngium Foetidum, Linn.
Authors: Yeh Ping‐Hsien
Published: June 2015

The oil of Eryngium foetidum, Linn. consists 9.06% of acid part and 90.94% of neutral part. The constituents are 4.80% lauric acid, 2.09% 3, 4‐dimethylbenzoic acid, 1.17% capric acid, 1.00% of an unidentified acid (p‐bromophenacyl ester m. p. 68°), 2.59% α‐pinene, 2.26% p‐cymene, 1.88% decanal, 72.73% of a mixture of 2, 4, 5‐trimethylbenzaldehyde, 5‐dodecanone and 4‐hydroxy‐3, 5‐dimethylacetophenone, 10.16% sesquiterpene ketone, and 1.32% others.
Air Oxidation of α‐Terpineol
Authors: Tsai M. D. , Cheng Y. S.
Published: June 2015

Oxidation of α‐terpineol by atmospheric air resulted twelve products, which seemed more complicated than the results of the previous works. All the products were identified and rationalized. The mechanisms of some minor reactions were discussed.
Electron Spin Resonance of Trapped Radicals and the Photoinduced Radical Conversion in γ‐Irradiated 3‐Methylpentane Glasses at 77°K
Authors: Lin D. P.
Published: June 2015

Studies on the isotropic hyperfine splitting constants of protiated and deuterated 3‐methylpentyl radicals produced by γ‐ray accompanied with the radical yield determinations reveal that the radicals are distributed in clusters in the matrix. A tentative mechanism with the migration of positive hole is proposed for the formation of UV‐induced new radicals following γ‐irradiation in 3‐methylpentane glasses at 77°K; and to account for all the experimental observation.
The Reaction of Ethyl Bromoacetate with Dimethyl Sulfoxide
Authors: Tien J. M.
Published: June 2015

The reaction of excess dimethyl sulfoxide with ethyl bromoacetate has been shown to produce ethyl glyoxylate, hydrogen bromide, and dimethyl sulfide. The yield of glyoxylate at first was reduced because the dimethyl sulfide reacted with bromoacetate to form trimethylsulfonium bromide and ethyl (methylmercapto) acetate, presumably via carbethoxymethyldimethylsulfonium bromide. These side reactions were diminished in a thin‐film reactor, but the result was not satisfiable, the yield was 51%, and the side reactions were prevented by addition of methyl bromide, which rapidly consumed the dimethyl sulfide with formation of trimethylsulfonium bromide. Addition of 1, 2‐epoxy‐3‐phenoxypropane removed the hydrogen bromide, thereby preventing the deleterious effects casued by its reduction of dimethyl sulfoxide to dimethyl sulfide. In this way has been developed a convenient preparation of ethyl glyoxylate in yields averaging about 70%. Identification and stoichiometry of the reaction products are presented.