bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and Properties of N,N′- and Co,N′-Vinylene Linked Bisporphyrins
Authors: Setsune Jun-ichiro , Ishimaru Yoshihiro , Saito Yasushi , Kitao Teijiro 
Published: May 2006

Abstract
Bis(aquo)tetra(p-tolyl)porphinatocobalt(III) perchlorate reacted immediately with acetylene, in the absence and presence of tetra(p-tolyl)porphinatocobalt (II), to give a N,N′-vinylene linked bisporphyrin biscobalt(II) complex and a Co,N′-vinylene linked bisporphyrin cobalt(III) complex (4b), respectively. (4b) was oxidatively converted into N,N′-vinylene linked bisporphyrin free base. An octaethylporphyrin analogue corresponding to 4b was obtained when a mixture of bis(aquo)octaethylporphyrinatocobalt(III) perchlorate and octaethylporphyrin was allowed to react with acetylene gas.
Novel Spiro-Compound, Hyperolactone from Hypericum chinense L.
Authors: Tada Masahiro , Nagai Masashi , Okumura Chieko , Osano Yasuko , Matsuzaki Takao 
Published: May 2006

Abstract
A novel metabolite spiro-compound, hyperolactone was isolated from stems and leaves of Hypericum chinense L. The structure was deduced by 2D-NMR experiment, chemical transformation and finaly by X-ray crystallography.
Differences between Properties of (Na,Ca)-A Zeolites Treated in Deep-bed and Shallow-bed
Authors: Ohgushi Tatsuo , Miyoshi Manabu 
Published: May 2006

Abstract
Properties of (Na,Ca)-A zeolites treated in a deep-bed and shallow-bed were compared with each other. Adsorptive capacities for water linearly increased with increasing of a Ca content in the deep-bed zeolites but not in the shallow-bed zeolites. Thermal stabilities of the zeolites were lowered by the deep-bed treatment but not by the shallow-bed one. Differences in the properties of both zeolites were related to rearrangement of Ca2+ ions.
Smectic Properties of 4-(4-Alkoxyphenoxycarbonyl)phenyl 4-Formylbenzoates
Authors: Sakurai Yoshiaki , Takeda Hitoshi , Takenaka Shunsuke , Kusabayashi Shigekazu , Doi Takashi , Miyake Hajime 
Published: May 2006

Abstract
The octyloxy homolog and the higher members of 4-(4-alkoxyphenoxycarbonyl)phenyl 4-formylbenzoates show two kinds of smectic A phases and experience a smectic A-smectic A transition, where the lower smectic A phase has a bilayer arrangement of the molecules, and the upper probably a monolayer one.
A Novel Ethynylation of Pyridines by Reissert–Henze Type Reaction
Authors: Nishiwaki Nagatoshi , Minakata Satoshi , Komatsu Mitsuo , Ohshiro Yoshiki 
Published: May 2006

Abstract
Reaction of N-benzoyloxypyridinium chloride, Reissert–Henze salt, with silver acetylide gave the pyridine ethynylated selectively at 2-position. The reaction is applicable to various substituted pyridines and pyridine homologs.
Regioselective Methylation of the C-1 and C-3 Positions of 1,5-Anhydro-4,6-O-benzylidene-2-deoxy-3-O-mesyl-D-ribo-hex-1-enitol by the Reaction with Methylmagnesium Bromide or Methyl Cuprates
Authors: Mitsunobu Oyo , Yoshida Makiko , Takiya Masashi , Kubo Keiji , Maruyama Seitaro , Satoh Izumi , Iwami Hideaki 
Published: May 2006

Abstract
1,5-Anhydro-4,6-O-benzylidene-2-deoxy-3-O-mesyl-D-ribo-hex-1-enitol reacted with alkylmagnesium bromides (RMgBr: R = C2H5–, (CH3)2CH–, or C2H5(CH3)CH–) to give the corresponding 1-β-C-glycopyranosides and 3-C-alkyl-D-arabino-hex-1-enitols, while the reaction with methylmagnesium bromide afforded 1-α-C- and 1-β-C-methyl-glycosides in a ratio of 1 : 1.5–2. On the other hand, when the reaction was carried out in the presence of Cul or CuBr–S(CH3)2, substitution took place at the C-3 position to afford the corresponding 3-C-methyl-D-arabino-hex-1-enitol.
Preparation and Characterization of Aluminum-doped SiO2:Sm3+ Phosphor
Authors: Okumura Hiroaki , Kakuta Noriyoshi , Ueno Akifumi , Morimo Ryuichi , Mizushima Takanori , Udagawa Yasuo , Namikawa Hiroshi 
Published: May 2006

Abstract
Samarium ions in Al-doped SiO2:Sm3+ phosphor were revealed to be atomically dispersed in small Al2O3 crystallites by forming Sm–O–Al bonding, which contributes to improvements in the fluorescent intensity of SiO2:Sm3+ phosphor.
Highly Selective Formation of 1-Phenylethanol by Indirect Electroreduction of Acetophenone on a Lead Cathode in the Presence of Catalytic Amounts of Antimony(III) Chloride
Authors: Ikeda Yoshikazu , Manda Eiichiro 
Published: May 2006

Abstract
In the presence of antimony(III) chloride, acetophenone is selectively electroreduced to 1-phenylethanol on a lead cathode in protic medium at low current densities.
Carbon-Skeleton Rearrangement of an Alkyl Ligand Coordinated to Simple Vitamin B12 Model Complexes in Synthetic Bilayer Membrane
Authors: Murakami Yukito , Hisaeda Yoshio , Song Xi-Ming , Fan Sheng-Di 
Published: May 2006

Abstract
The carbon-skeleton rearrangement of an alkyl ligand coordinated to the nuclear cobalt of simple vitamin B12 model complexes formed with diimine–dioxime-type ligands took place efficiently in a synthetic bilayer membrane under irradiation with visible light.
An Alternative New Route to Perfluorovinylamines. Pyrolysis of an Alkali Metal Salt of Perfluoro(3-dialkylamino-propionic acids)
Authors: Abe Takashi , Hayashi Eiji , Shimizu Tetsuo 
Published: May 2006

Abstract
An alternative new route to give various kinds of perfluorovinylamines is described, which involves a pyrolysis of an alkali metal salt of perfluoro(3-dialkylamino-propionic acids) instead of using that of perfluoro(2-dialkylamino-propionic acids).
Hindered Internal Rotation of N,N-Dimethylamino Group in Peri-substituted Naphthalenes
Authors: Nagawa Yoshinobu , Honda Koichi , Nakanishi Hiroshi 
Published: May 2006

Abstract
The rotation around the C–N bond between the dimethylamino group and the naphthalene ring in 1-(8-dimethylamino-1-naphthy1)-1H-1,2,3-triazoles is strongly restricted and the rotational barrier is enhanced by the substituent at 5-position of the triazole ring.
10,15-Methanothia[23]annulene. Geometrical Isomerism and Flipping of the Methylene Bridge
Authors: Yamamoto Gaku , Ojima Juro , Miyashita Hiroki , Kuroda Shigeyasu , Kano Yoshinari 
Published: May 2006

Abstract
Synthesis of the title compound is described. The compound is composed of two geometrical isomers in which the positions of cis double bonds are different. Flipping of the methylene bridge is detected by dynamic NMR spectroscopy in both isomers.
Synthesis, X-Ray Analysis, EXAFS, and XANES of [Ni(SCH2CH2S)2]2−. An Evidence for the Mononuclear Square Planar {Ni(II)S−4} Geometry in Nickel/Alkane Thiolate System
Authors: Yamamura Takeshi , Kurihara Hiroaki , Nakamura Nobuhumi , Kuroda Reiko , Asakura Kiyotaka 
Published: May 2006

Abstract
Crystalline (Ph3MeP)2[Ni(edt)2] was isolated and studied by X-ray analysis and X-ray absorption (EXAFS/XANES) methods, which revealed a square planar {NiS−4} geometry for the chromophore. The results were discussed in terms of the nickel site of hydrogenases.
A Chiral Route to Both Enantiomers of Physostigmine and the First Synthesis of (−)-Norphysostigmine
Authors: Takano Seiichi , Moriya Minoru , Iwabuchi Yoshiharu , Ogasawara Kunio 
Published: May 2006

Abstract
A chiral route to both enantiomers of esermethol, the key synthetic precursor of physostigmine, has been established starting from (S)-O-benzylglycidol via separation of the diastereomeric intermediates. (−)-Physostigmine obtainable from the (−)-enantiomer has been first transformed into (−)-norphysostigmine, the only unsynthesized member of the alkaloid group ever determined.
Brassicanals A and B, Novel Sulfur-Containing Phytoalexins from the Chinese Cabbage Brassica campestris L. ssp. pekinensis
Authors: Monde Kenji , Katsui Nobukatsu , Shirata Akira , Takasugi Mitsuo 
Published: May 2006

Abstract
The isolation and structure elucidation of two sulfur-containing indole phytoalexins, brassicanals A and B, are described. Unusual 1H NMR spectra of brassicanal B are also discussed.
A Novel Photographic Assay of 1-Phenyl-5-mercaptotetrazole Having a Formylhydrazino Moiety by Using Its Electron Injecting Activity toward Silver Bromide Grains
Authors: Ono Mitsunori , Masuda Nobuhito , Matsushita Tetsunori , Itoh Isamu , Kitajima Masao 
Published: May 2006

Abstract
A novel photographic assay of 1-(3-[4-(2-formylhydrazino)phenylaminosulfonyl]phenyl)-5-mercaptotetrazole is described. The present result provides the first example exhibiting a quantitative correlation between the logarithm of concentration of an organic reductant used instead of exposure to light and the optical density of the film after development. An applicability of this system for the determination of traces of enzyme is also suggested throughout several model experiments.
A Novel Highly Selective Reduction of Tertiary Amides to Amines with Sodium Borohydride-Bis(2-bromoethyl)selenium Dibromide
Authors: Akabori Sadatoshi , Takanohashi Yoshinori 
Published: May 2006

Abstract
Treatment of tertiary amides with sodium borohydride-bis(2-bromoethyl)selenium dibromide in THF gave the corresponding amines, although the similar reactions of secondary and primary amides could not proceeded.
One-pot Synthesis of Strapped Porphyrins and Face-to-face Dimeric Porphyrins
Authors: Osuka Atsuhiro , Kobayashi Fumikazu , Nagata Toshi , Maruyama Kazuhiro 
Published: May 2006

Abstract
Strapped porphyrins were prepared directly by the acid-catalyzed condensation of 3,3′-diethyl-4,4′-dimethyl-2,2′-dipyrrylmethane with methylenedioxy bridged dialdehydes with bridging carbon atoms longer than 5. With dialdehydes having shorter chains, face-to-face dimeric porphyrins were obtained. In short chain strapped porphyrins, distortion of porphyrin ring is confirmed by their 1H-NMR data, red shifted absorption, and fluorescence spectra.
Synthesis of a New Family of Chiral Smectic Liquid Crystals Bearing a Pyridine Heterocycles
Authors: Seto Koji , Shimojitosyo Hiroshi , Imazaki Hideyuki , Matsubara Hiroshi , Takahashi Shigetoshi 
Published: May 2006

Abstract
A new family of chiral smectic liquid crystalline compounds having a core structure of have been synthesized by a palladium-catalyzed coupling reaction of halopyridines with ethynyl compounds. The method is available for construction of liquid crystals having a core structure of .
Regiospecific Synthesis of 1-Substituted 1,2,4-Triazoles Involving Isomerization of the Corresponding 4-Substituted Compounds
Authors: Smith Keith , Small Andrew , Hutchings Michael G 
Published: May 2006

Abstract
On heating with a catalytic quantity of the corresponding alkyl or phenacyl halides, 4-alkyl- or 4-phenacyl-1,2,4-triazoles isomerize via quaternary salts to their 1-substituted isomers. Thus, the 1-substituted compounds can now be obtained regiospecifically from 1,2,4-triazole by alkylation-isomerization.
Chemical Effects of Thermal Neutron Irradiation on α-LiFeO2
Authors: Aratono Yasuyuki , Sagawa Chiaki , Nakashima Mikio , Saeki Masakatsu , Sato Takuma 
Published: May 2006

Abstract
Chemical effects caused by the 6Li(n,α)3H nuclear reaction in α-LiFeO2 were studied with Mössbauer spectroscopy. Magnetite was observed on the irradiation. The amount of magnetite increased with irradiation fluence until about 1022 m−2 was reached. It then became a constant value of about 50% of the α-LiFeO2 in the iron atom ratio. The G value for the formation of magnetite was initially 10−2 and decreased to about 10−3 at a fluence of 3 × 1022 m−2.
Thermal Isomerization Rate of a Long Chain Spiropyran in Bilayer Matrix. Dependence of Aggregate Dimension of Bilayer Formed by Dioctadecyldimethylammonium Bromide
Authors: Seki Takahiro , Ichimura Kunihiro 
Published: May 2006

Abstract
The thermal isomerization rate from UV-induced merocyanine to spiropyran is observed in an ammonium bilayer membrane of varied aggregate dimension. In smaller bilayer aggregates, the reaction rate is retarded due to increase of polarity around the chromophore possibly as the result of larger penetration of water molecules into the bilayer matrix having the greater membrane curvature.
NMR Relaxation Time Studies of Ionophoric Calixarene Esters
Authors: Yamada Akihiro , Murase Tatsuya , Kikukawa Kiyoshi , Matsuda Tsutomu , Shinkai Seiji 
Published: May 2006

Abstract
Relaxation times of ethoxycarbonylmethyl derivatives of p-t-butylcalix[n]arenes (n = 4, 6, and 8) were estimated for the first time with 1H NMR. It was shown that the benzene units feature a “seesaw” motion around the ArCH2Ar circle and the motion is suppressed by Na+ serving as a template ion.
Reaction of Methanol Vapor with Silicon into Trimethoxysilane with High Selectivity
Authors: Suzuki Eiichi , Ono Yoshio 
Published: May 2006

Abstract
Trimethoxysilane was obtained with a 98% selectivity and at an 82% silicon conversion in 5 h of reaction time, when methanol (99 kPa) was fed at 543 K into a fixed-bed reactor containing silicon powder preheated with copper(I) chloride at 623 K for 3 h.
197Au Mössbauer Spectra of Binuclear Gold(I) and Gold(II) Complexes Containing Bridging Cyclometalated Arylphosphine or Arylarsine Ligands
Authors: Takeda Masuo , Takahashi Masashi , Ito Yasuo , Takano Takemi , Bennett Martin A , Bhargava Suresh K 
Published: May 2006

Abstract
The gold-197 Mössbauer parameters have been determined at 20 K for three binuclear gold(I) complexes [Au2(C6H4E)2] (E = PEt2, PPh2, AsPPh2) and for three complexes formed from them by halogenation, viz. [Au2(C6H4E)2X2] (E = PEt2, X = I; E = PPh2, X = I; E = PPh2, X = Br). The results show that the gold atoms in the latter compounds are equivalent and thus confirm the gold(II)–gold(II) formulation.
Photoinduced Resistance Change across Poly(vinyl chloride)/Spirobenzopyran Membrane
Authors: Sasaki Hiroshi , Kobayashi Setsuo , Itoh Yutaka , Osa Tetsuo 
Published: May 2006

Abstract
Membrane resistance across poly(vinyl chloride)entrapping spirobenzopyran was reversibly controlled by UV and visible light irradiation. After UV light irradiation, the magnitude of the membrane resistance became less than 1/1000.
Effects of Solvents and Media on the Efficiency and Course of Photoisomerization of Bilirubins
Authors: Kanna Yoko , Arai Tatsuo , Sakuragi Hirochika , Tokumaru Katsumi 
Published: May 2006

Abstract
The quantum yields of photoisomerization of bilirubin to various isomers were determined in various solvents. A specific photoisomerization took place only in buffered solutions containing human serum albumin. We discuss the effects of solvents and media surrounding bilirubin on its Photoisomerization.
Selective Adsorption of Dimethylarsinic Acid by Synthetic Inorganic Ion Exchangers
Authors: Tanaka Yasuo , Tsuji Masamichi , Abe Mitsuo 
Published: May 2006

Abstract
Six ion exchangers were studied for selective uptake of dimethylarsinic acid from aqueous media at around neutral pH. Hydrous oxides of multivalent metals showed very high selectivity towards dimethylarsinic acid in 0.01 mol dm−3 NaCl.
Influence of Metal Impurities in Silica Gel on Protein Analysis in Reversed-phase HPLC
Authors: Koyama Junichi , Nomura Junko , Ohtsu Yutaka , Nakata Okitsugu , Takahashi Motoji 
Published: May 2006

Abstract
In the case of protein analysis using reversed-phase high-performance liquid chromatography(RP-HPLC), it became evident that metal impurities in silica gel give great influence on peak shapes of protein. High metal impuritie resulted in poor column efficiency. The influence of metal impurities was found larger than that of residual silanols.
Synthesis of δ-Lactones via Stable Anionic Dimer of Methyl α-Alkyl Acrylates
Authors: Yamaguchi Kazumi , Kurasawa Yosihiro , Yokota Kazuaki 
Published: May 2006

Abstract
Polyfunctional δ-Lactones were prepared conveniently by successive addition of α-alkyl acrylates and aldehydes to the Grignard reagent. The intermediate of the reaction is anionic dimer of α-alkyl acrylate which can react with various electrophiles.
Inhibition of Deoxyribooligonucleotides on the Circle Opening Reaction of the Intervening Sequence from Tetrahymena thermophila
Authors: Sugimoto Naoki , Sasaki Muneo , Kierzek Ryszard , Turner Douglas H 
Published: May 2006

Abstract
The opening reaction of the circular form of the intervening sequence from Tetrahymena thermophila by the dinucleotide CU has been studied in the presence of some deoxyoligonucleotides. The results indicate that d(AGAG) does not inhibit the reaction, but d(CTCT) does. The oligomer, d(TGCA) also inhibits the reaction and the inhibition largely depends on the Mg2+ concentration.
Cobalt(II) Chloride Catalyzed Oxidation of 4-Substituted N,N-Dialkylanilines with Molecular Oxygen in the Presence of Acetic Anhydride
Authors: Murata Satoru , Tamatani Akira , Suzuki Kaoru , Miura Masahiro , Nomura Masakatsu 
Published: May 2006

Abstract
The oxidation of 4-substituted N,N-dialkylanilines with molecular oxygen using a catalytic amount of cobalt(II) chloride efficiently proceeds in the presence of acetic anhydride to give N-alkylacetanilides in good yields along with N-alkylformanilides.
Preparation of Tetrabutylammonium Dodecamolybdosulfate(VI), [(C4H9)4N]2SMo12O40
Authors: Himeno Sadayuki , Miyashita Keiko , Saito Atsuyoshi , Hori Toshitaka 
Published: May 2006

Abstract
A yellow 12-molybdosulfate(VI) complex was isolated as the tetrabutylammonium (Bu4N+) salt from a 0.05 M (M = mol dm−3) Mo(VI)-0.2 M H2SO4-50% (v/v) CH3COCH3 system containing traces of V(V). The IR and UV-visible spectroscopic and voltammetric characteristics were elucidated.
Gallium Chloride-Mediated Hydrolysis of Dithioacetals
Authors: Saigo Kazuhiko , Hashimoto Yukihiko , Kihara Nobuhiro , Umehara Hideyuki , Hasegawa Masaki 
Published: May 2006

Abstract
Acyclic dithioacetals of ketones are easily hydrolyzed with the action of gallium chloride in the presence of A) water or B) methanol with bubbling oxygen to give the parent carbonyl compounds in high yields.
On the Question: “Why Do Philosophers Neglect the Aesthetics of the Dance?“
Authors: Sparshott Francis 
Published: May 2006

Philosophers writing on aesthetics used to preface their essays by deploring the low standard of thought prevailing in that subject. Since they never tried to show that dullness and folly were less rampant in other fields, one had to recognize in this practice a mere ritual. But one can always speculate on what social purpose rituals had once served. Similarly, philosophers who nowadays write on the aesthetics of dance preface their papers by deploring the tendency of philosophers to neglect the topic. Since they produce no hard evidence of such neglect, this practice too has to be seen as a ritual, and this ritual also calls for explanation. It reflects some unease about the place of dance in the philosophy of art, but the reasons for that unease are not obvious. This paper suggests ways in which the theory of dance might not fit easily into the theory of art in general, or why it might be felt not to do so.IWriting on dance certainly has a low intellectual profile. I had supposed that among the data to be reckoned with were a failure on the part of Hellenistic writers to write dance histories comparable to those histories of painting, sculpture, and music that were so widely read and quoted in the Renaissance, and a corresponding failure in the sixteenth and seventeenth centuries to write handbooks and treatises on the practice of dance comparable to the well-known treatises on the other fine arts from that encyclopedia-ridden age.
The Notion of Mysticism in the Philosophy and Choreography of Mary Wigman 1914-1931
Authors: Howe Dianne S. 
Published: May 2006

Mary Wigman wanted to develop a new dance form, one that could express her personal perception of the spirit of her era and communicate her innermost feelings. What she created in her early choreographies, despite variations in specific works, was a dance in which one of the most prevalent constituents was mysticism, found in the purpose, process, and content of her choreography. It is by virtue of the element of mysticism that Wigman's artwork can be linked to a major aspect of the German Expressionist movement, which had come to full flower in art and drama during Wigman's artistically formative years.German Expressionism was the attempt, by several German artists circa 1907-1925, to express the inner reality of a character, situation, or event rather than the external, scientifically verifiable facts, by portraying the essence, by giving form to experience to convey its universal significance. This expression of the artist's vision, which was intensely individual in style and inspiration yet universal in content, was often marked by distortion or non-realistic symbols used to attain a direct communication from soul to soul, that is, to express the essence of their vision so that it could be apprehended on a sensed level rather than on an intellectual level. The German Expressionist artists, as well as Wigman, developed their own, individual styles according to their particular art medium and individual personalities.
A Preliminary Investigation of Two Variations of the Grand Battement Devant
Authors: Ryman Rhonda S. , Ranney Donald A. 
Published: May 2006

Twentieth century technology has given rise to new and exciting methods for the analysis of human motion. With the aid of the motion picture camera a dancer's kick can be frozen and details invisible in normal viewing can be isolated and analyzed. Electrical detecting devices can uncover secrets about the inner workings of the body, its nerves and muscles. Platforms sensitive to the changing dynamics of a movement can tell us how the body generates force, how it locomotes itself and creates artistic effects and qualities which were previously thought of as “mystical” and “denying natural laws”. Numerous ballet technique manuals offer explanations as to the correct execution of dance movements. Although these descriptions are largely in agreement with one another, they are often in conflict with kinesiological information about the general functioning of the human body. Little research exists in the specific area of kinesiology and dance.It is therefore the goal of the present research to clinically examine one selected dance movement, the grand battement devant, in order to form a kinesiological model of its skeletal and muscular components. This information may help provide a means of assessing the great heritage of traditional ballet theory based largely on personal experience and trial and error, and form a foundation for new theory based on objective analysis. The problem was to discover skeletal and muscular patterns when the grand battement is performed with both legs parallel (patellae facing anteriorly), and with both legs “turned out” (femurs laterally rotated as much as possible at the hip joints).