bluuebunny/crossref_metadata_2025_split huggingface dataset:
Solvent Extraction of Transition Metal Ions with Acyclic Polyethers Incorporating Several Heteroatoms and Bearing Heterocyclic Moieties as End Groups
Authors: Sakamoto Hidefumi , Ito Shigeki , Otomo Makoto 
Published: March 2006

Abstract
Nine acyclic polyethers incorporating oxygen, nitrogen and/or sulfur atoms were synthesized, which possess two heterocyclic groups at both ends of an ether chain, and metal ion extractabilities of these compounds were estimated using 1,2-dichloroethane - H2O system. On the solvent extraction of some transition metal ions as the nitrates, Ag+, Cu+ and Hg2+ were more effectively extracted with most of the reagents than the other metal ions. Addition of picrate ion into the aqueous phase of AgNO3 increased Ag+ extractability remarkably.
Dinuclear Manganese(III) Complex with Cyclam-based Dodecadentate Ligand Bearing Schiff-base Pendants (Cyclam = 1,4,8,11-Tetraazacyclotetradecane)
Authors: Mikuriya Masahiro , Yamazaki Yuka 
Published: March 2006

Abstract
Novel dinuclear manganese(III) complex with a new dodecadentate ligand, 1,4,8,11-tetrakis(2-5-chlorosalicylideneaminoethyl)-1,4,8,11-tetraazacyclotetradecane (H4L), [Mn2(L)(CH3COO)2]·2CHCl3 has been synthesized and characterized by X-ray crystallography.
The Photocatalytic Decomposition of Nitric Oxide on the Silver(I) Ion-exchanged ZSM-5 Catalyst
Authors: Matsuoka Masaya , Matsuda Emi , Tsuji Kouji , Yamashita Hiromi , Anpo Masakazu 
Published: March 2006

Abstract
UV irradiation of the Ag+/ZSM-5 catalyst prepared by an ion-exchange method in the presence of NO led to the photocatalytic decomposition of NO into N2, N2O and NO2 at temperatures as low as 298 K. Investigations of in-situ XANES, ESR, and DRS of the Ag+/ZSM-5 catalyst as well as the effective wavelengths of the irradiated UV light indicated that the excited state of the Ag+ ion included within the zeolite cavities plays a significant role in the photocatalytic decomposition of NO molecules.
Highly Thermally-Stable Diels-Alder Adducts of [60]Fullerene with 2-Cycloalkenones and Their Acetals
Authors: Takeshita Hitoshi , Liu Ji-Feng , Kato Nobuo , Mori Akira , Isobe Ryuichi 
Published: March 2006

Abstract
A [4+2] monoadduct with improved thermal stability was obtained from the reaction of [60]fullerene with 2,5-dioxaspiro[4.4]non-6-ene, a masked 4π-component, under high-pressure conditions (300 MPa) at 130 °C in toluene in 85% yield. Hydrolysis of the adduct gave the corresponding ketone, which was also obtained by the reaction of [60]fullerene with cyclopentenone. Even at 150 °C for 15 h, no cycloreversion of the adducts was observed.
α-Helix Propensities of Amino Acids Studied by Multicanonical Algorithm
Authors: Okamoto Yuko , Hansmann Ulrich H E , Nakazawa Takashi 
Published: March 2006

Abstract
We report the results of multicanonical simulations on α-helix propensities of homo-oligomers of nonpolar amino acids. Three characteristic amino acids are considered: alanine (helix former), glycine (helix breaker), and valine (helix indifferent). Starting simulations from completely random initial conformations, we have calculated the average % helix, free energy differences of helix-coil transitions, and the Zimm-Bragg s parameters over a wide range of temperatures. The results are shown to be in good agreement with experiments.
Highly Diastereoselective Synthesis of d-threo- and d-erythro-Sphingosine from Glycidol
Authors: Katsumura Shigeo , Yamamoto Noriyoshi , Fukuda Etsuko , Iwama Seiji 
Published: March 2006

Abstract
d-Threo- and d-erythro-sphingosine, (1) and (2), inhibitors of protein kinase C, have been efficiently synthesized from glycidol through (R)-4-methoxycarbonyloxazolidinone (3) by selective mono-alkylation followed by highly diastereoselective reduction of the tin-substituted pentadecenyl ketone 5.
Histidine Containing Porphyrins Directed for Two Metal Binding Sites
Authors: Ushiyama Masato , Katayama Yoji , Yamamura Takeshi 
Published: March 2006

Abstract
Three types of histidine containing porphyrins different in the protection of imidazole N were synthesized by attaching four l-histidyl-glycyl moieties to α,α,α,α-meso-tetra(o-aminophenyl) porphyrin.
Synthesis of Protected Peptides Containing Phosphoserine with Oxime Resin
Authors: Mihara Hisakazu , Kuwahara Hiromiki , Niidome Takuro , Kanegae Hiroshi , Aoyagi Haruhiko 
Published: March 2006

Abstract
A protected peptide containing phosphoserine was successfully synthesized by the solid-phase method using the oxime resin. The protected phosphopeptide was utilized to further elongation to a longer peptide and conjugation to a template molecule.
Novel Domain Structures in the Mixed Monolayer Films Identified by Atomic Force Microscopy
Authors: Wu Hai-Ming , Xiao Shou-Jun , Lu Zu-Hong , Wei Yu 
Published: March 2006

Abstract
Phase separation was observed by atomic force microscopy in the mixed monolayer films composed of arachidic acid (AA) and 5,10,15-triphenyl-20-(4-dl-α-phenylalanylamindo)phenyl porphyrin (TPPP). Under different preparation conditions, the mixtures exhibit only AA domains or a coexistence structure of AA domains, TPPP domains and downy structures constructed by AA and TPPP together. Different UV-Vis spectra were obtained in the two kinds of phase-separated structures.
Inclusion Selectivity of the Zeolite-Mimetic Host Clathrate [N(CH3)4·xG][Cd3(CN)7] for Aromatic C8H10 (= G) Isomers, Ethylbenzene and Xylenes
Authors: Kim Chong-Hyeak , Nishikiori Shin-ichi , Iwamoto Toschitake 
Published: March 2006

Abstract
The anionic host [Cd3(CN)7−]n with the three-dimensional structure like zeolite shows the highest inclusion selectivity for ethylbenzene from the binary, ternary, and quarternary mixtures of ethylbenzene and three xylene isomers in the fractional enclathration-crystallization process; p-xylene is the second.
Oxygen Atom Transfers from μ-Oxo-bis(Oxomolybdenum(V) Porphyrin) to Chromium(II) Porphyrins in Toluene
Authors: Yamashita Shinichi , Imamura Taira , Sasaki Yoichi 
Published: March 2006

Abstract
Simple complete oxygen-atom transfers between metalloporphyrins mediated by two-electron pathways were observed quantitatively from μ-oxo-bis(oxomolybdenum(V) porphyrin), [MoO(tpp)]2O,1 to chromium(II) porphyrins, Cr(por) (por = tpp or oep), in toluene.
O=Mo(tpp)-O-(tpp)Mo=O + Cr(por) → 2O=Mo(tpp) + O=Cr(por)
The presence of excess of CrII(por) yielded [CrIII(por)]2O.
Influence of Incorporation of 4,4′-Biphenol and Hydroquinone Units into Poly(ethylene terephthalate) on the Crystallization Properties
Authors: Sakaguchi Yoshimitsu 
Published: March 2006

Abstract
A PET copolymer containing small amount of 4,4′-diphenyldicarboxylic acid and 4,4′-biphenol showed higher crystallization rate than PET at the crystallization temperatures below 160 °C. When hydroquinone was incorporated instead of 4,4′-biphenol, the crystallization rate was lower than that of PET at whole range of crystallization temperatures. These results suggest a possibility of increasing the crystallization rate of PET by incorporation of an appropriate arylate-unit.
Synthesis of 3-Bromo-1,5- and -1,7-Azulenequinones Having Some Alkyl or Phenyl Group by the Polybromination and Reductive Debromination of Their Bromo-Substituent
Authors: Nozoe Tetsuo , Wakabayashi Hidetsugu , Shindo Kimio , Yasunami Masafumi 
Published: March 2006

Abstract
2-Methyl-, 2-phenyl-, 5- and 6-isopropylazulenes, and 5-isopropyl- and 6-isopropyl-2-methylazulenes were led to the corresponding 1,5- and 1,7-azulenequinones by polybromination in aqueous THF. 1-Carboxylic acid derivatives of these alkylazulenes also gave same products. Three isomeric 2-methyl derivatives of 3,3-biazulenequinones were produced from 2-methylazulene as minor products. Treatment of bromoazulenequinones with tin powder in acetic acid afforded the corresponding parent quinones.
Diaza-18-crown-6-based Sugar Receptor Bearing Two Boronic Acids. Possible Communication between Bound Sugars and Metal Cations
Authors: Nakashima Kazuaki , Shinkai Seiji 
Published: March 2006

Abstract
A novel diaza-18-crown-6-based sugar receptor (1) bearing two boronic acids has been developed. In 1 boronic acids in the side arms and a metal cation bound to the crown cavity competitively interact as Lewis acids with amines. It was shown that sugars and metal cations can “communicate” each other in an allosteric manner.
Preparation and Extraction of Ca@C60
Authors: Kubozono Yoshihiro , Ohta Takayoshi , Hayashibara Tosiyuki , Maeda Hironobu , Ishida Hiroyuki , Kashino Setsuo , Oshima Kokichi , Yamazaki Hitoshi , Ukita Sigeyuki , Sogabe Toshiaki 
Published: March 2006

Abstract
Endohedral metallofullerene Ca@C60 has been prepared by archeating of graphite rod containing calcium oxide, CaO, and extracted by pyridine under the oxygen-free condition. The laser desorption time-of-flight (LD-TOF) mass spectrum of the pyridine solution exhibits five main peaks due to C60+, Ca@C60+, C70+, Ca@C70+, and C74+. It has been found that Ca@C60 can be extracted only under the atmosphere of degassed pyridine owing to its high oxygen-sensitivity.
Preparation of Enolates from α-Haloketones with n-BuLi, PhMgBr, or Et2Zn via Halogen-Metal Exchange Reaction
Authors: Aoki Yoshitaka , Oshima Koichiro , Utimoto Kiitiro 
Published: March 2006

Abstract
Metal-halogen exchange of α-iodoketones was performed upon treatment with n-BuLi, PhMgBr, Et2Zn or Me3Al in ether at 0 °C to give the corresponding metal enolates which reacted with aldehydes to provide the aldol type products in good yields.
Kinetic Behaviors of Solubilization of C60 into Water by Complexation with γ-Cyclodextrin
Authors: Kuroda Yasuhisa , Nozawa Hiroshi , Ogoshi Hisanobu 
Published: March 2006

Abstract
Kinetic behavior of complexation of C60 with γ-cyclodextrin and its derivative in an aqueous solution at 50 °C was investigated. Effective solubilization of C60 into water, which shows first order dependency on the concentration of unsubstituted γ-cyclodextrin under present conditions, is observed. However, γ-cyclodextrin having an ammonium cation moiety on the primary site shows no sign of extraction of C60.
Efficient α-Alkylation of α-Amino Acids by Means of a Novel Pyridoxal Model Compound
Authors: Miyashita Kazuyuki , Miyabe Hideto , Kurozumi Chiaki , Imanishi Takeshi 
Published: March 2006

Abstract
α-Alkyl-α-amino esters were prepared by the alkylation of α-imino esters obtained from α-amino acids and a novel PLP model compound possessing a Li+ ionophore character.
Atrazine-selective Polymer Prepared by Molecular Imprinting Technique
Authors: Matsui Jun , Doblhoff-Dier Otto , Takeuchi Toshifumi 
Published: March 2006

Abstract
A synthetic atrazine-selective polymer was prepared by molecular imprinting technique. Liquid-chromatographic (LC) tests were performed using both the polymer imprinted against atrazine and a reference non-imprinted polymer as LC stationary phases. Atrazine was retained 13-fold longer in the imprinted polymer than in the non-imprinted polymer.
The Reason Why K10 is an Effective Promoter for meso-Tetraalkylporphyrin Synthesis
Authors: Shinoda Tomotaka , Onaka Makoto , Izumi Yusuke 
Published: March 2006

Abstract
The reason why K10 is an efficient promoter for porphyrin synthesis is found to be due mainly to the mesoporosity rather than to the acid property of K10, by comparing K10 with progressively acid-treated montmorillonites.
Proposed Models of Mesopore Structures in Sulfuric Acid-Treated Montmorillonites and K10
Authors: Shinoda Tomotaka , Onaka Makoto , Izumi Yusuke 
Published: March 2006

Abstract
The models of pore structures of commercially available K10 and sulfuric acid-treated montmorillonites are proposed on the basis of XRD, NMR, and N2 adsorption-desorption isotherm measurements.
Molecular Design of Chromogenic Calix[4]crowns Which Show Very High Na+ Selectivity
Authors: Yamamoto Hiromasa , Ueda Keiko , Sandanayake K R A Samankumara , Shinkai Seiji 
Published: March 2006

Abstract
Chromogenic calix[4]crowns bearing a short crown strap for the metal recognition and an azophenol unit for the optical reading-out were designed and synthesized. Two-phase solvent-extraction established that they show remarkably high Na+/K+(&gt;103.1) selectivity. This discrimination ability is high enough to apply them as a Na+-selective ionophore for optical sensing systems.
Two Dimensional Photoinduced Electron Transfer (PET) Fluorescence Sensor for Saccharides
Authors: Sandanayake K R A Samankumara , James Tony D , Shinkai Seiji 
Published: March 2006

Abstract
The cooperative binding of two boronic acid moieties has been utilized to create a two dimensional fluorescence sensor for saccharides. The photoinduced electron transfer switching mechanism has been used to provide information of saccharide concentration while the excimer emission changes of the pyrene moieties provide the nature of the complex.
The π-Trianion Radical of 2,3,6,7-Tetracyanobenzo[1,2-b:4,5-b’]bisdithiole-4,8-dione. Observation of ESR with 13C-Satellites in Natural Abundance
Authors: Hirayama Masatoshi , Itasaka Manabu , Suzuki Takanori , Yamashita Yoshiro , Miyashi Tsutomu 
Published: March 2006

Abstract
The π-trianion radical of the title compound was formed by electrolysis in acetonitrile and its ESR spectrum with 13C satellites in natural abundance was observed, which was clearly identified by MO calculation.
Isolation and X-Ray Structure of a New 3,6-Diketo Steroid from Red Alga Hypnea Musciformis
Authors: Gosavi Kalpana , Babu J Moses , Mathur Hari Har , Bhadbhade Mohan 
Published: March 2006

Abstract
The structure of a 3,6-diketo steroid, isolated from red alga Hypnea musciformis is the first of this class to be confirmed by X-ray analysis. Ring junctions A/B, B/C and C/D are all trans ; the configuration of angular methyl groups at C(10), C(13) and the cholesterol-like side chain with a double bond C22=C23 emanating from C(17) have been settled as ß-axial.
A New Homologous Series of Phenol Derivatives Exhibiting Liquid Crystalline Phase
Authors: Sakagami Sakumitsu , Takase Akira 
Published: March 2006

Abstract
A new homologous series of 4-(4-n-alkoxy-2-hydroxybenzylideneamino)phenol was synthesized, and the phase transitions were determined using a differential scanning calorimeter and an ordinary polarizing microscope. It is shown that the homologues having a terminal alkoxyl chain longer than C10-member exhibit a smectic phase through an intermolecular hydrogen bonding.
Peroxidase Activity of Cytochrome c Generated by Phenylboronic Acid Modification
Authors: Hamachi Itaru , Kimura Onari , Takeshita Hiroshi , Shinkai Seiji 
Published: March 2006

Abstract
Reactive amino residues of horse heart cytochrome c were successfully modified with 4-boronobenzoic acid N-hydroxysuccinimide ester 1. The modified cytochrome c shows an enhanced peroxidase activity, which can be regulated by the addition of sugars.
1,2-Asymmetric Induction in the Intramolecular [2+2] Cycloadditions of Keteniminium Salts. Enantioselective Syntheses of (−)-Dihydroactinidiolide and (−)-Anastrephin
Authors: Irie Osamu , Shishido Kozo 
Published: March 2006

Abstract
1,2-Asymmetric induction in the intramolecular [2+2] cycloadditions of the keteniminium salts resulted in the preferential formation of optically pure bicyclo[4.2.0]octan-7-ones (13a,b). These cycloadducts, 13a and 13b, were successfully converted into the key intermediates of (−)-dihydroactinidiolide and (−)-anastrephin, respectively.
Photolysis of Perfluoroazooctane in Perfluorohexane upon 185 nm Irradiation
Authors: Nakamura Takako , Yabe Akira 
Published: March 2006

Abstract
The photolysis of perfluoroazooctane in perfluorohexane upon 185 nm irradiation was investigated by means of quantum yield, light intensity dependence, and UV-vis spectra of the photolysis of perfluoroazooctane. Perfluoroazooctane (trans isomer) was photoisomerized by one photon absorption to cis isomer, followed by extrusion of nitrogen by another photon absorption.
Separation of Chlorophylls by Micellar Electrokinetic Chromatography with Pyridine-Added Running Solution
Authors: Kato Hisashi , Saitoh Koichi , Teramae Norio 
Published: March 2006

Abstract
Successful separation of chlorophylls-a, -b, -c1 and -c2 can be obtained in about 15 min by MEKC with the running solution containing 50 mmol/dm3 SDS (pH 11)-pyridine (10:3, v/v).
Structure and Properties of an Organic Metal (BEDT-TTP)2I3
Authors: Mori Takehiko , Misaki Yohji , Yamabe Tokio , Mori Hatsumi , Tanaka Shoji 
Published: March 2006

Abstract
An organic radical-cation salt (BEDT-TTP)2I3, where BEDT-TTP (2,5-bis(4,5-ethylenedithio-1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene) is a bis-fused analog of BEDT-TTF (bis(ethylenedithio)tetrathiafulvalene), has a donor arrangement similar to β-(BEDT-TTF)2I3. (BEDT-TTP)2I3 shows high conductivity 900 S cm−1 at room temperature, and retains its metallic conductivity down to 0.5 K.
The Site of the Sonochemically-Initiated Radical Reaction of Lead Tetraacetate with β-Methylstyrene
Authors: Kimura Takahide , Fujita Mitsue , Sohmiya Hajime , Ando Takashi 
Published: March 2006

Abstract
The effective temperature of the radical propagation step of the ultrasonically accelerated reaction of lead tetraacetate with β-methylstyrene was thermodynamically determined as close to the ambient temperature of the bulk liquid.
Electrocatalytic Dehydrofluorination of Poly(vinylidene fluoride)
Authors: Kijima Masashi , Toyabe Tsuyoshi , Shirakawa Hideki 
Published: March 2006

Abstract
Poly(vinylidene fluoride) was dehydrofluorinated by cathodic electrolysis in DMF in the presence of t-BuOH as a mediator under the anaerobic conditions, giving poly(fluoroacetylene) with a carbyne moiety. Electrical conductivity of the product was 3.9 × 10−3 S cm−1 upon I2 doping.
Thermal Decomposition of Lanthanum Trifluoromethanesulfonate
Authors: Yanagihara Naohisa , Nakamura Shin , Nakayama Masayoshi 
Published: March 2006

Abstract
Lanthanum trifluoride (LaF3) has been obtained as the final product of the thermal decomposition of the corresponding trifluoro-methanesulfonate [La(OTf)3]. The decomposition processes up to 600 °C were characterized by means of TG, DTA, XRD and MS. It was revealed that the over all reaction scheme for the decomposition proceeds as follow: La(OTf)3→ LaF3 + 3SO2 + CO2 + CF3OCF3.
Remarkable Effect of Surfactant on Flavin Photochemistry: Monomerization of Thymine Cyclobutane Dimers Photosensitized by Flavins in the Presence of SDS in Aqueous Solution
Authors: Yasuda Masahide , Nakazono Takumi , Hamasaki Takeshi , Nishinaka Yoshimasa , Nakamura Nobuya , Pac Chyongjin , Shima Kensuke 
Published: March 2006

Abstract
The photosensitization capability of tetra-O-acyl riboflavins in the monomerization of the cis,syn-cyclobutane dimers of 1,3-dimethylthymine and 1-propylthymine in aqueous solutions was remarkably enhanced by sodium dodecyl sulfate at higher concentration than critical micelle concentration.
Highly Stereoselective Synthesis of Trisubstituted γ,δ-Unsaturated Acid and Aldehyde via Ketal Claisen Rearrangement
Authors: Takayanagi Hisao , Morinaka Yasuhiro 
Published: March 2006

Abstract
A new sequence for the highly stereoselective (E&gt;99%) synthesis of a trisubstituted γ,δ-unsaturated acid (3), which consists of a ketal Claisen rearrangement of a terpene allylic alcohol with 2,2-dimethoxy-3-methyl-3-butanol and a subsequent oxidative cleavage of the resulting α-ketol, is applicable even to the preparation of 3 which is difficult to synthesize by traditional methods. The related procedure for preparation of the corresponding aldehyde is also described.
Homogeneous Bimetallic Catalysts for Production of Carboxylic Acids from Carbon Dioxide, Hydrogen, and Organic Iodides
Authors: Fukuoka Atsushi , Gotoh Naotaka , Kobayashi Norikazu , Hirano Masafumi , Komiya Sanshiro 
Published: March 2006

Abstract
Carboxylic acids RCOOH (R = Me, Et, Ph) are catalytically produced from carbon dioxide, dihydrogen, and the corresponding organic iodides in the presence of homogeneous Ru/Co or Ni/Co bimetallic catalysts.
High Resolution ESR Spectra as Obtained by FT-ESR Spectroscopy
Authors: Mizuta Yukio , Kohno Masahiro , Fujii Kanae , Yoshida Ekuo , Kuwata Keiji 
Published: March 2006

Abstract
Superhyperfine couplings due to K+ in K+/ duroquinone− ion-pair system in DME solution were clearly observed by use of FT-ESR spectroscopy. The superhyperfine coupling constant obtained at room temperature suggested that the population of the unpaired electron on the 39K+ 4s orbital was as small as 0.14%.
Synthesis of 1-Formyl-1,2-dihydroquinoline Derivatives by a Lewis Acid-Catalyzed Cyclization of o-(1-Hydroxy-2-alkenyl)phenyl Isocyanides
Authors: Kobayashi Kazuhiro , Nagato Satoshi , Kawakita Masataka , Morikawa Osamu , Konishi Hisatoshi 
Published: March 2006

Abstract
An efficient route to 1-formyl-1,2-dihydroquinolines 6 is described based on the BF3-catalyzed cyclization of o-(1-hydroxy-2-alkenyl)phenyl isocyanides 4, which can be prepared feasibly by the reaction of N-(o-acylphenyl)formamides 1 with alkenylmagnesium bromides 2 followed by treatment of the resulting hydroxy formamides 3 with phosphorous oxychloride.
Collection of Metal(II)-1-(2-Pyridylazo)-2-naphthol Complexes in Nonionic Surfactant Assembly Adsorbed on Silica Gel
Authors: Bessho Kotaro , Saitoh Koichi , Teramae Norio 
Published: March 2006

Abstract
The nonionic surfactant phase adsorbed on silica gel is proposed as a new medium for the separation and concentration of trace metal chelates. The 1-(2-pyridylazo)-2-naphthol chelates of Ni(II) and Zn(II) can be concentrated into the nonionic surfactant phase on silica gel. It was found that these hydrophobic compounds were collected by dissolution into the surfactant assembly formed at the silica / water interface.
Synthesis of Novel π-Conjugated Cyclic Trinuclear Complex of Cobalt(III) and Intramolecular Electronic Interactions in Its Reduced Forms
Authors: Okuno Mika , Aramaki Kunitsugu , Nakajima Shin-ichiro , Watanabe Tokuko , Nishihara Hiroshi 
Published: March 2006

Abstract
An oligomerization reaction of an ethylene-1,2-dithiolatocobalt complex, [CoCp(S2C2H2)](Cp = η5-cyclopentadienyl)) (1) in HBr-MeCN-H2O in air affords a conjugated trinuclear complex, [Co3Cp3(S6C6)] (3), that undergoes reversible three-step 1e− reductions in aprotic solvents. Electrochemical, optical and magnetic properties of 3 and its reduced forms are reported.
Quinone-Mediated Bioelectrochemical Reduction of NAD(P)+ Catalyzed by Flavoproteins
Authors: Kano Kenji , Takagi Kazuyoshi , Ogino Yasuhiro , Ikeda Tokuji 
Published: March 2006

Abstract
Adriamycin, anthracycline antibiotics, has been found to work as an effective mediator in bioelectrochemical reduction of NAD(P)H catalyzed by ferredoxin-NADP+ reductase or diaphorase. The regeneration system has been satisfactory combined with NAD(P)H-dependent enzymatic reactions.
ESR Study of Radiation Induced Radicals Formed on Tetrafluoroethylene Adsorbed on Mordenite Zeolites
Authors: Yahiro Hidenori , Yamaji Kazumitsu , Shiotani Masaru 
Published: March 2006

Abstract
Two radicals, hydrogen addition-type radicals (CF2H-CF2•), and propagating radical of polytetrafluoroethylene (R-CF2-CF2•), were generated by γ-irradiation of tetrafluoroethylene adsorbed on zeolites. The formation mechanisms for two radicals are discussed based on the ESR results.
Synthesis of Helical Polymers by Polycondensation of Diboronic Acid and Chiral Tetrols
Authors: Mikami Masafumi , Shinkai Seiji 
Published: March 2006

Abstract
Polymers containing sugar units in the main chain were synthesized by polycondensation of diboronic acid and C2-symmetrical chiral tetrols. Spectroscopic studies and theoretical calculations established that they possess a DNA-like helical structure.