bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: A New Application of Friedel‐Crafts Acylation for the Synthesis of Trinuclear Compounds.
Authors: MAHATO S. B. , LUGER P. , WEBER M. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthetic Studies Towards Phorbols: A Stereocontrolled Synthesis of the Phorbol Skeleton in the Naturally Occurring Form.
Authors: SHIGENO K. , SASAI H. , SHIBASAKI M. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Oxidative Cleavage of Indan‐1,2,3‐trione‐Ene Adducts: A Convenient Synthesis of Allyl and Allenyl Carboxylic Acids.
Authors: GILL G. B. , IDRIS M. S. HJ. , KIROLLOS K. S. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Short‐Step Synthesis of Chiral C2‐Symmetric 2,3,4,5‐Tetrasubstituted Pyrrolidines from D‐Mannitol and Their Use as Chiral Ligands in the Reaction of Diethylzinc and Benzaldehyde.
Authors: MASAKI Y. , ODA H. , KAZUTA K. , USUI A. , ITOH A. , XU F. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Catalytic Asymmetric Synthesis of Quarternary Carbon Centers. Palladium‐Catalyzed Formation of Either Enantiomer of Spirooxindoles and Related Spirocyclics Using a Single Enantiomer of a Chiral Diphosphine Ligand.
Authors: ASHIMORI A. , OVERMAN L. E. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Large‐Scale Preparation of the Sulfur‐Transfer Reagent 3H‐1,2‐ Benzodithiol‐3‐one 1,1‐Dioxide.
Authors: REGAN J. B. , PHILLIPS L. R. , BEAUCAGE S. L. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Formation of Pyrazol‐3‐ylacetohydrazides by Reaction of Methyl 3‐Hydroxythiophene‐2‐carboxylates with Hydrazine Hydrate.
Authors: BARKER J. M. , HUDDLESTON P. R. , WOOD M. L. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Bis(indazolyl)alkanes from 1‐Hydroxyalkylindazoles.
Authors: LOPEZ M. C. , CLARAMUNT R. M. , BALLESTEROS P. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Properties of the N,N′‐Bis(1,3‐indandionyl‐2)imidazolium Betaine.
Authors: RAISKUMA I. K. , NEILAND O. YA. , KAMPARE R. B. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Novel Route to N‐(Benzotriazol‐1‐ylmethyl)amides.
Authors: KATRITZKY A. R. , GALUSZKA B. , ZHANG Y. , RACHWAL S. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of 4‐Aroyl‐((5‐phenyl‐2(2H)‐tetrazolyl)‐1‐oxoethyl)thiosemicarbazides and 4‐Aroyl‐5‐((5‐phenyl‐2(2H)‐tetrazolyl)methyl)‐1,2,4‐ (4H)‐triazole‐3‐thione.
Authors: FENG X. , CHEN R. , CAI S. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Potentially Biological Agents: Synthesis and Reactivity of Thienopyrrolo(1,4)diazepines.
Authors: DAICH A. , DECROIX B. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and CCK‐B Binding Affinities of Cyclic Analogues of the Potent and Selective CCK‐B Receptor Antagonist CI‐988.
Authors: DIDIER E. , HORWELL D. C. , PRITCHARD M. C. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A New Short and Convergent Route to Macrodiolides.
Authors: LE FLOC'H Y. , YVERGNAUX F. , GREE R. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Vinylboronates β‐Substituted by an Electron‐ Withdrawing Group: A New Class of Electron‐Poor Olefins.
Authors: RASSET‐DELOGE C. , MARTINEZ‐FRESNEDA P. , VAULTIER M. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Acylsilanes via Transmetalation of 1‐ Triorganosilyloxyvinyltin Derivatives.
Authors: VERLHAC J.‐B. , KWON H. , PEREYRE M. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Lewis Acid‐Mediated Reactions of 2‐Stannyl‐3‐silylpropene (I) with Acid Chlorides (II). Formation of Vinylsilanes (III) via 1,2‐Silyl Migration and Destannylation.
Authors: KANG K.‐T. , LEE J. C. , U J. S. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Reactivity of Diazomethylenephosphoranes.
Authors: SOTIROPOULOS J. M. , BACEIREDO A. , BERTRAND G. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Is There Any Electronic Delocalization Operative in cis‐1,2‐Dihydro‐1, 2‐diphosphetes? Structural Comparison of cis and trans‐1,2‐Dihydro‐1,2‐ diphosphetes.
Authors: MAIGROT N. , RICARD L. , CHARRIER C. , LE GOFF P. , MATHEY F. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Homolytic Substitution at Selenium: A Convenient Synthesis of Benzoselenophenes.
Authors: SCHIESSER C. H. , SUTEJ K. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Germanium and Tin Compounds. Part 12. A Telluratrigermetane by Tellurium Insertion into a Cyclotrigermane.
Authors: WEIDENBRUCH M. , RITSCHL A. , PETERS K. , VON SCHNERING H. G. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereoselective Opening of Chiral α‐Stannylacetals with Organometallic Reagents.
Authors: PARRAIN J.‐L. , CINTRAT J.‐C. , QUINTARD J.‐P. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: N‐2‐(2,4‐Dinitrophenyl)ethyloxycarbonyl Amino Acids, New Base Labile Protected Derivatives Suitable for Solid‐Phase Peptide Synthesis.
Authors: ACEDO M. , ALBERICIO F. , ERITJA R. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Enantioselective Synthesis of Episulfide Analogues of L‐Methionine.
Authors: GUILLERM D. , GUILLERM C. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereoselective Aminohomologation of Chiral α‐Alkoxy Aldehydes via Thiazole Addition to Nitrones. Application to the Synthesis of N‐ Acetyl‐D‐mannosamine.
Authors: DONDONI A. , JUNQUERA F. , MERCHAN F. L. , MERINO P. , TEJERO T. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Deoxydinucleoside Phosphates Containing 4‐Thiosubstituted Pyrimidine Nucleobases.
Authors: CLIVIO P. , FOURREY J.‐L. , GASCHE J. , FAVRE A. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Convenient Syntheses of Optically Active Abscisic Acid and Xanthoxin.
Authors: SAKAI K. , TAKAHASHI K. , NUKANO T. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Approaches to Stacked, Semiconducting Organometallics
Authors: SIEBERT W. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: (m)Ferrocenophanes and Multibridged (mn)Ferrocenophanes
Authors: HISATOME M. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Asymmetric Diels‐Alder Reactions of Chiral α,β ‐Unsaturated Sulfoxides Bearing a 2‐exo‐Hydroxy‐10‐bornyl Group as an Efficient Ligand on the Sulfur Center
Authors: ARAI Y. , KOIZUMI T. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Neoglycoconjugates: Fundamentals and Recent Progresses.
Authors: LEE Y. C. , LEE R. T. 
Published: July 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Probability distribution of digital sum variation for bimode pulse transmission code
Authors: Kasai Hiroyuki , Fujii Akira 
Published: July 2007

AbstractA variety of coding types are proposed to improve the information transmission efficiency for a digital relay and transmission system. Quantitative estimation is required to clarify coding effectiveness with respect to the frequency region of timing waveform sampling characteristics and the time region of intercode interference based on low‐frequency cutoff. Formerly, various calculations were proposed to use the power spectrum for the former purpose and no consideration was given to the latter.This paper explains how to calculate the probability distribution of digital sum variations to estimate pulse transmission code performance in the time region. Since there are instances where the digital sum variations do not reach a desired state as a result of dc component suppression, the transition probability matrix cannot be determined. The transition probability matrix is then determined by introduction of a new parameter called the state vector, whereby the probability distribution can be calculated. Distribution probabilities for the 4B‐3T code digital sum variation are calculated as a practical application of calculation methods. Error rate performances considering these distributions are shown.These calculation methods may permit the estimation of pulse transmission code performance in conjunction with the power spectrum formerly used for the estimation of transmission code performance.
Design of a quadrature modulator consisting of gaAs‐FET double‐balanced mixers
Authors: Yamao Yasushi , Suzuki Hiroshi 
Published: July 2007

AbstractIn order to realize a mobile communication system using MSK narrow‐band digital FM modulation, a high‐accuracy and low‐dissipation power IC modulator is needed. In this paper a digital IC double‐balanced mixer, employing a D‐A converter and FET analog switch, is proposed and the design method of a quadrature modulator using this kind of mixer is explained. The spurious level contained in the modulated output signal is analyzed; then the accuracy required of the D‐A converter in order to reduce the spurious level is determined. Next, the relationship is obtained between the upper limit of the carrier frequency of the signal, whose spurious level specification is satisfied by the modulator, and the FET parameters. GaAs FET measurements confirm the analytical results, namely, a quadrature modulator with lower than ‐40 dB spurious level up to about 1 GHz can be achieved.
Numerical analysis of unbounded poisson and helmholtz problem using indefinite element approach
Authors: Kagawa Yukio , Yamabuchi Tatsuo , Kawakami Katsumi 
Published: July 2007

AbstractIn many cases in electrostatic or acoustic field analysis, the infinite region must be considered; this is difficult to handle by the usual finite‐element method. As a means to handle such cases, the region containing sources and complex configurations are considered as the finite region, and the rest as the infinite region. Then, the usual finite‐element method is applied to the finite region, and the infinite region is partitioned into infinite elements. Two types of infinite element have been proposed: by Bettes‐Zienkiewicz and a hybrid type by Pian‐Moriya. The former does not depend on the model, being general in nature, but integration over the infinite region and the determination of the attenuation parameter are required. In contrast, the latter type of infinite element utilizes the general solution of the system equation in the element, which provides a more accurate solution. Furthermore, since the element is of the boundary type, the integration is generally easier than in the former case. The bandwidth of the discrete equation is the same as that of the finite region. This paper considers Poisson and Helmholtz equations and formulates the three‐dimensional parametric element. As computational examples, simple models for the two‐dimensional electrostatic problem, and two‐ and three‐dimensional acoustic radiation problems are considered as computational examples, and the two types of infinite elements are compared and discussed.
Unipole‐slot array antennas
Authors: Ishizone Takayuki , Yokoyama Yukio , Nishimura Shoichi , Mushiake Yasuto 
Published: July 2007

AbstractOne of the self‐complementary antennas is axially symmetric and three‐dimensional. Since this antenna has an axially‐symmetrical antenna, made of a finite‐sized plate, it becomes a hard‐to‐control multibeam antenna. to obtain a single beam we remove one of the unipole arrays from a self‐complementary unipole‐slot array antenna made of two planes intersecting orthogonally. the unipole‐slot array antenna to be studied then becomes a quasi‐self‐complementary antenna. First, we derive analytically that the unipole‐slot antenna has a constant impedance of 2.30 and show that this antenna has a single beam. Next, to develop a broadband high gain antenna, we analyze a unipole‐slot array antenna using a network technique and derive the relation between the gain and the structural parameters of an array antenna with a common scaling ratio. It is shown numerically that this quasi‐self‐complementary antenna maintains a constant impedance characteristic. These theoretical results are confirmed experimentally with an antenna made of finite conductors.
Design of time division switching networks considering amount of control
Authors: Ogino Nagao , Numao Masayuki , Saito Tadao , Inose Hiroshi 
Published: July 2007

AbstractThe amount of network control as well as the traffic efficiency should be considered in designing a network satisfying the overall economy of the switching system. If high‐speed PCM is adopted, T‐S‐T networks are preferable from the traffic efficiency viewpoint. However, S‐T‐S networks can be preferable from the viewpoint of the amount of control. In this paper, a preferable form of S‐T‐S time division networks is derived from the results of the simulation of the network control processes. S‐T‐S type networks are compared with T‐S‐T type networks from the viewpoints of both the traffic efficiency and the amount of control, and it is revealed that S‐T‐S type networks require less control. Finally, a desired network form satisfying the overall economy is clarified in terms of the whole time division networks including both T‐S‐T types and S‐T‐S types.
Numerical analysis of polarization‐maintaining single‐mode optical fibers with circular pits
Authors: Hosono Toshio , Hinata Takashi , Yoshikawa Hiroshi 
Published: July 2007

AbstractThis paper proposes new structures for a polarization‐maintaining optical fiber with axially asymmetric index distribution: (1) a single circular‐pit fiber (SCF), (2) a double circular‐pit fiber (DCF), (3) a non‐coaxial W‐type fiber (NWF). Numerical analyses of their propagation characteristics are based on a new point‐matching method whose computation error is limited only by the mode number truncation error. It is shown that values of β/k0 as large as 3.0 × 10−4 can be obtained with air pits in the SCF and DCF structures.