bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis of 1,1′‐Binaphthyl‐2,2′‐diyl Phosphoroselenoic Amides and Their Conversion to Optically Pure Phosphoramidites.
Authors: Murai Toshiaki , Inaji Shinsuke , Morishita Ken , Shibahara Fumitoshi , Tokunaga Makoto , Obora Yasushi , Tsuji Yasushi 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Efficient Protocol for Reductive Amination of Aldehydes and Ketones with Sodium Borohydride in an Ionic Liquid/H2O System.
Authors: Nagaiah K. , Kumar V. Naveen , Rao R. Srinivasa , Reddy B. V. S. , Narsaiah A. V. , Yadav J. S. 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The Willgerodt—Kindler Reaction in Water: High Chemoselectivity of Benzaldehydes over Acetophenones.
Authors: Aghapoor Kioumars , Mohsenzadeh Farshid , Khanalizadeh Golriz , Darabi Hossein R. 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Aryl Sulfoxides via Palladium‐Catalyzed Arylation of Sulfenate Anions.
Authors: Maitro Guillaume , Vogel Sophie , Prestat Guillaume , Madec David , Poli Giovanni 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Sulfonyl Chloride Formation from Thiol Derivatives by N‐Chlorosuccinimide Mediated Oxidation.
Authors: Nishiguchi Atsuko , Maeda Kazuhiro , Miki Shokyo 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
An Efficient Modification of the Hofmann Rearrangement: Synthesis of Methyl Carbamates.
Authors: Gogoi Pranjal , Konwar Dilip 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective Reductive Coupling of 1,3‐Enynes to Heterocyclic Aromatic Aldehydes and Ketones via Rhodium‐Catalyzed Asymmetric Hydrogenation: Mechanistic Insight into the Role of Broensted Acid Additives.
Authors: Komanduri Venukrishnan , Krische Michael J. 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of γ‐Alkylidenebutenolides by Formal [3 + 2] Cyclizations of 1,5‐ and 2,4‐Bis(trimethylsilyloxy)‐1,3,5‐hexatrienes with Oxalyl Chloride.
Authors: Freifeld Ilia , Bose Gopal , Eckhardt Tobias , Langer Peter 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Green Protocol for the Synthesis of Bis‐indolylmethanes and Bis‐indolylglycoconjugates in the Presence of Iron(III) Fluoride as a Heterogeneous, Reusable, and Eco‐Friendly Catalyst.
Authors: Kamble Vinod T. , Bandgar Babasaheb P. , Suryawanshi Satish B. , Bavikar Sudhir N. 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Protocol to Synthesize Spiro‐1,4‐dihydropyridines by Using a Multicomponent Reaction of Cyclohexanone, Ethyl Cyanoacetate, Isatin, and Primary Amines under Microwave Irradiation.
Authors: Hatamjafari Farhad 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective Direct Aza Hetero‐Diels—Alder Reaction Catalyzed by Chiral Broensted Acids.
Authors: Liu Hua , Cun Lin‐Feng , Mi Ai‐Qiao , Jiang Yao‐Zhong , Gong Liu‐Zhu 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of New 3,4‐Di‐ and 1,2,3,4‐Tetrahydroquinazolin‐4‐one Derivatives and X‐Ray Diffraction Study of Crystal Solvates of 3‐Methylsulfonylamino‐2‐ (2‐methylsulfonylaminophenyl)‐1,2,3,4‐tetrahydroquinazolin‐4‐one.
Authors: Ukhin L. Yu. , Kuz'mina L. G. 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Heterophase N‐Aminomethylation of 5‐Arylidenepseudothiohydantoins by Arylamines and Aqueous Formaldehyde in Aromatic Solvents: Effect of Substituents in the Heterocyclic Substrate and the Aryl Amine on the Efficiency of the Process.
Authors: Ramsh S. M. , Medvedskiy N. L. , Uryupov S. O. 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Stable P‐Heterocyclic Carbenes: Scope and Limitations.
Authors: Masuda Jason D. , Martin David , Lyon‐Saunier Celine , Baceiredo Antoine , Gornitzka Heinz , Donnadieu Bruno , Bertrand Guy 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective Radical Addition Reactions to the C=N Bond Utilizing Chiral Quaternary Ammonium Salts of Hypophosphorous Acid in Aqueous Media.
Authors: Cho Dae Hyan , Jang Doo Ok 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Convenient and Efficient Preparation of N‐Protected (α‐Aminoacyl)oxy‐Substituted Terpenes and Alkanes.
Authors: Katritzky Alan R. , Angrish Parul 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Precursors of Chiral α‐Amino Anions: An Improved Synthesis of Chiral N‐(α‐Tributylstannylorgano)oxazolidin‐2‐ones Derived from (R)‐ or (S)‐Phenylglycinol.
Authors: Coeffard Vincent , Le Grognec Erwan , Beaudet Isabelle , Lepeltier Marc , Leat‐Crest Veronique , Quintard Jean‐Paul 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Transglycosylation Through the Reduction of C‐1 Position of Sialic Acid.
Authors: Kikkawa Muneyoshi , Yoshino Teruo 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A Facile Two‐Step Synthesis of 8‐Arylated Guanosine Mono‐ and Triphosphates (8‐Aryl GXPs).
Authors: Collier Alice , Wagner Gerd 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
RK‐95113, a New Angiogenesis Inhibitor Produced by Aspergillus fumigatus.
Authors: Asami Yukihiro , Kakeya Hideaki , Okada Gen , Toi Masakazu , Osada Hiroyuki 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Lamellar Reaction Phenomena — From Intercalation to Nanomaterials Formation
Authors: McKelvy Michael J. , Sharma Renu , Chizmeshya Andrew V. G. 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
High‐Yield Fabrication and Electrochemical Characterization of Tetrapodal CdSe, CdTe, and CdSexTe1‐x Nanocrystals
Authors: Li Yunchao , Zhong Haizheng , Li Rui , Zhou Yi , Yang Chunhe , Li Yongfang 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Rhodium(I)‐ or Palladium(II)‐Catalyzed 1,4‐Additions of Organoboron, ‐silicon and ‐bismuth Compounds to Electron‐Deficient Alkenes
Authors: Yamamoto Yasunori , Nishikata Takashi , Miyaura Norio 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Engineering Void Space in Organic van der Waals Crystals: Calixarenes Lead the Way
Authors: Dalgarno Scott J. , Thallapally Praveen K. , Barbour Leonard J. , Atwood Jerry L. 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Elucidation of Chiral Recognition Mechanism During Preferential and Diastereomeric Crystallizations, and Application to the Development and Utilization of Artificial Enantiopure Compounds
Authors: Saigo Kazuhiko 
Published: April 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Multivariate prediction of the probability of recurrence in patients with carcinoma of the parotid gland
Authors: Carrillo José F. , Vázquez Rafael , Ramírez‐Ortega Margarita C. , Cano Ana , Ochoa‐Carrillo Francisco J. , Oñate‐Ocaña Luis F. 
Published: April 2007

AbstractBACKGROUNDParotid gland carcinoma is an infrequent tumor, and series that report on these neoplasms are relatively scarce in the literature. The objective of the current study was to identify prognostic factors in patients with parotid gland carcinoma and to develop a method for defining the probability of recurrence.METHODSPatients with parotid gland carcinoma who were treated at the authors' institution from January 1981 through December 2004 and who completed treatment constituted the study group. Disease‐free survival was calculated by using the Kaplan‐Meier method. Logistic regression analysis was employed to define the recurrence‐associated prognostic factors.RESULTSOne hundred twenty‐seven patients were included (64 men and 63 women); their mean age was 53 years. Mucoepidermoid carcinoma was diagnosed in 34.6% of patients, adenoid cystic was diagnosed in 15.7% of patients, adenocarcinoma was diagnosed in 14.3% of patients, and acinic cell carcinoma was diagnosed in 9.4% of patients. The median disease‐free survival was 8.3 years (95% confidence interval [95% CI], 4.3–12.2 years). Logistic regression analysis confirmed tumor classification, facial nerve palsy, grade of tumor differentiation, patient age, and surgical margins as recurrence‐associated factors (P < .00001). Using this model, 3 postoperative risk groups were defined—high‐risk, intermediate‐risk, and low‐risk—that had recurrence frequencies of 71.4%, 43.1%, and 8.8%, respectively (P = .0001). The 5‐year disease‐free survival rates for these groups were 18.7%, 53.9%, and 99.9%, respectively (P = .00001).CONCLUSIONSIn this study, the authors identified several significant prognostic factors. Consequently, they have proposed a prognostic score categorization that allows for a straightforward calculation of the risk of recurrence for a given patient that may help to define therapeutic strategies, target patient counseling, and design future trials. Cancer 2007. © 2007 American Cancer Society.
Experimental and theoretical study of recovery mechanism of impurity effect by the addition of EDTA
Authors: Asakuma Y. , Nishimura M. , Kimura M. , Ang H. M. , Tade M. O. , Maeda K. , Fukui K. 
Published: April 2007

AbstractThe impurity effect by trivalent metal ion such as Al3+, Fe3+ and Cr3+ during crystal growth of KDP is reasonably well documented. If a metal ion is adsorbed onto the crystal surface, it prevents the step propagation relevant to the crystal growth rate. However, this impurity adsorption mechanism is still not well understood. Recently, in our work on the addition of chelate agents, a recovery effect of the metal ion adsorption was discovered. However, its recovery mechanism is not clearly understood both theoretically and phenomenally. In this research, ethylene‐diamine‐tetra‐acetic acid, EDTA, which is the most common chelate agent, was used as a recovery agent. The recovery mechanism was considered from the correlation of experimental data and the interfacial distribution model that we proposed in our former study. Furthermore, quantum calculation of EDTA metal complex can explain the relaxation of impurity adsorption by the addition of EDTA. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Probabilistic approach to protein crystal nucleation
Authors: Nanev Christo N. , Dimitrov Ivaylo 
Published: April 2007

AbstractSimple probabilistic model for step‐wise growth of polymers is used for making some parallels with the nucleation of protein crystals. Although the considerations are made within 1D case, this approximation still shows some important peculiarities of protein crystal nucleation and growth. Thus, the present approach turns out to be useful for interpretation of some important experimental results regarding these processes. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
SiC crystal growth from transition metal silicide fluxes
Authors: Yang Guangyi , Wu Renbing , Gao Mingxia , Chen Jianjun , Pan Yi 
Published: April 2007

AbstractSiC crystal growth in transition metal silicide melts was investigated by using spontaneous infiltration and solution methods. In the infiltration experiments, SiC powder preforms were infiltrated with FexSiy (Fe3Si, Fe5Si3 and FeSi) and CoSi melts. The dissolution and precipitation of SiC led to SiC crystals growth in the infiltrated Fe5Si3 and CoSi melts, SiC particles coalescing in FeSi and free carbon precipitation in Fe3Si. In the solution experiments, carbon from the graphite crucible dissolved in and reacted with FeSi2 and Ti2.3Si7.7 to form SiC crystals. Scanning electron microscopy (SEM), X‐ray diffraction (XRD) and Raman scattering spectrometer were employed to investigate SiC crystals growth. Based on the investigation, the effect of solution content on the SiC crystal growth, the growth mechanisms in both methods and prototypes of the SiC crystals are also discussed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Growth of Nd:Sr3Ga2Ge4O14 crystals by a modified Bridgman method
Authors: Wu Anhua , Ding Jiaxuan , Xu Jiayue , Li Xinhua 
Published: April 2007

AbstractBridgman growth of Nd:SGG (Sr3Ga2Ge4O14) crystals has been investigated for the first time. Pt crucible of ∅︁25mm×250mm with a seed well of ∅︁10mm×80 mm is used, and seed is SGG crystal of ∅︁10mm×50mm grown by Bridgman method in advance. The growth parameters are optimized as the furnace temperature is set to 1450∼1500°C, temperature gradient in the crystal‐melt interface is less than 25 K/cm and growth rate is less than 0.5mm/h. The Nd:SGG crystals with 25mm in diameter and 60mm in length are grown successfully from 1.5 to 8at% Nd3+ doped stoichiometric Sr3Ga2Ge4O14 melt. The distribution coefficient and concentration of Nd3+ in Nd:SGG crystals are obviously higher than those of Nd:YAG crystal. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Template‐directed growth and characterization of flowerlike porous carbonated hydroxyapatite spheres
Authors: He Qian Jun , Huang Zhi Liang 
Published: April 2007

AbstractFlowerlike porous carbonated hydroxyapatite (CHAp) spheres were synthesized by the template‐directed homogeneous precipitation method. The carbonate content of synthetic CHAp determined by carbon elemental analysis was about 1.50 wt/wt. FT‐IR and XRD were employed to analyze the chemical composition of porous CHAp and SEM was used to observe crystal morphology. We studied the effect of the concentration [Ca] and [P] on ingredient and structure, the effect of urea on hierarchical structure, and the effect of the template on morphology. The results suggested that the lower concentration of [Ca] and [P] was advantageous to purity and monodispersity, that the resultant would be prone to a fancy assembly of big flakes into disks at the lower concentration of urea, and that the aperture could be regulated from micrometer size to nanometer size via altering the concentration of the template. This porous material with the hierarchical structure exhibits especial surface characteristics and has a high surface area, showing potential applications. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Preparation and characterization of chemically deposited (Cd0.7‐Zn0.3)S:CdCl2,Gd nanocrystalline films
Authors: Shrivastava S. , Verma B. 
Published: April 2007

AbstractNanocrystalline films of (Cd0.7‐Zn0.3)S:CdCl2,Gd are prepared by chemical deposition technique on microscopic glass substrates with varied concentrations of capping agents thiophenol and methanol. The deposition is based on the principle of precipitation followed by condensation. Results of XRD, SEM, optical absorption spectra and photoluminescence emission spectra are presented. The crystalline nature of (Cd0.7‐Zn0.3)S:CdCl2,Gd was found by XRD studies in which different diffraction peaks of CdS and ZnS are observed. The SEM micrographs show long tubes and irregular distributions of particles in presence of capping agents. The blue shift observed from optical absorption spectra in the present case indicates a quantization effect. Band gaps are also found to increase due to particle size reduction. The photoluminescence emission spectra show shift of peaks in the lower wavelength side due to reduction in particle size. The particle sizes are determined from optical absorption and XRD studies. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Growth and characterization of semiorganic nonlinear optical tetrakis thiourea nickel chloride single crystals
Authors: Bhaskaran A. , Ragavan C. M. , Sankar R. , Mohankumar R. , Jayavel R. 
Published: April 2007

AbstractA new nonlinear optical material tetrakis thiourea nickel chloride (TTNC) was synthesized and single crystals were grown from mixed solvent of water and isopropanol by both slow evaporation and slow cooling methods. The grown crystals were characterized by powder X‐ray diffraction analyses to confirm the crystal structure. The presence of functional groups and the coordination of metal ions to thiourea were confirmed by FTIR and Raman spectroscopy analyses. UV‐VIS spectrum was recorded to study the optical transparency of the grown crystals. Thermal properties of the crystals have been by investigated using thermo gravimetric (TG) and differential thermal analyses (DTA), which indicate that the material does not decompose before melting. The second order nonlinear optical property of the grown crystal was examined by Kurtz powder technique and mechanical behavior was studied by Vicker's microhardness test. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Synthesis, crystal structure and third order nonlinear optical properties of bis(tetra‐n‐propylammonium) bis(2‐thioxo‐1,3‐dithiole‐4,5‐dithiolato)cuprate(II)
Authors: Guo W. F. , Sun X. B. , Sun J. , Yu W. T. , Wang X. Q. , Zhang G. H. , Xu D. 
Published: April 2007

AbstractA novel bis (dmit) complex of copper (II), [(C3H7)4N]2[Cu(dmit)2] (1), where dmit is 2‐thioxo‐1,3‐dithiole‐4,5‐dithiolate, was prepared and structurally characterized by X‐ray single crystal diffraction. The copper (II) atom is tetracoordinated by four dmit S atoms, forming a nearly square planar arrangement. The [Cu(dmit)2]2‐ anions and the [(C3H7)4N]+ counter‐cations form a three‐dimensional solid‐state structure by C–H…S hydrogen bonds. The third‐order nonlinear optical properties of the complex were determined by picosecond Z‐scan technique at a wavelength of 1064 nm. The results indicate the compound exhibits reverse saturation absorption and self‐defocusing performance. The molecular second‐order hyperpolarizability γ is calculated to be as high as (1.8±0.2)×10‐30 esu. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Corporate social reporting: segmentation and characterization of Spanish companies
Authors: García‐Sánchez Isabel Ma 
Published: April 2007

AbstractThis study establishes a new methodology in the analysis of the corporate social information disclosed by companies, since the objective pursued does not concentrate on showing the amount of information issued by each one of the companies individually, but rather on grouping them, taking into consideration their similarity in content and in the characteristics of the information revealed.Afterwards, those characteristics were identified that define or help determine membership in each segment or informative group. This shows that the similarity in the content and the characteristics of the information revealed is positively associated with larger‐sized companies that belong to certain sectors of business activity. Copyright © 2007 John Wiley & Sons, Ltd and ERP Environment.
On the Modelling of a Nonequilibrium Spherical Microwave Discharge at Atmospheric Pressure
Authors: Rafatov I. R. 
Published: April 2007

AbstractThe work presents results of calculation of a spherical microwave discharge characteristics in an argon at atmospheric pressure against the external parameters (the mode, frequency and power of the applied electromagnetic field and the size of the discharge chamber). Model assumes a thermal and ionization non‐equilibrium of discharge plasma and takes into account first three modes of incident electromagnetic waves. Calculation results are compared with the results for the ionization equilibrium model. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Thermally Conducting Partially Ionized Plasma in a Variable Magnetic Field
Authors: Shaikh S. , Khan A. , Bhatia P. K. 
Published: April 2007

AbstractAn infinitely extending homogenous partially ionized plasma endowed with several physical mechanisms and permeated by a variable magnetic field is considered. The combined effect of these parameters, namely, Hall currents, finite conductivity, ion viscosity, collision with neutrals and thermal conductivity on the gravitational instability of the plasma is studied. It is found that the several mechanisms play different physical roles in the perturbed problem. Jeans' Criterion is analyzed in the framework of Tsallis' statistics for possible modifications due to the presence of nonextensive effects. A simple generalization of the Jeans' criterion is obtained and the standard values are obtained in the limiting case q = 1, q being the nonextensive parameter. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)