bluuebunny/crossref_metadata_2025_split huggingface dataset:
The advantages of using Mind Map for learning web Dynpro
Authors: Cristea Ana Daniela , Berdie Adela Diana , Osaci Mihaela , Chirtoc Daniel 
Published: February 2009

AbstractThis article presents an easy study technique, based on a complex and modern informational technology, the Web programming on integrated systems, in particular Web Dynpro Java. The project developed for this learning technique is realised in Mind Map and combines an assembly of utilities, from the transparent presentation of complex concepts to comparative studies and tests used to verify the knowledge, all these being based on a rich collection of applications. Using this learning technique, it is possible to receive either an assembly image on the technology, or to deeply get into the subtlest details. © 2009 Wiley Periodicals, Inc. Comput Appl Eng Educ 19: 201–207, 2011
Experimental Validation of Thin‐layer Drying Models
Authors: Sander A. , Kardum J. P. 
Published: February 2009

AbstractThe present work was aimed at investigating the applicability of the proposed correlation equations that link the coefficients of the thin‐layer equations. Materials of different properties were chosen and dried in four types of laboratory dryers. The experimental data were approximated applying the commonest thin‐layer equations: the Lewis equation, the modified Page's model, and Fick's second law. The best match was achieved with the modified Page's model. The applicability of the stated literature correlations was confirmed. Irrespective of the match between measuring data (X = f(t)) and Lewis equation, the evaluated drying constant K allowed evaluation of the parameters of the employed two‐parameter models.
Quest for Environmentally Benign Ligands for Actinide Separations: Thermodynamic, Spectroscopic, and Structural Characterization of UVI Complexes with Oxa‐Diamide and Related Ligands
Authors: Tian Guoxin , Rao Linfeng , Teat Simon J. , Liu Guokui 
Published: February 2009

AbstractComplexation of UVI with N,N,N′,N′‐tetramethyl‐3‐oxa‐glutaramide (TMOGA) and N,N‐dimethyl‐3‐oxa‐glutaramic acid (DMOGA; see picture) was studied in comparison with their dicarboxylate analogue, oxydiacetic acid (ODA). The stability constants, enthalpy, and entropy of complexation all decrease in the order ODA> DMOGA>TMOGA, showing that the complexation is entropy driven and the substitution of a carboxylate group with an amide group reduces the strength of complexation with UVI due to the decrease in the entropy of complexation (see figure).magnified imageComplexation of UVI with N,N,N′,N′‐tetramethyl‐3‐oxa‐glutaramide (TMOGA) and N,N‐dimethyl‐3‐oxa‐glutaramic acid (DMOGA) was studied in comparison with their dicarboxylate analogue, oxydiacetic acid (ODA). Thermodynamic parameters, including stability constants, enthalpy, and entropy of complexation, were determined by spectrophotometry, potentiometry, and calorimetry. Single‐crystal X‐ray diffraction, EXAFS spectroscopy, FT‐IR absorption spectroscopy, and laser‐induced luminescence spectroscopy were used to obtain structural information on the UVI complexes. Like ODA, TMOGA and DMOGA form tridentate UVI complexes, with three oxygen atoms (the amide, ether, and/or carboxylate oxygen) coordinating to the linear UO22+ ion through the equatorial plane. The stability constants, enthalpy, and entropy of complexation all decrease in the order ODA>DMOGA>TMOGA, showing that the complexation is entropy driven and the substitution of a carboxylate group with an amide group reduces the strength of complexation with UVI due to the decrease in the entropy of complexation. The trend in the thermodynamic stability of the complexes correlates very well with the structural and spectroscopic data obtained by single‐crystal X‐ray diffraction, FT‐IR spectroscopy, and laser‐induced luminescence spectroscopy.
The Nature and Sequence of the Amino Acid Aglycone Strongly Modulates the Conformation and Dynamics Effects of Tn Antigen's Clusters
Authors: Corzana Francisco , Busto Jesús H. , García de Luis Marisa , Jiménez‐Barbero Jesús , Avenoza Alberto , Peregrina Jesús M. 
Published: February 2009

AbstractAll in a cluster: The selected sequence has a crucial influence on both the orientation and flexibility of the carbohydrate moiety in mucin‐type glycopeptides (see picture). This feature can be explained through the varied conformational behavior of the glycosidic linkage of the Thr residue when compared with the Ser residue (see figure). On this basis, and taking into account that these carbohydrates presumably interact with components of the immune system, these findings could be helpful in the design of new cancer vaccines.magnified imageSynthetic oligosaccharide vaccines based on carbohydrate epitopes are currently being evaluated as potential immunotherapeutics in the treatment of cancer. In an effort to study the role that the amino acid moiety (L‐serine and/or L‐threonine residues) plays on the global shape of the resulting glycopeptides and on the dynamics of the carbohydrate moiety, diverse glycopeptides based on the Tn antigen have been synthesized and studied in aqueous solution by combining NMR spectroscopic experiments and molecular dynamics simulations. Our results demonstrate that although the effect of the clustering of Tn on the peptide backbone is not remarkable, it substantially modifies the dynamics, and thus, the presentation features of the carbohydrate moiety. In fact, the selected sequence has a crucial influence on both the orientation and flexibility of the sugar region. Thus, although a serine–threonine pair shows a well‐defined spatial disposition of the Tn epitopes, its analogue sequence threonine–serine allows a certain degree of mobility that could favor the interaction with a diversity of receptors without a major energy penalty. These features can be explained by attending to the different conformational behavior of the glycosidic linkage of threonine‐containing glycopeptides when compared with those of the serine analogues. On this basis, and taking into account that these carbohydrates interact with components of the immune system, these findings could have implications for further design of new cancer vaccines.
Nickel Complexes of a Pincer Amidobis(amine) Ligand: Synthesis, Structure, and Activity in Stoichiometric and Catalytic CC Bond‐Forming Reactions of Alkyl Halides
Authors: Vechorkin Oleg , Csok Zsolt , Scopelliti Rosario , Hu Xile 
Published: February 2009

AbstractGet a grip! NiII complexes of the new pincer amidobis(amine) ligand are described. The Ni chloride complex catalyzes Kumada–Corriu–Tamao coupling of unactivated alkyl halides with alkyl Grignard reagents, as well as double C–C coupling of CH2Cl2 with alkyl Grignard reagents (see schemes).magnified imageThe synthesis, properties, and reactivity of nickel(II) complexes of a newly developed pincer amidobis(amine) ligand (MeNN2) are described. Neutral or cationic complexes [(MeNN2)NiX] (X=OTf (6), OC(O)CH3 (7), CH3CN (8), OMe (9)) were prepared by salt metathesis or chloride abstraction from the previously reported [(MeNN2)NiCl] (1). The Lewis acidity of the {(MeNN2)Ni} fragment was measured by the 1H NMR chemical shift of the coordinated CH3CN molecule in 8. Electrochemical measurements on 1 and 8 indicate that the electron‐donating properties of NN2 are similar to those of the analogous amidobis(phosphine) (pnp) ligands. The solid‐state structures of 6–8 were determined and compared to those of 1 and [(MeNN2)NiEt] (3). In all complexes, the MeNN2 ligand coordinates to the NiII ion in a mer fashion, and the square‐planar coordination sphere of the metal is completed by an additional donor. The coordination chemistry of MeNN2 thus resembles that of other three‐dentate pincer ligands, for example, pnp and arylbis(amine) (ncn). Reactions of 2 with alkyl monohalides, dichlorides, and trichlorides were investigated. Selective CC bond formation was observed in many cases. Based on these reactions, efficient Kumada–Corriu–Tamao coupling of unactivated alkyl halides and alkyl Grignard reagents with 1 as the precatalyst was developed. Good yields were obtained for the coupling of primary and secondary iodides and bromides. Double C–C coupling of CH2Cl2 with alkyl Grignard reagents by 1 was also realized. The scope and limitations of these transformations were studied. Evidence was found for a radical pathway in Ni‐catalyzed C–C cross‐coupling reactions, which involves NiII alkyl intermediates.
Self‐Assembly of Bis(merocyanine) Tweezers into Discrete Bimolecular π‐Stacks
Authors: Lohr Andreas , Grüne Matthias , Würthner Frank 
Published: February 2009

AbstractDipolar aggregation: Examples of a novel class of tweezer molecules have been constructed through the tethering of two dipolar merocyanine chromophores. The electrostatic‐interaction‐directed self‐assembly of these tweezers affords centrosymmetric bimolecular complexes with a unique aggregate geometry of four π‐stacked chromophores (see picture) with an alternating arrangement of their dipole moments and very high dimerization constants, even in the good solvating solvent chloroform.magnified imageExamples of a novel class of tweezer molecules have been constructed through the tethering of two dipolar merocyanine chromophores by a naphthalenedimethylene or dimethylenediphenylmethane spacer. The electrostatic‐interaction‐directed self‐assembly of these bis(merocyanine) tweezers affords centrosymmetric bimolecular complexes with very high dimerization constants of up to >109 M−1, even in the good solvating solvent chloroform. This pronounced self‐association of the bis(merocyanine) tweezers is attributed to the strongly dipolar nature of the merocyanine chromophores and a unique aggregate geometry of four π‐stacked chromophores with an alternating arrangement of their dipole moments. The structural assignment of the tetrachromophoric π‐stack has been accomplished by MALDI‐TOF mass spectrometry and ROESY NMR spectroscopy. Furthermore, molecular modeling studies have accounted for the relationships between the dimerization constants and optical properties of the bimolecular complexes of the present bis(merocyanine) dyes and the structure of the spacer and the positions at which the merocyanine chromophores are attached.
Rhodium(I)‐Catalyzed Reductive Cyclocarbonylation of Internal Alkynes: Atom‐Economic Process for Synthesis of 2‐Cyclopenten‐1‐ones, 5‐Alkylidenefuran‐2(5 H)‐ones and Indan‐1‐ones
Authors: Huang Qiufeng , Hua Ruimao 
Published: February 2009

AbstractEconomical atoms: 2‐Cyclopenten‐1‐ones, 5‐alkylidenefuran‐2(5 H)‐ones and indan‐1‐ones have been synthesized by atom‐economic reductive cyclocarbonylation of internal alkynes with carbon monoxide catalyzed by [{RhCl(CO)2}2]/CO(NH2)2 in the presence of water (see scheme).magnified imageThe reductive cyclocarbonylation of internal alkynes with carbon monoxide catalyzed by [{RhCl(CO)2}2]/CO(NH2)2 in the presence of water has been investigated. Dialkyl alkynes underwent a reductive [2+2+1] cyclocarbonylation to afford selectively cis‐2‐cyclopenten‐1‐ones in high yields. In the cases of diarylacetylenes used, both trans‐2‐cyclopenten‐1‐ones and 5‐alkylidenefuran‐2(5 H)‐ones were obtained, and the presence of electron‐withdrawing group on the benzene ring enhanced the formation of 5‐alkylidenefuran‐2(5 H)‐ones. On the other hand, ortho‐substituted diarylacetylenes underwent a reductive [4+1] cyclocarbonylation to produce selectively indan‐1‐ones in good yields.
Divalent Silicon(0) Compounds
Authors: Takagi Nozomi , Shimizu Takayasu , Frenking Gernot 
Published: February 2009

AbstractBridge of Si's: Quantum‐chemical calculations suggest that the bonding situation in the recently synthesized “trisilaallene” is better described in terms of donor–acceptor interactions between two silylene ligands L and a naked silicon atom Si, which carries two lone‐pair orbitals, yielding the silylone SiL2. Further silylones SiL2 with different donor ligands Si have also been calculated, which might be possible to synthesize.magnified imageQuantum‐chemical calculations of the geometries and electronic structures of a series of dicoordinated silicon compounds SiL2, in which L is a five‐membered cyclic species suggest that the molecules are divalent silicon(0) compounds that possess two L→Si donor–acceptor bonds and two lone‐pair MOs with π and σ symmetry at silicon. The classification as a dicoordinate silicon compound with L→Si←L donor–acceptor bonds applies not only to molecules in which L is an N‐heterocyclic carbene but also when L is a cyclic silylene. The recently synthesized “trisilaallene” (S. Ishida, T. Iwamoto, C. Kabuto, M. Kira, Nature 2003, 421, 725), which has a bending angle of 136.5o for the central moiety, and which was written as SiSiSi, is probably better considered as a divalent silicon(0) compound. We suggest the name silylones for the latter species in analogy to silylenes which identify divalent SiII compounds. This bonding interpretation explains the theoretically predicted large values for the first and second proton affinities and for the large bond dissociation energies for one and two BH3 ligands. The calculations predict that the first protonation of the divalent silicon(0) compounds takes place at the π lone‐pair orbital, which yields protonated silylones that have a pyramidal arrangement of the ligands at the central tricoordinate silicon atom. Silylones SiL2 could be interesting ligands for transition‐metal compounds. The calculated structures and bonding situation of the analogous carbon compounds are also reported.
ChemInform Abstract: Structure and Bonding in Cyclic Isomers of B2AlHnm (n = 3—6, m = ‐2 to +1): A Comparative Study with B3Hnm, BAl2Hnm and Al3Hnm
Authors: Mallick Dibyendu , Parameswaran Pattiyil , Jemmis Eluvathingal D. 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Crystal Structure and Lattice Dynamics of Sr3Y(BO3)3.
Authors: Maczka M. , Waskowska A. , Majchrowski A. , Kisielewski J. , Szyrski W. , Hanuza J. 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: X‐Ray and Neutron Powder Diffraction Studies of Ba(NdxY2‐x)CuO5.
Authors: Liu G. , Huang Q. , Kaduk J. A. , Yang Z. , Lucas C. , Wong‐Ng W. 
Published: February 2009

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 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, Raman and Rietveld Analysis of Thorium Diphosphate.
Authors: Clavier Nicolas , Wallez Gilles , Dacheux Nicolas , Bregiroux Damien , Quarton Michel , Beaunier Patricia 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: General Synthesis and Structural Evolution of a Layered Family of Ln8(OH)20Cl4×nH2O (Ln: Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Y).
Authors: Geng Fengxia , Matsushita Yoshitaka , Ma Renzhi , Xin Hao , Tanaka Masahiko , Izumi Fujio , Iyi Nobuo , Sasaki Takayoshi 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Crystal and Electronic Structures, Luminescence Properties of Eu2+‐Doped Si6‐zAlzOzN8‐z and MySi6‐zAlz‐yOz+yN8‐z‐y (M: 2Li, Mg, Ca, Sr, Ba).
Authors: Li Y. Q. , Hirosaki N. , Xie R. J. , Takeda T. , Mitomo M. 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Unconventional Superconductivity in Ba0.6K0.4Fe2As2 from Inelastic Neutron Scattering.
Authors: Christianson A. D. , et al. et al. 
Published: February 2009

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 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, Crystal Structure and Magnetic Properties of a New Pillared Perovskite La5Mo2.75V1.25O16.
Authors: Ramezanipour Farshid , Derakhshan Shahab , Greedan John E. , Cranswick Lachlan M. D. 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Isothermal Section of the Dy—Fe—Ge Ternary System at 773 K.
Authors: Zhuang Y. H. , Ma C. H. , Li K. F. , Chen X. 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Isothermal Section of the Gd—Fe—Ge Ternary System at 773 K.
Authors: Zhuang Y. H. , Li K. F. , Ma C. H. , Chen X. 
Published: February 2009

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 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, Crystal Structure and NLO Property of a Nonmetal Pentaborate [C6H13N2] [B5O6(OH)4].
Authors: Liu Huan‐Xin , Liang Yun‐Xiao , Jiang Xiao 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Temperature Influence on the Formation of Selenidoantimonates: Solvothermal Syntheses, Crystal Structures and Thermal Properties of [Ni(dien)2]2Sb2Se6, [Mn(dien)2]2(SbSe4)(Cl), [Co(dien)2]2(SbSe4)(Br), and [Co(dien)2]3(SbSe4)2.
Authors: Jin Qin‐yan , Zhu Ai‐mei , Pan Ying‐li , Jia Ding‐xian , Zhang Yong , Gu Jian‐sheng 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Nitridogermanate Nitrides Sr7[GeN4]N2 and Ca7[GeN4]N2: Synthesis Employing Sodium Melts, Crystal Structure, and Density‐Functional Theory Calculations.
Authors: Junggeburth Sebastian C. , Oeckler Oliver , Johrendt Dirk , Schnick Wolfgang 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Syntheses, Structures, and Magnetic and Optical Properties of the Compounds [Hg3Te2][UCl6] and [Hg4As2][UCl6].
Authors: Bugaris Daniel E. , Ibers James A. 
Published: February 2009

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 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 Continuous Symmetry Measure of [4Fe—4S]+ Core Distortions and Analysis of Supramolecular Synthons in Crystal Structures of (Et4N)3 [Fe4S4Cl4]×Et4NCl at 100 and 295 K.
Authors: Hagen Karl S. , Uddin Mohammad 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Phosphinomethyl‐oxazolines as Efficient Ligands for the Iridium‐Catalyzed Enantioselective Hydrogenation of Unfunctionalized Tetrasubstituted Olefins.
Authors: Schrems Marcus G. , Neumann Eva , Pfaltz Andreas 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Asymmetric Conjugate Addition of Nitroalkanes to Enones with a Chiral α‐Aminophosphonate Catalyst.
Authors: Malmgren Marcus , Granander Johan , Amedjkouh Mohamed 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: New Chiral Tetraaza Ligands for the Efficient Enantioselective Addition of Dialkylzinc to Aromatic Aldehydes.
Authors: Burguete M. Isabel , Escorihuela Jorge , Luis Santiago V. , Lledos Agusti , Ujaque Gregori 
Published: February 2009

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 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 Bicyclo[3.1.0]hexanones via 1,3‐Dipolar Cycloaddition of Diazoalkanes to Homochiral α‐Sulfinyl‐2‐cyclopentenones.
Authors: Garcia Ruano Jose Luis , Alonso Marina , Cruz David , Fraile Alberto , Martin M. Rosario , Peromingo M. Teresa , Tito Amelia , Yuste Francisco 
Published: February 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.