bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: A Hydrogen Bond Surrogate Approach for Stabilization of Short Peptide Sequences in α‐Helical Conformation
Authors: Patgiri Anupam , Jochim Andrea L. , Arora Paramjit S. 
Published: December 2008

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: Peptide and Protein Mimetics Inhibiting Amyloid β‐Peptide Aggregation
Authors: Takahashi Tsuyoshi , Mihara Hisakazu 
Published: December 2008

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: Peptide Mimics by Linear Arylamides: A Structural and Functional Diversity Test
Authors: Li Zhan‐Ting , Hou Jun‐Li , Li Chuang 
Published: December 2008

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: Artificial β‐Barrels
Authors: Sakai Naomi , Mareda Jiri , Matile Stefan 
Published: December 2008

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: Tedanolide and the Evolution of Polyketide Inhibitors of Eukaryotic Protein Synthesis
Authors: Taylor Richard E. 
Published: December 2008

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 Chemistry and Biology of Organic Guanidine Derivatives
Authors: Berlinck Roberto G. S. , Burtoloso Antonio Carlos B. , Kossuga Miriam H. 
Published: December 2008

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: Natural Products from the True Mangrove Flora: Source, Chemistry and Bioactivities
Authors: Wu Jun , Xiao Qiang , Xu Jing , Li Min‐Yi , Pan Jian‐Yu , Yang Mei‐hua 
Published: December 2008

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: Organophosphorus Supramolecular Chemistry. Part 2. Organophosphorus Receptors
Authors: Mlynarz Piotr , Rudzinska Ewa , Berlicki Lukasz , Kafarski Pawel 
Published: December 2008

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: Solid State Amorphization of Pharmaceuticals
Authors: Willart J. F. , Descamps M. 
Published: December 2008

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: Electron—Proton Effect and the Structure of Excited Molecular Complexes
Authors: Kalninsh K. K. 
Published: December 2008

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: Ordered Porous Thin Films in Electrochemical Analysis
Authors: Walcarius Alain , Kuhn Alexander 
Published: December 2008

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.
DFT Study of Effects of Potassium Doping on Band Structure of Crystalline Cuprous Azide
Authors: ZHU Wei‐Hua , ZHANG Xiao‐Wen , WEI Tao , XIAO He‐Ming 
Published: December 2008

AbstractThe structure and defect formation energies of the K‐doped CuN3 were studied using density functional theory within the generalized gradient approximation. The results show that the K‐doping breaks the azide symmetry and causes asymmetric atomic displacement. As the K‐doping level increases, the band gap of the doped system gradually increases. The K impurity is easily incorporated into the crystal thermodynamically. The Cu vacancy is easily created thermodynamically and the K impurity can serve as nucleation centers for vacancy clustering. Finally the effects of K‐doping concentrations on the sensitivity of CuN3 were understood based on electronic structures.
Thermochemical Study on [La(Hsal)2·(tch)]·2H2O [Hsal=salicylate (C7H5O3−), tch=thioprolinate (C4H6NO2S−)]
Authors: YANG De‐Jun , LI Xu , LI Qiang‐Guo , LI Ai‐Tao , YE Li‐Juan , JIANG Jian‐Hong , LIU Yi 
Published: December 2008

AbstractThe product from reaction of lanthanum chloride heptahydrate with salicylic acid and thioproline, [La(Hsal)2·(tch)]·2H2O, was synthesized and characterized by IR, elemental analysis, molar conductance, thermogravimatric analysis and chemistry analysis. The standard molar enthalpies of solution of LaCl3·7H2O (s), [2C7H6O3 (s)], C4H7NO2S (s) and [La(Hsal)2·(tch)]·2H2O (s) in a mixed solvent of absolute ethyl alcohol, dimethyl sulfoxide (DMSO) and 3 mol·L−1 HCl were determined by calorimetry to be ΔsHm⊖[LaCl3·7H2O (s), 298.15 K] = (−102.36±0.66) kJ·mol−1, ΔsHm⊖[2C7H6O3 (s), 298.15 K] = (26.65±0.22) kJ·mol−1, ΔsHm⊖[C4H7NO2S (s), 298.15 K] = (−21.79±0.35) kJ·mol−1 and ΔsHm⊖{[La(Hsal)2·(tch)]·2H2O (s), 298.15 K}= (−41.10±0.32) kJ·mol−1. The enthalpy change of the reaction LaCl3·7H2O (s)+2C7H6O3 (s)+C4H7NO2S (s) = [La(Hsal)2·(tch)]·2H2O (s)+3HCl (g)+5H2O (l) (Eq. 1) was determined to be ΔrHm⊖= (41.02±0.85) kJ·mol−1. From date in the literature, through Hess' law, the standard molar enthalpy of formation of [La(Hsal)2·(tch)]·2H2O (s) was estimated to be ΔfHm⊖{[La(Hsal)2·(tch)]·2H2O (s), 298.15 K}= (−3017.0±3.7) kJ·mol−1.
Photocatalytic Activity for Water Decomposition to Hydrogen over Nitrogen‐doped TiO2 Nanoparticle
Authors: LI Xiao‐Bo , JIANG Xiao‐Ying , HUANG Jian‐Hua , WANG Xue‐Jing 
Published: December 2008

AbstractNitrogen‐doped TiO2 nanoparticle photocatalysts were obtained by an annealing method with gaseous ammonia and nitrogen. The influence of dopant N on the crystal structure was characterized by XRD, XPS, BET, TEM and UV‐Vis spectra. The results of XRD indicate that, the crystal phase transforms from anatase to rutile structure gradually with increase of annealing temperature from 300 to 700 °C. XPS studies indicate that the nitrogen atom enters the TiO2 lattice and occupies the position of oxygen atom. Agglomeration of particles is found in TEM images after annealing. BET results show that the specific surface areas of N‐doped samples from 44.61 to 38.27 m2/g are smaller than that of Degussa TiO2. UV‐Vis spectra indicate that the absorption threshold shifts gradually with increase of annealing temperature, which shows absorption in the visible region. The influence of annealing condition on the photocatalytic property has been researched over water decomposition to hydrogen, indicating that nitrogen raises the photocatalytic activity for hydrogen evolution, and the modified TiO2 annealed for 2 h at 400 °C under gas of NH3/N2 (V/V=1/2) mixture shows better efficiency of hydrogen evolution. Furthermore, the N‐doped TiO2 nanoparticle catalysts have obvious visible light activity, evidenced by hydrogen evolution under visible light (λ>400 nm) irradiation. However, the catalytic activity under visible light irradiation is absent for Degussa as reference and the N‐doped TiO2 annealed at 700 °C.
A Piezoelectric Immunosensor Based on Agglutination Reaction with Amplification of Silica Nanoparticles
Authors: JIN Xiao‐Yong , JIN Xue‐Fang , DING Yan‐Jun , JIANG Jian‐Hui , SHEN Guo‐Li , YU Ru‐Qin 
Published: December 2008

AbstractA simple piezoelectric immunoagglutination assay technique with antibody‐modified nanoparticles has been developed for direct quantitative detection of protein. The proposed technique is based on the specific agglutination of goat anti‐hIgG‐coated silica (or gold) nanoparticles in the presence of human immunoglobulin G (hIgG), which causes a frequency change and is monitored by a piezoelectric device. The antibody modified on the probe surface would combine with antibody‐coated nanoparticles in the presence of antigen (hIgG) when the surface agglutination reaction took place, which couples both the mass effect and viscoelastic effect acting on the probe. The results indicate that the background interference can be substantially minimized and the probe signal can be observably multiplied. In addition, the surface of the modified probe and that after combining the complex of immunoagglutination were imaged by scanning electronic microscopy (SEM). Moreover, an optimization of assay medium composition with the addition of poly(ethylene glycol) (PEG) serving as immunoagglutination enhancer and sodium chloride to control the ion‐strength was investigated. The frequency responses of the immunoagglutination assay were found to correlate well with the hIgG concentration with a detection limit of 84 ng·mL−1.
An Efficient One‐pot Synthesis of β‐Amino/β‐Acetamido Carbonyl Compounds via ZrCl4‐catalyzed Mannich‐type Reactio
Authors: SANJEEVA REDDY Cherkupally , PURNACHANDRA REDDY Gurrala 
Published: December 2008

AbstractZirconium(IV) chloride catalyzed efficient one‐pot synthesis of β‐amino/β‐acetamido carbonyl compounds at room temperature is described. In the presence of ZrCl4, the three‐component Mannich‐type reaction via a variety of in situ generated aldimines, with various ketones, aromatic aldehydes and aromatic amines in ethanol, led to the formation of β‐amino carbonyl compounds and the four‐component Mannich‐type reaction of aromatic aldehydes with various ketones, acetonitrile and acetyl chloride resulted in the corresponding β‐acetamido carbonyl compounds in high to excellent yields. This methodology has also been applied towards the synthesis of dimeric β‐amino/β‐acetamido carbonyl compounds.
Four New Cembrane Diterpenes from the Hainan Soft Coral Lobophytum sp.
Authors: CHEN Si‐Han , HUANG Hui , GUO Yue‐Wei 
Published: December 2008

AbstractFour new cembrane diterpenes, 19‐hydroxy‐sarcocrassolide (1), 18‐deacetyldeepoxy lobolide (2), 13‐hydroxy‐sinularial A (3) and 16‐hydroxy‐sinulariol C (4), along with four related known compounds (5–8), were isolated from the Hainan soft coral Lobophytum sp. Their structures, including relative stereochemistry, were elucidated by detailed analyses of spectroscopic data and by comparison with the data reported in literature.
Synthesis and Antimicrobial Studies of Novel Billogical Heterocycles
Authors: PATEL Navin B. , RATHOD Rahul D. 
Published: December 2008

AbstractThe synthetic route of sildenafil promoted us to synthesize new object molecules. New analogues containing a 4‐thiazolidinone ring bonded to the phenyl moiety at the 2‐position, 7‐(substituted anilino)‐6‐fluoro‐2‐(p‐meth‐ oxy‐m‐{[2‐(p‐hydroxyphenyl)‐4‐oxo‐1,3‐thiazolidin‐3‐yl]aminocarbonyl}phenylsulfonamido)benzothiazoles (4a–4l) have been synthesized by cyclization with thioglycollic acid of Schiff bases 3a–3l from corresponding 7‐(substituted anilino)‐6‐fluoro‐2‐(p‐methoxy‐m‐hydrazinocarbonyl phenylsulfonamido)benzothiazoles (2a–2l). Compounds 2a–2l in turn were prepared by dehydroxyhalogenation followed by condensation with hydrazine hydrates of acids 1a–1l. Compounds 1a–1l in turn were prepared by chlorosulfonation of o‐methoxy benzoic acid followed by condensation with 6‐fluoro‐7‐(substituted anilino)‐2‐aminobenzothiazoles. Final compounds have been characterized by their elemental analysis, IR, NMR and mass spectra. All the synthesized compounds have been screened for their antimicrobial activities. Some of them showed good activities.
Reusable and Ligand‐Free Palladium‐Catalyzed Suzuki‐Miyaura Cross‐Couplings of Aryl Halides with Arylboronic Acids in Tetra‐n‐butylammonium Bromide
Authors: XIE Ye‐Xiang , WANG Jian , LI Jin‐Heng , LIANG Yun 
Published: December 2008

AbstractLigand‐free and reusable palladium‐catalyzed Suzuki‐Miyaura cross‐coupling reaction performed in TBAB (tetra‐n‐butylammonium bromide) was presented. It was found that the amount of water affected these reactions. Excellent results were obtained when there was w=1% of water in TBAB. In the presence of 3 mol% of Pd(OAc)2 and 1.5 g of TBAB (containing w=1% of water), a number of aryl halides were coupled with arylboronic acids smoothly in moderate to excellent yields. Moreover, the Pd(OAc)2/TBAB system among the couplings of aryl bromides and activated chlorides could be recovered and reused three times without a loss of catalytic efficiency.
Simple Lanthanide Amides [(Me3Si)2N]3Ln(µ‐Cl)Li(THF)3 as Highly Efficient Catalysts for the Nitroaldol Reaction
Authors: LIU Yu‐Yu , WANG Shao‐Wu , ZHANG Li‐Jun , WU Yun‐Jun , LI Qing‐Hai , YANG Gao‐Sheng , XIE Mei‐Hua 
Published: December 2008

AbstractThis contribution is to report the application of simple lanthanide amides [(Me3Si)2N]3Ln(µ‐Cl)Li(THF)3 exhibiting a high activity toward catalyzing Henry reaction of aromatic aldehydes with nitroalkanes to give β‐nitroalcohols or β‐nitroolefins with a very good chemoselectivity by controlling the reaction temperatures and by selecting aromatic aldehydes. It was found that this catalytic system was compatible with a wide range of substrates of aldehydes.
Flame Retardant and Smoke Suppressant of Fe‐Organophilic Montmorillonite in Polyvinyl Chloride Nanocomposites
Authors: KONG Qing‐Hong , ZHANG Jun‐Hao , MA Jing‐Jun , YI Cheng‐Wu , LI Fu‐Cai , LIU He , LU Wei‐Liang 
Published: December 2008

AbstractTwo kinds of polyvinyl chloride (PVC)/organophilic montmorillonite (OMT) nanocomposites are prepared by a melt intercalation method. This study has been designed to determine if the presence of iron and zinc ions in the structure of montmorillonite (MMT) lattice can affect thermal, flame retardant and smoke suppressant properties. The information about the morphological structure of PVC/OMT nanocomposites was obtained using X‐ray diffraction and transmission electron microscopy. The thermal and flame retardant properties of the nanocomposites were characterized by thermogravimetric analysis, limiting oxygen index and smoke density. The nanocomposites based on Fe‐OMT exhibit better thermal, flame retardant properties and lower degradation degree than those of pure PVC. The degradation mechanism was studied by pyrolysis, gas chromatography and mass spectrometry (Py‐GC‐MS).
Surface Modification by Compositionally Modulated Multilayered Zn‐Fe Alloy Coatings
Authors: THANGARAJ V. , RAVISHANKAR K. , CHITHARANJAN HEGDE A. 
Published: December 2008

AbstractCompositionally modulated multilayered alloy (CMMA) coatings of Zn‐Fe were developed from acid chloride baths by single bath technique. The production and properties of CMMA Zn‐Fe coatings were tailored as a function of switching cathode current densities (SCCD's) and thickness of individual layers. Corrosion rates (CR) were measured by electrochemical methods. Corrosion resistances were found to vary with SCCD's and the number of sub layers in the deposit. SCCD's were optimized for production of Zn‐Fe CMMA electroplates showing peak performance against corrosion. The formation of discrete Zn‐Fe alloy layers having different compositions in the deposits were demonstrated by scanning electron microscopy (SEM). Improvements in the corrosion resistance of multilayered alloys are due to the inherent barrier properties of CMMA coatings as evidenced by electrochemical impedance spectroscopy (EIS). Corrosion resistance afforded by Zn‐Fe CMMA coatings are explained in terms of the n‐type semiconductor films at the interface, supported by Mott‐Schottky's plot. It was observed that the alloy with high w(Fe) on the top showed better corrosion resistance compared to that with the less w(Fe) on top. At optimum SCCD's of 3.0–5.5 A·dm−2, a Zn‐Fe CMMA coatings with 600 sub layers showed ca. 45 times better corrosion resistance than conventional Zn‐Fe alloy of the same thickness. The deposit showed no red rust even up to 1130 h in salt spray test.
Fabrication of Tubular Structure Agglomerates of Calcium Carbonate by Using Collodion Film
Authors: YAN Bian‐Qing , NAN Zhao‐Dong , LIU Yan 
Published: December 2008

AbstractA novel and simple method for preparing tubular structure agglomerates of calcium carbonate (CC‐tube) is described. Calcium chloride and sodium carbonate aqueous solutions were used as reactants separated by a collodion film (a nitrocellulose material) in aqueous solution. The effects of the concentrations of calcium chloride and sodium carbonate aqueous solutions on the morphology and phase structure of the as‐obtained samples were investigated. The CC‐tube growth was prevented with the increase of reactant concentration from 0.5 to 1.0 mol·L−1. Compared with Na2CO3 aqueous solution, it is favourable to grow calcite crystals in CaCl2 aqueous solution. The products were characterized by X‐ray diffraction, Fourier transform infrared spectroscopy and scanning electron‐ microscopy.
Structure and Stability of C20H3 Radical
Authors: REN Jie , ZHANG Cong‐Jie , WU Hai‐Shun 
Published: December 2008

AbstractDensity functional theory B3LYP with 6‐31G∗︁ basis set has been used to investigate the geometries, rotational constants, dipole moments, energy gaps and vibrational frequencies of nine series of isomers of C20H3 radical. The result shows that the bowl‐like structure with C1 symmetry is the most stable structure, in which the three hydrogen atoms locate on the edge carbon atoms, and the two hydrogen atoms are neighbouring and the other one has a two‐ carbon atom interval to the neighbouring hydrogen. In addition, the relationship between the energy and the position of one hydrogen atom from end to middle on the linear structures of C20H3 radical with two hydrogens atoms located on two ends was obtained, which shows the energy increase monotonously. Furthermore, hydrogenation can relax the strain and make the isomer of C20 more stable.
The actin‐binding domain of cortactin is dynamic and unstructured and affects lateral and longitudinal contacts in F‐actin
Authors: Shvetsov Alexander , Berkane Emir , Chereau David , Dominguez Roberto , Reisler Emil 
Published: December 2008

AbstractCortactin is an F‐actin‐ and Arp2/3 complex‐binding protein, implicated in the regulation of cytoskeleton dynamics and cortical actin‐assembly. The actin‐binding domain of cortactin consists of a 6.5 tandem repeat of a 37‐amino acid sequence known as the cortactin repeat (residues 80–325). Using a combination of structure prediction, circular dichroism, and cysteine crosslinking, we tested a recently published three‐dimensional model of the cortactin molecule in which the cortactin repeat is folded as a globular helical domain [Zhang et al., 2007, Mol Cell 27:197–213]. We show that the cortactin repeat is unstructured in solution. Thus, wild type and mutant constructs of the cortactin repeat, containing pairs of cysteines at positions 112 and 246, 83 and 112, 83 and 246, and 83 and 306, could be readily crosslinked with reagents of varying lengths (0–9.6 Å). Using yeast actin cysteine mutants, we also show that cortactin inhibits disulfide and dibromobimane crosslinking across the lateral and longitudinal interfaces of actin subunits in the filament, suggesting a weakening of intersubunits contacts. Our results are in disagreement with the proposed model of the cortactin molecule and have important implications for our understanding of cortactin regulation of cytoskeleton dynamics. Cell Motil. Cytoskeleton 2009. © 2008 Wiley‐Liss, Inc.
Structural Modifications of DAPY Analogues with Potent Anti‐HIV‐1 Activity
Authors: Feng Xiao‐Qing , Liang Yong‐Hong , Zeng Zhao‐Sen , Chen Fen‐Er , Balzarini Jan , Pannecouque Christophe , De Clercq Erik 
Published: December 2008

AbstractA novel series of diarylpyrimidine analogues (DAPYs) featuring a naphthyl moiety at the C4 position were designed, with all compounds exhibiting strong activity against wild‐type HIV‐1.magnified imageA novel series of diarylpyrimidine analogues (DAPYs) featuring a naphthyl moiety at the C4 position were synthesized and evaluated for their in vitro activity against HIV in MT‐4 cells. All compounds exhibited strong activity against wild‐type HIV‐1. The most active compound showed activity against wild‐type HIV‐1 with an EC50 value of 2.35 nM and against the double mutant strain (K103N+Y181C) with an EC50 value of 6.6 μM, with a selectivity index greater than 60 000 against wild‐type HIV‐1. Additionally, some compounds also showed activity against HIV‐2 (EC50=5.82 μM).