bluuebunny/crossref_metadata_2025_split huggingface dataset:
Three‐Step Synthesis of Sialic Acids and Derivatives.
Authors: Hong Zhangyong , Liu Lei , Hsu Che‐Chang , Wong Chi‐Huey 
Published: March 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 Zwitterionic Alkaloid, Containing a Rare Cyclopentadienyl Anion Unit, from the Stem Barks of Daphniphyllum macropodum MIQ.
Authors: Gan Xian‐Wen , Bai Hai‐Yun , Chen Qi‐Gang , Ma Lei , Hu Li‐Hong 
Published: March 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 Oligonucleotides Containing an O6‐G‐Alkyl‐O6‐G Interstrand Cross‐Link.
Authors: Wilds Christopher J. , Booth Jason D. , Noronha Anne M. 
Published: March 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 and anti‐HIV Activity of Novel Cyclopentenyl Nucleoside Analogues of 8‐Azapurine.
Authors: Canoa Pilar , Gonzalez‐Moa Maria J. , Teijeira Marta , Teran Carmen , Uriarte Eugenio , Pannecouque Christophe , De Clercq Erik 
Published: March 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 Synthesis of Isoflavone 7‐O‐Glucuronides.
Authors: Al‐Maharik Nawaf , Botting Nigel P. 
Published: March 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.
Marine Bacteria. Part 34. New Anthraquinones from a Marine Streptomyces sp. — Isolation, Structure Determination and Biological Activities.
Authors: Poumale Herve M. P. , Ngadjui Bonaventure T. , Helmke Elisabeth , Laatsch Hartmut 
Published: March 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 Novel and Convenient Method for the Synthesis of Ubiquinone‐10.
Authors: Wang Feng , Jiang Xiangrui , Hu Lihong , Dong Shengyi , Wu Xiumei , Bai Hua , Zhang Yongmin , Stoeckigt Joachim , Zhao Yu 
Published: March 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.
Total Synthesis of the Diazobenzofluorene Antibiotic (‐)‐Kinamycin C.
Authors: Lei Xiaoguang , Porco John A. Jr. 
Published: March 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.
Gold(I)‐Catalyzed Bis‐Spiroketalization: Synthesis of the Trioxadispiroketal‐Containing A—D Rings (II) of Azaspiracid.
Authors: Li Yongfeng , Zhou Feng , Forsyth Craig J. 
Published: March 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.
Hydrothermal Synthesis of Single‐Crystalline Antimony Telluride Nanobelts.
Authors: Shi Weidong , Yu Jiangbo , Wang Haishui , Zhang Hongjie 
Published: March 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.
Chemistry of Ru(η6‐1,3,5‐cyclooctatriene)(η2‐dimethyl Fumarate)2
Authors: Mitsudo Take‐Aki , Ura Yasuyuki , Kondo Teruyuki 
Published: March 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.
Cluster Rhenium(III) Complexes with Adamantanecarboxylic Acids: Synthesis and Properties
Authors: Golichenko A. A. , Shtemenko A. V. 
Published: March 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.
Enamine‐Based Aldol Organocatalysis in Water: Are They Really “All Wet”?
Authors: Brogan Andrew P. , Dickerson Tobin J. , Janda Kim D. 
Published: March 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 Heterocyclic Ring Systems Using Organometallic Reagents
Authors: Agarwal Sameer , Knoell Jan , Krahl Micha P. , Knoelker Hans‐Joachim 
Published: March 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.
Recent Developments in the Chemistry and Biology of Epothilones
Authors: Altmann Karl‐Heinz , Cachoux Frederic , Caravatti Giorgio , Isarno Thomas , Wartmann Markus 
Published: March 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.
Electrospray Mass Spectrometry (ESI‐MS) in the Study of Metal—Ligand Solution Equilibria
Authors: Di Marco Valerio B. , Bombi G. Giorgio 
Published: March 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.
Chirality as a tool in nucleic acid recognition: Principles and relevance in biotechnology and in medicinal chemistry
Authors: Corradini Roberto , Sforza Stefano , Tedeschi Tullia , Marchelli Rosangela 
Published: March 2007

AbstractThe understanding of the interaction of chiral species with DNA or RNA is very important for the development of new tools in biology and of new drugs. Several cases in which chirality is a crucial point in determining the DNA binding mode are reviewed and discussed, with the aim of illustrating how chirality can be considered as a tool for improving the understanding of mechanisms and the effectiveness of nucleic acid recognition. The review is divided into two parts: the former describes examples of chiral species interacting with DNA: intercalators, metal complexes, and groove binders; the latter part is dedicated to chirality in DNA analogs, with discussion of phosphate stereochemistry and chirality of ribose substitutes, in particular of peptide nucleic acids (PNAs) for which a number of works have been published recently dealing with the effect of chirality in DNA recognition. The discussion is intended to show how enantiomeric recognition originates at the molecular level, by exploiting the enormous progresses recently achieved in the field of structural characterization of complexes formed by nucleic acid with their ligands by crystallographic and spectroscopic methods. Examples of application of the DNA binding molecules described and the role of chirality in DNA recognition relevant for biotechnology or medicinal chemistry are reported. Chirality, 2007. © 2007 Wiley‐Liss, Inc.
Enantioselective and diastereoselective Michael addition of ketone/aldehyde to trans‐nitroolefins catalyzed by a novel chiral pyrrolidine‐thiourea
Authors: Shen Zongxuan , Zhang Yongqiang , Jiao Chongjun , Li Bin , Ding Juan , Zhang Yawen 
Published: March 2007

AbstractThe direct Michael addition reaction of cyclohexanone/aliphatic aldehydes with nitroolefins, catalyzed by a novel chiral pyrrolidine‐thiourea catalyst 1a, is described. The desired 1,4‐adducts were obtained in moderate yields with enantioselectivities up to 99% ee and dr up to 99:1 of the syn product. Chirality, 2007. © 2007 Wiley‐Liss, Inc.
Categorical selection of the antibody repertoire in splenic B cells
Authors: Schelonka Robert L. , Tanner Jason , Zhuang Yingxin , Gartland G. Larry , Zemlin Michael , Schroeder Harry W. 
Published: March 2007

AbstractIn the bone marrow, the passage of developing B cells through critical checkpoints of differentiation is associated with a reduction of specific categories of CDR3 of the Ig heavy chain (CDR‐H3), particularly those with excessive hydrophobic or charged amino acids and those with a length of eight or fewer residues. To gain insight into the role of CDR‐H3 content in the development of B cells in the spleen, we compared the sequences of VH7183DJCμ transcripts from sorted transitional T1, marginal zone, and follicular B cell subsets to those expressed by immature IgM+IgD– and mature IgMloIgDhi B cells in the bone marrow. Although differences in VH utilization were noted, the T1 CDR‐H3 repertoire showed extensive similarity to that of immature bone marrow B cells, and the follicular CDR‐H3 repertoire most resembled that of mature bone marrow B cells. Unlike the splenic follicular and bone marrow mature B cell CDR‐H3 repertoires, the marginal zone B cell CDR‐H3 repertoire retained both short and highly charged amino acid motifs, including those with two arginines. Our findings suggest that antigen binding sites containing specific categories of CDR‐H3 sequence content may inhibit, permit, or even facilitate passage of the host B cell through critical checkpoints in peripheral as well as central development.
Analysis of dust pollution in slate and granite transformation plants
Authors: Ordóñez Celestino , Saavedra Angeles , Taboada Javier , Alejano Leandro 
Published: March 2007

AbstractThe production of dust in natural stone transformation plants causes respiratory illnesses in workers that, over time, may seriously affect their physical health. In this article we study dust contamination in a number of ornamental slate and granite transformation plants located in Galicia, in northwest Spain. Using dust concentration measures combined with other factors that increase or decrease the noxious effects of dust (noise, duration over time, etc.), and applying multivariate and geostatistical techniques, we were able to construct dust concentration and associated environmental impact maps. The results were integrated in a GIS (Geographical Information System), which allows us to view the contamination maps, as also information on the machinery used, the associated work stations, the most contaminated areas of each plant, etc. This information was then used to analyze the problem in each plant and to compare results between plants. We propose a method designed to reduce worker exposure to dust using an individualised dust capture system at each of the work stations. The pollution control system and its characteristics were finally incorporated into the GIS to allow interested parties such as the managers of the plants studied or people interested in designing a new plant to consult the available information. © 2007 American Institute of Chemical Engineers Environ Prog, 2007.
Assessing mid‐continent area power pool capacity adequacy including transmission limitations
Authors: Chowdhury A. A. , Glover B. P. , Brusseau L. E. , Hebert S. , Jarvenpaa F. , Jensen A. , Stradley K. , Turanli H. , Haringa G. E. 
Published: March 2007

AbstractThis paper presents the results of a multi‐area generating capacity adequacy assessment performed by the Composite System Reliability Working Group (CSRWG) for the Mid‐Continent Area Power Pool's (MAPP's) United States (US) thermal system. The impact of transmission resource limitations within the MAPP region on the system reserve margin has been studied. In addition, the generating unit forced outage rate uncertainty, extreme hot summer loading conditions and the load forecast uncertainty are explicitly modelled in the study. The basic objective of this study was to determine the Reserve Capacity Obligation (RCO) for the MAPP‐US thermal system for the years 2003, 2006, 2009 and 2012. Similar studies have been performed in 1991 and 1994, and one of the purposes of this study was to determine whether or not the recommendations from the previous studies were still valid. The results of the study confirmed the current RCO level for the MAPP‐US thermal system. Copyright © 2007 John Wiley & Sons, Ltd.
Acute oral toxicity of colchicine in rats: effects of gender, vehicle matrix and pre‐exposure to lipopolysaccharide
Authors: Wiesenfeld Paddy L. , Garthoff Larry H. , Sobotka Thomas J. , Suagee Jessica K. , Barton Curtis N. 
Published: March 2007

AbstractThe oral toxicity of a single administration by gavage (10, 20 or 30 mg kg−1 body weight) of colchicine (COL) was determined in young, mature male and female Sprague‐Dawley rats. The effect of COL was evaluated in the presence or absence of additional treatment variables that included vehicle and lipopolysaccharide (LPS) pre‐exposure. The vehicle for COL was either Half and Half cream (H & H) or saline, and each group included pretreatment with either saline or a low, minimally toxic dose (83 µg kg−1 body weight) of LPS. Colchicine toxicity in both male and female age‐matched rats was characterized by progressively more severe dose‐related clinical signs of toxicity. These included mortality, decreased body weight and feed intake during the first several days after dosing, with recovery thereafter in surviving animals. There were differences in the severity of the toxic response to COL between male and female rats. The most notable sex‐related difference was in COL lethality. Female rats were two times more susceptible to the lethal effects of COL than male rats. Saline or H & H delivery vehicles did not result in any apparent qualitative or quantitative differences in COL toxicity. LPS pretreatment significantly potentiated COL lethality in both males and females, although the potentiation in males was greater than in females. LPS pretreatment modestly increased the COL induced anorexic effect in surviving males, but not in surviving female animals. LPS did not appear to modulate either the body weights or clinical signs of COL induced toxicity in surviving males or females. Copyright © 2007 John Wiley & Sons, Ltd.
Palladium‐nanoparticle intercalated vermiculite for selective hydrogenation of α,β‐unsaturated aldehydes
Authors: Divakar Duraiswami , Manikandan Dhanagopal , Rupa Valentine , Preethi Esther Leena , Chandrasekar Revathi , Sivakumar Thiripuranthagan 
Published: March 2007

AbstractPalladium nanoparticles were generated in the interlamellar region of swelling 2:1 type vermiculite clay using an adsorption excess isotherm. An adsorption excess isotherm was constructed for vermiculite after exchanging the exchangeable Na+ ions in the interlamellar region using a binary liquid mixture (ethanol:toluene). Based on adsorption excess isotherm, 1% w/w palladium was intercalated into the interlamellar space of vermiculite. The Pd‐intercalated vermiculite was characterized by X‐ray diffraction, transmission electron microscopy and atomic absorption spectroscopy. The 1% w/w Pd‐intercalated vermiculite was tested for its catalytic activity towards selective hydrogenation reactions involving some α,β‐unsaturated carbonyl compounds using a pulse reactor and its catalytic activity was compared with commercial 1% Pd/C. The intercalated catalyst was found to be very selective towards the desired product of unsaturated alcohols. Copyright © 2007 Society of Chemical Industry
Phytoremediation: the state of rhizosphere ‘engineering’ for accelerated rhizodegradation of xenobiotic contaminants
Authors: Dzantor E. Kudjo 
Published: March 2007

AbstractPhytoremediation has emerged as the method of choice for cleaning up a broad range of environmental contaminants. One process through which plants render some xenobiotic organic contaminants innocuous in soil involves plant–microbe interactions in which root exudates stimulate entire microbial communities, or induce specific enzymes in competent individuals to cause enhanced rhizodegradation. For some contaminants these inherent processes can be slow; however, potentials exist for their improvement through rhizosphere manipulations. Although this requires a greater understanding than currently exists with respect to plant and microbe components and interactions involved in the biodegradation of xenobiotic contaminants, improved understanding is being achieved by advances in biochemical and molecular characterization, and visualization of rhizosphere phenomena. In combination with earlier knowledge of naturally‐occurring plant–microbe interactions such as the opine concept, this new knowledge considerably improves the opportunities for manipulating rhizosphere interactions to greatly accelerate rhizodegradation for routine practical implementation in the field. Copyright © 2007 Society of Chemical Industry
Separation of scandium(III) from lanthanides(III) with room temperature ionic liquid based extraction containing Cyanex 925
Authors: Sun Xiaoqi , Wu Dongbei , Chen Ji , Li Deqian 
Published: March 2007

AbstractThe separation of Sc(III) from Y(III), La(III) and Yb(III) in [C8mim][PF6] containing Cyanex 925 has been investigated, and is reported in this paper. A cation exchange mechanism of Sc(III) in [C8mim][PF6] and Cyanex 925 is proposed by study of the influence of anionic and cationic species on the extraction. The coefficient of the equilibrium equation of Sc(III) was confirmed by slope analysis of log DSc vs log [Cyanex 925], and the loading capacity also confirmed the stoichiometry of Cyanex 925 to Sc(III) was close to 3:1. Infrared data for Cyanex 925 saturated with Sc(III) in [C8mim][PF6] indicated strong interaction between PO of Cyanex 925 and Sc(III). In addition, the relationship between log DSc and temperature showed that temperature had little influence on the extraction process, and the resulting thermodynamic parameters indicated that an exothermic process was involved. Copyright © 2007 Society of Chemical Industry
The effect of substrate on the composition of polyhydroxyalkanoates in enhanced biological phosphorus removal
Authors: Yagci Nevin , Cokgor Emine Ubay , Artan Nazik , Randall Clifford , Orhon Derin 
Published: March 2007

AbstractThis paper primarily evaluates the effect of external substrate type on the composition of polyhydroxyalkanoates in enhanced biological phosphorus removal (EBPR). Two sets of sequencing batch reactors (SBRs) are operated for this purpose, one with acetate and the other with propionate as the sole carbon source at different influent COD/phosphate ratios in the range 6.7–20 mgCOD mg−1P. Results indicate that propionate is a more efficient substrate for EBPR, enabling total phosphate removal regardless of the change in COD/phosphate ratio. Total polyhydroxyalkanoates formation of 267–291 mgCOD L−1 with a slight increase at higher influent phosphorus levels is observed for acetate experiments, and a slightly lower level of 250–280 mgCOD L−1, with a similar trend for propionate experiments. The volatile fatty acid type and composition in the influent induces a significant difference in the polyhydroxyalkanoates composition of the two sets of activated sludge sustained in corresponding SBR systems. Propionate is mostly stored as 3‐hydroxy‐2‐methylvalerate and polyhydroxyvalerate, while acetate is stored as polyhydroxybutyrate. The P uptake rate in SBRs fed with propionate is considerably higher than that in the acetate reactors. Parallel batch experiments yield different results, especially for systems fed with acetate, indicating that the enzymatic system to metabolize propionate is not rapidly established, always yielding a dominant polyhydroxybutyrate fraction in the generated polyhydroxyalkanoates regardless of the level of propionate in the feed. Copyright © 2007 Society of Chemical Industry
Inoculum strategies for Penicillium simplicissimum lipase production by solid‐state fermentation using a residue from the babassu oil industry
Authors: Gutarra Melissa L. E. , Godoy Mateus G. , Castilho Leda R. , Freire Denise M. G. 
Published: March 2007

AbstractTwo alternative inoculation strategies for lipase production by the fungus Penicillium simplicissimum were tested in solid‐state fermentation using a residue from the babassu oil industry (babassu cake). Conventional spore inoculation was compared with fungal pellets grown in liquid medium and with inocula consisting of fermented cake. Fungal pellets delayed lipase production whereas fermented cake accelerated enzyme synthesis, yielding a productivity of 0.45 U g−1 h−1, which is equivalent to the highest values obtained with conventional inocula. Therefore, a 22 factorial design was used to determine the best conditions for lipase production with fermented cake as inoculum strategy, varying the inoculum propagation time and inoculum concentration. Lipase activity and productivity reached 30 U g−1 and 0.63 U g−1 h−1, respectively, with 10% inoculum and 36 h. Thus, fermented cake inocula increased production 1.5‐fold with 10 times fewer spores than in conventional inoculation, indicating that fermented solids are an interesting alternative for inoculum development in solid‐state fermentation, mainly for large‐scale processes. Copyright © 2007 Society of Chemical Industry
A hybrid neural model (HNM) for the on‐line monitoring of lipase production by Candida rugosa
Authors: Boareto Álvaro J M , De Souza Maurício B , Valero Francisco , Valdman Belkis 
Published: March 2007

AbstractA mechanistic model was proposed by Gordillo for the representation of lipase production by Candida rugosa, with the bioreactor in batch and fed‐batch operation. However, the model was not able to represent the lipolytic activity. The objective of the present study is to propose an efficient hybrid neural‐phenomenological model (HNM) for this process. The experimental data used corresponded to fed‐batch operation with constant substrate feed rate at 2.8 × 10−7; 5.6 × 10−7 and 9.7 × 10−7 kg s−1. Artificial neural networks (ANNs) were trained to represent the aqueous and intracellular lipase activity and were further associated with a reduced version of the mechanistic model of the proposed HNM. When compared to the experimental data, the HNM exhibited higher accuracy. The HNM can be employed in process monitoring using only on‐line measurements of CO2 and substrate feed rate to infer enzyme activities and also substrate and biomass concentrations. Copyright © 2007 Society of Chemical Industry