bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simultaneous batching and scheduling of single stage batch plants with parallel units
Authors: Castro Pedro M. , Erdirik‐Dogan Muge , Grossmann Ignacio E. 
Published: November 2007

AbstractThis article deals with the optimal short‐term scheduling of single stage batch plants with sequence‐dependent changeovers together with the optimal selection of the number of batches to produce. The novelty of the article is that instead of following the traditional approach of considering one processing task per batch, all batches of the product are now aggregated into a single task. Integer variables that hold the number of batches to produce are used to characterize these aggregated tasks. Two conceptually different continuous‐time models are proposed. They rely on either multiple time grids or global precedence sequencing variables for event representation and generate a mixed integer linear program. The new formulations are compared to a traditional resource‐task network multiple time grid approach as well as to a recent bounding model with immediate precedence sequencing variables. The results for several example problems show the new multiple time grid formulation as the best overall performer. When compared to the traditional approach, one order of magnitude savings in computational effort are achieved due to the need of fewer event points to get to the global optimal solutions. © 2007 American Institute of Chemical Engineers AIChE J, 2008
Work‐related asthma in the Educational Services industry: California, Massachusetts, Michigan, and New Jersey, 1993–2000
Authors: Mazurek Jacek M. , Filios Margaret , Willis Ruth , Rosenman Kenneth D. , Reilly Mary Jo , McGreevy Katharine , Schill Donald P. , Valiante David , Pechter Elise , Davis Letitia , Flattery Jennifer , Harrison Robert 
Published: November 2007

AbstractObjectivesTo characterize work‐related asthma (WRA) cases working in the educational services industry identified by state‐based occupational disease surveillance systems.MethodsWe examined 2,995 WRA cases reported from 1993 to 2000 to four states: California, Massachusetts, Michigan, and New Jersey.ResultsA total of 265 (9%) WRA cases were employed in the educational services industry; 69% of cases were classified as new‐onset asthma and 31% as work‐aggravated asthma. New‐onset asthma cases were further classified as occupational asthma (61%) or as reactive airways dysfunction syndrome (8%). The most frequently reported occupation was teachers and teachers' aides (54%). The most frequently reported agents were indoor air pollutants (28%), unspecified mold (16%), dusts (14%), and cleaning products (7%).ConclusionsAsthma within the educational services industry is an occupational health problem. The health of school employees should also be considered when initiatives addressing asthma among schoolchildren are instituted. The identification, elimination, and/or control of respiratory hazards are important factors for the protection of staff and students alike. Am. J. Ind. Med. 51:47–59, 2008. © 2007 Wiley‐Liss, Inc.
Dupuytren's disease: Personal factors and occupational exposure
Authors: Lucas Gérard , Brichet Anne , Roquelaure Yves , Leclerc Annette , Descatha Alexis 
Published: November 2007

AbstractBackgroundThe etiology of Dupuytren's disease is unknown, and the role of occupational exposure is still debated. Our objective was to study the association between occupational exposures, personal risk factors and Dupuytren's disease.MethodsIn this cross‐sectional survey, nine occupational physicians performed clinical examinations, focused on Dupuytren's disease, of 2,406 French male civil servants employed at the Equipment Ministry in 1998 and interviewed them about medical history, leisure manual exposure and occupational biomechanical exposure to vibrations and manual work. A cumulative occupational exposure score was defined, with three levels of exposure.ResultsDupuytren's disease was diagnosed in 212 men (8.8%). The occupational exposure score was significantly higher in this group of cases than in the rest of the sample (377 (SD280) vs. 223 (SD250), respectively; P < 0.0001). Occupational exposure was associated with Dupuytren's disease (adjusted Odds Ratio = 2.20 [1.39–3.45] for the intermediate and 3.10 [1.99–4.84] for the high exposure groups), with adjustment for age, leisure physical activities, alcohol consumption (≥5 servings per day), history of diabetes, epilepsy, hand trauma, and familial history of Dupuytren's disease.ConclusionManual work exposure was associated with Dupuytren's disease after adjustment for personal risk factors. Longitudinal studies are needed to confirm these results. Am. J. Ind. Med. 51:9–15, 2008. © 2007 Wiley‐Liss, Inc.
Investigation on the development of sturdy bioactive hydrogel beads
Authors: Sangeetha K. , Emilia Abraham T. 
Published: November 2007

AbstractBiocatalytic hydrogel beads, which retain higher activity, expand, and contract with changes in pH, having biocompatibility, are developed. Composite spherical beads of chitosan having a diameter of 1–2 mm were prepared by ionic gelation using sodium tripolyphosphate (TPP). Above 3% TPP, the activity of the enzyme decreases. The mechanical strength of the chitosan–TPP beads was further improved by the addition of clay or cassava starch granules. The immobilization of protease (fungal, Aspergillus) was done with glutaraldehyde crosslinking. The chitosan–starch hydrogel beads showed significant increase in firmness and stiffness when compared with chitosan–clay beads. The swelling studies show that the particles expand at pH 1.2 and contract at pH 7.4. The activity retention of the immobilized protease was as high as 70% and exhibited a high pH and lower temperature optima than the free enzyme. Chitosan–starch hydrogel beads exhibited degradation peaks at about 90–110°C in TGA analysis. The biocatalyst beads retained 85% of the original catalytic activity even after eight cycles of repeat use. The freeze‐dried beads has good storage stability and can be used either as artificial bioreactor systems in detergent or in therapeutic formulations © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
iso‐OPDA: An Early Precursor of cis‐Jasmone in Plants?
Authors: Dąbrowska Paulina , Boland Wilhelm 
Published: November 2007

Abstractcis‐Jasmone is a highly appreciated fragrance and plant‐derived signal molecule that controls pollination, attracts parasitoids of attacking herbivores, and serves as an intra‐ and interspecific signal that controls gene expression. cis‐Jasmone is produced from linolenic acid along the jasmonic acid cascade. In addition to the conversion of jasmonic acid into cis‐jasmone, a novel pathway might exist that converts cis‐oxophytodienoic acid (OPDA), an early precursor of jasmonic acid, into iso‐OPDA. The planar iso‐OPDA is degraded by β‐oxidation to 3,7‐didehydrojasmonic acid, which yields cis‐jasmone by spontaneous decarboxylation. The degradation of iso‐OPDA to cis‐jasmone is demonstrated for many plant species and the yeast Saccharomyces cerevisiae.
How Can Rotaxanes Be Modified by Varying Functional Groups at the Axle?—A Combined Theoretical and Experimental Analysis of Thermochemistry and Electronic Effects
Authors: Spickermann Christian , Felder Thorsten , Schalley Christoph A. , Kirchner Barbara 
Published: November 2007

AbstractWe present theoretically as well as experimentally determined thermochemical data of the non‐covalent interactions in different axle‐substituted pseudorotaxanes. The overall interaction energy lies in the region of 35 kJ mol−1, independent of the substitution pattern at the axle. Because rearrangement energies of 7 and 3 kJ mol−1 are required for wheel and axle, respectively, the sum of the net interactions of individual non‐covalent bonds must exceed 10 kJ mol−1 to achieve a successful host–guest interaction. The geometrical analysis shows three hydrogen bonds, and the close inspection of the individual dipole moments as well as the individual hydrogen bonds reveals trends according to the different functional groups at the axle. The individual trends for the different hydrogen bonds almost lead to a cancellation of the substitution effects. From solvent‐effect considerations it can be predicted that the pseudorotaxane is stable in CHCl3 and CH2Cl2, whereas it would dethread in water. Comparing experimentally and theoretically calculated Gibbs free enthalpies, we find reasonable agreement if an exchange reaction of one solvent molecule instead of the direct formation reaction is considered.
Fused Tricyclic Phosphiranes—Analysis of Phosphorus Chemical Shieldings
Authors: Couzijn Erik P. A. , Ehlers Andreas W. , Slootweg J. Chris , Schakel Marius , Krill Steffen , Lutz Martin , Spek Anthony L. , Lammertsma Koop 
Published: November 2007

Abstract1,2‐Addition of transient W(CO)5‐complexed phosphinidenesexoto hexamethyl Dewar benzene affords the novel 3‐phosphatricyclo[3.2.0.02,4]hept‐6‐ene complexes. The fused tricyclic phosphiranes are obtained as both theZand the thermally less stableEisomers, the31P NMR chemical shifts of which differ by about 60 ppm. A computational investigation shows that the phosphorus pyramidalization and the presence of the γ double bond are responsible for this effect. The semiquantitative results contribute to a more systematic understanding of the structural influences on31P chemical shieldings. The congested double bond of theZisomer can be epoxidized withm‐chloroperbenzoic acid (MCPBA) to afford a fused tetracyclic P,O bis‐adduct.
New Carbon Materials: Biological Applications of Functionalized Nanodiamond Materials
Authors: Krueger Anke 
Published: November 2007

AbstractNanoscale diamond particles have become an interesting material. Due to their inertness, small size and surface structure, they are well‐suited for biological applications, such as labelling and drug delivery. Here we discuss the surface structure and functionalisation of diamond nanoparticles. Non‐covalent as well as covalent grafting of bioactive moieties is possible, and first applications of fluorescent diamond nanoparticles are described.
Enantio‐ and Diastereoselective Synthesis of Duocarmycine‐Based Prodrugs for a Selective Treatment of Cancer by Epoxide Opening
Authors: Tietze Lutz F. , Schuster Heiko J. , Hampel Sonja M. , Rühl Stephan , Pfoh Roland 
Published: November 2007

AbstractFor the enantio‐ und diastereoselective synthesis of the prodrug 2, the N‐tert‐butyloxycarbonyl‐protected amine 7 was alkylated with the enantiopure epoxide 14 to give the amide 10. A regio‐ and facial‐selective metal‐mediated cyclisation by using a cuprate led to 17 with an inversion of configuration at C10. Subsequent transformation of the hydroxy group in 17 by using the Appel procedure afforded (1S,10R)‐9 with an unusual double inversion owing to neighbouring‐group participation of the N‐tert‐butoxycarbonyl group. (1S,10R)‐9 is the key intermediate in the synthesis of the prodrug 2, which has been developed for a selective treatment of cancer based on the antibody‐directed enzyme prodrug therapy as an analogue of the natural antibiotic duocarmycine SA (1).
Surfactant‐Free Synthesis of Hyperbranched Monoclinic Bismuth Vanadate and its Applications in Photocatalysis, Gas Sensing, and Lithium‐Ion Batteries
Authors: Zhao Yu , Xie Yi , Zhu Xi , Yan Si , Wang Sunxi 
Published: November 2007

AbstractHyperbranched monoclinic BiVO4 (h‐BiVO4) has been synthesized on a large scale and with good uniformity by a surfactant‐free hydrothermal route. h‐BiVO4 consists of four trunks with branches distributed on opposite sides. From observation of the intermediates at an early stage of the reaction process, it can be seen that during formation h‐BiVO4 has different growth rates along the a, b, and c axes. Based on crystal structure analysis and experimental results, h‐BiVO4 shows preferential growth along the [100] direction, and subsequently, along the [010] and [001] directions. As‐synthesized h‐BiVO4 exhibits excellent photocatalytic ability in the photodegradation reaction of an aqueous solution of RB under visible light. Electrochemical measurements predict that h‐BiVO4 possesses high sensitivity to formaldehyde and ethanol gases, favorable discharge capacity, and capacity retention, which indicate potential applications in the fields of sensing devices and lithium‐ion batteries.
A Double Regio‐ and Stereoselective Glycosylation Strategy for the Synthesis of N‐Glycans
Authors: Unverzagt Carlo , Eller Steffen , Mezzato Stefano , Schuberth Ralf 
Published: November 2007

AbstractA building block approach for biantennary N‐linked oligosaccharides from glycoproteins (N‐glycans) has been developed. Starting from a core trisaccharide (β‐mannosyl chitobiose) containing a benzylidene‐protected β‐mannoside, the attachment of the disaccharide building blocks for the antennae can be performed in a double regio‐ and stereoselective manner. A short synthesis of a GlcNPhtβ1,2Man donor was developed. The benzylidene acetal moiety, as a minimal protection of the β‐mannoside, allows selective α‐glycosylation at OH‐3 of the 2,3‐diol with GlcNβ1,2Man trichloroacetimidate donors. Subsequent debenzylidenation leads to a 4,6‐diol, which can be selectively extended at OH‐6. Overreaction at OH‐4 was generally low when phthalimido‐protected donors were used. This general strategy represents a modular synthesis of N‐glycans and their glycoconjugates.
Polyoxometalates with Internal Cavities: Redox Activity, Basicity, and Cation Encapsulation in [Mn+P5W30O110](15‐n)‐ Preyssler Complexes, with M: Na+, Ca2+, Y3+, La3+, Ce3+, and Th4+.
Authors: Fernandez Jorge A. , Lopez Xavier , Bo Carles , de Graaf Coen , Baerends Evert J. , Poblet Josep M. 
Published: November 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.
Pressure‐Induced Phase Transitions in LiNH2.
Authors: Chellappa Raja S. , Chandra Dhanesh , Somayazulu Maddury , Gramsch Stephen A. , Hemley Russell J. 
Published: November 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.
Crystal Structure and Phonon Properties of Noncentrosymmetric LiNaB4O7.
Authors: Maczka M. , Waskowska A. , Majchrowski A. , Zmija J. , Hanuza J. , Peterson G. A. , Keszler D. A. 
Published: November 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.
Mesoporous Graphitic Carbon Nitride as a Versatile, Metal‐Free Catalyst for the Cyclization of Functional Nitriles and Alkynes.
Authors: Goettmann Frederic , Fischer Anna , Antonietti Markus , Thomas Arne 
Published: November 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.
Radical‐Mediated Cyclization Reactions Leading to Spiro and [6,6]‐Fused Heterocycles.
Authors: Majumdar K. C. , Debnath P. , Pal A. K. , Chattopadhyay S. K. , Biswas A. 
Published: November 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.
Stereospecific Cyclopropanation of Highly Substituted C—C Double Bonds Promoted by CrCl2. Stereoselective Synthesis of Cyclopropanecarboxamides and Cyclopropyl Ketones.
Authors: Concellon Jose M. , Rodriguez‐Solla Humberto , Mejica Carmen , Blanco Elena G. 
Published: November 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.
Chemoselective Synthesis of 1,1‐Diacetates from Aldehydes in the Presence of Al(HSO4)3 under Mild Solvent‐Free Conditions.
Authors: Mirjalili B. F. , Zolfigol M. A. , Bamoniri A. , Amrollahi M. A. , Sheikhan N. 
Published: November 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.
Rhenium‐Catalyzed Synthesis of Naphthalene Derivatives via Insertion of Aldehydes into a C—H Bond.
Authors: Kuninobu Yoichiro , Nishina Yuta , Takai Kazuhiko 
Published: November 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.
Catalytic Nucleophilic Activation of Acetonitrile via a Cooperative Catalysis of Cationic Ru Complex, DBU, and NaPF6.
Authors: Kumagai Naoya , Matsunaga Shigeki , Shibasaki Masakatsu 
Published: November 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.
Eco‐Friendly Oxyiodination of Aromatic Compounds Using Ammonium Iodide and Hydrogen Peroxide.
Authors: Narender N. , Reddy K. Suresh Kumar , Mohan K. V. V. Krishna , Kulkarni S. J. 
Published: November 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.
Aerobic Oxidation of Alcohol in Aqueous Solution Catalyzed by Gold.
Authors: Li Huanrong , Guan Bingtao , Wang Wenjin , Xing Dong , Fang Zhao , Wan Xiaobing , Yang Liping , Shi Zhangjie 
Published: November 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 Palladium(0)‐Catalyzed Addition of Diphenyl Disulfide to Allenes Leading to Vicinal Disulfides and Its Application to Carbonylation with Carbon Monoxide.
Authors: Kodama Shintaro , Nishinaka Etsuyo , Nomoto Akihiro , Sonoda Motohiro , Ogawa Akiya 
Published: November 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(II)‐Catalyzed Intramolecular Reactions of Methyl 4‐Diazo‐5‐oxo‐3‐trifluoromethylalk‐2‐enoates in the Presence of 2,5‐Dimethylfuran.
Authors: Zakharova V. M. , Nikolaev V. A. 
Published: November 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 Spectral Properties of Unsymmetrical Benzoporphyrins Containing Phenoxy Groups or Quinoxaline Fragments.
Authors: Galanin N. E. , Shaposhnikov G. P. 
Published: November 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 Solvent‐Free Protocol for Facile Condensation of Indoles with Carbonyl Compounds Using Silica Chloride as a New, Highly Efficient, and Mild Catalyst.
Authors: Hasaninejad Alireza , Zare Abdolkarim , Sharghi Hashem , Shekouhy Mohsen , Khalifeh Reza , Beni Alireza Salimi , Zare Ahmad Reza Moosavi 
Published: November 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.
Reductive Heterocyclizations via Indium—Iodine‐Promoted Conversion of 2‐Nitroaryl Imines or 2‐Nitroarenes to 2,3‐Diaryl‐substituted Indazoles.
Authors: Ahn Gil Hwan , Lee Jung June , Jun Young Moo , Lee Byung Min , Kim Byeong Hyo 
Published: November 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 Some New 1‐(6‐Fluorobenzothiazol‐2‐yl)‐3‐(4‐fluorophenyl)‐5‐arylpyrazolines and Their Iodine(III) Mediated Oxidation to Corresponding Pyrazoles.
Authors: Aggarwal Ranjana , Kumar Vinod , Singh Shiv P. 
Published: November 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.
Manganese‐Catalyzed Insertion of Aldehydes into a C—H Bond.
Authors: Kuninobu Yoichiro , Nishina Yuta , Takeuchi Takahiro , Takai Kazuhiko 
Published: November 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.
Asymmetric Lewis Acid Catalyzed Addition of Isocyanides to Aldehydes — Synthesis of 5‐Amino‐2‐(1‐hydroxyalkyl)oxazoles.
Authors: Wang Shixin , Wang Mei‐Xiang , Wang De‐Xian , Zhu Jieping 
Published: November 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 Antimicrobial Evaluation of Some New 3‐Alkyl‐, 3‐(2′‐Naphthyl)isocoumarins and Their (dl)‐3,4‐Dihydroderivatives.
Authors: Khan Zulfiqar Ali , Rama Nasim Hasan , Hussain Muhammad Tahir , Khan Gul Shahzada 
Published: November 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.
Chiral Amine Thiourea‐Promoted Enantioselective Domino Michael‐Aldol Reactions Between 2‐Mercaptobenzaldehydes and Maleimides.
Authors: Zu Liansuo , Xie Hexin , Li Hao , Wang Jian , Jiang Wei , Wang Wei 
Published: November 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.
Reaction of 2‐Chloro‐6‐hydroxy‐5,5‐dimethyl‐5,6‐dihydro‐1H‐pyridine‐3,4,4‐tricarboni triles with Methanol
Authors: Eremkin A. V. , Ershov O. V. , Mol'kov S. N. , Kayukov Ya. S. , Nasakin O. E. , Tafeenko V. A. 
Published: November 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 General Modular Method of Azaindole and Thienopyrrole Synthesis via Pd‐Catalyzed Tandem Couplings of gem‐Dichloroolefins.
Authors: Fang Yuan‐Qing , Yuen Josephine , Lautens Mark 
Published: November 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.
Selectivity Enhancement of Silica‐Supported Sulfonic Acid Catalysts in Water by Coating of Ionic Liquid.
Authors: Gu Yanlong , Karam Ayman , Jerome Francois , Barrault Joel 
Published: November 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.