bluuebunny/crossref_metadata_2025 huggingface dataset:
Toxicity and degradability of nitrophenols in anaerobic systems
Authors: Uberoi Vikas , Bhattacharya Sanjoy K.
Published: October 2006

Nitrophenols are among the most important and versatile industrial organic compounds and are widely used in the chemical industry and are listed as priority pollutants by the U.S. EPA. The toxic effects and degradability of three selected nitrophenols (2‐nitrophenol, 4‐nitrophenol and 2,4‐dinitrophenol) in anaerobic acetate and propionate enrichment systems were studied using batch serum bottles. The toxicity to both propionate‐ and acetate‐fed systems decreased in the following order: 2,4‐dinitrophenol > 4‐nitrophenol > 2‐nitrophenol. An up‐flow fixed film, acetate‐fed reactor was able to acclimate to 20 mg/L of 2‐ and 4‐nitrophenol showing a 95% removal of each nitrophenol. The effect of biomass was studied using serum bottles for anaerobic toxicity assays with the design volatile suspended solids (VSS) concentrations of 500, 1000, and 1500 mg/L. With higher VSS the toxic effects of nitrophenols on methanogenesis were less severe. Nitrophenols were more inhibitory to acetate utilization than propionate utilization. Under anaerobic conditions, 2‐nitrophenol and 2,4‐dinitrophenol were transformed both abiotically and biotically to 2‐aminophenol and 2‐amino,4‐nitrophenol, respectively. The presence of propionate in propionate enrichment culture enhanced the removal rates of all three nitrophenols studied.
Removal of ammonia from coke‐plant wastewater by using synthetic zeolite
Authors: Singh Gurdeep , Prasad Bably
Published: October 2006

Ammonia is discharged at significant concentrations in coke‐plant effluents and can adversely impact freshwater‐receiving streams. This article reports on the removal of ammonia from such wastewaters by using synthetic zeolites. Factors affecting the ammonium exchange capacity included the contact time, the concentration of ammonia in the solution, the particle size of the zeolites, the loading flow rates, and the number of regenerations of zeolite. The 13× molecular sieve has also been tested for its capacity to remove ammonia from coke‐plant secondary wastewater. Results indicate that the ammonium adsorption rate increases with an increase in the contact time of zeolite with ammonia solution. Smaller particle size of the zeolite, increase in ammonium concentration, and lower loading flow rate elevate ammonium exchange capacity for the zeolite. Regeneration of the zeolite with NaCl solution reactivates the zeolite column, and repeated column regeneration is possible without loss of ammonium uptake capacity.
A gas chromatographic‐based headspace biochemical oxygen demand test
Authors: Logan Bruce E. , Patnaik Rabindranath
Published: October 2006

The 5‐day biochemical oxygen demand (BOD5) test is an established tool for measuring the concentration of biodegradable organic matter in wastewater effluents. Unfortunately, the BOD test is time consuming, labor intensive, and, due to the dilution of the wastewater, takes a relatively long time to complete. A few years ago a headspace BOD (HBOD) test was developed that avoided the need to dilute wastewater samples. A disadvantage of the original HBOD test was that the sample had to be transferred from the HBOD tube to another vessel for a dissolved oxygen measurement. This study demonstrates that it is possible to conduct HBOD tests using a gas chromatograph to measure oxygen utilization in the sealed tube and that a 3‐day HBOD provides a reliable estimate of the BOD5. The HBOD3 values measured for primary and secondary clarifier effluents from an activated sludge plant were 114 and 23 mg/L; BOD5 measurements were 116 and 24 mg/L. Changes in headspace volumes did not significantly change the HBODs. Secondary settled wastewater had a HBOD5 of 83 ± 3 mg/L (mean ± SD) for headspace volumes of 10–20 mL (36–71%) in a 28‐mL tube. The HBOD5 was also constant (84 ± 6 mg/L) when samples were diluted 20–60% using BOD dilution water at a fixed headspace volume of 8 mL in HBOD tubes. Nitrification increased the HBOD of nondiluted wastewaters after 4 days, although nitrification appeared to be sufficiently inhibited using a standard nitrification inhibitor. A calibration test for the HBOD was developed using a 300‐mg/L glucose and glutamic acid (GGA, 50% each) solution and secondary clarifier wastewater that provided HBOD3 values similar to those obtained in the analogous BOD5 test. It is argued that the simpler procedures, added precision of GC‐based protocols, and more rapid exertion of oxygen demand make the HBOD test superior to the conventional BOD test.
The effect of cations on the settling and dewatering of activated sludges: Laboratory results
Authors: Higgins Matthew J. , Novak John T.
Published: October 2006

The effect of cations on the settling and dewatering of activated sludge was investigated using laboratory scale activated sludge reactors. Three parameters were investigated: the effect of the calcium to magnesium ratio; the effect of increasing divalent cation concentrations; and the effect of increasing monovalent cation concentrations. The study showed that the settling and dewatering properties of the activated sludge were dependent on both the concentrations and ratios of cations in the feed. Some activated sludge systems required both calcium and magnesium in the feed while others only required one of these cations for good settling and dewatering properties. A minimum of 0.7–2.0 meq/L each of calcium and magnesium was necessary for acceptable settling and dewatering. Increasing the feed concentrations of calcium and magnesium above this level improved floc strength, settling and dewatering properties and increased the bound protein concentration. The poor settling and dewatering of suspensions receiving low divalent cation concentrations in the feed could also be improved by batch addition of calcium and/or magnesium. However, improvements were greater when an equal concentration of the cation was added to the feed. Addition of the monovalent cation, sodium, to the feed resulted in a deterioration in settling and dewatering properties when the monovalent to divalent cation ratio exceeded approximately 2 to 1, expressed on an equivalent basis. However, the deterioration could be reversed by increasing the calcium and magnesium concentration in the feed which reduced the monovalent to divalent cation ratio below 2 to 1.
Performance of a continuous stirred tank reactor with immobilized denitrifiers and methanogens
Authors: Chen Kuo‐Cheng , Lin Ying‐Feng , Houng Jer‐Yiing
Published: October 2006

Water denitrification by a coimmobilized mixed culture of denitrifiers and methanogens to simultaneously remove nitrate and excessive carbon source, methanol, in a continuous stirred tank reactor was investigated. Complete denitrification occurred at a methanol to nitrate nitrogen (M:N) ratio of ≥2.62. Ratios beyond 2.62 methane formation took place resulting in the depletion of excess methanol. The quality of the effluent solution was found to be markedly dependent on nitrate loading. At a constant M:N ratio ∼3.2, a complete nitrate and methanol removal could be attained when the influent nitrate concentration was <385 mg N/L; otherwise, the hydraulic retention time (HRT) was operated >2 hr (at a constant influent nitrate around 100 mg N/L). The surplus methanol was verified to be converted directly into methane when complete denitrification was achieved. Moreover, a sufficient correlation was found between the biological activity and the redox potential.
Electrophoretic evidence of esterase inhibition in larval caddisflies exposed to inorganic mercury
Authors: Benton Michael J. , Guttman Sheldon I.
Published: October 2006

In an previous 72‐hr mercury bioassay with the larval caddisfly Nectopsyche albida, electrophoretically detectable esterase activity was absent in exposed individuals that succumbed to mercury toxicity, while nine other enzymes remained active hours after death. Esterase activity also persisted in unexposed individuals (Benton and Guttman, 1992a, b). To test the effects of mercury exposure duration on esterase activity, additional larval N. albida were exposed under conditions identical to those in the earlier bioassay, and esterase activity in live individuals was tested electrophoretically every 12 hr. To test the effects of mercury concentration on esterase activity, unexposed N. albida larvae were electrophoresed, and the esterase‐specific stain was spiked with various concentrations of mercury. Electrophoretic banding patterns were then densitometrically quantified to identify changes in esterase activity with exposure duration and mercury concentration. Results suggest that: inorganic mercury inhibited esterase activity in N. albida, inhibition increased with exposure duration, and inhibition increased with mercury concentration.
Selective separation of europium using polymer‐enhanced ultrafiltration
Authors: Norton Michael V. , DiGiano Francis A. , Hallen Richard T.
Published: October 2006

The U.S. Department of Energy (DOE) is actively pursuing new and improved separation techniques for the cleanup of past nuclear defense production sites. Research and production activities at DOE's Hanford Site in Richland, Wash., have created large volumes of waste streams containing hazardous and toxic chemicals along with radioactive materials. Many of these wastes will require processing for segregation into high‐level, transuranic, and/or low‐level waste for permanent disposal. A process to selectively remove actinides, such as americium, from liquid radioactive waste was investigated for potential use at Hanford and other contaminated DOE sites. The objective of this research was to determine the effectiveness of polymer binding followed by ultrafiltration for removal of europium (Eu), a nonradioactive surrogate for trivalent actinides such as americium. A commercially available polyacrylic acid (PAA) and a Pacific Northwest Laboratory (PNL) synthesized copolymer were tested. Both polymers significantly increased Eu removal. A cation exchange mechanism was implied by examination of the Eu‐to‐RCO2− functional groups that comprise the acrylic acid monomer. The weight ratios of Eu‐to‐polymer needed to achieve 85% rejection of Eu were 1:6 for PAA and 1:10 for the PNL copolymer. Addition of sodium to the feed solution at a concentration three orders of magnitude greater than Eu did not adversely affect rejection of Eu; this showed the high selectivity of both polymers for Eu. Polymer binding of metals followed by ultrafiltration also has potential applications for selective separation of metals from various industrial process streams. The formation of metal hydroxide precipitates is also a possibility unless pH is controlled; these could be separated as well by ultrafiltration but defeat the intent of polymer addition. For the polymers tested, pH had to be above the pKa (4.25) of the ionizing functional groups but below a pH of 6 where precipitation may interfere.
Cyclopropanation of Enantiopure Metal Alkenyl Carbenes with 2‐Methoxyfuran: A Practical Route to Carboxycyclopropylglycine Precursors
Authors: Barluenga José , de Prado Ana , Santamaría Javier , Tomás Miguel
Published: October 2006

We have examined the reactivity of enantiopure alkenyl Fischer carbene complexes 1, readily available from the chiral pool, with 2‐methoxyfuran 4. In this reaction, polyfunctionalised cyclopropylcarbenes 5 are obtained under very mild conditions and with high selectivity, the major stereoisomer being isolated in an enantiopure form. The reaction involves the conjugate nucleophilic addition of 2‐methoxyfuran 4 to the carbene complexes 1 followed by ring closure of the resulting zwitterionic intermediate species. The oxidation of the carbene 5 a results in the formation of the enantiopure cyclopropane diester 6. Further elaboration of the cyclopropane 6 allows for an efficient enantioselective access to alcohols or diols 7–9 as well as to cyclopropanecarbaldehydes 10–12. The protocol described herein provides a very simple entry to interesting enantiopure precursors of carboxycyclopropylglycine derivatives from readily available starting materials. In order to test this potential as carboxycyclopropylglycine precursors, the aminocyanation of the cyclopropanecarbaldehyde 10 was undertaken and the α‐aminocyano derivative 13 was isolated as a single diastereosiomer.
Li26 Clusters in the Compound Li13Na29Ba19.
Authors: Smetana Volodymyr , Babizhetskyy Volodymyr , Vajenine Grigori V. , Simon Arndt
Published: October 2006

ChemInform 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.
Ba4Ga2B8O18Cl2 ×NaCl: A New Polar Structure with NaCl Inclusion.
Authors: Li R. K. , Yu Yi
Published: October 2006

ChemInform 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.
(C5H16N2)× [Zn3(HPO3)4]×H2O: A New Three‐Dimensional Zincophosphite with 12‐Membered Ring Channels and Infinite Edge Shared 4‐Membered Ring Ladders.
Authors: Wang Lei , Ding Hong , Hou Ying , Zhu Linlin , Shi Zhan , Feng Shouhua
Published: October 2006

ChemInform 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 MNbO3 Nanoparticles (M: Li, Na, K).
Authors: Wohlrab Sebastian , Weiss Margarita , Du Hongchu , Kaskel Stefan
Published: October 2006

ChemInform 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, Characterization and Properties of Two Novel Complexes Based on 2‐Aminopyridine and Polyoxometalates.
Authors: Gong Yun , Li Yang‐Guang , Li Hui , Wang Yong‐Hui , Hu Chang‐Wen
Published: October 2006

ChemInform 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 Hexanuclear Iodoargentate(I) Cluster of the Coplanar Dicubane‐Like Type: Structure and Nonlinear Optical (NLO) Properties of {[(t‐Bu)4N]2 [Ag6I8]}n.
Authors: Li Y. , Zhang Z. X. , Li K. C. , Song W. D. , Huang F. , Li S. D. , Li X. W. , Xu J. Q. , Pan L. Y.
Published: October 2006

ChemInform 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.
Actinide‐Transition Metal Heteronuclear Ions and Their Oxides: {IrUO}+ as an Analogue to Uranyl.
Authors: Santos Marta , Marcalo Joaquim , Pieres de Matos Antonio , Gibson John K. , Haire Richard G.
Published: October 2006

ChemInform 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.
Ring‐Opening of Tertiary Cyclopropanols Derived from β‐Diketones.
Authors: Li Le‐Zhen , Xiao Bin , Guo Qing‐Xiang , Xue Song
Published: October 2006

ChemInform 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.
Mild Manganese(III) Acetate Catalyzed Allylic Oxidation: Application to Simple and Complex Alkenes.
Authors: Shing Tony K. M. , Yeung Ying‐Yeung , Su Pak L.
Published: October 2006

ChemInform 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.
Solvent‐Free Reduction of Aldehydes and Ketones Using Solid Acid‐Activated Sodium Borohydride.
Authors: Cho Byung Tae , Kang Sang Kyu , Kim Min Sung , Ryu Soo Ryeon , An Duk Keun
Published: October 2006

ChemInform 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.
Pd/C‐Catalyzed Chemoselective Hydrogenation in the Presence of Diphenylsulfide.
Authors: Mori Akinori , Miyakawa Yumi , Ohashi Eri , Haga Tomoko , Maegawa Tomohiro , Sajiki Hironao
Published: October 2006

ChemInform 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.
Novel Methodologies. Part 92. A Simple, Efficient and Highly Selective Deprotection of t‐Butyldimethylsilyl (TBDMS) Ethers Using Silica Supported Sodium Hydrogen Sulfate as a Heterogeneous Catalyst.
Authors: Das Biswanath , Reddy K. Ravinder , Thirupathi P.
Published: October 2006

ChemInform 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.
Diastereoselective Synthesis of α‐Oxyamines via Gold‐, Silver‐ and Copper‐Catalyzed, Three‐Component Couplings of α‐Oxyaldehydes, Alkynes, and Amines in Water.
Authors: Huang Baosheng , Yao Xiaoquan , Li Chao‐Jun
Published: October 2006

ChemInform 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.
One‐Pot Synthesis of N‐Protected α‐Amino Aldehyde Acetals from Three‐Component Reaction of Fluoroalkanesulfonyl Azide, Vinyl Ether and Alcohol.
Authors: Qin Chaoyue , He Ping , Zhu Shizheng , Cao Song
Published: October 2006

ChemInform 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 Difluorocarbene with Anions from Amides and Oximes: Synthesis of N‐Difluoromethyl Substituted Amides, O‐Difluoromethylimidates or O‐Difluoromethyl Substituted Oximes under Phase‐Transfer Catalysis Conditions.
Authors: Nawrot Ewelina , Jonczyk Andrzej
Published: October 2006

ChemInform 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.
CuI/L‐Proline‐Catalyzed Coupling Reactions of Vinyl Bromides with Activated Methylene Compounds.
Authors: Pei Lin , Qian Weixing
Published: October 2006

ChemInform 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.
C2 Symmetric Chiral N‐Heterocyclic Carbene Catalyst for Asymmetric Intramolecular Stetter Reaction.
Authors: Matsumoto Yasumasa , Tomioka Kiyoshi
Published: October 2006

ChemInform 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.
One‐Pot Fluoro‐de‐diazoniation of Anilines in Organic Medium.
Authors: Garel Laurent , Saint‐Jalmes Laurent
Published: October 2006

ChemInform 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.
Selective One‐Pot Synthesis of (Z)‐Iodoallylic Iodides from Propargyl Alcohols.
Authors: Manickam Govindaswamy , Siddappa Umesh , Li Yong
Published: October 2006

ChemInform 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.
Stereoselective Synthesis of 1‐Bromo‐1‐fluorostyrenes
Authors: Shastin Aleksey V. , Muzalevsky Vasiliy M. , Balenkova Elizabeth S. , Nenajdenko Valentine G.
Published: October 2006

ChemInform 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.
Palladium‐Catalyzed Oxidation of Boc‐Protected N‐Methylamines with IOAc as the Oxidant: A Boc‐Directed sp3 C—H Bond Activation.
Authors: Wang Dong‐Hui , Hao Xue‐Shi , Wu Di‐Fu , Yu Jin‐Quan
Published: October 2006

ChemInform 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.
Three‐Step Synthesis of Highly Substituted Phenols from 1,3‐Dinitropropanes.
Authors: Ballini Roberto , Barboni Luciano , Giarlo Guido , Palmieri Alessandro
Published: October 2006

ChemInform 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.
Proline‐Catalyzed Two‐Component, Three‐Component and Self‐Asymmetric Mannich Reactions Promoted by Ultrasonic Conditions.
Authors: Kantam M. Lakshmi , Rajasekhar Ch. V. , Gopikrishna G. , Reddy K. Rakender , Choudary B. M.
Published: October 2006

ChemInform 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 Green Version of the Passerini Reaction in an Ionic Liquid ([bmim][BF4]).
Authors: Fan Xuesen , Li Yanzhen , Zhang Xinying , Qu Guirong , Wang Jianji
Published: October 2006

ChemInform 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.
Indium(I) Iodide Promoted Cleavage of Dialkyl Disulfides — Application of the Michael Addition of Thiolate Anions to Conjugate Carbonyl Compounds and Regioselective Ring Opening of Epoxides.
Authors: Ranu Brindaban C. , Mandal Tanmay
Published: October 2006

ChemInform 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.
Polymer‐Supported N‐Heterocyclic Carbene—Rhodium Complex Catalyst for the Addition of Arylboronic Acids to Aldehydes.
Authors: Yan Chun , Zeng Xiaoming , Zhang Weifeng , Luo Meiming
Published: October 2006

ChemInform 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.
Use of Cheaper Metal than Rh, CHCl3‐Free Pd Catalyst, in 1,2‐Addition of Aromatic Aldehydes with Arylboronic Acids.
Authors: Suzuki Kiyoto , Arao Takafumi , Ishii Satoru , Maeda Yuka , Kondo Kazuhiro , Aoyama Toyohiko
Published: October 2006

ChemInform 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, Electrochemical Properties, and Thermal Transformations of 1‐(5‐Nitropyrimidin‐2‐yl)[60]fullereno[1,2‐b]aziridine.
Authors: Romanova I. P. , Yusupova G. G. , Larionova O. A. , Balandina A. A. , Latypov Sh. K. , Zverev V. V. , Yakhvarov D. G. , Rusinov. G. L. Rusinov. G. L. , Sinyashin O. G.
Published: October 2006

ChemInform 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.
γ‐Heteroatom Directed Stereocontrolled Staudinger Cycloaddition Reaction of Vinylketenes and Imines.
Authors: Shaikh Aarif L. , Puranik Vedavati G. , Deshmukh A. R. A. S.
Published: October 2006

ChemInform 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.
anti‐HIV Activity of Stilbene‐Related Heterocyclic Compounds.
Authors: Alcami Jose , et al. et al.
Published: October 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
An Efficient Method to Synthesize Benzofurans and Naphthofurans.
Authors: Pan Chongfeng , Yu Jie , Zhou Yuqing , Wang Zhiyong , Zhou Ming‐Ming
Published: October 2006

ChemInform 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.
Stereoselective Crossed‐Aldol Condensation of 3‐Acetyl‐2,5‐dimethylthiophene/Furan with Aromatic Aldehydes in Water: Synthesis of (2E)‐3‐Aryl‐1‐(thien‐3‐yl/fur‐3‐yl)‐prop‐2‐en‐1‐ones.
Authors: Hassan Mohamed A. , Batterjee Suzan , Taib Layla A.
Published: October 2006

ChemInform 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.
Aminotroponate Zinc Complexes as Catalysts for the Intramolecular Hydroamination of Alkenes and Alkynes.
Authors: Meyer Nils , Loehnwitz Karolin , Zulys Agustino , Roesky Peter W. , Dochnahl Maximilian , Blechert Siegfried
Published: October 2006

ChemInform 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 Simple, Highly Regioselective and Efficient Reaction of Indole with Epoxides under Solvent‐Free Conditions.
Authors: Azizi Najmedin , Mehrazma Shokopheh , Saidi Mohammad R.
Published: October 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The Design and Synthesis of a Tricyclic Single‐Nitrogen Scaffold that Serves as a 5‐HT2c Receptor Agonist
Authors: Huck Bayard R. , et al. et al.
Published: October 2006

ChemInform 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.
Novel Azolinium/Rhodium System Catalyzed Addition of Arylboronic Acids to Aldehydes.
Authors: Oezdemir Ismail , Yigit Murat , Cetinkaya Engin , Cetinkaya Bekir
Published: October 2006

ChemInform 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 Thiosemicarbazide with N‐Cyanoguanidine: Synthesis of 3,5‐Diamino‐1‐thiocarbamoyl‐ and 3,5‐Diamino‐1‐thiazol‐2‐yl‐1,2,4‐triazoles.
Authors: Chernyshev V. M. , Kosov A. E. , Gladkov E. S. , Shishkina S. V. , Taranushich V. A. , Desenko S. M. , Shishkin O. V.
Published: October 2006

ChemInform 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 Chromans by Sequential “[3 + 3]‐Cyclization/Williamson” Reactions of 1,3‐Bis(trimethylsilyloxy)‐7‐chlorohepta‐1,3‐dienes.
Authors: Nguyen Van Thi Hong , Appel Bettina , Langer Peter
Published: October 2006

ChemInform 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.
Kroehnke Pyridines: An Efficient Solvent‐Free Synthesis of 2,4,6‐Triarylpyridines.
Authors: Adib Mehdi , Tahermansouri Hasan , Koloogani Somayeh Aali , Mohammadi Bagher , Bijanzadeh Hamid Reza
Published: October 2006

ChemInform 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.
Imino Diels—Alder Reactions: An Efficient One‐Pot Synthesis of Pyrano‐ and Furanoquinoline Derivatives Catalyzed by SbCl3.
Authors: Maiti Gourhari , Kundu Pradip
Published: October 2006

ChemInform 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.
Three‐Component Condensation of Meldrum′s Acid with 2‐Naphthylamine and Esters Derived from Vanillin.
Authors: Kozlov N. G. , Basalaeva L. I.
Published: October 2006

ChemInform 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 5‐Isothiocyanato‐1,10‐phenanthroline.
Authors: Khimich N. N. , Obrezkov N. P. , Koptelova L. A.
Published: October 2006

ChemInform 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 5‐Aryl‐2,4‐diamino‐8‐hydroxy‐5H‐chromeno [2,3‐b]pyridine‐3‐carbonitriles.
Authors: Melekhin E. A. , Bardasov I. N. , Ershov O. V. , Eremkin A. V. , Kayukov Ya. S. , Nasakin O. E.
Published: October 2006

ChemInform 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.
Polyphosphoric Acid Induced Construction of Quinazolinone Skeleton from 1‐(3,4‐Dimethoxyphenyl)‐3‐phenylurea and Carboxylic Acids.
Authors: Ivanov Iliyan , Nikolova Stoyanka , Kochovska Ekaterina , Statkova‐Abeghe Stela
Published: October 2006

ChemInform 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 New Ruthenium‐Catalyzed Approach for Quinoxalines from o‐Phenylenediamines and Vicinal‐Diols.
Authors: Cho Chan Sik , Oh Sung Gi
Published: October 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
An Efficient and Diastereoselective Intramolecular 1,3‐Dipolar Cycloaddition of Cyclic Azomethine Ylides and Nitrones.
Authors: Pedrosa Rafael , Andres Celia , Nieto Javier , Perez‐Cuadrado Cristobal , San Francisco Ivan
Published: October 2006

ChemInform 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.
Reactions of Epoxides Derived from Internal Perfluoroolefins with o‐Phenylenediamine and 2‐Aminophenol.
Authors: Saloutina L. V. , Zapevalov A. Ya. , Saloutin V. I. , Kodess M. I. , Kirichenko V. E. , Pervova M. G. , Chupakhin O. N.
Published: October 2006

ChemInform 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.
2‐Allyl‐N‐benzyl Substituted α‐Naphthylamines as Building Blocks in Heterocyclic Synthesis. New and Efficient Syntheses of Benz[e]naphtho[1,2‐b]azepine and Naphtho[1,2‐b]azepine Derivatives.
Authors: Yepez Andres Felipe , Palma Alirio , Stashenko Elena , Bahsas Ali , Amaro‐Luis Juan M.
Published: October 2006

ChemInform 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.
Double‐Mannich Annulation of Cyclic Ketones Using N,N‐Bis(ethoxymethyl)alkylamine Reagents.
Authors: Halliday Jill I. , Chebib Mary , Turner Peter , McLeod Malcolm D.
Published: October 2006

ChemInform 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.
Oxazepines and Thiazepines. Part 44. Reductive Formation of 1,5‐Benzothiazepines.
Authors: Levai Albert , Toth Gabor , Gondos Timea , Jeko Jozsef , Brahmbhatt D. I.
Published: October 2006

ChemInform 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 Straightforward Synthesis of glyco‐2,7‐ and 2,8‐Dienes.
Authors: Dolhem Franck , Smiljanic Nicolas , Lievre Catherine , Demailly Gilles
Published: October 2006

ChemInform 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 New Radical Scavenging Anthracene Glycoside, Asperflavin Ribofuranoside, and Polyketides from a Marine Isolate for the Fungus Microsporum.
Authors: Li Yong , Li Xifeng , Lee Uk , Kang Jung Sook , Choi Hong Dae , Son Byeng Wha
Published: October 2006

ChemInform 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.
Sulfuric Acid Immobilized on Silica: An Efficient Reusable Catalyst for the Synthesis of O‐Isopropylidene Sugar Derivatives.
Authors: Rajput Vishal Kumar , Mukhopadhyay Balaram
Published: October 2006

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Enantioselective Synthesis of Aurisides A (Ia) and B (Ib), Cytotoxic Macrolide Glycosides of Marine Origin.
Authors: Suenaga Kiyotake , Hoshino Hiroshi , Yoshii Takanori , Mori Kazunori , Sone Hiroki , Bessho Yuhki , Sakakura Akira , Hayakawa Ichiro , Yamada Kiyoyuki , Kigoshi Hideo
Published: October 2006

ChemInform 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, Characterization and Complexation Behavior Investigations of Novel Bis‐ and Tris‐Crown Ethers.
Authors: Huang Zhi Bin , Kim Sung Hong , Chang Seung Hyun
Published: October 2006

ChemInform 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.
Mechanisms for Photogeneration and Recombination of Multiexcitons in Semiconductor Nanocrystals: Implications for Lasing and Solar Energy Conversion
Authors: Klimov Victor I.
Published: October 2006

ChemInform 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.
Antiferromagnetism of Mn Alloys
Authors: Sakuma Akimasa , Fukamichi Kazuaki
Published: October 2006

ChemInform 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.
Singular Modification Effects of Metal Cations and Metal Complex Ions on the Catalytic Properties of Metal Colloidal Nanocatalysts
Authors: Yu William W. , Liu Hanfan
Published: October 2006

ChemInform 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.
Relationship Between One‐Electron Transition‐Metal Reactivity and Radical Polymerization Processes
Authors: Poli Rinaldo
Published: October 2006

ChemInform 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.
Carbohydrate‐Based Molecular Scaffolding
Authors: Velter Ingrid , La Ferla Barbara , Nicotra Francesco
Published: October 2006

ChemInform 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.
Approach Towards Highly Oxygenated cis‐Decalins from Sugar Allyltins
Authors: Jarosz Slawomir , Nowogrodzki Marcin
Published: October 2006

ChemInform 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.
Intramolecularly Sn—N Coordinated Organotin Hydrides
Authors: Komsta Z. , Cmoch P. , Stalinski K.
Published: October 2006

ChemInform 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.
Seven Membered Ring Sugars: A Decade Update
Authors: Pakulski Z.
Published: October 2006

ChemInform 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.
Guanine Oxidation: One‐ and Two‐Electron Reactions
Authors: Pratviel Genevieve , Meunier Bernard
Published: October 2006

ChemInform 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.
Plasmepsins as Potential Targets for New Antimalarial Therapy
Authors: Ersmark Karolina , Samuelsson Bertil , Hallberg Anders
Published: October 2006

ChemInform 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.
Structure‐Affinity Relationships of Adenosine A2B Receptor Ligands
Authors: Beukers Margot W. , Meurs Illiana , IJzerman Adriaan P.
Published: October 2006

ChemInform 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 Optically Active β‐Diols, Diamines and Amino Alcohols by Reductive Coupling of Planar Chiral Transition Metal Complexes
Authors: Taniguchi Nobukazu , Tanaka Yoshie , Uemura Motokazu
Published: October 2006

ChemInform 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.
Studies on Carbon—Carbon Bond Forming Reactions Utilizing Activation of Unsaturated Hydrocarbons and Heteroaromatic Compounds by Metal Sulfonate Catalysts
Authors: Tsuchimoto Teruhisa
Published: October 2006

ChemInform 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.
Synthetic Studies on Oligosaccharide Mimics Carrying Sulfur Atoms in the Pyranose Rings
Authors: Hashimoto Masaru
Published: October 2006

ChemInform 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.
Mapping the Chemistry of Highly Unsaturated Pyrone Polyketides.
Authors: Miller Aubry K. , Trauner Dirk
Published: October 2006

ChemInform 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.
Smart Nanomaterials for Asymmetric Catalysis, Desulfurization of Gas Oils and Ion Separation
Authors: Pellet‐Rostaing Stephane , Favre‐Reguillon Alain , Lemaire Marc
Published: October 2006

ChemInform 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.
Computational Studies on Two Supramolecular Structures: Cyclodextrins and Rotaxanes
Authors: Jaime Carlos , de Federico Miguel
Published: October 2006

ChemInform 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.
Fluorescent Anion Complexation Agents
Authors: Curiel David , Hayes Elizabeth J. , Beer Paul D.
Published: October 2006

ChemInform 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.
Neutral, Radical [CpNi(dithiolene)] Complexes with Flexible, Nonplanar Seven‐Membered Rings: [CpNi{S2C2S2(CH2)2X}] (X = CH2, CF2, C=CH2, S, C=O)
Authors: Nomura Mitsushiro , Geoffroy Michel , Adkine Prashant , Fourmigué Marc
Published: October 2006

Neutral, radical [CpNi(dithiolene)] complexes fused with seven‐membered rings, formulated as [CpNi{S2C2S2(CH2)2X}] (X = CH2, CF2, C=CH2, S), have been synthesized in 30–60 % yields from the reactions of nickelocene with the corresponding neutral, square‐planar, (dithiolene)nickel complexes [Ni{S2C2S2(CH2)2X}2]. [CpNi{S2C2S2(CH2)2X}] (X = C=O) was prepared from nickelocene and [1,3]dithiolo[4,5‐b][1,4]dithiepine‐2,6‐dione under thermal or photochemical conditions. All complexes exhibit reversible oxidation and reduction waves to the cation and anion form, respectively. The terminal groups (X) in the seven‐membered ring shift their redox potentials to anodic potentials in the following order: CF2 > C=O > S > C=CH2 > CH2. The singlet EPR responses of [CpNi{S2C2S2(CH2)2(X)}] appear at g ≈ 2.0514–2.0529 in dichloromethane solution at room temperature. An NIR absorption is observed at λmax ≈ 798–848 nm (ϵ ≈ 1700–2400 M–1 cm–1) in dichloromethane solution. The X‐ray structures of the five complexes show two‐legged piano‐stool geometries around the central nickel atom (formally NiIII) and strong distortions from planarity of the seven‐membered C2S2(CH2)2X rings. In the solid state, those radical (S = 1/2) species adopt either one‐dimensional alternating chain‐like motifs (X = CH2, C=CH2, S) or dimeric entities characterized by a singlet–triplet magnetic behavior (X = CF2, C=O). (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
Development of a three‐dimensional finite element model of a human mandible containing endosseous dental implants. II. Variables affecting the predictive behavior of a finite element model of a human mandible
Authors: Al‐Sukhun Jehad , Lindqvist Christian , Helenius Miia
Published: October 2006

The purpose of this study was to propose a systematic approach to validate a finite element model (FEM) of the human mandible and to investigate the effects of changing the geometry and orthotropic material properties on the FEM predictions. Thirty‐eight variables affecting the material properties, boundary conditions, and the geometry of a FEM of a human mandible, including two dental implants, were systematically changed, creating a number of FEMs of the mandible. The effects of the variations were quantified as differences in the principal strain magnitudes modeled by the original FEM (gold standard), prior to the sensitivity analyses, and those generated by the changed FEMs. The material properties that had the biggest impact on the predicted cortical principal strain were the shear moduli (up to 31% in difference from the unchanged state), and the absence of cancellous bone (up to 34%). Alterations to the geometry of the mandibular cross section, such as an increase in corpus dimensions, had the greatest effect on principal strain magnitudes (up to 16%). Changes in the cortical thickness in relation to the width of the corpus section modified strain more than alterations to the corpus depth (14% and 5%, respectively). The relatively small difference (up to 13.5%) between the predicted and measured interimplant distances indicates the accuracy of the FEM. Changes in geometry and orthotropic material properties could induce significant changes in strain patterns. These values must therefore be chosen with care when using finite element techniques for predicting stresses, strains, and displacements. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res, 2007
Glutenin structure
Authors: Ewart J. A. D.
Published: October 2006

The fall in viscosity of dispersions of gluten when treated with excess of mercaptoethanol does not exhibit an initial induction period. This finding appears to rule out the idea that glutenin is highly crosslinked in a branching mode. It is compatible with a linear model in which one SS bond, not two, joins adjacent chains, or a model with low levels of branching. However, it is unnecessary to postulate branching crosslinks to explain glutenin properties in the present state of knowledge. The insoluble residue fraction of wheat flour protein is believed to be mainly linear glutenin of high molecular weight. A linear hypothesis can account for the Orth and Bushuk effect, in which baking quality is positively and negatively correlated with insoluble and soluble protein, respectively. It is suggested that gliadin may act as a plasticiser and aid to dispersion of glutenin.
In vitro digestibility of protein from barley and other cereals
Authors: Büchmann Nils B.
Published: October 2006

An in vitro method for measuring barley protein digestibility is presented. Samples were first incubated with pepsin in HCl; pancreatin was then added concomitantly with a bacteriostatic borate buffer. After TCA‐precipitation, soluble nitrogen was measured. The digestion was unaffected by accumulated free amino acids. There were no free amino acids following pepsin treatment, but the essential ones were well liberated by pancreatin. Results for barley grown in the field or in pots, and for decortified barley fractions agreed with true digestibility values determined with rats. Of these samples, the field‐grown barleys per se differed too little for the accuracy to be confirmed. The other cereals tested, oats, rye, maize, wheat, and rice, gave unsatisfactory results with pepsin/pancreatin, and also with pepsin, pancreatin, or pronase used separately. The ranking of the cereals according to in vitro digestibility depended on the type of enzyme and on the enzyme‐to‐substrate ratio.
High performance liquid chromatography of cider procyanidins
Authors: Lea Andrew G. H.
Published: October 2006

Cider procyanidins were successfully separated by h.p.l.c on hydrocarbon bonded reverse‐phase packings with acidified water‐methanol eluents. Adsorptive separations were useful for low molecular weight procyanidins but generally suffered from excessive k values, whilst gel‐permeation separations provided less resolution than might be expected from consideration of the molecular weight range present.
Correlation of bitterness thresholds of amino acids and peptides with molecular connectivity
Authors: Gardner Ronald J.
Published: October 2006

Molecular connectivity values are easily calculated topological indices related to the degree of branching (hence the size and shape) of any chemical structure considered. These structural parameters are significantly correlated with literature values for the bitterness thresholds of amino acids, peptides and their derivatives. The quantitative correlation of flavour thresholds with structural parameters may prove useful for predicting thresholds of untested compounds; the potential and disadvantages of this approach are discussed.