bluuebunny/crossref_metadata_2025_split huggingface dataset:
A qualitative study of zooplankton grazing in an oligo‐mesotrophic lake using phytoplanktonic pigments as organic markers
Authors: Quiblier‐Llobéras Catherine , Bourdier Gilles , Amblard Christian , Pepin Denise 
Published: May 2010

The impact of grazing by various zooplankton fractions (calanoid copepods, cyclopoid copepods, cladocerans, and small‐sized zooplankton: 80–315 µm) on various phytoplankton groups was measured in Lake Pavin (Central Massif, France) by means of phytoplankton pigments separated by HPLC as natural organic markers. The impact of grazing was determined from April to November in the depth‐sampling layers (0–7 and 7–20 m) in which most zooplankton organisms were concentrated.Selective grazing by consumers created spatial (vertical) and temporal variation in mortality exerted on the various phytoplankton groups. For example, the avoidance of dinoflagellates (characterized by peridinin) by most of the zooplankton organisms studied led to low grazing impacts (<280 ml liter‒1 d‒1) on this phytoplankton group during all seasons. In contrast, preferential consumption of diatoms and chrysophytes (characterized by fucoxanthin) and chlorophytes and cyanobacteria (characterized by lutein and zeaxanthin) was recorded, depending on the zooplankton fraction in question. The grazing impact exerted on these phytoplanktonic groups was much higher than that measured on dinoflagellates, reaching values of 2,300 ml liter‒1 d‒1. Grazing mostly affected diatoms and chrysophytes in the 0–7‐m layer and chlorophytes and cyanobacteria in the 7–20‐m layer; the differences between these two layers were related to the heterogeneity in the vertical distribution of both phytoplankton cells and grazing organisms.
Monitoring working conditions and health of older workers in Dutch construction industry
Authors: Hoonakker Peter , van Duivenbooden Cor 
Published: May 2010

AbstractBackgroundAccurate reporting of work‐related conditions is necessary to monitor workplace health and safety and to identify the interventions that are most needed. In the Netherlands, working conditions and health are monitored on an aggregated level in the construction industry. One of the purposes of monitoring is to identify specific risk factors and risk groups. The objectives of this study was to examine (1) whether older workers (≥55 years) in the construction industry are a special group at risk and (2) whether there are specific risk factors for older workers in the construction industry.MethodsEvery 2 years, more than 70,000 construction workers in the Netherlands fill out a questionnaire as part of their periodic health checkup. In a repeated cross‐sectional (trend) design, we compared working conditions (physical and psychological demands), musculoskeletal disorders (symptoms and conditions), and injuries of older workers with other age categories.ResultsOlder construction workers have fewer complaints about physically demanding work and psychosocial workload, but have more complaints about working in awkward postures. Older workers have more complaints about their health than workers in other age categories. Older construction workers have fewer injuries than younger workers.ConclusionsOlder construction workers are a risk group for musculoskeletal disorders. Working in awkward postures can be considered a risk factor for older workers in construction industry. Am. J. Ind. Med. 53: 641–653, 2010. © 2010 Wiley‐Liss, Inc.
Evaluating the improvement in diagnostic utility from adding new predictors
Authors: Li Caixia , Lu Ying 
Published: May 2010

AbstractMultiple diagnostic tests and risk factors are commonly available for many diseases. This information can be either redundant or complimentary. Combining them may improve the diagnostic/predictive accuracy, but also unnecessarily increase complexity, risks, and/or costs. The improved accuracy gained by including additional variables can be evaluated by the increment of the area under (AUC) the receiver‐operating characteristic curves with and without the new variable(s). In this study, we derive a new test statistic to accurately and efficiently determine the statistical significance of this incremental AUC under a multivariate normality assumption. Our test links AUC difference to a quadratic form of a standardized mean shift in a unit of the inverse covariance matrix through a properly linear transformation of all diagnostic variables. The distribution of the quadratic estimator is related to the multivariate Behrens–Fisher problem. We provide explicit mathematical solutions of the estimator and its approximate non‐central F‐distribution, type I error rate, and sample size formula. We use simulation studies to prove that our new test maintains prespecified type I error rates as well as reasonable statistical power under practical sample sizes. We use data from the Study of Osteoporotic Fractures as an application example to illustrate our method.
Gelation‐Induced Enhanced Fluorescence Emission from Organogels of Salicylanilide‐Containing Compounds Exhibiting Excited‐State Intramolecular Proton Transfer: Synthesis and Self‐Assembly
Authors: Nayak Manoj Kumar , Kim Byung‐Hwa , Kwon Ji Eon , Park Sanghyuk , Seo Jangwon , Chung Jong Won , Park Soo Young 
Published: May 2010

AbstractSelf‐assembly structure, stability, hydrogen‐bonding interaction, and optical properties of a new class of low molecular weight organogelators (LMOGs) formed by salicylanilides 3 and 4 have been investigated by field‐emission scanning electron microscopy (FESEM), X‐ray diffraction (XRD), UV/Vis absorption and photoluminescence, as well as theoretical studies by DFT and semiempirical calculations with CI (AM1/PECI=8) methods. It was found that salicylanilides form gels in nonpolar solvents due to π‐stacking interaction complemented by the presence of both inter‐ and intramolecular hydrogen bonding. The supramolecular arrangement in these organogels predicted by XRD shows lamellar and hexagonal columnar structures for gelators 3 and 4, respectively. Of particular interest is the observation of significant fluorescence enhancement accompanying gelation, which was ascribed to the formation of J‐aggregates and inhibition of intramolecular rotation in the gel state.
Guest⊂Guest⊂Host Multicomponent Molecular Crystals: Entrapment of Guest⊂Guest in Honeycomb Networks Formed by Self‐Assembly of 1,3,5‐Tri(4‐hydroxyaryl)benzenes
Authors: Moorthy Jarugu Narasimha , Natarajan Palani 
Published: May 2010

AbstractSterically‐engineered rigid trigonal molecular modules based on 1,3,5‐tri(4‐hydroxyphenyl)benzenes H1 and H2 undergo O‐H⋅⋅⋅O hydrogen‐bonded self‐assembly into eight‐fold catenated hexagonal (6,3) and two‐fold interpenetrated undulated square (4,4) networks, respectively. In the presence of [18]crown‐6 as a guest, the triphenol H1 is found to self‐assemble into a honeycomb network with hexagonal voids created between three triphenol building blocks. The guest [18]crown‐6 molecules are found to be nicely nested in hexagonal enclosures. The empty spaces within the crowns can be further filled with neutral (MeOH/water, MeOH/MeNO2) or ionic guest species such as KI/KAcAc to furnish novel multicomponent assemblies, that is, guest⊂guest⊂host, that typify Russian dolls. In contrast, triphenol H2 is found to yield analogous multicomponent molecular crystals in which the guest crown–K+ acts as a spacers in the hydrogen‐bonded self‐assembly that leads to distorted chicken wire networks.
Chirality‐Sensing Binaphthocrown Ether–Polythiophene Conjugate
Authors: Fukuhara Gaku , Inoue Yoshihisa 
Published: May 2010

AbstractAn enantiomeric binaphthyl unit was tethered to adjacent thiophenes with oxyethylene linkers to give a chiral polythiophene with binaphthocrown ether cavities. Upon inclusion of a chiral cationic guest in the cavity of the chiral crown ether–polythiophene conjugate, the bithiophene unit was twisted to shorten the effective conjugation length of polythiophene backbone, enabling us to sense the guest binding by reading out the amplified optical signal gains arising from the backbone structure change. This strategy allowed us to discriminate the guest chirality without using chiroptical signals or a circular dichroism spectrometer to achieve the highest enantioselectivity of 7.3 for valine methyl ester with a 40‐fold enhanced sensitivity compared with the corresponding monomeric sensor.
Synthesis and Properties of Chiral Pyrazolidines Derived from (+)‐Pulegone
Authors: Jakob Florian , Herdtweck Eberhardt , Bach Thorsten 
Published: May 2010

AbstractSeveral enantiomerically pure N(2)‐substituted octahydroindazoles were prepared as bicyclic pyrazolidine derivatives of (+)‐pulegone. Condensation of pulegone with hydrazine delivered a hexahydroindazole intermediate, which underwent N(2)‐substitution with various electrophiles (alkyl halides, acyl chlorides, phenyl isocyanate). The resulting N(2)‐substituted hexahydroindazoles could be reduced with LiBEt3H in THF to the target compounds. In addition, a N(2)‐thiobenzoyl and some N(2)‐carbamoyl derivatives as well as a N(1)‐substituted octahydroindazole were synthesized. The compounds showed medium activity as iminium ion catalysts promoting quantitatively the Michael addition of nitroethane to cinnamaldehyde in up to 82 % ee for the resulting syn‐diastereoisomer and 78 % ee for the anti‐diastereoisomer. Unexpectedly, the N(2)‐acyloctahydroindazoles were readily oxidized under aerobic conditions. Moreover, it was shown that an oxidation of methyl phenyl sulfide to the corresponding sulfoxide is promoted by an N(2)‐acyloctahydroindazole in deuterochloroform as solvent. It is proposed that the oxidation of N(2)‐acyloctahydroindazoles proceeds by in situ generation of hydrogen peroxide, which in turn can act as an oxidant.
Sterically Crowded peri‐Substituted Naphthalene Phosphines and their PV Derivatives
Authors: Knight Fergus R. , Fuller Amy L. , Bühl Michael , Slawin Alexandra M. Z. , Woollins J. Derek 
Published: May 2010

AbstractThree sterically crowded peri‐substituted naphthalene phosphines, Nap[PPh2][ER] (Nap=naphthalene‐1,8‐diyl; ER=SEt, SPh, SePh) 1–3, which contain phosphorus and chalcogen functional groups at the peri positions have been prepared. Each phosphine reacts to form a complete series of PV chalcogenides Nap[P(E′)(Ph2)(ER)] (E′=O, S, Se). The novel compounds were fully characterised by using X‐ray crystallography and multinuclear NMR spectroscopy, IR spectroscopy and MS. X‐ray data for 1, 2, n O, n S, n Se (n=1–3) are compared. Eleven molecular structures have been analysed by naphthalene ring torsions, peri‐atom displacement, splay angle magnitude, X⋅⋅⋅E interactions, aromatic ring orientations and quasi‐linear arrangements. An increase in the congestion of the peri region following the introduction of heavy chalcogen atoms is accompanied by a general increase in naphthalene distortion. P⋅⋅⋅E distances increase for molecules that contain bulkier atoms at the peri positions and also when larger chalcogen atoms are bound to phosphorus. The chalcogenides adopt similar conformations that contain a quasi‐linear E⋅⋅⋅PC fragment, except for 3 O, which displays a twist‐axial‐twist conformation resulting in the formation of a linear O⋅⋅⋅SeC alignment. Ab initio MO calculations performed on 2 O, 3 O, 3 S and 3 Se reveal Wiberg bond index values of 0.02 to 0.04, which indicates only minor non‐bonded interactions; however, calculations on radical cations of 3 O, 3 S and 3 Se reveal increased values (0.14–0.19).
ChemInform Abstract: Shape and Phase Control of ZnS Nanocrystals: Template Fabrication of Wurtzite ZnS Single‐Crystal Nanosheets and ZnO Flake‐Like Dendrites from a Lamellar Molecular Precursor ZnS× (NH2CH2CH2NH2)0.5.
Authors: Yu Shu‐Hong , Yoshimura Masahiro 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Neutron Diffraction Study of HfFe6Ge6‐Type ErMn6Ge6‐xGax Compounds (x = 0.2, 0.4 and 1.0).
Authors: Lefevre C. , Venturini G. , Malaman B. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Magnetic Structure of Tb2Mn3Si5.
Authors: Nirmala R. , Morozkin A. V. , Hofmann M. , Sankaranarayanan V. , Sethupathi K. , Yamamoto Y. , Hori H. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Enantioselective Conjugate Additions of Aldoximes to 3‐Crotonoyl‐2‐oxazolidinone and 1‐Crotonoyl‐3‐phenyl‐2‐imidazolidinone Catalyzed by the Aqua Complex Between R,R‐DBFOX/Ph and Zinc(II) Perchlorate.
Authors: Nakama Kimitaka , Seki Sumito , Kanemasa Shuji 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Heck Arylations of N‐Acyl‐3‐pyrroline and N‐Acyl‐1,2,5,6‐tetrahydropyridine with Aryldiazonium Salts. Short Syntheses of Aryl γ‐ and δ‐Lactams, Baclofen, Homobaclofen and Analogues.
Authors: Carpes Marcos Jose S. , Correia Carlos Roque D. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Carbonylation of Alkynols Catalyzed by Pd(II)/2‐PyPPh2 Dissolved in Organic Solvents and in Ionic Liquids: A Facile Entry to α‐Methylene γ‐ and δ‐Lactones.
Authors: Consorti Crestina S. , Ebeling Gunter , Dupont Jairton 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Highly Efficient Antibody‐Catalyzed Deuteration of Carbonyl Compounds.
Authors: Shulman Avidor , Sitry Danielle , Shulman Hagit , Keinan Ehud 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Facile Synthesis of Ketones from 1,1‐Disilylethenes via Oxidation of gem‐Disilylalkanes.
Authors: Inoue Atsushi , Kondo Junichi , Shinokubo Hiroshi , Oshima Koichiro 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Some 2,7‐Disubstituted Biphenylene and Studies of Their Lithiation Reactions.
Authors: Larkem A. , Larkem H. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Fluorinated Carbanions. Part 3. (9H‐Fluoren‐9‐ylidene)fluoromethyllithium, a Stabilized Fluoroalkenyl Carbanion. Preparation, Reactions, 13C and 19F NMR Spectra.
Authors: Kvicala Jaroslav , Pelter Andrew 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Single‐Crystalline Photochromism of Diarylethene Mixtures.
Authors: Yamada Taro , Kobatake Seiya , Irie Masahiro 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Modular Approach to Porphyrin Oligomers Using Metal Ions as Connectors.
Authors: Richeter S. , Jeandon C. , Ruppert R. , Callot H. J. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Preparatively Simple Access to Homochiral Heterocyclic α‐Hydroxy Acids and Their Derivatives.
Authors: Burger Klaus , Windeisen Elisabeth , Heistracher Elisabeth , Lange Torsten , Abdel‐Aleem Abdel‐Aleem H. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of 2‐Aryl‐3‐(N9‐carbazolylacetamidyl)‐4‐oxothiazolidines and Their 5‐Arylidenes as Antifungal and Analgesic Agents.
Authors: Srivastava S. K. , Srivastava S. , Srivastava S. D. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Potent in vitro Methicillin‐Resistant Staphylococcus aureus Activity of 2‐(1H‐Indol‐3‐yl)tetrahydroquinoline Derivatives.
Authors: Hoemann Michael Z. , Xie Roger L. , Rossi Richard F. , Meyer Sylvia , Sidhu Alban , Cuny Gregory D. , Hauske James R. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Unique Fluorescent Properties of 1‐Aryl‐3,4‐diphenylpyrido[1,2‐a]benzimidazoles.
Authors: Hirano Keisuke , Oderaotoshi Yoji , Minakata Satoshi , Komatsu Mitsuo 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis, Enantioseparation and Pharmacological Activity of 4‐Aryl‐7,7‐dimethyl‐5‐oxo‐1,2,3,4,5,6,7,8‐octahydroquinazoline‐2‐thiones .
Authors: Yarim Mine , Sarac Selma , Ertan Mevluet , Kilic F. Sultan , Erol Kevser 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Cyclic Thiatetraynes: Syntheses and Structural Properties.
Authors: Rausch Bernhard J. , Werz Daniel B. , Rittinger Stefan , Gleiter Rolf , Oeser Thomas , Rominger Frank 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: 9‐Carboranylcarbene by Indirection.
Authors: Ye Qing , Li Ji , Jones Jr. Maitland , Wu Haitao , McKee Michael L. , Shevlin Philip B. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Selective Si—Si Bond Cleavage of Decaisopropylbicyclo[2.2.0]hexasilane with Hydrobromic Acid and Hydrochloric Acid.
Authors: Meguro Akira , Sakurai Haruaki , Kato Kei , Kyushin Soichiro , Matsumoto Hideyuki 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Palladium‐Catalyzed Asymmetric Hydrosilylation of 4‐Substituted 1‐Buten‐3‐ynes. Catalytic Asymmetric Synthesis of Axially Chiral Allenylsilanes.
Authors: Han Jin Wook , Tokunaga Norihito , Hayashi Tamio 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: New Dolabellane‐Type Diterpenoids from the Okinawan Soft Coral of the Genus Clavularia.
Authors: Iguchi Kazuo , Sawai Hisako , Nishimura Hiroto , Fujita Minako , Yamori Takao 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Cycloartane Glycosides from Cimicifuga dahurica.
Authors: Zhang Qing‐Wen , Ye Wen‐Cai , Hsiao Wendy W.‐L. , Zhao Shou‐Xun , Che Chun‐Tao 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.