bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Unifying the Current Data on the Mechanism of Cleavage‐ Transesterification of RNA
Authors: PERREAULT D. M. , ANSLYN E. V. 
Published: August 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: Type II Intramolecular Annulations Between Vinylcarbenoids and Furans.
Authors: DAVIES H. M. L. , CALVO R. , AHMED G. 
Published: August 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: Sodium Borohydride in an Acetonitrile Medium: An Efficient Reagent for Reductive Beckmann Type Fragmentation of α‐Amino Oximes.
Authors: PETUKHOV P. A. , TKACHEV A. V. 
Published: August 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 New Facile Method for the Chemoselective Reductive Transformation of Azides to N‐(tert‐Butoxycarbonyl)amines.
Authors: KOTSUKI H. , OHISHI T. , ARAKI T. 
Published: August 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 Conversion of 1‐Methyl Group of Guaiazulene into 1‐Formyl Group.
Authors: OKAJIMA T. , KUROKAWA S. 
Published: August 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: Quinone Diazides and Enaminones as a Source of New Azo Compounds with Potential Nonlinear Optical Properties.
Authors: FIGUEIREDO L. J. O. , KASCHERES C. 
Published: August 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 Convenient Route to Aryl Substituted Chloro and Bromo Olefins.
Authors: KUMARASWAMY S. , SWAMY K. C. K. 
Published: August 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 Formation of Mono‐ and Tetra‐Cycloadducts by the Diels‐Alder Reaction of (60)Fullerene with 2,5‐Dimethylthiophene S‐Oxides.
Authors: ZENG H. , EGUCHI S. 
Published: August 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: The Synthesis of Imidazoline Analogues of the Kainoid Family.
Authors: BAUMGARTNER H. , O'SULLIVAN A. C. 
Published: August 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: Design of Photoaffinity Reagents for Labeling the Auxin Receptor in Maize.
Authors: KOSEMURA S. , EMORI H. , YAMAMURA S. , ANAI T. , TOMITA K. , HASEGAWA K. 
Published: August 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: First Example of a Third Generation Nitrone Cycloaddition.
Authors: DE MARCH P. , FIGUEREDO M. , FONT J. , MILAN S. , ALVAREZ‐LARENA A. , PINIELLA J. F. , MOLINS E. 
Published: August 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: Exploiting the 1,3‐Dithiane of 2‐Oxopropanenitrile Oxide to Limit Competing Dimerization in 1,3‐Dipolar Cycloaddition Reactions.
Authors: BARROW S. J. , EASTON C. J. , SAVAGE G. P. , SIMPSON G. W. 
Published: August 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 1,4‐Dihydropyridines (IV) by Regioselective Additions of Benzylic Zinc Bromides to Pyridinium Salts and Their Aromatizations to 4‐Benzylpyridines (V).
Authors: KRAPCHO A. P. , WATERHOUSE D. J. , HAMMACH A. , DI DOMENICA R. , MENTA E. , OLIVA A. , SPINELLI S. 
Published: August 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: Convenient Preparation of Trifluoroacetyl Meldrum′s Acid and Its Use as a Building Block for Trifluoromethyl‐Containing Compounds.
Authors: MORITA Y. , KAMAKURA R. , TAKEDA M. , YAMAMOTO Y. 
Published: August 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 Convenient Large Scale Synthesis of 2‐Hydroxy‐3‐pinanone.
Authors: KRISHNAMURTHY V. , LANDI J. J. JUN. , ROTH G. P. 
Published: August 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 Facile Transgalactosylation Catalyzed by a Lipid‐Coated β‐D‐ Galactosidase in the Water‐Organic Two Phases.
Authors: MORI T. , FUJITA S. , OKAHATA Y. 
Published: August 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: An Efficient Formal Synthesis of Balanol via the Asymmetric Epoxide Ring Opening Reaction.
Authors: WU M. H. , JACOBSEN E. N. 
Published: August 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.
Excited State Intramolecular Proton Transfer of New Diphenyl‐ ethylene Derivatives Bearing Imino Group: A Combination of Experimental and Theoretical Investigation
Authors: Gao Fang , Zhong Xiaolin , Wang Qi , Li Hongru , Zhang Shengtao 
Published: August 2010

AbstractIn this paper, we described the synthesis and characterization of new diphenylethylene bearing imino group. We concentrated particularly on the investigation of the possibility of the excited state intramolecular charge transfer (ESIPT) of the new dyes experimentally and theoretically. The absorption and fluorescence spectroscopy of the dyes were determined in various solvents. The results showed that the maximal absorption wavelength of 2‐[(4′‐N,N‐dimethylamino‐diphenylethylene‐4‐ylimino)methyl]phenol (C1) and 4‐[(4′‐N,N‐dimethylamino‐diphenylethylene‐4‐ylimino)methyl]phenol (C2) exhibited almost independence on the solvent polarity. While as contrast, the maximal fluorescence wavelength of the dyes showed somewhat dependence on the solvent polarity. In particular, C1 displayed well‐separated dual fluorescence spectroscopy. The second fluorescence peak was characterized with an "abnormal" fluorescence emission wavelength in aprotic solvents with large Stokes shift (ca. 140 nm in THF), which was much more than normal Stokes shift (ca. 30 nm in THF). This emission spectroscopy could be assigned to ESIPT emission. On the other hand, the ESIPT fluorescence of C1 was much reduced or lost in the protic solvents. While, only normal fluorescence emission was detected in various solvents. Although the absorption maxima of C1 exhibited about 10 nm red‐shift with respect to those of C2, the normal fluorescence maxima of C1 and C2 were almost identical in various solvents. These results suggested that C1 could undergo ESIPT, but C2 was not able to proceed ESIPT. The molecular geometry optimization of phototautomers in the ground electronic state (S0) was carried out with HF method (Hartree‐Fock) and at DFT level (Density Functional Theory) using B3LYP both, while the CIS was employed to optimize the geometries of the first singlet excited state (S1) of the phototautomers of C1 and C2 respectively. The properties of the ground state and the excited state of the phototautomers of C1 and C2, including the geometrical parameter, the energy, the frontier orbits, the Mulliken charge and the dipole moment change were performed and compared completely. The data were analyzed further based on our experimental results. Furthermore, the absorption and fluorescence spectra were calculated in theory and compared with the measured ones. The rate constant of internal proton transfer (9.831×1011 s−1) of C1 was much lower than that of salicylidene methylamine (C3, 2.045×1015 s−1), which was a typical Schiff base compound and was well demonstrated to undergo ESIPT easily under photoexcitation.
The Active Core in a Triazole Peptide Dual‐Site Antagonist of HIV‐1 gp120
Authors: Umashankara Muddegowda , McFadden Karyn , Zentner Isaac , Schön Arne , Rajagopal Srivats , Tuzer Ferit , Kuriakose Syna A. , Contarino Mark , LaLonde Judith , Freire Ernesto , Chaiken Irwin 
Published: August 2010

AbstractIn an effort to identify broadly active inhibitors of HIV‐1 entry into host cells, we previously reported a family of dodecamer triazole–peptide conjugates with nanomolar affinity for the viral surface protein gp120. This peptide class exhibits potent antiviral activity and the capacity to simultaneously inhibit interaction of the viral envelope protein with both CD4 and co‐receptor. In this investigation, we minimized the structural complexity of the lead triazole inhibitor HNG‐156 (peptide 1) to explore the limits of the pharmacophore that enables dual antagonism and to improve opportunities for peptidomimetic design. Truncations of both carboxy‐ and amino‐terminal residues from the parent 12‐residue peptide 1 were found to have minimal effects on both affinity and antiviral activity. In contrast, the central triazole(Pro)‐Trp cluster at residues 6 and 7 with ferrocenyl‐triazole(Pro) (Ftp) was found to be critical for bioactivity. Amino‐terminal residues distal to the central triazole(Pro)‐Trp sequence tolerated decreasing degrees of side chain variation upon approaching the central cluster. A peptide fragment containing residues 3–7 (Asn‐Asn‐Ile‐Ftp‐Trp) exhibited substantial direct binding affinity, antiviral potency, dual receptor site antagonism, and induction of gp120 structuring, all properties that define the functional signature of the parent compound 1. This active core contains a stereochemically specific hydrophobic triazole(Pro)‐Trp cluster, with a short N‐terminal peptide extension providing groups for potential main chain and side chain hydrogen bonding. The results of this work argue that the pharmacophore for dual antagonism is structurally limited, thereby enhancing the potential to develop minimized peptidomimetic HIV‐1 entry inhibitors that simultaneously suppress binding of envelope protein to both of its host cell receptors. The results also argue that the target epitope on gp120 is relatively small, pointing to a localized allosteric inhibition site in the HIV‐1 envelope that could be targeted for small‐molecule inhibitor discovery.
Die taxonomische Stellung und das Areal von Angelica archangelica L. und A. lucida L
Authors: Weinert Erich 
Published: August 2010

AbstractDie Eingliederung der Formenkreise von Angelica archangelica L. und A. lucida L. und ihre Stellung innerhalb der Gattung Angelica L. werden mit morphologischen Merkmalen begründet.Sie werden zwei verschiedenen Sektionen, der sect. Coelopleurum (Leder.) Pimen. und der sect. Archangelica Regel der Gattung Angelica L. zugeordnet, die jedoch eng miteinander verwandt sind.Die zirkumpolare vorwiegend holarktische Verbreitung der Gattung Angelica L. und die Verbreitung der Arten der Sektionen werden durch Arealkarten und Arealdiagnosen veranschaulicht. A. archangelica L. wird in die subsp. archangelica mit den var. decurrens (Ledeb.) comb. nov., f. decurrens, f. tschimganica (Korov.) comb. nov., f. komarovii (Schischk.) comb. nov., f. himalaica (Clarke) comb. nov., var. sativa (Mill.) Rikli und in die subsp. litoralis (Fries) Thell. gegliedert.
Vierter Beitrag zur Kenntnis der Flora der Mongolischen Volksrepublik Ergebnisse der Mongolisch‐Deutschen Biologischen Expeditionen seit 1962, Nr. 182
Authors: Hilbig Werner 
Published: August 2010

AbstractIn der vorliegenden Arbeit werden neue Fundorte von Pflanzen aus verschiedenen Gebieten der MVR mitgeteilt. Sie stammen im wesentlichen aus dem östlichen und nördlichen Changai, dem Chubsugul‐Gebiet, dem südlichen und östlichen Chentej und dem Gobi‐Altai. Für verschiedene pflanzengeographische Bezirke werden Erstnachweise erbracht. Als Neufunde für die MVR werden folgende Arten nachgewiesen:Asplenium septentrionale; Carex pycnostachya; Carex erawinensis; Carex laxa; Elymus varius.
Comparative and phylogenetic significance of the colleters in the family Apocynaceae
Authors: Thomas Vinoth , Dave Yash 
Published: August 2010

AbstractA comparative and phylogenetic significance of colleters of 19 members of the family Apocynaceae are studied on the basis of both morphological and anatomical features. Colleters are present on the adaxial side of petiole, bract, bracteole, calyx and corolla. In many members colleters are intermingled with petiolar hairs. Structurally a colleter consists of a central core of parenchyma cells surrounded by radially elongated epithelial cells. Besides the normal structure, unicellular epithelial hair, sub‐epidermal cells, vasculature and laticifer are also observed in the colleter tissue of various genera. It is considered that the colleters are multicellular secretory structures protecting the meristem.
Taxonomy of medicinal plants: Foliar epidermal characters in the genus Monodora (Annonaceae)
Authors: Pereira‐Sheteolu A. O. 
Published: August 2010

AbstractLeaf epidermal morphology of West African species of Monodora (Annonaceae) has been studied using light microscopy. Epidermal cells are either isodiametric or irregular in shape. The anticlinal walls may be straight, curved or undulate. All taxa have paracytic stomata which are hypostomatically distributed. A dichotomous key for identifying the species, even if they are in a fragmentary condition, is presented.
Phenological studies in aquatic macrophytic plants of lower Gangetic Delta, West Bengal, India With 10 Figures and 3 Tables
Authors: Ghosh S. K. , Santra S. C. , Mukherjee P. K. 
Published: August 2010

AbstractThe phenology of most of the aquatic macrophytes as studied in three distinct zones was found to be influenced by physico‐chemical properties of water as well as several other environmental properties like light availability and water temperature. Among the physico‐chemical properties of water salinity played significant role on the overall phenological behaviour of species. The vegetative growth in Zone B was slightly delayed in most of the species than other two zones.Flowering and fruiting periodicity was more seasonal in Zone A than the rest two zones. The extended period of flowering may be seen in Zone A and Zone C. Pollinators are mostly dipteran insects, although hydrophylly and transitional pollination was also recorded in several species. More than one pollinators for individual plant were also evidenced in case of plant species having large showy flowers.Fruiting in Zone B was somewhat lower than other two zones. Most of the species showed hydrochores, although ornithochory, ichthyochory was also evidenced in several plants.On the whole, environmental factors like light, temperature, rainfall, physico‐chemical properties of water immensely influence the aquatic macrophytic plant association as well as reproductive behaviour of the plant species.
The relevance of stomatal frequency, type and size in the delimitation of three complex species of Dioscorea L. (Dioscoreaceae) With 3 Figures, 8 Tables and 2 Plates
Authors: Ugborogho R. E. , Thottappilly N. Q. Ng. G. , Hahn S. K. 
Published: August 2010

AbstractThe abaxial surfaces of the fresh leaves of 6 cultivars of Dioscorea alata L. (the water yam), 10 cultivars of D. cayenensis Lam. (the yellow yam) and 34 cultivars of D. rotundata Poir. (the white yam) were investigated for variations in the frequency, type and size of stomata.Eleven stomata types, namely anomocytic, anisocytic, contiguous, paracytic, staurocytic, dicytic, tricytic, tetracytic, pentacytic, hexacytic and septacytic were observed in both D. cayenensis and D. rotundata. Among these stomata types, the paracytic, dicytic and septacytic were not found in D. alata. On the whole, the sizes of stomata increased with increase in the number of epidermal cells surrounding the guard cells especially with reference to tricytic, tetracytic and pentacytic stomata.The mean stomatal frequency per microscopic field of 400 x in the three species were 177/mm2 in D. alata. 142/mm2 in D. cayenensis and 226/mm2 in D. rotundata while the overall means of stomatal length and breadth were 32.06 μm x 22.05 μm in D. alata and 34.50 μm x 23.42 μm in D. cayenensis and 34.07 μm x 22.76 μm in D. rotundata.On the basis of the mean stomatal lengths, D. alata was separated into two groups, D. cayennensis into three and D. rotundata into four. D. alata was separated from the other two species while D. cayennensis was recognized as a variable subspecies of D. rotundata.
Carotenoids in lichens from Northern Canada
Authors: Czeczuga B. , John E. A. 
Published: August 2010

AbstractColumn and thin‐layer chromatography revealed the presence of the following carotenoids in the thalli of 20 lichen species from Northern Canada: β‐zeacarotene, α‐carotene, β‐carotene, β‐cryptoxanthin, zeaxanthin, lutein, 3′‐epilutein, antheraxanthin, lutein epoxide, canthaxanthin, astaxanthin, violaxanthin, mutatoxanthin, neoxanthin, rhodoxanthin, capsochrome, apo‐6′‐lycopenal, β‐apo‐8′‐carotenal and apo‐12′‐violaxanthal.The finding of β‐zeacarotene in the thalli ofPeltigera aphthosafrom the Yukon is the first report of this substance in lichens.The total content of carotenoids ranged from 19.04 μg · g−1dry wt forOchrolechia frigidato 50.27 μg · g−1dry wt forSphaerophorus globosus.
Apomictic behaviour in Costus afer – C. lucanusianus (Costaceae) complex in Nigeria
Authors: Edeoga H. O. , Okoli B. E. 
Published: August 2010

AbstractApomictic behaviour in Costus afer – C. lucanusianus (Costaceae) complex in Southern Nigeria had been investigated. This study showed that these species have produced intermediates which could be regarded as hybrid. Observations made on the inflorescence axis and the floral development revealed the exhibition of apomixis in C. lucanusianus J. BRAUN & K. SCHUM. and the natural hybrid but total absence of this behaviour in C. afer KER‐GAWL. In addition to apomictic behaviour, C. lucanusianus also reproduces by seed – (sexual reproduction). The outcome of the reproductive behaviour and the floral features of these taxa are the major causes of the taxonomic confusions commonly encountered by field biologists when grouping these taxa. However, the different mechanisms of apomixis give rise to a common endresult – the preservation of pure lines by essentially vegetative propagation, which produces the pattern of variation observed. Morphological characteristics of these taxa also suggest the occurrence of hybridisation in the complex; a fact that needs to be corroborated by evidence from studies on other areas such as palynology, cytology and breeding behaviour. The biological implications of these findings are interesting enough and have been discussed in this paper to the interest of the field workers, especially the taxonomists.