bluuebunny/crossref_metadata_2025 huggingface dataset:
Partial reversal of transformed fusiform phenotype by overexpression of calreticulin
Authors: Opas Michal , Fadel Marc
Published: December 2006

Calreticulin, a Ca2+-storage and chaperone protein of the ER, has also been shown to affect cell adhesiveness. To examine the effects of differential expression of calreticulin on cellular adhesiveness, we used L fibroblast cell lines stably expressing either elevated or reduced amounts of full length, ER-targeted calreticulin. Overexpression of calreticulin correlates with an increase in adhesiveness of L fibroblasts such that these transformed cells acquire epithelioid morphology and form an epithelial-cell sheet when crowded. Functionally, the “reversal” of transformed phenotype in L fibroblasts differentially overexpressing calreticulin can be accounted for by changes in levels of expression of N-cadherin and vinculin. Structurally, however, although the form and extent of cell-cell contacts in L fibroblasts overexpressing calreticulin mimicked those in normal epithelia, electron microscopical examination revealed that cell-cell junctions formed by these transformed cells bore only superficial resemblance to those of normal epithelia in culture. Our data imply that overexpression of calreticulin, while partially reverses fusiform transformed phenotype is in itself insufficient to re-establish bona fide zonulae adherens in transformed fibroblasts.
SNPs in the porcine PPARGC1a gene: Interbreed differences and their phenotypic effects
Authors: Stachowiak Monika , Szydlowski Maciej , Cieslak Jakub , Switonski Marek
Published: December 2006

Due to its function, the peroxisome proliferative activated receptor-γ, coactivator-1α (PPARGC1A) gene is a candidate in the search for genes that may affect production traits in the pig. The purpose of this study was to screen for new SNPs in exon 8 of the porcine PPARGC1A gene and to test their possible association with production traits. Altogether 736 pigs representing five breeds Polish Landrace, n=242; Polish Large White, n=192; Hampshire, n=27; Duroc, 21; Pietrain, n=12) and synthetic line 990 (n=242) were scanned via SSCP assay. Four SNPs were found; two new ones: C/G (His338Gln) and G/A Thr359Thr), and two previously reported ones: C/A (Arg369Arg) and T/A Cys430Ser). The missense T/A and C/G SNPs demonstrated pronounced interbreed variability in terms of allele frequencies, including the exclusive presence of the C/G substitution in the Hampshire breed. The tested SNPs occurred in five putative haplotypes, and their frequency also differed substantially between breeds. The association of the SNPs with production traits was tested for G/A (Thr359Thr), C/A (Arg369Arg) and T/A (Cys430Ser) substitutions in Polish Large White, Polish Landrace and line 990. The analysis revealed only breed-specific associations. The T/A (Cys430Ser) SNP was related to the feed conversion ratio in the Polish Large White (P=0.02), and the silent G/A and C/A substitutions were respectively associated with abdominal fat in line 990 and backfat thickness in Polish Landrace (P=0.04). The combined effects of the substitutions were estimated as haplotype effects. Three significant contrasts between haplotypes were calculated, but the observed associations were again only breed-specific.
Optimizing OLED Efficacy of 2,7‐Diconjugated 9,9‐Dialkylfluorenes by Variation of Periphery Substitution and Conjugation Length
Authors: Rathnayake H. P. , Cirpan A. , Delen Z. , Lahti P. M. , Karasz F. E.
Published: December 2006

The photoluminescence (PL) and electroluminescence (EL) of four 2,7‐bis(phenylethenyl)fluorenes (OFPVs) and two 2,7‐diphenylfluorenes (OFPhs) are compared to evaluate effects of nonconjugating peripheral substitution and conjugation length on their EL emissions. The OFPVs exhibit very similar PL spectra with 460–480 nm emission maxima but show large variation in the organic light‐emitting diode (OLED) efficacy: from a material that does not give persistent emission in test OLEDs (9,9‐diheptyl substitution on the fluorene ring) to materials with luminance efficiencies of 0.5 cd A–1 and greater (9,9‐diethyl substitution on the fluorene ring, methoxy and methoxy/heptyloxy substituents on the phenylethenyl rings). The best OFPV in an ITO/PEDOT:PSS/(emitter)/Ca–Al (ITO: indium tin oxide; PEDOT: poly(ethylenedioxythiophene); PSS: poly(styrene sulfonate)) OLED configuration has 9,9‐diethyl substitution and terminal heptyloxy substitution (maximum luminance of 1500 cd m–2 at 12 V). Unlike the OFPVs, the neat OFPhs show not only EL at the desired blue output of ca. 400–410 nm emission maxima but also an undesired green emission component at 500–550 nm. Blending the OFPhs with poly(methyl methacrylate) eliminates the long‐wavelength component when the emitter load is 10–25 %, but the OFPh luminance efficiencies, turn‐on voltages, and maximum luminance tend to be poorer than those of the OFPVs. The deficiencies of the OFPhs appear to be attributable to thermal degradation and oxidative reactivity, although solid‐state annealing and a nonoptimal bandgap match to the OLED device configuration may also contribute.
Stone‐tool usage by Thai long‐tailed macaques (Macaca fascicularis)
Authors: Malaivijitnond Suchinda , Lekprayoon Chariya , Tandavanittj Nontivich , Panha Somsak , Cheewatham Cheewapap , Hamada Yuzuru
Published: December 2006

In January and March of 2005, we conducted surveys of long‐tailed macaques at Piak Nam Yai Island, Laem Son National Park (9° N 34–35′, 98° E 28′), Ranong Province, situated in southern Thailand. Two of the three troops of long‐tailed macaques found on the island were observed using axe‐shaped stones to crack rock oysters, detached gastropods (Thais tissoti, Petit, 1852), bivalves (Gafrarium divaricatum, Gmelin, 1791), and swimming crabs (Thalamita danae, Stimpson, 1858). They smashed the shells with stones that were held in either the left or right hand, while using the opposite hand to gather the oyster meat. Some monkeys used both hands to handle the stones. According to Matsuzawa's 1996 hierarchical classification of tool usage (levels 0–3), the tool usage by Thai long‐tailed macaques could be characterized as either level 1 (cracking rock oysters with stones) or level 2 (cracking drifting mollusks and crabs with stones by placing them on a rock). Our discovery of stone‐tool usage by Thai long‐tailed macaques provides a new point of reference for discussions regarding the evolution of tool usage and the material culture of primates. Am. J. Primatol. 69:1–7, 2007. © 2006 Wiley‐Liss, Inc.
Which senses play a role in nonhuman primate food selection? A comparison between squirrel monkeys and spider monkeys
Authors: Laska Matthias , Freist Pamela , Krause Stephanie
Published: December 2006

In order to optimize foraging efficiency and avoid toxicosis, animals must be able to detect, discriminate, and learn about the predictive signals of potential food. Primates are typically regarded as animals that rely mainly on their highly developed visual systems, and little is known about the role that the other senses may play in food selection. It was therefore the aim of the present study to assess which senses are involved in the evaluation of food by two species of New World primates: the squirrel monkey and the spider monkey. To this end, six animals per species were repeatedly presented with both familiar and novel food items, and their behavior was videotaped and analyzed. To obtain a further indication of the relative importance of visual and chemosensory cues, the animals were also presented with familiar food items that were experimentally modified in color, odor, or both color and odor. The results demonstrate that squirrel monkeys and spider monkeys use olfactory, gustatory, and tactile cues in addition to visual information to evaluate novel food, whereas they mainly inspect familiar food items visually prior to consumption. Our findings also show that in both species the use of nonvisual cues decreased rapidly with repeated presentations of novel food, suggesting a fast multimodal learning process. Further, the two species clearly differ in their relative use of nonvisual cues when evaluating novel or modified food, with spider monkeys relying more on olfactory cues than squirrel monkeys, and squirrel monkeys relying more on tactile cues compared to spider monkeys. Am. J. Primatol. 69:1–13, 2007. © 2006 Wiley‐Liss, Inc.
Age‐specific functions of Stone Handling, a solitary‐object play behavior, in Japanese Macaques (Macaca fuscata)
Authors: Nahallage Charmalie A.D. , Huffman Michael A.
Published: December 2006

Stone handling (SH) in Japanese macaques, a form of solitary‐object play, is newly acquired only by young individuals, and is the first example of a directly nonadaptive behavior that is maintained as a behavioral tradition within free‐ranging provisioned social troops. We report here the first systematic investigation of this behavior in a stable captive social troop, the Takahama troop, which is housed in an outdoor enclosure of the Primate Research Institute (PRI), Kyoto University, Japan. This study was conducted to evaluate relevant competing hypotheses regarding the function of object play (e.g., misdirected foraging behavior and motor training) to explain the proximal causes and ultimate function(s) of SH. The “misdirected foraging behavior” hypothesis can be ruled out because of the lack of a clear temporal relationship between feeding and the occurrence of SH in any age class. Age‐related differences in SH performance and behavioral patterns were observed, suggesting possible differences in the immediate cause and ultimate function between young and adults. Young individuals engaged in frequent bouts of short duration, involving locomotion and vigorous body actions throughout the day, which is typical for play by young in general. This pattern of behavior is consistent with the motor training hypothesis, which states that play occurs during the development of motor and perceptual skills and is thus potentially critical for neural and cognitive development. This practice is continued by those who acquire it at an early age, with adults engaging in significantly fewer but longer bouts that involve more stationary, complex manipulative patterns, almost exclusively in the late afternoon. We propose that for adults, at the proximate level SH is psychologically relaxing, but ultimately functions to maintain and regenerate neural pathways, and potentially helps to slow down the deterioration of cognitive function associated with advanced age in long‐lived provisioned and captive macaques. Am. J. Primatol. 69:1–15, 2007.© 2006 Wiley‐Liss, Inc.
Call diversity of wild male orangutans: a phylogenetic approach
Authors: Ross Marina Davila , Geissmann Thomas
Published: December 2006

Over the past 20 years several studies have attempted to clarify orangutan systematics based on DNA sequences and karyological and morphological data; however, the systematic and phylogenetic relationships among orangutan taxa remain controversial. Surprisingly, few systematic studies have used data from wild‐living orangutans of exactly known provenance. Furthermore, most of these studies pooled data from huge geographic areas in their analyses, thus ignoring possibly distinct subpopulations. This study represents a new approach to orangutan systematics that uses orangutan long calls. Long calls are species‐specific vocalizations used by many nonhuman primates, and data on their acoustical and temporal structures have been used to assess the relationships among, and phylogenies of, several primate taxa. Altogether, 78 long calls from wild‐living orangutans from five populations in Borneo and five in Sumatra were included in the analyses. Aside from the chiefly paraphyletic topology of cladistic results, which neither support nor reject a Borneo‐Sumatra dichotomy, bootstrap values support three monophyletic clades (northwest Borneo, northeast‐east Borneo, and Ketambe) that corroborate geographic groups. The shortest trees and multivariate analyses provide some support for a closer relationship between Sumatran and specific Bornean demes than between particular Bornean demes themselves, indicating that conservation management should be based on orangutans from different populations rather than on just the two island‐specific groups. Am. J. Primatol. 69:1–20, 2007. © 2006 Wiley‐Liss, Inc.
Ground‐nesting by the chimpanzees of the Nimba Mountains, Guinea: environmentally or socially determined?
Authors: Koops Kathelijne , Humle Tatyana , Sterck Elisabeth H. M. , Matsuzawa Tetsuro
Published: December 2006

The chimpanzees (Pan troglodytes verus) of the Nimba Mountains, Guinea, West Africa, commonly make both elaborate (“night”) and simple (“day”) nests on the ground. In this study we investigated which factors might influence ground‐nesting in this population, and tested two ecological hypotheses: 1) climatic conditions, such as high wind speeds at high altitudes, may deter chimpanzees from nesting in trees; and 2) a lack of appropriate arboreal nesting opportunities may drive the chimpanzees to nest on the ground. In addition to testing these two hypotheses, we explored whether ground‐nesting is a sex‐linked behavior. Data were collected monthly between August 2003 and May 2004 along transects and ad libitum. To identify the sex of ground‐nesting individuals, we used DNA extracted from hair samples. The results showed that the occurrence and distribution of ground nests were not affected by climatic conditions or a lack of appropriate nest trees. Support was found for the notion that ground‐nesting is a sex‐linked behavior, as males were responsible for building all of the elaborate ground nests and most of the simple ground nests sampled. Elaborate ground nests occurred mostly in nest groups associated with tree nests, whereas simple ground nests usually occurred without tree nests in their vicinity. These results suggest that ground‐nesting may be socially, rather than ecologically, determined. Am. J. Primatol. 69:1–13, 2007. © 2006 Wiley‐Liss, Inc.
Radiographic evaluation of neonatal skeletal development inCallimico goeldiireveals closer similarity toCallithrix jacchusthan toSaguinus oedipus
Authors: Hofmann Maria Ines , Schradin Carsten , Geissmann Thomas
Published: December 2006

The phylogenetic affinities of the neotropical Goeldi's monkey (Callimico goeldii) have long been a matter of debate. Whereas most morphological evidence appears to placeCallimicoin a sister group position relative to the Callitrichidae, genetic studies placeC. goeldiiwithin the Callitrichidae and suggest that it is more closely related to marmosets than to tamarins. The present study presents the first radiographic analysis comparing the secondary limb bone ossification of newbornC. goeldiiwith representatives of the marmosets (Callithrix jacchus) and tamarins (Saguinus oedipus). The state of secondary ossification of the epiphysis and short bones is classified into three different ontogenetic stages. Our results reveal that in terms of the number of ossification centers,C. goeldiiis significantly closer toC. jacchusthan toS. oedipus. This is the first morphological study to support the findings of molecular studies, and the results suggest thatC. goeldiiis more closely related to marmosets than to tamarins. Am. J. Primatol. 69:1–14, 2007. © 2006 Wiley‐Liss, Inc.
Dispersion of graphite nanosheets in polymer resins via masterbatch technique
Authors: Chen Guohua , Chen Xiangfeng , Wang Haiquan , Wu Dajun
Published: December 2006

The dispersion of graphite nanosheets (GNs) in polymer matrices via the masterbatch technique was investigated. Modifying resin was added to GNs to prepare blend which is designated as the masterbatch. Such masterbatches, containing 70–80 wt % of GN filler, were blended with target polymers via melt extrusion process to prepare polymer/GN nanocomposites. The extruded nanocomposites showed characteristic conducting percolation behaviors with the percolation thresholds mainly dependent on the miscibility of the modifying resin with polymer matrix. The percolation thresholds of AS (Acrylonitrile‐Styrene compolymer)/GN and high‐density polyethylene (HDPE)/GN nanocomposites prepared by this technique were about 9 and 14 wt % of GN, respectively. Scanning electron microscopy and other characterizations showed that the GNs were well dispersed in AS and HDPE resins. The extrusion process and compatibility of the modifying resin with target polymer proved to be important factors for the homogeneity of the nanodispersion. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3470–3475, 2007
Effect of ethylene ionomers on the properties of crosslinked polyethylene
Authors: Ke Qingquan , Huang Xingyi , Wei Ping , Wang Genlin , Jiang Pingkai
Published: December 2006

Most premature failure of underground crosslinked polyethylene (XLPE) cables in service, a matter of great concern, is due to aging induced by water treeing. To improve the water‐tree resistance, sodium‐neutralized poly (ethylene‐co‐acrylic acid) (EAA–Na) ionomers were blended with XLPE; the EAA–Na ionomers were prepared through the neutralization of sodium hydroxide and poly(ethylene‐co‐acrylic acid). A series of XLPE/EAA–Na ionomer blends were investigated through the measurement of the water absorption ratio, water treeing, and mechanical and dielectric testing; the results strongly suggested that EAA–Na ionomers could improve the water‐tree resistance of XLPE, and the XLPE/EAA–Na blends retained excellent mechanical properties and dielectric properties. Moreover, through the characterization of XLPE/EAA–Na blends with Fourier transform infrared spectrometry, dynamic mechanical analysis, and scanning electron microscopy, it was found that the neutralization reaction could be achieved completely; the XLPE and EAA–Na ionomers were partially compatible, so the EAA–Na ionomers could be dispersed well in the matrix with the process examined in this study. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3483–3490, 2007
Rheological behavior of polypropylene/layered silicate nanocomposites prepared by melt compounding in shear and elongational flows
Authors: Hwan Lee Seung , Cho EunNaRi , Ryoun Youn Jae
Published: December 2006

Melt rheology and processability of exfoliated polypropylene (PP)/layered silicate nanocomposites were investigated. The nanocomposites were prepared by melt compounding process in the presence or absence of a PP‐based maleic anhydride compatibilizer. PP/layered silicate nanocomposites showed typical rheological properties of exfoliated nanocomposites such as nonterminal solid‐like plateau behavior at low frequency region in oscillatory shear flow, higher steady shear viscosity at low shear rate region, and outstanding strain hardening behavior in uniaxial elongational flow. The melt processability of exfoliated PP/layered silicate nanocomposites was significantly improved due to good dispersion of layered silicates and increased molecular interaction between the PP matrix and the layered silicate organoclay. Small‐angle X‐ray scattering and transmission electron microscopy results revealed that the layered silicate organoclay was exfoliated and good interaction between PP matrix and organoclay was achieved by using the PP‐g‐MAH compatibilizer. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3506–3515, 2007
Columnar Mesophase Formation of Cyclohexa‐m‐phenylene‐Based Macrocycles
Authors: Pisula Wojciech , Kastler Marcel , Yang Changduk , Enkelmann Volker , Müllen Klaus
Published: December 2006

Two novel discotic macrocycles, substituted cyclohexa‐m‐phenylene (CHP) and cyclo‐3,6‐trisphenanthrylene (CTP), and the linear oligomer 3,3′:6′,3′′‐terphenanthrene (TP) as a model substance have been synthesized by repetitive cross‐coupling reactions. To correlate the molecular design with the supramolecular architecture and the established macroscopic order, 2D wide‐angle X‐ray scattering experiments were performed on mechanically extruded filaments. At room temperature in their crystalline phases, all three compounds revealed columnar assemblies in which the macrocycles self‐organized by π‐stacking interactions. The degree of macroscopic order was found to depend upon the planarity and stiffness of the aromatic core. The flexible CHP ring showed a poor macroscopic order of the columnar structures and a low isotropization temperature, whereas the more‐planar, less‐flexible CTP self‐assembled into well‐defined superstructures. The larger π‐stacking area and the more‐pronounced intermolecular interactions for CTP led to the formation of a mesophase over a very large temperature range. The surprising columnar organization of the “open” TP system was explained by back‐folding of the molecule into a ringlike structure.
Salvage hepatic resection after incomplete interstitial therapy for primary and secondary liver tumours
Authors: Torzilli G , Del Fabbro D , Palmisano A , Marconi M , Makuuchi M , Montorsi M
Published: December 2006

Background

When the response to percutaneous ablation therapy (PAT) of liver tumours is incomplete, surgery may be undertaken as a salvage therapy. To validate the safety and effectiveness of salvage hepatectomy, patients who had undergone PAT or no treatment before hepatectomy were compared.

Methods

Of 137 patients who had hepatectomy for primary and secondary tumours, 21 had undergone PAT and 116 had surgery as primary treatment. Tumour features and the incidence of liver cirrhosis were similar in the two groups.

Results

Peroperative mortality and major morbidity rates were zero and 5 per cent (one of 21) respectively among patients who had PAT before surgery, and 0·9 per cent (one of 116) and zero in those who did not. Duration of operation (mean 495 versus 336 min; P < 0·001), clamping time (mean 81 versus 53 min; P < 0·001), blood loss (mean 519 versus 286 ml; P = 0·004), need for blood transfusion (six of 21 patients versus nine of 116; P = 0·001), and rates of thoracophrenolaparotomy (eight of 21 versus 14 of 116; P < 0·001) and resection of other tissues (six of 21 versus nine of 116; P < 0·001) were significantly higher in the PAT group.

Conclusion

Hepatectomy after incomplete PAT is safe and effective, but more extensive procedures are necessary. The effect of salvage hepatectomy on long-term outcome is still unclear.
Selective Chemisorption of Carbon Monoxide by Organic–Inorganic Hybrid Materials Incorporating Cobalt(III) Corroles as Sensing Components
Authors: Barbe Jean‐Michel , Canard Gabriel , Brandès Stéphane , Guilard Roger
Published: December 2006

Twenty‐one hybrid materials incorporating cobalt(III) corrole complexes were synthesized by a sol–gel process or by grafting the metallocorrole onto a mesostructured silica of the SBA‐15 type. All the materials show an almost infinite selectivity for carbon monoxide with respect to dinitrogen and dioxygen in the low‐pressure domain where the chemisorption phenomenon is predominant. This peculiar property is of prime importance for an application as a CO sensor. The selectivity slightly decreases at high pressures where nonselective physisorption phenomena mainly occur. The percentage of active sites for CO chemisorption ranges from 22 to 64 %. This low percentage may be attributable to interactions between the cobalt(III) corroles with silanol or siloxane groups remaining at the surface of the materials which prevent further coordination of the CO molecule. Notably, the most efficient materials are those prepared in the presence of a protecting ligand (pyridine) during the gelation or the grafting process. The removal of this ligand after the gelation process releases a cavity around the cobalt ion that favors the coordination of a carbon monoxide molecule. The CO adsorption properties of the SBA‐15 hybrid were not affected over a period of several months thus indicating a high stability of the material. Conversely, the xerogel capacities slowly decrease owing to the evolution of the material structure.
Biaryls Made Easy: PEPPSI and the Kumada–Tamao–Corriu Reaction
Authors: Organ Michael G. , Abdel‐Hadi Mirvat , Avola Stephanie , Hadei Niloufar , Nasielski Joanna , O'Brien Christopher J. , Valente Cory
Published: December 2006

An easily employed, highly versatile Kumada–Tamao–Corriu (KTC) protocol utilizing the PEPPSI (Pyridine, Enhanced, Precatalyst, Preparation, Stabilization and Initiation) precatalysts 1 and 2 is detailed. The ease‐of‐use of these catalysts and the synthesis of a wide range of hindered biaryls, large coupling partners and drug‐like heterocycles, in high yield, makes the PEPPSI‐KTC protocol very attractive. The high reactivity of the PEPPSI system allowed a tetra‐ortho‐substituted heterocycle, 11 to be synthesized at room temperature for the first time using any protocol. The PEPPSI protocols also tolerated the Boc protecting group and phenols required no protection in modified conditions. A relatively large scale (10 g) reaction was also performed with no loss in performance. Furthermore, PEPPSI‐IPr, 1, was compared to previously reported highly active phosphine ligands 42, 43, and 44 and was shown to result in significantly better yields under identical conditions. Finally, we demonstrated that the PEPPSI catalyst system is very adept at performing sequential KTC coupling reactions, analogous to multicomponent reactions, which allow complex polyaryl and polyheteroaryl architectures to be produced in one single operation.
Neutron Diffraction Studies of U4O9: Comparison with EXAFS Results.
Authors: Garrido F. , Hannon A. C. , Ibberson R. M. , Nowicki L. , Willis B. T. M.
Published: December 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.
Crystal Structure of NbOBr2.
Authors: Beck Johannes , Kusterer Christian
Published: December 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 Remarkable Reaction of N2O with a Binary Component Lanthanide Oxide Mixture.
Authors: Harrington M. T. , Brennan E. , Wenger J. C. , Morris M. A.
Published: December 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.
Water Splitting into H2 and O2 over Ba5Nb4O15 Photocatalysts with Layered Perovskite Structure Prepared by Polymerizable Complex Method.
Authors: Miseki Yugo , Kato Hideki , Kudo Akihiko
Published: December 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.
Nd5(AsO3)4Cl3: The First Oxo‐Arsenate(III)‐Chloride of the Lanthanides.
Authors: Ben Hamida Makram , Wickleder Mathias S.
Published: December 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.
Evolution of Polyoxoniobate Cluster Anions.
Authors: Bontchev Ranko P. , Nyman May
Published: December 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.
Di‐(R,R)‐1‐ [10‐(1‐hydroxy‐2,2,2‐trifluoroethyl)‐9‐anthryl]‐2,2,2‐trifluoroethyl Muconate: A Highly Chiral Cavity for Enantiodiscrimination by NMR.
Authors: Palomino‐Schaetzlein Martina , Virgili Albert , Gil Sergio , Jaime Carlos
Published: December 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.
Asymmetric Michael Reaction of Malonate Derivatives with α,β‐Unsaturated Ketones Using Chiral Quaternary Ammonium Salts.
Authors: Cho Min Je , Cho Myoung Gi , Huh Sun Chul , Kim Sung Min , Lee Kilsung , Koh Kwang Oh , Mang Joo Yang , Kim Dae Young
Published: December 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.
Chiral Phosphino‐ and (Phosphinooxy)‐Substituted N‐Heterocyclic Carbene Ligands and Their Application in Iridium‐Catalyzed Asymmetric Hydrogenation.
Authors: Nanchen Steve , Pfaltz Andreas
Published: December 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.
Highly Efficient Asymmetric Michael Addition of Aldehydes to Nitroalkenes Catalyzed by a Simple trans‐4‐Hydroxyprolylamide.
Authors: Palomo Claudio , Vera Silvia , Mielgo Antonia , Gomez‐Bengoa Enrique
Published: December 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.
Behavior of 3‐Benzylamino‐5‐aryl‐2(3H)‐furanones Towards Some Nitrogen Nucleophiles.
Authors: Kandeel Kamal A. , Youssef Ahmed S. A. , Abou‐Elmagd Wael S. I. , Hashem Ahmed I.
Published: December 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.
Reductive Cyclization of Diynes and Enynes Catalyzed by Allyl Platinum N‐Heterocyclic Carbene Complexes.
Authors: Jung Il Gu , Seo Junhyeok , Lee Sang Ick , Choi Soo Young , Chung Young Keun
Published: December 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‐Mediated Functionalization of Heteroaromatic Cations: Comparative Study on Quinolizinium Cations.
Authors: Garcia‐Cuadrado Domingo , Cuadro Ana M. , Barchin Bernardo M. , Nunez Ana , Caneque Tatiana , Alvarez‐Builla Julio , Vaquero Juan J.
Published: December 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 and Selective Oxidation of Alcohols to Aldehydes and Ketones Using NaIO4/TEMPO/NaBr System under Acidic Conditions.
Authors: Lei Ming , Hu Rui‐Jun , Wang Yan‐Guang
Published: December 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.
Aluminum Triflate: An Efficient Recyclable Lewis Acid Catalyst for the Aminolysis of Epoxides.
Authors: Williams D. Bradley G. , Lawton Michelle
Published: December 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.
Layered Double Hydroxide‐Supported Nanoplatinum: An Efficient and Reusable Ligand‐Free Catalyst for Heck and Stille Coupling of Iodoarenes.
Authors: Kantam M. Lakshmi , Roy Moumita , Roy Sarabindu , Subhas M. S. , Sreedhar Bojja , Choudary B. M.
Published: December 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.
ZnO as a New Catalyst for N‐Formylation of Amines under Solvent‐Free Conditions.
Authors: Hosseini‐Sarvari Mona , Sharghi Hashem
Published: December 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.
Solvolysis of Benzyl Alcohols and Ethers in 1,2‐Diols and Application to a Deprotection of Benzyl Ether‐Type Protecting Groups.
Authors: Miyake Hideyoshi , Fujimura Masahiro , Tsumura Takatsugu , Sasaki Mitsuru
Published: December 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 2‐Acylaziridines by Acid Chlorides.
Authors: Kim Yongeun , Ha Hyun‐Joon , Yun Hoseop , Lee Baeck Kyoung , Lee Won Koo
Published: December 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.
Highly Enantioselective 1,2‐Additions of Various Organolithium Reagents to Aldehydes.
Authors: Granander Johan , Eriksson Jonas , Hilmersson Goeran
Published: December 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 Selective Hydroarylation of Styrenes with Electron‐Rich Arenes, Catalyzed by Bismuth(III) Chloride and Affording Markovnikov Adducts.
Authors: Sun Hong‐Bin , Li Biao , Hua Ruimao , Yin Yingwu
Published: December 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 Asymmetric Allylic Alkylation Using Ephedrine‐Derived Phosphinooxazolidines.
Authors: Jin Myung‐Jong , Sarkar M. S. , Jung Ji‐Young , Lee Dong‐Hwan , Lee Ik‐Mo
Published: December 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 [4 + 1] Annulation Reactions with Silyl Vinylketenes Derived from Fischer Carbene Complexes.
Authors: Moser William H. , Feltes Laura A. , Sun Liangdong , Giese Matthew W. , Farrell Ryan W.
Published: December 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.
Unexpected Reactions of [60]Fullerene Involving Tertiary Amines and Insight into the Reaction Mechanisms.
Authors: Wang Guan‐Wu , Chen Xiao‐Ping , Cheng Xin
Published: December 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 4‐Aryl‐5,5‐dimethyl‐5H‐1,2,3‐triazoles and 4‐Aryl‐3‐cyano‐5,5‐dimethyl Δ1‐Pyrazolines by Cycloaddition of 2‐Diazopropane with Iminoethers and Propenenitriles.
Authors: Toumi Baya , Harizi Abdallah
Published: December 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 and Biological Activity of Novel 1‐(2,3,4‐Trimethoxyphenyl)‐2‐{ [5‐(3,4,5‐trimethoxyphenyl)‐1,3,4‐thiadiazol‐2‐yl]thio}ethanone Oxime Ester Derivatives.
Authors: Xue Wei , Song Baoan , He Wei , Wang Hua , Yang Song , Jin Linhong , Hu Deyu , Liu Gang , Lu Ping
Published: December 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.
π‐Aryl/Heteroaryl Conjugated Coumarin‐Thiazoles: Synthesis, Optical Spectral and Nonlinear Optic Properties.
Authors: Mashraqui Sabir H. , Mistry Hitesh , Sundaram Subramanain
Published: December 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.
O‐Arylation versus C‐Arylation: Copper‐Catalyzed Intramolecular Coupling of Aryl Bromides with 1,3‐Dicarbonyls.
Authors: Fang Yewen , Li Chaozhong
Published: December 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.
3‐Nitrochromene Derivatives as 2π Components in 1,3‐Dipolar Cycloadditions of Azomethine Ylides.
Authors: Viranyi Andrea , Marth Gabriella , Dancso Andras , Blasko Gabor , Toeke Laszlo , Nyerges Miklos
Published: December 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 Green and Straightforward Synthesis of 4′‐Substituted Terpyridines.
Authors: Winter Andreas , van den Berg Antje M. J. , Hoogenboom Richard , Kickelbick Guido , Schubert Ulrich S.
Published: December 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 Multi‐Component Reaction for the Synthesis of N‐Substituted Furo[3,4‐b]quinoline Derivatives under Microwave Irradiation.
Authors: Tu Shujiang , Zhang Yan , Jia Runhong , Jiang Bo , Zhang Junyong , Ji Shunjun
Published: December 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 Novel 2‐Amino‐6,8‐dithioxopurine Derivatives.
Authors: Ikaunieks Martins , Belyakov Sergey , Madre Marina
Published: December 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.
Original Synthesis of α‐Chloroketones in Azaheterocyclic Series Using TDAE Approach.
Authors: Montana Marc , Terme Thierry , Vanelle Patrice
Published: December 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.
Strategies for Expanding Structural Diversity Available from Olefin Isomerization—Claisen Rearrangement Reactions.
Authors: Stevens Benjamin D. , Bungard Christopher J. , Nelson Scott G.
Published: December 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.
Gold‐Catalyzed Intramolecular Allylation of Silyl Alkynes Induced by Silane Alcoholysis.
Authors: Park Sangho , Lee Daesung
Published: December 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(0)‐Catalyzed Highly Regio‐ and Stereoselective Addition of Organoboronic Acids with 1,2‐Allenylphosphonates Forming Tri‐ or Tetrasubstituted 1(E)‐Alkenylphosphonates.
Authors: Ma Shengming , Guo Hao , Yu Fei
Published: December 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.
New Compounds from Commiphora myrrha (Nees) Engl.
Authors: Ahmed F. , Ali M. , Singh O.
Published: December 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.
Pteratides I—IV, New Cytotoxic Cyclodepsipeptides from the Malaysian Basidiomycete Pterula sp.
Authors: Chen Chien‐Hui , Lang Gerhard , Mitova Maya I. , Murphy Annabel C. , Cole Anthony L. J. , Din Laily B. , Blunt John W. , Munro Murray H. G.
Published: December 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.
Chemical Constituents of Tupistra chinensis Rhizomes.
Authors: Pan Wen‐Bin , Wei Li‐Mei , Wei Li‐Lan , Wu Yang‐Chang
Published: December 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.
Isolation and Biomimetic Synthesis of Antiinflammatory Stilbenolignans from Gnetum cleistostachyum.
Authors: Yao Chun‐Suo , Lin Mao , Wang Lin
Published: December 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.
Tritium in Catalysis
Authors: Jones John R. , Lu Shui‐Yu
Published: December 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 Synthetic Potential of SET Photochemistry of Silicon‐Substituted Polydonor‐Linked Phthalimides
Authors: Yoon Ung Chan , Mariano Patrick S.
Published: December 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.
“Click Peptides” — Chemical Biology‐Oriented Synthesis of Alzheimer′s Disease‐Related Amyloid β Peptide (Aβ) Analogues Based on the “O‐Acyl Isopeptide Method”
Authors: Sohma Youhei , Kiso Yoshiaki
Published: December 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.
Five‐Membered Heterocycles with Vicinal Te and O Heteroatoms
Authors: Sadekov Igor D. , Abakarov Gasan M. , Minkin Vladimir I.
Published: December 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 Chemistry of Thienopyrimidines
Authors: Litvinov V. P.
Published: December 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 Literature of Heterocyclic Chemistry. Part 9. 2002—2004
Authors: Belen'kii L. I. , Gramenitskaya V. N. , Evdokimenkova Yu. B.
Published: December 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.
Sequence and Structural Deteminants of Amyloid Fibril Formation
Authors: Bemporad Francesco , Calloni Giulia , Campioni Silvia , Plakoutsi Georgia , Taddei Niccolo , Chiti Fabrizio
Published: December 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.
Chromatographic Analysis of Insecticides Chlorinated Compounds in Water and Soil
Authors: Maione Michela , Mangani Filippo
Published: December 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.
Theoretical Study on the Structures and Properties of Hydrogen Bonding Complexes between Diazines and Water
Authors: Li Quan , Huang Fang‐Qian , Hu Jing‐Dan , Zhao Ke‐Qing
Published: December 2006

Density functional theory B3LYP method and second‐order Moller‐Plesset perturbation theory MP2 method were employed to obtain the optimized geometries of the ground state and interaction energy for diazines and water complexes. The results show that the ground state complexes have strong hydrogen bonding interaction with −20.99, −16.73 and −15.31 kJ/mol after basis set superposition error and zero‐point vibration energy correction for pyridazine‐water, pyrimidine‐water and pyrazine‐water, respectively, and large red‐shift for the symmetric H–O stretching vibration frequencies due to the formation of N···H–O hydrogen bond in the diazine‐water complexes. The NBO analysis indicates that intermolecular charge transfer are 0.0316, 0.0255 and 0.0265 e respectively. In addition, the first singlet (n,π*) vertical excitation energy of the monomer and the hydrogen bonding complexes between diazines and water was investigated by time‐dependent density functional theory.
Halogen Bonding: An AIM Analysis of the Weak Interactions
Authors: Zou Jian‐Wei , Lu Yun‐Xiang , Yu Qing‐Sen , Zhang Hua‐Xin , Jiang Yong‐Jun
Published: December 2006

A series of complexes formed between halogen‐containing molecules and ammonia have been investigated by means of the atoms in molecules (AIM) approach to gain a deeper insight into halogen bonding. The existence of the halogen bond critical points (XBCP) and the values of the electron density (ρb) and Laplacian of electron density (Δ2ρb) at the XBCP reveal the closed‐shell interactions in these complexes. Integrated atomic properties such as charge, energy, polarization moment, volume of the halogen bond donor atoms, and the corresponding changes (Δ) upon complexation have been calculated. The present calculations have demonstrated that the halogen bond represents different AIM properties as compared to the well‐documented hydrogen bond. Both the electron density and the Laplacian of electron density at the XBCP have been shown to correlate well with the interaction energy, which indicates that the topological parameters at the XBCP can be treated as a good measure of the halogen bond strength. In addition, an excellent linear relationship between the interatomic distance d(X···N) and the logarithm of ρb has been established.
Non‐Isothermal Decomposion Kinetics of Supermolecule Compound [Eu(C10H9N2O4)(C10H8N2O4)(H2O)3]2·phen·4H2O
Authors: Yang Rui , He Shui‐Yang , Wu Wang‐Ting , Chen Feng‐Ying , Zhu Rong‐Zu
Published: December 2006

Europium(III) compound with 2‐oxopropionic acid salicyloyl hydrazone (C10H10N2O4, H3L) and 1,10‐phenanthroline (C12H8N2, phen) has been prepared. A yellow prismatic crystal of the compound was obtained, and the molecule crystallized in the triclinic space group P‐1. There are two 9‐coordinated complex molecules in every structure unit, where every Eu atom is coordinated by three water molecules and two tridentate C10H10N2O4 ligands, forming two stable pentacycles. The coordination polyhedron around Eu3+ was described as a single cap square antiprism. In the crystal cell, there are one free 1,10‐phenanthroline and four water molecules. The thermal decomposition of the compound and its kinetics were studied by non‐isothermal thermogravimetry. The Kissinger′s method and Ozawa′s method were used to calculate the activation energy value of the first‐step decomposition. The stages of the decompositions were identified by TG‐DTG‐DSC curve. The non‐isothermal kinetic data were analyzed by means of integral and differential methods. The possible reaction mechanism and the kinetic equations were investigated by comparing the kinetic parameters.
An Expedient Method for the Synthesis of Thiosemicarbazones under Microwave Irradiation in Solvent‐free Medium
Authors: Li Jian‐Ping , Zheng Peng‐Zhi , Zhu Jun‐Ge , Liu Rui‐Jie , Qu Gui‐Rong
Published: December 2006

A simple, efficient and eco‐friendly method for the synthesis of thiosemicarbazones from thiosemicarbazides and aldehyde under microwave irradiation has been reported, and no solvent and catalyst were used. And the technique of microwave irradiation coupled with solvent‐free condition proved to be a quite valuable method in the organic synthesis.