bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis, NMR characterization and reactivity of 1-silacyclohex-2-ene derivatives
Authors: Khan Ezzat , Wrackmeyer Bernd 
Published: July 2012

Abstract
The chloro functionality of allyldichlorosilane (HSiCl2(C3H5)) and allyldichloromethylsilane (MeSiCl2(C3H5)) were replaced by alkynyl groups and new compounds, allyldialkynylsilane 1 and allyldialkynylmethylsilane 2, were obtained. These silanes, which served as starting materials for the onward reactions, were purified by fractional distillation. They were further subjected to hydroboration with 9-BBN (9-borabicyclo[3.3.1]nonane) and were converted into 1-silacyclohex-2-ene derivatives 5 and 6. The competition between C≡C and C=C in the reaction was studied. The hydroborating reagent 9-BBN was expected to prefer terminal C=C bonds and to leave C≡C bond untouched. This hypothesis of preferable hydroboration was experimentally proved, and hence, 1-silacyclohex-2-ene derivatives were obtained in reasonably pure form. The reaction of allyldialkynylsilane 2 with one equivalent of 9-BBN affords 1-silacyclohex-2-ene bearing Si-C≡C-function, ready to be hydroborated further with one equivalent of 9-BBN. The obtained compound bears two C-B bonds, which are attractive synthones for further transformations. This study aims to highlight the chemistry of C-B and Si-H functional groups. All new compounds obtained were colorless air and moisture sensitive oils, and they were studied by multinuclear magnetic resonance spectroscopy (1H, 13C, 11B, 29Si NMR) in solution.
C12: The building block of hexagonal diamond
Authors: Banfalvi Gaspar 
Published: July 2012

Abstract
The crystalline structure of diamond may consist of C8, C10 or C12 building units. C8 was regarded as the building block of the hexagonal diamond also known as Lonsdaleite. Adamantane (C10H16) alicyclic hydrocarbon has the same arrangement of carbon atoms as the basic C10 unit of the cubic diamond lattice. C12 has five rings of mixed type, three of them in boat, two in chair conformation. Model building revealed that the C8 unit containing exclusively three rings in boat conformation does not exist. Further addition of carbon atoms to C8: a) results in C12 unit, b) allows the multiplication of C12 units, and c) by reducing the boat-to-chair ratio explains the hardness of the hexagonal diamond Lonsdaleite. The Lonsdaleite nucleus can be grown to special diamond grains with the outer atoms of the C12 building units replaced by different elements. This recognition can be utilized in the production of synthetic diamonds under high-pressure high-temperature conditions or in the chemical vapor deposition growth technique.
Influence of different templates on the morphology of mesoporous aluminas
Authors: Berger Daniela , Traistaru Gina , Matei Cristian 
Published: July 2012

Abstract
Mesoporous alumina has many environmental applications as catalysts support and adsorption or separation material. We studied the synthesis conditions for the mesoporous alumina formation from aluminum isopropoxide in the presence of anionic (lauric and stearic acid), cationic (cetyltrimethylammonium bromide, CTAB) and non-ionic (triblock poly(ethylene oxide)-poly(propylene oxide)-polyethyleneoxide, P123) templates. The X-ray diffraction data show that the alumina mesophases obtained at 550°C in the presence of fatty acids or P123 have amorphous walls, whereas the samples prepared at 500°C by using CTAB, in alkaline medium are crystalline with a γ-alumina structure. The solvothermal treatment caused the alumina mesophase with crystalline walls to be obtained at 550°C. The samples were investigated by nitrogen adsorption-desorption isotherms and scanning electron microscopy. The obtained alumina mesophases have specific surface areas in the range of 300–450 m2 g−1, narrow pore size distribution, and different morphology depending on the template used in the synthesis.
α-Amino acid-derived 2-phenylimidazoles with potential antimycobacterial activity
Authors: Cvejn Daniel , Klimešová Věra , Bureš Filip 
Published: July 2012

Abstract
α-Amino acid-derived 2-phenylimidazole derivatives were designed, synthesized, and further investigated as potential antimycobacterial agents. The synthesis of target imidazole derivatives involved the transformation of Cbz-protected α-amino acids (Ala, Val, Phe, Leu, iLe, and Pro) into α-diazoketones and α-bromoketones, respectively. Subsequent treatment of α-bromoketones with (4-nitro)benzamidine afforded imidazole derivatives bearing α-amino acid residue appended to the imidazole C4 and (4-nitro)phenyl ring in the position C2. Antimycobacterial activities of both series of compounds against M. tuberculosis, M. avium, and M. kansasii were screened and basic structure-activity relationships were further evaluated.
Examination of distribution of trace elements in hair, fingernails and toenails as alternative biological materials. Application of chemometric methods
Authors: Przybylowicz Agnieszka , Chesy Paulina , Herman Malgorzata , Parczewski Andrzej , Walas Stanislaw , Piekoszewski Wojciech 
Published: July 2012

Abstract
The aim of this study was to find correlations between several studied elements and analyzed materials as well as the application and validation of an analytical method to determine trace elements in hair, fingernails and toenails of healthy volunteers (normal concentration). The method developed covers washing, mineralization and ICP-MS determination of 10 elements (Ca, Cd, Co, Cr, Cu, Fe, Mg, Ni, Pb and Zn) in hair and nails. Concentrations of the selected elements in hair, fingernails and toenails were measured for 24 women and 18 men. Furthermore, a chemometric approach (Principal Component Analysis, PCA) was employed to evaluate the correlations between concentrations of the elements in hair and nails and between these materials. Until now PCA has not been frequently applied in handling and interpretation of the results of analysis of biological materials. However, the results of the present investigation show the high potential of PCA in extraction of valuable information from analytical measurements. Additionally, PCA has become a useful tool for visualization of the obtained results. Moreover, the cluster analysis (CA) was used to group the samples according to gender, taking into account two different groups of elements: essential and toxic.
Pressure induced structural phase transitions—A review
Authors: Bhardwaj Purvee , Singh Sadhna 
Published: July 2012

Abstract
The contemporary status of experimental as well as theoretical advances within the special view of structural phase transitions is reviewed. A brief outline of phase transitions and its classification is presented first. High-pressure experimental techniques developed for studying the structural phase transitions and elastic properties are reviewed. The complete set of theoretical and experimental data obtained is for the group II–IV alkaline earth chalcogenides. Here the authors review the currently used calculations and high-pressure behavior of these materials and the theoretical work that has been done on them.
Erratum to: “Prediction of properties of biodiesel-diesel blends using spectrofluorimetry and multivariate calibration”
Authors: Meira Marilena , Quintella Cristina , Pepe Iuri , Costa Neto Pedro , Santos Tanajura Alessandra , Silva Humbervânia 
Published: July 2012

Abstract
The original version of the article was published in Cent. Eur. J.Chem. 10(4) (2012) pp. 1328–1337. Unfortunately, the original version of this article contains a mistake in the affiliation section. Dr Marilena Meira’s affiliation is IFBA - Federal Institute for Education, Science and Technology, Simoes Filho, Bahia 43700-000, Brazil.
Chemometric analysis of heavy metal content for various environmental matrices in terms of their use in biomass thermal processing
Authors: Sajdak Marcin , Pieszko Celina 
Published: July 2012

Abstract
Chemometric analysis was performed to determine the heavy metal content, such as Zn, Cd, Ni, Mn, Cu, Pb, and Fe, in 36 samples of Scots Pine taken from 9 locations within the Upper Silesian Industrial Basin. The samples, after being pre-processed, were examined for the above elements through the use of atomic absorption spectroscopy (AAS). The highest concentration of heavy metals was discovered in samples from Jaworzno. Based on the concentration assessment, the relationship between element quantity, sampling location, and matrix type has been determined, and definite element group co-existence has been confirmed and described.
First-principles study of optical properties in Ca-doped ZnO alloys
Authors: Bai Li-Na , Lian Jian-She , Zheng Wei-Tao , Jiang Qing 
Published: July 2012

Abstract
Various electronic and optical properties of Zn1−x
CaxO ternary alloys of wurtzite structure are calculated using a first-principles approach based on the framework of the generalized gradient approximation to density-functional theory. In particular, on-site Coulomb interactions are introduced, which can reasonably well predict the electronic properties and band gaps of the Zn1−x
CaxO (0≤x≤0.25) system. The imaginary part of the calculated dielectric function indicates that the optical transition between O 2p states in the valence band and Zn 4s states in the conduction band shifts to the high-energy range as the Ca concentration increases. The calculated band gap shows a significant increase with increasing Ca concentration. Therefore, Zn1−x
CaxO ternary alloys may be a potential candidate alloy for optoelectronic materials, and especially for light-emitters and detectors.
Chronic renal failure as a complication of hemorrhagic fever with renal syndrome in 17 years’ old boy
Authors: Stojanovic Vesna , Doronjski Aleksandra , Spasojevic Slobodan 
Published: July 2012

Abstract
Hemorrhagic fever with renal syndrome (HFRS) is an acute infective multisystemic disease that commonly presents with fever, hemorrhage and acute renal failure. A 17-year-old boy presented with thrombocytopenia, profuse subconjunctival hemorrhage and anuric renal failure with fluid overload. The patient required continuous ambulatory peritoneal dialysis. He developed diuresis but did not recover renal function during reconvalescent period. Hantaan, Puumala, Seoul, Belgrade virus infection with haemorrhagic fever with renal syndrome was confirmed by serologic test.
Antileukemic activity of combined epigenetic agents, DNMT inhibitors zebularine and RG108 with HDAC inhibitors, against promyelocytic leukemia HL-60 cells
Authors: Savickiene Jurate , Treigyte Grazina , Borutinskaite Veronika-Viktorija , Navakauskiene Ruta 
Published: July 2012

AbstractDNMT inhibitors are promising new drugs for cancer therapies. In this study, we have observed the antileukemic action of two diverse DNMT inhibitors, the nucleoside agent zebularine and the non-nucleoside agent RG108, in human promyelocytic leukemia (PML) HL-60 cells. Zebularine but not RG108 caused dose- and time-dependent cell growth inhibition and induction of apoptosis. However, co-treatment with either drug at a non-toxic dose and all trans retinoic acid (RA) reinforced differentiation to granulocytes, while 24 or 48 h-pretreatment with zebularine or RG108 followed by RA alone or in the presence of HDAC inhibitors (sodium phenyl butyrate or BML-210) significantly accelerated and enhanced cell maturation to granulocytes. This occurs in parallel with the expression of a surface biomarker, CD11b, and early changes in histone H4 acetylation and histone H3K4me3 methylation. The application of both drugs to HL-60 cells in continuous or sequential fashion decreased DNMT1 expression, and induced E-cadherin promoter demethylation and reactivation at both the mRNA and the protein levels in association with the induction of granulocytic differentiation. The results confirmed the utility of zebularine and RG108 in combinations with RA and HDAC inhibitors to reinforce differentiation effects in promyelocytic leukemia.
In-vitro and in-vivo anti-inflammatory activity of Andrographis serpyllifolia (Rottl. Ex Vahl.) Wt.
Authors: Kandati Vasu , Govardhan P , Reddy Ch Siva , Nath A Ravinder , Reddy R R 
Published: July 2012

The study was aimed to evaluate the analgesic and anti-inflammatory activity (by both in-vitro and in-vivo) of both chloroform and methanol root extracts of Andrographis serpyllifolia (Rottl. Ex Vahl.) Wt. Methods used for the studies were In-vitro 5-Lipoxygenase inhibition assay and In-vivo measurement of rat paw edema and ear edema in rats, acetic acid induced writhing response and hot plate method in albino mice. Chloroform and methanolic extracts of A. serpyllifolia root have shown moderate potency in inhibiting 5-LOX and shown significant anti-inflammatory activity. Despite the IC50 values are little higher, anti-inflammatory efficacy of these extracts possibly due to other mechanisms apart of 5-LOX inhibition. However, In-vivo anti-inflammatory studies revealed that A. serpyllifolia methanolic extract has shown higher degree of efficacy when compared to the chloroform extract. In terms of analgesic activity in writhing test, methanolic extract has shown more efficacy than chloroform extract. Hence, it is important to isolate the active principles for further testing the anti-inflammatory efficacy.DOI: http://dx.doi.org/10.3329/icpj.v1i8.11250 International Current Pharmaceutical Journal 2012, 1(8): 199-204
Isolation and characterization of novel mucoadhesive biomaterial from Phoenix dactylifera
Authors: Ojha Abhijeet , Madhav NV Satheesh 
Published: July 2012

Phoenix dactylifera belongs to the family Arecaceae. The current aim of our research work is to isolate bio-material from the fruit pulp of Phoenix dactylifera and evaluate its mucoadhesivity. The bio- material was isolated by simple economical process. The isolated biomaterial was subjected for determination of solubility, colour changing point, viscosity, surface tension, pH and chemical tests. The mucoadhesivity of the biomaterial was assessed by shear stress method and rotating cylinder method using Capra aegagrus labium and intestine as mucosal substrates. The results were compared with HPMC and sodium CMC. The research study revealed that the biomaterial from Phoenix dactylifera exhibits promising inbuilt mucoadhesivity. So it can serve as a powerful natural mucoadhesant and may be used to develop mucoadhesive transmucosal drug delivery systems.DOI: http://dx.doi.org/10.3329/icpj.v1i8.11251 International Current Pharmaceutical Journal 2012, 1(8): 205-208
Synthesis and evaluation of sodium carboxymethyl cellulose azo polymer for colon specificity
Authors: Ojha Mini , Madhav NV Satheesh , Singh Anita 
Published: July 2012

Sodium carboxymethyl cellulose is an excellent pharmaceutical excipient. It possesses good filmability, mucoadhesivity, viscolising capacity and bindability. The current aim of our research work is to synthesize a novel colon targeting polymer by using sodium carboxymethyl cellulose and glycine for colon targeting and to screen its colon specificity by in-vitro release model. Sodium carboxymethyl cellulose was subjected for synthesizing its derivative with glycine using azo linkage. The azo polymeric conjugate was evaluated for its color, solubility, Rf value, melting point, IR and 1HNMR spectral analysis. It was further subjected for evaluating its colon targeting property by in-vitro method using rat fecal matter. The research study revealed that the sodium carboxymethyl cellulose azo derivative showed promising colon specificity for a period of 120 minutes in a controlled manner along with modified solubility. So it can serve as a potential colon targeting polymer.DOI: http://dx.doi.org/10.3329/icpj.v1i8.11252 International Current Pharmaceutical Journal 2012, 1(8): 209-212
Entre masochisme et sexuation : le parcours de Calimero pour devenir coq
Authors: Taverna Isabelle 
Published: July 2012

Sexualité infantile, désir et fantasme : La façon dont l’enfant va conjuguer ces trois données fondamentales à sa construction psychique va dépendre étroitement de sa rencontre avec l’analyste. Ce dernier donnera à l’enfant la possibilité d’un étayage psychique, ainsi qu’une confrontation avec le manque comme accès à la castration, à la question du désir, et à celle de la sexuation.
Les troubles de la dénomination
Authors: Bogliotti Caroline 
Published: July 2012

Si chercher un mot est une difficulté connue de tous les locuteurs, cette capacité est fortement touchée dans certaines pathologies langagières. Les troubles de la dénomination, ou manque du mot , apparaissent dans le tableau clinique de nombreuses pathologies langagières (acquises et développementales), et en sont la manifestation centrale ou le signe prédicteur. Le manque du mot se caractérise par une déviation involontaire de l’intention dénominative du locuteur, et/ou par la difficulté ou l’impossibilité de produire le mot juste. Les troubles de la dénomination connaissent différentes origines : cognitive, ou atteinte du processus de lexicalisation. C’est de ce dernier aspect que traitera cet article de synthèse. La comparaison des manifestations du manque du mot rencontré dans une pathologie acquise (aphasie rencontrée chez l’adulte) et dans une pathologie développementale (dysphasie) nous permettra d’évaluer si les niveaux linguistiques (phonologique, morphologique, lexical, sémantique) intervenant dans la production et la sélection lexicale sont atteints de façon identique. Cette comparaison est intéressante car elle permet d’évaluer la qualité du stock lexical et de ses représentations dans deux populations très différentes : si le stock lexical est bien établi chez l’adulte, il est encore en construction chez l’enfant.
Retour aux origines de la terminologie : l'acte de dénomination
Authors: Humbley John 
Published: July 2012

Il est réducteur de ne traiter les enjeux de la dénomination en terminologie que sous l’angle de l’aménagement linguistique : d’autres approches, surtout conceptuelles, apportent un éclairage complémentaire, mettant en lumière le lien entre langage, sous la forme de la néologie primaire, et conceptualisation. Il est également souhaitable d’analyser la dénomination terminologique non seulement du point de vue du décodeur, mais aussi de celui de l’encodeur. La motivation de celui-ci se conçoit différemment de celle du récepteur. L’apport de ces deux démarches est illustré par l’analyse des dénominations proposées par l’inventeur de l’enregistrement sonore.
L'Inde en Asie de l'Est : engagement sous réserve ?
Authors: Saint-Mézard Isabelle 
Published: July 2012

Dans le cadre de sa politique de « regard vers l’Est », l’Inde s’intègre depuis 20 ans aux échanges de l’Asie orientale. En matière stratégique, New Delhi reste d’une grande prudence. Le rapprochement vis-à-vis des États-Unis et de leurs alliés dans la région est certes incontestable. Mais l’Inde est attentive à ne pas dégrader ses relations avec la puissance chinoise, qui peut défier ses intérêts dans leurs espaces frontaliers.
Nonnos et les combats singuliers de Dionysos
Authors: Frangoulis Hélène 
Published: July 2012

Dans l’épopée nonnienne, les combats
singuliers de Dionysos contre les trois chefs indiens, Orontès,
Dériade et Morrheus, s’achèvent d’une manière qui ne correspond pas
aux normes épiques : au lieu d’être tué par le dieu, l’adversaire se
suicide, meurt de façon inexpliquée ou disparaît simplement du poème.
Ce scénario, voulu dès l’origine par l’auteur, est conforme à la
figure que présente Bacchos tout au long de la guerre des Indes, celle
d’un dieu propagandiste et clément.
Ancora su Nonno e la poesia oracolare
Authors: Piccardi Daria Gigli 
Published: July 2012

La principale question débattue
dans cet article concerne la relation entre la poésie oraculaire de
l’époque impériale et l’épopée grecque tardo-antique, avec une
attention particulière portée à Nonnos de Panopolis. De nombreux
parallèles sont établis entre les oracles théologiques – tirés de la
Philosophia ex oraculis haurienda de Porphyre
et de la Theosophia Tubingensis – et les deux
poèmes de Nonnos. Une attention particulière a été accordée aux
commentaires qui accompagnent les oracles dans la Théosophie : il est très probable qu’ils ont été
compilés dans le même milieu culturel alexandrin dans lequel Nonnos
évoluait.
Le vignoble de Buhl
Authors: Chéray Christian 
Published: July 2012

Le vignoble de Buhl se situe dans la vallée de la Fecht, sur les territoires de l’abbaye de Murbach. Si les origines de son implantation sont obscures, on peut suivre l’histoire du vignoble, l’un des plus hauts d’Alsace, depuis la fin du Moyen Âge. Le cas de Buhl permet de suivre l’évolution d’un vignoble en fonction de l’évolution de la population du village qui, devenue ouvrière, continue à cultiver la vigne qui disparaît dans les années 1970. En 1993, cependant, on assiste à un retour de vignerons qui remettent des parcelles en culture.
Les boissons de « salon » : thé, café, chocolat
Authors: Perry Laurence 
Published: July 2012

Au XVIIe siècle, l’ouverture de l’Europe à d’autres continents entraîne l’apparition de nouvelles boissons dont l’usage touche d’abord les milieux aisés ainsi que de nouveaux lieux de consommation et de distinction sociale, les cafés. Entre plaisir, sociabilité et médecine, le thé, le café, le chocolat se démocratisent lentement jusqu’au début du XXe siècle. C’est le café qui connaît le plus grand succès, mais sous la forme d’ersatz accessibles à une large population.
Kommission für geschichtliche Landeskunde in Baden-Württemberg
Authors: Schindling Anton 
Published: July 2012

La Commission pour les études sur l’histoire du Bade-Wurtemberg est fort récente : elle a l’âge du Land lui-même. Elle est née en 1954 du regroupement de ses deux prédécesseurs : les commissions historiques du Bade et du Wurtemberg, créées la première en 1883, la seconde en 1891 et qui devaient coordonner la recherche sur l’histoire des deux Etats fédérés.La Commission pour les études sur le Bade-Wurtemberg constitue un organisme scientifique qui fédère des disciplines et des institutions scientifiques de sciences humaines et sociales qui mènent une recherche dans le cadre géographique du Bade-Wurtemberg.Elle publie deux séries d’ouvrages scientifiques, une collection d’édition de sources, et une collection de Recherches et les deux grandes revues d’histoire du Land, la ZGO et la ZWLG. Elle a mené à bien le grand projet d’Atlas historique dont la réalisation s’est étendue sur près d’un siècle. Elle publie quatre collections de biographies et le grand et important Manuel de l’histoire du Bade-Wurtemberg, dont 3 parties en 4 tomes ont déjà paru. Ces travaux décrivent brièvement le vaste périmètre des chantiers de notre Commission.Parmi les 60 membres nommés par le Ministre pour la Science et la Recherche, on trouve des enseignants des Universités du Land, ainsi les titulaires des chaires d’histoire générale ou d’histoire du Land, mais aussi des professeurs d’histoire du droit, d’histoire de l’Eglise, et de littérature. Font également partie de la Commission, des membres d’institutions ou autorités publiques en charge des sources de l’histoire du Land, en premier lieu les archivistes. Mais les grandes sociétés d’histoire et d’archéologie peuvent également avoir leurs représentants dans la Commission.Dans le choix des membres correspondants, la Commission s’attache aussi à promouvoir les bonnes relations avec les régions voisines, ainsi l’Alsace, la Suisse et le Vorarlberg.