bluuebunny/crossref_metadata_2025_split huggingface dataset:
Transpedicular screw-rod fixation of the lumbar spine: operative technique and outcome in 104 cases
Authors: Dickman Curtis A. , Fessler Richard G. , MacMillan Michael , Haid Regis W. 
Published: May 2009

✓ A total of 104 patients underwent transpedicular spinal instrumentation using the Cotrel-Dubousset (71 cases) or the Texas Scottish Rite Hospital (33) screw-rod system. Surgery was performed for lumbar vertebral column instability secondary to fractures (28 cases), spondylolisthesis (29), tumors (four), vertebral osteomyelitis (two), or postoperative causes (41). Pseudoarthrodesis due to failure of a prior fusion was present in 37 cases.The 55 men and 49 women (mean age 47 years, range 18 to 87 years) all presented with severe back pain. Signs or symptoms of neural compression were noted in 96 patients. Surgery consisted of neural decompression, internal fixation, and autogenous iliac bone grafting. Spondylolistheses were fusedin situ, without reduction; otherwise, major spinal deformities were corrected. A total of 516 pedicle screws were placed. The mean extent of fusion was 2.7 motion segments (range one to six motion segments).A 96% fusion rate was obtained with a mean follow-up period of 20 months. There were no operative deaths. Major complications included one spinal epidural hematoma, three isolated nerve root deficits (two transient, one permanent), and three wound infections (two deep, one superficial). Instrument failure eventually developed in 18 patients; nine were asymptomatic with a solid fusion and did not require further treatment and the other nine were symptomatic or had a pseudoarthrosis and required operative revision.Pedicle screw-rod fixation offers biomechanical advantages compared to other forms of internal fixation for the lumbar spine. It enables short-segment fixation with preservation of lumbar lordosis and adjacent normal motion segments. This technique provides a highly successful method to obtain arthrodesis, even with prior pseudoarthrosis.
Regional metabolism in experimental brain tumors in cats: relationship with acid/base, water, and electrolyte homeostasis
Authors: Okada Yoshikazu , Kloiber Otmar , Hossmann Konstantin A. 
Published: May 2009

✓ Experimental brain tumors were produced in cats by xenotransplantation of the rat glioma clone F98 into the white matter of the left hemisphere. One to 4 weeks after implantation, local adenosine triphosphate (ATP), glucose, lactate, and tissue pH were measured via imaging techniques in cryostat sections passing through the center of the tumor and correlated with changes in water and electrolyte content. The tumors exhibited a heterogeneous metabolic pattern, with a tendency for ATP to decrease and lactate to increase during tumor development. Tissue pH was above 7.5 in tumors with high ATP content but it sharply declined at low ATP levels. In peritumoral edema, ATP also decreased and lactate increased but, in contrast to tumor tissue, pH became more alkaline. Metabolic changes were associated with edema formation, as evidenced by the rise in water and sodium content. There was a distinct difference between tumor tissue and peritumoral edema: in tumor tissue, pH declined with increasing water content, whereas in peritumoral edema it increased.
These observations are interpreted as follows: 1) in tumor tissue, “lactacidosis” and ATP depletion are attributed to disturbances in blood flow, resulting in metabolic failure and the intracellular “cytotoxic” accumulation of water; 2) in peritumoral edema, “lactalkalosis” is the result of an efflux of (alkaline) lactate salts from the tumor into the expanded extracellular compartment, and the decrease in ATP is the volumetric effect of extracellular “vasogenic” edema fluid and not the result of cellular energy failure. These findings are of importance for the interpretation of volume-selective magnetic resonance spectroscopy and may contribute to the establishment of spectroscopic criteria for the evaluation of therapeutical interventions.
Management of vaginal agenesis by modified McIndoe operation and mould made of sponge and condom
Authors: Khanam Nurun Nahar , Akhter Sayebe , Rahman Nusrat , Runa Jakia Sultana 
Published: May 2009

Keywords: Agenesis; Condom; McIndoe operation; Sponge; VaginaOnline:Â 22 May 2009DOI: 10.3329/bmrcb.v35i1.2318Bangladesh Med Res Counc Bull 2009; 35: 27-28
Prevalence of hepatitis C virus infection in rural adult population of Bangladesh
Authors: Safiullah A.B.M. , Bhuiyan Md. Muzibur Rahman , Miah M.A. Rahim , Raihan A.S.M.A. 
Published: May 2009

Keywords: Bangladesh; Hepatitis C; Prevalence; Viral infectionOnline:Â 22 May 2009DOI: 10.3329/bmrcb.v35i1.2319Bangladesh Med Res Counc Bull 2009; 35: 30-32
Extraction of propionic acid from model solutions: Effect of pH, salts, substrate, and temperature
Authors: Keshav Amit , Wasewar Kailas L. , Chand Shri 
Published: May 2009

AbstractPropionic acid can be successfully produced from fermentation broth once an efficient recovery method is available for the produced acid. Reactive extraction in this regard is a promising recovery method. pH, salt, substrate, and temperature studies are crucial in the extraction of propionic acid, because these parameters varied in actual fermentation broth. With this regard, effects of these were studied. Extraction from model solutions and salt or substrate containing systems is lower than what was obtained from normal aqueous solutions. Reason of this is the varying degree of hindrances of the salts on extraction of the acid. pH has very large effect on extraction efficiency of the extracting system. At pH > pKa of acid, very low extraction was obtained. Temperature was found to have no effect on the extraction from model solutions used. © 2009 American Institute of Chemical Engineers AIChE J, 2009
Acute weight gain and diastolic dysfunction as a potent risk complex for post stem cell transplant atrial fibrillation
Authors: Fatema Kaniz , Gertz Morie A. , Barnes Marion E. , Eisinger Amy D. , Ness Sue Ann C. , Gersh Bernard J. , Micallef Ivana N.M. , Seward James B. , Cha Stephen S. , Bailey Kent R. , S.M. Tsang Teresa 
Published: May 2009

AbstractThe management of atrial fibrillation (AF) following stem cell transplant (SCTX) is often challenging because of the universal presence of profound bone marrow suppression. The incidence of and risk factors for AF/flutter following SCTX are not well known. A total of 395 multiple myeloma (MM) patients consecutively underwent SCTX between 2002 and 2005 at the Mayo Clinic, and 383 of whom, mean age 57 ± 9 years, had no history of evidence of AF/flutter constituted the study population. During 1,002 person‐years of follow up, 39 (10%) patients developed first AF/flutter (incidence of 39 per 1,000 person years), and 28 of these (72%) occurred within 21 days of SCTX. In multivariable‐adjusted analyses, weight gain of ≥7% in the 1st week post‐SCTX (HR 3.68; P = 0.0120) and presence of diastolic dysfunction at MM diagnosis (HR 2.294; P = 0.0082) were independent predictors of AF/flutter. The risk of AF/flutter post‐SCTX increased by about ninefold when both factors were present. Compared to age and sex‐matched MM patients without SCTX, the risk of AF/flutter differed significantly only over the 1st year after MM diagnosis, during which SCTX was performed for the majority. Beyond the 1st year, there was no significant difference in risk of AF/flutter between the two groups. The data suggested that SCTX was associated with significantly increased risk of first AF/flutter, which typically occurred within the first 21 days of the transplant. Weight gain of ≥7% was strongly predictive of first AF/flutter, and the risk was augmented by the presence of diastolic dysfunction at baseline. Am. J. Hematol. 2009. © 2009 Wiley‐Liss, Inc.
Festkörper‐NMR‐Spektroskopie zeigt: Die Einschlusskörperchen von HET‐s(218–289) in E. coli sind Amyloide
Authors: Wasmer Christian , Benkemoun Laura , Sabaté Raimon , Steinmetz Michel O. , Coulary‐Salin Bénédicte , Wang Lei , Riek Roland , Saupe Sven J. , Meier Beat H. 
Published: May 2009

AbstractWährend der heterologen Expression von Proteinen in E. coli tritt häufig eine Proteinablagerung in Einschlusskörperchen (IBs) auf. Die Struktur der E.‐coli‐IBs der prionbildenden Domäne des Pilzprions HET‐s wurde analysiert, und es wurde nachgewiesen, dass diese IBs die gleiche Struktur wie In‐vitro‐Fibrillen haben und eine Prioneninfektiosität zeigen. Die Resultate belegen, dass die IBs von HET‐s(218–289) Amyloide sind.magnified image
Metallfreie regioselektive Triazol‐Ligationen liefern konformativ fixierte cis‐Peptidmimetika
Authors: Ahsanullah  , Schmieder Peter , Kühne Ronald , Rademann Jörg 
Published: May 2009

AbstractMetallfreie Triazolschleifen: 1,5‐Disubstituierte Peptidyltriazole werden regioselektiv durch eine 1,3‐dipolare Cycloaddition von Peptidylphosphoranen und Aziden erhalten. So entstehen Peptidschleifen, die eine konformativ fixierte cis‐Peptidbindung enthalten. Da die Reaktion regioselektiv und ohne Schwermetallzusatz verläuft, könnte sie Anwendung in der chemischen Biologie und der medizinischen Chemie finden.magnified image
Transition‐Metal Phosphate Colloidal Spheres
Authors: Chen Chen , Chen Wei , Lu Jun , Chu Deren , Huo Ziyang , Peng Qing , Li Yadong 
Published: May 2009

AbstractKolloidale Kugeln aller Art mit einem Metall (Mn, Fe, Co, Ni oder Cu) oder mehreren (wie Fe‐Ni‐, Co‐Cu‐, Fe‐Co‐Cu‐, Fe‐Co‐Ni‐Cu‐, Mn‐Fe‐Co‐Ni‐Cu‐ und Mn‐Fe‐Co‐Ni‐Cu‐Zn‐Phosphate) wurden bei niedriger Temperatur in Lösung hergestellt. Durch Einstellen des pH‐Werts ließen sich auch poröse und hohle Eisenphosphatkugeln leicht erhalten.magnified image
A Rhenium Tricarbonyl 4′‐Oxo‐terpy Trimer as a Luminescent Molecular Vessel with a Removable Silver Stopper
Authors: Coogan Michael P. , Fernández‐Moreira Vanesa , Kariuki Benson M. , Pope Simon J. A. , Thorp‐Greenwood Flora L. 
Published: May 2009

AbstractEin lumineszierendes Metallacalixaren mit dreieckigem Querschnitt und einem Silberverschluss (siehe Bild; Re gelb, N blau, O rot) wird in zwei Stufen aus kommerziell erhältlichem Material gebildet. Durch Entfernen der Silberions entsteht ein offenes Calixaren, das als potenzieller Wirtkäfig für kleine Ionen und Moleküle dienen kann. Die Koordination des Silbers löst eine Lumineszenzänderung aus.magnified image
Synthesis and Ligand Properties of a Persistent, All‐Carbon Four‐Membered‐Ring Allene
Authors: Melaimi Mohand , Parameswaran Pattiyil , Donnadieu Bruno , Frenking Gernot , Bertrand Guy 
Published: May 2009

AbstractEin einzelner Donorsubstituent an jedem äußeren C‐Atom genügt, um die CCC‐Einheit von Allenen sehr flexibel zu machen und dem zentralen Kohlenstoffatom Kohlenstoff(0)‐Charakter zu verleihen. Das so zugängliche viergliedrige carbocyclische Allen kann doppelt protoniert werden und verhält sich gegenüber Übergangsmetallen als sehr starker η1‐Donorligand (siehe Schema).magnified image
Nanoporous Nanorods Fabricated by Coordination Modulation and Oriented Attachment Growth
Authors: Tsuruoka Takaaki , Furukawa Shuhei , Takashima Yohei , Yoshida Kaname , Isoda Seiji , Kitagawa Susumu 
Published: May 2009

AbstractGezieltes Wachstum: Nanostäbe aus porösen Koordinationspolymeren (PCPs) sind zugänglich, indem die Koordinationsgleichgewichte zwischen den Gerüstkomponenten moduliert werden, um die Geschwindigkeit der Gerüstausdehnung und des Kristallwachstums einzustellen. TEM‐Untersuchungen deuten an, dass eine Bevorzugung bestimmter Oberflächen der PCP‐Kristalle das anisotrope Wachstum von Nanostäben durch orientierte Anlagerung begünstigt.magnified image
Difluoro‐λ5‐Phosphinonitrile F2PN: Matrix Isolation and Photoisomerization into FPNF
Authors: Zeng Xiaoqing , Beckers Helmut , Willner Helge 
Published: May 2009

AbstractSplendid Isolation: Monomeres Phosphazen F2PN (1A1) wurde erstmals hergestellt, und zwar durch Bestrahlen von F2PN3 in einer Argonmatrix mit einem ArF‐Excimerlaser (λ=193 nm). Bei anschließender Bestrahlung mit einer Hochdruckquecksilberbogenlampe (λ=255 nm) lagerte sich F2PN durch eine 1,2‐Fluorverschiebung in das Iminophosphan cis‐FPNF um.magnified image
Direct Catalytic Asymmetric Mannich‐Type Reaction of Thioamides
Authors: Suzuki Yuta , Yazaki Ryo , Kumagai Naoya , Shibasaki Masakatsu 
Published: May 2009

AbstractWeich hilft hart: Die Titelreaktion zwischen Thioamiden und N‐(Diphenylphosphinoyl)iminen nutzt die kooperative Katalyse einer weichen Lewis‐Säure und einer harten Brønsted‐Base, um Thioamid‐Kohlenstoff‐Pränucleophile in Mannich‐Produkte zu überführen (siehe Schema). Folgereaktionen mit der Thioamideinheit unterstreichen die Nützlichkeit des Verfahrens.magnified image
Medicinal Toxicology of Natural Substances.Foods, Fungi, Medicinal Herbs, Plants, and Venomous Animals. Von Donald G. Barceloux.
Authors: Pohnert Georg 
Published: May 2009

AbstractJohn Wiley & Sons, Hoboken 2008. 1158 S., geb., 162.50 €.—ISBN 978‐0471727613magnified image
Innentitelbild: Knüpfung von Thiostannat‐Sn‐Sn‐Bindungen in Lösung: In‐situ‐Bildung des gemischtvalenten funktionalisierten Komplexes [{(RSnIV)2(μ‐S)2}3SnIII2S6] (Angew. Chem. 24/2009)
Authors: Hassanzadeh Fard Zohreh , Müller Christian , Harmening Thomas , Pöttgen Rainer , Dehnen Stefanie 
Published: May 2009

AbstractEin gemischtvalenter Thiostannat‐Komplex mit einer SnSn‐Bindung, [{(RSnIV)2(μ‐S)2}3SnIII2S6] (R=CMe2CH2COMe), kristallisiert unter Tageslicht nach Kondensation des Doppeldecker‐artigen Thiostannats [(RSn)4S6], wie S. Dehnen et al. in ihrer Zuschrift auf S. 4507 ff. beschreiben. Mößbauer‐Spektren und DFT‐Rechnungen bestätigen, dass der gemischtvalente Komplex formal SnIII‐ neben SnIV‐Zentren enthält. Beide Verbindungen enthalten terminale Carbonylgruppen, die sich für weitere Reaktionen an der Ligandenhülle zur gezielten Synthese komplexer Hybridverbindungen eignen.magnified image
Metal‐Ion‐Coated Graphitic Nanotubes: Controlled Self‐Assembly of a Pyridyl‐Appended Gemini‐Shaped Hexabenzocoronene Amphiphile
Authors: Zhang Wei , Jin Wusong , Fukushima Takanori , Ishii Noriyuki , Aida Takuzo 
Published: May 2009

AbstractThe assembly line: Hexabenzocoronene amphiphiles appended with pyridyl‐terminated triethylene glycol side chains, in combination with trans‐[Pt(PhCN)2Cl2], lead to the formation of graphitic nanotubes. The structural features and dimensions of the nanotubes depend on the assembly conditions. A platinum(II)‐bridged cyclic dimer having two HBC units self‐assembles into a nanotubular structure.magnified image
A Rhenium Tricarbonyl 4′‐Oxo‐terpy Trimer as a Luminescent Molecular Vessel with a Removable Silver Stopper
Authors: Coogan Michael P. , Fernández‐Moreira Vanesa , Kariuki Benson M. , Pope Simon J. A. , Thorp‐Greenwood Flora L. 
Published: May 2009

AbstractShining metal cups: A luminescent tube of triangular cross‐section and stoppered by a silver ion (see picture: Re yellow, N blue, O red) is formed in two steps from commercial materials. The silver ion can be removed to give a tube, and both species are potential hosts for small ions and molecules; a change in luminescence is triggered by the encapsulation of silver.magnified image
Synthesis and Ligand Properties of a Persistent, All‐Carbon Four‐Membered‐Ring Allene
Authors: Melaimi Mohand , Parameswaran Pattiyil , Donnadieu Bruno , Frenking Gernot , Bertrand Guy 
Published: May 2009

AbstractA single donor substituent at each terminus is sufficient to make the CCC skeleton of allenes very flexible and give carbon(0) character to the central carbon atom. This allows the synthesis of a four‐membered carbocyclic allene, which can be doubly protonated and behaves as a very strong η1‐donor ligand for transition metals (see scheme).magnified image
Nanoporous Nanorods Fabricated by Coordination Modulation and Oriented Attachment Growth
Authors: Tsuruoka Takaaki , Furukawa Shuhei , Takashima Yohei , Yoshida Kaname , Isoda Seiji , Kitagawa Susumu 
Published: May 2009

AbstractA growing attachment: Porous coordination polymer (PCP) nanorods are synthesized by modulation of the coordination equilibria between framework components, which regulates the rate of framework extension and crystal growth. Investigation of the crystal growth mechanism by TEM indicates that face‐selective modulation on the surfaces of PCP crystals enhances the anisotropic crystal growth of nanorods by an oriented attachment mechanism.magnified image
Direct Catalytic Asymmetric Mannich‐Type Reaction of Thioamides
Authors: Suzuki Yuta , Yazaki Ryo , Kumagai Naoya , Shibasaki Masakatsu 
Published: May 2009

AbstractTaking the reins: The title transformation of thioamides and N‐diphenylphosphinoyl imines is described. By harnessing the power of cooperative catalysis between a soft Lewis acid and a hard Brønsted base, thioamide carbon pronucleophiles can furnish Mannich products (see scheme). Divergent transformation of the thioamide functionality highlights the utility of this methodology.magnified image
Inside Cover: Thiostannate Tin–Tin Bond Formation in Solution: In Situ Generation of the Mixed‐Valent, Functionalized Complex [{(RSnIV)2(μ‐S)2}3SnIII2S6] (Angew. Chem. Int. Ed. 24/2009)
Authors: Hassanzadeh Fard Zohreh , Müller Christian , Harmening Thomas , Pöttgen Rainer , Dehnen Stefanie 
Published: May 2009

AbstractA mixed‐valent thiostannate complex with a SnSn bond, [{(RSnIV)2(μ‐S)2}3SnIII2S6] (R=CMe2CH2COMe), crystallizes upon condensation of the dissolved double‐decker thiostannate [(RSn)4S6] in daylight, as S. Dehnen et al. describe in their Communication on page 4441 ff. Mössbauer spectra and DFT calculations confirm that the mixed‐valence complex formally contains SnIII and SnIV atoms. Both compounds have terminal carbonyl groups, which can be used for further reactions at the ligand shell for the targeted synthesis of complex hybrid compounds.magnified image
Reactivity of mixed organozinc and organocopper reagents. 3. Atom economic electrophilic amination of methyl arylzinc reagents
Authors: Erdik Ender , Ömür Pekel Özgen , Kalkan Melike 
Published: May 2009

AbstractReaction of methyl arylzincs with acetoneO‐(mesitylenesulfonyl)oxime in THF in the presence of CuCN at room temperature is efficient in selective electrophilic amination of aryl carbanions. This procedure allows for the preparation of arylamines in moderate to good yields and provides an efficient and atom economic alternative to existing amination methods for diarylzincs. Copyright © 2009 John Wiley & Sons, Ltd.
Preparation of ReFeO3 nanocrystalline powders by auto‐combustion of citric acid gel
Authors: Wu Anhua , Cheng Guofeng , Shen Hui , Xu Jiayue , Chu Yaoqing , Ge Zengwei 
Published: May 2009

AbstractAutocombustion of citric acid gel was employed to prepare ReFeO3 (Re = Gd, Nd) nanocrystalline powders. The phase identification and lattice parameters were investigated by the X‐ray diffraction (XRD). Field‐emission scanning electron microscopy (FESEM) investigations were carried out to examine the morphology and average size of these powders. Several one phonon lines, two‐magnon excitation, and two‐phonon scattering have been assigned in their Raman spectra. Both NdFeO3 and GdFeO3 nanocrystalline powders were single ReFeO3 phase, which are agglomerated with average crystallite size of 70–90 nm. The investigations indicated that the autocombustion of citric acid gel method is an effective technology to prepare ReFeO3 nanocrystalline powders. Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd.
Mechanism study on carbon reducing reaction in the preparation process of strontium carbonate (SrCO3)
Authors: Meng Jun , Liu Gousheng , Zhao Hongyu , Wang Lijuan , Yu Jianguo 
Published: May 2009

AbstractThe mechanism for preparation of strontium carbonate (SrCO3) by the method of carbon reducing reaction is studied in this paper. Based on the mass ratio of SrSO4/C = 1.5 for this reaction, thermodynamics and kinetics calculation are conducted and also verified by TG‐DSC experimental methods. For each side reaction, the changes of standard molar Gibbs function at proposed temperature are calculated through Gibbs‐Helmholtz, Van't Hoff and Kirchhoff equations. TG‐DSC data are used to explore the mechanism of the reaction, and to calculate the apparent activation energy and reaction orders. It has been demonstrated by TG and DSC thermal analysis for the whole reducing reaction that the apparent activation energy E is 350.6 and 307.3 kJ·mol−1, and the reaction orders n are 0.91 and 0.88, respectively. Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd.
Carrier effects on oxygen mass transfer behavior in a moving‐bed biofilm reactor
Authors: Jing Jie Ying , Feng Jie , Li Wen Ying 
Published: May 2009

AbstractThis study investigates the carrier effects on the oxygen mass transfer behavior of a gas–liquid biofilm surface, and aims to provide evidence for parameter optimization in the practical operation of a moving‐bed biofilm reactor (MBBR) during the coking‐plant wastewater process. By using the dynamic oxygen dissolution method, the volumetric oxygen mass transfer coefficient KLa was measured by varying the suspended carrier stuffing rate and the intensity of aeration. Within the range of fluidizable flow rate, the efficiency of oxygen mass transfer increased with suspended carrier stuffing rate, and KLa reached its peak value when the stuffing rate was 40%. KLa has an increasing trend with an increase of the aeration intensity, but high aeration intensity was not favorable for reactor operation. Better oxygen mass transfer effect and higher oxygen transfer efficiency could be achieved when the aeration intensity was 0.3 m3 h−1 and the suspended carrier stuffing rate was 30–50%. The possible mechanisms that can account for carrier effects on oxygen mass transfer are the changes in the gas–liquid interfacial area. The ammonia nitrogen removal performance of the coking‐plant wastewater in MBBR was satisfied by using the above‐suggested conditions. Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd.
Overexpression of β‐Catenin is Responsible for the Development of Portal Hypertension During Liver Cirrhosis
Authors: Hong Jian‐Jun , Pan Fei‐Yan , Qian Yan , Cheng Li‐Cheng , Zhang Hong‐Xia , Xue Bin , Li Chao‐Jun 
Published: May 2009

Abstractβ‐catenin functions as both a structural protein and a transcriptional activator. In this study, we examined the expression of β‐catenin in human cirrhotic livers, and administered adenoviruses carrying the β‐catenin or ΔTCF4 genes to cirrhotic rats to investigate the role of β‐catenin in the development of liver cirrhosis development. β‐catenin expression was associated with liver cirrhosis development in cirrhotic human and rat liver. β‐catenin adenovirus was capable of accelerating cirrhosis progress but this progression was unaffected by administration of ΔTCF4 adenovirus. β‐catenin was mainly located in the intercellular regions between liver cells and was highly concentrated in the hepatic sinusoid wall, where α‐smooth muscle actin (SMA) was also mainly distributed. The binding of β‐catenin to α‐SMA was also increased in cirrhotic liver. Portal vein blood pressure was significantly increased in the group administered β‐catenin adenovirus, but not in that receiving ΔTCF4 adenovirus. These results suggest that high concentrations of β‐catenin at the hepatic intercellular membrane and the hepatic sinusoid wall contribute to hepatic hyperpiesia in liver cirrhosis patients. β‐catenin functions as a structural molecule, but not as a signaling molecule, during liver cirrhosis development. Anat Rec, 292:818–826, 2009. © 2009 Wiley‐Liss, Inc.