bluuebunny/crossref_metadata_2025_split huggingface dataset:
Nemi különbségek a barátok közötti versengésben
Authors: F. Lassú Zsuzsa 
Published: March 2005

Kutatásunk célja a baráti kapcsolatokban lehetséges versengésben megfigyelhető nemi különbségek fiatal magyar felnőttek körében végzett vizsgálata volt. Ennek érdekében 345 főiskolai és egyetemi hallgatót - 161 férfit és 184 nőt - kérdeztünk meg az azonos nemű barátok közötti versengésről alkotott véleményükről és saját viselkedési intenciójukról különböző versengési helyzetekben. A kutatási cél eléréséhez saját fejlesztésű kérdőívet állítottunk össze. A kérdőív hat helyzetleírást tartalmazott, melyben a barátok különböző célokért versenghettek egymással. Ezek a célok a következők voltak: szexuális partner, anyagi javak, intellektuális felsőbbség, sportteljesítmény, társas elfogadottság és karrierlehetőség. A vizsgálati személyeknek minden helyzetben el kellett dönteniük, hogy az előre megadott válaszlehetőségeket mennyire tartják az adott helyzetben elfogadhatónak; mit gondolnak, az emberek többsége melyiket választaná legvalószínűbben és legkevésbé valószínűen; és ők maguk melyiket választanák. Tapasztalataink egyértelműen alátámasztják azokat az elméleteket, melyek azonos neműek baráti kapcsolatában fontos tényezőnek, és bizonyos körülmények között elkerülhetetlennek tartják a versengést. A különböző helyzetekben megjelenő versengés minőségét azonban számos tényező határozza meg. Fontos befolyásoló tényezőnek találtuk a válaszadó nemét, amely a helyzeti és egyéb személyiségbeli tényezőkkel, például a személy versengési hajlamával interakcióban, a legtöbb szituációban elkülönítette a válaszokat. Eredményeink sajátos színben tüntetik fel férfiak és nők versengésének különbségét. Nem találtunk egyértelmű bizonyítékot arra a széles körben osztott elképzelésre, hogy a nők saját nemük tagjait versengőbbnek látják, mint a férfiakat, és saját viselkedésükben nem vállalják nyíltan a versengést. Eredményeink a nem és egyéb változók interakciós befolyását tükrözik, amely interakcióban a válaszadó neme dinamikusan változó irányú és erősségű hatással bír.
Tyrosine O‐Sulfation
Authors: Corbeil Denis , Thiele Christoph , Huttner Wieland B. 
Published: March 2005

AbstractThe O‐sulfation of tyrosine residues of plasma membrane and secretory proteins that transit through the secretory pathway of eukaryotic cells is a widespread post‐translational modification. This enzymatic reaction is catalyzed by trans‐Golgi‐associated tyrosylprotein sulfotransferases, which recognize tyrosine residues located in a specific acidic amino acid sequence. Tyrosine sulfation promotes extracellular protein–protein interactions involved in diverse biological processes, ranging from the receptor binding of regulatory peptides to the interaction of viral envelope proteins with the cell surface. This unit outlines procedures to determine whether a protein of interest contains sulfated tyrosine residues, using methods based on labeling proteins with inorganic [35S]‐sulfate, alkaline hydrolysis, and one‐dimensional thin‐layer electrophoresis.
Protein Profiling by Microscale Solution Isoelectrofocusing (MicroSol‐IEF)
Authors: Zuo Xun , Lee KiBoem , Ali‐Khan Nadeem , Speicher David W. 
Published: March 2005

AbstractSample prefractionation is essential for more comprehensive coverage and reliable detection of low‐abundance proteins in complex proteomes. An efficient and reproducible new method for sample prefractionation is microscale solution isoelectrofocusing (MicroSol‐IEF), in which samples are separated into chambers defined by membranes of specific pH, yielding well resolved fractions on the basis of isoelectric point (pI). The output seamlessly interfaces with narrow‐pH‐range 2‐D gels, enhancing data obtained from protein profiling studies, including quantitative proteome comparisons. This unit presents the MicroSol‐IEF method using the ZOOM IEF Fractionator with either commercially available or custom‐made pH partition membranes. Alternative configurations are possible for separating samples into different numbers of fractions with various pH ranges and volumes. A detailed method is provided for preparing custom pH membranes. In addition, methods are provided for evaluating the effectiveness of the prefractionation, using 1‐D and 2‐D gel electrophoresis. Approaches for quantitative protein profiling that incorporate MicroSol‐IEF are also discussed.
Immunophenotyping of T Cell Subpopulations in HIV Disease
Authors: Chattopadhyay Pratip K. , Roederer Mario 
Published: March 2005

AbstractThis unit illustrates the challenges associated with measurements of T cell subpopulations, and describes how those challenges can be overcome by using polychromatic (5+ color) approaches to flow cytometry. Such approaches are immensely powerful and directly applicable to studies of T cell biology in HIV disease; however, their development requires careful consideration of the antibodies and fluorochromes employed, as discussed here. Furthermore, factors generally known to influence T cell counts can also govern the success or failure of polychromatic experiments; therefore, these factors are reviewed and provide recommendations for minimizing their influence on polychromatic measurements of T cell subsets.
Fright is a provoking factor in vanishing white matter disease
Authors: Vermeulen Gerre , Seidl Rainer , Mercimek‐Mahmutoglu Saadet , Rotteveel Jan J. , Scheper Gert C. , van der Knaap Marjo S. 
Published: March 2005

AbstractLeukoencephalopathy with vanishing white matter is an inherited disorder with a chronic progressive disease course and additional episodes of rapid neurological deterioration. These episodes typically are provoked by febrile infections or minor head trauma. We report on two patients who experienced an episode of rapid neurological deterioration after a fright. Ann Neurol 2005;57:560–563
Detection of entorhinal layer II using Tesla magnetic resonance imaging
Authors: Augustinack Jean C. , van der Kouwe Andre J. W. , Blackwell Megan L. , Salat David H. , Wiggins Christopher J. , Frosch Matthew P. , Wiggins Graham C. , Potthast Andreas , Wald Lawrence L. , Fischl Bruce R. 
Published: March 2005

AbstractThe entorhinal cortex lies in the mediotemporal lobe and has major functional, structural, and clinical significance. The entorhinal cortex has a unique cytoarchitecture with large stellate neurons in layer II that form clusters. The entorhinal cortex receives vast sensory association input, and its major output arises from the layer II and III neurons that form the perforant pathway. Clinically, the neurons in layer II are affected with neurofibrillary tangles, one of the two pathological hallmarks of Alzheimer's disease. We describe detection of the entorhinal layer II islands using magnetic resonance imaging. We scanned human autopsied temporal lobe blocks in a 7T human scanner using a solenoid coil. In 70 and 100μm isotropic data, the entorhinal islands were clearly visible throughout the anterior–posterior extent of entorhinal cortex. Layer II islands were prominent in both the magnetic resonance imaging and corresponding histological sections, showing similar size and shape in two types of data. Area borders and island location based on cytoarchitectural features in the mediotemporal lobe were robustly detected using the magnetic resonance images. Our ex vivo results could break ground for high‐resolution in vivo scanning that could ultimately benefit early diagnosis and treatment of neurodegenerative disease. Ann Neurol 2005;57:489–494
JC virus granule cell neuronopathy: A novel clinical syndrome distinct from progressive multifocal leukoencephalopathy
Authors: Koralnik Igor J. , Wüthrich Christian , Dang Xin , Rottnek Matthew , Gurtman Alejandra , Simpson David , Morgello Susan 
Published: March 2005

AbstractProgressive multifocal leukoencephalopathy (PML) typically affects the CNS white matter of the central nervous system. We present an human immunodeficiency virus–infected patient with polyomavirus JC infection restricted to granule cell neurons of the cerebellum and with corresponding neurological symptomatology. Magnetic resonance imaging demonstrated cerebellar atrophy without white matter lesions and stereotactic biopsy showed selective infection of the cerebellar granular cell layer, with preservation of Purkinje cells and absence of classic progressive multifocal leukoencephalopathy histopathology in underlying white matter. Evolution over 8 years was marked by symptomatic improvement corresponding to highly active antiretroviral therapy (HAART), with modest increase in CD4+ T‐cell counts. We propose to call this novel syndrome JCV granule cell neuronopathy (JCV GCN). Ann Neurol 2005;57:576–580
Germanium carboxylates: the first X‐ray diffraction study of germanium(II) dicarboxylate and germanium(IV) tetracarboxylate
Authors: Khrustalev Victor N. , Portnyagin Ivan A. , Zemlyansky Nikolay N. , Borisova Irina V. , Ustynyuk Yuri A. , Antipin Mikhail Yu. , Nechaev Mikhail S. , West Robert 
Published: March 2005

AbstractGermanium(II) dipropionate (1) has been synthesized and its crystal structure, as well as that of germanium(IV) tetrapropionate (2), has been determined. By contrast to monomeric 2 with monodentate propionate ligands, compound 1 is associated, forming a cyclotetramer [Ge(O2CEt)2]4 (1a) via intermolecular dative CO → Ge interactions. Copyright © 2005 John Wiley & Sons, Ltd.
Dynamics of arsenic speciation in surface waters: As(III) production by algae
Authors: Hellweger Ferdi L. 
Published: March 2005

AbstractAlgae reduce and methylate arsenate [As(V)]. The end product of the overall transformation reaction can be arsenite [As(III)] or methylated arsenic. Field and laboratory data suggest a strong correlation between the end product of the reaction and the growth rate of the algae, with As(III) only produced during log (exponential, fast) growth. The result is a peak in As(III) concentration preceding or coincident with the algal bloom. This paper analyzes data from 18 different water bodies (five lakes, one river, six estuary/marine sites, six experimental sites). Algal blooms, As(III) peaks and algal blooms with preceding or coincident As(III) peaks were identified. In total, 80 algal blooms were identified, 49 (61%) of which were associated with As(III) peaks. In 78% of water bodies algal blooms were typically (>50%) associated with As(III) peaks. The average time lag between As(III) peaks and algal blooms was 20 days (standard deviation 18 days). Copyright © 2005 John Wiley & Sons, Ltd.
Randomized clinical trial of mechanical bowel preparation versus no preparation before elective left-sided colorectal surgery
Authors: Bucher P , Gervaz P , Soravia C , Mermillod B , Erne M , Morel P 
Published: March 2005

Abstract

Background
Mechanical bowel preparation (MBP) is performed routinely before colorectal surgery to reduce the risk of postoperative infectious complications. The aim of this randomized clinical trial was to compare the outcome of patients who underwent elective left-sided colorectal surgery with or without MBP.

Methods
Patients scheduled for elective left-sided colorectal resection with primary anastomosis were randomized to preoperative MBP (3 litres of polyethylene glycol) (group 1) or surgery without MBP (group 2). Postoperative abdominal infectious complications and extra-abdominal morbidity were recorded prospectively.

Results
One hundred and fifty-three patients were included in the study, 78 in group 1 and 75 in group 2. Demographic, clinical and treatment characteristics did not differ significantly between the two groups. The overall rate of abdominal infectious complications (anastomotic leak, intra-abdominal abscess, peritonitis and wound infection) was 22 per cent in group 1 and 8 per cent in group 2 (P = 0·028). Anastomotic leak occurred in five patients (6 per cent) in group 1 and one (1 per cent) in group 2 (P = 0·021). Extra-abdominal morbidity rates were 24 and 11 per cent respectively (P = 0·034). Hospital stay was longer for patients who had MBP (mean(s.d.) 14·9(13·1) versus 9·9(3·8) days; P = 0·024).

Conclusion
Elective left-sided colorectal surgery without MBP is safe and is associated with reduced postoperative morbidity.
Provider volume and outcomes for oncological procedures
Authors: Killeen S D , O'Sullivan M J , Coffey J C , Kirwan W O , Redmond H P 
Published: March 2005

Abstract

Background
Oncological procedures may have better outcomes if performed by high-volume providers.

Methods
A review of the English language literature incorporating searches of the Medline, Embase and Cochrane collaboration databases was performed. Studies were included if they involved a patient cohort from 1984 onwards, were community or population based, and assessed health outcome as a dependent variable and volume as an independent variable. The studies were also scored quantifiably to assess generalizability with respect to any observed volume–outcome relationship and analysed according to organ system; numbers needed to treat were estimated where possible.

Results
Sixty-eight relevant studies were identified and a total of 41 were included, of which 13 were based on clinical data. All showed either an inverse relationship, of variable magnitude, between provider volume and mortality, or no volume–outcome effect. All but two clinical reports revealed a statistically significant positive relationship between volume and outcome; none demonstrated the opposite.

Conclusion
High-volume providers have a significantly better outcome for complex cancer surgery, specifically for pancreatectomy, oesphagectomy, gastrectomy and rectal resection.
Seed Galactomannans: An Overview
Authors: Srivastava Manjoosha , Kapoor V. P. 
Published: March 2005

AbstractSeed galactomannans are vegetable, heterogeneous polysaccharides widely distributed in nature. Generally, they possess (1→4)‐linked D‐mannopyranose (Man) main chains to which are attached (1→6)‐linked D‐galactopyranosyl (Gal) units. The Man/Gal ratios differ from gum to gum, resulting in a change in structure, which, in turn, determines the various industrial applications of seed galactomannans. These materials are important in paper, textile, petroleum‐drilling, pharmaceutics, food, cosmaceutics, and explosives industries. In this review, the biodiversified applicability of galactomannan gums is discussed, particularly with respect to structural aspects, properties, human consumption, and technical applications. Especially important is that the solution properties (rheological behaviour, viscosity, emulsifying tendency, etc.) of natural and chemically modified galactomannans can be tuned by interaction with other (carbohydrate‐based) monomers or polymers.
The Agonist Paradox: Agonists and Antagonists of Acetylcholine Receptors and Opioid Receptors
Authors: Dukhovich Felix S. , Darkhovskii Michael B. , Gorbatova Elena N. , Polyakov Victor S. 
Published: March 2005

AbstractIn contrast to antagonists, agonists tend to induce considerable conformational changes in their receptors, resulting in opening of ion channels, either directly or via secondary messengers. These conformational transformations require great energy expenses. However, the experimentally determined free energies of complexation between agonists and receptors are often relatively smaller than those for the corresponding antagonists. To rationalize this so‐called ‘agonist paradox’, which has not been clarified in the literature, we have developed an alternative model. Our model may help to discriminate between agonists and antagonists of the acetylcholine (ACh) and μ‐opioid receptors. For this purpose, a series of ligands (1–18) have been analyzed both in structural terms and with respect to complexation geometry within the anionic binding sites of these two receptor types.
Exploring the Antibacterial and Hemolytic Activity of Shorter‐ and Longer‐Chain β‐, α,β‐, and γ‐Peptides, and of β‐Peptides from β2‐3‐Aza‐ and β3‐2‐Methylidene‐amino Acids Bearing Proteinogenic Side Chains – A Survey
Authors: Arvidsson Per I. , Ryder Neil S. , Weiss H. Markus , Hook David F. , Escalante Jaime , Seebach Dieter 
Published: March 2005

AbstractThe antibacterial activities of 31 different β‐, mixed α/β‐, and γ‐peptides, as well as of β‐peptides derived from β2‐3‐aza‐ and β3‐2‐methylidene‐amino acids were assayed against six pathogens (Enterococcus faecalis, Staphylococcus aureus, Streptococcus pneumoniae, Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa), and the results were compared with literature data. The interaction of these peptides with mammalian cells, as modeled by measuring the hemolysis of human erythrocytes, was also investigated. In addition to those peptides designed to fold into amphiphilic helical conformations with positive charges on one face of the helix, one new peptide with hemolytic activity was detected within the sample set. Moreover, it was demonstrated that neither cationic peptides used for membrane translocation (β3‐oligoarginines), nor mixed α/β‐ or γ‐peptides with somatostatin‐mimicking activities display unwanted hemolytic activity.
Revealing Structural Effects, Part II: The Influence of Molecular Structure on the Adsorption of Butanol Isomers on Platinum
Authors: Souto Ricardo M. , Rodríguez José L. , Pastor Elena 
Published: March 2005

AbstractThe nature of the adsorbates formed when butanol isomers interact with platinum electrodes in a perchloric acid medium was investigated by the application of on‐line differential electrochemical mass spectrometry (DEMS) and cyclic voltammetry. In this way, the reactivity of the residues remaining on the electrode surface after a flow‐cell experiment was established for the different molecules. It was found that the four isomers form strongly adsorbed species on the electrode, which undergo both electro‐oxidation and electroreduction, depending on the potential applied at the electrode. Oxidative stripping of the adsorbates produces CO2 as the only oxidation product, whereas propane and the corresponding butane isomer are obtained on platinum in the hydrogen adsorption potential region. The yields of these hydrocarbons were found to depend strongly on the nature of the butanol isomer and on the adsorption potential. According to these results, it can be concluded that fragmentation of the butanol isomers occurs during adsorption and reduction reactions. C4 alkene and acetyl species are proposed as the adsorbed intermediates in all cases.
Lanthanide Complexes Coordinated by N‐Substituted (R)‐1,1′‐Binaphthyl‐2,2′‐diamido Ligands in the Catalysis of Enantioselective Intramolecular Hydroamination
Authors: Collin Jacqueline , Daran Jean‐Claude , Jacquet Olivier , Schulz Emmanuelle , Trifonov Alexander 
Published: March 2005

AbstractA new family of lanthanide ionic complexes derived from chiral, substituted (R)‐binaphthylamine ligands, [Li(thf)4][Ln{(R)‐C20H12(NR)2}2] (Ln=Yb, Sm, Nd, or Lu), has been synthesized and characterized by X‐ray crystal structure analyses. All complexes have been tested as new catalysts for the hydroamination/cyclization of 1‐(aminomethyl)‐1‐allylcyclohexane. Ytterbium complexes proved to be both the most active and the most enantioselective, and the use of the complex [Li(thf)4][Yb{(R)‐C20H12(NC3H7)2}2], bearing isopropyl radicals on the nitrogen atoms, allowed the formation of the corresponding spiropyrrolidine in high yield with up to 70 % ee.
Enantioselective Catalysis in Water: Mukaiyama‐Aldol Condensation Promoted by Copper Complexes of Bisoxazolines Supported on Poly(ethylene glycol).
Authors: Benaglia Maurizio , Cinquini Mauro , Cozzi Franco , Celentano Giuseppe 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Chiral Phosphine Oxide BINAPO as a Catalyst for Enantioselective Allylation of Aldehydes with Allyltrichlorosilanes.
Authors: Nakajima Makoto , Kotani Shunsuke , Ishizuka Tadao , Hashimoto Shunichi 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Preparation of New Nitrogen‐Bridged Heterocycles. Part 56. Syntheses and Reactions of 1‐[2,2‐Bis(alkylthio)‐1‐(ethoxycarbonylacetyl)vinyl]pyridinium Salts.
Authors: Kakehi Akikazu , Suga Hiroyuki , Yamauchi Yuuya , Yasuraoka Katsuaki , Kobayashi Tomoshige , Ohta Akira 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
The Economic Synthesis of Pyridinium Fluorochromate(VI), C5H5NH[CrO3F] (PFC), and Solvent‐Free Oxidation of Organic Substrates with PFC.
Authors: Chaudhuri Mihir K. , Dehury Sanjay K. , Dhar Siddhartha S. , Sinha Upasana B. 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of Highly Functionalized Chiral Nitriles by Radical Fragmentation of β‐Hydroxy Azides. Convenient Transformation of Aldononitriles into 1,4‐ and 1,5‐Iminoalditols.
Authors: Hernandez Rosendo , Leon Elisa I. , Moreno Pilar , Riesco‐Fagundo Concepcion , Suarez Ernesto 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Stereospecific Reaction of α‐Carbamoyloxy‐2‐alkenylboronates and α‐Carbamoyloxy‐alkylboronates with Grignard Reagents — Synthesis of Highly Enantioenriched Secondary Alcohols.
Authors: Beckmann Edith , Desai Vidya , Hoppe Dieter 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Kilogram‐Scale Synthesis of Bis(6‐hydroxy‐5,5‐dimethylhexyl)ether (ESP24232), a Novel Lipid Lowering Agent.
Authors: Yang Jing , Mueller Ralf , Pop Emil , Dasseux Jean‐Louis H. , Oniciu Daniela C. 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Preparation and Applications of a Novel Bis(tributylstannyl)cyclopropane: A Synthetic Equivalent of a Cyclopropane‐1,2‐dianion.
Authors: Heureux Nicolas , Marchant Melanie , Maulide Nuno , Berthon‐Gelloz Guillaume , Hermans Christophe , Hermant Sebastien , Kiss Eleonora , Leroy Bernard , Wasnaire Pierre , Marko Istvan E. 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Investigations into the Enantioselective C‐Protonation of Prostereogenic Enolate(s) Derived from N,N′‐Diisopropyl‐2‐phenylpropanamide Using Suicide C‐Based Proton Sources.
Authors: Coumbarides Gregory S. , Eames Jason , Ghilagaber Stephanos , Suggate Michael J. 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Convenient Synthesis of Labdane and Drimane Analogues with o‐Quinol Functionality.
Authors: Meenakshi S. , Sivaramkrishnan A. , Padmakumar R. , Hadimani Shreeshaikumar B. , Bhat Sujata V. 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Reversal of Enantioselectivity on Protonation of Enol(ate)s Derived from 2‐Methyl‐1‐tetralone Using C2‐Symmetric Sulfonamides.
Authors: Boyd Ewan , Coumbarides Gregory S. , Eames Jason , Hay Alastair , Jones Ray V. H. , Stenson Rachel A. , Suggate Michael J. 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Rhodium(II)‐Catalyzed Reaction of Iodonium Ylides with Conjugated Compounds: Efficient Synthesis of Dihydrofurans, Oxazoles, and Dihydrooxepins.
Authors: Lee Yong Rok , Yoon Sang Heum , Seo Youngwan , Kim Bong Sik 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Silica‐Assisted Reactions of Pyrroles with 1‐Acyl‐2‐bromoacetylenes.
Authors: Stepanova Zinaida V. , Sobenina Lubov' N. , Mikhaleva Al'bina I. , Ushakov Igor' A. , Chipanina Nina N. , Elokhina Valentina N. , Voronov Vladimir K. , Trofimov Boris A. 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Polycyclic [2 + 3]‐Cycloadducts from the Thermal Decomposition of Bis(2,5‐dihydro‐1,3,4‐thiadiazoles) in the Presence of N‐Methylmaleimide.
Authors: Mloston G. , Celeda M. , Linden A. , Heimgartner H. 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
3‐(2‐Methoxytetrahydrofuran‐2‐yl)pyrazoles: A Novel Class of Potent, Selective Cyclooxygenase‐2 (COX‐2) Inhibitors.
Authors: Ranatunge Ramani R. , et al. et al. 
Published: March 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.