bluuebunny/crossref_metadata_2025 huggingface dataset:
Repulsive Core Effect in Radiative np Capture
Authors: Kaschluhn F. , Lewin K.
Published: May 2007

It is shown that the difference between the experimental capture cross section and the impulse approximation strongly depends on the hard core of the NN interaction. Use of hard core wave functions is not sufficient to explain quantitatively the experimental result. The exchange potential itself has to be modified for small nucleon distances.
Microemulsion and conventional emulsion copolymerizations of styrene with methyl methacrylate
Authors: Reddy G. V. Ramana , Devi N. Gayathri , Panda Jayakishore
Published: May 2007

The microemulsion (M.E.) and conventional emulsion (C.E.) copolymerizations of styrene (STY) with methyl methacrylate (MMA) are carried out at 70°C by employing n‐pentanol (PA) and n‐octanol (OA), respectively, as cosurfactants along with sodium lauryl sulfate (SLS), as surfactant in the reaction media, and potassium persulphate (KPS) as initiator. The copolymers are characterized by FTIR, NMR, TG/DTA, and GPC techniques. The reactivity ratios are evaluated by employing Fineman‐Ross (F‐R), Kellen‐Tüdös (K‐T), and Mayo‐Lewis integration (M‐L‐I) methods. The K‐T method yields the apparent reactivity ratios, 0.73 (rSTY), 0.39 (rMMA) and 0.55 (rSTY), 0.50 (rMMA), respectively, for the M.E. and C.E. copolymerizations of STY and MMA with PA as the cosurfactant present in the reaction media. And the K‐T method yields the apparent reactivity ratios, 0.56 (rSTY), 0.43 (rMMA), and 0.42 (rSTY), 0.51 (rMMA), respectively, for the M.E. and C.E. copolymerizations of STY and MMA with OA as the cosurfactant present in the reaction media. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Study of miscibility, crystallization, mechanical properties, and thermal stability of blends of poly(3‐hydroxybutyrate) and poly(3‐hydroxybutyrate‐co‐4‐hydroxybutyrate)
Authors: Luo Rongcong , Xu Kaitian , Chen Guo‐Qiang
Published: May 2007

Natural amorphous polymer poly(3‐hydroxybutyrate‐co‐4‐hydroxybutyrate) (P3HB4HB) containing 41 mol % of 4HB was blended with poly(3‐hydroxybutyrate) (PHB) with an aim to improve the properties of PHB. The influence of P3HB4HB contents on thermal and mechanical properties of the blends was evaluated with differential scanning calorimetry (DSC), Fourier transform infrared (FTIR) spectroscopy, stress–strain measurement and thermo gravimetric analyzer. Miscibility of PHB/P3HB4HB blends was mainly decided by the contents of P3HB4HB. When P3HB4HB exceeded 50 wt %, the two polymer phases separated and showed immiscibility. The addition of P3HB4HB did not alter the crystallinity of PHB, yet it diluted the PHB crystalline phase as revealed by DSC studies. DSC and FTIR results showed that the overall crystallinity of the blends decreased remarkably with increasing of P3HB4HB contents. Decreased glass transition temperature and crystallinity imparted desired flexibility for the blends. The ductility of the blends increased progressively with increasing of P3HB4HB content. Thus, the PHB mechanical properties can be modulated by changing the blend composition. P3HB4HB did not significantly improve the thermal stability of PHB, yet it is possible to melt process PHB without much molecular weights loss via blending it with suitable amounts of P3HB4HB. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Chemical modification of metallocene‐based polyethylene–octene elastomer through solution grafting of acrylic acid and its effect on the physico‐mechanical properties
Authors: Biswas Anjan , Bandyopadhyay Abhijit , Singha Nikhil K. , Bhowmick Anil K.
Published: May 2007

In the present work, the metallocene‐based polyethylene–octene elastomer (POE) was chemically modified by solution grafting of acrylic acid in presence of benzoyl peroxide. The relative proportions of graft and gel formation were optimized through %weight gain, Fourier Transform infrared spectroscopy, elemental analysis and proton nuclear magnetic resonance spectroscopy. The gel formation in the POE matrix was found to be the prime competitor. The effect of grafting at its maximum level on various physicomechanical properties was thoroughly investigated, using X‐ray diffraction analysis, differential scanning calorimetry, mechanical, dynamic mechanical, and thermogravimetric analysis. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Banded spherulites in poly(L‐lactic acid): Effects of the crystallization temperature and molecular weight
Authors: Wang Yaming , Mano João F.
Published: May 2007

The spherulitic morphology of pure poly(L‐lactide) (PLLA) was investigated with polarized optical microscopy as a function of the crystallization temperature and molecular weight. After being melted at 210°C for 3 min, samples were cooled quickly to designated temperatures for isothermal crystallization. It was shown for the first time that a clear banding‐to‐nonbanding morphological transition took place at a critical temperature for PLLA with a number‐average molecular weight of 86,000. With the increasing molecular weight of the material, the spherulite growth rates decreased notably, and the band spacing decreased significantly. On the basis of the main‐chain chirality in PLLA and the observation of a nonbanded spherulitic morphology in a certain temperature region, it was suggested that the crystallization temperature might have an effect on the relationship between the sense of lamellar twisting and the main‐chain chiral structure in PLLA. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
Side chain functionality dominated the chromatography of N‐protected amino acid on molecularly imprinted polymer
Authors: Lin Yu‐Chi , Pan Hsin‐Hung , Hwang Ching‐Chiang , Lee Wen‐Chien
Published: May 2007

Molecularly imprinted polymer (MIP) with Nα‐protected amino acid as the print molecule was prepared and used as the stationary phase for the chromatographic study of molecular recognition. Particles of MIP were prepared by photopolymerization of 4‐vinylpyridine in the presence of tert‐butyloxycarbonyl‐L‐tyrosine (Boc‐L‐Tyr) and packed into a column for the chromatographic resolution of Boc‐L‐Tyr and tert‐butyloxycarbonyl‐L‐phenylalanine (Boc‐L‐Phe). These two Nα‐protected amino acids that differ from each other in the side chain with one hydroxyl group on the benzene ring could be well separated on the MIP. A separation factor of about two was achieved by using a mixture of acetonitrile (99.5 v/v %) and acetic acid (0.5 v/v %) as the mobile phase. Results suggest that the interaction between hydroxyl group in the side chain of amino acid and pyridine in the polymer dominated the selective adsorption of print molecule on the MIP. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
Single‐Crystalline and Near‐Monodispersed NaMF3 (M=Mn, Co, Ni, Mg) and LiMAlF6 (M=Ca, Sr) Nanocrystals from Cothermolysis of Multiple Trifluoroacetates in Solution
Authors: Du Ya‐Ping , Zhang Ya‐Wen , Yan Zheng‐Guang , Sun Ling‐Dong , Gao Song , Yan Chun‐Hua
Published: May 2007

We report the synthesis of single‐crystalline and near‐monodispersed NaMF3 (M=Mn, Co, Ni, Mg), LiMAlF6 (M=Ca, Sr), and NaMgF3:Yb,Er nanocrystals (quasisquare nanoplates, nanorods, and nanopolygons) by the cothermolysis of multiple trifluoroacetates in hot combined organic solvents (oleic acid, oleylamine, and 1‐octadecene). The nanocrystals were characterized by XRD, TEM, superconductive quantum interference device (SQUID), and upconversion luminescence spectroscopy. By regulating the polarity of the dispersant, the NaMF3 (M=Mn, Co, Ni) nanoplates were partially aligned to form nanoarrays on copper TEM grids. The sizes of the NaMF3 nanocrystals were easily tuned by the use of proper synthetic conditions such as reaction temperature and time and solvent composition. On the basis of a series of experiments in which the reaction conditions were varied, together with GC–MS and FTIR analysis, the reaction pathways for the formation of these nanocrystals from trifluoroacetate precursors were proposed. The magnetic measurements showed that the differently sized NaMnF3 square plates displayed interesting weak ferromagnetic behavior on the nanometer scale. The strong red upconversion luminescence emitted from the NaMgF3:Yb,Er nanorods under 980‐nm near‐IR laser excitation suggests that NaMgF3 may be a good candidate host material for red upconversion luminescence.
Human stem cells, chromatin, and tissue engineering: Boosting relevancy in developmental toxicity testing
Authors: Cho Elizabeth , Li Wan‐Ju
Published: May 2007

Risk assessment derives its confidence from toxicology research that is based on relevancy to human health. This article focuses on two highly topical areas of current scientific research, stem cells and chromatin biology, which present new avenues for preclinical and clinical applications, and the frontier role of tissue engineering and regeneration. Appreciating the utility and necessity of chromatin and human somatic stem cells as research tools and looking toward tissue engineering may close the uncertainty gaps between animal and human cross‐species toxicology evaluations. The focus will be on developmental toxicology applications, but appropriate extrapolation to any other areas of toxicology can be made. We further provide background on basic biology of these three areas and examples of how early life exposure to known and potential environmental toxicants induce malformations, childhood and adult‐onset diseases, through aberrant chromatin modification of critical gene expressions (acute lymphocyte leukemia, heavy‐metal nickel and cadmium‐associated defects, and reproductive tract malformations and carcinomas induced by the synthetic estrogen, diethylstilbestrol). Birth Defects Research (Part C) 81:20–40, 2007. © 2007 Wiley‐Liss, Inc.
Optimal treatment for severe neurogenic bowel dysfunction after chronic spinal cord injury: a decision analysis
Authors: Furlan J C , Urbach D R , Fehlings M G
Published: May 2007

Background

When conservative management fails in patients with chronic spinal cord injury (SCI) and neurogenic bowel dysfunction, clinicians have to choose from a variety of treatment options which include colostomy, ileostomy, Malone anterograde continence enema (MACE) and sacral anterior root stimulator (SARS) implantation. This study employed a decision analysis to examine the optimal treatment for bowel management of young individuals with chronic refractory constipation in the setting of chronic SCI.

Methods

A decision analysis was created to compare the four surgical strategies using baseline analysis, one-way and two-way sensitivity analyses, ‘worst scenario’ and ‘best scenario’ sensitivity analyses, and probabilistic sensitivity analyses. Quality-adjusted life expectancy (QALE) was the primary outcome.

Results

The baseline analysis indicated that patients who underwent the MACE procedure had the highest QALE value compared with the other interventions. Sensitivity analyses showed that these results were robust.

Conclusion

The MACE procedure may provide the best long-term outcome in terms of the probability of improving bowel function, reducing complication rates and the incidence of autonomic dysreflexia, and being congruent with patients' preferences. The analysis was sensitive to changes in assumptions about quality of life/utility, and thus the results could change if more specific estimates of utility became available.
Über Polyhalogenverbindungen. I. Mitteil.: Über den oxydierenden und äthoxylierenden Abbau des Perchlorhydrindens
Authors: Roedig Alfred
Published: May 2007

Durch oxydierenden und äthoxylierenden Abbau des Perchlorhydrindens wird dessen Konstitution erhärtet. Rauchende Salpeter‐säure oxydiert zur 2.3.4.5‐Tetrachlor‐6‐dichloracetyl‐benzoesäure. Zwischenstufen dieser Oxydation sind das Perchlor‐α.γ‐keto‐ und das Perchlor‐α‐γ‐diketo‐hydrinden. Die in der α‐,γ‐und β‐Stellung gehäuften Halogenatome des Perchlorhydrindens sind viel lockerer gebunden als die des aromatischen Kerns. Alkoholische Kalilauge bewirkt im Perchlor‐α.β.γ‐triäthoxy‐hydrinden eine maximal dreifache Äthoxylierung des Fünfrings und gleichzeitig eine Aufspaltung desselben zu Perchlor‐2‐[β‐äthoxy‐vinyl]‐benzoesäure. Der Mechanismus dieser Ringspaltung wird ausgehend von dem als Zwischenstufe isolierten Perchlor‐β‐äthoxy‐hydrinden besprochen.
Synthesen von 2.3‐Dioxy‐naphthochinonen aus substituierten o‐Phthalaldehyden und Glyoxal
Authors: Weygand Friedrich , Vogelbach Kurt , Zimmermann Konrad
Published: May 2007

Durch Oxydation von substituierten o‐Xylolen mit Chromsäure‐anhydrid in Essigsäureanhydrid‐Schwefelsäure nach Thiele und Winter gelang die Darstellung von substituierten o‐Phthalaldehyd‐tetraacetaten, deren Hydrolyse die Phthalaldehyde selbst ergab. Auch durch Oxydation von o‐Phthalalkoholen und durch Ozonisation von Naphthalin‐Derivaten wurden o‐Phthalaldehyde gewonnen. Deren Kondensation mit Glyoxal in Gegenwart von Cyan Ionen führte in sodaalkalischer Lösung unter Dehydrierung zu substituierten 2.3‐Dioxy‐naphthochinonen. Die Reaktion zwischen o‐Phthalaldehyd und Glyoxal zu Isonaphthazarin unter dem katalytischen Einfluß von Cyanid läßt sich zum spezifischen Mikronachweis von Cyanid (0.2 γ CN− ) und von Glyoxal (<0.6 mg) heranziehen.
Über einen neuen, gegen Vogelmalaria wirksamen Verbindungstypus
Authors: Salzer Walter , Timmler Helmut , Andersag Hans
Published: May 2007

In 4‐Oxy‐ bzw.‐Mercapto‐2.3‐dialkyl‐chinolinen wurde ein Typus von Verbindungen aufgefunden, die bei malariainfizierten Kanarienvögeln Heilwirkung zeigen. Die Spezifität dieser Wirksamkeit wurde abgegrenzt. Beim Konstitutionsbeweis wurde eine neue Bildungsweise von Isatinen gefunden.
Über basisch substituierte Xanthon‐ und Thioxanthon‐Abkömmlinge; Miracil, ein neues Chemotherapeuticum
Authors: Mauss Hans
Published: May 2007

In basisch alkylierten 1‐Amino‐4‐methyl‐xanthonen bzw.‐thioxanthonen und ihren Substitutionsprodukten wurden Chemotherapeutica aufgefunden, die sich im Tiertest als wirksam bei der Bilharziose (Schistosomiasis) erwiesen.
1.2,3.4‐Dibenz‐pentacen und seine Untersuchung nach dem Anellierungsverfahren (Aromatische Kohlenwasserstoffe, XLV. Mitteilung)
Authors: Clar Erich , Frömmel Helmut
Published: May 2007

Benzophenon‐tricarbonsäure‐(2.4.5)‐anhydrid wird mit Oktahydro‐phenanthren kondensiert, die Diketo‐dicarbonsäure reduziert, doppeltem Ringschluß unterworfen und das erhaltene Dihydro‐dibenz‐pentacen zum 1.2,3.4‐Dibenz‐pentacen dehydriert, dessen Absorptionsspektrum nach dem Anellierungsverfahren analysiert wird.
Beitrag zur Kenntnis der Polyen‐diketone
Authors: Schlenk Hermann
Published: May 2007

Durch Kondensation von Diacetyl mit Furfurol, Zimtaldehyd und dessen Vinylogen in Gegenwart von Piperidinacetat wurden ungesättigte Polyen‐diketone dargestellt. Bei den niederen Gliedern entstanden die beiderseitig substituierten Derivate, beim 7‐Phenyl‐heptatrienal das Gemisch des einseitig substituierten Methyl‐diketons mit dem symmetrischen Substitutionsprodukt, beim 11‐undecapentaenal nur das einseitig substituierte Derivat. Die Ergebnisse werden denen von P. Karrer, Ch. Cochand und N. Neuß gegenübergestellt; Piperidin‐Ion ist als Katalysator wirksamer als Piperidin.
Zur Kenntnis der β‐dicarbonyl‐Verbindungen, I. Mitteil.: Abhängigkeit der Farbe der Eisenchlorid‐Reaktion von der Konstitution
Authors: Henecka Hans
Published: May 2007

Es wird eine bei β‐Keto‐carbonsäureestern und β–Diketonen allgemein gültige Regel beschrieben, wonach α‐Monosubstitution durch neutrale Reste eine Rotverschiebung des Extinktionsmaximums der Farbe der Eisenchlorid‐Reaktion dieser Verbindungen bewirkt, während elektromer und protonlockernd wirkende α‐Substituenten eine Blauverschiebung dieses Maximums erzeugen.
Über eine neue Gruppe von organischen Phosphorverbindungen
Authors: Schmidt Hans
Published: May 2007

Aus Aminen, Ketonen bzw. Aldehyden und Unterphosphoriger Säure entsteht eine bisher unbekannte Gruppe von organischen Phosphorverbindungen, die α‐Alkyl(aryl)amino‐alkyl‐phosphinigen Säuren R · NH · C(R′)(R″)·PH(O)·OH.
Über Chalkone, I. Mitteil.: Zur Darstellung von Chalkonen
Authors: Schraufstätter Ernst , Deutsch Sigismund
Published: May 2007

Die Darstellungsmöglichkeiten von Chalkonen werden auf ihre Brauchbarkeit geprüft und eine größere Anzahl substituierter Chalkone erstmalig beschrieben. Die Reaktionsfähigkeit der Ausgangsmaterialien wird diskutiert und auf die in manchen Fällen leicht eintretende Umwandlung von Chalkonen zu Flavanonen hingewiesen.

Mit Hilfe der polarographischen Bestimmung konnte eine eindeutige Unterscheidung zwischen Chalkonen und Flavanonen erreicht und der Nachweis beider Verbindungsformen nebeneinander ermöglicht werden. Ferner wurde die Bildungsgeschwindigkeit eines Chalkons polarographisch untersucht.
Über die Umwandlung der cyclischen Kondensationsprodukte des Crotonaldehyds und ähnlicher Stoffe in aromatische Verbindungen
Authors: Grundmann Christoph
Published: May 2007

Dihydro‐o‐toluylalkohol spaltet leicht Wasser ab unter Bildung von o‐Xylol; die Reaktion läßt sich auf Homologe übertragen. Der aus Crotonaldehyd leicht zugängliche Dihydro‐o‐toluylaldehyd liefert beim Überleiten über Dehydrierungskatalysatoren o‐Xylol und Toluol.
Darstellung von l‐Weinsäure
Authors: Scheuing Georg , Konz Wilhelm
Published: May 2007

d‐Xylose wird mit Sauerstoff zu d‐Threonsäsure abgebaut und diese mittels Salpetersäure oxydiert.
Eine Synthese einfacher heterocyclischer Verbindungen
Authors: Dornow Alfred , Peterlein Karl
Published: May 2007

Es wid die Verwendung von β‐Äthoxy‐acrolein‐diäthylacetal zur synthese einfacher heterocyclischer Verbindungen beschrieben.
Über die Anlagerung von Aminen an Styrol. Eine einfache Methode zur Darstellung von N‐substituierten β‐Phenyl‐äthylaminen
Authors: Wegler Richard , Pieper Gustav
Published: May 2007

Ammoniak, primäre und sekundäre Amine lagern sich an Styrol und seine im Kern oder in der Seitenkette substituierten Derivate in Gegenwart katalytischer Mengen Alkalimetall an. Dabei entstehen in teilweise recht guten Ausbeuten β‐Phenyl‐äthylamin und seine Substitutionsprodukte.
Über Thiazole, IV. Mitteil.: Versuche zur Synthese von Thiazolylbarbitursäuren
Authors: Beyer Hans , Höhn Hans
Published: May 2007

Das Ziel der Untersuchungen ist die Einführung des Thiazolringsystems in die 5‐Stellung der Barbitursäure und die Prüfung seines pharmakologischen Einflusses auf die hypnotische Wirkung dieser Stoffklasse. Im folgenden werden die auf verschiedenen Wegen gewonnenen Zwischenprodukte zur Synthese von Thiazolylbarbitursäuren beschrieben.
Beitrag zur Mannich‐Reaktion
Authors: Jäger Herbert , Arenz Marianne
Published: May 2007

Mono‐ und Dialkanolamine lassen sich wie andere primäre und sekundäre Amine zu Mannich‐Kondensationen verwenden.
Über die Estersäuren von Oximen und ihre analytische Verwendung
Authors: Treibs Wilhelm , Röhnert Helmut
Published: May 2007

Die Oxime von Ketonen lassen sich in saure Ester von Dicarbonsäuren überführen, wobei aliphatisch‐aromatische Oxime eine erheblich geringere Umsetzungsneigung zeigen als aliphatische und isocyclische. Das Verfahren eignet sich zur Herausarbeitung von Ketonen aus natürlichen Gemischen.
Notiz über die Darstellung einiger Isoalloxazine
Authors: Fernholz Marie‐Elisabeth , Fernholz Hans
Published: May 2007

Es wird die Darstellung einiger Derivate des Isoalloxazins beschrieben.
Die Oxydation von Pyridinhomologen in der Gasphase
Authors: Mathes Wilhelm , Sauermilch Walter , Klein Theo
Published: May 2007

Die Oxydation von Pyridinhomologen in der Gasphase läßt sich so steuern, daß folgende Reaktionen vorherrschen: 1.) Mit Sauerstoffunterschuß: Bildung von Pyridoinen (über Pyridinaldehyde), 2.) mit abgestimmter Sauerstoffmenge: Pyridinaldehyde, 3.) mit Sauerstoffüberschuß: Abbau zum Pyridin über Pyridincarbonsäuren.
Investigation of Soot Formation During Partial Oxidation of Diesel Fuel
Authors: Roth K. , Wirtz S. , Scherer V. , Nastoll W.
Published: May 2007

Soot formation during partial oxidation is a major issue for hydrogen production from liquid hydrocarbon fuels. Measurements were made to investigate the sooting behavior of diesel fuel under variation of the main operating parameters temperature (T = 800 to 1300 °C), pressure (p = 1 to 3 bar), equivalence ratio (Φ =1 to 3), and steam ratio (H2O/C = 0.2 to 0.6) at constant residence time. The experimental setup was a perfectly stirred/plug flow reactor (PSR/PFR system) providing conditions close to reality. The study proves that soot growth rate strongly depends on temperature, pressure, and equivalence ratio while adding water has a minor effect on soot growth. Experimental results were compared with a kinetic model developed by the Institut Français du Pétrole (IFP), predicting soot formation during the partial oxidation of liquid hydrocarbon fuels. The calculated amount of soot shows good agreement with the measured data.
Control of the Molecular Weight Distribution of Petroleum Pitches via Dense‐Gas Extraction
Authors: Cervo E. G. , Thies M. C.
Published: May 2007

Dense‐gas extraction (DGE) was used to fractionate an isotropic petroleum pitch (number‐average molecular weight Mn = 516) into oligomeric cuts. A countercurrent‐flow packed column was used to effect the separation, with supercritical toluene being used as the dense‐gas solvent and commercially available M‐50 or A‐240 pitch being used as the feed. Isothermal operation at 330, 350, and 380 °C was investigated, as well as operation with a linear positive temperature gradient (+ΔT), with the bottom of the column at 330 and the top at 380 °C. For isothermal operation, the molecular weight distribution of the bottom products consisted primarily of dimer (Mn = 508) and trimer (Mn = 759) species, with pressure changes of as little as 5 bar producing significant changes in their relative distribution, as observed by MALDI mass spectrometry. On the other hand, by operating with a +ΔT, we could produce a bottom product consisting primarily of trimers and tetramers (Mn = 997).
Catalytic Combustion of Methane over Mn‐Substituted Ba‐La‐Hexaaluminate Nanoparticles.
Authors: Li Shunqing , Wang Xiaolai
Published: May 2007

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 Characterization of the Homoleptic Octahydrotriborate Complex Cr(B3H8)2 and Its Lewis Base Adducts.
Authors: Goedde Dean M. , Windler G. Kenneth , Girolami Gregory S.
Published: May 2007

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.
Chemistry of Enediynyl Azides: Activation Through a Novel Pathway.
Authors: Basak Amit , Roy Sandip K. , Das Sanket , Hazra Amrita B. , Ghosh Subhash C. , Jha Shailendra
Published: May 2007

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 Aromatic Cycloketones via Intramolecular Friedel—Crafts Acylation Catalyzed by Heteropoly Acids.
Authors: Lan Kun , Fen Shao , Shan Zixing
Published: May 2007

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.
N‐Functionalization of Azoles Through Coupling Reactions with Alkoxydienyl and Alkoxystyryl Boronic Esters.
Authors: Deagostino Annamaria , Prandi Cristina , Zavattaro Chiara , Venturello Paolo
Published: May 2007

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.
Scandium Triflate Catalyzed Transesterification of Carboxylic Esters.
Authors: Remme Nicole , Koschek Katharina , Schneider Christoph
Published: May 2007

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 Novel Approach for the Synthesis of Alkyl and Aryl Sulfonamides.
Authors: Shaabani Ahmad , Soleimani Ebrahim , Rezayan Ali Hossein
Published: May 2007

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.
DMAP‐Organocatalyzed O‐Silyl—O‐(or C‐)‐benzoyl Interconversions by Means of Benzoyl Fluoride.
Authors: Poisson Thomas , Dalla Vincent , Papamicael Cyril , Dupas Georges , Marsais Francis , Levacher Vincent
Published: May 2007

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.
Crotylation of (R)‐2,3‐Cyclohexylideneglyceraldehyde: A Simple Strategy for the Synthesis of Enantiopure anti‐Alzheimer (R)‐Arundic Acid.
Authors: Goswami Dibakar , Chattopadhyay Angshuman
Published: May 2007

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 Facile Synthesis of α,α′‐Bis(substituted‐benzylidene)cycloalkanones and Substituted‐Benzylidene Heteroaromatics: Utility of NaOAc as a Catalyst for Aldol‐Type Reaction.
Authors: Rahman A. F. M. Motiur , Jeong Byeong‐Seon , Kim Dong Hyeon , Park Jung Ki , Lee Eung Seok , Jahng Yurngdong
Published: May 2007

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.
Efficient Hydroxycarbonylation of Aryl Iodides Using Recoverable and Reusable Carbon Aerogels Doped with Palladium Nanoparticles as Catalyst.
Authors: Cacchi Sandro , et al. et al.
Published: May 2007

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.
Catalytic One‐Pot, Three‐Component Acyl‐Strecker Reaction.
Authors: Pa Subhas Chandra , List Benjamin
Published: May 2007

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 Facile Stereoselective Synthesis of 1,3‐Dienyl Sulfones via Stille Coupling Reactions of (E)‐α‐Stannylvinyl Sulfones with Alkenyl Iodides.
Authors: Cai Ming‐Zhong , Chen Gui‐Qin , Hao Wen‐Yan , Wang Dong
Published: May 2007

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 Novel Approach to the Synthesis of Benzo[b]fluoren‐11‐ones.
Authors: Martinez Ana , Barcia Jose C. , Estevez Amalia M. , Fernandez Fernando , Gonzalez Lucia , Estevez Juan C. , Estevez Ramon J.
Published: May 2007

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.
Partially Fluorinated Heterocycles from 4,4‐Bis(trifluoromethyl)‐hetero‐1,3‐dienes via C—F Bond Activation — Synthesis of 2‐Fluoro‐3‐(trifluoromethyl)furans.
Authors: Burger Klaus , Helmreich Brigitte , Hennig Lothar , Spengler Jan , Albericio Fernando , Fuchs Annett
Published: May 2007

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.
Novel Synthetic Methodologies. Part 120. Efficient Conjugate Addition of 1H‐Indoles to Electron‐Deficient Olefins Catalyzed by Silica‐Supported Sodium Hydrogen Sulfate (NaHSO4×SiO2).
Authors: Das Biswanath , Damodar Nikhil Chowdhury K. , Reddy K. Ravinder
Published: May 2007

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 Oxazolidinones in Supercritical CO2 under Heterogeneous Catalysis.
Authors: Maggi Raimondo , Bertolotti Chiara , Orlandini Emilia , Oro Chiara , Sartori Giovanni , Selva Maurizio
Published: May 2007

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, Structure, and Biological Activity of Novel 1H‐1,2,4‐Triazol‐1‐yl‐thiazole Derivatives.
Authors: Shao Ling , Zhou Xin , Zhang Qing , Liu Jiang‐Bing , Jin Zhong , Fang Jian‐Xin
Published: May 2007

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 Indolizine Templates from the Ugi Reaction.
Authors: El Kaim Laurent , Gizolme Marie , Grimaud Laurence
Published: May 2007

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 Approach to the Synthesis of Macrocyclic Tetralactones via Ring‐Closing Metathesis Using Grubbs′ First‐Generation Catalyst.
Authors: Muthusamy Sengodagounder , Gnanaprakasam Boopathy , Suresh Eringathodi
Published: May 2007

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.
ω‐Alkyne‐Mono‐ and Diphosphonates — Synthesis and Sonogashira Cross‐Coupling Reaction with Aryl Halides.
Authors: Delain‐Bioton Lise , Villemin Didier , Jaffres Paul‐Alain
Published: May 2007

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 γ‐Butyrolactones Containing α,α‐Difluoromethylenyl Bisphosphonate Initiated by Na2S2O4.
Authors: Yang Xueyan , Zhu Yaoping , Fang Xiang , Yang Xianjin , Wu Fanhong , Shen Yongjia
Published: May 2007

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.
Two New Eudesmanolides from Sphaeranthus indicus (Linn).
Authors: Jadhav Ravindra B. , Sonawane Kiran B. , Deshpande Nirmala R. , Rojatkar Supada R.
Published: May 2007

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.
Total Synthesis of Peribysin E Necessitates Revision of the Assignment of Its Absolute Configuration.
Authors: Angeles Angie R. , Dorn David C. , Kou Cynthia A. , Moore Malcolm A. S. , Danishefsky Samuel J.
Published: May 2007

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.
Reversing Dane′s Strategy: A New, Concise, Enantioselective Synthesis of the Steroid Nucleus.
Authors: Gelman Danny M. , Mayes Penelope A. , Mulder Roger , Perlmutter Patrick
Published: May 2007

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 L‐ido‐Configured Six‐ and Seven‐Membered Carba‐Sugars.
Authors: Ramana C. V. , Chaudhuri Siddhartha R. , Gurjar Mukund K.
Published: May 2007

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.
Biosynthesis of the 2‐Pyridone Tenellin (I) in the Insect Pathogenic Fungus Beauveria bassiana.
Authors: Eley Kirstin L. , Halo Laura M. , Song Zhongshu , Powles Henry , Cox Russell J. , Bailey Andrew M. , Lazarus Colin M. , Simpson Thomas J.
Published: May 2007

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.
Electrochemical Synthesis and Application of NF3
Authors: Tasaka Akimasa
Published: May 2007

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.
Syntheses and Properties of Fluorinated Carbon Materials
Authors: Lee Young‐Seak
Published: May 2007

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.
Synthetic Metallomolecules as Agents for the Control of DNA Structure
Authors: Richards Adair D. , Rodger Alison
Published: May 2007

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.
“Magic Bullets” for Bone Diseases: Progress in Rational Design of Boneseeking Medicinal Agents
Authors: Zhang Sufeng , Gangal Geeti , Uludag Hasan
Published: May 2007

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.
Multiphasic Heterogeneous Catalysis Mediated by Catalyst‐Philic Liquid Phases
Authors: Tundo Pietro , Perosa Alvise
Published: May 2007

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, Coordination Properties, and Analytical Applications of Mixed Donor Macrocycles Containing the 1,10‐Phenanthroline Subunit
Authors: Lippolis V. , Shamsipur M.
Published: May 2007

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.
Chemoenzymatic and Template‐Directed Synthesis of Bioactive Macrocyclic Peptides
Authors: Gruenewald Jan , Marahiel Mohamed A.
Published: May 2007

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 Synthesis of Heterocycles Using Sulfinimines (N‐Sulfinyl Imines)
Authors: Davis Franklin A. , Yang Bin , Deng Jiang , Zhang Junyi
Published: May 2007

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.
Amide‐Based Molecular Shuttles
Authors: Berna Jose , Bottari Giovanni , Leigh David A. , Perez Emilio M.
Published: May 2007

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.
Pd—N‐Heterocyclic Carbene (NHC) Catalysts for Cross‐Coupling Reactions
Authors: Kantchev Eric Assen B. , O'Brien Christopher J. , Organ Michael G.
Published: May 2007

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.
Microwave‐Assisted High‐Throughput Chemistry in Lead Generation and Optimization
Authors: Giardina G. A. M. , Martinelli M. , Mortoni A. , Regalia N. , Gagliardi S.
Published: May 2007

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 Methodologies for the Synthesis of Oligopeptides and Conformation‐Constrained Peptidomimetics
Authors: Chiba Kazuhiro
Published: May 2007

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 Growing Impact of Titanocene(III)‐Mediated Radical Epoxide Opening on the Synthesis of Natural Products
Authors: Cuerva J. M. , Justicia J. , Oller‐Lopez J. L. , Bazdi B. , Oltra J. E.
Published: May 2007

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.
Hypervalent Iodine Mediated Ring Contraction Reactions
Authors: Silva, Luiz F. Jr.
Published: May 2007

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 Role of the Functional Group in Double Bond Migration of Allylic Systems Catalyzed by Ruthenium Hydride Complexes
Authors: Krompiec S. , Kuznik N. , Krompiec M. , Penczek R. , Mrzigod J. , Torz A.
Published: May 2007

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.
Polymer‐Supported Reagents: Preparation and Use in Parallel Organic Synthesis.
Authors: Hinzen Berthold , Hahn Michael G.
Published: May 2007

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.
1‐Nitrogen‐Functionalized Alk‐1‐ynes
Authors: Witulski B. , Alayrac C.
Published: May 2007

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.
1‐(Organooxy)alk‐1‐ynes and 1‐(Heterooxy)alk‐1‐ynes
Authors: Witulski B. , Alayrac C.
Published: May 2007

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.
1,1‐Bis(organoselanyl)alk‐1‐enes and Derivatives
Authors: Yoshimatsu M.
Published: May 2007

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 Transglycosylation Activity of the Recombinant from Mucor Hiemalis in Media Containing Organic Solvents
Authors: Akaike Eri , Yamanoi Takashi
Published: May 2007

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.
Induction chemotherapy selects patients with locally advanced, unresectable pancreatic cancer for optimal benefit from consolidative chemoradiation therapy
Authors: Krishnan Sunil , Rana Vishal , Janjan Nora A. , Varadhachary Gauri R. , Abbruzzese James L. , Das Prajnan , Delclos Marc E. , Gould Morris S. , Evans Douglas B. , Wolff Robert A. , Crane Christopher H.
Published: May 2007

BACKGROUND.

The current study was conducted to determine whether there were differences in outcome for patients with unresectable locally advanced pancreatic cancer (LAPC) who received treatment with chemoradiation therapy (CR) versus induction chemotherapy followed by CR (CCR).

METHODS.

Between December 1993 and July 2005, 323 consecutive patients with LAPC were treated at the authors' institution with radiotherapy and concurrent gemcitabine or fluoropyrimidine chemotherapy. Two hundred forty‐seven patients received CR as initial treatment, and 76 patients received a median of 2.5 months of gemcitabine‐based induction chemotherapy prior to CR. Most patients received a radiation dose of 30 grays in 10 fractions (85%) concurrently with infusional 5‐fluorouracil (41%), gemcitabine (39%), or capecitabine (20%).

RESULTS.

The median follow‐up was 5.5 months (range, 1–63 months). For all patients, the median overall survival (OS) and progression‐free survival (PFS) were 9 months and 5 months, respectively, and the 2‐year estimated OS and PFS rates were 9% and 5%, respectively. The median OS and PFS were 8.5 months and 4.2 months, respectively, in the CR group and 11.9 months and 6.4 months, respectively, in the CCR group (both P < .001). The median times to local and distant progression were 6.0 months and 5.6 months, respectively, in the CR group and 8.9 and 9.5 months, respectively, in the CCR group (P = .003 and P = .007, respectively). There was no significant difference in the patterns of failure with the use of induction chemotherapy.

CONCLUSIONS.

The results from this analysis indicated that, by excluding patients with rapid distant progression, induction chemotherapy may select patients with LAPC for optimal benefit from consolidative CR. The authors believe that this strategy of enriching the population of patients who receive a locoregional treatment modality merits prospective randomized evaluation. Cancer 2007. © 2007 American Cancer Society.
Birth weight and risk of cancer
Authors: Ahlgren Martin , Wohlfahrt Jan , Olsen Lina W. , Sørensen Thorkild I.A. , Melbye Mads
Published: May 2007

BACKGROUND.

It is well established that prenatal biologic processes are important for the development of some childhood cancers, whereas less is known regarding their influence on adult cancer risk. High birth weight has been associated with risk of breast cancer, whereas studies of other specific cancers and all cancers together have been less conclusive.

METHODS.

The authors established a cohort of more than 200,000 men and women who were born between 1936 and 1975. Birth weights were obtained from school health records and information concerning cancer from the Danish Cancer Registry. Follow‒up was performed between April 1, 1968 and December 31, 2003. During 6,975,553 person‐years of follow‒up, a total of 12,540 primary invasive cancers were diagnosed.

RESULTS.

Analyses of site‒specific cancers revealed that the majority of cancers had a positive linear association with birth weight. Departures from a positive linear association were found to be statistically significant for cancers of the pancreas and bladder, which demonstrated a V‒shaped association, and testicular cancer, which demonstrated an inverse association with birth weight. Excluding these 3 exceptions, the trends for the individual cancer sites were not heterogeneous, and the overall trend was a relative risk of 1.07 (95% confidence interval, 1.03–1.11) per 1000‒g increase in birth weight. This trend was the same in men and women and in all age groups.

CONCLUSIONS.

A 7% increase in cancer risk was observed per 1000‒g increase in birth weight. Few cancers demonstrated a nonlinear association with birth weight, and testicular cancer was found to be negatively associated with birth weight. The authors hypothesized that the biologic explanation behind the association between birth weight and cancer at different sites should be sought in a common pathway. Cancer 2007. © 2007 American Cancer Society.
Neuroanatomical relations of prothoracicotropic hormone neurons with the circadian timekeeping system in the brain of larval and adult Rhodnius prolixus (Hemiptera)
Authors: Vafopoulou Xanthe , Steel Colin G.H. , Terry Katherine L.
Published: May 2007

This paper reports the localization in the Rhodnius prolixus brain of neurons producing the key neuropeptide that regulates insect development, prothoracicotropic hormone (PTTH) and describes intimate associations of the PTTH neurons with the brain circadian timekeeping system. Immunohistochemistry and confocal laser scanning microscopy revealed that the PTTH‐positive neurons in larvae are located in a single group in the lateral protocerebrum. Their number increases from two in the last larval instar to five during larval‐adult development. In adults, there are two distinct groups of these neurons composed of two cells each. A daily rhythm in content of PTTH‐positive material occurs in both the somata and the axons in both larval and adult stages. These rhythms correlate with previous evidence of a circadian rhythm of PTTH release from brains in vitro. The key circadian clock cells of Rhodnius are eight neurons, which co‐express pigment‐dispersing factor (PDF) and the canonical clock proteins PER and TIM; PDF fills the axons. Equivalent cells control behavioral rhythms in other insects. Double labeling revealed intimate associations between axons of larval PTTH neurons and clock neurons, indicating a neuronal pathway from the brain timekeeping system for circadian control of PTTH release. Additional PDF neurons appear in the adult, associated with the second group of PTTH neurons. These findings provide the first direct evidence that neurons of the insect brain timekeeping system control hormone rhythms. The range of functions regulated by this timekeeping system is quite similar to those of the vertebrate suprachiasmatic nucleus, for which the insect system is a valuable model. J. Comp. Neurol. 503:511–524, 2007. © 2007 Wiley‐Liss, Inc.
Lay inferences of personality traits: The role of behaviour prototypicality and between‐trait differences
Authors: Wojciszke Bogdan , Pienkowski Ryszard , Maroszek Andrzej , Brycz Hanna , Ratajczak Marlena
Published: May 2007

In Study 1, 60‐item sets of behavioural acts exemplifying a personality trait were elicited for each of 40 traits. Each set of behaviours was then rated by 66 students for their inferential meaning (prototypicality) and evaluative meaning (valence). As predicted, the traits differed in the degree of congruence between the two meanings of their exemplifications. In Study 2, 80 subjects were presented with behaviour descriptions varying in their prototypicality for congruent or incongruent traits, and were asked for trait inferences and evaluations. The higher prototypicality, the more the inferred traits were similar to the original ‘criterion’ traits and the more extreme were the ascriptions of those freely inferred traits. As predicted on the basis of accentuation theory, behaviours exemplifying congruent traits led to more extreme trait inferences and evaluations than behaviours exemplifying incongruent traits. We conclude that trait inferences and evaluations are based both on prototypicality of behavioural acts and on structural properties of the traits examplified by these acts.