bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tin(II) Doped Anatase (TiO2) Nanoparticles: A Potential Route to “Greener” Yellow Pigments
Authors: Ghosh Moumita , Pralong V. , Wattiaux A. , Sleight A. W. , Subramanian M. A. 
Published: March 2009

AbstractBenign by design: Tin(II) doped anatase TiO2 nanoparticles, a potential candidate as environmentally benign yellow pigments, have been synthesized. The presence of Sn2+ in anatase structure has been confirmed by various analytical techniques including optical and 119Sn Mössbauer spectroscopy.magnified imageDuring our exploration of compounds in the SnII‐TiIV‐O system, we discovered that hydrolysis of titanium alkoxide solution in the presence of SnII salts resulted in stable deep‐yellow colored anatase nanoparticles. The samples were characterized by X‐ray powder diffraction, electron microprobe, thermal analysis, transmission electron microscopy, and 119Sn Mössbauer spectroscopy. Mössbauer data of the yellow colored samples showed the presence of both SnII and SnIV in a distorted environment as expected in the anatase structure. It is suggested that the cationic charge imbalance is compensated by oxygen vacancies and/or hydroxyl groups as evidenced by Mössbauer data which show two types of SnII environments. When heated in air to 300 °C the samples changed color to completely white and 119Sn Mössbauer data of these samples showed only the presence of SnIV. These observations indicate that the origin of the yellow color in our Sn doped anatase nanoparticles arises from filled Sn 5s states just above the O 2p band, thus decreasing the band gap. The SnII doped anatase TiO2 nanoparticles reported here can potentially lead to environmentally benign yellow pigments. The simplistic nature of the synthetic procedure could easily be adapted to large‐scale industrial manufacture.
Spermatogonial stem cells: Mouse and human comparisons
Authors: Dym Martin , Kokkinaki Maria , He Zuping 
Published: March 2009

AbstractSpermatogonial stem cells (SSCs) have unique characteristics in that they produce sperm that transmit genetic information from generation to generation and they can be reprogrammed spontaneously to form embryonic stem (ES)‐like cells to acquire pluripotency. In rodents, it is generally believed that the A‐single (As) is the stem cell population, whereas the A‐paired (Apr) and A‐aligned (Aal) represent the progenitor spermatogonial population. The A1 to A4 cells, intermediate, and type B spermatogonia are considered differentiated spermatogonia. In human, very little information is available about SSCs, except for the earlier work of Clermont and colleagues who demonstrated that there are two different types of A spermatogonia, the Adark and Apale spermatogonia. The Adark spermatogonia were referred to as the reserve stem cells, whereas the Apale were considered the renewing stem cells. In this review, we outline several spermatogonial renewal schemes for both rodents and primates, including man. We also compare phenotypic markers for spermatogonia/spermatogonial stem cells in rodents and humans and address SSC potential and therapeutic application. Birth Defects Research (Part C) 87:27–34, 2009. © 2009 Wiley‐Liss, Inc.
Signaling pathways in spermatogonial stem cells and their disruption by toxicants
Authors: Lucas Benjamin , Fields Christopher , Hofmann Marie‐Claude 
Published: March 2009

AbstractSpermatogenesis is a complex biological process that is particularly sensitive to environmental insults such as chemicals and physical stressors. Exposure to specific chemicals has been shown to inhibit fertility through a negative impact on germ cell proliferation and differentiation that can lower sperm count. In addition, toxicants might produce DNA damages that could have negative consequences on the development of the offspring. This review describes spermatogonial stem cell development in the testis, signaling pathways that are crucial for self‐renewal, and possible target molecules for environmental toxicants such as phthalate esters and nanoparticles. Birth Defects Research (Part C) 87:35–42, 2009. © 2009 Wiley‐Liss, Inc.
Dietary vitamin E deficiency increases anxiety‐related behavior in rats under stress of social isolation
Authors: Okura Yuki , Tawara Satoshi , Kikusui Takefumi , Takenaka Asako 
Published: March 2009

AbstractIt has been demonstrated that vitamin E deficiency from birth increases anxiety‐related behavior using knockout animals with no vitamin E transfer proteins. The current study was undertaken to elucidate the effect of dietary vitamin E deficiency on anxiety‐related behavior of rats in different housing conditions. Male Wistar strain rats were divided into two groups during the weaning period and fed a control or vitamin E‐deficient diet. All rats were housed in groups (three rats per cage) for 3 weeks. In the fourth week, half of the rats in each dietary treatment were kept in social housing and the other half were kept in individual housing. Before sacrifice, rota‐rod and elevated plus‐maze (EPM) tests were performed to measure motor coordination and anxiety, respectively. The EPM test revealed that vitamin E‐deficient rats spent less time in the open arms and showed more stretch‐out posture than the control rats, showing that anxiety increased with dietary vitamin E deficiency. Furthermore, vitamin E deficiency‐induced anxiety behavior was observed more prominent in individual housed rats than in social housed rats. On the basis of these results, we conclude that dietary vitamin E deficiency induces anxiety in rats especially under stress of social isolation. © 2009 International Union of Biochemistry and Molecular Biology, Inc.
The problem of direct lymph drainage of the bronchopulmonary segments into the mediastinal and hilar lymph nodes
Authors: Topol Mirosław , Masłoń Adrian 
Published: March 2009

AbstractThe phenomenon of skip metastases depends on the occurrence of direct metastases of non‐small cell lung cancer into mediastinal lymph nodes without the involvement of hilar lymph nodes. The medical literature suggests that this prevalence ranges between 13 and 37.8% of cases. The goal of our study was to evaluate the prevalence of subpleural superficial lymphatic vessels carrying the lymph from the bronchopulmonary segments directly to the mediastinal nodes thus skipping the hilar nodes and determine whether there is a tendency towards differentiation in lymph drainage between males and females. During autopsy, 27 left and 27 right lungs were removed from 19 male and eight female cadavers. The lymphatic vessels were visualized at the mediastinal and interlobar surface of the lung by visual inspection. These vessels were then cannulated and injected with drawing ink. The first lymph node to become ink‐colored via injection was dissected and histologically examined. The lymph flowed into hilar lymph nodes in 79.5% of the cases and into the mediastinal nodes in 20.5% of all the 83 vessels injected; of these 13.2% were from the right lung and in 7.2% from the left lung. The upper right lobe (5/14 vessels) and its anterior segment (3/14 vessels) were the most common source of the direct lymph drainage to the mediastinum. Vessels of 15.4% in female cadavers (4/26) and 22.8% vessels in male cadavers (13/57) traveled directly to mediastinal nodes skipping the hilar nodes. This difference was not statistically significant. Clin. Anat. 22:509–516, 2009. © 2009 Wiley‐Liss, Inc.
Probing Mutation‐Induced Structural Perturbations by Refinement Against Residual Dipolar Couplings: Application to the U4 Spliceosomal RNP Complex
Authors: Kirkpatrick John P. , Li Ping , Carlomagno Teresa 
Published: March 2009

AbstractRDCs to the rescue: Residual dipolar couplings represent easily accessible structural information that can be used to rapidly assess the structural integrity of mutated proteins. A simple protocol involving refinement of a wild‐type structure against RDCs in combination with noncrystallographic symmetry restraints rapidly generates a model for the mutated protein and provides valuable structural information for interpreting mutagenesis experiments.magnified imageConfident interpretation of biochemical experiments performed with mutated proteins relies on verification of the integrity of the mutant structures. We present a simple and rapid refinement protocol for comparing the structures of mutated and wild‐type proteins. Our approach involves measurement of residual dipolar couplings, and only requires assignment of the backbone resonances of the mutant species. We demonstrate application of the protocol to a mutant of the 15.5K protein, a core component of the U4 spliceosomal ribonucleoprotein (RNP) complex. Confirmation of the unperturbed structure of the mutated protein prompted re‐examination of a previous mutagenesis study and indicated that the interpretation of mutant binding affinities in terms of direct interfacial contacts should be applied with caution.
β‐Substituted Terthiophene [2]Rotaxanes
Authors: Ikeda Taichi , Higuchi Masayoshi , Kurth Dirk G. 
Published: March 2009

AbstractTowards polythiophene polyrotaxanes: The β‐substituted terthiophene [2]rotaxanes have been synthesized (see figure). Basic optical and electrochemical properties of the synthesized [2]rotaxanes are also reported.magnified imageTwo kinds of β‐substituted terthiophene [2]rotaxanes were synthesized using the host‐guest pairs of the electron‐deficient cyclophane cyclobis(paraquat‐p‐phenylene) (CBPQT4+) and the electron‐rich terthiophenes with diethyleneglycol chains at the β‐position. One is made from the α‐position non‐substituted terthiophene (3 T‐β‐Rx) and the other is made from the α‐dibromo‐substituted terthiophene (3 TBr‐β‐Rx). The binding constants of the β‐substituted terthiophene threads were confirmed to be smaller than that of the α‐substituted terthiophene analogue. By UV/Vis absorption measurements, we confirmed the charge‐transfer (CT) band in the visible region with an extinction coefficient of ≈102 (M−1 cm−1). Strong, but not quantitative, quenching of the terthiophene fluorescence was confirmed for the [2]rotaxanes. Although the β‐substituted terthiophene thread was electrochemically polymerizable, the [2]rotaxane 3 T‐β‐Rx was not polymerizable. This result indicates that the interlocked CBPQT4+ macrocycle effectively suppresses the electrochemical polymerization of the terthiophene unit because electrostatic repulsive and steric effects of CBPQT4+ hinder the dimerization of the terthiophene radical cations. In the electrochemical measurement, we confirmed the shift of the first reduction peak towards less negative potential compared to free CBPQT4+ and the splitting of the second reduction peak. These electrochemical behaviors are similar to those observed for the highly‐constrained [2]rotaxanes. The β‐substituted terthiophene [2]rotaxanes reported herein are important key compounds to prepare polythiophene polyrotaxanes.
On the Track of Novel Triel‐Stabilised Silylaminoiminoborenes
Authors: Ott Holger , Matthes Christoph , Ringe Arne , Magull Jörg , Stalke Dietmar , Klingebiel Uwe 
Published: March 2009

AbstractBorenes and boranes: Silylaminoiminoborenes, such as depicted, were isolated after treatment of halogen triels with silylaminofluoroboranes. In addition, novel aryl‐ and silyl‐substituted diaminofluoroboranes were also prepared in order to substantiate this reaction route.magnified imageReactions between the halogen triels AlClMe2, AlBr3, GaCl3 and the silylaminofluoroboranes (Me3Si)2NB(F)NRSiMe3 (R=SiMe3, CMe3) afforded the silylaminoiminoborenes, which were isolated as the triel adducts, such as Me3Si(Cl3Ga)NBNRSiMe3 (6). In order to extent this reaction path to other fluoroboranes, novel aryl‐ and silyl‐substituted diaminofluoroboranes were synthesised. Because almost no open‐chain diaminofluoroboranes had been structurally characterised previously, corresponding fluoroboranes containing no silyl groups were crystallised for purposes of comparison. In complex reactions with the arylsilylaminofluoroboranes [(2,6‐(iPr)2C6H3)(Me3Si)NB(F)NR2, R=iPr, iBu], amine adducts of borenium salts such as [(iPr)2NH→B(Bu)NH‐2,6‐(iPr)2C6H3]+AlCl4− (13) were obtained.
ChemInform Abstract: Electrical Conductivity of the Oxygen‐Deficient Rutile CrNbO4‐δ.
Authors: Perez Flores Juan Carlos , Garcia‐Alvarado Flaviano 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Subsolidus Phase Relations, Crystal Chemistry and Cation‐Transport Properties of Sodium Iron Antimony Oxides.
Authors: Politaev V. V. , Nalbandyan V. B. 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chemical Preparation, Crystallographic Characterization, Thermal Behavior and IR Studies of Two New Cyclotriphosphates SrKP3O9·3H2O and SrKP3O9.
Authors: Belaaouad S. , Charaf A. , El Kababi K. , Radid M. 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Asymmetric Bifunctional Primary Aminocatalysis on Magnetic Nanoparticles.
Authors: Luo Sanzhong , Zheng Xiaoxi , Cheng Jin‐Pei 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Organocatalytic Activity of 4‐Hydroxy‐prolinamide Alcohol with Different Noncovalent Coordination Sites in Asymmetric Michael and Direct Aldol Reactions.
Authors: Okuyama Yuko , Nakano Hiroto , Watanabe Yuki , Makabe Mika , Takeshita Mitsuhiro , Uwai Koji , Kabuto Chizuko , Kwon Eunsang 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Some Indole Based Spiro and Condensed Heterocycles as Potential Biologically Active Agents.
Authors: Sharma R. L. , Kour Daljeet , Singh Jasbir , Kumar Surinder , Gupta Poonam , Gupta Shallu , Kour Bhavneet , Sachar Anand 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Microwave‐Assisted Synthesis of Fused Heterocycles Incorporating Trifluoromethyl Moiety.
Authors: Shaaban Mohamed R. 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of α‐Keto‐Imides via Oxidation of Ynamides.
Authors: Al‐Rashid Ziyad F. , Johnson Whitney L. , Hsung Richard P. , Wei Yonggang , Yao Pei‐Yuan , Liu Renhei , Zhao Kang 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Chemistry and Reactivity of α‐Substituted Ketones in Isonitrile‐Based Multicomponent Reactions.
Authors: Fan Lijun , Adams Ashley M. , Polisar Jason G. , Ganem Bruce 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: trans‐Directing Ability of Amide Groups in Cyclopropanation: Application to the Asymmetric Cyclopropanation of Alkenes with Diazo Reagents Bearing Two Carboxy Groups.
Authors: Marcoux David , Charette Andre B. 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Efficient Iron/Copper Cocatalyzed Alkynylation of Aryl Iodides with Terminal Alkynes.
Authors: Huang He , Jiang Hualiang , Chen Kaixian , Liu Hong 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Use of Formamidine Protection for the Derivatization of Aminobenzoic Acids.
Authors: Zhichkin Paul E. , Peterson Lisa H. , Beer Catherine M. , Rennells W. Martin 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Pyridine and Triphenylphosphine Oxide Activation of Sulfonyl Chlorides in the Syntheses of (E) Alk‐1‐enyl Sulfones.
Authors: Signore G. , Malanga C. , Menicagli R. 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Evaluation of Phytotoxicity of Disugran Analogues.
Authors: Basso Silvana M. , Montanez Juan P. , Santiago Ana N. 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: C80Cl12: A Chlorine Derivative of the Chiral D2—C80 Isomer—Empirical Rationale of Halogen‐Atom Addition Pattern.
Authors: Simeonov Kalin S. , Amsharov Konstantin Yu. , Jansen Martin 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Simple and Practical Synthesis of Methyl Benzo[b]furan‐3‐carboxylates.
Authors: Melkonyan Ferdinand S. , Golantsov Nikita E. , Karchava Alexander V. 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Copper‐Catalyzed Addition Reactions of Aromatics and Ketones to 2‐Aza‐2,4‐cyclopentadienone: Facile and Efficient Transformation of Carbonyl‐ene‐nitriles to 1H‐Pyrrolin‐2(5H)‐ones.
Authors: Murai Masahito , Miki Koji , Ohe Kouichi 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Improved Synthesis of 1‐[Hexahydrocyclopenta [c]pyrrol‐2(1H)‐yl]‐3‐(4‐methylbenzenesulfonyl)urea.
Authors: Qian Chao , Liu Yan , Chen Xinzhi 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Organocatalytic Asymmetric 1,3‐Dipolar Cycloaddition of Nitrones to Nitroolefins.
Authors: Du Wei , Liu Yan‐Kai , Yue Lei , Chen Ying‐Chun 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Novel Synthesis of Coumarins Employing Triphenyl(α‐carboxymethylene)phosphorane Imidazolide as a C‐2 Synthon.
Authors: Upadhyay Puspesh K. , Kumar Pradeep 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: An Easy Approach to α,β‐Unsaturated δ‐Thiolactams via a RCM and Thionation One‐Pot Procedure.
Authors: Sosnicki Jacek G. 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Metal‐Free One‐Pot Approach Towards the Synthesis of Hantzsch Esters and Their Application as the Hydrogen Source for the Reduction of Activated Olefins Catalyzed by Bromo Dimethyl Sulfonium Bromide (BDMS).
Authors: Goswami Papori , Ali Shahzad , Khan Md. M. , Das Babulal 
Published: March 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.