bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Application of Amine‐Terminated Silicon Quantum Dots on the Imaging of Human Serum Proteins after Polyacrylamide Gel Electrophoresis (PAGE)
Authors: Liu Pingping , Na Na , Huang Lingyun , He Dacheng , Huang Changgang , Ouyang Jin 
Published: January 2012

AbstractNovel amine‐terminated silicon (Si) quantum dots (QDs) were synthesized and applied for the detection of human serum proteins on gels directly after polyacrylamide gel electrophoresis (PAGE). The diameter of these stable amine‐terminated Si QDs was in the range of 0.5–2.0 nm. In this study, the fluorescent imaging conditions, such as the buffer solution, pH value, buffer concentration and quantity of Si QDs, were optimized and the possible mechanisms of Si QDs–protein interaction were analyzed. The mode of Si QDs and human serum albumin association was found to occur by hydrogen bond interactions; this was probably attributed to the interaction between the amino group of amine‐terminated Si QDs and the carboxyl group of proteins. Meanwhile, human serum proteins separated by native 1D and native 2D electrophoresis were detected by Si QD‐based fluorescent imaging. Some proteins, such as isoform 1 of α‐1‐antitrypsin, complement C3 (Fragment) and hemopexin, which were identified by mass spectrometry (MS), were easily detected by using Si QDs, but not with CBB‐R250 staining. The Si QDs‐based fluorescent imaging technique with high resolution is a sensitive and dependable method for direct detection of human serum proteins, and has enormous potential in clinical diagnosis.
ChemInform Abstract: Tetrahedral/Octahedral Frameworks with Different Local Interruptions: Syntheses and Structures of Two New Inorganic Niobium Phosphates.
Authors: Liu Guang‐Zhen , Wang Jian‐Ge , Wang Li‐Ya 
Published: January 2012

AbstractKNbP2O8 (I) is synthesized by dispersing a solution of Nb2O5 in HF (110 °C, 24 h) into a mixture of H2O, ethylene glycol, KOH, and 85% H3PO4 (autoclave, 180 °C, 7 d, 37% yield).
ChemInform Abstract: Low‐Temperature Ammonothermal Synthesis of LaTaON2.
Authors: Watanabe Tomoaki , Tajima Keisuke , Li Jin Wang , Matsushita Nobuhiro , Yoshimura Masahiro 
Published: January 2012

AbstractPhase‐pure powders of the title compound are synthesized from a LaTa precursor alloy in supercritical ammonia using sodium amide as a flux (873 K, 100 MPa NH3, 15—75 h).
ChemInform Abstract: Stereoselective Rhodium‐Catalyzed Amination of Alkenes.
Authors: Lebel Helene , Spitz Cedric , Leogane Olivier , Trudel Carl , Parmentier Michael 
Published: January 2012

AbstractCompared to (Z)‐methylstyrene (VI), other substituted (Z)‐alkenes such as indene, dihydronaphthalene and ethylstyrene provide the desired aziridines as 1:1 mixtures of diastereomers.
ChemInform Abstract: Efficient and Scalable One‐Pot Synthesis of 2,4‐Dienols from Cycloalkenones: Optimized Total Synthesis of Valerenic Acid.
Authors: Ramharter Juergen , Mulzr Johann 
Published: January 2012

AbstractThe reaction of a variety of cyclic enones with Grignard or organolithium reagents proceeds via formation of intermediate allylic alcohols which further rearrange under acidic conditions (TFA or AcOH) to afford the desired dienols.
ChemInform Abstract: Microwave‐Assisted Solventless Reaction of Iridium‐Catalyzed Alkylation of Amines with Alcohols in the Absence of Base.
Authors: Zhang Weixing , Dong Xiaochun , Zhao Weili 
Published: January 2012

AbstractA wide range of secondary and tertiary amines is prepared via a stoichiometric reaction of primary amines with alcohols or diols, respectively.
ChemInform Abstract: Diversity‐Oriented Synthesis of Biaryl Derivatives Using Cross‐Enyne Metathesis, Diels—Alder Reaction, and Suzuki—Miyaura Cross‐Coupling as Key Steps.
Authors: Kotha Sambasivaro , Seema Vittal 
Published: January 2012

AbstractStarting from alkynes (I) or (VIII), a three‐step sequence following conditions A), B) and C) leads to formation of unsymmetrical biaryl scaffolds.
ChemInform Abstract: DABO Boronates: Stable Heterocyclic Boronic Acid Complexes for Use in Suzuki—Miyaura Cross‐Coupling Reactions.
Authors: Reilly Maureen K. , Rychnovsky Scott D. 
Published: January 2012

AbstractA variety of boronates is found to be suitable air‐stable agents for the reaction with aryl halides.
ChemInform Abstract: A Practical, One‐Pot Synthesis of Highly Substituted Thiophenes and Benzo[b]thiophenes from Bromoenynes and o‐Alkynylbromobenzenes.
Authors: Guilarte Veronica , Fernandez‐Rodriguez Manuel A. , Garcia‐Garcia Patricia , Hernando Elsa , Sanz Roberto 
Published: January 2012

AbstractTwo one‐pot procedures are developed to prepare a wide range of thiophene structures.
ChemInform Abstract: Diastereo‐ and Enantioselective Conjugate Addition of 3‐Substituted Oxindoles to Nitroolefins Catalyzed by a Chiral Ni(OAc)2‐Diamine Complex under Mild Conditions.
Authors: Han Yan‐Yan , Wu Zhi‐Jun , Chen Wen‐Bing , Du Xi‐Lin , Zhang Xiao‐Mei , Yuan Wei‐Cheng 
Published: January 2012

AbstractA wide range of aromatic nitroolefins and various substituted oxindoles are effectively converted to the optically enriched 3,3‐disubstituted products bearing 2 vicinal quaternary/tertiary stereocenters.
ChemInform Abstract: N‐Capping of Primary Amines with 2‐Acylbenzaldehydes to Give Isoindolinones.
Authors: Augner Daniel , Gerbino Dario C. , Slavov Nikolay , Neudoerfl Joerg‐Martin , Schmalz Hans‐Guenther 
Published: January 2012

AbstractThe reaction is successful with ammonia and primary amines and extended to the reaction of natural substrate pestalone (VIII).
ChemInform Abstract: Direct C2‐Alkylation of Azoles with Alcohols and Ethers Through Dehydrogenative Cross‐Coupling under Metal‐Free Conditions.
Authors: He Tao , Yu Lin , Zhang Lei , Wang Lei , Wang Min 
Published: January 2012

AbstractA variety of secondary and tertiary alcohols, linear and cyclic ethers react with benzothiazole, benzoxazole and benzimidazole.
ChemInform Abstract: Asymmetric Synthesis of 3,4‐Diaminochroman‐2‐ones Promoted by Guanidine and Bisguanidium Salt.
Authors: Dong Shunxi , Liu Xiaohua , Zhang Yulong , Lin Lili , Feng Xiaoming 
Published: January 2012

AbstractThe reaction of ortho‐hydroxy aldimines with azlactones proceeds with excellent trans‐selectivity when AGU is used as catalyst.
ChemInform Abstract: Catalytic Intermolecular Hetero‐Dehydro‐Diels—Alder Cycloadditions: Regio‐ and Diastereoselective Synthesis of 5,6‐Dihydropyridin‐2‐ones.
Authors: Fernandez‐Garcia Jesus Manuel , Fernandez‐Rodriguez Manuel A. , Aguilar Enrique 
Published: January 2012

AbstractThe reaction is best catalyzed by AuCl(PEt3)/AgSbF6.
ChemInform Abstract: Synthesis of 3‐Heteroarylthioquinoline Derivatives and Their in vitro Antituberculosis and Cytotoxicity Studies.
Authors: Chitra Selvam , Paul Nidhin , Muthusubramanian Shanmugam , Manisankar Paramasivam , Yogeeswari Perumal , Sriram Dharmarajan 
Published: January 2012

AbstractTitle compounds (III) are obtained via ytterbium chloride‐catalyzed Friedlaender synthesis.
ChemInform Abstract: Synthesis and Biological Evaluation of 1,9‐Disubstituted β‐Carbolines as Potent DNA Intercalating and Cytotoxic Agents.
Authors: Chen Zhiyong , Cao Rihui , Shi Buxi , Guo Liang , Sun Jie , Ma Qin , Fan Wenxi , Song Huacan 
Published: January 2012

AbstractA series of novel 1,9‐disubstituted β‐carbolines (IV) are designed, synthesized, and evaluated as cytotoxic and DNA intercalating agents.
ChemInform Abstract: Thermal [2 + 2] Cycloaddition of CF3‐Substituted Allenynes: Access to Novel Cyclobutene‐Containing α‐Amino Acids.
Authors: Mailyan Artur K. , Krylov Ivan M. , Bruneau Christian , Dixneuf Pierre H. , Osipov Sergey N. 
Published: January 2012

AbstractReadily prepared α‐CF3‐α‐amino allenynes (III) undergo regioselective intramolecular [2 + 2] cycloaddition with the distal double bond to produce bicyclic amino acid scaffolds of high potential.
ChemInform Abstract: Synthesis and Biological Evaluation of Dihydroindeno and Indeno[1,2‐e][1,2,4]triazolo[3,4‐b][1,3,4]thiadiazones as Antimicrobial Agents.
Authors: Prakash Om , Aneja Deepak K. , Hussain Khalid , Lohan Poonam , Ranjan Pooja , Arora Sanjiv , Sharma Chetan , Aneja Kamal R. 
Published: January 2012

AbstractFused heterocycles (III) and (V) are obtained from the reaction of α‐bromoindanone and α,α‐dibromoindanone, respectively, with triazoles (II).
ChemInform Abstract: Palladium‐Catalyzed Approach to Stereodefined Ten‐Membered Cycles from 1,5‐Bisallenes.
Authors: Cheng Jiajia , Jiang Xuefeng , Ma Shengming 
Published: January 2012

AbstractTen‐membered cycles with one‐ to two nitrogen atoms, not readily available, are prepared from bisallenes, aryliodides and amines.
ChemInform Abstract: Palladium‐Catalyzed Borylation of Aryl Arenesulfonates with Dialkoxyboranes.
Authors: Murata Miki , Oda Takeshi , Sogabe Yosuke , Tone Hirofumi , Namikoshi Takeshi , Watanabe Shinji 
Published: January 2012

AbstractBorylation of arenesulfonates (I) with dialkoxyborane (II) proceeds in the presence of a combination of Pd(dba)2 and a phosphanoferrocene derivative as a versatile catalyst system to afford arylboronates (III) in good yields.
ChemInform Abstract: Synthesis and Properties of Seleno‐Analogue MK‐Organic Dye for Photovoltaic Cells Prepared by C—H Functionalization Reactions of Selenophene Derivatives.
Authors: Tamba Shunsuke , Fujii Ryosuke , Mori Atsunori , Hara Kohjiro , Koumura Nagatoshi 
Published: January 2012

AbstractHomocoupling and C—H arylation reactions of selenophene take place similarly to those of thiophene.
ChemInform Abstract: Expedient Entry to the Piperazinohydroisoquinoline Ring System Using a Sequential Ugi/Pictet—Spengler/Reductive Methylation Reaction Protocol.
Authors: Cano‐Herrera Ma.‐Angeles , Miranda Luis D. 
Published: January 2012

AbstractAn expedient entry to the piperazinohydroisoquinoline ring system present in the tetrahydroisoquinoline antitumor alkaloids family is described.
ChemInform Abstract: One‐Pot Synthesis of In0 Nanoparticles with Tuned Particle Size and High Oxidation Stability.
Authors: Kind Christian , Feldmann Claus 
Published: January 2012

AbstractThe title nanoparticles are prepared from diethylene glycol solutions of InCl3·4H2O and disodium citrate hydrate by rapidly injecting aqueous NaBH4 solutions at 100 °C.
ChemInform Abstract: Recent Advances in Enantioselective Organocatalyzed Anhydride Desymmetrization and Its Application to the Synthesis of Valuable Enantiopure Compounds
Authors: Diaz de Villegas Maria D. , Galvez Jose A. , Etayo Pablo , Badorrey Ramon , Lope‐Ram‐de‐Viu Pilar 
Published: January 2012

AbstractReview: 134 refs.
Retracted: A Facile Synthetic Route to New Fluorinated Building‐Blocks of 1‐Fluoroalkynes and 1‐Fluorodiynes
Authors: Liu Cuibo , Ma Hai , Nie Jing , Ma Junan 
Published: January 2012

AbstractA facile and direct fluorination process of alkynes and diynes was developed. In the presence of n‐butyllithium, the reaction of a series of terminal alkynes and diynes with the electrophilic fluorinating reagent (NFSI) proceeded to afford various 1‐fluoroalkynes and 1‐fluoro‐1,3‐diynes in moderate to high yields.
Photocatalytic Degradation of Imidacloprid by Phosphotungstic Acid Supported on a Mesoporous Sieve MCM‐41
Authors: Feng Changgen , Li Yanzhou , Liu Xia 
Published: January 2012

AbstractSolid catalysts consisting of polyoxometalates (POM) namely phosphotungstic acid H3PW12O40 (HPW) supported on a mesoporous sieve MCM‐41 have been prepared and characterized by FT‐IR, X‐ray diffraction, nitrogen adsorption and high resolution transmission electron microscope (HRTEM). The HPW/MCM‐41 with different HPW loadings from 10 to 60 wt% possess large specific surface area and rather uniform mesopores. Keggin structure of HPW retains on the prepared composite catalysts. The photocatalytic performance of HPW/MCM‐41 was examined by degradation of a durable pesticide imidacloprid. It is found that the prepared photocatalysts exhibit high activity under irradiation of 365 nm monochromatic light. For 50 mL of imidacloprid (10 mg/L), conversion of imidacloprid using 20 mg of HPW/MCM‐41 with 50 wt% loading level and calcined at 300°C reaches 58.0% after 5 h irradiation.
Climate change and the decline of a once common bird
Authors: McClure Christopher J. W. , Rolek Brian W. , McDonald Kenneth , Hill Geoffrey E. 
Published: January 2012

AbstractClimate change is predicted to negatively impact wildlife through a variety of mechanisms including retraction of range. We used data from the North American Breeding Bird Survey and regional and global climate indices to examine the effects of climate change on the breeding distribution of the Rusty Blackbird (Euphagus carolinus), a formerly common species that is rapidly declining. We found that the range of the Rusty Blackbird retracted northward by 143 km since the 1960s and that the probability of local extinction was highest at the southern range margin. Furthermore, we found that the mean breeding latitude of the Rusty Blackbird was significant and positively correlated with the Pacific Decadal Oscillation with a lag of six years. Because the annual distribution of the Rusty Blackbird is affected by annual weather patterns produced by the Pacific Decadal Oscillation, our results support the hypothesis that directional climate change over the past 40 years is contributing to the decline of the Rusty Blackbird. Our study is the first to implicate climate change, acting through range retraction, in a major decline of a formerly common bird species.
Multidimensional Latent Classification of ‘Street Robbery’ Offences
Authors: Goodwill Alasdair M. , Stephens Skye , Oziel Sandra , Yapp Jamie , Bowes Nicola 
Published: January 2012

AbstractIn a recent study of personal robbery, commissioned by the Home Office in the UK, a qualitative typology of robbery offences was proposed based on the approach used by the offender to commit the crime, consisting of four approach types: Blitz, Confrontation, Con, and Snatch. Conceptual inspection of the typology reveals that these proposed types may be hypothetically demarcated as the product of two latent dimensions: interaction (between the offender and the victim) and violence (used to threaten/harm the victim). The current paper utilises crime scene information from 72 incarcerated male offenders convicted of ‘street’ robbery to test this hypothesis. Convergent statistical analysis was utilised to test the structure of Smith's typology first using multidimensional scaling (MDS) and then principal component analysis (PCA). MDS and PCA analyses provided convergent support for the existence of the four robbery styles and the latent dimensions of interaction and violence. Implications of Smith's typological structure and latent behavioural dimensions on the conceptualisation and classification of robbery offences are discussed within the existing literature on ‘street’ robbery. Copyright © 2012 John Wiley & Sons, Ltd.
7 tesla imaging of cerebral radiation necrosis after arteriovenous malformations treatment using amide proton transfer (APT) imaging
Authors: Gerigk Lars , Schmitt Benjamin , Stieltjes Bram , Röder Falk , Essig Marco , Bock Michael , Schlemmer Heinz‐Peter , Röthke Matthias 
Published: January 2012

AbstractArteriovenous malformations (AVM) can be treated with stereotactic radiosurgery. An infrequent, but important complication of this treatment is radionecrosis, which can be detected by MRI. However, the imaging characteristics of necrosis are unspecific in conventional MRI. Here, we report a case of necrosis after radiotherapy of an AVM to illustrate the potential of 7 Tesla MRI including amide proton transfer (APT) for necrosis imaging. J. Magn. Reson. Imaging 2012;35:1207‐1209. © 2012 Wiley Periodicals, Inc.
The Influence of Silkworm Species on Cellular Interactions with Novel PVA/Silk Sericin Hydrogels
Authors: Lim Khoon S. , Kundu Joydip , Reeves April , Poole‐Warren Laura A. , Kundu Subhas C. , Martens Penny J. 
Published: January 2012

AbstractSericin peptides and PVA are chemically modified with methacrylate groups to produce a covalent PVA/sericin hydrogel. Preservation of the sericin bioactivity following methacrylation is confirmed, and PVA/sericin hydrogels are fabricated for both B. mori and A. mylitta sericin. Cell adhesion studies confirm the preservation of sericin bioactivity post incorporation in PVA gels. PVA/A. mylitta gels are observed to facilitate cell adhesion to a significantly greater degree than PVA/B. mori gels. Overall, the incorporation of sericin does not alter the physical properties of the PVA hydrogels but does result in significantly improved cellular interaction, particularly from A. mylitta gels.magnified image
Preparation and Characterization of Anisotropic Submicron Particles From Semicrystalline Polymers
Authors: Staff Roland H. , Lieberwirth Ingo , Landfester Katharina , Crespy Daniel 
Published: January 2012

AbstractThe synthesis of colloidally stable submicron particles of syndiotactic polystyrene (sPS) and isotactic polystyrene (iPS) is reported. Model particles based on poly‐L‐lactic acid (PLLA), atactic polystyrene (aPS), sPS, and iPS are prepared by the evaporation of a solvent present in miniemulsion droplets. The degree of crystallinity of the particles is found to decrease with their size, as shown by DSC and WAXS measurements. Remarkably, nonspherical particles can be formed in the dispersed state with sPS and iPS, whereas PLLA and aPS particles always display spherical morphologies.
Spatially resolved extended phase graphs: Modeling and design of multipulse sequences with parallel transmission
Authors: Malik Shaihan J. , Padormo Francesco , Price Anthony N. , Hajnal Joseph V. 
Published: January 2012

AbstractA spatially resolved extended phase graph (SR‐EPG) framework is proposed for prediction of echo amplitudes in the presence of spatially variable radio frequency (RF) fields. The method may be used to examine any regularly repeating pulse sequence and provides a design framework for parallel transmission (PTx) systems; in this work signal homogeneity in static pseudo‐steady state (SPSS) turbo spin echo (TSE) imaging was investigated. Building on SR‐EPG calculations with PTx, a dynamic RF‐shimming approach is proposed in which, RF pulse amplitudes and phases are optimized on a per channel and per pulse basis to yield the desired signal response for all echoes. Results show significant improvements over “static” RF shimming (in which the relative amplitude/phase of the PTx channels are fixed for all pulses). SPSS‐TSE imaging using dynamic RF shimming resulted in excellent image quality, both in phantoms and in vivo, and confirmed SR‐EPG predictions. Magn Reson Med, 2012. © 2012 Wiley Periodicals, Inc.
How advancement in biological network analysis methods empowers proteomics
Authors: Goh Wilson W. B. , Lee Yie H. , Chung Maxey , Wong Limsoon 
Published: January 2012

AbstractProteomics provides important information ‐ that may not be inferable from indirect sources such as RNA or DNA ‐ on key players in biological systems or disease states. However, it suffers from coverage and consistency problems. The advent of network‐based analysis methods can help in overcoming these problems but requires careful application and interpretation. This review considers briefly current trends in proteomics technologies and understanding the causes of critical issues that need to be addressed ‐ i.e., incomplete data coverage and inter‐sample inconsistency. On the coverage issue, we argue that holistic analysis based on biological networks provides a suitable background on which more robust models and interpretations can be built upon; and we introduce some recently developed approaches. On consistency, group‐based approaches based on identified clusters, as well as on properly integrated pathway databases, are particularly useful. Despite that protein interactions and pathway networks are still largely incomplete, given proper quality checks, applications and reasonably sized data sets, they yield valuable insights that greatly complement data generated from quantitative proteomics.
Cloning and characterization of two new thermostable and alkalitolerant α-amylases from the Anoxybacillus species that produce high levels of maltose
Authors: Chai Yen Yen , Rahman Raja Noor Zaliha Raja Abd , Illias Rosli Md , Goh Kian Mau 
Published: January 2012

Abstract
Two genes that encode α-amylases from two Anoxybacillus species were cloned and expressed in Escherichia coli. The genes are 1,518 bp long and encode 506 amino acids. Both sequences are 98% similar but are distinct from other well-known α-amylases. Both of the recombinant enzymes, ASKA and ADTA, were purified using an α-CD–Sepharose column. They exhibited an optimum activity at 60°C and pH 8. Both amylases were stable at pH 6–10. At 60°C in the absence of Ca2+, negligible reduction in activity for up to 48 h was observed. The activity half-life at 65°C was 48 and 3 h for ASKA and ADTA, respectively. In the presence of Ca2+ ions, both amylases were highly stable for at least 48 h and had less than a 10% decrease in activity at 70°C. Both enzymes exhibited similar end-product profiles, and the predominant yield was maltose (69%) from starch hydrolysis. To the best of our knowledge, most α-amylases that produce high levels of maltose are active at an acidic to neutral pH. This is the first report of two thermostable, alkalitolerant recombinant α-amylases from Anoxybacillus that produce high levels of maltose and have an atypical protein sequence compared with known α-amylases.
Determinants and Consequences of Child Culture Brokering in Families from the Former Soviet Union
Authors: Jones Curtis J. , Trickett Edison J. , Birman Dina 
Published: January 2012

AbstractChild culture brokering occurs when immigrant children help their families navigate the new culture and language. The present study develops a model of the child culture broker role that situates it within the family and community economic and acculturative contexts of 328 families from the former Soviet Union. Path analysis was utilized to explore the relationships of community and family economic and cultural contexts with child culture brokering, child emotional distress, and family disagreements. All children reported some culture brokering for their parents. Less English proficient parents with lower status jobs, and living in areas with more Russian speaking families tended to utilize their children as brokers more often. Further, community economic conditions also predicted brokering indirectly, mediated by parent job social status. Brokering was related to child emotional distress and family disagreements. Further, culture brokering was a mediator of the impact of parent job social status on both child emotional distress and family disagreements. These results add to our understanding of the culture broker role and emphasize the utility of approaching research on it from an ecological perspective.