bluuebunny/crossref_metadata_2025_split huggingface dataset:
Self‐Assembly of Coiled Coils in Synthetic Biology: Inspiration and Progress
Authors: Robson Marsden Hana , Kros Alexander 
Published: April 2010

AbstractBiological self‐assembly is very complex and results in highly functional materials. In effect, it takes a bottom‐up approach using biomolecular building blocks of precisely defined shape, size, hydrophobicity, and spatial distribution of functionality. Inspired by, and drawing lessons from self‐assembly processes in nature, scientists are learning how to control the balance of many small forces to increase the complexity and functionality of self‐assembled nanomaterials. The coiled‐coil motif, a multipurpose building block commonly found in nature, has great potential in synthetic biology. In this review we examine the roles that the coiled‐coil peptide motif plays in self‐assembly in nature, and then summarize the advances that this has inspired in the creation of functional units, assemblies, and systems.
Gold Nanoparticle–Fluorophore Complexes: Sensitive and Discerning “Noses” for Biosystems Sensing
Authors: Bunz Uwe H. F. , Rotello Vincent M. 
Published: April 2010

AbstractGold nanoparticles (NPs) efficiently quench adsorbed fluorophores. Upon disruption of such complexes by an analyte, fluorescence turn‐on is observed. By judicious choice of the functionalized NP and the fluorophore, these complexes display different responses to analytes, thus leading to versatile yet simple array‐based sensor platforms. Using this strategy, we can identify proteins in buffer and serum, distinguish between both different species and different strains of bacteria, and differentiate between healthy, cancerous, and metastatic human and murine cells.
Chiral iridium(I) bis(NHC) complexes as catalysts for asymmetric transfer hydrogenation
Authors: Diez Claus , Nagel Ulrich 
Published: April 2010

AbstractThe common use of NHC complexes in transition‐metal mediated C–C coupling and metathesis reactions in recent decades has established N‐heterocyclic carbenes as a new class of ligand for catalysis. The field of asymmetric catalysis with complexes bearing NHC‐containing chiral ligands is dominated by mixed carbene/oxazoline or carbene/phosphane chelating ligands. In contrast, applications of complexes with chiral, chelating bis(NHC) ligands are rare. In the present work new chiral iridium(I) bis(NHC) complexes and their application in the asymmetric transfer hydrogenation of ketones are described. A series of chiral bis(azolium) salts have been prepared following a synthetic pathway, starting from L‐valinol and the modular buildup allows the structural variation of the ligand precursors. The iridium complexes were formed via a one‐pot transmetallation procedure. The prepared complexes were applied as catalysts in the asymmetric transfer hydrogenation of various prochiral ketones, affording the corresponding chiral alcohols in high yields and moderate to good enantioselectivities of up to 68%. The enantioselectivities of the catalysts were strongly affected by the various, terminal N‐substituents of the chelating bis(NHC) ligands. The results presented in this work indicate the potential of bis‐carbenes as stereodirecting ligands for asymmetric catalysis and are offering a base for further developments. Copyright © 2010 John Wiley & Sons, Ltd.
A novel method of modifying poly(ethylene terephthalate) fabric using supercritical carbon dioxide
Authors: Ma Wen‐Xiao , Zhao Chuan , Okubayashi Satoko , Tabata Isao , Hisada Kenji , Hori Teruo 
Published: April 2010

AbstractFor the modification of poly(ethylene terephthalate) (PET) fabric, a type of epoxy compound, glycerol polyglycidyl ether (GPE), was impregnated as a cross‐linking agent into PET fabric by means of supercritical carbon dioxide (scCO2), then, a series of immobilization processes were implemented, including the pad‐dry‐cure process and the solution process to finish the GPE‐PET fabric with natural functional agents (sericin, collagen, or chitosan). Chloroform was found to be an effective cosolvent, as evidenced by the mass transfer of GPE to PET during the treatment with scCO2. Chemical analyses by X‐ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy showed that GPE can penetrate the surface of the PET fabric in scCO2 pretreatment process, and natural functional agents (sericin, collagen, or chitosan) can also be immobilized on the surface of the GPE‐PET fabric especially for the method of pad‐dry‐cure. The nitrogen content in the modified PET fabrics was calculated accurately and confirmed by combustion analysis. The modified PET fabric displayed improvements in surface wettability, moisturization efficiency, and antibacterial characteristics against S. aureus, which demonstrated that the feasibility of this design for immobilizing natural functional agents (sericin, collagen, or chitosan) onto the surface of the PET fabric. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Removal of phenol from aqueous solutions by adsorption onto polymeric adsorbents
Authors: Hararah Muhanned A. , Ibrahim Khalid A. , Al‐Muhtaseb Ala'a H. , Yousef Rushdi I. , Abu‐Surrah Adnan , Qatatsheh Ala'a 
Published: April 2010

AbstractPhenolic compounds are one of the most representative pollutants in industrial wastewater, and efficient removals of them have attracted significant concerns. In this study, several commercial and new synthetic polymers (acrylonitrile, 1,3‐butadiene, and styrene copolymer (ABS), styrene, acrylonitrile copolymer (SAN), poly(vinyl chloride) (PVC), poly(methyl methacrylate) (PMMA), poly(tert‐butyl acrylate) (ptBA)) with special functionalities were evaluated for their ability to remove phenol from an aqueous solution. Equilibrium studies were conducted in the range of 20–100 mg/L initial phenol concentrations, 3–11 pH solutions, and a temperature range of 25–65°C. The results showed that (styrene, 1,3‐butadiene) copolymer (SAN) gave the best adsorption capacity among all of the polymers tested. The solution temperature, phenol concentration, and agitation rate played a significant role in influencing the capacity of the adsorbents toward phenol molecules. An increase in solution temperature led to a significant increase in the adsorption capacity of SAN. The percentage of adsorption decreased when initial concentration of phenol increased. However, the percentage removal of phenol was observed to increase with agitation. Removal of phenol using polymeric microbeads is difficult to investigate under high and low pH values because it requires a lot of acid or base to adjust the pH values in the adsorption media. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Thermo‐electric‐visco‐elastic material
Authors: Ezzat M. A. , Zakaria M. , El‐Bary A. A. 
Published: April 2010

AbstractIn this work, we introduce the Seebeck effect in Ohm's law and Thomson heating effect in generalized Fourier's law, to the equations of the linear theory of electro‐magneto‐thermoviscoelasticity, allowing the second sound effects. A normal mode analysis is used. The resulting formulation is applied to a problem of a rotating thick plate subject to heat on parts of the upper and lower surfaces of the plate that varies exponentially with time. The exact formulas of temperature, displacement, stresses, electric field, magnetic field, and current density are obtained. The considered variables are presented graphically and discussions are made. Seebeck and Peltier effects on thermoelectric viscoelastic material are studied. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
A novel method for controlling the sublayer microstructure of an ultrafiltration membrane: The preparation of the PSF–Fe3O4 ultrafiltration membrane in a parallel magnetic field
Authors: Huang Zheng‐Qing , Chen Long , Chen Kun , Zhang Zhi , Xu Hong‐Tao 
Published: April 2010

AbstractIt is very important to control the substructure of a membrane prepared by the phase inversion process. This article reports a novel method to control the substructure of ultrafiltration (UF) membrane by the combined effect of a magnetic filler and a parallel magnetic field. A series of polysulfone (PSF)–ferrosoferric oxide (Fe3O4) UF membranes with different amounts of Fe3O4 were prepared in a parallel magnetic field from suspensions, using the phase inversion process. The suspensions consisted of PSF, N,N‐dimethylacetamide, poly(vinylpyrrolidone), and Fe3O4. Magnetic Fe3O4 particles in a casting solution are expected to arrange along the direction of a magnetic field during the membrane formation. This kind of oriented arrangement can gradually change the cross‐sectional microstructure of a membrane from normal finger‐like macrovoids perpendicular to the membrane surface into macrovoids parallel to the membrane surface, with increasing Fe3O4 content. As a result, a novel membrane with “lamellar macrovoids” (parallel to the membrane surface) in the sublayer was prepared as the Fe3O4 content reached 70 wt %. Furthermore, the membrane with 70 wt % Fe3O4 not only had the best flux and rejection but also had a good antipressure ability. The formation mechanism of novel microstructure of the sublayer in the UF membrane is also discussed. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Constructing an abstract model for ladder diagram diagnosis using Petri nets
Authors: Tsai Jui‐I , Teng Ching‐Cheng 
Published: April 2010

AbstractThis paper proposes a method for constructing an abstract model for analyzing and diagnosing electrical circuit ladder diagrams (LDs) using Petri nets, and also supporting network‐based monitoring and supervision. This approach converts normal open (NO) and normal close (NC) contacts in the LD into Petri net transitions, and converts devices (e.g. relay coils) in the LD into Petri net places. This study introduces the concepts of composite transitions, composite places, and relevant state to reduce complexity and increase readability of Petri nets for constructing abstract models. The current study constructing diagnosis of fault modeling, introduces simple matrix manipulation and the difference output vector (DOV) to determine the faulty area for diagnosis in the ladder diagram. An LD controller example demonstrates the usable approach. Copyright © 2010 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Control of Relative Direction and Amplitude in Extension/Contraction Motions of Molecular Strands Induced by Ion Binding
Authors: Stadler Adrian‐Mihail , Ramírez Juan , Lehn Jean‐Marie 
Published: April 2010

AbstractThe shape of ligand strands composed of six‐membered aza‐heterocycles (het) connected at the α and α′ positions by hydrazone (hyz) units is determined in a predictable fashion by the nature of the heterocyclic groups (pyridine, pyrimidine, pyrazine etc.), and covers the range from extended linear to compact helical structures. The binding of metal ions to the coordination subunits, defined by the het‐hyz sequences, leads to marked shape changes by inter‐converting bent and linear conformations of the subunits, thus inducing relative motions of strand domains either in the same (con‐sense, “twirling”) or in opposite (dis‐sense, “flapping”) directions. The amplitude of the motion induced by metal‐ion binding and release and the relative directions of the formal motions can be controlled by the nature of the heterocyclic units. Thus, motions around a central 4,6‐disubstituted pyrimidine are dis‐sense motions, whereas there are con‐sense motions around a central 2,5‐disubstituted pyrazine unit, as illustrated by model ligands 1 and 2, respectively. The more extended helical 3 and undulating (zigzag shape) 4 ligands undergo larger‐amplitude motions combining the relative displacements displayed by 1 and 2. Ligands 3 and 4 form linear tetranuclear PbII and ZnII complexes, thus producing an extension motion. The same holds for [Ru(4)(terpy)4](PF6)8 (terpy=terpyridine). Reversible acid–base‐triggered molecular motions have been generated with [Zn4(4)(OTf)8] (TfOH=triflic acid).
Room‐Temperature, Ligand‐ and Base‐Free Heck Reactions of Aryl Diazonium Salts at Low Palladium Loading: Sustainable Preparation of Substituted Stilbene Derivatives
Authors: Felpin François‐Xavier , Miqueu Karinne , Sotiropoulos Jean‐Marc , Fouquet Eric , Ibarguren Oier , Laudien Julia 
Published: April 2010

AbstractThe Pd(OAc)2‐catalyzed Heck reaction of aryl diazonium salts with 2‐arylacrylates led to cis‐stilbenes with good to excellent stereoselectivity. The environmentally friendly protocol developed in this work features low palladium loading in technical‐grade methanol at room temperature under base‐, additive‐, and ligand‐free conditions. The same protocol applied to simple Heck coupling of aryl diazonium salts with methyl acrylate allows astonishingly low palladium loading, down to 0.005 mol %. The stereoselectivity experimentally observed for the synthesis of cis‐stilbenes has been rationalized by DFT calculations. Moreover, the role of methanol in promoting the reaction has been clarified by a computational study.
Reductive Dimerization of Triruthenium Clusters Containing Cationic Aromatic N‐Heterocyclic Ligands
Authors: Cabeza Javier A. , del Río Ignacio , Pérez‐Carreño Enrique , Pruneda Vanessa 
Published: April 2010

AbstractThe cationic cluster complexes [Ru3(μ‐H)(μ‐κ2N,C‐L1 Me)(CO)10]+ (1+; HL1 Me=N‐methylpyrazinium), [Ru3(μ‐H)(μ‐κ2N,C‐L2 Me)(CO)10]+ (2+; HL2 Me=N‐methylquinoxalinium), and [Ru3(μ‐H)(μ‐κ2‐N,C‐L3 Me)(CO)10]+ (3+; HL3 Me=N‐methyl‐1,5‐naphthyridinium), which contain cationic N‐heterocyclic ligands, undergo one‐electron reduction processes to become short lived, ligand‐centered, trinuclear, radical species (1–3) that end in the formation of an intermolecular CC bond between the ligands of two such radicals, thus leading to neutral hexanuclear derivatives. These dimerization processes are selective, in the sense that they only occur through the exo face of the bridging ligands of trinuclear enantiomers of the same configuration, as they only afford hexanuclear dimers with rac structures (C2 symmetry). The following are the dimeric products that have been isolated by using cobaltocene as reducing agent: [Ru6(μ‐H)2{μ6‐κ4N2,C2‐(L1 Me)2}(CO)18] (5; from 1+), [Ru6(μ‐H)2{μ6‐κ4N2,C2‐(L2 Me)2}(CO)18] (6; from 2+), and [Ru6(μ‐H)2{μ4‐κ8N2,C6‐(L3 Me)2}(CO)18] (7; from 3+). The structures of the final hexanuclear products depend on the N‐heterocyclic ligand attached to the starting materials. Thus, although both trinuclear subunits of 5 and 6 are face‐capped by their bridging ligands, the coordination mode of the ligand of 5 is different from that of the ligand of 6. The trinuclear subunits of 7 are edge‐bridged by its bridging ligand. In the presence of moisture, the reduction of 3+ with cobaltocene also affords a trinuclear derivative, [Ru3(μ‐H)(μ‐κ2N,C‐L3′ Me)(CO)10] (8), whose bridging ligand (L3′ Me) results from the formal substitution of an oxygen atom for the hydrogen atom (as a proton) that in 3+ is attached to the C6 carbon atom of its heterocyclic ligand. The results have been rationalized with the help of electrochemical measurements and DFT calculations, which have also shed light on the nature of the odd‐electron species, 1–3, and on the regioselectivity of their dimerization processes. It seems that the sort of coupling reactions described herein requires cationic complexes with ligand‐based LUMOs.
Boronic Acid Catalysis for Mild and Selective [3+2] Dipolar Cycloadditions to Unsaturated Carboxylic Acids
Authors: Zheng Hongchao , McDonald Robert , Hall Dennis G. 
Published: April 2010

AbstractHerein, the concept of boronic acid catalysis (BAC) for the activation of unsaturated carboxylic acids is applied in several classic dipolar [3+2] cycloadditions involving azides, nitrile oxides, and nitrones as partners. These cycloadditions can be used to produce pharmaceutically interesting, small heterocyclic products, such as triazoles, isoxazoles, and isoxazolidines. These cycloadducts are formed directly and include a free carboxylic acid functionality that can be employed for further transformations, thereby avoiding prior masking or functionalization. In all cases, BAC provides faster reactions, under milder conditions, with much improved product yields and regioselectivities. In some instances, such as triazole formation from the reaction of azides with 2‐alkynoic acids, catalysis with ortho‐nitrophenylboronic acid circumvents the undesirable product decarboxylation observed when using thermal activation. By using NMR spectroscopic studies, the boronic acid catalyst was shown to provide activation by a LUMO‐lowering effect in the unsaturated carboxylic acid, likely via a monoacylated hemiboronic ester intermediate.
ChemInform Abstract: Polymorphism of LiAg.
Authors: Pavlyuk V. V. , Dmytriv G. S. , Tarasiuk I. I. , Chumak I. V. , Pauly H. , Ehrenberg H. 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Synthetic Tuning of the Catalytic Properties of Au—Fe3O4 Nanoparticles.
Authors: Lee Youngmin , Garcia Miguel Angel , Frey Huls Natalie A. , Sun Shouheng 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Higher Ammoniates of BF3 and SiF4: Syntheses, Crystal Structures, and Theoretical Calculations.
Authors: Kraus Florian , Baer Sebastian A. 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Syntheses, Crystal Structures, Vibrational Spectra and 31P MAS NMR Spectra of the Thiophosphates NaM(PO3S)·9H2O (M: Ca, Ba).
Authors: Kazmierczak Karolina , Heck Joachim G. , Hoeppe Henning A. 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: UTa2O(S2)3Cl6: A Ribbon Structure Containing a Heterobimetallic 5d—5f M3 Cluster.
Authors: Wells Daniel M. , Chan George H. , Ellis Donald E. , Ibers James A. 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Structural Characterization of Two Cobalt Phosphites: 1‐D (H3NC6H4NH3)Co (HPO3)2 and 2‐D (NH4)2Co2(HPO3)3.
Authors: Cheng Chi‐Chang , Chang Wei‐Kuo , Chiang Ray‐Kuang , Wang Sue‐Lein 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: CsCu2Sc3Te6 and CsCuY2Te4: Two New Quaternary Cesium Copper Rare‐Earth Metal Tellurides.
Authors: Babo Jean‐Marie , Schleid Thomas 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Crystal Structures or Ternary Ruthenium Ferrites SrM2.+‐.xRu4.+‐. xO11 with M: Fe, Co and Magnetic and Transport Properties of Al‐Doped Single Crystals.
Authors: Niewa Rainer , Shlyk Larysa , Schuepp‐Niewa Barbara , De Long Lance E. 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Broensted Acid Catalyzed Formal [3 + 3] Annulation. Straightforward Synthesis of Dihydro‐2H‐chromenones, Pyranones, and Tetrahydroquinolinones.
Authors: Moreau Julie , Hubert Claudie , Batany Jessika , Toupet Loic , Roisnel Thierry , Hurvois Jean‐Pierre , Renaud Jean‐Luc 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Concise One‐Pot Tandem Synthesis of Indoles and Isoquinolines from Amides.
Authors: Okamoto Noriko , Miwa Yoshihisa , Minami Hideki , Takeda Kei , Yanada Reiko 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Silver‐Catalyzed Intermolecular Hydroamination of Alkenes and 1,3‐Dienes.
Authors: Giner Xavier , Najera Carmen 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Palladium‐Catalyzed Cross‐Coupling Reaction of Secondary Benzylic Bromides with Grignard Reagents.
Authors: Lopez‐Perez Ana , Adrio Javier , Carretero Juan C. 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Electrochemical Iodofluorination of Electron‐Deficient Olefins.
Authors: Nagura Hirokatsu , Kuribayashi Shunsuke , Ishiguro Yutaka , Inagi Shinsuke , Fuchigami Toshio 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Towards a Chemo‐Enzymatic Method for the Asymmetric Synthesis of β‐Amino Tertiary Alcohols.
Authors: March‐Cortijos Andrea , Snape Timothy J. 
Published: April 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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.