bluuebunny/crossref_metadata_2025_split huggingface dataset:
Release behavior of freeze‐dried alginate beads containing poly(N‐isopropylacrylamide) copolymers
Authors: Choi Jae‐Hyung , Lee Hyeon Yong , Kim Jin‐Chul 
Published: June 2008

AbstractBeads composed of alginate, poly(N‐isopropylacrylamide) (PNIPAM), the copolymers of N‐isopropylacrylamide and methacrylic acid (P(NIPAM‐co‐MAA)), and the copolymers of N‐isopropylacrylamide, methacrylic acid, and octadecyl acrylate (P(NIPAM‐co‐MAA‐co‐ODA)), were prepared by dropping the polymer solutions into CaCl2 solution. The beads were freeze‐dried and the release of blue dextran entrapped in the beads was observed in distilled water with time and pH. The degree of release was in the order of alginate bead < alginate/PNIPAM bead ≈ alginate/P(NIPAM‐co‐MAA) bead < alginate/P(NIPAM‐co‐MAA‐co‐ODA) bead. On the other hand, swelling ratios reached steady state within 20 min, and the values were 200–800 depending on the bead composition. The degree of swelling showed the same order as that of release. Among the beads, only alginate/P(NIPAM‐co‐MAA‐co‐ODA) bead exhibited pH‐dependent release. At acidic condition, inter‐ and intraelectrostatic repulsion is weak and P(NIPAM‐co‐MAA‐co‐ODA) could readily be assembled into an aggregate due to the prevailing hydrophobic interaction of ODA. Thus, it could block the pore of bead matrix, leading to a suppressed release. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Oxidative polymerization of pyrrole photocatalyzed by TiO2 nanoparticles and interactions in the composites
Authors: Weng Zhen , Ni Xiuyuan 
Published: June 2008

AbstractOxidative polymerization of pyrrole is initiated by photoexcited TiO2 nanoparticles. Pyrrole oligomers and polypyrrole (PPy) are continuously produced with reaction time. The conversion of pyrrole monomer changes as a function of the concentration of TiO2 nanoparticles. It is found that PPy in the composite has the conjugated structure and is partially oxidized with a formation of positively charged N+. Results from X‐ray photoelectron spectroscopy and Raman analysis consistently indicate that a strong interaction is established between the TiO2 and PPy. According to the results of UV–vis spectroscopy, a mechanism of photocatalytic oxidation is proposed for this polymerization. The interaction between TiO2 and PPy is found to arise from the photocatalytic reaction and discussed in terms of photoinduced Ti3+. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Diffusion‐Influenced Excited‐State Reversible Geminate ABCD Reaction in the Presence of an External Field
Authors: Park Soohyung , Shin Kook Joe 
Published: June 2008

AbstractWe obtained the exact Green functions, in the Laplace domain, for a diffusion‐influenced excited‐state reversible geminate ABCD reaction with two different lifetimes and quenching processes under a constant external field in one dimension. Analytic expressions for the survival probabilities of the initial and final states are obtained in the time domain at short and long times, respectively. The short‐time approximations obtained in this work are valid for ${t \char60 \left| K \right|^{ - 1} }$, where K depends on several parameters of the system. The analysis of the long‐time asymptotic behaviors reveals rather complex kinetic transitions dependent upon the field and lifetimes. We also find a destructive interplay leading to the reduction in the number of kinetic transitions similar to that found for the excited‐state geminate ABC reaction with an external field in one dimension.
Aryl Triolborates: Novel Reagent for Copper‐Catalyzed N Arylation of Amines, Anilines, and Imidazoles
Authors: Yu Xiao‐Qiang , Yamamoto Yasunori , Miyaura Norio 
Published: June 2008

AbstractThe N arylation of primary and secondary aliphatic amines, anilines, and imidazoles with novel potassium aryl triolborates was carried out in the presence of a reoxidant and a catalytic amount of Cu(OAc)2 (10 mol %). Aryl triolborates were found to be better reagents than aryl boronic acids or potassium aryl trifluoroborates as the former achieved high yields under mild conditions. Coupling of primary and secondary aliphatic amines to give N‐aryl amines in excellent yields was performed under oxygen atmosphere. The reactions of anilines and imidazoles to provide N‐aryl anilines and N‐aryl imidazoles in good yields proceeded smoothly when trimethylamine N‐oxide was used as an oxidant.
A hybrid framework for resource allocation among multiple agents moving on discrete environments
Authors: Piovesan Jorge L. , Abdallah Chaouki T. , Tanner Herbert G. 
Published: June 2008

AbstractWe consider the problem of controlling a multi‐agent system whose agents move across discrete locations. The agents attempt to extract resources from the environment while the environment, which may vary as the system evolves, distributes its resources according to the agents requests. The environment is modeled as a network of discrete nodes. Our ultimate goal is to design the dynamical policies that determine the behavior of agents and nodes, such that the usage of resources in the network is optimized. We propose a hybrid model to describe both agents and nodes. Several components of this model are design variables that may be obtained analytically. We then formulate an optimization problem that may be decomposed into two hierarchical optimization problems: an integer optimization problem that considers the distribution of agents among the nodes of the network; and a convex optimization problem within each node that corresponds to the distribution of resources of each node among its resident agents. We show that the optimization problem within each node is a special case of the formulation that models congestion control algorithms in the internet. We then use available results to solve a portion of the proposed hybrid description for agents and nodes. Moreover, we show that the resulting continuous dynamics are globally asymptotically stable, with their equilibrium point coinciding with the solution of the optimization problem. As a consequence, the proposed continuous dynamics yield an interconnected system that is stable on each possible configuration of agents and nodes. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Antioxidants for improving storage stability of biodiesel
Authors: Dunn Robert O. 
Published: June 2008

AbstractBiodiesel is an alternative diesel fuel made from vegetable oil or animal fat that may be burned in a compression‒ignition (diesel) engine. The chemical nature of biodiesel makes it more susceptible to oxidation or autoxidation during long‒term storage than conventional petroleum‒based diesel (petrodiesel). Oxidative degradation during storage can compromise fuel quality with respect to effects on kinematic viscosity, acid value (number), cetane number, total ester content, and formation of hydroperoxides, soluble polymers, and other secondary products. One promising method of increasing the resistance to oxidation of biodiesel is to add oxidation inhibitors (antioxidants). This review summarizes relevant research progress in the development of effective antioxidants for treating biodiesel. Performance of antioxidants evaluated for treating biodiesel derived from soybean oil, rapeseed (low‒erucic) oil, used cooking oil, tallow (beef), and palm oil feedstocks is discussed. Published in 2008 by John Wiley & Sons, Ltd
Unique spatial and cellular expression patterns of Hoxa5, Hoxb4, and Hoxb6 proteins in normal developing murine lung are modified in pulmonary hypoplasia
Authors: Volpe MaryAnn Vitoria , Wang Karen Ting Wai , Nielsen Heber Carl , Chinoy Mala Romeshchandra 
Published: June 2008

AbstractBACKGROUND:Hox transcription factors modulate signaling pathways controlling organ morphogenesis and maintain cell fate and differentiation in adults. Retinoid signaling, key in regulating Hox expression, is altered in pulmonary hypoplasia. Information on pattern‐specific expression of Hox proteins in normal lung development and in pulmonary hypoplasia is minimal. Our objective was to determine how pulmonary hypoplasia alters temporal, spatial, and cellular expression of Hoxa5, Hoxb4, and Hoxb6 proteins compared to normal lung development.METHODS:Temporal, spatial, and cellular Hoxa5, Hoxb4, and Hoxb6 expression was studied in normal (untreated) and nitrofen‐induced hypoplastic (NT‐PH) lungs from gestational day 13.5, 16, and 19 fetuses and neonates using Western blot and immunohistochemistry.RESULTS:Modification of protein levels and spatial and cellular Hox expression patterns in NT‐PH lungs was consistent with delayed lung development. Distinct protein isoforms were detected for each Hox protein. Expression levels of the Hoxa5 and Hoxb6 protein isoforms changed with development and were altered further in NT‐PH lungs. Compared to normal lungs, GD19 and neonatal NT‐PH lungs had decreased Hoxb6 and increased Hoxa5 and Hoxb4. Hoxa5 cellular localization changed from mesenchyme to epithelia earlier in normal lungs. Hoxb4 was expressed in mesenchyme and epithelial cells throughout development. Hoxb6 remained mainly in mesenchymal cells around distal airways.CONCLUSIONS:Unique spatial and cellular expression of Hoxa5, Hoxb4, and Hoxb6 participates in branching morphogenesis and terminal sac formation. Altered Hox protein temporal and cellular balance of expression either contributes to pulmonary hypoplasia or functions as a compensatory mechanism attempting to correct abnormal lung development and maturation in this condition. Birth Defects Research (Part A) 2008. © 2008 Wiley‐Liss, Inc.
The effect of salt and phage concentrations on the binding sensitivity of magnetoelastic biosensors for Bacillus anthracis detection
Authors: Huang S. , Yang H. , Lakshmanan R.S. , Johnson M.L. , Chen I. , Wan J. , Wikle H.C. , Petrenko V.A. , Barbaree J.M. , Cheng Z.Y. , Chin B.A. 
Published: June 2008

AbstractThis article presents an investigation of the effect of salt and phage concentrations on the binding affinity of magnetoelastic (ME) biosensors. The sensors were fabricated by immobilizing filamentous phage on the ME platform surface for the detection of Bacillus anthracis spores. In response to the binding of spores to the phage on the ME biosensor, a corresponding decrease occurs in resonance frequency. Transmission electron microscopy (TEM) was used to verify the structure of phage under different combinations of salt/phage concentration. The chemistry of the phage solution alters phage bundling characteristics and, hence, influences both the sensitivity and detection limit of the ME biosensors. The frequency responses of the sensors were measured to determine the effects of salt concentration on the sensors' performance. Scanning electron microscopy (SEM) was used to confirm and quantify the binding of spores to the sensor surface. This showed that 420 mM salt at a phage concentration of 1 × 1011 vir/mL results in an optimal distribution of immobilized phages on the sensor surface, consequently promoting better binding of spores to the biosensor's surface. Additionally, the sensors immobilized with phage under this condition were exposed to B. anthracis spores in different concentrations ranging from 5 × 101 to 5 × 108 cfu/mL in a flowing system. The results showed that the sensitivity of this ME biosensor was 202 Hz/decade. Biotechnol. Bioeng. © 2008 Wiley Periodicals, Inc.
Laparoscopic resection for colorectal cancer
Authors: Buchanan G N , Malik A , Parvaiz A , Sheffield J P , Kennedy R H 
Published: June 2008

Abstract

Background
This study examined one surgeon's practice to determine the place of laparoscopic colorectal cancer surgery.

Methods
Some 365 patients undergoing elective colorectal cancer resection (219 colonic, 146 rectal) were studied prospectively. Early (1994–1997; 104 patients), middle (1998–2001; 112) and late (2002–2005; 149) cohorts were analysed with respect to suitability for laparoscopic surgery, conversion and outcome.

Results
Forty-six of 135 patients undergoing open resection were suitable for laparoscopic surgery but randomized to open surgery. The proportion of attempted laparoscopic resections (35·6, 65·2 and 80·6 per cent in early, middle and late cohorts) and patients thought suitable for laparoscopic resection (37·5, 87·5 and 94·0 per cent respectively; P = 0·001) increased over time. Independent predictors of conversion were rectal cancer surgery (odds ratio (OR) 3·12 versus colonic surgery) and body mass index 28 kg/m2 or more (OR 3·87). Conversion was necessary in all five patients with a threatened margin predicted by preoperative magnetic resonance imaging. After exclusion of these patients the conversion rate in the late cohort was 8·7 per cent. During the same period, inclusion of 20 patients who were suitable for laparoscopic surgery but underwent open resection meant that 135 (90·6 per cent) of 149 patients were actually suitable for laparoscopic resection.

Conclusion
With experience, laparoscopic surgery is feasible in around 90 per cent of elective colorectal cancer resections.
Exploring the Conserved Water Site and Hydration of a Coiled‐Coil Trimerisation Motif: A MD Simulation Study
Authors: Dolenc Jožica , Baron Riccardo , Missimer John H. , Steinmetz Michel O. , van Gunsteren Wilfred F. 
Published: June 2008

AbstractThe solvent structure and dynamics around ccβ‐p, a 17‐residue peptide that forms a parallel three‐stranded α‐helical coiled coil in solution, was analysed through 10 ns explicit solvent molecular dynamics (MD) simulations at 278 and 330 K. Comparison with two corresponding simulations of the monomeric form of ccβ‐p was used to investigate the changes of hydration upon coiled‐coil formation. Pronounced peaks in the solvent density distribution between residues Arg8 and Glu13 of neighbouring helices show the presence of water bridges between the helices of the ccβ‐p trimer; this is in agreement with the water sites observed in X‐ray crystallography experiments. Interestingly, this water site is structurally conserved in many three‐stranded coiled coils and, together with the Arg and Glu residues, forms part of a motif that determines three‐stranded coiled‐coil formation. Our findings show that little direct correlation exists between the solvent density distribution and the temporal ordering of water around the trimeric coiled coil. The MD‐calculated effective residence times of up to 40 ps show rapid exchange of surface water molecules with the bulk phase, and indicate that the solvent distribution around biomolecules requires interpretation in terms of continuous density distributions rather than in terms of discrete molecules of water. Together, our study contributes to understanding the principles of three‐stranded coiled‐coil formation.
ChemInform Abstract: Electronic Structure Study of the [Ag—Ag]4‐, [Au—Au]4‐, and [Hg—Hg]2‐ Zintl Anions in the Intermetallic Compounds Yb3Ag2, Ca5Au4, and Ca3Hg2: Transition Metal Anions as p‐Metal Elements
Authors: Koehler Juergen , Whangbo Myung‐Hwan 
Published: June 2008

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: Electronic Structure and Metal—Metal Interactions in Trinuclear Face‐Shared [M3X12]3‐ (M: Mo, W; X: F, Cl, Br, I) Systems
Authors: Cavigliasso German , Stranger Robert 
Published: June 2008

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: Synthetic Aenigmatite Analogue Na2 (Mn5.26Na0.74)Ge6O20: Structure and Crystal Chemical Considerations.
Authors: Redhammer Guenther J. , Roth Georg , Topa Dan , Amthauer Georg 
Published: June 2008

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 Diphyllosilicate Rb2(VO)2[Si8O19].
Authors: Prinz Sebastian , Sparta Karine M. , Roth Georg 
Published: June 2008

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 Disordered Cluster Compound CaMo5(Mo0.38Ti0.62)O10.
Authors: Gougeon P. , Gall P. 
Published: June 2008

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: La6Br10Fe: A La6Fe Octahedron with a Mixed M6X12/M6X8 Type Environment.
Authors: Zheng Chong , Mattausch Hansjuergen , Hoch Constantin , Simon Arndt 
Published: June 2008

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: Modulated Misfit Structure of the Thermoelectric [Bi0.84CaO2]2 [CoO2]1.69 Cobalt Oxide.
Authors: Muguerra Herve , Grebille Dominique , Guilmeau Emmanuel , Cloots Rudi 
Published: June 2008

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: Evolution of the Crystal Structure of LnVO3 (Ln: La, Ce, Pr, Nd, Tb, Ho, Er, Tm, Yb, Lu, Y) Perovskites from Neutron Powder Diffraction Data.
Authors: Martinez‐Lope M. J. , Alonso J. A. , Retuerto M. , Fernandez‐Diaz M. T. 
Published: June 2008

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: Single‐Crystal X‐Ray Study of Ba2Cu2Te4O11Br2 and Its Incommensurately Modulated Superstructure Companion.
Authors: Fredrickson Takagi Rie , Johnsson Mats , Lidin Sven 
Published: June 2008

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: Characterization and Properties of Novel Infrared Nonlinear Optical Crystal CsGe(BrxCl1‐x)3.
Authors: Lin Zhi‐Guang , Tang Li‐Chuan , Chou Chang‐Pin 
Published: June 2008

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: BaPt4Ge12: A Skutterudite Based Entirely on a Ge Framework.
Authors: Bauer Ernst , et al. et al. 
Published: June 2008

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: Four Isomorphous Phosphates AM3P4O14 (A: Sr, Ba; M: Co, Mn) with Antiferromagnetic—Antiferromagnetic—Ferromagnetic Trimerized Chains, Showing 1/3 Quantum Magnetization Plateaus only in the Manganese(II) System.
Authors: Yang Tao , Zhang Yan , Yang Sihai , Li Guobao , Xiong Ming , Liao Fuhui , Lin Jianhua 
Published: June 2008

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 Isothermal Section of the Co—Ni—Nb Ternary System at 1123 K Determined by Diffusion Triple Technique.
Authors: Wang Y. M. , Liu H. S. , Zheng F. , Jin Z. P. 
Published: June 2008

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 Open‐Framework Silicogermanate with 26‐Ring Channels Built from Seven‐Coordinated (Ge,Si)10(O,OH)28 Clusters.
Authors: Christensen Kirsten E. , Bonneau Charlotte , Gustafsson Mikaela , Shi Lei , Sun Junliang , Grins Jekabs , Jansson Kjell , Sbille Isabelle , Su Bao‐Lian , Zou Xiaodong 
Published: June 2008

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: Alkali Metal (Li+—Cs+) Salts with Hexafluorochromate(V), Hexafluorochromate(IV), Pentafluorochromate(IV), and Undecafluorodichromate(IV) Anions.
Authors: Mazej Zoran , Goreshnik Evgeny 
Published: June 2008

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: Stability of the Infinite Layer Structure with Iron Square Planar Coordination.
Authors: Tassel Cedric , Watanabe Takashi , Tsujimoto Yoshihiro , Hayashi Naoaki , Kitada Atsushi , Sumida Yuji , Yamamoto Takafumi , Kageyama Hiroshi , Takano Mikio , Yoshimura Kazuyoshi 
Published: June 2008

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: Cobalt(II)/Nickel(II)‐Centered Keggin‐Type Heteropolymolybdates: Syntheses, Crystal Structures, Magnetic and Electrochemical Properties.
Authors: Gao Guang‐Gang , Xu Lin , Wang Wen‐Ju , Qu Xiao‐Shu , Liu Hong , Yang Yan‐Yan 
Published: June 2008

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.