bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental and theoretical investigation of the molecular and electronic structure of N′‐benzylidene‐N‐[4‐(3‐methyl‐3‐phenyl‐cyclobutyl)‐thiazol‐2‐yl]‐chloro‐acetic acid hydrazide
Authors: Demir Sibel , Dinçer Muharrem , Çukurovali Alaaddin , Yilmaz ibrahim 
Published: April 2011

AbstractThe title compound, N′‐benzylidene‐N‐[4‐(3‐methyl‐3‐phenyl‐cyclobutyl)‐thiazol‐2‐yl]‐chloro‐acetic acid hydrazide, has been synthesized and characterized by elemental analysis, IR, 1H and 13C NMR, and X‐ray single crystal diffraction. The compound crystallizes in the orthorhombic space group P 21 21 21 with a = 5.8671 (3) Å, b = 17.7182 (9) Å, and c = 20.6373 (8) Å. Moreover, the molecular geometry from X‐ray experiment, the molecular geometry, vibrational frequencies, and gauge‐including atomic orbital 1H and 13C chemical shift values of the title compound in the ground state have been calculated by using the Hartree–Fock and density functional methods (B3LYP) with 6‐31G(d) and 6‐31G(d,p) basis sets. The results of the optimized molecular structure are exhibited and compared with the experimental X‐ray diffraction. Besides, molecular electrostatic potential, Frontier molecular orbitals, and thermodynamic properties of the title compound were determined at B3LYP/6‐31G(d) levels of theory. © 2011 Wiley Periodicals, Inc. Int J Quantum Chem, 2012
Temperature dependence of the rate constant of ionic analogs of H + H2 → H2 + H reaction by quantum instanton method
Authors: Buchowiecki Marcin 
Published: April 2011

AbstractRate constant ratios k(T)/k(1,500K) for two symmetrical reactions H− + H2 → H2 + H− and H+ + H2 → H2 + H+ are reported. Direct method based on quantum instanton approximation for evaluation of the temperature dependence of the quantum‐mechanical reaction rate constant is used. Implementation of the theory involves thermodynamic integration and path integral Monte Carlo method. Results of anionic case shows resemblance to neutral case, whereas cationic case is significantly different and below 1,000K rate constant shows strong deviation form linearity of Arrhenius plot due to high activation barrier. © 2011 Wiley Periodicals, Inc. Int J Quantum Chem, 2012
The potential role of self‐sampling for high‐risk human papillomavirus detection in cervical cancer screening
Authors: Schmeink Channa E. , Bekkers Ruud L. M. , Massuger Leon F. A. G. , Melchers Willem J. G. 
Published: April 2011

SUMMARYHigh‐risk human papillomavirus (hr‐HPV) detection will become an important tool in the screening for cervical cancer. Self‐sampling is an inexpensive and well‐accepted method for HPV detection that will increase participation of nonresponders in current screening programs. Even more, because self‐collected samples are as good as physician‐collected samples for HPV detection, self‐sampling might be a suitable method for future primary cervical cancer screening. Copyright © 2011 John Wiley & Sons, Ltd.
How to control an infectious bead string: nucleosome‐based regulation and targeting of herpesvirus chromatin
Authors: Nevels Michael , Nitzsche Alexandra , Paulus Christina 
Published: April 2011

SUMMARYHerpesvirus infections of humans can cause a broad variety of symptoms ranging from mild afflictions to life‐threatening disease. During infection, the large double‐stranded DNA genomes of all herpesviruses are transcribed, replicated and encapsidated in the host cell nucleus, where DNA is typically structured and manoeuvred through nucleosomes. Nucleosomes individually assemble DNA around core histone octamers to form ‘beads‐on‐a‐string’ chromatin fibres. Herpesviruses have responded to the advantages and challenges of chromatin formation in biologically unique ways. Although herpesvirus DNA is devoid of histones within nucleocapsids, nuclear viral genomes most likely form irregularly arranged or unstable nucleosomes during productive infection, and regular nucleosomal arrays resembling host cell chromatin in latently infected cells. Besides variations in nucleosome density, herpesvirus chromatin ‘bead strings’ undergo dynamic changes in histone composition and modification during the different stages of productive replication, latent infection and reactivation from latency, raising the likely possibility that epigenetic processes may dictate, at least in part, the outcome of infection and ensuing pathogenesis. Here, we summarise and discuss several new and important aspects regarding the nucleosome‐based mechanisms that regulate herpesvirus chromatin structure and function in infected cells. Special emphasis is given to processes of histone deposition, histone variant exchange and covalent histone modification in relation to the transcription from the viral genome during productive and latent infections by human cytomegalovirus and herpes simplex virus type 1. We also present an overview on emerging histone‐directed antiviral strategies that may be developed into ‘epigenetic therapies’ to improve current prevention and treatment options targeting herpesvirus infection and disease. Copyright © 2011 John Wiley & Sons, Ltd.
Dynamic output feedback integral sliding mode control design for uncertain systems
Authors: Chang Jeang‐Lin 
Published: April 2011

SUMMARYThis paper addresses the problem of designing a dynamic output feedback sliding mode control algorithm for linear MIMO systems with mismatched parameter uncertainties along with disturbances and matched nonlinear perturbations. Once the system is in the sliding mode, the proposed output‐dependent integral sliding surface can robustly stabilize the closed‐loop system and obtain the desired system performance. Two types of mismatched disturbances are considered and their effects on the sliding mode are explored. By introducing an additional dynamics into the controller design, the developed control law can guarantee that the system globally reaches and is maintained on the sliding surface in finite time. Finally, the feasibility of the proposed method is illustrated by numerical examples. Copyright © 2011 John Wiley & Sons, Ltd.
Interconnected jumping time‐delay systems: Mode‐dependent decentralized stability and stabilization
Authors: Mahmoud Magdi S. 
Published: April 2011

SUMMARYIn this paper, we deal with the problems of mode‐dependent decentralized stability and stabilization with ℋ︁∞ performance for a class of continuous‐time interconnected jumping time‐delay systems. The jumping parameters are governed by a finite state Markov process and the delays are unknown time‐varying and mode‐dependent within interval. The interactions among subsystems satisfy quadratic bounding constraints. To characterize mode‐dependent local stability behavior, we employ an improved Lyapunov–Krasovskii functional at the subsystem level and express the stability conditions in terms of linear matrix inequalities (LMIs). A class of local decentralized state‐feedback controllers is developed to render the closed‐loop interconnected jumping system stochastically stable. Then, we extend the feedback strategy to dynamic observer‐based control and establish the stochastic stabilization via LMIs. It has been established that the developed results encompass several existing results as special cases which are illustrated by simulation of examples. Copyright © 2011 John Wiley & Sons, Ltd.
Adaptive output feedback control of uncertain nonlinear systems based on dynamic surface control technique
Authors: Liu Yan‐Jun , Wang Wei 
Published: April 2011

SUMMARYAn adaptive output feedback control approach is studied for a class of uncertain nonlinear systems in the parametric output feedback form. Unlike the previous works on the adaptive output feedback control, the problem of ‘explosion of complexity’ of the controller in the conventional backstepping design is overcome in this paper by introducing the dynamic surface control (DSC) technique. In the previous schemes for the DSC technique, the time derivative for the virtual controllers is assumed to be bounded. In this paper, this assumption is removed. It can be proven that the resulting closed‐loop system is stable in the sense that all the signals are semi‐global uniformly ultimately bounded and the system output tracks the reference signal to a bounded compact set. A simulation example is given to verify the effectiveness of the proposed approach. Copyright © 2011 John Wiley & Sons, Ltd.
Performance analysis for multi‐delay systems in finite frequency domains
Authors: Zhang Xiao‐Ni , Yang Guang‐Hong 
Published: April 2011

SUMMARYThis paper considers the problem of performance analysis for continuous‐time multi‐delay systems in finite frequency domains. Unlike the existing results about the performance analysis for time‐delay systems in the entire frequency range, this study is focused on examining the performances of time‐delay systems in finite frequency ranges. Based on a further generalization of the strict S‐procedure, a delay‐dependent sufficient condition for systems to satisfy performances in finite frequency intervals is developed in the framework of linear matrix inequality approach. Finally, the effectiveness of the proposed method is illustrated via some numerical examples. Copyright © 2011 John Wiley & Sons, Ltd.
Robust smart‐cards‐based user authentication scheme with user anonymity
Authors: Wu Shuhua , Zhu Yuefei , Pu Qiong 
Published: April 2011

AbstractIn this paper, we mainly investigate anonymous user authentication scheme using smart card. We first demonstrate security weaknesses still exist in two such schemes recently propose by Wang et al. and Tsai et al., respectively according to Wang et al.'s criteria. Thereafter, we propose an enhanced smart‐card‐based authentication scheme with user anonymity for providing all the admired requirements at the same time. Compared with the previous schemes, our scheme is yet efficient both in computation and communication cost. Moreover, we can prove the security of the proposed scheme in the random oracle model. Copyright © 2011 John Wiley & Sons, Ltd.
The breakage and damage of plasmid DNA photocatalized by TiO2/carbon nanotube composites
Authors: Li Song , Xiong Xinhong , Li Wenfeng 
Published: April 2011

AbstractIn this paper, the plasmid DNA was used as a target to evaluate the bioeffect of TiO2/Carbon Nanotube (CNT) composites. The conformational change and breakage of DNA induced by the composites were characterized by the integrated tools of electrochemistry, circular dichroism (CD), atomic force microscopy (AFM), and DNA electrophoresis. At the early stage of incubation, the DNA double helix conformation was substantially changed by TiO2/CNT composites. Both electrophoresis and electrochemistry results suggested the breakage and damage appeared on the native DNA molecules. When DNA was treated longer by TiO2/CNT, DNA molecules were broken into fragment. AFM images confirmed the process. The DNA damage was deemed to be a gradual process: supercoiled plasmid DNA was first damaged to nicked‐circle structure, then further to linear form, and then DNA fragment. Copyright © 2011 John Wiley & Sons, Ltd.
Dissolution of copper oxide by the ethanolamine and ammonium fluoride in aqueous solution
Authors: Kwang Ko Cheon , Lee Won Gyu 
Published: April 2011

AbstractDissolution properties of copper oxide in aqueous solutions containing ethanolamine and/or ammonium fluoride have been evaluated at various pH ranges. The dissolution rate was strongly affected by the pH of the solution. The solution of ammonium fluoride showed good properties for the dissolution of copper oxide in the range of acidic conditions, whereas the solution containing ethanolamine showed a dissolution property within the basic condition. A mixture solution of ethanolamine and ammonium fluoride displayed enhanced dissolution property of copper oxide at acidic and basic conditions only. An expected synergy effect on the dissolution rate and selectivity could not be produced through a mixture of ethanolamine and ammonium fluoride in an aqueous solution. Copyright © 2011 John Wiley & Sons, Ltd.
Universal Scaling of the Charge Transport in Large‐Area Molecular Junctions
Authors: Kronemeijer Auke J. , Katsouras Ilias , Huisman Eek H. , van Hal Paul A. , Geuns Tom C. T. , Blom Paul W. M. , de Leeuw Dago M. 
Published: April 2011

AbstractCharge transport through alkanes and para‐phenylene oligomers is investigated in large‐area molecular junctions. The molecules are self‐assembled in a monolayer and contacted with a top electrode consisting of poly(3,4‐ethylenedioxythiophene)–poly(4‐styrenesulfonic acid) (PEDOT:PSS). The complete set of J(V,T) characteristics of both saturated and π‐conjugated molecules can be described quantitatively by a single equation with only two fit parameters. The derived parameters, in combination with a variation of the bulk conductivity of PEDOT:PSS, demonstrate that the absolute junction resistance is factorized with that of PEDOT:PSS.
Chitosan‐Functionalized Graphene Oxide as a Nanocarrier for Drug and Gene Delivery
Authors: Bao Hongqian , Pan Yongzheng , Ping Yuan , Sahoo Nanda Gopal , Wu Tongfei , Li Lin , Li Jun , Gan Leong Huat 
Published: April 2011

AbstractThe covalent functionalization of graphene oxide (GO) with chitosan (CS) is successfully accomplished via a facile amidation process. The CS‐grafted GO (GO–CS) sheets consist of about 64 wt.% CS, which imparts them with a good aqueous solubility and biocompatibility. Additionally, the physicochemical properties of GO–CS are studied. As a novel nanocarrier, GO–CS is applied to load a water‐insoluble anticancer drug, camptothecin (CPT), via π–π stacking and hydrophobic interactions. It is demonstrated that GO–CS possesses a superior loading capacity for CPT, and the GO–CS–CPT complexes show remarkably high cytotoxicity in HepG2 and HeLa cell lines compared to the pure drug. At the same time, GO–CS is also able to condense plasmid DNA into stable, nanosized complexes, and the resulting GO–CS/pDNA nanoparticles exhibit reasonable transfection efficiency in HeLa cells at certain nitrogen/phosphate ratios. Therefore, the GO–CS nanocarrier is able to load and deliver both anticancer drugs and genes.
Characterization of hello message exchange to estimate sensor node's neighborhood residual energy distribution in initialization phase
Authors: Fang Shudong , Berber Stevan Mirko , Swain Akshya Kumar 
Published: April 2011

ABSTRACTThe paper characterizes the hello message exchange (HME) procedure for a sensor node to develop its neighborhood residual energy distribution in the initialization phase of a static wireless sensor network. Because of the lack of coordination on channel access in the initialization phase, hello messages from multiple nodes face a high risk of data collision in the exchange course. A discovery ratio is hereby defined to measure the sufficiency of the HME procedure. The discovery ratio is related to the precision of the parameter estimates for the probability density function of a node's neighborhood residual energy distribution. To achieve an arbitrarily high discovery ratio within a resolvable time interval, the HME procedure is implemented using Birthday protocol, which results in large node energy consumption. To overcome this flaw, a method termed carrier sensing mini‐slot algorithm is proposed to carry out the HME procedure. The time duration and the node energy consumption for the HME procedures based on the Birthday protocol and the carrier sensing mini‐slot algorithm, respectively, are theoretically analyzed and verified by simulations. Copyright © 2011 John Wiley & Sons, Ltd.
Cattle rancher and conservation agency personnel perceptions of wildlife management and assistance programs in Alabama, Florida, Georgia, and Mississippi
Authors: Willcox Adam S. , Giuliano William M. 
Published: April 2011

AbstractNatural resource agencies in the United States continue to design and expand technical and financial assistance programs that benefit private landowners managing for wildlife. Cattle ranchers, one of the primary stakeholders, are well poised to benefit from these programs, especially if they can easily integrate wildlife management activities into cattle operations. A key component to implementing successful wildlife management programs on ranches is to understand how ranchers perceive wildlife management and assistance programs. It is also important that conservation agency personnel working with these ranchers are able to assess rancher perceptions of wildlife management accurately so they can tailor programs that meet rancher needs and foster strong working and interpersonal relationships. We surveyed 1,634 ranchers to understand their perceptions of wildlife benefits and problems, attitudes toward wildlife, and likeliness to participate in financial and technical assistance programs. We also surveyed 52 natural resource‐agency personnel regarding their perceptions of ranchers on similar topics, to allow for direct comparison of responses. Rancher and agency responses were similar for many wildlife benefits and attitudes toward wildlife, yet agency personnel overestimated rancher perceptions of wildlife problems and the economic benefits of wildlife enterprises. We suggest ways conservation agencies can improve current assistance programs for cattle ranchers based on both rancher and agency employee perceptions of wildlife management. This includes emphasizing programs that feature preferred species and better integrating wildlife management with routine cattle operations. © 2011 The Wildlife Society.
Interdisciplinarity and innovation dynamics. On convergence of research, technology, economy, and society
Authors: Mainzer Klaus 
Published: April 2011

AbstractIn the age of globalization, economic growth and the welfare of nations decisively depend on basic innovations. Therefore, education and knowledge is an important advantage of competition in highly developed countries with high standards of salaries, but raw material shortage. In the twenty-first century, innovations will arise from problem-oriented research, crossing over traditional faculties and disciplines. Therefore, we need platforms of interdisciplinary dialogue to choose transdisciplinary problems (e.g., environment, energy, information, health, welfare) and to cluster new portfolios of technologies. The clusters of research during the excellence initiative at German universities are examples of converging sciences. The integration of natural and engineering sciences as well as medicine can only be realized if the research training programs (e.g., graduate schools) generate a considerable added value in terms of multidisciplinary experience, international networking, scientific and entrepreneurial know-how, and personality development. The Carl von Linde-Academy is presented as an example of an interdisciplinary center of research and teaching at the Technical University of Munich.
L’utilisation du MSOME: expérience de six ans
Authors: Dumont M. , Junca A. -M. , Belloc S. , Cohen-Bacrie P. , Cohen-Bacrie M. , Menezo Y. , Benkhalifa M. , de Mouzon J. , Prisant N. 
Published: April 2011

Résumé

Introduction
L’analyse fine de la morphologie des spermatozoïdes à un grossissement de 6600 x, appelée MSOME (motile sperm organellar morphology examination) et appliquée en ICSI, a donné naissance à l’IMSI (intracytoplasmic morphologically selected sperm injection). Cette technique est proposée aux couples en échecs répétés d’implantation embryonnaire en ICSI, dans le but d’obtenir une grossesse évolutive.

Matériel et méthodes
L’étude concerne une cohorte observationnelle de 11535 ICSI pratiquées avec du sperme éjaculé frais, de janvier 2004 à juillet 2009. Parmi celles-ci, 2509 ont été réalisées avec IMSI. Les paramètres étudiés sont: le taux de clivage à J2 par ovocyte injecté, le taux de grossesses cliniques par ponction et le taux de fausses couches spontanées, en fonction du rang de la tentative et/ou de la qualité du sperme du bilan. Ces données ont été comparées entre l’ICSI et l’IMSI et les comparaisons ont été faites à l’aide de Chi2 et d’analyse de variance.

Résultats
Nous n’avons pas observé de différence significative entre l’ICSI et l’IMSI en termes de taux de clivage à J2 et taux de grossesses cliniques. Par contre, le taux de grossesses, en IMSI de rang 1, est significativement plus élevé en cas d’anomalie du sperme si on regroupe les tératozoospermies avec les oligozoospermies et les oligotératozoospermies (34,4 vs 27,1%, p = 0,02). De plus, si l’on regroupe les tératozoospermies et les oligotératozoospermies, le taux de fausses couches est plus faible en IMSI comparé à l’ICSI, de manière proche de la significativité (12,6% vs. 19,6%, p = 0,08).

Conclusion
En présence d’une tératozoospermie sévère, l’IMSI semble augmenter les taux de grossesses et diminuer les taux de fausses couches.
Ectomesenchymal chondromyxoid tumor of the anterior tongue: A rare case
Authors: Sengul Demet , Sengul Ilker , Ozdol Mehmet Umit , Astarci Muzeyyen Hesna , Ustun Huseyin 
Published: April 2011

AbstractEctomesenchymal chondromyxoid tumor is a rare tumor seen in the anterior dorsal aspect of the tongue. Diagnosis of this lesion without a prediagnosis clinically is made only with histopathological findings including the immunohistochemical examinations. However, diverse results are being reported in the literature with keratin staining. While glial fibrillary acid protein positiveness maintain being a fixed repeating feature, we emphasized for our case of a 28‐year‐old Caucasian woman having the findings of qualities supporting the ectomesenchymal origin of the mentioned tumor.
Quality of life and its correlates among heroin users in Taiwan
Authors: Yen Chia‐Nan , Wang Carol Sheei‐Meei , Wang Tzu‐Yun , Chen Hsiao‐Fang , Chang Hsun‐Cheng 
Published: April 2011

AbstractThe aims of this study were to compare the quality of life (QOL) between subjects with and without heroin use and to examine the association of QOL with sociodemographic characteristics, characteristics of heroin use, family support, and depression among heroin users at entry to a methadone maintenance treatment program. A group of 123 heroin users who visited an outpatient addiction treatment clinic in southern Taiwan for methadone maintenance treatment were recruited into this study. We also recruited 106 subjects who had never used heroin as the control group. Their QOL status was assessed by the short form of the Taiwan Version of the World Health Organization Questionnaire on Quality of Life (the WHOQOL‐BREF Taiwan version). The level of QOL between subjects with and without heroin use was compared, and the correlates of QOL among heroin users were examined. Heroin users had poorer QOL than nonusers in the physical, psychological, and social relationship domains but not the environment domain of the WHOQOL‐BREF after controlling for the influences of other factors. In addition, heroin users with obvious depression had poorer QOL in all four domains than those without obvious depression. Also, heroin users who perceived higher family support had better QOL in the social relationship and environment domains. Heroin users had poorer QOL than nonusers in multiple domains. Relief of depressive symptoms and enhancement of family support should be important strategies to improve QOL in heroin users.