bluuebunny/crossref_metadata_2025_split huggingface dataset:
Steric, Electronic, and Secondary Effects on the Coordination Chemistry of Ionic Phosphine Ligands and the Catalytic Behavior of Their Metal Complexes
Authors: Snelders Dennis J. M. , van Koten Gerard , Klein Gebbink Robertus J. M. 
Published: December 2010

AbstractThe effects of introducing ionic functionalities in phosphine ligands on the coordination chemistry of these ligands and the catalytic behavior of the corresponding metal complexes are reviewed. The steric and electronic consequences of such functionalizations are discussed. Apart from these steric and electronic effects, the presence of charged groups often leads to additional, supramolecular interactions that occur in the second coordination sphere of the metal complex, such as intramolecular, interligand hydrogen bonding and Coulombic repulsion. These interactions can significantly alter the behavior of the phosphine ligand in question. Such effects have been observed in phosphine–metal association/dissociation equilibria, ligand substitution reactions, and stereoisomerism in phosphine–metal complexes. By drawing general conclusions, this review offers an insight into the coordination and catalytic behavior of phosphine ligands containing ionic functionalities and their corresponding metal complexes.
Spontaneous Formation of Biocompatible Vesicles in Aqueous Mixtures of Amino Acid‐Based Cationic Surfactants and SDS/SDBS
Authors: Shome Anshupriya , Kar Tanmoy , Das Prasanta K. 
Published: December 2010

AbstractThe spontaneous formation of vesicles by six amino acid‐based cationic surfactants and two anionic surfactants (sodium dodecylbenzene sulfonate (SDBS) and sodium dodecyl sulfate (SDS)) is reported. The head‐group structure of the cationic surfactants is minutely altered to understand their effect on vesicle formation. To establish the regulatory role of the aromatic group in self‐aggregation, both aliphatic and aromatic side‐chain‐substituted amino acid‐based cationic surfactants are used. The presence of aromaticity in any one of the constituents favors the formation of vesicles by cationic/anionic surfactant mixtures. The formation of vesicles is primarily dependent on the balance between the hydrophobicity and hydrophilicity of both cationic and anionic surfactants. Vesicle formation is characterized by surface tension, fluorescence anisotropy, transmission electron microscopy, dynamic light scattering, and phase diagrams. These vesicles are thermally stable up to 65 °C, determined by temperature‐dependent fluorescence anisotropy. According to the MTT assay, these catanionic vesicles are nontoxic to NIH3T3 cells, thus indicating their wider applicability as delivery vehicles to cells. Among the six cationic surfactants examined, tryptophan‐ and tyrosine‐based surfactants have the ability to reduce HAuCl4 to gold nanoparticles (GNPs), which is utilized to obtain in‐situ‐synthesized GNPs entrapped in vesicles without the need for any external reducing agent.
Integrative approaches to morphogenesis: Lessons from dorsal closure
Authors: Gorfinkiel Nicole , Schamberg Sabine , Blanchard Guy B. 
Published: December 2010

AbstractAlthough developmental biology has been dominated by the genetic analysis of embryonic development, in recent years genetic tools have been combined with new approaches such as imaging of live processes, automated and quantitative image analysis, mechanical perturbation and mathematical modeling, to study the principles underlying the formation of organisms. Here we focus on recent work carried out on Dorsal Closure, a morphogenetic process during Drosophila embryogenesis, to illustrate how this multidisciplinary approach is yielding new and unexpected insights into how cells organize themselves through the activity of their molecular components to give rise to the stereotyped and macroscopic movements observed during development. genesis 49:522–533, 2011. © 2010 Wiley‐Liss, Inc.
Low‐Coordinate Aluminum Amides from Silylanilines and Alkylalanes
Authors: Khandelwal Manish , Powell Douglas R. , Wehmschulte Rudolf J. 
Published: December 2010

AbstractThe aluminum amides R2AlN(Ar)SiMe3 [R = Et, Ar = Dipp, 1 (Dipp = 2,6‐iPr2C6H3‐); R = iBu, Ar = Dipp, 2; R = Et, Ar = Mes, 3 (Mes = 2,4,6‐Me3C6H2‐); R = iBu, Ar = Mes, 4] were prepared by ethane or hydrogen elimination reaction between Et3Al or iBu2AlH and ArN(H)SiMe3 in refluxing hexane solution. The LiCl salt elimination route resulted in the formation of the monomeric aluminum amide Et2AlN(Mes)SiPh3 (5) featuring three‐coordinate aluminum and nitrogen centers. In addition, the synthesis and characterization of the dinuclear species Ph2Si{N(Mes)AlEt2}2 (6) and the hydride‐bridged eight‐membered ring compound {MesN(SiMe3)Al(iBu)(μ‐H)}2(μ‐LiH)(μ‐iBu2AlH) (7) are reported. All compounds have been characterized by 1H and 13C{1H} NMR spectroscopy, and compounds 5, 6, and 7 have also been characterized by single‐crystal X‐ray crystallography.
L‐t‐Leucine‐Catalyzed Direct Asymmetric Aldol Reaction of Cyclic Ketones
Authors: Kanemitsu Takuya , Umehara Atsushi , Miyazaki Michiko , Nagata Kazuhiro , Itoh Takashi 
Published: December 2010

AbstractL‐t‐Leucine‐catalyzed direct asymmetric aldol reactions are described. In the aldol reaction of p‐nitrobenzaldehyde with a cyclic ketone at room temperature, L‐t‐leucine exhibits catalytic activity resulting in moderate to high diastereo‐ and enantioselectivity. Use of cycloheptanone or cyclooctanone as a substrate resulted in production of the syn selective product.
Nanohybrid Materials as Transducer Surfaces for Electrochemical Sensing Applications
Authors: Pereira da Silva Neves Marta Maria , García María Begoña González , Delerue‐Matos Cristina , García Agustín Costa 
Published: December 2010

AbstractA nanohybrid electrochemical transducer surface was developed using carbon and gold nanomaterials. The strategy relayed on casting multiwalled carbon nanotubes or carbon nanofibers onto a screen‐printed carbon electrode surface, followed by in situ generation of gold nanoparticles by electrochemical deposition of ionic gold, in a reproducible manner. These transducers, so fabricated, were characterized using both electrochemical and microscopic techniques. Biofunctionality was evaluated using the streptavidin‐biotin interaction system as the biological reaction model. These platforms allow to achieve low detection limits (in the order of pmoles), are reproducible and stable at least for a month after their preparation, being a perfect candidate to be used as transducer of different sensor devices.
Carbon Supported Cobalt and Nickel Based Nanomaterials for Direct Uric Acid Determination
Authors: Singh Baljit , Laffir Fathima , Dickinson Calum , McCormac Timothy , Dempsey Eithne 
Published: December 2010

AbstractNovel Co‐Ni based catalysts on activated carbon support were prepared using NaBH4 as a reducing agent in aqueous conditions and examined with respect to direct amperometric uric acid detection. The surface morphology and composition of the synthesised materials were examined using transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and X‐ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) was employed in order to confirm the typical metallic electrochemical response of the Co, Ni and Co‐Ni based materials. The combination of metal hydroxides/oxides and nanoparticles in the carbon supported Co‐Ni based materials were found to play a key role in uric acid determination. Upon surface confinement of the Co1Ni1/C material, uric acid sensitivity 248.2 µA mM−1 cm−2 and limit of detection 0.08 µM at Eapp=+0.4 V vs. Ag/AgCl was found by hydrodynamic amperometry over the range 0–250 µM (r2=0.9992). The sensor provided linear and reproducible behaviour over a wide range (25–575 µM) of uric acid. The composite materials showed excellent selectivity with respect to commonly found interferences with no response even at 10‐fold concentration of urea, glucose and oxalate, and minimal influence of ascorbic acid (2 fold concentration). Overall, these materials are excellent candidates for direct uric acid detection in a stable, sensitive and very specific fashion over relevant physiological ranges, eliminating the pH, temperature sensitivity and lifetime issues associated with enzyme based systems. The materials are very promising for a range of applications including wound care/management and as non‐enzymatic disposable uric acid test strips.
A Sensitive Glucose Biosensor Based on Brushite, a Biocompatible Cement
Authors: López M. Sánchez‐Paniagua , López‐Ruiz B. 
Published: December 2010

AbstractA highly sensitive biosensor based on glucose oxidase (GOx) immobilized on brushite cement is described. Biosensor was kept free of the interferences produced by ascorbic and uric acid by placing an extra Nafion film on the surface of the platinum electrode. Variables involved in the enzyme immobilization method were investigated. The biosensor exhibits a rapid response (10 s); a wide linear range (9×10−6 M to 3×10−3 M); low detection limit (9 µM); and high sensitivity (52.5±0.6 mA M−1 cm−2). Nafion/GOx/brushite biosensor was used to monitor the glucose levels of serum samples and satisfactory results were obtained.
Electrochemical Behavior and Electroanalytical Determination of Indole‐3‐Acetic Acid Phytohormone on a Boron‐Doped Diamond Electrode
Authors: Yardım Yavuz , Erez M. Emre 
Published: December 2010

AbstractIn this work, a boron‐doped diamond (BDD) electrode was used for the electroanalytical determination of indole‐3‐acetic acid (IAA) phytohormone by square‐wave voltammetry. IAA yielded a well‐defined voltammetric response at +0.93 V (vs. Ag/AgCl) in Britton–Robinson buffer, pH 2.0. The process could be used to determine IAA in the concentration range of 5.0 to 50.0 µM (n=8, r=0.997), with a detection limit of 1.22 µM. The relative standard deviation of ten measurements was 2.09 % for 20.0 µM IAA. As an example, the practical applicability of BDD electrode was tested with the measurement of IAA in some plant seeds.
A modified measure of health care disparities applied to birth weight disparities and subsequent mortality
Authors: Butler Richard J. , Wilson Barbara L. , Johnson William G. 
Published: December 2010

SUMMARYWe describe how a modified Gini index serves as an improved method of estimating health care disparities. The method, although general, is applied to an example of birth weight disparities and to their effect on subsequent mortality. The method provides the between‐group results obtainable from current methods (i.e. how Hispanics generally fare relative to non‐Hispanic Whites) but adds measures of within‐group disparities (i.e. which specific Hispanics experience the greatest disparate treatment). Our application to birth weights and receipt of prenatal care, which may provide an upper bound because of omitted variables, shows that the time‐of‐birth disparities are associated with increased infant mortality within the first year of life. Copyright © 2010 John Wiley & Sons, Ltd.
Retained role of surgery for olfactory neuroblastoma
Authors: Smee Robert I. , Broadley Kathryn , Williams Janet R. , Meagher Nicola S. , Bridger G. Patrick 
Published: December 2010

AbstractBackgroundOlfactory neuroblastoma is a rare paranasal sinus malignancy. The traditional approach was craniofacial resection (CFR) and then postoperative radiotherapy until 1998. This review will chart development of a new protocol.MethodsThis ethics‐approved audit evaluated the number of new patients diagnosed with olfactory neuroblastoma, with information relating to patient, disease, and treatment factors noted.ResultsThere were 24 eligible patients, 16 men, 8 women, 7 Kadish stage B, 17 stage C. The planned treatment was: chemotherapy (cisplatin/etoposide) and determine treatment dependent on response in 6 patients, surgery and radiotherapy in 16 patients, and single‐modality treatment only (surgery, radiotherapy 1) in 2 patients. Surgery to radiotherapy occurred in 17 patients. With salvage treatment ultimate local control was 79%.ConclusionsThere was a higher local control in those patients who had surgery; abandoning this may carry a higher risk of local failure. The use of response to chemotherapy to determine local treatment remains experimental. © 2010 Wiley Periodicals, Inc. Head Neck, 2010
Total Synthesis of Aculeatins A and B from L‐Malic Acid
Authors: Yadav Jhillu S. , Rao Yerragorla Gopala , Chandrakanth Dandekar , Ravindar Kontham , Reddy Basi V. Subba 
Published: December 2010

AbstractAn efficient total synthesis of the cytotoxic spiroketal natural products aculeatin A and B is described. The synthesis of the 1,3,5‐triol moiety with appropriate configuration was accomplished from the commercially available L‐malic acid. The key steps in this synthesis are the Barbier allylation, LiAlH4/LiI‐mediated syn‐stereoselective 1,3‐asymmetric reduction, and phenyliodine bis(trifluoroacetate) (=[bis(trifluoroacetoxy)iodo]benzene; PIFA) mediated oxidative spirocyclization.
A Unique Indolo‐[1,7]naphthyridine Alkaloid from Incarvillea mairei var. grandiflora (Wehrh.) Grierson
Authors: Shen Yun‐Heng , Su Yong‐Qing , Tian Jun‐Mian , Lin Sheng , Li Hui‐Liang , Tang Jian , Zhang Wei‐Dong 
Published: December 2010

AbstractA novel alkaloid with a unique indolo‐[1,7]naphthyridine nucleus, incargranine B, was isolated from the whole plant of Incarvillea mairei var. grandiflora (Wehrh.) Grierson. Its structure was determined by means of spectroscopic methods.
Sesquiterpenoids from Senecio argunensis
Authors: Xie Wei‐Dong , Niu Yu‐Fang , Huang Jian‐Jun , Row Kyung‐Ho 
Published: December 2010

AbstractInvestigation of unpolar extracts from the aerial parts of Senecio argunensis afforded two new sesquiterpenoids, 1β‐hydroxyeudesma‐4,11‐dien‐15‐al (1) and 4(15)‐cadinene‐5α,10α‐diol, (2) as well as six known compounds, 3–8. The structures of all isolates were elucidated on the basis of extensive analyses of spectroscopic data and comparison with literature data.
Neolignans and Caffeoyl Derivatives from Selaginella moellendorffii
Authors: Wang Yue‐Hu , Sun Qian‐Yun , Yang Fu‐Mei , Long Chun‐Lin , Zhao Fu‐Wei , Tang Gui‐Hua , Niu Hong‐Mei , Wang Huan , Huang Qiao‐Qin , Xu Jin‐Jin , Ma Li‐Juan 
Published: December 2010

AbstractTen new phenolic compounds including the six neolignans 1–3 and 6–8 and four caffeoyl derivatives, i.e., myo‐inositol 1‐caffeate (9), myo‐inositol 6‐caffeate (10), myo‐inositol 5‐caffeate (11), and paucine 3′‐β‐D‐glucopyranoside (12) were isolated from the whole plants of Selaginella moellendorffii (caffeic acid=3‐(3,4‐dihydroxyphenyl)prop‐2‐enoic acid). Their structures were established by spectroscopic and chemical methods.
Withanolides from Aureliana fasciculata var. fasciculata
Authors: Almeida‐Lafetá Rita C. , Ferreira Marcelo J. P. , Emerenciano Vicente P. , Kaplan Maria A. C. 
Published: December 2010

AbstractIn the first phytochemical study of the Aureliana genus (Solanaceae), two new withanolides, 1 and 2, together with two known sterols, were isolated from the MeOH extract of the leaves of Aureliana fasciculata var. fasciculata. The structures were established as (4S,22R)‐16α‐acetoxy‐5β,6β‐epoxy‐4β,17α‐dihydroxy‐1‐oxowitha‐2,24‐dienolide (aurelianolide A) and (4S,22R)‐16α‐acetoxy‐4β,17α‐dihydroxy‐1‐oxowitha‐2,5,24‐trienolide (aurelianolide B). The new compounds possessed the unusual 16α,17α‐dioxygenated group and were fully characterized by spectroscopic techniques, including 1H‐ and 13C‐NMR (DEPT), as well as 2D‐NMR (HMBC, HMQC, 1H,1H‐COSY, NOESY) experiments, and HR‐MS.
Biologically Active Iridoids from Hedyotis diffusa
Authors: Ding Bo , Ma Wei‐Wei , Dai Yi , Gao Hao , Yu Yang , Tao Ye , Zhong Yi , Yao Xin‐Sheng 
Published: December 2010

AbstractTwo new iridoids, 10‐O‐benzoyl‐6′‐O‐α‐L‐arabino(1→6)‐β‐D‐glucopyranosylgeniposidic acid (1), deacetyl‐6‐ethoxyasperulosidic acid methyl ester (2), along with 14 other known iridoids, were isolated from the whole plant of Hedyotis diffusa Willd. Their structures were determined on the basis of spectroscopic analysis. The short‐term‐memory‐enhancement activities of compounds 1, 7–9, 11, and 13 were evaluated on an Aβ transgenic drosophila model.
Two New Monoterpenes from Mentha haplocalyxBriq.
Authors: She Gaimei , Xu Chao , Liu Bin , Shi Renbing 
Published: December 2010

AbstractTwo new monoterpenes with a skeleton similar to the 1,8‐cineole skeleton, i.e., (1R,4R)‐3,3,5‐trimethyl‐2‐oxabicyclo[2.2.2]oct‐5‐en‐4‐ol (1) and (1R,4R)‐4‐methoxy‐3,3,5‐trimethyl‐2‐oxabicyclo[2.2.2]oct‐5‐ene (2), were isolated from an aqueous acetone extract of the aerial parts of Mentha haplocalyx, together with three known compounds. Their structures were elucidated by extensive spectroscopic methods and by comparison with reference values.
Colorful window dressing: A critical review on workplace diversity in three major American corporations
Authors: Marques Joan F. 
Published: December 2010

AbstractThis article presents a brief diversity audit of three major U.S. corporations, who share some interesting common traits. The attractive diversity delineations posted on these company's Web sites will be reviewed, followed by their issues with the same topic in the past few decades. This threefold audit is followed by two important observations about U.S. and non‐U.S. companies, based on company diversity audits applied over the course of 5 years by more than 150 management university students. The author claims that a large number of major corporations in the United States are going out of their way to post diversity statements on their Web sites and to collect diversity‐based awards from numerous minority‐promoting organizations, but they overlook one small aspect: walking their talk. Theoretical and practical implications for HRD professionals are included.
Examining the role of perceived leader behavior on temporary employees' organizational commitment and citizenship behavior
Authors: Djibo Idriss J. A. , Desiderio Katie P. , Price Noriece M. 
Published: December 2010

AbstractThe attention given to the contingent segment of the workforce has significantly increased over the past decade. Investigative topics include the correlates of temporary employee work attitudes and behaviors. This study used a correlational design to examine leader behaviors outlined by the path–goal theory of leadership, as perceived by temporary employees (N = 126), as a determinant of their organizational commitment and citizenship behaviors. The results indicated that temporary workers' affective commitment was positively related to perceptions of instrumental and supportive leadership. The latter was also significantly related to the participants' organizational citizenship behavior. Implications for both research and practice are discussed.
Investigating the influences of core self‐evaluations, job autonomy, and intrinsic motivation on in‐role job performance
Authors: Joo Baek‐Kyoo (Brian) , Jeung Chang‐Wook , Yoon Hea Jun 
Published: December 2010

AbstractThis study investigates the effects of core self‐evaluations, job autonomy, and intrinsic motivation on employees' perceptions of their in‐role job performance, based on a cross‐sectional survey of 283 employees in a Fortune Global 100 company in Korea. The results suggest that employees perceived higher in‐role job performance when they had higher core self‐evaluations and intrinsic motivation. Intrinsic motivation partially mediated the relationship between core self‐evaluations and job performance, and it also fully mediated the relationship from job autonomy to job performance. Thus, to increase motivation and job performance, managers and HRD professionals need to create an integrated strategy incorporating enhancement of selection methods, elements of job redesign, and interpersonal developmental practices such as coaching and mentoring.
Toward a theoretical model of dispositional influences on transfer of learning: A test of a structural model
Authors: Yamkovenko Bogdan , Holton Ed 
Published: December 2010

AbstractThis study explores the hypothesized relationship between dimensions of the Five Factor model of personality, goal orientation, self‐efficacy, and intent to transfer training on the job. This study attempts to model the complex relationship between these characteristics and intent to transfer using structural equation modeling approach. A set of propositions is presented for each individual variable and its relationship to intent to transfer. Finally, a model of relationships is tested and the results are discussed. The findings revealed that conscientiousness was the only dispositional variable that had a significant relationship to intent to transfer. In addition, control variables, learner readiness and motivation to transfer, were significant in the model. The results suggest that dispositions may not be as important in the transfer system as other constructs like situational, motivational, and ability variables. Recommendations for further research and testing of the model are discussed.
The influence of perceived characteristics of management development programs on employee outcomes
Authors: Ardts Joost C. A. , van der Velde Mandy E. G. , Maurer Todd J. 
Published: December 2010

AbstractEmployees' perceptions of Management Development (MD) programs is the topic of this study. The purpose is to examine the influence of three important perceived characteristics of MD programs on relevant MD outcomes. The MD characteristics are: availability of role models, perceived control, and understanding the MD program. Outcomes are: participation in development activities, MD and job satisfaction, affective organizational commitment, perceived benefits of development activities, average salary growth, innovative behavior, and critical opinion sharing. Data are collected from 453 MD participants of seven organizations in the Netherlands. Findings show that perceived control has a positive relationship with MD satisfaction and extrinsic and organizational benefits of development activities. Understanding the MD program positively influences MD satisfaction and extrinsic benefits. Availability of role models has a positive relationship with intrinsic and organizational benefits.
Stability, change, and the stability of change in daily workplace affect
Authors: Beal Daniel J. , Ghandour Louma 
Published: December 2010

AbstractDaily affect often is determined by unpredictable events, but also has predictable components. We describe how the simultaneous modeling of overall affect level, cyclical variation in affect, and the occurrence of affective events can provide a clearer understanding of how affective well‐being fluctuates over time. We examined intrinsic task motivation as a positive affective event, and had an opportunity to examine a single large negative affective event as well. Specifically, data collection was interrupted by a hurricane which made landfall very close to the data collection site, disrupting the lives of employees for weeks or months. We hypothesized that affect spin—an individual difference measure of variability in the affect circumplex—would increase reactions both to positive and negative affective events. These ideas were examined with 65 employees who provided daily ratings of affect for 21 days. Positive affect was influenced by several factors, whereas negative affect was less predictable. Affect spin moderated many of the dynamic components of daily positive affect, largely supporting the notion that affect spin reflects sensitivity both to positive and negative affective events. Discussion centers on the utility of incorporating dynamic accounts of affect in the study of well‐being and work. Copyright © 2010 John Wiley & Sons, Ltd.