bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preference stability belief as a determinant of response to personalized recommendations
Authors: Shen Anyuan , Ball A. Dwayne 
Published: March 2011

AbstractPreference stability refers to the objectively measured choice consistency among options with different attribute values in the same product category. We suggest that a consumer's subjectively held belief of preference stability may be an important determinant of response to personalized recommendations. Experimental results confirm that preference stability belief moderates the effect of customization on the evaluation of recommendation accuracy and receptiveness to the learning relationship. Customization will produce stronger effects on accuracy evaluation and receptiveness for subjects with high preference stability belief than for subjects with low preference stability belief. Customers who believe their preferences are stable appreciate customized recommendations more, notice more acutely whether recommendations are customized or not, and are more receptive to the learning relationship when recommendations are customized than when not. Customers who believe their own preferences are less stable do not appreciate customized recommendations as much, are less sensitive to whether recommendations are customized or not, and are not more receptive to the learning relationship even when recommendations are customized. Theoretical and managerial implications of our findings are discussed. Copyright © 2011 John Wiley & Sons, Ltd.
Selective Adsorption of Co(II) by Mesoporous Silica SBA‐15‐Supported Surface Ion Imprinted Polymer: Kinetics, Isotherms, and Thermodynamics Studies
Authors: Liu Yan , Liu Zhanchao , Dai Jiangdong , Gao Jie , Xie Jimin , Yan Yongsheng 
Published: March 2011

AbstractA novel surface ion imprinted adsorbent [Co(II)‐IIP] using polyethyleneimine (PEI) as function monomer and ordered mesoporous silica SBA‐15 as support matrix was prepared for Co(II) analysis with high selectivity. The prepared polymer was characterized by Fourier transmission infrared spectrometry, scanning electron microscopy, X‐ray diffraction and nitrogen adsorption‐desorption isotherm. Bath experiments of Co(II) adsorption onto Co(II)‐IIP were performed under the optimum conditions. The experimental data were analyzed by pseudo‐first‐order and pseudo‐second‐order kinetic models. It was found that the pseudo‐second‐order model best correlated the kinetic data. The intraparticle diffusion and liquid film diffusion were applied to discuss the adsorption mechanism. The results showed that Co(II) adsorption onto IIP was controlled by the intraparticle diffusion mechanism, along with a considerable film diffusion contribution. Langmuir, Freundlich and Dubinin‐Radushke‐ vich adsorption models were applied to determine the isotherm parameters. Langmuir model fitted the experiment data well and the maximum calculated capacity of Co(II) reached 39.26 mg/g under room temperature. The thermodynamic data were indicative of the spontaneousness of the endothermic sorption process of Co(II) onto Co(II)‐IIP. Co(II)‐IIP showed high affinity and selectivity for template ion compared with non imprinted polymer (NIP).
A New Organic‐Inorganic Hybrid Copper Pentaborate with Free Boric Acid Group
Authors: Lin Dan , You Xiaoyan , Zhu Lixia 
Published: March 2011

AbstractThe hydrothermal reaction of Cu(CH3COO)2·H2O, H3BO3, ethylenediamine and H2O in a molar ratio of 3:20:9:222 at 140°C for 5 d yields the deep blue crystals of a new copper polyborate [Cu(en)2B(OH)3]· [B5O5(OH)7] (enH2NCH2CH2NH2) in 70% yield. It crystallizes in monoclinic system, space group P21/c, with unit cell dimensions, a=1.2779(2) nm, b=1.0167(15) nm, c=1.5019(2) nm, β=90.30(2)°, Z=4. The crystal structure of this compound consists of [Cu(en)2B(OH)3]2+ cation and [B5O5(OH)7]2− anion, which are linked together through hydrogen bonding interactions and electrostatic forces, forming an interesting three‐dimensional framework. The [B5O5(OH)7]2− anion is constituted of [B4O5(OH)4]2− anion and discrete B(OH)3 group which attaches to the side of [B4O5(OH)4]2− through intramolecular hydrogen bonds. Fundamental vibrational modes of this compound were identified and band assignments were made. The middle bands observed at 882 and 575 cm−1 in Raman spectrum are the characteristic peak of B(OH)3 group and [B4O5(OH)4]2− anion, respectively. Additionally the thermal behavior of title compound was recorded and its decomposition mechanism was discussed.
Synthesis, Antiproliferative Activity and DNA‐Binding Properties of Nitrogen and Sulfur Heterocyclic Norcantharidin Acylamide Acid
Authors: Wang Na , Wang Yunyun , Wang Xiaoxia , Zheng Xiaoliang , Yan Dongmeic , Lin Qiuyue 
Published: March 2011

AbstractThree novel norcantharidin acylamide acids (L1N‐thiadiazole norcantharidin acylamide acid, C10H11N3O4S; L2N‐thiazole norcantharidin acylamide acid, C11H12N2O4S and L3N‐benzothiazole norcantharidin acylamide acid, C15H14N2O4S) were synthesized by the reactions of norcantharidin (NCTD7‐oxabicyclo[2,2,1]heptane‐2,3‐dicarboxylic acid anhydride, C8H8O4) with 2‐amino‐1,3,4‐thiadiazole (C2H3N3S), 2‐aminothiazole (C3H4N2S) and 2‐aminobenzothiazole (C7H6N2S), respectively. Their structures were characterized by elemental analysis, IR, and NMR. The inhibition rates of L3 was much higher than those of L1 and L2 against human hepatoma cells SMMC7721 cell lines in vitro. The interaction between the compounds and DNA was studied by means of fluorescence quenching studies and viscosity measurements. The emission intensities decreased obviously with increasing concentration of the compounds in the fluorescence quenching experiments. The linear Stern‐Volmer quenching constant Ksq values were 0.62 (L1), 0.55 (L2) and 1.08 (L3), respectively. The binding abilities followed the trend from high to low were L3, L1 and L2, respectively. The results of viscosity measurements showed that L1 and L2 might bind to DNA via partial intercalation, while L3 bound mainly in intercalation.
Synthesis and Spectral Properties of Novel Water‐soluble Indocyanine Dyes as Fluorescent Dyes for Proteins Detection
Authors: Fu Yile , Wang Lanying , Zhang Xianghan , Lu Tianqin , Xie Qianjie , Shi Zhen 
Published: March 2011

AbstractTwo novel water‐soluble indocyanine dyes were synthesized. Their chemical structures were confirmed by 1H NMR, IR, MS and UV‐vis techniques. The absorptions of the prepared dyes in different solvents were measured. Two dyes exhibited negative solvatochromism, with a blue shift of the absorption and an emission maximum in (bovine serum albumin) protonic solvent relative to non protonic solvent. The fluorescence properties of the dyes in both free state and BSA were investigated. Significant enhancement of the fluorescence intensity for the Dye2 was observed in the presence of BSA. Dye2 could be proposed as fluorescent dyes for BSA detection in aqueous solution.
An Efficient, Three‐component One‐pot Preparation of 1,4‐Dihydropyridines Containing Novel Substituted Pyrazole under Sulfamic Acid Catalysis
Authors: Li Jianping , Qiu Jikuan , Li Huijuan , Zhang Guisheng 
Published: March 2011

AbstractAn efficient approach to 1,4‐dihydropyridines containing novel substituted pyrazole is achieved via three‐component reaction of pyrazolyl aldehyde, β‐ketoester, and ammonium acetate in one‐pot under sulfamic acid catalysis.
Resonance Scattering Effect of Dopamine Product Particle and Its Application to Polyphenoloxidase Activity Assay
Authors: Jiang Caina , Ling Shaoming , Liang Aihui , Ouyang Xiahui , Wang Pengfei , Jiang Zhiliang 
Published: March 2011

AbstractIn pH 7.2 Na2HPO4‐NaH2PO4 buffer solution, polyphenoloxidase (PPO) could catalyze the oxidization of dopamine (DA) to form polymer particles in dark‐red color, which exhibited a strong resonance scattering (RS) peak at 780 nm. In the chosen conditions, as the PPO activity increased, the RS intensity at 780 nm increased linearly. The increased RS intensity (ΔI780 nm) was linear to the PPO activity in the range of 0.10–6.0 U·mL−1, with a regression equation of ΔI780 nm96.6C+15.1, a relative coefficient of 0.9987 and a detection limit of 0.06 U·mL−1 PPO. The proposed method was applied to detecting PPO activity in potato sample with satisfactory results.
Spectroscopic Studies on the Interaction of Asiatic Acid with Bovine Serum Albumin
Authors: Yao Di , Ni Shouhai , Wen Maogui , Bian Hedong , Yu Qing , Liang Hong , Chen Zhenfeng 
Published: March 2011

AbstractFluorescence spectroscopy, Fourier transform infrared (FT‐IR) spectroscopy, circular dichroism (CD) and FT‐Raman spectroscopy were employed to analyze the binding of the asiatic acid (AA) to bovine serum albumin (BSA) under simulative physiological conditions. Fluorescence data revealed that the fluorescence quenching of BSA by AA was the result of the formation of BSA‐AA complex. The fluorescence quenching mechanism of BSA by AA was a static quenching procedure. According to the Van′t Hoff equation, the thermodynamic parameters enthalpy change (ΔH0) and entropy change (ΔS0) for the reaction were evaluated to be −12.55 kJ·mol−1 and 67.08 kJ·mol−1, respectively, indicating that hydrophobic and electrostatic interactions played a major role in stabilizing the complex. The influence of AA on the conformation of BSA has also been analyzed on the basis of FT‐IR, CD and FT‐Raman spectra.
A Novel Fluorescence Quenching Method for the Determination of Aloe Polysaccharide
Authors: Gu Wenxiu , Song Hongyan , Wen Xiaonan , Lu Cunfeng , Xia Wenshui 
Published: March 2011

AbstractAlizarin red (AR) can bind with aloe polysaccharide (APS) in doubly de‐ionized water to form a red complex resulting in fluorescence quenching of it. The maximum fluorescence quenching wavelength is 572 nm. The chromogenic reaction is rapid and the fluorescence intensity remains stable for at least 2 h at room temperature. The quenched fluorescence intensity (ΔF) is directly proportional to APS concentration. Based on this interaction, a sensitive and selective fluorophotometric method is proposed for the determination of APS. The optimal experiment conditions were established. The corresponding linear equation is (F=0.8807C+1.8132, R2=0.9999. The quantification and detection limits are 0.4752 and 0.1425 µg·mL−1, respectively. The linear range is 0.444–16.65 µg·mL−1 for APS and the mean recovery (100.2±2)%, RSD⩽3%. The effect of various substances on the determination of APS was also investigated in detail, and the results show that most of the studied coexistent substances can be tolerated in considerable amounts. The proposed method is sensitive, simple, fast and suitable for routine assay.
Peroxyoxalate Chemiluminescence Based on Fluorescent Conjugated Polymer for the Determination of Triton X‐100
Authors: Jin Yingqiong , Sun Lilin , Hao Dan , She Rui , Qian Zhangsheng , Zhu Changqing , Xiao Qin 
Published: March 2011

AbstractA novel peroxyoxalate chemiluminescence system has been designed for the determination of Triton X‐100 (TX‐100), in which a hydrophobic fluorescent conjugated polymer, poly[2,5‐bisnonyloxy‐1,4‐phenylene‐ethynylene‐9,10‐anthrylene] (PPEA) was employed as a fluorophor. A strong enhanced intensity of chemiluminescence (CL) was observed in the presence of TX‐100, due to the improved emission efficiency of PPEA in the presence of TX‐100. Under optimum conditions, the detection range of Triton X‐100 is between 1.0×10−7 and 1.0× 10−4 mol·L−1, with a detection limit at 6.0×10−8 mol·L−1. The relative standard deviation is 2.4% (n=6) for 1.0×10−6 mol·L−1 Triton X‐100. This method provides satisfying results in the detection of TX‐100 in nature water and biological samples with high sensitivity and wide linear range.
Determination of Hydrocortisone in Cosmetics by CdSe/CdS Quantum Dots‐Based Fluoroimmunoassay Using Magnetic Fe3O4/Au Nanoparticles as Solid Carriers
Authors: Wang Xiuling , Wei Lu , Tao Guanhong , Dai Long 
Published: March 2011

AbstractThis work demonstrated the feasibility of detecting hydrocortisone in cosmetics using a novel CdSe/CdS quantum dots‐based competitive fluoroimmunoassay with magnetic core/shell Fe3O4/Au nanoparticles (MCFN) as solid carriers. Hydrocortisone antigen was labeled with the synthesized core/shell CdSe/CdS quantum dots (QDs) to form the antigen‐QDs conjugate. Meanwhile, hydrocortisone antibody was incubated with MCFN and the immobilized antibody was obtained. The immobilized antibody was then mixed sequentially with hydrocortisone and a slightly excess amount of the QDs‐labeled hydrocortisone antigen, allowing their competition for binding with the antibody immobilized on MCFN. The bound hydrocortisone and the antigen‐QDs conjugates on MCFN were removed subsequently after the mixture was applied to a magnetic force. The analyte concentration was obtained by measuring the fluorescence intensity of the unbound hydrocortisone antigen‐QDs conjugates. The proposed method was characterized by simplicity, rapidity, and high sensitivity with a wide linear working range of 0.5 to 15000 pg·mL−1 and a low detection limit of 0.5 pg·mL−1. The proposed method was successfully applied to the determination of hydrocortisone in cosmetics with satisfactory results.
Unexpected Adsorption Capacity of Ca‐deficient Hydroxyapatite in Oil/water System
Authors: Le Yingyi , Yin Anyuan , Dai Weilin , Fan Kangnian 
Published: March 2011

AbstractHerein, for the first time, we report the unexpected and interesting adsorption capacity of hydroxyapatites to a variety of organics in the presence of water, whose sorption amount could be up to 6 g·g−1.
Correlates of worry about recurrence in a multiethnic population‐based sample of women with breast cancer
Authors: Janz Nancy K. , Hawley Sarah T. , Mujahid Mahasin S. , Griggs Jennifer J. , Alderman Amy , Hamilton Ann S. , Graff John J. , Jagsi Reshma , Katz Steven J. 
Published: March 2011

AbstractBACKGROUND:Worry about recurrence (worry) is a persistent concern of breast cancer survivors. Little is known about whether race/ethnicity or healthcare experiences are associated with worry.METHODS:Women with nonmetastatic breast cancer diagnosed from June 2005 to February 2007 and reported to Detroit or Los Angeles Surveillance, Epidemiology, and End Results registries were surveyed (mean 9 months postdiagnosis); 2290 responded (73%). Latinas and African Americans were oversampled. A worry scale was constructed as the mean score of 3 items (on 5‐point Likert, higher = more worry): worry about cancer returning to the same breast, occurring in the other breast, or spreading to other parts of the body. Race/ethnicity categories were white, African American, and Latina (categorized into low vs high acculturation). The worry scale was regressed on sociodemographics, clinical/treatment, and healthcare experience factors (eg, care coordination collapsed into low, medium, high).RESULTS:Low acculturated Latinas reported more worry and African Americans less worry than whites (P < .001). Other factors independently associated with more worry were younger age, being employed, more pain and fatigue, and radiation (Ps < .05). With all factors in the model, less worry was associated (all Ps < .05) with greater ease of understanding information (2.89, 2.99, 2.81 for low, medium, high), better symptom management (3.19, 2.89, 2.87 for low, medium, high), and more coordinated care (3.36, 2.94, 2.82 for low, medium, high). Race/ethnicity remained significant controlling for all factors (P < .001).CONCLUSIONS:Less acculturated Latina breast cancer patients are vulnerable to high levels of worry. Interventions that improve information exchange, symptom management, and coordinating care hold promise in reducing worry. Cancer 2011. © 2011 American Cancer Society.
Pulmonary metastases in patients with recurrent, treatment‐resistant meningioma
Authors: Alexandru Daniela , Glantz Michael J. , Kim Lyndon , Chamberlain Marc C. , Bota Daniela A. 
Published: March 2011

AbstractBACKGROUND:Meningioma is the most common extra‐axial primary intracranial tumor in adults that rarely metastasizes outside of the central nervous system (CNS). Among recognized sites of metastases, the lung is the most common, but the importance of lung metastases relative to prognosis is unknown. 111Indium (111In)‐octreotide scintigraphy (octreotide scanning) is a valuable imaging modality with which to evaluate intracranial meningiomas and their response to treatment with somatostatin analogues and has the potential to identify extracranial metastatic disease.METHODS:In this retrospective multicenter study, adult patients treated for recurrent meningioma were identified. These patients underwent 111In‐octreotide positron emission tomography/computed tomography imaging (octreotide scintigraphy) and were found to have positive octreotide uptake in their lungs.RESULTS:Six cases were identified with recurrent meningioma (after surgery, radiotherapy, and at least 1 chemotherapy agent) and pulmonary lesions by octreotide scintigraphy. Biopsy of a pulmonary lesion in 1 patient confirmed the diagnosis of metastatic meningioma. Patients with metastatic pulmonary involvement identified by 111In‐octreotide scintigraphy in this case series had an overall survival of 6 months, which is less than that reported from previously published series of patients with unknown systemic disease status.CONCLUSIONS:111In‐octreotide scintigraphy is useful for assessing both CNS disease and extracranial metastases. The presence of pulmonary metastases appears to negatively affect survival in patients with recurrent meningioma. The usefulness of 111In‐octreotide scintigraphy should be considered in staging patients with recurrent meningioma who are considered for further treatment. A prospective study to confirm this finding is warranted. Cancer 2011;. Published 2011 by the American Cancer Society.
A galectin‐3 sequence polymorphism confers TRAIL sensitivity to human breast cancer cells
Authors: Mazurek Nachman , Byrd James C. , Sun Yunjie , Ueno Suguru , Bresalier Robert S. 
Published: March 2011

AbstractBACKGROUND:A common polymorphism, rs4644, coding for Pro64 or His64 of the carbohydrate‐binding protein galectin‐3, influences the susceptibility of galectin‐3 to cleavage by matrix metalloproteinases and is associated with breast cancer incidence. Because forced expression of galectin‐3 in a galectin‐3 null breast cancer cell line confers sensitivity to tumor necrosis factor‐related apoptosis‐inducing ligand (TRAIL), the authors sought to determine whether the His64/Pro64 polymorphism of galectin‐3 affects the sensitivity to TRAIL.METHODS:Genomic DNA of breast cell lines was analyzed for the single nucleotide polymorphism rs4644, and cytotoxicity was determined with the MTT assay.RESULTS:When a collection of 9 breast cancer cell lines that express galectin‐3 was examined for lectin, galactoside‐binding, soluble, 3 (LGALS3) genotype and sensitivity to doxorubicin and TRAIL, doxorubicin sensitivity was not found to be related to LGALS3 genotype. In contrast, none of the 5 cell lines that were homozygous for Pro64 galectin‐3 were found to be sensitive to TRAIL, but 2 of 2 homozygous His64 cell lines and 1 of 2 heterozygous His64 cell lines were sensitive to TRAIL. Forced expression of galectin‐3 of defined genotype in galectin‐3 null cells was used to more directly test the effect of the Pro64His mutation on TRAIL sensitivity. High levels of expression of His64 galectin‐3 rendered BT549 cells sensitive to TRAIL and resistant to doxorubicin, but cells expressing Pro64 galectin‐3 remained resistant to TRAIL and sensitive to doxorubicin.CONCLUSIONS:The results of the current study indicate that the naturally occurring Pro64His mutation in galectin‐3 increases sensitivity to death receptor‐mediated apoptosis. This finding could be relevant to disparities in breast cancer outcomes across population groups, and could guide the design of future clinical trials of TRAIL‐based therapies. Cancer 2011;. © 2011 American Cancer Society.
The Rotational Spectrum of Diethyl Ketone
Authors: Nguyen Ha Vinh Lam , Stahl Wolfgang 
Published: March 2011

AbstractWe report on the rotational spectrum of diethyl ketone, C2H5‐C(O)‐C2H5, as observed by Fourier transform microwave spectroscopy under pulsed molecular beam conditions. Almost all lines were split into narrow quartets in a range from 10 kHz up to 2 MHz, arising from the hindered rotation of the two equivalent terminal methyl groups. In a global analysis using the xiam code, which is based on the rho axis method, three rotational constants, five quartic centrifugal distortion constants, the torsional barrier of the terminal methyl groups, and the angles between the principal inertial axes and the internal rotor axes were determined. The methyl torsional barrier was found to be 771.93(27) cm−1. In total, 199 lines were fitted to a standard deviation of 3.5 kHz. The experimental work was supplemented by quantum chemical calculations. Two‐dimensional potential energy surfaces describing the rotation of both ethyl groups against the CO frame were calculated with the MP2 method as well as the DFT method using the 6‐311++G(d,p) basis set and the B3LYP functional, respectively. Combining the experimental and theoretical results, an effective structure with C2v symmetry was deduced for the diethyl ketone molecule. Moreover, the torsional barrier of the methyl groups was determined by ab initio methods.
Understanding the Influence of Guest–Host Interactions on the Conformation of Short Peptides in a Hydrophobic Cavity: A Computational Study
Authors: Hua Weijie , Xu Lina , Luo Yi , Li Shuhua 
Published: March 2011

AbstractWe performed a computational investigation to understand the conformational preferences of four short peptides in a self‐assembled cage based on the experimental work by Y. Hatakeyama et al. (Angew. Chem. Int. Ed. 2009, 48, 8695). For this purpose, we combined molecular dynamics simulations, Monte Carlo simulations, and quantum mechanical calculations to obtain energies and structures for several low‐lying conformers of four peptides and the corresponding peptide‐cage inclusion complexes. Our calculations at both B3LYP and MP2 levels show that for each peptide, the corresponding conformation within the host (as revealed by the crystal structure) does not represent the lowest‐energy conformation of this peptide in vacuum. By comparing some low‐lying conformers in vacuum and in the cavity (for the same peptide), we found that the cage has a significant influence on the conformational propensities of peptides. First, one carbonyl oxygen of each peptide tends to bind to one Zn (II) atom of the cage, forming a ZnO bond. The formation of this bond leads to significant charge transfer from the cage to the peptide. Second, this ZnO bond causes the peptide to go through some local conformational changes. For larger peptides, such as penta‐ and hexapeptides, our calculations also show that some of their conformers must undergo significant structural changes, due to the confinement of the host. This computational study reveals the noticeable influence of the guest–host interaction on the conformational preferences of short peptides.