bluuebunny/crossref_metadata_2025_split huggingface dataset:
What makes a creative day? A diary study on the interplay between affect, job stressors, and job control
Authors: Binnewies Carmen , Wörnlein Sarah C. 
Published: December 2010

AbstractApplying a within‐person perspective to research on creativity at work, this diary study examined daily positive and negative affect (NA) in the morning as well as daily job stressors (time pressure and situational constraints) as predictors of daily creativity. In addition, the general level of job control was investigated as a cross‐level moderator in these relationships. Hypotheses were tested in a sample of 90 interior architects (N = 326 days) who completed a general survey and two daily surveys over the course of one work week. Hierarchical linear modeling showed that a higher level of positive affect (PA) in the morning as well as an intermediate level of daily time pressure was related to higher daily creativity. Job control moderated relations between daily NA, daily situational constraints and daily time pressure (curvilinear effect) with daily creativity. Our results stress the importance of daily affect and daily job stressors as well as the moderating role of job control for daily creativity at work. Copyright © 2010 John Wiley & Sons, Ltd.
p‐Phenylenediamine Epoxy Resin Film for Redox Enzyme Detection
Authors: Kanno Kenichi , Kugimiya Akimitsu , Matsumoto Yasumasa , Konishi Yuya , Arakawa Tsuyoshi , Takaki Yuichiro , Yoshida Yuya , Hanada Keiichiro , Matsumura Kotaro , Endo Takeshi 
Published: December 2010

AbstractSummary: Phenylenediamine derivatives (PDs) are environmentally hazardous, though very useful for chemical analysis. To minimize release into the environment, a PD‐containing epoxy resin film was developed that retained redox enzyme activity. p‐Phenylenediamine and 2,2‐bis(4‐glycidyloxyphenyl)‐propane were cured to produce a violet film. This film was reactive against peroxidase, a redox enzyme that oxidizes phenylenediamine to afford an imine. Enzymatic oxidation caused the film to change color from violet to deep green. The film exhibited fluorescence at 394 nm under excitation at 350 nm, and the fluorescent intensity decreased with greater oxidation. Thus, the film could be used to detect redox enzyme activity.
Thermosensitive Poly(N‐isopropylacrylamide)‐g ‐Polyamidoamine Dendrimer Derivatives: Preparation and the Drug Release Behaviors
Authors: Wang Zheng , Zhou Bo , Liu Dong , Fan Xiang‐pan 
Published: December 2010

AbstractSummary: A series of thermally responsive dendritic core‐shell polymers were prepared based upon dendritic polyamidoamine (PAMAM), modified with carboxyl end‐capped linear poly(N‐isopropylacrylamide) (PNIPAAm‐COOH) in different ratios via an esterification process to obtain PNIPAAm‐g‐PAMAM. The graft ratio of PNIPAAm could be adjusted by changing the feed ratio of PAMAM‐OH to PNIPAAm‐COOH and was verified by 1H NMR and gel penetration chromatography (GPC). The lower critical solution temperature (LCST) of PNIPAAm‐g‐PAMAM evaluated by UV‐vis spectrophotometer was about 32 °C. Indomethacin (IMC) as a model drug was loaded in the thermosensitive polymer‐grafted dendrimer derivative and its release behavior was studied below and above its LCST (27 °C vs 37 °C). Results showed that the LCST of PNIPAAm‐g‐PAMAM was around 32 °C compared with that of the pure PNIPAAm. The release behavior of the indomethacin entrapped in the internal cavities of the PNIPAAm‐g‐PAMAM showed that almost 77% of the drug was cumulatively released at 27 °C after 10 hours, whereas only 20% was released at 37 °C. The release rate of IMC from the IMC/PNIPAAm‐g‐PAMAM complex at 37 °C is significantly slower than that at 27 °C, which indicates that the PNIPAAm chains grafted on the surface of PAMAM dendrimer could act as a channel switching on‐off button through expending or contracting in response to the temperature variation and could control the drug release by varying the surrounding temperature.
Tunable Amphiphilic Poly(Ether‐Anhydride) Gel Nanoparticles for the Delivery of Hydrophobic Drugs
Authors: Wang Zheng , Cai Zheng , Guo Qian 
Published: December 2010

AbstractSummary: Biodegradable amphiphilic poly(ether‐anhydride) gel nanoparticles (GNPs) with a hydrophobic crosslinked core and a hydrophilic PEG shell have been prepared from amphiphilic photo‐crosslinkable ether‐anhydride macromers via microemulsion photo‐polymerization. The properties of the GNPs, such as degradability, size and drug‐loading capacity, were investigated by tailoring the length of PEG chains in macromers from 400 to 4000 and by the addition of a hydrophobic photo‐crosslinkable monomer: stearic monoacrylic anhydride (MSA). TEM showed that the GNPs were spherical in shape with a core‐shell structure when MSA was added. The GNPs were used as the carriers to enhance the solubility of hydrophobic drugs. Indomethacin (IND) as a model drug was entrapped in the hydrophobic crosslinked core by an in situ embedding method. Results showed that IND maintained chemically intact during the formulation process, and its dissolution rate were improved compared to those of the pure IND. The GNPs prepared from PEG macromer (molecular weight: 4000) with the addition of MSA exhibited the zero‐order release behavior, which is potentially useful to control the release of hydrophobic drugs.
Neutral and Charged Brushes Covalently Grafted from OH‐Functionalized Mica Surfaces using Surface‐Initiated ATRP – Swelling Investigation by AFM
Authors: Lego Béatrice , Skene W.G. , Giasson Suzanne 
Published: December 2010

AbstractPoly(acrylic acid) (PAA) and poly(tert‐butyl acrylate) (PBA) brushes of various grafting densities were prepared via surface‐initiated polymerization of tert‐butyl acrylate on mica. PAA was prepared by hydrolyzing the PBA brushes. The swelling behavior of PBA and PAA brushes was studied as a function of grafting density by AFM. The swelling of the polymer layer was found to be higher for PAA in water than for the PBA sample swollen with DFM.
Simulation of Itraconazole Encapsulation by Novel Biocampatible Dendritic Compounds
Authors: Elkin Igor , Hildgen Patrice 
Published: December 2010

AbstractSummary: To enhance the dissolution rate of itraconazole, the novel macromolecular biocompatible dendritic compounds were selected. The possible drug encapsulation was evaluated by the calculated difference between potential energies of the individual dendrimers and structures having one itraconazole molecule near the dendrimer core. The structures with the decanediol spacers and with the core presented by 1,2,3,4‐butanetetracarboxylic acid demonstrated better energetic effects to be good candidates as a drug delivery carrier for itraconazole pharmaceutical applications. Additional simulations with the less bulky modeling structures with different cores, using molecular dynamic procedure, allowed us to obtain the best results with the tetracarboxy benzene core.
Polymers Grafted to Single‐walled Carbon Nanotubes by Radical Polymerization
Authors: Ford Warren T. 
Published: December 2010

AbstractSummary:Polymers have been grafted from single‐walled carbon nanotubes (SWCNT) by ATRP and grafted to SWCNT by use of ATRP and azide end groups and by in situ polymerization. The SWCNT/polymer products are soluble indefinitely in good solvents for the polymers. AFM images indicate that the SWCNT are present as individual or bundles of only a few nanotubes.
Synthesis of Non‐natural Xyloglucans by Polycondensation of 4,6‐Dimethoxy‐1,3,5‐triazin‐2‐yl Oligosaccharide Monomers Catalyzed by Endo‐β‐1,4‐glucanase
Authors: Tanaka Tomonari , Noguchi Masato , Ishihara Masaki , Kobayashi Atsushi , Shoda Shin‐ichiro 
Published: December 2010

AbstractSummary: A cellotetraose‐backboned hepta‐saccharide (XXXG) (a capital X represents a glucopyranose residue that is substituted with a xylopyranose through an α‐1,6 glycosidic bond, and a capital G represents a non‐substituted glucopyranose residue) and a nona‐saccharide (XLLG) (a capital L represents a glucopyranose residue that is substituted with a galactopyranoseβ(1‐2)xylopyranose through an α‐1,6 glycosidic bond) have directly been converted to the corresponding 4,6‐dimethoxy‐1,3,5‐triazin‐2‐yl derivatives (DMT‐β‐XXXG 1 and DMT‐β‐XLLG 2, respectively) by the action of 4‐(4,6‐dimethoxy‐1,3,5‐triazin‐2‐yl)‐4‐methyl morpholinium chloride (DMT‐MM). The selective nucleophilic attack of the anomeric hydroxyl group to DMT‐MM has been achieved in water without using any protection of the hydroxyl groups. The resulting activated oligosaccharide derivatives (1 and 2) were found to polymerize catalyzed by an endo‐β‐1,4‐glucanase as catalyst. The polymerization took place in a complete regio‐ and stereo‐selective manner, affording non‐natural polysaccharides having a XXXG‐repeating unit and a XLLG‐repeating unit, respectively, in the main chain. It is extremely difficult to construct such definite repeating structures via the conventional synthetic routes including protection‐deprotection procedures.
Chelating Ligands Tethered to Carbon Nanotubes
Authors: Howell Bob A. , Dumitrascu Adina 
Published: December 2010

AbstractSummary: Carbon nanotubes offer an inert platform on which various species may be supported. A range of applications have been addressed using this approach. Anchoring sites on the nanotubes are usually groups introduced via an oxidative procedure. These groups provide convenient reactive functionality that can be accessed in a variety of ways. In this case, carboxyl functionality have been utilized to attach, through a linker, a good coordinating ligands, 1‐10‐phenanthroline. In the first instance, 1,10‐phenanthroline was converted to the 5,6‐epoxide by treatment with hypochlorite. The epoxide was opened in sulfuric acid to generate the 5‐hydroxy compound. This, in turn, was treated with ethylene oxide in the presence of a base to provide the alkoxylated compound. The alcohol terminus, as the alkoxide, was used to couple the nanotubes by displacement of tosyl anion from the methylol ester. The carboxyl groups at the nanotubes surface were reduced to the corresponding alcohol and treated with p‐toluenesulfonyl chloride in the presence of pyridine to generate the tosylate used for coupling. In a second approach the carboxyl groups were converted to the corresponding acid chloride which was treated with alkoxylated phenanthroline to achieve coupling via an ester linkage.
Synthesis, Characterization and Bactericidal Properties of Poly(N‐vinyl‐2‐pyrrolidone‐co‐Maleic anhydride‐co‐N‐Isopropyl acrylamide)
Authors: Talu Muzaffer , Uzluk Elif , Yüksel Betül 
Published: December 2010

AbstractSummary: Radical‐initiated terpolymerization of maleic anhydride (MA), N‐vinyl‐2‐pyrrolidone (NVP) with N‐isopyropyl acrylamide (NIPA) has been prepared as a way to obtain new water‐soluble polymers. Structure, composition and thermal behaviour of synthesized terpolymers were determined by FTIR, UV‐vis, 1H NMR spectroscopy, elemental analysis (N content), differential scanning calorimetry, thermogravimetric and differential thermal analysis, gel permeation chromatography analysis (GPC), scanning electron microscopy (SEM) and X‐ray diffraction analysis (XRD). The terpolymer composition‐structure‐property relationship indicates that the semicrystalline structure of terpolymers with different reaction times, degrees of crystallinity, and thermal behaviour depends on the content of carboxyl and amide‐containing monomer linkage. The antimicrobial activities the terpolymers were evaluated against pathogen bacteria: Staphylococcus aureus, Salmonella enteridis, Streptococcucs faecalis, Eschericia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa. The antimicrobial activity was explored by the well‐diffusion technique. All the studied polymers, containing biologically active moieties in the form of ionized cyclic amide and carboxylic acid groups, were more effective against Gram‐positive than Gram‐negative bacteria. The bactericidal effect of terpolymers against Gram negative bacteria increased with the increasing reaction times.
Micellar Solubilization and In Vitro Release of Silymarin in the self‐Aggregates of an Amphiphilic Derivative of Chitosan
Authors: Sui Weiping , Yin Changqing , Kong Xiangzheng 
Published: December 2010

AbstractSummary: The amphiphilic derivatives of chitosan, (2‐hydroxyl‐3‐butoxyl)‐propylcarboxymethyl‐chitosan (HBP‐CMCHS), can form micelles with the inner core of hydrophobic segments and the outer shell of hydrophilic segments. The typical poor water‐soluble drug silymarin was solubilized in the HBP‐CMCHS micellar by physical entrapped method. Results showed that the solubilizing capacity was enhanced by increasing the concentration of HBP‐CMCHS with the same dosage of silymarin. Silymarin‐loaded micellar system of HBP‐CMCHS was characterized by TEM and DLS. TEM photograph revealed that the micelles were spherical and silymarin was solubilized in the cores of the spherical polymeric micelles. DLS showed that after solubilization the size of the micelles became bigger. In vitro tests showed that silymarin was slowly released from micellar solution and the release lasted up to 40 h by means of the dialysis method.
Fracture Behavior of Covalently Re‐Modified MWNT/Epoxy Nanocomposites
Authors: Kaffashi Babak , Kaveh Amir 
Published: December 2010

AbstractSummary: In this work, a surface re‐modified multi‐walled carbon nanotube (MWNT) was prepared by the chemical attachment of oligomeric unsaturated polyester on the MWNT surface. The re‐modified MWNT was incorporated in two concentrations of 0.35 and 0.70 Wt.% into epoxy resin in order to investigate its effect on morphology and mechanical behavior of the MWNT/epoxy nanocomposite. The transmission electron microscopy showed that the re‐modification of MWNT surface improves its dispersion state in the epoxy matrix. The tensile measurements for the nanocomposite having different amounts of surface re‐modified/not‐modified MWNT showed that the fracture mechanism changed from brittle to tough beyond a certain amount of surface re‐modified MWNT. The scanning electron microscopy findings on the fracture surface morphology of the resulted nanocomposite substantiated the observed phenomena.
Chronic dietary intake of quercetin alleviates hepatic fat accumulation associated with consumption of a Western‐style diet in C57/BL6J mice
Authors: Kobori Masuko , Masumoto Saeko , Akimoto Yukari , Oike Hideaki 
Published: December 2010

AbstractScope: To determine the effect of consumption of a quercetin‐rich diet on obesity and dysregulated hepatic gene expression.Methods and results: C56BL/6J mice were fed for 20 wk on AIN93G (control) or a Western diet high in fat, cholesterol and sucrose, both with or without 0.05% quercetin. Triglyceride levels in plasma, thiobarbituric acid‐reactive substances (oxidative stress marker) and glutathione levels and peroxisome proliferator‐activated receptor α expression in livers of mice fed with the Western diet were all improved after 8 wk feeding with quercetin. After 20 wk, further reductions of visceral and liver fat accumulation and improved hyperglycemia, hyperinsulinemia, dyslipidemia and plasma adiponectin and TNFα levels in these mice fed with quercetin were observed. The expression of hepatic genes related to steatosis, such as peroxisome proliferator‐activated receptor γ and sterol regulatory element‐binding protein‐1c was also normalized by quercetin. In mice fed with the control diet, quercetin did not affect body weight but reduces the plasma TNFα and hepatic thiobarbituric acid‐reactive substance levels.Conclusion: In mice fed with a Western diet, chronic dietary intake of quercetin reduces liver fat accumulation and improves systemic parameters related to metabolic syndrome, probably mainly through decreasing oxidative stress and reducing PPARα expression, and the subsequent reduced expression in the liver of genes related to steatosis.
A new material classification of lossy metamaterials
Authors: Lee Dong Hyun , Park Wee Sang 
Published: December 2010

AbstractThe propagation constant is extended and derived for lossy metamaterials in which ε < 0 and μ > 0 (ENG), ε > 0 and μ < 0 (MNG), and ε < 0 and μ < 0 (DNG).Regardless of the magnitudes of ε and μ, DPS materials are a RH medium and DNG materials are a LH medium. However, SNG materials become a RH medium when the sign of (ε × μ + ε × μ) is positive and a LH medium when the sign is negative. A new diagram is proposed to classify any lossy metamaterial into either RH or LH medium. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:445–447, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25687
A novel highly sensitive optical fiber microphone based on single mode–multimode–single mode structure
Authors: Sun An , Semenova Yuliya , Farrell Gerald 
Published: December 2010

AbstractIn this article, a novel multimode interference based optical fiber microphone by employing single mode‐multimode‐single mode (SMS) structure is presented. The acoustic vibration is measured by detecting the transmission loss of the SMS structure that attached to a thick aluminum membrane. Experiments are carried on to test the performance of SMS structured fiber microphone, and the experimental results show that the SMS fiber sensor can effectively detect the acoustic signal within the audio range of 20 kHz. It also exhibits a high sensitivity and human voice can also be picked up effectively within the distance of 2 m. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:442–445, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25688
Internal dual‐antenna in the folder‐type mobile phone for DVB‐H and 3G applications
Authors: Zuo Shaoli , Yin Yingzeng , Zhang Zhiya , Ren Xueshi 
Published: December 2010

AbstractA dual‐antenna system that consists of a planar meander monopole antenna and a planar inverted‐F antenna (PIFA) in the folder‐type mobile phone is proposed. By using the planar monopole type radiating element constructed with meander strips, the monopole antenna provides a degree of miniaturization while retaining a wide impedance bandwidth of 740 MHz (440–1180 MHz) and 220 MHz (1710–1930 MHz) that covers DVB‐H/GSM/DCS within 3:1 VSWR; while by exciting dual‐resonant modes of 1/8 λ at 900 MHz and 1/4 λ at 1800 MHz, the PIFA with coupling feed shows dual impedance bandwidths of 142 MHz (858–1000 MHz) and 410 MHz (1790–2200 MHz) that covers GSM/PCS/3G(UMTS) within 3:1 VSWR. The approximately omnidirectional pattern, good gain, over the operating bands have also been obtained. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:306–310, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25695
Low‐profile Fabry–Pérot cavity antenna with a double‐layered partially reflecting surface structure
Authors: Ju J. , Kim D. , Lee W. , Choi J. 
Published: December 2010

AbstractA low‐profile Fabry–Pérot cavity antenna covered with a double‐layered partially reflecting surface is proposed to enhance the gain and reduce the height of the antenna.A ray theory is applied to predict the resonance frequency and cavity height of the proposed antenna. The proposed antenna is useful for designing a cavity antenna with a low profile and high gain. The maximum gain of the antenna is 13.88 dB, and its total height is smaller than λ/8 at an operating frequency of 2.46 GHz. The good agreement between the measured and predicted results ensures the validity of our design approaches. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:271–273, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25698
Forward–backward time‐stepping method combined with genetic algorithm applied to breast cancer detection
Authors: Moriyama Toshifumi , Meng Zhiqi , Takenaka Takashi 
Published: December 2010

AbstractA hybrid method of forward–backward time‐stepping algorithm and genetic algorithm is applied to microwave imaging for breast cancer detection.A two‐dimensional numerical breast phantom with high contrast between fat and fibroglandular tissues and low contrast between fibroglandular and tumor tissues is used to assess the efficacy of the proposed method. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:438–442, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25699
A six‐pole ultra‐narrowband high‐temperature super conducting filter at S‐band
Authors: Zhang Ying , Guo Xubo , Chen Wei , Lu Xinxiang , Zhang Xiaoping , Wei Bin , Cao Bisong 
Published: December 2010

AbstractThis article presents a six‐pole high‐temperature superconducting (HTS) filter with a fractional bandwidth (FBW) of 0.09% at 3.3 GHz. Twin‐spiral resonators with a high quality factor (Qu) of 69,000 are used in the design procedure. The measured results of the filter exhibit a low insertion loss of 0.62 dB and are in good agreement with the simulated ones. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:435–438, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25700
A novel compact bandstop filter using defected microstrip structure
Authors: La Dongsheng , Lu Yinghua , Sun Siyang , Liu Ning , Zhang Jingling 
Published: December 2010

AbstractIn this article, a new defected microstrip structure (DMS) which is used to design filter is introduced.Its resonant characteristics can be adjusted by changing the dimension of the structure unit. A novel bandstop filter is designed based on this structure. There are two transmission zeros located at about 4.08 GHz and 6.2 GHz, respectively. The measured results show a good agreement with the simulation. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:433–435, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25708
A uneven Doherty power amplifier using anticoupled power divider and composite right/left‐handed transmission lines
Authors: Zhao Shiwei , Tang Zongxi , Wu Yiwei , Bao Lifen 
Published: December 2010

AbstractA uneven Doherty power amplifier using anticoupled power divider and composite right/left‐handed transmission lines (CRLH‐TL) is proposed for efficiency and linearity improvement.Uneven power divider is achieved by anticoupled line divider and CRLH‐TL, the structure is used to deliver more input power to the peaking amplifier than the main amplifier. The CRLH‐TL with lead 90° phase shifter at the input of maim amplifier is designed to flexible variation of power division ratio and phase, besides, anticoupled power divider to suppress the second harmonic of front class input. The drain efficiency of 45.2 and 39.3% has been measured at the saturated output power of 43 dBm and 6‐dB back off, respectively. Furthermore, the third‐order intermodulation distortion performance and ACLR is improved as much as 5–6 dB when compared with conventional uneven Doherty amplifier. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:322–324, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25715
Compact tunable lumped‐element Wilkinson power divider with high isolation
Authors: Mung Steve W. Y. , Chan Wing Shing 
Published: December 2010

AbstractIn this letter, a compact tunable lumped‐element Wilkinson power divider is proposed.It is realized by the electronically tunable microwave impedance transformers controllable by varactor diodes. The proposed divider possesses a tunable frequency range over a bandwidth of 53% different from the conventional Wilkinson power divider. Experimental results show that it can operate over the tunable frequency range from 1.1 to 1.9 GHz with more than 50 dB isolation between the isolated ports. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:288–290, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25717