bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation and characteristics of a dummy molecularly imprinted polymer for phenol
Authors: Huang Yunhong , Xu Yang , He Qinghua , Du Bibai , Cao Yusheng 
Published: September 2012

AbstractA dummy molecularly imprinted polymers (DMIP) for phenol was synthesized by a thermal polymerization method with acrylamide as the functional monomer, ethylene dimethacrylate as the crosslinker, 2,2‐azobisisobutyronitrile as the free‐radical initiator, acetonitrile as the porogenic solvent, and sulfadiazine, a phenol analogue, as the template. In comparison to other adsorbents, the synthesized DMIP showed a higher capacity and rate of adsorption. The adsorption amount of the DMIP adsorbents for phenol reached 6.09 ± 0.15 mg/g, and the adsorption rate of the DMIP was about 0.406 ± 0.01 mg g−1·min−1. The results indicate that the Freundlich model fit the adsorption model of DMIP for phenol. The adsorption model of DMIP for phenol was multilayer adsorption. This showed that the DMIP synthesized by bulk polymerization could be used as a novel adsorbent for the removal of phenol from contaminated water. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Synthesis of biomimetic hyperbranched zwitterionic polymers as targeting drug delivery carriers
Authors: Wang Xiaohong , Sun Xinke , Jiang Guohua , Wang Rijing , Hu Ruanbing , Xi Xiaoguang , Zhou Yang , Wang Sheng , Wang Tao 
Published: September 2012

AbstractNovel biomimetic hyperbranched copolymers that synthesized by polymerization of zwitterionic monomer (CBB) on the surface of a hyperbranched poly(3‐ethyl‐3‐(hydroxymethyl)oxetane) (HBPO) core and used as a drug delivery carrier have been investigated by analysis of protein‐adsorption‐resistance, cytotoxicity and cell type‐specific targeting properties. The as‐synthesized biomimetic hyperbranched copolymers showed low toxicity, favorable protein resistant properties and were ultrastable in 100% fetal bovine serum. Folic acid and rodiamin‐B were conjugated to the surface of synthesized micelles to endow it with target drug delivery and fluorescence activity, respectively. Intracellular uptake and in vitro cytotoxicity of HBPO‐poly(carboxybetaine) micelles were investigated. Doxorubicin was used as a model drug for Hela cells during the experiment. All results show that the biomimetic hyperbranched copolymer is a candidate carrier for target drug delivery. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Influence of polymeric flame retardants based on phosphorus‐containing polyesters on morphology and material characteristics of poly(butylene terephthalate)
Authors: Köppl Thomas , Brehme Sven , Pospiech Doris , Fischer Oliver , Wolff‐Fabris Felipe , Altstädt Volker , Schartel Bernhard , Döring Manfred 
Published: September 2012

AbstractFlame retarded poly(butylene terephthalate) (PBT) is required for electronic applications and is mostly achieved by low molar mass additives so far. Three phosphorus‐containing polyesters are suggested as halogen‐free and polymeric flame retardants for PBT. Flame retardancy was achieved according to cone calorimeter experiments showing that the peak heat release rate and total heat evolved were reduced because of flame inhibition and condensed‐phase activity. The presented polymers containing derivatives of 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide form immiscible blend systems with PBT. Shear‐rheology shows an increase in storage moduli at low frequencies. This is proposed as quantitative measure for the degree of phase interaction. The phase structure of the blends depends on the chemical structure of the phosphorus polyester and was quite different, depending also on the viscosity ratio between matrix and second phase. A lower viscosity ratio leads to two types of phases with spherical and additionally continuous droplets. Addition of the flame retardants showed no influence on the dielectric properties but on the mechanical behavior. The polymeric flame retardants significantly diminish the impact strength because of several reasons: (1) high brittleness of the phosphorus polyesters themselves, (2) thermodynamic immiscibility, and (3) weak phase adhesion. By adding a copolymer consisting of the two base polymers to the blend, an improvement of impact strength was obtained. The copolymer particularly acts as compatibilizer between the phases and therefore leads to a smaller phase size and to a stronger phase adhesion due to the formation of fibrils. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Uptake of hazardous heavy metal ions by aqueous solution of poly(acrylamide) prepared through atom transfer radical polymerization process
Authors: Mishra Vivek , Kumar Rajesh 
Published: September 2012

AbstractPoly(acrylamide) (PACM) used in this study was prepared through an effective atom transfer radical polymerization process and characterized by NMR, FTIR, and thermo gravimetric analysis. Resulting polymer was used for the uptake of heavy metal ions from aqueous solution. Partition coefficient, retention capacity, and metal ion uptake behavior in aqueous solution of PACM at different monomer percent conversions and effect of parameters for optimization of polymerization reaction gives thermally stable PACM. Efficiency of metal ion uptake of different molecular weights of PACM were tested in batches for Ni2+, Pb2+, Cu2+, Zn2+, and Hg2+ ions in single metal solution. Metal ion sorption capacities increase with increase in polymer concentration. Metal ion sorption capacities in single metal system were 6.3 mg g−1 Ni2+, 6.0 mg g−1 Pb2+, 6.9 mg g−1 Cu2+, 6.2 mg g−1 Zn2+, 22.4 mg g−1 Hg2+ for PACM of 88% conversion (Mn = 19,850). Uptake by the PACM indicates that they are effective in removing metal ions from single metal ion solutions. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
In situ chemically crosslinked chitosan membrane by adipic acid
Authors: Cai Mengtan , Gong Jiang , Cao Jun , Chen Yuanwei , Luo Xianglin 
Published: September 2012

AbstractAdipic acid, which is nontoxic, was used to dissolve chitosan. The chitosan/adipic acid solution was used to prepare chitosan membrane. After being heated at 80–100°C, the membrane was in situ chemically crosslinked by adipic acid, as verified by Fourier transform infrared and wide‐angle X‐ray diffractometer analysis. The crosslinked membrane did not collapse even without treatment in alkaline solution. In addition, the in situ crosslinking reaction was studied. The crosslinking degree (CLD) was quantitatively calculated based on the mass of water produced. The results showed that CLD was positively related to both heating temperature and time. Results of kinetic of crosslinking reaction suggested that the amidation was in agreement with the first‐order rate equation and that the temperature effect could be described with the Arrhenius equation. The results of weight loss of chitosan membrane in phosphate‐buffered solution (pH = 7.4) indicated that the best water resistance of chitosan membrane was obtained at 90°C. In brief, a straightforward, nontoxic, environment‐friendly, and economical chemically crosslinking approach has been developed for chitosan materials. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Synthesis and characterization of novel ultrathin polyimide fibers via sol–gel process and electrospinning
Authors: Schramm Christian , Rinderer Beate , Tessadri Richard 
Published: September 2012

AbstractUltrathin polyimide fibers were prepared using the organoalkoxysilanes (3‐triethoxysilylpropyl)succinic anhydride (TESP‐SA) and (3‐amino)propyl triethoxysilane (APTES). In the first step, a viscous solution of the corresponding poly(amic) acid (PAA) was produced and electrospun at various high voltages. The fiber diameter distributions of the as‐prepared fibers were measured. The thermal imidization at 220°C resulted in the formation of an organic–inorganic hybrid polyimide fiber assembly as shown by FTIR/ATR. Surface morphology was investigated by means of SEM images. TGA measurements made evident that the prepared fibers begin to decompose at 380°C. XRPD pattern of the fibers revealed that a certain ladder‐like order exists in the fibers. The water vapor absorption of the thermally (220°C) treated ultrathin polyimide fibers was evaluated. The fiber assemblies treated at 110°C were water soluble, whereas those treated at 220°C were insoluble in water and organic solvents. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Closed‐Loop Identification for Control of Linear Parameter Varying Systems
Authors: Bendtsen Jan , Trangbaek Klaus 
Published: September 2012

AbstractThis paper deals with system identification for control of linear parameter varying systems. In practical applications, it is often important to be able to identify small plant changes in an incremental manner without shutting down the system and/or disconnecting the controller; unfortunately, closed‐loop system identification is more difficult than open‐loop identification. In this paper we prove that the so‐called Hansen scheme, a technique known from linear time‐invariant systems theory for transforming closed‐loop system identification problems into open‐loop‐like problems, can be extended to accommodate linear parameter varying systems as well. We investigate the identified subsystem's parameter dependency and observe that, under mild assumptions, the identified subsystem is affine in the parameter vector. Various identification methods are compared in direct and Hansen Scheme setups in simulation studies, and the application of the Hansen Scheme is seen to improve the identification performance.
Magnesium methoxide‐induced chemiluminescent decomposition of bicyclic dioxetanes bearing a 2′‐alkoxy‐2‐hydroxy‐1,1′‐binaphthyl‐7‐yl moiety
Authors: Kawashima Hidehisa , Watanabe Nobuko , Ijuin Hisako K. , Matsumoto Masakatsu 
Published: September 2012

ABSTRACTBicyclic dioxetanes 2a–c bearing a 2′‐alkoxy‐2‐hydroxy‐1,1′‐binaphthyl‐7‐yl moiety were effectively synthesized and their base‐induced chemiluminescent decomposition was investigated by the use of alkaline metal (Na+ and K+) or Mg2+ alkoxide in MeOH. When 2a–c were treated with tetrabutylammonium fluoride (TBAF) in dimethyl sulfoxide (DMSO) as a reference system, they showed chemiluminescence as a flash of orange light (maximum wavelength λmaxCL = 573–577 nm) with efficiency ΦCL = 6–8 × 10–2. On the other hand, for an alkaline metal (Na+ or K+) alkoxide/MeOH system, 2a–c decomposed slowly to emit a glow of chemiluminescence, the spectra of which were shifted slightly toward red from the TBAF/DMSO system, and ΦCL (= 1.4–2.3 × 10–3) was considerably decreased. In addition, Mg(OMe)2 was found to play a characteristic role as a base for the chemiluminescent decomposition of 2a–c through coordination to the intermediary oxidoaryl‐substituted dioxetanes 13. Thus, Mg2+ increased ΦCL to more than twice those with Na+ or K+, while it shifted λmaxCL considerably toward blue (λmaxCL = 550–566 nm). Copyright © 2012 John Wiley & Sons, Ltd.
Randomized clinical trial on the influence of anaesthesia protocol on intestinal motility during laparoscopic surgery requiring small bowel anastomosis
Authors: De Corte W , Delrue H , Vanfleteren L J J , Dutré P E M , Pottel H , Devriendt D K J C , Van Rooy F H E C , D'Hondt M , Carlier S , Desmet M B 
Published: September 2012

Abstract

Background
Hyperperistalsis of the small bowel during laparoscopic surgery may cause mucosal prolapse and reduce exposure, making laparoscopic suturing or stapling more demanding for the surgeon. Although it is commonly accepted that both opioids and volatile anaesthetics induce intestinal paralysis, intestinal hyperactivity during anaesthesia is not uncommon. This randomized trial investigated the effect of different volatile anaesthetics on intestinal motility and the impact on surgeon satisfaction.

Methods
Patients scheduled for laparoscopic gastric bypass surgery were randomized to receive sevoflurane or desflurane in a balanced anaesthetic regimen. After surgical exposure peristaltic waves were counted over 1 min in a segment of the jejunum. Following evaluation of intestinal motility, N-butylhyoscine, an antimuscarinic anticholinergic agent that relaxes bowel smooth muscle cells, could be administered if the surgeon judged the intestinal motility as disturbing. The endpoints were number of peristaltic waves and incidence of N-butylhyoscine administration, a surrogate for surgeon satisfaction.

Results
Twenty-two patients were randomized to each group. The groups were similar in age, sex and body mass index. There was a statistically significant difference in intestinal motility between the desflurane and sevoflurane groups: median (range) 7 (0–12) versus 1 (0–10) waves counted over 1 min respectively (P &lt; 0·001). A higher proportion of patients in the desflurane group received N-butylhyoscine (10 of 22 versus 1 of 22 in the sevoflurane group; P = 0·004).

Conclusion
Desflurane increased intestinal motility and decreased surgeon satisfaction compared with sevoflurane during laparoscopic gastric bypass surgery. A sevoflurane-based anaesthetic protocol can help to avoid disturbing hyperperistalsis. Registration number: B39620097060 (http://www.clinicaltrials.be).
Anatomic study of the superior glenoid labrum
Authors: Bain Gregory I. , Galley Ian J. , Singh Charanjeet , Carter Chris , Eng Kevin 
Published: September 2012

AbstractThe purpose of the study was to describe the normal anatomy of the glenoid labrum to help identification of pathology and guide surgical repair. Twenty dry bone scapulae and 19 cadaveric shoulders were examined. Light microscopy was performed on 12 radial slices through the glenoid. An external capsular circumferential ridge, 7–8 mm medial to the glenoid rim marks the attachment of the capsule. A separate internal labral circumferential ridge 4 mm central to the glenoid rim marks the interface between the labrum and articular cartilage. A superior–posterior facet was found consistently on the glenoid. Two thirds of the long head of biceps arises from the supraglenoid tubercle, 6.6 mm from the glenoid face, the remainder from the labrum. The superior labrum is concave and is loosely attached to the articular cartilage and glenoid rim. Clefts and foramens are common superiorly. In contrast the anterior–inferior labrum is convex, attaches 4 mm central to the glenoid rim and has a strong attachment to articular cartilage and bone. Sublabral clefts, recesses, and holes are common, but only in the superior–anterior labrum. Lesions in other regions of the labrum are potentially pathological. A complex superior labrum tear that extends to involve the biceps anchor, should have the biceps anchor repaired to the supraglenoid tubercle (mean 6.6 mm off the glenoid face) and the labrum be repaired to the glenoid rim. The anteroinferior labrum should be repaired 4 mm onto the glenoid face. This study will aid in identifying pathological labral lesions and guide anatomic repairs. Clin. Anat., 2013. © 2012 Wiley Periodicals, Inc.
Why the Father Wound Matters: Consequences for Male Mental Health and the Father‐Son Relationship
Authors: Miller Eric D. 
Published: September 2012

Adult men often report a sense of feeling a father wound when reflecting on their own father‐son relationship. Perhaps in part due to a rejection of traditional fathering practices that may have contributed to such wounds, fathers today are increasingly adopting a ‘new involved father’ role that is more welcoming of emotional expression and involvement in a child's life. This paper argues that adopting this new role may allow men to not only connect with their sons, but also to come to terms with problematic aspects of their own father‐son relationship. In this way, fathering a son may allow men to alter aspects of their self. Limitations and future directions for the father wound construct are also discussed. Copyright © 2012 John Wiley & Sons, Ltd.‘A ‘new involved father’ role that is more welcoming of emotional expression and involvement in a child's life’Key Practitioner MessageThis papers offers a critical review and analysis of the father wound concept and its larger clinical and social developmental significance for males.Traditionally, many adult men report a sense of loss or grief when considering their own father‐son relationship.Becoming a father, particularly to a son, may allow men to come to terms with earlier father‐son wounds to the betterment of these aforesaid fathers and their sons.
Localization of cytokinesis factors to the future cell division site by microtubule‐dependent transport
Authors: Atilgan Erdinc , Burgess David , Chang Fred 
Published: September 2012

AbstractThe mechanism by which spindle microtubules (MTs) determine the site of cell division in animal cells is still highly controversial. Putative cytokinesis “signals” have been proposed to be positioned by spindle MTs at equatorial cortical regions to increase cortical contractility and/or at polar regions to decrease contractility [Rappaport, 1986; von Dassow, 2009]. Given the relative paucity of MTs at the future division site, it has not been clear how MTs localize cytokinesis factors there. Here, we test cytokinesis models using computational and experimental approaches. We present a simple lattice‐based model in which signal‐kinesin complexes move by transient plus‐end directed movements on MTs interspersed with occasions of uniform diffusion in the cytoplasm. In simulations, complexes distribute themselves initially at the spindle midzone and then move on astral MTs to accumulate with time at the equatorial cortex. Simulations accurately predict cleavage patterns of cells with different geometries and MT arrangements and elucidate several experimental observations that have defied easy explanation by previous models. We verify this model with experiments on indented sea urchin zygotes showing that cells often divide perpendicular to the spindle at sites distinct from the indentations. These studies support an equatorial stimulation model and provide a simple mechanism explaining how cytokinesis factors localize to the future division site. © 2012 Wiley Periodicals, Inc
Analytical synthesis of odd/even‐nth‐order elliptic Cauer filter structures using OTRAs
Authors: Chang Chun‐Ming , Swamy M. N. S. 
Published: September 2012

SUMMARYThe operational transresistance amplifier (OTRA), the dual of the well‐known operational transconductance amplifier, is an attractive element for use in circuit design. One odd‐nth‐order and two even‐nth‐order OTRA‐R‐C or OTRA‐MOS‐C elliptic Cauer filter structures are presented using new analytical synthesis methods (ASMs). Because it is assumed in the synthesis procedure that the transresistance Rm → ∞, but in view of the fact that Rm is finite in practice, the more the number of OTRAs employed, the worse the precision of the output signals. By studying the sensitivity of the output to component variations, more precise output may be obtained by selecting one or two appropriate capacitance(s)/resistance(s) and adjusting their values suitably. H‐spice simulations are given to validate and demonstrate the theoretical predictions. Copyright © 2012 John Wiley & Sons, Ltd.
Social instability stress in adolescence increases anxiety and reduces social interactions in adulthood in male long–evans rats
Authors: Green Matthew R. , Barnes Brittany , McCormick Cheryl M. 
Published: September 2012

AbstractWe investigated the effects of social instability stress (daily 1‐hr isolation, change of cage partner, postnatal day 30–45) in adolescence in male rats on open field exploration and social behavior in adulthood. Social stressed rats had longer latencies to enter the center of an open field and then took longer to approach an object placed in the center of the field. When another rat was placed in the open field, stressed rats spent less time in social interaction than control rats, particularly when paired with another stressed, rather than a control, rat. The groups did not differ in social approach tests (when a stimulus rat was separated by wire mesh) nor in novel object exploration (when controlling for open field anxiety). The results suggest social stress in adolescence increases open field anxiety while maintaining exploratory behavior, and alters social interactions in adulthood. © 2012 Wiley Periodicals, Inc. Dev Psychobiol 55: 849–859, 2013.
Telomere length and LINE1 methylation is associated with chromosomal aberrations in peripheral blood
Authors: Li Huiqi , Hilmarsen Hilde Tveitan , Hossain Mohammad Bakhtiar , Björk Jonas , Hansteen Inger‐Lise , Albin Maria , Furu Skjelbred Camilla , Broberg Karin 
Published: September 2012

AbstractThe frequency of chromosomal aberrations in peripheral blood predicts a probable cancer risk. The individual telomere length and methylation of repetitive elements may be susceptibility factors for chromosomal aberrations. A cohort of healthy Norwegian men (N = 364) recruited during 1980–1999 were analyzed for chromosomal aberrations in phytohemagglutinin‐stimulated lymphocytes from peripheral blood. Chromosome‐type or chromatid‐type aberrations were scored. DNA was extracted from slides cytogenetically analyzed and relative average telomere length and methylation of LINE1 repeats were determined by quantitative polymerase chain reaction and bisulfite pyrosequencing, respectively. Information about individuals with malignant tumors (N = 49) diagnosed after chromosomal aberrations testing until end of 2008 was obtained and two matched controls per case were used in a nested case–control analysis. Shorter relative telomere length and higher methylation of LINE1 were associated with higher frequency of total chromosomal aberrations (β = −0.76, P = 0.022; and β = 0.042, P = 0.048, respectively; age‐adjusted ordinal regression). The telomere length was stronger associated with chromosome‐type (β = −1.00, P = 0.006) than with chromatid‐type aberrations (β = −0.49, P = 0.115). The LINE1 methylation was stronger associated with chromatid‐type (β = 0.062, P = 0.003) than with chromosome‐type aberrations (β = 0.018, P = 0.41). Telomere length [individuals with short telomeres odds ratio (OR) = 0.87, 95% confidence interval (CI) 0.38–2.0], LINE1 (individuals with high methylation OR = 1.04, 95% CI 0.43–2.5) and chromosomal aberrations (individuals with high frequency OR = 1.6, 95% CI 0.63–3.9) at baseline did not predict cancer risk, but the conclusions were hampered by low statistical precision. The results suggest that shorter telomere length and higher LINE1 methylation in peripheral blood lymphocytes are predisposition factors for increased frequency of chromosomal aberrations. © 2012 Wiley Periodicals, Inc.