bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of cinnamate comonomers on the dental formulation properties
Authors: Buruiana Emil C. , Jitaru Florentina , Melinte Violeta , Buruiana Tinca 
Published: May 2012

AbstractThis study reports the synthesis and characterization of two urethane dimethacrylates containing poly(ethylene oxide) or poly(propylene oxide) segment and cinnamate pendant moieties to be formulated in dental resin composites. 1H NMR, 13C NMR, and Fourier transform infrared spectroscopies, gel permeation chromatography, electrospray ionization‐mass spectroscopy, and thermogravimetric measurements confirmed their structure, whereas the photopolymerization evolution of oligodimethacrylates relating to a low–molecular‐weight dicinnamate methacrylate under ultraviolet irradiation was investigated by photo‐differential scanning calorimeter, monitoring the degree of conversion (DC) and polymerization rate. The photopolymerization results reveal that the investigated derivatives display a good photoreactivity (DC: ∼ 70%) during the formation of crosslinked polymers, the DC depending especially on the sample viscosity. The polymerization shrinkage for several mixtures including the urethane oligocinnamates (20 wt %) and diglycidyl methacrylate of bisphenol A/triethyleneglycol dimethacrylate system in the absence of filler was determined, the obtained values being in the range of 6.1–8.2 vol %. For few cured specimens incorporating quartz filler (75 wt %), water sorption/solubility, contact angle, and mechanical parameters were measured to establish if such monomers could be of interest in dentistry. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Influence of filler content on physicomechanical and bonding properties of an experimental dental resin cement
Authors: Xiong Jie , Sun Xiang , Chen Jihua , Tang Lihui 
Published: May 2012

AbstractTo investigate the effects of filler contents on the bonding and physicomechanical properties of experimental dental resin cements and the correlation between them, four groups were formulated with silicon dioxide filler in the following weight percentages: A: 40%, B: 50%, C: 60%, and D: 70%. LuxaCore dental resin cement was used as group E for commercial reference. For testing bond strength, resin cements were applied to the prefabricated dental fiber posts in the artificial teeth canal and photo cured, and then the microtensile bonding strength (BS) between posts and resin cement was measured in sticks of 1 × 1 mm2. For the mechanical properties, flexural strength (FS), diametral tensile strength (DTS), compressive strength (CS), and hardness (H) were tested according to the related standard. Water sorption and solubility were also determined. The results showed both bonding and physicomechanical strengths of the experimental resin cements varied to different extents with filler addition. Positive correlations existed respectively between the filler content and some mechanical properties (rFS = 0.964, rCS = 0.967, and rH = 0.959), whereas no significant correlations were found between the filler content and the other strength values tested in this study (rDTS = 0.321, rBS = 0.014), neither were between bond strength and mechanical properties. The effect of filler content on mechanical properties was more influential and prominent compared to that on bond strength. It is partial to compare properties and to predict clinical behaviors of resin materials based on a single in vitro test, and comprehensive evaluation is necessary. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Enhanced adsorption of malachite green onto carbon nanotube/polyaniline composites
Authors: Zeng You , Zhao Lijia , Wu Wendong , Lu Guixia , Xu Feng , Tong Yu , Liu Wenbin , Du Jinhong 
Published: May 2012

AbstractTo enhance adsorption of organic dyes like malachite green (MG) onto polymeric absorbents, we prepared carbon nanotube (CNT) filled polyaniline (PANI) composites with large surface areas by simply using entangled CNTs as porous frameworks during PANI polymerization. Adsorption behavior of the CNT/PANI composites in MG solutions was experimentally investigated and theoretically analyzed. The CNT/PANI composites exhibit much higher equilibrium adsorption capacity of 13.95 mg g−1 at an initial MG concentration of 16 mg L−1, increasing by 15% than the neat PANI, which is mainly attributed to large surface areas and strong CNT‐PANI interactions of the composites. In addition, theoretical analyses indicate that the adsorption kinetics and the isothermal process of the composites can be well explained by using the Ho pseudosecond‐order model and the Langmuir model, respectively. In light of their high MG adsorption and easy operation, the CNT/PANI composites have great potential as high‐efficiency adsorbents for removal of dyes from wastewater. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Synthesis and photo‐polymerization of bio‐based furanic compounds functionalized by 2‐hydroxypropyl methacrylate group(s)
Authors: Jeong Jaewon , Kim Bora , Shin Seunghan , Kim Baekjin , Lee Jae‐Soung , Lee Sang‐Hyeup , Cho Jin Ku 
Published: May 2012

AbstractBio‐based compounds (FmHPM and FdHPM) with a furan backbone and photo‐polymerizable 2‐hydroxypropyl methacrylate (HPM) group(s) were synthesized from carbohydrate‐derived furanyl alcohols (furan‐2‐methanol and furan‐2,5‐dimethanol) and their photo‐polymerizing behaviors and mechanical properties after photo‐polymerization were investigated. Half time values (t1/2) of bio‐based FmHPM and FdHPM were 10.4 s and 3.0 s and their shrinkage ratios were 3.0 and 6.1% during photo‐polymerization, respectively. Tensile‐shear strength of glass and polycarbonate joints bonded by bio‐based furanic compounds appeared in range of 0.2–0.6 MPa and pencil hardness of film coated by bio‐based furanic compounds after photo‐polymerization showed 2H–3H. Newly synthesized bio‐based furanic compounds allowed the feasibility to alternate petroleum‐based Bis‐GMA/TEGDMA, photo‐polymerizable composition widely utilized in a variety of applications. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Phospholipid nanodisc engineering for drug delivery systems
Authors: Murakami Tatsuya 
Published: May 2012

AbstractBiocompatible mesoscale nanoparticles (5–100 nm in diameter) are attractive tools for drug delivery. Among them are several types of liposomes and polymer micelles already in clinical trial or use. Generally, biocompatibility of such particles is achieved by coating them with polyethylene glycol (PEG). Without PEG coating, particles are quickly trapped in the reticuloendothelial system when intravenously administered. However, recent studies have revealed several potential problems with PEG coating, including antigenicity and restriction of cellular uptake. This has motivated the development of alternative drug and gene delivery vehicles, including chemically and genetically engineered high‐density lipoprotein (HDL)‐like nanodiscs or “bicelles”. HDL is a naturally occurring mesoscale nanoparticle that normally ferries cholesterol around in the body. Its initial “nascent” form is thought to be a simple 10 nm disc of phospholipids in a bilayer, and can be easily synthesized in vitro by mixing recombinant apoA‐I proteins with various phospholipids. In this review, the use of synthetic HDL‐like phospholipid nanodiscs as biocompatible drug carriers is summarized, focussing on manufacturing, size‐control, drug loading and cell targeting.
Environmental Strategies, Upgrading and Competitive Advantage in Global Value Chains
Authors: Marchi Valentina De , Maria Eleonora Di , Micelli Stefano 
Published: May 2012

ABSTRACTThe literature is increasingly focusing on how firms are improving their environmental performances and promoting green strategies to transform environmental constraints into new drivers of competitive advantage. This paper contributes to the literature by expanding knowledge about environmental management at the value chain level by exploring the concept of environmental upgrading and its implications in terms of economic upgrading and greening of industries. Leveraging on the global value chain and environmental managerial literature, the paper develops an integrated theoretical framework to analyse environmental upgrading trajectories and their implications in terms of firms' green strategies based on case studies in the Italian home‐furnishing industry. Empirical evidence suggests that firms develop green strategies to reduce environmental impacts while achieving economic benefits and competitiveness, which may be internal to the firm but also apply to value chains, with different implications in terms of bargaining power and value appropriation. Copyright © 2012 John Wiley & Sons, Ltd and ERP Environment.
Culpability Attributions towards Juvenile Female Prostitutes
Authors: Menaker Tasha A. , Miller Audrey K. 
Published: May 2012

This study addresses a gap in the research literature concerning predictors of culpability attributions towards juvenile female prostitutes (JFPs). Three hundred undergraduate participants read a vignette describing a JFP and responded to a series of measures. Results supported a causal pathway whereby stronger perceiver sexism predicted stronger negative affective evaluations of, and weaker empathic reactions toward, the JFP. Stronger negative affective evaluations and weaker empathic reactions, in turn, predicted stronger culpability attributions toward the JFP. Also, participants who were provided information about the JFP's extensive victimisation history and coercion into the trade, relative to participants who were not provided this information, attributed lesser culpability to the JFP. Finally, stronger culpability attributions toward the JFP related to weaker recommendations of restorative justice (i.e. counselling/mental health services for the JFP) and stronger recommendations of retributive justice (i.e. incarceration for the JFP). Study implications, limitations, and directions for future research are discussed. Copyright © 2013 John Wiley & Sons, Ltd.‘Stronger negative affective evaluations and weaker empathic reactions, in turn, predicted stronger culpability attributions’
Key Practitioner MessageStronger perceiver sexism predicts stronger negative evaluations of, and weaker empathic reactions towards a juvenile female “prostitute.”Stronger negative evaluations of, and weaker empathic reactions towards a girl in the sex trade in turn predict stronger culpability attributions towards her.Provision of information about a prostituted youth's victimisation history and coercion into prostitution mitigates culpability attributions toward her.Public education that highlights juvenile prostitution as a form of child sexual exploitation may be critically important to minimising punitive social cognitions about survivors of the commercial sex trade.
Servicescapes: The role that place plays in stay‐at‐home mothers’ lives
Authors: Johnstone Micael‐Lee , Todd Sarah 
Published: May 2012

ABSTRACTOver the past decade, increasing attention has been paid to gender‐related consumption behaviour. However, a relative gap in our knowledge still exists when it comes to understanding the changes that occur as a result of motherhood and how this may influence their interactions in the retail environment. The purpose of this article is to explore stay‐at‐home mothers’ experiences in the servicescape to gain a better understanding of how they associate with servicescapes during this transitional period, how they use retail space to suit their needs, and how they use retail space to negotiate their role as a stay‐at‐home mother. Five stay‐at‐home mothers with children younger than 5 years were provided with disposable cameras and asked to photograph servicescapes that they visited regularly. Over a 1‐year period, they were interviewed several times, and photo‐elicitation techniques were used throughout the interviewing process. The results of this study suggest that when consumers undergo role or identity changes, certain places can be used to smooth this process. Not only can the retail environment be used as a coping mechanism for stay‐at‐home mothers, it can also be viewed as a “second place” as opposed to a “third place”, thus enabling isolated consumers to feel connected with the outside world. Last, this study highlights the temporal dimensions of place. Throughout one's lifetime, one will form attachments to and patronise different places, which will evolve and change as individuals, accordingly, take on different roles and identities. Copyright © 2012 John Wiley & Sons, Ltd.
Assessment of safety, accuracy, and human CD34+ cell retention after intramyocardial injections with a helical needle catheter in a porcine model
Authors: Kumar Arun , Haralampus Chris A. , Hughes Micah , Rouy Didier , Cresswell Nate , Braun Ryan , Turner David , Amrani David , Motlagh Delara , Schaer Gary L. 
Published: May 2012

ObjectivesAssess accuracy of Helix injections via fluoroscopic‐mapping and evaluate delivery safety.BackgroundPercutaneous intramyocardial‐delivery of agents must be safe and accurate; retention is also important. A delivery system (Helical Infusion/Morph Guide‐Catheter, Biocardia Inc) has been developed to improve maneuverability and stability of catheter‐needle‐myocardium intersection.MethodsAccuracy and safety: 12 swine underwent LV and coronary angiography via 8F sheath. Targeted delivery was assigned into LAD, LCX, or RCA. System was advanced into LV and 6 targeted intramyocardial dye injections (5 mm apart) delivered using fluoroscopy. After euthanization, hearts underwent gross and histologic evaluation. Retention was assessed by iron‐oxide and fluorochrome labeled CD34+ cells. Cells were injected into 6 swine using same techniques. Delivery system was advanced into LV, and injections delivered using fluoroscopy. Euthanization was performed at 2 hr and hearts formalin fixed. MRI was performed on 6 treated hearts and 4 untreated controls. Blinded analysis performed by 2 radiologists. Two treated hearts underwent immunohistological analysis.ResultsAccuracy and safety evaluation: 71/72 injections (98.6%) were within prespecified zone; 7/72 (9.7%) less than 5 mm apart. No adverse events occurred. MRI‐presence of iron‐oxide labeled CD34+ cells were correctly identified in 95% (19/20) of imaged injections. Anti‐CD34+ antibody staining and fluorescence microscopy confirmed CD34+ cells in myocardium. Histology confirmed cell viability at fixation.ConclusionsHelix system was accurate and safe. Retention of CD34+ cells was confirmed by MRI and immunohistology. Further preclinical studies are needed to characterize retention over time and quantify efficiency. Studies are needed to confirm accuracy, safety, and retention in humans. © 2012 Wiley Periodicals, Inc.
Safety of bivalirudin in percutaneous coronary intervention following thrombolytic therapy
Authors: Sardi Gabriel L. , Lindsay Joseph , Waksman Ron 
Published: May 2012

ObjectivesThis study was undertaken to evaluate the safety of bivalirudin (BIV) use during percutaneous coronary intervention (PCI), following thrombolytic therapy in patients with ST‐segment elevation myocardial infarction (STEMI).BackgroundBIV has emerged as a safer anticoagulant than unfractionated heparin (UFH) during primary PCI; however, its use in patients who receive thrombolytic therapy has not been established.MethodsA consecutive series of 104 patients who presented with STEMI treated with full‐dose thrombolytics and who subsequently received PCI within 6 hr was identified and analyzed. BIV use was compared with UFH for in‐hospital bleeding and ischemic events. The primary end points were the rate of major bleeding and the rate of net adverse clinical events as defined in the Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction trial. The study cohort consisted of 104 patients, of whom 47 (45%) received BIV and 57 (55%) received UFH.Time distribution of patients receiving intraprocedural bivalirudin (BIV) or unfractionated heparin (UFH) after thrombolytic therapy. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]imageResultsPatients on BIV were more frequently preloaded with clopidogrel, while intraprocedural glycoprotein IIb/IIIa inhibitors were used only in UFH patients. In‐hospital death, ischemic events, and thrombolysis in myocardial infarction major bleeding occurred more frequently in patients treated with UFH. The net adverse clinical events rate was lower in the intraprocedural BIV group (3 [6.4%] vs. 12 [21.1%] UFH, P = 0.034).ConclusionsThe use of BIV in patients presenting with STEMI who were pretreated with thrombolytic therapy and who subsequently underwent PCI is safe and is associated with less ischemic and bleeding events when compared with UFH, and should be considered as the first line anticoagulant for these patients during PCI. © 2012 Wiley Periodicals, Inc.
The Effectiveness and Safety of Triple‐Antiplatelet Treatment Based on Cilostazol for Patients Receiving Percutaneous Coronary Intervention: A Meta‐Analysis
Authors: Wang Ping , Zhou Shijie , Zhou Rui , Liu Gan , Tang Ping , He Jing , Ma Cong , He Yi , Yang Jinliang 
Published: May 2012

AbstractThe combination of cilostazol, aspirin, and clopidogrel (triple therapy) after percutaneous coronary intervention has been considered as an alternative therapy. We performed a meta‐analysis based on 8 randomized controlled trials with a total of 3332 patients to compare the effectiveness and safety of this triple therapy with traditional dual therapy (aspirin and clopidogrel). Our findings suggested that the triple therapy is more effective than dual therapy in preventing restenosis (odds ratio [OR]: 0.52, 95% confidence interval [CI]: 0.40–0.66, P < 0.00001), maintaining minimal lumen diameter (OR: 0.15, 95% CI: 0.10–0.20, P < 0.00001), and avoiding target‐vessel revascularization (OR: 0.62, 95% CI: 0.47–0.82, P = 0.001). There is also no significant difference in major adverse cardiac and cerebrovascular events between the 2 therapies, except the smaller occurrence rate of target‐lesion revascularization in the triple‐therapy group (OR: 0.42, 95% CI: 0.26–0.69, P = 0.0005). However, the triple therapy is associated with a higher level of adverse drug events, including rash (OR: 2.45, 95% CI: 1.41–4.23, P = 0.001), gastrointestinal disorders (OR: 2.59, 95% CI: 1.26–5.30, P = 0.009), and drug discontinuation (OR: 3.80, 95% CI: 1.59–9.10, P = 0.003), but it has no difference in bleeding compared with the dual therapy (OR: 1.05, 95% CI: 0.71–1.55, P = 0.80).Additional Supporting Information may be found in the online version of this article.Ping Wang, MS and Shijie Zhou, MS contributed equally to this article. The authors have no funding, financial relationships, or conflicts of interest to disclose.
Beta blocker use and colorectal cancer risk
Authors: Jansen Lina , Below Janina , Chang‐Claude Jenny , Brenner Hermann , Hoffmeister Michael 
Published: May 2012

AbstractBACKGROUND:Recently, it has been postulated that long‐term use of beta blockers might decrease the risk of certain types of cancer because of weakening of norepinephrine signaling. Previous studies on colorectal cancer (CRC) yielded inconsistent results, but lacked information on covariates. Thus, the authors investigated the association of beta blocker use and CRC risk in a large population‐based case‐control study (DACHS study).METHODS:Between 2003 and 2007, information on beta blocker use and potential confounders was collected by personal interviews for 1762 CRC cases and 1708 control individuals from Germany. The association of CRC risk and beta blocker use and subclasses of beta blockers was estimated by multiple logistic regression. In addition, site‐ and stage‐specific analyses were performed.RESULTS:After adjustment for covariates, no association was observed with beta blocker use (odds ratio [OR], 1.05; 95% confidence interval [CI], 0.86‐1.29) or with duration of beta blocker use. Also, the analysis by subclasses of beta blockers (cardioselectivity) and active ingredients (metoprolol, bisoprolol, carvedilol, and atenolol) or by CRC subsite showed no associations. In stage‐specific analyses, long‐term beta blocker use (6+ years) was associated with a significantly higher risk of stage IV CRC (OR, 2.02; 95% CI, 1.25‐3.27).CONCLUSIONS:Our adjusted results do not support the hypothesis that beta blocker use is associated with decreased risk of CRC. In contrast, we found a positive association of long‐term beta blocker use and risk of stage IV CRC. The latter result should be further evaluated in future studies. Cancer 2012.© 2012 American Cancer Society.
Age‐dependent differences in morphine‐induced taste aversions
Authors: Hurwitz Zachary E. , Merluzzi Andrew P. , Riley Anthony L. 
Published: May 2012

AbstractAdolescence is a developmental period of particular importance given the host of neurobiological changes that occur during this stage of development. Drug use and abuse is said to be a function of the balance of its rewarding and aversive effects, and any age‐dependent differences in morphine's aversive effects could impact drug intake. The present experiments examined the ability of morphine sulfate (0, 3.2, 10, and 18 mg/kg) to induce taste aversions in adolescent and adult rats under high (20‐min fluid access each day; Experiment 1A/B) and low (50% of ad libitum access; Experiment 2A/B) deprivation conditions. In both studies, adolescent and adult rats were given a novel saccharin solution to drink and were subsequently injected with morphine. Independent of the deprivation condition, adults acquired stronger aversions than adolescents and did so at a faster rate. On a subsequent two‐bottle aversion test, all morphine‐injected subjects drank a significantly lower percentage of saccharin than vehicle‐injected controls with adults exhibiting stronger aversions than adolescents. These age‐dependent differences in morphine‐induced CTAs extend the findings with other drugs of abuse for which adolescents exhibit weaker aversions. The possible basis for and implications of these differences were discussed. © 2012 Wiley Periodicals, Inc. Dev Psychobiol 55: 415–428, 2013