bluuebunny/crossref_metadata_2025_split huggingface dataset:
Relationship between the gas transport properties and the refractive index in high‐free‐volume fluorine‐containing polyimide membranes
Authors: Sato Shuichi , Ose Takamasa , Miyata Sou , Kanehashi Shinji , Ito Hiroto , Matsumoto Setsuko , Iwai Yuki , Matsumoto Hironaga , Nagai Kazukiyo 
Published: March 2011

AbstractThe refractive index and gas transport properties (i.e., permeability, diffusivity, and solubility) in the 2,2′‐bis(3,4‐dicarboxyphenyl) hexafluoropropane dianhydride (6FDA)‐based polyimides were systematically investigated in terms of their polymer fractional free volumes (FFVs). The permeability and diffusion coefficients of the 6FDA‐based polyimide membranes to hydrogen, oxygen, nitrogen, methane, and carbon dioxide were correlated with their FFVs, which were estimated with van Krevelen's group contribution method. Linear correlations were also observed between the gas transport properties and the refractive index of these polyimides. We described FFV as a function of the refractive index based on the Lorentz–Lorenz equation. Linear correlations were observed between their refractive‐index‐based FFVs and the gas permeability, diffusivity, and solubility coefficients of these 6FDA‐based polyimides membranes. However, the FFVs of the 6FDA‐based polyimides calculated from refractive index were 1.16–1.37 times larger than their FFV values. This FFV was dependent on the free‐volume space and optical factors, such as the refractive index and molar refraction, which affected the electronic structure and the interactions between the gas molecules and the polymer segments. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011
Influence of the die configuration on the gross melt fracture of linear polyethylene
Authors: Son Younggon 
Published: March 2011

AbstractIn this study, capillary extrusion experiments and rupture visualization experiments were carried out with a combined die configuration where two different dies were attached in a capillary rheometer. We observed that the gross melt fracture (GMF) and rupture of the melt occurred simultaneously when the diameter of the die located at the upstream position was larger than that of the die located downstream. However, when the location of the dies were interchanged, that is, the diameter of the upstream die was smaller than that of the downstream die, the upstream rupture did not accompany GMF up to a certain extent of shear rate. From these observations, we present a new theory on the origin of GMF. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Surface modification of armos fibers with oxygen plasma treatment for improving interfacial adhesion with poly(phthalazinone ether sulfone ketone) resin
Authors: Wang Jing , Chen Ping , Liu Wei , Li Hong , Jia Caixia , Lu Chun , Wang Baichen 
Published: March 2011

AbstractWe introduce in this article oxygen plasma treatment as a convenient and effective method for the surface modification of Armos fibers. The effects of oxygen‐plasma‐treatment power on both the Armos fiber surface properties and Armos‐fiber‐reinforced poly(phthalazinone ether sulfone ketone) composite interfacial adhesion were investigated. The Armos fiber surface chemical composition, surface morphology and roughness, and surface wettability as a function of oxygen‐plasma‐treatment power were measured by X‐ray photoelectron spectroscopy, scanning electronic microscopy, atomic force microscopy, and dynamic contact angle analysis. The results show that oxygen plasma treatment introduced a lot of reactive functional groups onto the fiber surface, changed the surface morphology, increased the surface roughness, and enhanced the surface wettability. Additionally, the effect of the oxygen‐plasma‐treatment power on the composite interfacial adhesion was measured by interlaminar shear strength with a short‐beam bending test. Oxygen plasma treatment was an effective method for improving the composite interfacial properties by both chemical bonding and physical effects. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Synthesis and characterization of novel heat resistance poly(amide‐imide)s from N,N′‐[2,5‐bis(4‐aminobenzylidene) cyclopentanone] bistrimellitimide acid and various aromatic diamines
Authors: Hajibeygi Mohsen , Faghihi Khalil , Shabanian Meisam 
Published: March 2011

AbstractA new‐type of dicarboxylic acid was synthesized from the reaction of 2,5‐bis(4‐aminobenzylidene)cyclopentanone with trimellitic anhydride in a solution of glacial acetic acid/pyridine (Py) at refluxing temperature. Six novel heat resistance poly(amide‐imide)s (PAIs) with good inherent viscosities were synthesized, from the direct polycondensation reaction of N,N′‐[2,5‐bis(4‐aminobenzylidene)cyclopentanone]bistrimellitimide acid with several aromatic diamines, by two different methods such as direct polycondensation in a medium consisting of N‐methyl‐2‐pyrrolidone (NMP)/triphenyl phosphite (TPP)/calcium chloride (CaCl2)/pyridine (Py) and direct polycondensation in a p‐toluene sulfonyl chloride (tosyl chloride, TsCl)/pyridine (Py)/N,N‐dimethylformamide (DMF) system. All of the above polymers were fully characterized by 1H NMR, FTIR, elemental analysis, inherent viscosity, solubility tests, UV‐vis spectroscopy, differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), and derivative of thermaogravimetric (DTG). The resulted poly(amide‐imide)s (PAIs) have showed admirable good inherent viscosities, thermal stability, and solubility. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Experimental determination of concentration dependence of nitrogen diffusivity in polypropylene
Authors: Kundra P. , Upreti S. R. , Lohi A. , Wu J. 
Published: March 2011

AbstractThis study determines the diffusivity of nitrogen as a function of its concentration in polypropylene at 170, 180, and 190°C in the range, 0.99–6.75 MPa. Isothermal pressure decay experiments are utilized to obtain the uptake of nitrogen by polypropylene with time. These data when used with a detailed mass transfer model, and the principles of variational calculus allow the determination of the nitrogen diffusivity. It is found to be a peak function with values in the range of 3.88 × 10−9 to 12.94 × 10−9 m2 s−1. Suitable correlations are found to represent the diffusivity in terms of pressure and nitrogen concentration at the three temperatures. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Plexiform Lesions in the Lungs of Domestic Fowl Selected for Susceptibility to Pulmonary Arterial Hypertension: Incidence and Histology
Authors: Wideman Robert F. , Hamal Krishna R. , Bayona Michael T. , Lorenzoni Alberto G. , Cross David , Khajali Fariborz , Rhoads Douglas D. , Erf Gisela F. , Anthony Nicholas B. 
Published: March 2011

AbstractPlexiform lesions develop in the pulmonary arteries of humans suffering from idiopathic pulmonary arterial hypertension (IPAH). Plexogenic arteriopathy rarely develops in existing animal models of IPAH. In this study, plexiform lesions developed in the lungs of rapidly growing meat‐type chickens (broiler chickens) that had been genetically selected for susceptibility to IPAH. Plexiform lesions developed spontaneously in: 42% of females and 40% of males; 35% of right lungs, and 45% of left lungs; and, at 8, 12, 16, 20, 24, and 52 weeks of age the plexiform lesion incidences averaged 52%, 50%, 51%, 40%, 36%, and 22%, respectively. Plexiform lesions formed distal to branch points in muscular interparabronchial pulmonary arteries exhibiting intimal proliferation. Perivascular mononuclear cell infiltrates consistently surrounded the affected arteries. Proliferating intimal cells fully or partially occluded the arterial lumen adjacent to plexiform lesions. Broilers reared in clean stainless steel cages exhibited a 50% lesion incidence that did not differ from the 64% incidence in flock mates grown on dusty floor litter. Microparticles (30 μm diameter) were injected to determine if physical occlusion and focal inflammation within distal pulmonary arteries might initiate plexiform lesion development. Three months postinjection no plexiform lesions were observed in the vicinity of persisting microparticles. Broiler chickens selected for innate susceptibility to IPAH represent a new animal model for investigating the mechanisms responsible for spontaneous plexogenic arteriopathy. Anat Rec, 2011. © 2011 Wiley‐Liss, Inc.
Based on a review of the data, use of the term ‘cypridinid’ solves the Cypridina/Vargula dilemma for naming the constituents of the luminescent system of ostracods in the family Cypridinidae
Authors: Morin James G. 
Published: March 2011

AbstractThis issue's featured article; Based on a review of the data, use of the term ‘cypridinid’ solves the Cypridina/Vargula dilemma for naming the constituents of the luminescent system of ostracods in the family Cypridinidae is authored by Jim Morin of Cornell University.The cover graphic indicates the evolutionary relationships among the luminescent and non‐luminescent species within the well‐known cypridinid ostracods including the Japanese species Vargula hilgendorfii, formerly known as Cypridina hilgendorfii, from which the components of this luminescent system were identified, including the cypridinid luciferin shown in the upper left. Because all luminescent members of the clade use the same basic components, to avoid confusion, it is most parsimonious to use the term ‘cypridinid’ rather than generic designations. Based on the phylogeny it can be inferred that luminescence first evolved as a predator deterrent and secondarily, but only in the Caribbean, as courtship signals. Only about half the species in the family are luminescent. Of the luminescent species, all probably use their light to deter predators while about half (the Caribbean species) also use their light in sexual reproduction. The family includes three recently described new luminescent genera and at least four undescribed luminescent genera (and probably several more). Several species (A‐F) are shown on the right including: A: Kornickeria n. sp.; B. H‐Group (new undescribed genus) n. sp.; C. Photeros morini; D. ‘Vargula’ hilgendorfii (note: this species belongs in a new undescribed genus separate from both Vargula and Cypridina); E. Cypridina dentata and F. Skogsbergia lerneri (a non‐luminescent species). See cited references 11–13 and references therein for details.
What are we studying? Student jurors, community jurors, and construct validity
Authors: Keller Stacie R. , Wiener Richard L. 
Published: March 2011

AbstractJury researchers have long been concerned about the generalizability of results from experiments that utilize undergraduate students as mock jurors. The current experiment examined the differences between 120 students (55 males and 65 females, mean age = 20 years) and 99 community members (49 males and 50 females, mean age = 42 years) in culpability evaluations for homicide and sexual assault cases. Explicit attitude measures served as indicators of bias for sexual assault, defendant, and homicide adjudication. Results revealed that student and community participants showed different biases on these general explicit attitude measures and these differences manifested in judgments of culpability (guilt likelihood, convincingness of state's arguments, convincingness of defendant's arguments, and the defendants' criminal intentions) in sexual assault and homicide case scenarios. The results also showed that student mock jurors were more lenient when assigning guilt in homicide cases than were community members. The implications for future mock jury research are discussed. Copyright © 2011 John Wiley & Sons, Ltd.
Java software platform for the development of advanced robotic virtual laboratories
Authors: Jara Carlos A. , Candelas Francisco A. , Pomares Jorge , Torres Fernando 
Published: March 2011

AbstractThis article presents an interactive Java software platform which enables any user to easily create advanced virtual laboratories (VLs) for Robotics. This novel tool provides both support for developing applications with full 3D interactive graphical interface and a complete functional framework for modelling and simulation of arbitrary serial‐link manipulators. In addition, its software architecture contains a high number of functionalities included as high‐level tools, with the advantage of allowing any user to easily develop complex interactive robotic simulations with a minimum of programming. In order to show the features of the platform, the article describes, step‐by‐step, the implementation methodology of a complete VL for Robotics education using the presented approach. Finally, some educational results about the experience of implementing this approach are reported. © 2011 Wiley Periodicals, Inc. Comput Appl Eng Educ 21:E14–E30, 2013
Ion‐Exchange Equilibria of Nitrates on a Strongly Basic Resin
Authors: Chabani M. , Akhrib K. , Ait Ouaissa Y. , Amrane A. , Bensmaili A. 
Published: March 2011

AbstractAdsorption isotherms of nitrates on the resin Amberlite IRA 410 at various pH values (6.8–12) were experimentally determined by batch tests. Six models involving two or three parameters are discussed. Concerning the Langmuir equation, the linear method had no significant effect on the estimation of isotherm parameters and simulation precision. Irrespective of the pH, the Sips model was found to give the best fit of the adsorption isotherm data. The maximum adsorption capacity decreased with increasing pH values and could be predicted by the correlation equations obtained in this study.
Functionally significant nicotine acetylcholine receptor subunit α5 promoter haplotypes are associated with susceptibility to lung cancer in Chinese
Authors: Zheng Xia , Duan Wenyuan , Xu Jing , Nie Chenxia , Yang Zhangmin , Wang Hongyan , Wang Weimin , Lu Daru 
Published: March 2011

AbstractBACKGROUND:Although recent genome‐wide association studies have been conducted to reveal the relation between variations in the α5 nicotinic receptor subunit and lung cancer in European and American populations, to the authors' knowledge, no definite information on the role of nicotine acetylcholine receptor subunit α5 (CHRNA5) in lung cancer risk has been obtained in a Chinese population.METHODS:To test this possible association, a case‐control study was conducted in 505 patients with lung cancer (cases) and a control group of 498 cancer‐free individuals.RESULTS:Participants were screened for variations in the CHRNA5 promoter region by sequencing, and 2 common polymorphisms were selected at −1640 (reference single nucleotide polymorphism identifier rs3829787 cytosine to thymine [C→T]) and at −62 (rs3841324 insertion→deletion [ins→del]) from the transcription start site of the CHRNA5 gene. Haplotype analysis revealed that the 2 least frequent haplotypes (T/ins and C/del) were statistically protective against lung cancer (P = .0002 and P = .0094, respectively). Unexpectedly, the luciferase results indicated that these 2 protective haplotype constructs had the extremely opposite promoter activity in various cells: the T/ins haplotype had the highest activity and the C/del haplotype had the lowest activity. Surface plasmon resonance demonstrated that both minor alleles (T and del) decreased DNA binding affinity to nuclear extracts, which the authors presumed was responsible for the disparity in promoter activity.CONCLUSIONS:The current results indicated that the CHRNA5 gene with under‐activated or over‐activated promoter activity may be protective against lung cancer. These results indicated a new associated risk pattern between CHRNA5 promoter activity and susceptibility to lung cancer that implies a complex role of the CHRNA5 gene in lung cancer. Cancer 2011;. © 2011 American Cancer Society.
High frequency of neurolymphomatosis as a relapse disease of intravascular large B‐cell lymphoma
Authors: Matsue Kosei , Hayama Brian Y. , Iwama Kan‐Ichi , Koyama Takafumi , Fujiwara Hideaki , Yamakura Masayuki , Takeuchi Masami , O'uchi Toshihiro 
Published: March 2011

AbstractBACKGROUND:Intravascular large B‐cell lymphoma (IVL) is characterized by lymphoma cell proliferation in the lumina of small vessels in various organs. A high incidence of neurologic symptoms associated with the central nervous system has been reported, but peripheral nerve involvement (neurolymphomatosis [NL]) rarely has been described.METHODS:The medical records from patients who were diagnosed with IVL over the past 4 years were reviewed. A diagnosis of NL was made based on the combination of neurologic symptoms and their correspondence with imaging studies, such as magnetic resonance imaging (MRI), 18F‐fluoro‐2‐deoxy‐D‐glucose (FDG)‐positron emission tomography/computed tomography (PET/CT), and/or the histologic confirmation of lymphoma cells within the peripheral nerves, nerve root/plexuses, or cranial nerves.RESULTS:Four patients with NL were identified among 11 patients who had IVL. All cases of NL occurred as relapsed disease during or shortly after the completion of chemotherapy. Although MRI studies of the brains and whole spines revealed nerve infiltration by gadolinium enhancement in 2 patients, the technology was not sensitive enough to detect such infiltration in the remaining 2 patients. In contrast, FDG‐PET/CT studies successfully revealed cranial or peripheral nerve lesions in all 4 patients and was useful for evaluating therapeutic response. Patients received treatment with high‐dose methotrexate with or without other systemic chemotherapy, which achieved varied success. Further studies will be needed to determine the optimal treatment.CONCLUSIONS:Considering the rarity of IVL and NL, the current observations suggested that IVL may have a predilection not only for the vessels but also for both the central and peripheral nervous systems. Cancer 2011. © 2011 American Cancer Society
Demonstration of true‐color high‐contrast microorganism imaging for terbium bioprobes
Authors: Jin Dayong 
Published: March 2011

AbstractLanthanide bioprobes offer a number of novel advantages for advanced cytometry, including the microsecond luminescence lifetime, sharp spectral emission, and large stokes shift. However, to date, only the europium‐based bioprobes have been broadly studied for time‐gated luminescence cell imaging, though a wide range of efficient terbium bioprobes have been synthesized and some of them are commercially available. We analyze that the bottleneck problem was due to the lack of an efficient microscope with pulsed excitation at wavelengths of 300–330 nm. We investigate a recently available 315 nm ultraviolet (UV) light emitting diode to excite an epifluorescence microscope. Substituting a commercial UV objective (40×), the 315 nm light efficiently delivered the excitation light onto the uncovered specimen. A novel pinhole‐assisted optical chopper unit was attached behind the eyepiece for direct lifetime‐gating to permit visual inspection of background‐free images. We demonstrate the use of a commercial terbium complex for high‐contrast imaging of an environmental pathogenic microorganism, Cryptosporidium parvum. As a result of effective autofluorescence suppression by a factor of 61.85 in the time domain, we achieved an enhanced signal‐to‐background ratio of 14.43. This type of time‐gating optics is easily adaptable to the use of routine epifluorescence microscopes, which provides an opportunity for high‐contrast imaging using multiplexed lanthanide bioprobes. © 2011 International Society for Advancement of Cytometry
Evaluation of the interaction between tramadol and diclofenac in several models of nociception in the rat
Authors: Rodríguez‐Silverio Juan , Déciga‐Campos Myrna , Reyes‐García Gerardo , Carrasco‐Portugal Miriam del Carmen , Flores‐Murrieta Francisco J. 
Published: March 2011

AbstractDiclofenac and tramadol are drugs widely used for the treatment of pain. However, side effects may limit their use. As both drugs produce side effects that are dose‐dependent, it seems appropriate to combine them in order to reduce the requirements for efficacy and, consequently, side effects. The purpose of this study was to evaluate the possible synergistic effect of these drugs in three experimental models of nociception in the rat. Dose‐response curves for diclofenac and tramadol were constructed in three models, thermal hyperalgesia, formalin, and hot plate. From these curves, ED40 or ED30 (according to the model employed) values were obtained and isobolographic analyses were carried out based on 0.5:0.5 proportions. Synergistic interactions were observed in the thermal hyperalgesia and hot plate models and an additive interaction was obtained in the formalin test. These results suggest a good therapeutic potential of this combination in the treatment of pain. Drug Dev Res 72: 391–396, 2011. © 2011 Wiley‐Liss, Inc.
Heart chamber size in zebrafish is regulated redundantly by duplicated tbx2 genes
Authors: Sedletcaia Anya , Evans Todd 
Published: March 2011

AbstractThe Tbx2 transcription factor is implicated in growth control based on its association with human cancers. In the heart, Tbx2 represses cardiac differentiation to mediate development of the atrioventricular canal (AVC). The zebrafish genome retains two tbx2 genes, and both are required for formation of the AVC. Here, we show that both genes are also expressed earlier in the primitive heart tube, and we describe a previously unrecognized role for Tbx2 in promoting proliferation of presumptive myocardium at the heart tube stage. In contrast to single knockdowns, depletion of both gene products causes chamber defects, resulting in an expanded atrium and a smaller ventricle, associated with decreased proliferation of ventricular cardiomyocytes. The phenotype correlates with changes in the expression for known cardiac growth factors. Therefore, in zebrafish, two tbx2 genes are functionally redundant for regulating chamber development, while each gene is required independently for development of the AVC. Developmental Dynamics 240:1548–1557, 2011. © 2011 Wiley‐Liss, Inc.
Dietary energy density and diet variety as risk factors for relapse in anorexia nervosa: A replication
Authors: Schebendach Janet , Mayer Laurel E. S. , Devlin Michael J. , Attia Evelyn , Walsh B. Timothy 
Published: March 2011

AbstractObjective:To replicate our previous findings of an association between energy density and diet variety in recently weight‐restored patients with anorexia nervosa (AN) and clinical outcome in the year following treatment.Method:Nineteen hospitalized, weight‐restored women with AN completed a food record, from which a diet energy density score (DEDS) and a diet variety score (DVS) were calculated. After hospital discharge, patients were contacted regularly; at the end of one year, clinical outcome was determined using modified Morgan‐Russell criteria. As in our previous study, outcome was dichotomized into “full, good, or fair” and “poor” groups.Results:Data from 16 subjects were available. The DEDS was significantly lower (p < .05) in the poor outcome group (0.7 ± 1) compared with the “full, good, or fair” outcome group (0.9 ± 1). Although the DVS was also lower in the poor outcome group (13.9 ± 2) compared with the “full, good or fair” outcome group (15.7 ± 1.8), this difference was not statistically significant.Discussion:In recently weight‐restored patients with AN, a lower DEDS, but not DVS, is associated with poor clinical outcome after inpatient treatment. This finding may be important in the assessment of risk for relapse in patients with AN. © 2011 Wiley Periodicals, Inc. (Int J Eat Disord 2012; 45:79–84)