bluuebunny/crossref_metadata_2025_split huggingface dataset:
Privacy‐preserving multireceiver ID‐based encryption with provable security
Authors: Tseng Yuh‐Min , Huang Yi‐Hung , Chang Hui‐Ju 
Published: June 2012

SUMMARYMultireceiver identity (ID) based encryption and ID‐based broadcast encryption allow a sender to use the public identities of multiple receivers to encrypt messages so that only the selected receivers or a privileged set of users can decrypt the messages. It can be used for many practical applications such as digital content distribution, pay‐per‐view and multicast communication. For protecting the privacy of receivers or providing receiver anonymity, several privacy‐preserving (or anonymous) multireceiver ID‐based encryption and ID‐based broadcast encryption schemes were recently proposed, in which receiver anonymity means that nobody (including any selected receiver), except the sender, knows who the other selected receivers are. However, security incompleteness or flaws were found in these schemes. In this paper, we propose a new privacy‐preserving multireceiver ID‐based encryption scheme with provable security. We formally prove that the proposed scheme is semantically secure for confidentiality and receiver anonymity. Compared with the previously proposed anonymous multireceiver ID‐based encryption and ID‐based broadcast encryption schemes, the proposed scheme has better performance and robust security. Copyright © 2012 John Wiley & Sons, Ltd.
Placental regulation of maternal‐fetal interactions and brain development
Authors: Hsiao Elaine Y. , Patterson Paul H. 
Published: June 2012

AbstractA variety prenatal insults are associated with the incidence of neurodevelopmental disorders such as schizophrenia, autism and cerebral palsy. While the precise mechanisms underlying how transient gestational challenges can lead to later life dysfunctions are largely unknown, the placenta is likely to play a key role. The literal interface between maternal and fetal cells resides in the placenta, and disruptions to the maternal or intrauterine environment are necessarily conveyed to the developing embryo via the placenta. Placental cells bear the responsibility of promoting maternal tolerance of the semiallogeneic fetus and regulating selective permeability of nutrients, gases, and antibodies, while still providing physiological protection of the embryo from adversity. The placenta's critical role in modulating immune protection and the availability of nutrients and endocrine factors to the offspring implicates its involvement in autoimmunity, growth restriction and hypoxia, all factors associated with the development of neurological complications. In this review, we summarize primary maternal‐fetal interactions that occur in the placenta and describe pathways by which maternal insults can impair these processes and disrupt fetal brain development. We also review emerging evidence for placental dysfunction in the prenatal programming of neurodevelopmental disorders. © 2012 Wiley Periodicals, Inc. Develop Neurobiol, 2012
Structure–Property Relationships in PtII Diimine‐Dithiolate Nonlinear Optical Chromophores Based on Arylethylene‐1,2‐dithiolate and 2‐Thioxothiazoline‐4,5‐dithiolate
Authors: Pintus Anna , Aragoni M. Carla , Bellec Nathalie , Devillanova Francesco A. , Lorcy Dominique , Isaia Francesco , Lippolis Vito , Randall Rebecca A. M. , Roisnel Thierry , Slawin Alexandra M. Z. , Woollins J. Derek , Arca Massimiliano 
Published: June 2012

AbstractEighteen new [PtII(N∧N)(S∧S)] complexes [23–40; N∧N = diimine: 2,2′‐bipyridine, 1,10‐phenanthroline and alkyl/aryl‐substituted derivatives; S∧S = arylethylene‐1,2‐dithiolate (R‐edt2–: R = phenyl, 2‐naphthyl, 1‐pyrenyl), N‐substituted 2‐thioxothiazoline‐4,5‐dithiolate (R‐dmet2–: R = methyl, ethyl, phenyl)] have been synthesized and characterized by spectroscopic (UV/Vis/NIR, fluorescence) and electrochemical (CV) measurements. Single‐crystal X‐ray diffraction analysis allowed structural characterization of five of the complexes (27–29, 31, and 37). Structural modifications capable of affecting the nature and energies of the frontier molecular orbitals in these systems were assessed and hybrid DFT and time‐dependent (TD) DFT calculations, carried out both in the gas phase and in the presence of several solvents (CH2Cl2, CHCl3, CH3CN, acetone, thf, dmf, dmso, and toluene), allowed the trends observed in the voltammetric data and in the energies of the peculiar solvatochromic visible absorption bands to be rationalized. In addition, to evaluate the second‐order nonlinear optical properties of 23–40, first static hyperpolarizability values βtot were calculated both in the gas phase and in CH2Cl2, the highest values being obtained for [Pt(N∧N)(Me‐dmet)] complexes (N∧N = 4,4′‐diphenyl‐2,2′‐bipyridine and 4,7‐diphenyl‐1,10‐phenanthroline; βtot = 691 × 10–30 and 604 × 10–30 esu, respectively).
Reactivity of (β‐Diketiminato)zinc Hydride toward Lewis Bases, Heterocumulenes and Cyclohexene Oxide
Authors: Bendt Georg , Schulz Stephan , Spielmann Jan , Schmidt Sarah , Bläser Dieter , Wölper Christoph 
Published: June 2012

AbstractThe reaction of LZnH (1) {L = Mesnacnac = [(2,4,6‐Me3C6H2)NC(Me)]2CH} with 4‐(dimethylamino)pyridine (dmap) yielded the Lewis acid–base adduct LZn(H)dmap (2), whereas LZn(Cl)dmap (3) was obtained from the equimolar reaction of LZnCl with dmap. In addition, reactions of 1 with di‐tert‐butylcarbodiimide [C(NtBu)2] and tert‐butyl thioisocyanate (tBuNCS) proceeded with insertion of the heterocumulene into the Zn–H bond and formation of [LZn(tBuNC(H)NtBu)] (4) and [LZn(tBuNC(H)S)] (5), whereas 1 reacted with Me3SiN3 with the elimination of Me3SiH and formation of [LZnN3]2 (6). Moreover, the reaction of 1 with cyclohexene oxide (CHO) occurred with ring opening and formation of [LZnOCy]2 (7) (Cy = cyclohexyl). Complexes 2–7 were characterized by multinuclear NMR (1H, 13C) and IR spectroscopy, elemental analyses and by single‐crystal X‐ray diffraction (2, 3, 6, 7).
Cross‐linked Poly(arylene ether ketone) Proton Exchange Membranes with High Ion Exchange Capacity for Fuel Cells
Authors: Zhou S. , Hai S. D. , Kim D. 
Published: June 2012

AbstractSulfonated poly(arylene ether ketone) (SPAEK) possessing the pendant carboxylic acid groups was synthesized. The carboxylic acid groups of SPAEK were reacted with a cross‐linking reagent to prepare a cross‐linked membrane with a high ion exchange capacity (IEC), a high oxidative stability, and an excellent mechanical strength. The cross‐linking hindered the mobility of the polymer chains and thus strongly affected the water uptake and the methanol permeability of the membranes. Also, as the cross‐linker used in this study bore sulfonic acid groups, cross‐linking did not lead to a noticeable loss of the proton conductivity. The cross‐linked SPAEK membrane with 20% cross‐linking density, CSPAEK‐20% membrane, exhibited a high proton conductivity of 0.045 S cm–1 associated with a high IEC value of 1.78 mmol g–1 but a low methanol permeability of 4.3 × 10–7 cm2 s–1. The CSPAEK‐20% membrane also showed excellent cell performance and oxidation resistance.
Evaluation of a Non‐sealed Solid Oxide Fuel Cell Stack with Cells Embedded in Plane Configuration
Authors: Tian Y. , Lü Z. , Wei B. , Zhu X. , Li W. , Wang Z. , Pan W. , Su W. 
Published: June 2012

AbstractA non‐sealed solid oxide fuel cell stack with cells embedded in plane configuration was fabricated and operated successfully in a box‐like stainless‐steel chamber. For a two‐cell stack, it demonstrated an open circuit voltage (OCV) of 2.13 V and a maximum power output of 569 mW at the flow rate of 67 sccm CH4 and 33 sccm O2. A fuel utilization of 4.16% was obtained. The cell performance was dominated by two different mechanisms, the polarization of the cathode at low current and the concentration polarization of the anode at high current. Finally, a scaled‐up stack with six cells in series generated an OCV of 6.4 V and a maximum power output of 8.18 W.
Zircon evaporation ages and geochemistry of metamorphosed volcanic rocks from the Vinjamuru domain, Krishna Province: evidence for 1.78 Ga convergent tectonics along the southeastern margin of the Eastern Dharwar Craton
Authors: Vadlamani Ravikant , Kröner A. , Vasudevan D. , Wendt I. , Tobschall H. , Chatterjee C. 
Published: June 2012

Palaeoproterozoic intermediate to potassic felsic volcanism in volcano‐sedimentary sequences could either have occurred in continental rift or at convergent magmatic arc tectonic settings. The Vinjamuru domain of the Krishna Province in Andhra Pradesh, SE India, contains such felsic and intermediate metavolcanic rocks, whose geochemistry constrains their probable tectonic setting and which were dated by the zircon Pb evaporation method in order to constrain their time of formation. These rocks consist of interlayered quartz–garnet–biotite schist, quartz–hematite–baryte–sericite schist as well as cherty quartzite, and represent a calc‐alkaline volcanic sequence of andesitic to rhyolitic rocks that underwent amphibolite‐facies metamorphism at ~1.61 Ga.Zircons from four felsic metavolcanic rock samples yielded youngest mean 207Pb/206Pb ages between 1771 and 1791 Ma, whereas the youngest zircon age for a meta‐andesite is 1868 Ma. A ~2.43 Ga zircon xenocryst reflects incorporation of Neoarchaean basement gneisses. Their calc‐alkaline trends, higher LILE, enriched chondrite‐normalized LREE pattern and negative Nb and Ti anomalies on primitive mantle‐normalized diagrams, suggest formation in a continental magmatic arc tectonic setting. Whereas the intermediate rocks may have been derived from mantle‐source parental arc magmas by fractionation and crustal contamination, the rhyolitic rocks had crustal parental magmas. The Vinjamuru Palaeoproterozoic volcanic eruption implies an event of convergent tectonism at the southeastern margin of the Eastern Dharwar Craton at ~1.78 Ga forming one of the major crustal domains of the Krishna Province. Copyright © 2012 John Wiley & Sons, Ltd.
Genotoxicity evaluation of titanium dioxide nanoparticles using the Ames test and Comet assay
Authors: Woodruff Robert S. , Li Yan , Yan Jian , Bishop Michelle , Jones M. Yvonne , Watanabe Fumiya , Biris Alexandru S. , Rice Penelope , Zhou Tong , Chen Tao 
Published: June 2012

ABSTRACTTitanium dioxide nanoparticles (TiO2‐NPs) are being used increasingly for various industrial and consumer products, including cosmetics and sunscreens because of their photoactive properties. Therefore, the toxicity of TiO2‐NPs needs to be thoroughly understood. In the present study, the genotoxicity of 10nm uncoated sphere TiO2‐NPs with an anatase crystalline structure, which has been well characterized in a previous study, was assessed using the Salmonella reverse mutation assay (Ames test) and the single‐cell gel electrophoresis (Comet) assay. For the Ames test, Salmonella strains TA102, TA100, TA1537, TA98 and TA1535 were preincubated with eight different concentrations of the TiO2‐NPs for 4 h at 37 °C, ranging from 0 to 4915.2 µg per plate. No mutation induction was found. Analyses with transmission electron microscopy (TEM) and energy‐dispersive X‐ray spectroscopy (EDS) showed that the TiO2‐NPs were not able to enter the bacterial cell. For the Comet assay, TK6 cells were treated with 0–200 µg ml–1 TiO2‐NPs for 24 h at 37 °C to detect DNA damage. Although the TK6 cells did take up TiO2‐NPs, no significant induction of DNA breakage or oxidative DNA damage was observed in the treated cells using the standard alkaline Comet assay and the endonuclease III (EndoIII) and human 8‐hydroxyguanine DNA‐glycosylase (hOGG1)‐modified Comet assay, respectively. These results suggest that TiO2‐NPs are not genotoxic under the conditions of the Ames test and Comet assay. Published 2012. This article is a US Government work and is in the public domain in the USA.
Turbulent forward–reverse mixing characteristics in vessel with multiple‐turbine impellers
Authors: Woziwodzki Szymon 
Published: June 2012

AbstractBACKGROUND: Mixing in unbaffled vessel with multiple‐turbine impellers was studied. The mixing time and mixing power were evaluated in relation to the distance between impellers and the number of impellers.RESULTS: It has been confirmed that frequency of oscillation has no influence on the mixing time and mixing power values or on drag and added mass coefficients. The coefficients were greater when distance between impellers was smaller. Moreover added mass coefficient was dependent on Reynolds number (ni > 2). Compared with unidirectional mixing conditions, for systems with one type of impeller, the power requirement was about 38% higher for forward‐reverse mixing. Despite the fact that the power demand was greater, the mixing time was not shorter, but about 30% higher than unidirectional mixing in a baffled vessel. However, the forward‐reverse mixing mode exhibits a higher level of homogeneity which it achieved faster than unidirectional mixing.CONCLUSION: The power requirements and mixing time for forward‐reverse mixing mode were higher in comparison with unidirectional mixing. Despite this, higher values of homogeneity were achieved faster. Higher levels of shear rate and better homogeneity indicate that forward‐reverse mixing can be beneficial for multi‐phase mixing in vessels with multiple impellers. © 2012 Society of Chemical Industry
Interference of EDTA in the treatment of metal plating wastewater by biosorption
Authors: Izquierdo Marta , Gabaldón Carmen , Marzal Paula 
Published: June 2012

AbstractBACKGROUND: The applicability of biosorption for the treatment of metal plating wastewater is adversely affected by the presence of complexing agents. To investigate this limitation on the removal of copper(II) onto peat, batch and column experiments were carried out using EDTA as the model complexing agent. The influence of pH and copper(II):EDTA mass ratios were evaluated for copper(II) concentrations between 5 and 100 mg Cu(II) dm−3.RESULTS: EDTA negatively affected the copper(II) uptake of peat for pH > 5. Batch and column experiments showed that copper(II)‐EDTA complexes were not sorbed by peat. The leaks of copper(II) detected from the beginning of the column operation matched the copper(II)‐EDTA concentration in the feed solutions. To overcome the interference of EDTA, a novel approach based on the combination of peat + activated carbon was proposed. Nearly complete removal of copper(II) was maintained over 70 h in the treatment of a solution containing 20 mg Cu(II) dm−3 with 11% of copper(II)‐EDTA complexes.CONCLUSION: A new mass transport model coupling copper(II) speciation in the feed and mass transfer rate‐controlled process simulated the copper(II) breakthrough curves in the presence of EDTA and could be used to successfully predict the breakthrough point. This work demonstrated that biosorption can also be applied for the treatment of wastewater containing complexing agents with the proper combination of sorbent materials. © 2012 Society of Chemical Industry
Effect of Restraint Stress on Lead‐Induced Male Reproductive Toxicity in Rats
Authors: HARI PRIYA P. , REDDY P. SREENIVASULA 
Published: June 2012

ABSTRACTThis study was undertaken to investigate whether chronic immobilization stress interferes with lead‐induced reproductive toxicity in rats. Early pubertal male Wistar rats were subjected to either restraint stress (5 hr/day) or maintained on lead (0.15%) containing water or both for 60 days. Restraint stress or lead treatment significantly decreased the weight of the testes and epididymis. The daily sperm production, epididymal sperm count, sperm motility, and sperm viability were also decreased after exposure to lead or subjected to restraint stress. The levels of serum testosterone and also activity levels of testicular hydroxysteroid dehydrogenases were significantly decreased with a significant increase in the serum follicle stimulating and luteinizing hormone levels in rats exposed to lead or restraint stress indicating decreased steroidogenesis. A significant increase in lipid peroxidation levels and decrease in catalase and superoxide dismutase activity levels were observed in the testes of rats subjected to restraint stress or exposed to lead indicating increased oxidative stress. Extensive histopathological malformations were observed in the testis of the treated rats. From the findings, the study suggests that restraint stress or exposure to lead affects male reproduction in rats by inducing oxidative stress followed by decreasing steroidogenesis and spermatogenesis. A significant decrease in spermatogenesis and steroidogenesis was also observed in rats subjected to both restraint stress and lead treatment as compared to lead alone treated rats indicating immobilization stress augments lead‐induced testicular and epididymal toxicity in rats. J. Exp. Zool. 000A:1‐11, 2012. © 2012 Wiley Periodicals, Inc.
Fighting Fish (Betta splendens) Bubble Nests Do Not Inhibit Microbial Growth
Authors: BROWN ALEXANDRIA C. , CLOTFELTER ETHAN D. 
Published: June 2012

ABSTRACTSome organisms produce antimicrobial substances in nesting foam to favorably manipulate the environment to which their developing offspring are exposed. We tested if fighting fishBetta splendensfoamy nest material, which is comprised of bubbles produced in the oral cavity of nesting males, has antimicrobial properties against a pathogenic bacteria (Edwardsiella tarda), a nonpathogenic bacteria (Escherichia coli), or a pathogenic oomycete (Saprolegnia parasitica). We also tested if exposure to nest material increases larval survival by performing in vitro fertilizations and individually incubating eggs in bubble nest extract or tank water (control). Our results show no evidence of antimicrobial properties of bubble nests. On the contrary, bubble nests provided favorable microenvironments for the growth ofSaprolegnia parasitica. Our results confirm earlier work citing the importance of male nest attendance, and suggest that the mechanism responsible for decreased survival in the absence of attending males is pathogenic microbes. J. Exp. Zool. 317A:481‐487, 2012. © 2012 Wiley Periodicals, Inc.
Time‐resolved dual‐station calf–foot three‐dimensional bolus chase MR angiography with fluoroscopic tracking
Authors: Johnson Casey P. , Borisch Eric A. , Glockner James F. , Young Phillip M. , Riederer Stephen J. 
Published: June 2012

AbstractPurpose:To refine, adapt, and evaluate the technical aspects of fluoroscopic tracking for generating dual‐station high‐spatial‐resolution MR angiograms of the calves and feet using a single injection of contrast material.Materials and Methods:Nine subjects (seven healthy volunteers followed by two patients) were imaged using a two‐station calf–foot three‐dimensional time‐resolved bolus chase MR angiography protocol which provided <1.0 mm3 spatial resolution throughout and 2.5‐ and 6.6‐s frame times at the calf and foot stations, respectively. Real‐time reconstruction of calf station time frames allowed visually guided triggering of table advance to the foot station. The studies were independently read and scored by two radiologists in six image quality categories.Results:On average, overall diagnostic quality at the calf and foot stations was good‐to‐excellent, the calf arteries and all but the smallest foot arteries had good‐to‐excellent signal and sharpness, artifact and venous contamination were minor, and signal continuity across the inter‐station interface was good.Conclusion:The feasibility of fluoroscopic tracking has been demonstrated as an efficient approach for high spatiotemporal imaging of the arteries of the calves and feet with good‐to‐excellent diagnostic quality and low degrading venous contamination. J. Magn. Reson. Imaging 2012;36:1168–1178. © 2012 Wiley Periodicals, Inc.
Influence of sulfur deficiency on chlorophyll‐meter readings of corn leaves
Authors: Pagani Agustín , Echeverría Hernán E. 
Published: June 2012

AbstractSulfur (S)‐diagnostic tools are essential for rational use of S fertilizers. There is little information about the suitability of leaf greenness intensity to detect S deficiency in corn (Zea mays L.). This work evaluates, under controlled S‐stressed conditions, (1) the performance of leaf greenness intensity as an indicator of the degree of S deficiency in corn, and (2) the advantage of the upper leaves in relation to the middle leaves for S‐deficiency determination. A pot experiment using sand as growth medium was conducted in greenhouse with corn at S rates of 0, 5, 10, 20, and 40 mg kg–1 and sufficiency of other nutrients. Measurements of aboveground biomass (AB), total nitrogen (N), and S concentrations, and chlorophyll‐meter readings (CMR) in upper and middle leaves, were performed at the growth stages of 6–7, 11–12, and 14–15 fully expanded leaves (V6‐V7, V11‐V12, and V14‐V15, respectively). Sulfur application significantly increased AB, leaf S concentration, and CMR. Significantly positive relationships were obtained between leaf S concentration and CMR. A sulfur‐sufficiency index (SSI) based on CMR measured in upper and middle leaves was significantly associated with AB (R2 = 0.58 and 0.62 for the middle and upper leaves, respectively). It is concluded that under sufficiency of other nutrients and high‐S‐stressed conditions, leaf greenness intensity could be a good indicator of corn S status, although little or no advantage was found for taking CMR from the upper leaves.
Self‐assembled CdSe/CdS nanorod micro‐lasers fabricated from solution by capillary jet deposition
Authors: Zavelani‐Rossi M. , Krahne R. , Della Valle G. , Longhi S. , Franchini I.R. , Girardo S. , Scotognella F. , Pisignano D. , Manna L. , Lanzani G. , Tassone F. 
Published: June 2012

AbstractHere we show an innovative, simple and reliable method to fabricate micro‐lasers by self‐assembly of rod‐shaped nanocrystals. We use dot/rod core/shell CdSe/CdS nanorods to form optical micro‐resonators by exploiting their self‐organization into well‐defined coffee stain rings. The fabrication process merely consists of capillary jet deposition of a nanorod solution onto a glass substrate, and is scalable, economic, and highly reproducible. Upon optical pumping of the micro‐resonators we obtain laser emission in the red or in the blue‐green spectral region, demonstrating lasing both from core and shell transitions, with low pumping thresholds. Modeling by full‐wave numerical simulations according to generalized (i. e. scattering) formulation of laser theory demonstrates lasing from complex modes of the self‐assembled cavity.
Overexpression of crkl correlates with poor prognosis and cell proliferation in non‐small cell lung cancer
Authors: Wang Yan , Dong Qian‐ze , Fu Ling , Stoecker Maggie , Wang Endi , Wang En‐Hua 
Published: June 2012

AbstractCrk‐Like (CRKL) is an adapter protein that has crucial roles in multiple biological processes, including cell proliferation, adhesion, and migration. Amplification of CRKL gene was found in non‐small cell lung cancer (NSCLC). However, the expression pattern of CRKL protein and its clinical significance in human NSCLC have not been well characterized to date. In this study, expression of CRKL was evaluated in 131 NSCLC tissues by immumohistochemistry. CRKL protein was up‐regulated in the lung carcinomas compared with adjacent normal lung tissue. Overexpression of CRKL was found in 58 of 131 (44.3%) NSCLC samples and correlated with poor tumor differentiation (P = 0.0042), histological type (adenocarcinoma; P = 0.001), advanced p‐TNM stage (P = 0.0004), nodal metastasis (P = 0.0273), high proliferation index (P = 0.0062) and poor overall survival (P = 0.0084). Further univariate and multivariate analysis showed a significant association of CRKL overexpression and worse overall survival in lung cancer patients. In addition, overexpression of CRKL in HBE and H1299 cell lines promoted cell proliferation by facilitating cell cycle progression. Further analysis of cell cycle related molecules showed that CRKL induced cyclin D1, cyclin B1 expression, and increased Rb phosphorylation. In conclusion, this study demonstrated overexpression of CRKL correlated with poor prognosis and lung cancer proliferation by cell cycle regulation. © 2012 Wiley Periodicals, Inc.