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Li-Ling Yue, Fu-Chao Wang, Ming-Long Zhang, Dan Liu, Ping Chen, Qing-Bu Mei, Peng-Hui Li, Hong-Ming Pan, Li-Hong Zheng
We tested the hypothesis that genetic variation in ATM and BMI-1 genes can alter the risk of breast cancer through genotyping 6 variants among 524 breast cancer cases and 518 cancer-free controls of Han nationality. This was an observational, hospital-based, case-control association study. Analyses of single variant, linkage, haplotype, interaction and nomogram were performed. Risk was expressed as odds ratio (OR) and 95% confidence interval (CI). All studied variants were in the Hardy-Weinberg equilibrium and were not linked...
April 24, 2018: Journal of Cellular and Molecular Medicine
Jaechul Lee, Chong Yang Chuah, Jaheon Kim, Youngsuk Kim, Nakeun Ko, Younggyu Seo, Kimoon Kim, Taehyun Bae, Eunsung Lee
Separation of acetylene from carbon dioxide and ethylene is challenging in view of their similar sizes and physical properties. Metal-organic frameworks (MOFs) in general present themselves to be strong candidates for these separations owing to the presence of functional pore surfaces that can selectively capture a specific target molecule. Here, we report a novel 3D microporous cationic framework named JCM-1, which possesses imidazolium functional groups on the pore surfaces and pyrazolate as a metal binding group which is well known to form strong metal to ligand bond...
April 24, 2018: Angewandte Chemie
Claudio S Quilodrán, Mathias Currat, Juan I Montoya-Burgos
Human-induced habitat changes may lead to the breakdown of reproductive barriers between distantly related species. This phenomenon may result in fertile first-generation hybrids (F1 ) that exclude the genome of one parental species during gametogenesis, thus disabling introgression. The species extinction risk associated with hybridization with genome exclusion is largely underappreciated because the phenomenon produces only F1 hybrid phenotype, leading to the misconception that hybrids are sterile and potentially of minor conservation concern...
April 24, 2018: Conservation Biology: the Journal of the Society for Conservation Biology
M Wendt, L K Mahnke, C Näther, J van Leusen, P Kögerler, W Bensch
The first mixed antimonato-germanato polyoxovanadates were synthesized using two different strategies, highlighting the critical role of the precursors. Following the traditional route using multiple single sources as precursors the polyanions [V15Sb2Ge4O42(OH)4(H2O)]6- (1) and [V15Sb3Ge3O42(OH)3(H2O)]6- (2) are obtained, which display disorder of their Sb/Ge positions, indicating that clusters of different compositions are in equilibrium in solution. In contrast, if the water-soluble single-source precursor {Ni(en)3}3[V15Sb6O42(H2O)]·ca...
April 25, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
A Bentivoglio, M Ancona, C A Brackley, G Gonnella, D Marenduzzo
We study a variant of a recently proposed non-equilibrium stochastic model for supercoiling-dependent transcription in DNA. In the case of a circular DNA molecule with overall positive supercoiling, we find a non-equilibrium phase transition between an absorbing phase, where all genes are switched off due to the supercoiling, and an active phase with a non-zero transcription rate. Mean field theory predicts that the transition should be continuous at a critical value of the background supercoiling, and we focus our analysis on this case...
April 25, 2018: Soft Matter
Yuya O Nakagawa, Masataka Watanabe, Hiroyuki Fujita, Sho Sugiura
A pure quantum state can fully describe thermal equilibrium as long as one focuses on local observables. The thermodynamic entropy can also be recovered as the entanglement entropy of small subsystems. When the size of the subsystem increases, however, quantum correlations break the correspondence and mandate a correction to this simple volume law. The elucidation of the size dependence of the entanglement entropy is thus essentially important in linking quantum physics with thermodynamics. Here we derive an analytic formula of the entanglement entropy for a class of pure states called cTPQ states representing equilibrium...
April 24, 2018: Nature Communications
James P Karchner, Farzad Yousefi, Stephanie R Bitman, Kurosh Darvish, Nancy Pleshko
Objective Autologous articular cartilage (AC) harvested for repair procedures of high weight bearing (HWB) regions of the femoral condyles is typically obtained from low weight bearing (LWB) regions, in part due to the lack of non-destructive techniques for cartilage composition assessment. Here, we demonstrate that infrared fiber optic spectroscopy can be used to non-destructively evaluate variations in compositional and mechanical properties of AC across LWB and HWB regions. Design AC plugs ( N = 72) were harvested from the patellofemoral groove of juvenile bovine stifle joints, a LWB region, and femoral condyles, a HWB region...
April 1, 2018: Cartilage
Shahid Manzoor, Anna Schnürer, Erik Bongcam-Rudloff, Bettina Müller
Syntrophic acetate oxidation operates close to the thermodynamic equilibrium and very little is known about the participating organisms and their metabolism. Clostridium ultunense is one of the most abundant syntrophic acetate-oxidising bacteria (SAOB) that are found in engineered biogas processes operating with high ammonia concentrations. It has been proven to oxidise acetate in cooperation with hydrogenotrophic methanogens. There is evidence that the Wood-Ljungdahl (WL) pathway plays an important role in acetate oxidation...
April 23, 2018: Genes
Diana Nara Ribeiro de Sousa, Sara Insa, Antonio Aparecido Mozeto, Mira Petrovic, Thiago Faheina Chaves, Pedro Sergio Fadini
The performances of two FAU-type zeolites with different SiO2 /Al2 O3 ratios were evaluated for the removal of antibiotics of three different classes, namely azithromycin, ofloxacin, and sulfamethoxazole, from aqueous solutions. Commercial zeolites were used, without any previous treatment. Use of a small adsorbent dosage resulted in fast antibiotic adsorption that followed pseudo-second order kinetics. The removals of azithromycin and sulfamethoxazole were highly pH-dependent, with low removal percentages observed under acid (pH 2...
April 17, 2018: Chemosphere
Jerosha Ifthikar, Xiang Jiao, Audrey Ngambia, Ting Wang, Aimal Khan, Ali Jawad, Qiang Xue, Lei Liu, Zhuqi Chen
In this paper, sewage sludge, a solid waste from wastewater treatment plant, which eagerly requires proper treatment was reused as solid support in the form of sewage sludge biochar, then modified with carboxymethyl chitosan to form a bio-adsorbent. Further, carboxymethyl chitosan coating on sewage sludge biochar improved carboxymethyl chitosan's stability in water. The prepared bio-adsorbent revealed a shorter equilibrium time (<60 min) for Pb(II) adsorption and a superior capacity of 594.17 mg g-1 for Hg(II) adsorption, which are so far the best recorded performance achieved for chitosan based adsorbents...
April 14, 2018: Bioresource Technology
Rangabhashiyam Selvasembian, Balasubramanian P
Biosorption potential of novel lignocellulosic biosorbents Musa sp. peel (MSP) and Aegle marmelos shell (AMS) was investigated for the removal of toxic triphenylmethane dye malachite green (MG), from aqueous solution. Batch experiments were performed to study the biosorption characteristics of malachite green onto lignocellulosic biosorbents as a function of initial solution pH, initial malachite green concentration, biosorbents dosage, and temperature. Biosorption equilibrium data were fitted to two and three parameters isotherm models...
May 12, 2018: International Journal of Phytoremediation
Somayeh Naderi, Mahdiyeh Gholami, Bahram Baninasab, Majid Afyuni
Many reports have already been published regarding the removal of heavy metals from aqueous solutions onto activated carbon. However, the biosorbents' effect on the plant response still needs further investigation. In this study, activated carbon derived from the pomegranate peel [pomegranate activated carbons (PAC)] was used to see the effects of the addition of PAC on growing strawberry in Cd-contaminated sand. Cd accumulation and toxicity to strawberry was investigated by measuring the concentration of Cd in plant tissues and various biochemical activities of plant...
May 12, 2018: International Journal of Phytoremediation
Kiran Kumar, Sachin S Patavardhan, Saritha Lobo, Richard Gonsalves
Excess of copper ion (>2 mg/L) in water is toxic to human beings and the ecosystem. Various water treatment technologies for copper remediation have been investigated in the past. Along with industrial effluents, Bordeaux mixture is also a noteworthy copper contamination source in the agricultural ecosystem. In our study, the biosorbent efficiency of dried orange peel was investigated through an environment-friendly process for the removal of cupric ions. Effects of pH, adsorbate concentration, adsorbent dosage, and temperature for the removal of Cu (II) were studied...
May 12, 2018: International Journal of Phytoremediation
Chengmei Zhong, Vinod K Sangwan, Chen Wang, Hadallia Bergeron, Mark C Hersam, Emily A Weiss
Mixed-dimensional van der Waals heterojunctions comprising polymer and two-dimensional (2D) semiconductors have many characteristics of an ideal charge separation interface for optoelectronic and photonic applications. However, the photoelectron dynamics at polymer-2D semiconductor heterojunction interfaces are currently not sufficiently understood to guide the optimization of devices for these applications. This manuscript reports a systematic exploration of the time-dependent photophysical processes that occur upon photoexcitation of a type-II heterojunction between the polymer PTB7 and monolayer MoS2 ...
April 24, 2018: Journal of Physical Chemistry Letters
Koki Kawase, Jyunichiro Abe, Mizuki Tenjimbayashi, Yuta Kobayashi, Keisuke Takahashi, Seimei Shiratori
Redox flow batteries (RFBs) have emerged as a promising candidate for large-scale energy storage because of the flexible design for high energy, power, and safety. In this study, FeCl3 ·6H2 O/urea composite deep eutectic catholyte (FeU-DEC)-infused self-standing carbon nanofiber (CNF) was synthesized for green and high power density RFB through industrially available processes. FeU-DEC-infused CNF displayed an extremely high power density (874 mW/g) as well as high capacity (27.28 mAh/g) derived from high theoretical capacity of FeU-DEC (89...
April 24, 2018: ACS Applied Materials & Interfaces
Eric Delpire, Kenneth B Gagnon
Two genes encode the Na+ -K+ -2Cl- cotransporters, NKCC1 and NKCC2, that mediate the tightly coupled movement of 1Na+ , 1K+ , and 2Cl- across the plasma membrane of cells. Na+ -K+ -2Cl- cotransport is driven by the chemical gradient of the three ionic species across the membrane, two of them maintained by the action of the Na+ /K+ pump. In many cells, NKCC1 accumulates Cl- above its electrochemical potential equilibrium, thereby facilitating Cl- channel-mediated membrane depolarization. In smooth muscle cells, this depolarization facilitates the opening of voltage-sensitive Ca2+ channels, leading to Ca2+ influx, and cell contraction...
March 25, 2018: Comprehensive Physiology
Weidong Zhu, Qianni Zhang, Chunfu Zhang, Dazheng Chen, Long Zhou, Zhenhua Lin, Jingjing Chang, Jincheng Zhang, Yue Hao
Non-equilibrium Ti4+-doped hematite (Ti-Fe2O3) is explored successfully as an electron transporting layer (ETL) material for planar perovskite solar cells, which were simply processed by quenching the ETL films at high temperature after thermal annealing. High-temperature quenching can fix Ti4+ dopants in the bulk lattices of Ti-Fe2O3 and suppress surficial TiOx segregations on it, which obviously increase the doping density and decrease surficial electron traps in Ti-Fe2O3 ETLs, thereby greatly improving their electron transport properties...
April 24, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Isuru R Ariyarathna, Evangelos Miliordos
The charged molybdenum monoxides, MoO+,2+,- were studied by multireference configuration interaction and coupled cluster calculations in conjunction with large basis sets. Full potential energy curves were constructed and bonding patterns were proposed for several low-lying electronic states of the three species. Our numerical results involve accurate equilibrium bond lengths, harmonic vibrational frequencies, anharmonicities, excitation energies, and binding energies. This is the first high-level theoretical investigation and our results compare favorably with the limited existing experimental data...
April 24, 2018: Physical Chemistry Chemical Physics: PCCP
Zhengming Xu, Dexia Han, Yuan Li, Pingling Zhang, Lijun You, Zhengang Zhao
In this study, the FPA90-Cl resin was magnetized with supported Fe3 O4 particles using a chemical co-precipitation method and its removal performance of bromate and coexisting precursors was explored. The magnetized FPA90-Cl resin was structurally characterized by SEM, FT-IR, and XRD. The effects of the initial concentrations, temperature, and resin dosage on bromate and bromide ion removal in drinking water were investigated using batch experiments. The magnetized FPA90-Cl resin exhibited a high removal efficiency for bromate and bromide ions at three initial concentrations, and the residual bromate concentrations were under the maximum contaminant level (MCL) of 10 μg L-1 after 80 min...
April 23, 2018: Environmental Science and Pollution Research International
Dmitry V Zaretsky, Andrej A Romanovsky, Maria V Zaretskaia, Yaroslav I Molkov
Tissue temperature increases, when oxidative metabolism is boosted. The source of nutrients and oxygen for this metabolism is the blood. The blood also cools down the tissue, and this is the only cooling mechanism, when direct dissipation of heat from the tissue to the environment is insignificant, e.g. , in the brain. While this concept is relatively simple, it has not been described quantitatively. The purpose of the present work was to answer two questions: 1) to what extent can oxidative metabolism make the organ tissue warmer than the body core, and, 2) how quickly are changes in the local metabolism reflected in the temperature of the tissue? Our theoretical analysis demonstrates that, at equilibrium, given that heat exchange with the organ is provided by the blood, the temperature difference between the organ tissue and the arterial blood is proportional to the arteriovenous difference in oxygen content, does not depend on the blood flow, and cannot exceed 1...
2018: Temperature: Multidisciplinary Biomedical Journal
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