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https://www.readbyqxmd.com/read/29786939/an-update-on-enzymatic-cocktails-for-lignocellulose-breakdown
#1
REVIEW
Andreza de Mello Lopes, Edivaldo Ximenes Ferreira Filho, Leonora Rios de Souza Moreira
Alternative energy sources have received increasing attention in recent years. The possibility of adding value to agricultural wastes, by producing biofuels and other products with economic value from lignocellulosic biomass by enzymatic hydrolysis, has been widely explored. Lignocellulosic biomass, as well as being an abundant residue, is a complex recalcitrant structure that requires a consortium of enzymes for its complete degradation. Pools of enzymes with different specificities acting together usually produce an increase in hydrolysis yield...
May 22, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29786601/heterogeneous-photocatalysis-and-its-potential-applications-in-water-and-wastewater-treatment-a-review
#2
Syed N Ahmed, Waseem Haider
There has been a considerable amount of research in the development of sustainable water treatment techniques capable of improving the quality of water. Unavailability of drinkable water is a crucial issue especially in regions where conventional drinking water treatment systems fail to eradicate aquatic pathogens, toxic metal ions and industrial waste. The research and development in this area have given rise to a new class of processes called Advanced Oxidation Processes, particularly in the form of heterogeneous photocatalysis, which converts photon energy into chemical energy...
May 22, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29785088/insight-into-resistance-mechanism-of-anaplastic-lymphoma-kinase-to-alectinib-and-jh-viii-157-02-caused-by-g1202r-solvent-front-mutation
#3
Han Wang, Yao Wang, Wentao Guo, Bin Du, Xiaobing Huang, Riping Wu, Baoyu Yang, Xiaoyan Lin, Yilan Wu
Background: Mutated anaplastic lymphoma kinase (ALK) drives the development of advanced non-small cell lung cancer (NSCLC). Most reported small-molecule inhibitors targeting the ALK domain do not display good inhibition of the G1202R solvent front mutation. The solvent front mutation was assumed to hinder drug binding. However, a different fact could be uncovered by the simulations reported in this study through a structural analog of alectinib (JH-VIII-157-02), which demonstrated potent effects against the G1202R mutation...
2018: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29784975/a-unique-cytoplasmic-atpase-complex-defines-the-legionella-pneumophila-type-iv-secretion-channel
#4
David Chetrit, Bo Hu, Peter J Christie, Craig R Roy, Jun Liu
Type IV secretion systems (T4SSs) are complex machines used by bacteria to deliver protein and DNA complexes into target host cells1-5 . Conserved ATPases are essential for T4SS function, but how they coordinate their activities to promote substrate transfer remains poorly understood. Here, we show that the DotB ATPase associates with the Dot-Icm T4SS at the Legionella cell pole through interactions with the DotO ATPase. The structure of the Dot-Icm apparatus was solved in situ by cryo-electron tomography at 3...
May 21, 2018: Nature Microbiology
https://www.readbyqxmd.com/read/29783001/laparoscopic-extraperitoneal-pelvic-lymph-node-debulking-in-locally-advanced-cervical-cancer
#5
Diaz-Feijoo Berta, Luna-Guibourg Rocio, Cabrera Silvia, Manrique Susana, Gil-Moreno Antonio
OBJECTIVE: To demonstrate the feasibility of laparoscopic extraperitoneal approach for pelvic metastatic lymph node debulking in locally advanced cervical cancer. DESIGN: Surgical video article. Canadian task force Classification III. SETTING: University Hospital PATIENT: A 52 year-old patient presented a stage IIA2 Cervical adenocarcinoma according to FIGO classification. The physical exam reported a 45 mm tumor. Positron emission tomography (PET- CT) was positive for hypermetabolic enlarged lymph nodes in left external iliac region of 1...
May 18, 2018: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/29782658/recent-advances-on-black-phosphorus-for-energy-storage-catalysis-and-sensor-applications
#6
REVIEW
Hanwen Liu, Kui Hu, Dafeng Yan, Ru Chen, Yuqin Zou, Hongbo Liu, Shuangyin Wang
As a new type of 2D semiconductor, black phosphorus (BP) possesses high charge-carrier mobility and theoretical capacity, thickness-dependent bandgap, and anisotropic structure, which has attracted tremendous attention since early 2014. To explore its full application in all aspects, studies based on BP nanostructures are swiftly expanding from the electronic field to energy storage and even biochemistry. The mechanism and application of BP in Li-/Na-ion battery anodes, oxygen evolution reaction/hydrogen evolution reaction catalysis, photocatalytic hydrogen production, and selective sensors are summarized...
May 21, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29781625/vertically-emitting-indium-phosphide-nanowire-lasers
#7
Wei-Zong Xu, Fang-Fang Ren, Dimitars Jevtics, Antonio Hurtado, Li Li, Qian Gao, Jiandong Ye, Fan Wang, Benoit Guilhabert, Lan Fu, Hai Lu, Rong Zhang, Hark Hoe Tan, Martin Dawson, Chennupati Jagadish
Semiconductor nanowire (NW) lasers have attracted considerable research effort given their excellent promise for nanoscale photonic sources. However, NW lasers currently exhibit poor directionality and high threshold gain, issues critically limiting their prospects for on-chip light sources with extremely reduced footprint and efficient power consumption. Here, we propose a new design and experimentally demonstrate a vertically emitting indium phosphide (InP) NW laser structure showing high emission directionality and reduced energy requirements for operation...
May 21, 2018: Nano Letters
https://www.readbyqxmd.com/read/29781617/unexpected-optical-blue-shift-in-large-colloidal-quantum-dots-by-anionic-migration-and-exchange
#8
Maria Acebron, Juan F Galisteo-López, Cefe Lopez, Facundo C Herrera, Martin D Mizrahi, Felix G Requejo, Francisco Javier Palomares, Beatriz H Juarez
Compositional changes taking place during the synthesis of alloyed CdSeZnS nanocrystals (NCs) allow shifting the optical features to higher energy as the NCs grow. Under certain synthetic conditions, the effect of those changes on the surface/interface chemistry competes with and dominates over the conventional quantum confinement effect in growing NCs. These changes, identified by means of complementary advanced spectroscopic techniques such as XPS (X-ray Photoelectron Spectroscopy) and XAS (X-ray absorption Spectroscopy), are understood in the frame of an ion migration and exchange mechanism taking place during the synthesis...
May 21, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29781126/versatile-nanostructures-from-rice-husk-biomass-for-energy-applications
#9
Zhaofeng Wang, Andrew T Smith, Weixing Wang, Luyi Sun
Converting biomass into valuable products has great benefits in terms of both economy and environment, which has attracted considerable attention in recent years. The mass generation of rice husks (RHs) as well as their rich and unique chemical components enable them to be one of the most widely investigated biomasses. RH biomass was initially utilized to produce bulk materials for conventional applications, while a variety of advanced nanostructures (NSs) have been fabricated during the past few years. In addition to their low-cost and environmentally friendly nature, the RH derived NSs (RH-NSs) exhibit versatile properties, promising for broad applications in various fields...
May 20, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29780458/spin-states-vibrations-and-spin-relaxation-in-molecular-nanomagnets-and-spin-qubits-a-critical-perspective
#10
REVIEW
Luis Escalera-Moreno, José J Baldoví, Alejandro Gaita-Ariño, Eugenio Coronado
Very recently the closely related fields of molecular spin qubits, single ion magnets and single atom magnets have been shaken by unexpected results. We have witnessed a jump in the phase memory times of spin qubits from a few microseconds to almost a millisecond in a vanadium complex, magnetic hysteresis up to 60 K in a dysprosium-based magnetic molecule and magnetic memory up to 30 K in a holmium atom deposited on a surface. With single-molecule magnets being more than two decades old, this rapid improvement in the physical properties is surprising and its explanation deserves urgent attention...
April 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780356/physiological-and-molecular-mechanisms-of-methionine-restriction
#11
REVIEW
Mary Neslund Latimer, Khalid Walid Freij, Beth M Cleveland, Peggy R Biga
Methionine restriction (MR) has been studied extensively over the last 25 years for its role in altering metabolic hallmarks of disease. Animals subjected to MR, display changes in metabolic flexibility demonstrated by increases in energy expenditure, glucose tolerance, and lifespan. These changes have been well characterized in a number of model systems and significant progress has been made in understanding how hepatic fibroblast growth factor 21 links MR to several components of its metabolic phenotype...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29779970/transarterial-chemoembolization-plus-iodine-125-implantation-for-hepatocellular-carcinoma-a-systematic-review-and-meta-analysis
#12
REVIEW
Ze-Xin Zhu, Xiao-Xue Wang, Ke-Fei Yuan, Ji-Wei Huang, Yong Zeng
BACKGROUND: Hepatocellular carcinoma (HCC) is the most common malignancy in liver. Transarterial chemoembolization (TACE) is recommended as an effective treatment in advanced HCC patients. Recent studies showed iodine-125 seed (a low-energy radionuclide) can provide long-term local control and increase survival for HCC patients. The aim of the study was to evaluate the outcome of TACE plus iodine-125 seed in comparison with TACE alone for HCC. METHODS: A comprehensive search of studies among PubMed, Embase, Cochrane Central Register of Controlled Trials, and Cochrane Database of Systematic Reviews was conducted with published date from the earliest to January 10th, 2018...
May 17, 2018: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://www.readbyqxmd.com/read/29779427/alcohol-mixed-with-energy-drinks-and-sexually-related-causes-of-conflict-in-the-barroom
#13
Natalie J Ball, Kathleen E Miller, Brian M Quigley, Rebecca K Eliseo-Arras
The popularity of alcohol mixed with energy drinks (AmED) among young adults has spurred studies that focus on its links to aggression and risk-taking behaviors, including risky sex and sexual victimization. However, no studies to date have looked at the relationship between AmED and causes of interpersonal conflict in bars at the event level. The present study evaluated whether AmED use at the time of the bar conflict was associated with greater odds that a bar conflict would be precipitated by sexually related causes...
May 1, 2018: Journal of Interpersonal Violence
https://www.readbyqxmd.com/read/29778978/tough-love-accommodating-intracellular-bacteria-through-directed-secretion-of-antimicrobial-peptides-during-the-nitrogen-fixing-symbiosis
#14
REVIEW
Christina Stonoha-Arther, Dong Wang
The symbiosis formed by nitrogen-fixing bacteria with plant hosts mainly in the legume family involves a very intimate interaction. Within the symbiotic organ (the nodule) the bacteria are fully internalized by the host cell to become an intracellular organelle surrounded by a host-derived membrane. This arrangement is probably necessary for the efficient provision of energy and the sequestration of free oxygen molecules, two conditions required for sustained nitrogen fixation. Recent advances made in model legume species, such as Medicago truncatula, are beginning to uncover the genetic components allowing rhizobia to access the host cytoplasm and establish chronic intracellular infections without overt detrimental effects...
May 17, 2018: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/29777971/symmetric-supercapacitor-sulphurized-graphene-and-ionic-liquid
#15
Jasmin S Shaikh, Navajsharif S Shaikh, Rohini Kharade, Sonali A Beknalkar, Jyoti V Patil, Mahesh P Suryawanshi, Pongsakorn Kanjanaboos, Chang Kook Hong, Jin Hyeok Kim, Pramod S Patil
Symmetric supercapacitor is advanced over simple supercapacitor device due to their stability over a large potential window and high energy density. Graphene is a desired candidate for supercapacitor application since it has a high surface area, good electronic conductivity and high electro chemical stability. There is a pragmatic use of ionic liquid electrolyte for supercapacitor due to its stability over a large potential window, good ionic conductivity and eco-friendly nature. For high performance supercapacitor, the interaction between ionic liquid electrolyte and graphene are crucial for better charge transportation...
May 11, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29775756/pkm2-a-potential-target-for-regulating-cancer
#16
REVIEW
Yu-Huan Li, Xiao-Feng Li, Jia-Tao Liu, Hua Wang, Lu-Lu Fan, Jun Li, Guo-Ping Sun
Aberrated glucose metabolism is a key future of cancer cells. Unlike normal cells, tumor cells favor glycolysis even in the presence of sufficient oxygen. Pyruvate kinase (PK), a key glucose metabolic enzyme, converts phosphoenolpyruvate (PEP) to pyruvate by transferring the high-energy phosphate group to adenosine diphosphate (ADP) to produce adenosine triphosphate (ATP). Pyruvate kinase M2 (PKM2), one of the four isozyme of PK, which universally expressed in rapidly proliferating cells such as embryonic cells and cancer cells...
May 15, 2018: Gene
https://www.readbyqxmd.com/read/29775314/qm-mm-simulations-with-the-gaussian-electrostatic-model-a-density-based-polarizable-potential
#17
Hatice Gokcan, Eric Granville Kratz, Thomas A Darden, Jean-Philip Piquemal, Gerardo Andres Cisneros
The use of advanced polarizable potentials in Quantum Mechanical/Molecular Mechanical (QM/MM) simulations have been shown to improve the overall accuracy of the calculation. We have developed a density-based potential called the Gaussian Electrostatic Model (GEM), which has been shown to provide very accurate environments for QM wavefunctions in QM/MM. In this contribution we present a new implementation of QM/GEM that extends our implementation to include all components (Coulomb, exchange-repulsion, polarization, and dispersion) for the total inter-molecular interaction energy in QM/MM calculations, except for the charge-transfer term...
May 18, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29775279/plasma-jet-printing-and-in-situ-reduction-of-highly-acidic-graphene-oxide
#18
Avishek Dey, Satheesh Krishnamurthy, James Bowen, Dennis Nordlund, M Meyyappan, Ram P Gandhiraman
Miniaturisation of electronic devices and the advancement of Internet of things pose exciting challenges to develop technologies for patterned deposition of functional nanomaterials. Printed and flexible electronic devices and energy storage devices can be embedded onto clothing or other flexible surfaces. Graphene oxide (GO) has gained much attention in printed electronics due its solution processability, robustness and high electrical conductivity in the reduced state. Here we introduce a new approach to print GO films from highly acidic suspensions with in-situ reduction using an atmospheric pressure plasma jet...
May 18, 2018: ACS Nano
https://www.readbyqxmd.com/read/29775180/broadband-polarized-emission-from-p-ndi2od-t2-polymer
#19
Steve Ulrich, Tabitha Sutch, Greg Szulczewski, Matthias Schweizer, Newton Barbosa, Paulo Araujo
We investigate the P(NDI2OD-T2) photophysical properties via absorbance and fluorescence spectroscopy, in association with the experimental approach baptized Stokes Spectroscopy, which provides valuable material information through the acquisition and analysis of the fluorescence polarization degree. By changing solvents and using different samples such as solutions, thick, and thin films, it is possible to control the polarization degree spectrum associated to the fluorescence emitted by the polymer's isolated chains and aggregates...
May 18, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29774917/uniform-li-deposition-regulated-via-three-dimensional-polyvinyl-alcohol-nanofiber-networks-for-effective-li-metal-anodes
#20
Gang Wang, Xunhui Xiong, Zhihua Lin, Jie Zheng, Zheng Fenghua, Youpeng Li, Yanzhen Liu, Chenghao Yang, Yiwei Tang, Meilin Liu
Lithium metal anodes are considered to be the most promising anode material for next-generation advanced energy storage devices due to their high reversible capacity and extremely low anode potential. Nevertheless, the formation of dendritic Li, induced by the repeated breaking and repairing of solid electrolyte interphase layers, always causes poor cycling performance and low coulombic efficiency, as well as serious safety problems, which have hindered the practical application of Li anodes for a long time...
May 18, 2018: Nanoscale
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