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https://www.readbyqxmd.com/read/28320116/in-vitro-non-viral-murine-pro-neurotrophin-3-gene-transfer-into-rat-bone-marrow-stromal-cells
#1
Shahram Darabi, Taki Tiraihi, AliReza Delshad, Majid Sadeghizadeh, Wisam Khalil, Taher Taheri
Neurotrophin 3 (NT-3) is an important factor for promoting prenatal neural development, as well as regeneration, axogenesis and plasticity in postnatal life. Therapy with NT-3 was reported to improve the condition of patients suffering from degenerative diseases and traumatic injuries, however, the disadvantage of NT-3 protein delivery is its short half-life, thus our alternative approach is the use of NT-3 gene therapy. In this study, the bone marrow stromal cells (BMSCs) were isolated from adult rats, cultured for 4 passages and transfected with either pEGFP-N1 or a constructed vector containing murine proNT-3 (pSecTag2/HygroB-murine proNT-3) using Lipofectamine 2000 followed by Hygromycin B (200mg/kg)...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28320044/multiple-concomitant-oral-cavity-cancers-incidence-management-and-outcomes
#2
Huang-Kai Kao, Mohamed Abdelrahman, Yenlin Huang, Chia-Hsuan Tsai, Megias J Barrera, Ngan-Ming Tsang, Adam J Couves, Ming-Huei Cheng, Kai-Ping Chang
BACKGROUND: Little is known about the appropriate treatment and long-term survival of patients with multiple concomitant oral cavity cancers (MOC). The aim of this study was to clarify the clinicopathological features of MOC, to compare the prognosis of MOC patients with that of patients with single oral cavity cancers (SOC), and to describe reconstructive options based on the concept of economy in autologous tissue transfer. METHODS: Data from 603 patients diagnosed with at least one squamous cell carcinoma of the oral cavity who underwent surgery for primary oral cavity cancers between 2006 and 2014 were reviewed retrospectively to identify MOC patients...
March 20, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28319867/phototherapeutic-spectrum-expansion-through-synergistic-effect-of-mesoporous-silica-trio-nanohybrids-against-antibiotic-resistant-gram-negative-bacterium
#3
Yaswanth Kuthati, Ranjith Kumar Kankala, Prabhakar Busa, Shi-Xiang Lin, Jin-Pei Deng, Chung-Yuan Mou, Chia-Hung Lee
The extensive impact of antibiotic resistance has led to the exploration of new anti-bacterial modalities. We designed copper impregnated mesoporous silica nanoparticles (Cu-MSN) with immobilizing silver nanoparticles (SNPs) to apply photodynamic inactivation (PDI) of antibiotic-resistant E. coli. SNPs were decorated over the Cu-MSN surfaces by coordination of silver ions on diamine-functionalized Cu-MSN and further reduced to silver nanoparticles with formalin. We demonstrate that silver is capable of sensitizing the gram-negative bacteria E...
March 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28319838/graphene-oxide-quantum-dot-sensitized-porous-titanium-dioxide-microsphere-visible-light-driven-photocatalyst-based-on-energy-band-engineering
#4
Yu Zhang, Fuyuan Qi, Ying Li, Xin Zhou, Hongfeng Sun, Wei Zhang, Daliang Liu, Xi-Ming Song
We report a novel graphene oxide quantum dot (GOQD)-sensitized porous TiO2 microsphere for efficient photoelectric conversion. Electro-chemical analysis along with the Mott-Schottky equation reveals conductivity type and energy band structure of the two semiconductors. Based on their energy band structures, visible light-induced electrons can transfer from the p-type GOQD to the n-type TiO2. Enhanced photocurrent and photocatalytic activity in visible light further confirm the enhanced separation of electrons and holes in the nanocomposite...
March 11, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28319774/kinetics-and-mechanism-of-hemicelluloses-removal-from-cellulosic-fibers-during-the-cold-caustic-extraction-process
#5
Jianguo Li, Huichao Hu, Hailong Li, Liulian Huang, Lihui Chen, Yonghao Ni
The effective separation of hemicelluloses and cellulose is desirable for the production of high-purity cellulose, which is a sustainable raw material for many value-added applications. For this purpose, the kinetics and mechanism of hemicelluloses removal from the cold caustic extraction (CCE) were investigated in the present study. The hemicelluloses removal process consists of: 1) the bulk phase, characteristic of significant hemicelluloses removal; 2) the transition phase, hemicelluloses transferring from the inner to the outer region of the fiber wall, with negligible overall hemicelluloses removal; 3) the residual phase, presenting a weak but continuing hemicelluloses removal...
March 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28319739/mechanism-and-kinetics-of-halogenated-compound-removal-by-metallic-iron-transport-in-solution-diffusion-and-reduction-within-corrosion-films
#6
Shun Tang, Xiao-Mao Wang, Shi-Ting Liu, Hong-Wei Yang, Yuefeng F Xie, Xiao-Yi Yang
A detailed kinetic model comprised of mass transport (ktra), pore diffusion (kdif), adsorption and reduction reaction (krea), was developed to quantitatively evaluate the effect of corrosion films on the removal rate (kobs) of halogenated compounds by metallic iron. Different corrosion conditions were controlled by adjusting the iron aging time (0 or 1 yr) and dissolved oxygen concentration (0-7.09 mg/L DO). The kobs values for bromate, mono-, di- and tri-chloroacetic acids (BrO3(-), MCAA, DCAA and TCAA) were 0...
March 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28319663/2h-ws2-quantum-dots-produced-by-modulating-the-dimension-and-phase-of-1t-nanosheets-for-antibody-free-optical-sensing-of-neurotransmitters
#7
Man-Jin Kim, Su-Ji Jeon, Tae Woog Kang, Jong-Min Ju, DaBin Yim, Hye-In Kim, Jung Hyun Park, Jong-Ho Kim
Modulating the dimensions and phases of transition metal dichalcogenides is of great interest to enhance their intrinsic properties or to create new physicochemical properties. Herein, we report an effective approach to synthesize 2H-WS2 quantum dots (QDs) via the dimension and phase engineering of 1T-WS2 nanosheets. The solvothermal reaction of chemically-exfoliated 1T-WS2 nanosheets in N-methyl-2-pyrrolidone (NMP) under an N2 atmosphere induced their chopping and phase transition at lower temperature to produce 2H-WS2 QDs with a high quantum yield (5...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28319662/optimizing-charge-injection-across-transition-metal-dichalcogenide-heterojunctions-theory-and-experiment
#8
Jie Guan, Hsun-Jen Chuang, Zhixian Zhou, David Tomanek
In search of an improved strategy to form low-resistance contacts to semiconducting transition metal dichalcogenides, we combine ab initio density functional electronic structure calculations for an NbSe2/WSe2 interface with quantum transport measurements of the corresponding heterojunction between a few-layer WSe2 semiconductor and a metallic NbSe2 layer. Our theoretical results suggest that, besides a rigid band shift associated with charge transfer, the presence of NbSe2 does not modify the electronic structure of WSe2...
March 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/28319647/cancer-specific-intracellular-reductive-activation-of-anticancer-pt-iv-prodrugs
#9
Andriy Mokhir, Viktor Reshetnikov, Steffen Daum
Since cellular uptake of anticancer Pt(II)- and Pt(IV)-drugs occurs via different mechanisms, the latter ones can exhibit substantial activity towards cells, which have either intrinsic or acquired resistance towards Pt(II)-drugs. However, this positive effect is diminished due to reductive activation of Pt(IV)-drugs in extracellular space that can be one of the reasons why they were not yet approved for clinical use despite over 60 clinical trials conducted worldwide. Herein we suggest a solution to this problem by achieving highly specific intracellular versus extracellular prodrug reduction...
March 20, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28319440/markers-of-blood-coagulation-and-fibrinolysis-in-patients-with-early-and-delayed-microsurgical-reconstructions-in-the-lower-extremities
#10
Oliver Kloeters, Dalibor Vasilic, Pieter Hupkens, Dietmar Ulrich
BACKGROUND: In this study, markers of coagulation and fibrinolysis were assessed during early and delayed microsurgical reconstruction in patients with traumatic defects of their lower legs to analyse whether an imbalance of the hemostasis after trauma might predispose the development of vascular complications. METHODS: The prospective study included 70 patients. In 35 patients, surgery was performed within 72 hours after injury. In 35 other patients, delayed free flap transfer was performed between 14-21 days after trauma...
March 20, 2017: Journal of Plastic Surgery and Hand Surgery
https://www.readbyqxmd.com/read/28319388/visualizing-intramolecular-vibrational-redistribution-in-cyclotrimethylene-trinitramine-rdx-crystal-by-multiplex-coherent-anti-stokes-raman-scattering
#11
Guoyang Yu, Yangyang Zeng, Wencan Guo, Honglin Wu, Gangbei Zhu, Zhaoyang Zheng, Xianxu Zheng, Yunfei Song, Yanqiang Yang
The femtosecond time-resolved multiplex coherent anti-Stokes Raman scattering (CARS) technique has been performed to investigate the intramolecular vibrational redistribution (IVR) through vibrational couplings in RDX molecules. In the multiplex CARS experiment, the supercontinuum (SC) was used as broadband Stokes light to coherently and collectively excite multiple vibrational modes, and quantum beats arising from vibrational couplings among these modes were observed. The IVR of RDX is visualized by a topological graph of these vibrational couplings...
March 20, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28319385/structural-and-electronic-properties-of-transition-metal-oxides-attached-to-a-single-walled-cnt-as-a-lithium-ion-battery-electrode-a-first-principles-study
#12
Liew Weng Tack, Mohd Asyadi Azam, Raja Noor Amalina Raja Seman
Single-walled carbon nanotubes (SWCNTs) and metal oxides (MOs), such as manganese (IV) oxide (MnO2), cobalt (II, III) oxide (Co3O4), and nickel (II) oxide (NiO) hybrid structures, have received great attention because of their promising application in lithium-ion batteries (LIBs). As electrode materials for LIBs, the structure of SWCNT/MOs provides high power density, good electrical conductivity, and excellent cyclic stability. In this work, first-principles calculations were used to investigate the structural and electronic properties of MOs attached to (5, 5) SWCNT and Li-ion adsorption to SWCNT/ metal oxide composites as electrode materials in LIBs...
March 20, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28319374/mechanisms-of-energy-transfer-and-enhanced-stability-of-carbidonitride-phosphors-for-solid-state-lighting
#13
Christopher Grieco, Kurt F Hirsekorn, Andrew T Heitsch, Alan C Thomas, Mark H McAdon, Britt A Vanchura, Michael M Romanelli, Lora L Brehm, Anne Leugers, Anatoliy Sokolov, John B Asbury
Phosphor-converted light emitting diodes (pcLEDs) produce white light through the use of phosphors that convert blue light emitted from the LED chip into green and red wavelengths. Understanding the mechanisms of degradation of the emission spectra and quantum yields of the phosphors used in pcLEDs is of critical importance to fully realize the potential of solid state lighting as an energy efficient technology. Toward this end, time-resolved photoluminescence spectroscopy was used to identify the mechanistic origins of enhanced stability and luminescence efficiency that can be obtained from a series of carbidonitride red phosphors with varying degree of substitutional carbon...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28319373/morphology-controllable-synthesis-of-zn-co-mixed-sulfide-nanostructures-on-carbon-fiber-paper-towards-efficient-rechargeable-zinc-air-batteries-and-water-electrolysis
#14
Xiaoyu Wu, Xiaopeng Han, Xiaoya Ma, Wei Zhang, Yida Deng, Cheng Zhong, Wenbin Hu
It remains an ongoing challenge to develop cheap, highly active and stable electrocatalysts to promote the sluggish electrocatalytic oxygen evolution, oxygen reduction, and hydrogen evolution reactions for rechargeable metal-air batteries and water-splitting systems. In this work, we report the morphology-controllable synthesis of zinc cobalt mixed sulfide (Zn-Co-S) nanoarchitectures, including nanosheets, nanoplates, and nanoneedles, grown on conductive carbon fiber paper (CFP) and the micro-nanostructure dependent electrochemical efficacy for catalyzing hydrogen and oxygen in zinc-air batteries and water electrolysis...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28319301/successive-charge-transitions-of-unusually-high-valence-fe-3-5-charge-disproportionation-and-intermetallic-charge-transfer
#15
Yoshiteru Hosaka, Fabio Denis Romero, Noriya Ichikawa, Takashi Saito, Yuichi Shimakawa
A perovskite-structure oxide containing unusually high-valence Fe(3.5+) was obtained by high-pressure synthesis. Instability of the Fe(3.5+) in Ca0.5 Bi0.5 FeO3 is relieved first by charge disproportionation at 250 K and then by intermetallic charge transfer between A-site Bi and B-site Fe at 200 K. These previously unobserved successive charge transitions are due to competing intermetallic and disproportionation charge instabilities. Both transitions change magnetic and structural properties significantly, indicating strong coupling of charge, spin, and lattice in the present system...
March 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28319295/cytosine-radical-cation-a-gas-phase-study-combining-irmpd-spectroscopy-uv-pd-spectroscopy-ion-molecule-reactions-and-theoretical-calculations
#16
Michael Lesslie, John T Lawler, Andy Dang, Joseph A Korn, Daniel Bim, Vincent Steinmetz, Philippe Maitre, Frantisek Turecek, Victor Ryzhov
The radical cation of cytosine (Cyt*+) was generated via dissociative oxidation from a ternary Cu(II) complex in the gas phase. The radical cation was characterized by infrared multiple photon dissociation (IRMPD) spectroscopy in the fingerprint region, UV-VIS photodissociation (UV-PD), ion-molecule reactions, and theoretical calculations (density functional theory and ab initio). The IRMPD experimental spectrum has diagnostic bands for two enol/amino and two keto/amino tautomers of Cyt*+, that were calculated to be among the lowest-energy isomers in concert with a previous work (J...
March 20, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28319277/the-systematic-review-and-meta-analysis-of-free-flap-safety-in-the-elderly-patients
#17
Galip Gencay Üstün, Ali Emre Aksu, Hakan Uzun, Ozan Bitik
BACKGROUND: Prolonged mean life expectancy gives rise to a more populated and older patient group. With increasing number of cases during the past decades, older patients are regarded as candidates for microsurgical interventions. Whether advanced patient age is an independent risk factor for microsurgical reconstruction is still an ongoing matter of debate. METHODS: The Cochrane Central Register of Controlled Trials, PubMed, MEDLINE, CINAHL and EMBASE databases were screened for combination of the key words "elderly", "geriatric", "advanced age", "free flap", "microsurgery", free tissue transfer" by using time limits between 1989 and 2015...
March 20, 2017: Microsurgery
https://www.readbyqxmd.com/read/28319268/developmental-changes-in-feeding-behaviors-of-infant-chimpanzees-at-mahale-tanzania-implications-for-nutritional-independence-long-before-cessation-of-nipple-contact
#18
Takuya Matsumoto
OBJECTIVES: Weaning of chimpanzees is considered to occur at 4-5-years-old with complete cessation of nipple contact and timing of reconception calculated by inter-birth interval minus gestation length. This is also the basis of "early weaning" in humans (i.e., approximately 2.5-years-old). However, recent studies of the survival of orphans and the first molar (M1) eruption in wild chimpanzees have predicted that infants move toward nutritional independence at 3-years-old. Therefore, this study aimed to investigate ontogeny of feeding behavior at around 3-years-old in wild infant chimpanzees...
March 20, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28319260/the-second-time-flap-from-the-previously-used-anterior-thigh-donor-site-for-head-and-neck-microsurgical-reconstruction
#19
Nidal Farhan Al Deek, Chun-Ta Liao, Shiang-Fu Huang, Chung-Jan Kan, Kai-Ping Chang, Ku-Hao Fang, Chung-Kan Tsao
BACKGROUND: Multiple free tissue transfer from the same donor site is not well described for microsurgical head and neck reconstruction. METHODS: Between (8/2011 and 11/2012), 103 patients received 103 free ALT flaps for head and neck reconstruction; flaps were called first-time ALT flaps. Intra-operative findings were used to assess the presence of a favorable anatomy for a future second flap from the same donor site. And, between 9/2009 and 12/2013, second-time flaps from previously used anterior thighs were attempted either freely or guided by the intra-operative data from the previous surgery...
March 20, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28319240/two-paradigms-for-endovascular-thrombectomy-after-intravenous-thrombolysis-for-acute-ischemic-stroke
#20
Gaspard Gerschenfeld, Ioan-Paul Muresan, Raphael Blanc, Michael Obadia, Marie Abrivard, Michel Piotin, Sonia Alamowitch
Importance: Intravenous thrombolysis (IVT) followed by mechanical thrombectomy (MT) is recommended to treat acute ischemic stroke (AIS) with a large vessel occlusion (LVO). Most hospitals do not have on-site MT facilities, and most patients need to be transferred secondarily after IVT (drip and ship), which may have an effect on the neurologic outcome. Objective: To compare the functional independence at 3 months between patients treated under the drip-and-ship paradigm and those treated on site (mothership)...
March 20, 2017: JAMA Neurology
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