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https://www.readbyqxmd.com/read/28550749/a-novel-non-enzymatic-glucose-sensor-based-on-the-modification-of-carbon-paste-electrode-with-cuo-nanoflower-designing-the-experiments-by-response-surface-methodology-rsm
#1
Zahra Amani-Beni, Alireza Nezamzadeh-Ejhieh
A non enzymatic modified electrode was constructed based on the modification of carbon paste electrode with CuO nanoflower (CuO-CPE). The raw and modified samples were characterized by XRD, TEM, SEM-EDX and X-ray mapping techniques. The proposed CuO-CPE showed a well voltammetric peak pair in cyclic voltammetry which of peak currents were decreased in the presence of glucose. Hence, this decrease in peak current was used for voltammetric determination of glucose. To evaluate interactions between the influencing variables, experiments were designed by response surface methodology (RSM) and the results showed CuO%-pH have the most effect on square wave voltammetric response...
May 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28550746/zn-doped-cdo-nanoparticles-structural-morphological-optical-photocatalytic-and-anti-bacterial-properties
#2
Vinod Kumar Gupta, Ali Fakhri, Shiva Tahami, Shilpi Agarwal
Pure and zinc-doped CdO NPs (Zn-CdO NPs) were synthesized through a facile co-precipitation method. The structural, morphology, chemical composition, optical and antibacterial activity of the NPs were studied with respect to pure and Zn-doped CdO concentration (0-7.5mol.%). Scanning electron microscope (SEM) images reveal that pure and Zn-doped CdO NPs were in the nano-scale regime with different crystalline morphology. The energy dispersive X-ray spectroscopy (EDS) spectrum predicts the presence of Cadmium (Cd), Zinc (Zn) and Oxygen (O) in the prepared samples...
May 21, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28550745/facile-synthesis-and-characterization-of-a-novel-silica-molybdenum-disulfide-hybrid-material
#3
Keqing Zhou, Xiaodong Qian, Rui Gao, Fuding Mei
To improve the dispersion of MoS2 in polymer matrix, a facile synthesis approach was developed in this study through a synergetic effect between two kinds of nanofillers with different dimensionality. The nanohybrids based on two dimensional (2D) MoS2 and 0D silica nanospheres were fabricated by in situ growth method without any surfactants. Characterizations of the hybrid materials were done by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Solid-state (29)Si nuclear magnetic resonance (NMR) spectra, transmission electron micrographs (TEM) and scanning electron microscopy (SEM)...
May 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28550717/ooxtaxonomy-of-eight-tettigonoidea-species-insecta-orthoptera-description-and-comparison-of-the-egg-morphology
#4
Marta Franch Sas, Josep M Olmo-Vidal, Marcos Roca-Cusachs, Juli Pujade-Villar
In the present study, eggs of eight species of the Tettigonoidea superfamily have been examined with the aim to find characteristic traits of each of the studied taxa. In addition, we aim to distinguish them through their eggshell morphology, a technique that nowadays is known as ootaxonomy. All the eggs analysed belong to four subfamilies of the Tettigoniidae family (Bradyporinae: Ephippiger diurnus cunii, Parasteropleurus perezii, Lluciapomaresius panteli, L. ortegai, Tettigoniinae: Decticus verrucivorus, Antaxius hispanicus, and Meconematinae: Cyrtaspis scutata) and from family Phaneropteridae: Phaneroptera nana...
May 17, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28550716/ex-vivo-measurement-of-scalp-follicular-infundibulum-delivery-of-zinc-pyrithione-and-climbazole-from-an-anti-dandruff-shampoo
#5
Guoqiang Chen, Chengdong Ji, Miao Miao, Kang Yang, Yajun Luo, Michael Hoptroff, Luisa Z Collins, Hans-Gerd Janssen
Efficient delivery of anti-dandruff (AD) actives into the scalp follicular infundibulum as well as onto the scalp surface is critical for the efficacy of AD shampoos. A method involving scalp cyanoacrylate (CA) biopsy sampling, a tailor made cutting device, ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) analysis, scanning electron microscopy (SEM) measurement and Raman imaging has been developed for the measurement of delivery of zinc pyrithione (ZPT) and climbazole (CBZ) from an AD shampoo into the scalp follicular infundibulum...
May 17, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28550633/the-efficiency-of-the-multi-walled-carbon-nanotubes-used-for-antibiotics-removal-from-wastewaters-generated-by-animal-farms
#6
Maria-Loredana Soran, Ocsana Opriş, Ildikó Lung, Irina Kacso, Alin S Porav, Manuela Stan
In the recent years, residual antibiotics are considered to be emerging environmental pollutants due to their continuous input and persistence into the aquatic ecosystem even at low concentrations. Therefore, these are necessary to develop efficient methods for the wastewater treatment. The present paper describes the efficiency of several types of multi-walled carbon nanotubes (MWCNTs) for the retention of the selected antibiotics (ampicillin, ceftazidime, cefepime, imipenem, piperacillin, tazobactam, tetracycline, erythromycin, ciprofloxacin, norfloxacin, vancomycin, gentamicin, sulfamethoxazole, and thrimetoprim) from aqueous (synthetic) solutions and wastewater samples...
May 27, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28550154/an-amperometric-h2o2biosensor-based-on-hemoglobin-nanoparticles-immobilized-onto-a-gold-electrode
#7
Vinay Narwal, Neelam Yadav, Manisha Thakur, Chandra Shekhar Pundir
The nanoparticles (NPs) of hemoglobin (Hb) were prepared by desolvation method and characterized by transmission electron microscopy (TEM), ultraviolet (UV) spectroscopy and Fourier-transform infrared spectroscopy (FTIR). An amperometric H2O2 biosensor was constructed by immobilizing HbNPs covalently onto a polycrystalline Au electrode (AuE). HbNPs/AuE was characterized by scanning electron microscopy (SEM), cyclic voltammetry (CV) and electrochemical impedance spectra (EIS) before and after immobilization of HbNPs...
May 26, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28549863/isolation-and-characterization-of-microcrystalline-cellulose-from-roselle-fibers
#8
Lau Kia Kian, Mohammad Jawaid, Hidayah Ariffin, Othman Y Alothman
In this study, microcrystalline cellulose (MCC) was extracted from roselle fiber through acid hydrolysis treatment and its properties were compared with those of commercially available MCC. The physicochemical and morphological characteristics, elemental composition, size distribution, crystallinity and thermal properties of the obtained MCC were analyzed in this work. Fourier transform infrared spectroscopy (FTIR) analysis provided clear evidence that the characteristic peak of lignin was absent in the spectrum of the MCC prepared from roselle fiber...
May 23, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28549810/biodiesel-production-from-microbial-oil-derived-from-wood-isolate-trichoderma-reesei
#9
B Bharathiraja, V Sowmya, Sridevi Sridharan, D Yuvaraj, J Jayamuthunagai, R Praveenkumar
In the present study Trichoderma reesei, a wood isolate can yield high biomass quantities up to 30g/L, yielding 32.4% of lipids of dry cell weight (DCW). Biodiesel production from Trichoderma reesei involved simple unit operations like filtration and ultrasonication, yet giving good lipid yield with desirable bio-diesel properties. Optimization of ultrasonication conditions was done to ensure maximum lipid extraction. SEM analysis of ultrasonicated samples showed distinct breakage of fungal hyphae. The lipids were found to contain 49...
May 17, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28549376/one-step-electrospinning-route-of-srtio3-modified-rutile-tio2nanofibers-and-its-photocatalytic-properties
#10
Weijie Zhao, Jing Zhang, Jiaqi Pan, Jianfeng Qiu, Jiantao Niu, Chaorong Li
The SrTiO3 modified rutile TiO2 composite nanofibers were synthesized by a simple electrospinning technique. The result of XRD, SEM and TEM indicate that the SrTiO3/TiO2 heterojuction has been prepared successfully. Compared with the TiO2 and SrTiO3, the photocatalytic activity of the SrTiO3/TiO2 (rutile) for the degradation of methyl orange exhibits an obvious enhancement under UV illumination. which is almost 2 times than that of bare TiO2 (rutile) nanofiber. Further, the high crystallinity and photon-generated carrier separation of the SrTiO3/TiO2 heterojuction are considered as the main reason for this enhancement...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28549314/application-of-novel-metal-organic-framework-mil-53-fe-and-its-magnetic-hybrid-for-removal-of-pharmaceutical-pollutant-doxycycline-from-aqueous-solutions
#11
Shakiba Naeimi, Hossein Faghihian
As a pharmaceutical pollutant, doxycycline causes contamination when enters into the environment. In this research MIL-53(Fe), and its magnetic hybrid MIL-53(Fe)/Fe3O4 were synthesized and employed for removal of doxycycline from aqueous solutions. The adsorbents were characterized by XRD, SEM, BET, FTIR, EDAX, VSM and TG-DTG technique. The effect of different variables such as DOC concentration, pH, contacting time, and adsorbent dose on the removal efficiency was studied and under optimized conditions the adsorption capacity of 322mgg(-1) was obtained...
May 11, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28549306/pretreatment-of-corn-stover-by-solid-acid-for-d-lactic-acid-fermentation
#12
Xiqing Wang, Gang Wang, Xiaoxiao Yu, Huan Chen, Yang Sun, Guang Chen
Solid acid is a new acid that is safe and green, which has been widely used in the fields of acid pickling. In this study, we adopted solid acid to pretreat corn stover and used the pretreated corn stover in the fermentation of d-lactic acid. Finally, we obtained optimal conditions for the pretreatment of corn stover by solid acid: digestion temperature of 120°C, digestion time of 80min, and solid acid concentration of 1.5%. Then adding cellulase of 30FPU/g, the conversion rate of glucose reached 71.06% after enzymatic hydrolysis for 72h...
April 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28549180/relationships-among-self-perception-of-aging-physical-functioning-and-self-efficacy-in-late-life
#13
Hava Tovel, Sara Carmel, Victoria H Raveis
Objectives: The purpose of the current study was to examine the longitudinal relationship between 2 central concepts in the study of subjective well-being in old age-self-perception of aging (SPA) and physical functioning, and to assess the mediating role of self-efficacy beliefs in this relationship. Methods: Interviews were conducted in the home with 1,216 randomly selected persons aged 75+ years (T1) and repeated with 892 of them 2 years later (T2). We collected data on SPA, physical functioning, self-efficacy, self-rated health, and demographics...
May 25, 2017: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/28548859/separation-of-oil-in-water-emulsions-using-hydrophilic-electrospun-membranes-with-anisotropic-pores
#14
Weerapha Panatdasirisuk, Zhiwei Liao, Thammasit Vongsetskul, Shu Yang
It has been challenging to separate oil from oil/water emulsions with droplet size less than 1 μm using conventional porous membranes. Membranes with small pores are preferred, but the trade-off is a dramatic reduction of volumetric flux. Here, we prepared membranes from electrospun polycaprolactone (PCL) fibers with high porosity (∼88%). When the membranes were stretched uniaxially at different strain levels, the pores became anisotropic with an aspect ratio (pore length/width) up to 5.3 ± 3.0. To improve their wettability, we added Tween 80, a hydrophilic surfactant, to PCL solutions for electrospinning...
May 26, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28548820/preparation-of-microcapsules-containing-benzoyl-peroxide-initiator-with-gelatin-gum-arabic-polyurea-formaldehyde-shell-and-evaluating-their-storage-stability
#15
Maryam Raeesi, S Mojtaba Mirabedini, Ramin R Farnood
This work involves the optimized preparation and characterization of microcapsules which contain benzoyl peroxide (BPO) dispersed in dibutyl phthalate (DBP) with gelatin-gum arabic (Gel-GA)/Polyurea-formaldehyde (PUF) shell. The microcapsules were prepared in two steps using complex coacervation and in situ polymerization techniques, respectively, at various mixing speeds and different core:shell ratios. The scanning electron microscopy (SEM), optical microscopy, and Fourier transform infrared (FTIR) spectroscopy were used for characterization of prepared microcapsules...
May 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28548818/pla-pbat-bionanocomposites-with-antimicrobial-natural-rosin-for-green-packaging
#16
Hesham Moustafa, Nadia El Kissi, Ahmed I Abou-Kandil, Mohamed S Abdel-Aziz, Alain Dufresne
The use of biodegradable polymers is of great importance nowadays in many applications. Some of the most commonly used biopolymers are polylactic acid (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) due to their superior properties and availability. In this manuscript, we use a facile and green modification method of organoclay (OC) by antimicrobial natural rosin which is considered as a toxicity-free reinforcing material, thus keeping the green character of the material. It increases the interlayer spacing between the clay platelets...
May 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28548035/scanning-electron-microscopy-coupled-with-energy-dispersive-spectrometric-analysis-reveals-for-the-first-time-weddellite-and-sylvite-crystals-on-the-surface-of-involucral-bracts-and-petals-of-two-xeranthemum-l-compositae-species
#17
Milan Gavrilović, Suzana Erić, Petar D Marin, Núria Garcia-Jacas, Alfonso Susanna, Pedja Janaćković
In this work, weddellite and sylvite crystals are identified for the first time on the involucral bracts and petals of Xeranthemum annuum and Xeranthemum cylindraceum using scanning electron microscopy coupled with energy dispersive spectrometric (SEM-EDS) analysis. Well-developed crystals of weddellite (CaC2O4·2H2O) occur in the form of a tetragonal bipyramid (hhl), rarely in combination of a bipyramid and tetragonal prism (h00). Indumentum of involucral bracts of X. cylindraceum consists of nonglandular and glandular trichomes...
June 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28546897/structural-properties-and-thermal-stability-of-cobalt-and-chromium-doped-%C3%AE-mno2-nanorods
#18
Romana Cerc Korošec, Polona Umek, Alexandre Gloter, Jana Padežnik Gomilšek, Peter Bukovec
α-MnO2 nanorods were synthesized via the hydrothermal decomposition of KMnO4 in an acidic environment in the presence of Co(2+) and Cr(3+) ions. Reactions were carried out at three different temperatures: 90, 130 and 170 °C. All prepared samples exhibit a tetragonal MnO2 crystalline phase. SEM-EDS analysis shows that cobalt cations are incorporated to a higher degree into the MnO2 framework than chromium ions, and that the content of the dopant ions decreases with increasing reaction temperature. The oxidation of Co(2+) to Co(3+) during the reaction was proved by an XANES study, while EXAFS results confirm that both dopant ions substitute Mn(4+) in the center of an octahedron...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28546332/establishing-177-lu-psma-617-radioligand-therapy-in-a-syngeneic-model-of-murine-prostate-cancer
#19
Wolfgang P Fendler, Andreea D Stuparu, Susan Evans-Axelsson, Katharina Lückerath, Liu Wei, Woosuk Kim, Soumya Poddar, Jonathan Said, Caius G Radu, Matthias Eiber, Johannes Czernin, Roger Slavik, Ken Herrmann
Clinical (177)Lu-PSMA-617 radioligand therapy (RLT) is applied in advanced stage prostate cancer. However, to the best of our knowledge murine models to study the biological effects of various activity levels have not been established. AIM: To optimize specific and total activity for (177)Lu-PSMA-617 RLT in a syngeneic model of murine prostate cancer. Methods: 0.1x106 murine reconstituted, oncogene-driven prostate cancer cells (RM1), transduced to express human prostate-specific membrane antigen (PSMA), were injected into the left flank of C57Bl6 immunocompetent mice...
May 25, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28546119/posterior-bilateral-intermuscular-approach-for-upper-cervical-spine-injuries
#20
Yong Xu, Wei Xiong, SungⅡ Han, Zhong Fang, Feng Li
OBJECTIVE: To investigate a novel intermuscular surgical approach for posterior upper cervical spine fixation. METHODS: Twenty three healthy volunteers underwent MRI imaging. By using the MRI scans in transverse view at the level of lower edge of atlas, the distances from the posterior midline to lateral margin of trapezius (0-T), to the medial margin of splenius capitis (0-Spl), and to middle line of semispinalis capitis (0-Sem) were recorded. The angle between posterior middle line and the line crossing the lateral margin of trapezius and middle point of ipsilateral pedicles...
May 22, 2017: World Neurosurgery
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