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https://www.readbyqxmd.com/read/28651324/preparation-of-activated-carbon-from-molasses-to-ethanol-process-waste-vinasse-and-its-performance-as-adsorbent-material
#1
Omer Kazak, Yasin Ramazan Eker, Haluk Bingol, Ali Tor
Herein, the preparation of activated carbon from waste vinasse by using hydrothermal H2O2 oxidation combined with a two-step pyrolysis process has been described for the first time as a new utilization approach for the waste vinasse. The characterization studies were performed by TGA, FT-IR, Raman spectroscopy, SEM-EDX and gas adsorption measurements. The approach generated a microporous activated carbon with high specific surface area (989m(2)/g) from waste vinasse. After simple experiments on various dye solutions, adsorption performance of the activated carbon was specifically studied on the methylene blue solution as functions of solution pH, contact time, adsorbent amount and reusability...
June 13, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28651323/effect-of-cellulose-as-co-substrate-on-old-landfill-leachate-treatment-using-white-rot-fungi
#2
A Bardi, Q Yuan, G Siracusa, I Chicca, M Islam, F Spennati, V Tigini, S Di Gregorio, D B Levin, G Petroni, G Munz
Conventional wastewater treatment technologies are ineffective for remediation of old LandFill Leachate (LFL), and innovative approaches to achieve satisfactory removal of this recalcitrant fraction are needed. This study focused on old LFL treatment with a selected fungal strain, Bjerkandera adusta MUT 2295, through batch and continuous tests, using packed-bed bioreactors under non-sterile conditions. To optimize the process performance, diverse types of co-substrates were used, including milled cellulose from beverage cups waste material...
June 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28651319/utilization-of-rice-husks-functionalized-with-xanthates-as-cost-effective-biosorbents-for-optimal-cd-ii-removal-from-aqueous-solution-via-response-surface-methodology
#3
Jianhua Qu, Xianlin Meng, Hong You, Xiuqing Ye, Zhaolin Du
Pristine rice husk (RH), a kind of agricultural waste based biosorbent, was chemically modified by introducing sulfur-bearing groups with the CS2 treatment under caustic medium. Using response surface methodology (RSM), the interactive effects of three preparation variables on the cadmium uptake and material yield of xanthate-modified rick husk (RH-X) were investigated, and two quadratic regression models were developed to correlate the preparation parameters to the two responses. Through process optimization, the optimal RH-X was finally obtained under the optimum synthesis conditions (i...
June 13, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28651263/quality-and-dose-optimized-ct-trauma-protocol-recommendation-from-a-university-level-i-trauma-center
#4
Johannes Kahn, David Kaul, Georg Böning, Roman Rotzinger, Patrick Freyhardt, Philipp Schwabe, Martin H Maurer, Diane Miriam Renz, Florian Streitparth
Purpose As a supra-regional level-I trauma center, we evaluated computed tomography (CT) acquisitions of polytraumatized patients for quality and dose optimization purposes. Adapted statistical iterative reconstruction [(AS)IR] levels, tube voltage reduction as well as a split-bolus contrast agent (CA) protocol were applied. Materials and Methods 61 patients were split into 3 different groups that differed with respect to tube voltage (120 - 140 kVp) and level of applied ASIR reconstruction (ASIR 20 - 50 %)...
June 26, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28651262/relationship-of-radiographic-osteoarthritis-severity-with%C3%A2-treatment-outcomes-after-imaging-guided-knee%C3%A2-injections-a-prospective-outcomes-study
#5
Ivan Miletic, Christoph Agten, Reto Sutter, Christian Pfirrmann, Cynthia Peterson
Introduction To be able to predict which patients are more likely to have a positive treatment outcome, the purpose of this study is 1: To compare outcomes after intra-articular corticosteroid knee injections with the Kellgren and Lawrence (KL) 5 and 3 grading systems for knee osteoarthritis, the Osteoarthritis Research Society International (OARSI) grading system and actual joint space measurements; and 2: To compare the reliability of these grading systems. Materials and Methods Knee radiographs of 117 patients who received intra-articular corticosteroid injections were independently evaluated by two radiologists blinded to the outcome...
June 26, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28651261/evaluation-of-the-value-of-contrast-enhanced-ultrasound-ceus-within-radiology-departments-in-germany
#6
Tilmann Graeter, Wolfgang Kratzer, Thomas Seufferlein, Suemeyra Tasdemir, Aylin Senguel, Julian Schmidberger, Hartmut Graeter, Christian Stroszczynski, Meinrad Beer
Purpose Contrast-enhanced ultrasound (CEUS) has been established for many years and has become an increasingly important cornerstone of the diagnostic imaging of various organ systems. However, this modality is rarely performed by radiologists and is primarily employed by other medical disciplines. The goal of this questionnaire study is to present the current value of CEUS in radiology and to encourage reevaluation of the method within this medical discipline. Materials and Methods 560 directors of radiology departments throughout Germany were contacted and given a 3-page questionnaire...
June 26, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28651260/the-cdd-system-in-computed-tomographic-diagnosis-of%C3%A2-diverticular-disease
#7
Daniel Pustelnik, Fabian Henry Jürgen Elsholtz, Christian Bojarski, Bernd Hamm, Stefan Markus Niehues
Purpose This overview sums up the Classification of Diverticular Disease (CDD) with regard to its application in computed tomographic diagnosis and briefly recapitulates its targeted advantages over preliminary systems. Primarily, application of the CDD in computed tomography diagnostics is described. Differences with respect to the categories of the older systems are pointed out on the level of each CDD type using imaging examples. Materials and Methods The presented images are derived from our institute according to the S2k criteria...
June 26, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28651216/ultra-sensitive-suspended-atomically-thin-layered-black-phosphorus-mercury-sensors
#8
Peng Li, Dongzhi Zhang, Chuanxing Jiang, Xiaoqi Zong, Yuhua Cao
The extraordinary properties of black phosphorus (BP) make it a promising candidate for next-generation transistor chemical sensors. However, BP films reported so far are supported on substrate, and substrate scattering drastically deteriorates its electrical properties. Consequentially, the potential sensing capability of intrinsic BP is highly underestimated and its sensing mechanism is masked. Additionally, the optimum sensing regime of BP remains unexplored. This article is the first demonstration of suspended BP sensor operated in subthreshold regime...
June 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28651205/understanding-size-dependent-properties-of-biocl-nanosheets-and-exploring-more-catalysis
#9
Benxia Li, Liangzhi Shao, Baoshan Zhang, Renshan Wang, Mei Zhu, Xiaowei Gu
Investigating the dependence of the catalysis on the size and structure of materials is of great significance for exploiting catalysts with characteristics of high activity, low cost, and new property. Non-precious metal catalysts bear high hope to meet the increasing demands of industrial applications in a cost-effective and environmentally friendly way. In this work, we take size-controlled BiOCl nanosheets as examples, which are synthesized via a hydrothermal method by changing the reaction conditions. The BiOCl nanosheets were characterized in details to understand their size-property relationships, and were found to exhibit a series of thickness-dependent physicochemical properties, including specific surface area, light absorption, and the separation efficiency of photo-generated charge carriers...
June 20, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28651203/carbon-coated-zno-mat-passivation-by-atomic-layer-deposited-hfo2-as-an-anode-material-for-lithium-ion-batteries
#10
Mi-Hee Jung
ZnO has had little consideration as an anode material in lithium-ion batteries compared with other transition-metal oxides due to its inherent poor electrical conductivity and large volume expansion upon cycling and pulverization of ZnO-based electrodes. A logical design and facile synthesis of ZnO with well-controlled particle sizes and a specific morphology is essential to improving the performance of ZnO in lithium-ion batteries. In this paper, a simple approach is reported that uses a cation surfactant and a chelating agent to synthesize three-dimensional hierarchical nanostructured carbon-coated ZnO mats, in which the ZnO mats are composed of stacked individual ZnO nanowires and form well-defined nanoporous structures with high surface areas...
June 20, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28651199/aberration-corrected-stem-by-means-of-diffraction-gratings
#11
Martin Linck, Peter A Ercius, Jordan S Pierce, Benjamin J McMorran
In the past 15 years, the advent of aberration correction technology in electron microscopy has enabled materials analysis on the atomic scale. This is made possible by precise arrangements of multipole electrodes and magnetic solenoids to compensate the aberrations inherent to any focusing element of an electron microscope. Here, we describe an alternative method to correct for the spherical aberration of the objective lens in scanning transmission electron microscopy (STEM) using a passive, nanofabricated diffractive optical element...
June 12, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28651198/the-toxicity-of-cationic-surfactant-hdtma-br-desorbed-from-surfactant-modified-zeolite-towards-faecal-indicator-and-environmental-microorganisms
#12
Peter J Reeve, Howard J Fallowfield
Surfactant Modified Zeolite (SMZ) represents a versatile, cost-effective permeable reactive material, capable of treating multiple classes of contaminants. The potential for HDTMA-Br, a cationic surfactant commonly used to modify zeolite, to desorb from the zeolite surface has been identified as a potential issue for the ongoing use of SMZ in water remediation contexts. This paper investigates the toxicity of HDTMA-Br towards enteric virus surrogates, F-RNA bacteriophage MS2 and E. coli, Bacillus subtilis, and soil microflora...
June 13, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28651184/computational-study-of-structural-optoelectronic-and-nonlinear-optical-properties-of-dynamic-solid-state-chalcone-derivatives
#13
Aijaz Rasool Chaudhry, Ahmad Irfan, Shabbir Muhammad, Abdullah G Al-Sehemi, R Ahmed, Zhang Jingping
In the present study, we use the state of art density functional theory (DFT) techniques to calculate the structural, optoelectronic and nonlinear optical (NLO) properties for two novel chalcone derivatives. The geometrical structures of chalcone derivatives compound 1 and 2 are optimized using periodic boundary conditions (PBC) in solid-state phase as well as isolated single molecular geometry in the gas phase. The reasonable agreement is found among experimental, solid-state and gas phase single molecular geometries, which provide us, further confidence to explore the potential of above-entitled derivatives as good functional materials for electro-optical applications...
May 29, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28651180/does-a-short-term-exposure-to-atrazine-provoke-cellular-senescence-in-chlamydomonas-reinhardtii
#14
Marta Esperanza, Magali Houde, Marta Seoane, Ángeles Cid, Carmen Rioboo
The aim of this study was to investigate the impacts and modes of action of a chemical and nutrient deprivation on the cellular senescence process of Chlamydomonas reinhardtii. Several molecular and cellular parameters related to senescence phenomena were monitored in C. reinhardtii cells exposed for 24h to a sublethal concentration (0.25μM) of the herbicide atrazine and in unexposed 96h cells in an early stationary phase of growth. All endpoints showed the same pattern of response between treatments, except for the intracellular level of calcium, where a significant increase was observed in 24h-exposed cultures compared to 24h-log controls...
June 19, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28651162/antibacterial-activity-corrosion-resistance-and-wear-behavior-of-spark-plasma-sintered-ta-5cu-alloy-for-biomedical-applications
#15
Jing Cui, Liang Zhao, Weiwei Zhu, Bi Wang, Cancan Zhao, Liming Fang, Fuzeng Ren
Tantalum has been widely used in orthopedic and dental implants. However, the major barrier to the extended use of such medical devices is the possibility of bacterial adhesion to the implant surface which will cause implant-associated infections. To solve this problem, bulk Ta-5Cu alloy has been fabricated by a combination of mechanical alloying and spark plasma sintering. The effect of the addition of Cu on the hardness, antibacterial activity, cytocompatibility, corrosion resistance and wear performance was systematically investigated...
June 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28651133/material-flow-and-sustainability-analyses-of-biorefining-of-municipal-solid-waste
#16
Jhuma Sadhukhan, Elias Martinez-Hernandez
This paper presents material flow and sustainability analyses of novel mechanical biological chemical treatment system for complete valorization of municipal solid waste (MSW). It integrates material recovery facility (MRF); pulping, chemical conversion; effluent treatment plant (ETP), anaerobic digestion (AD); and combined heat and power (CHP) systems producing end products: recyclables (24.9% by mass of MSW), metals (2.7%), fibre (1.5%); levulinic acid (7.4%); recyclable water (14.7%), fertiliser (8.3%); and electricity (0...
June 17, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28651132/enhanced-acetone-butanol-ethanol-production-from-lignocellulosic-hydrolysates-by-using-starchy-slurry-as-supplement
#17
Ming Yang, Suvi Kuittinen, Jouko Vepsäläinen, Junhua Zhang, Ari Pappinen
This study aims to improve acetone-butanol-ethanol production from the hydrolysates of lignocellulosic material by supplementing starchy slurry as nutrients. In the fermentations of glucose, xylose and the hydrolysates of Salix schwerinii, the normal supplements such as buffer, minerals, and vitamins solutions were replaced with the barley starchy slurry. The ABE production was increased from 0.86 to 14.7g/L by supplementation of starchy slurry in the fermentation of xylose and the utilization of xylose increased from 29% to 81%...
June 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28651119/experimental-ultrasonic-characterization-of-polyester-based-materials-for-cultural-heritage-applications
#18
Andres Arciniegas, Loic Martinez, Arnaud Briand, Sophie Prieto, Stéphane Serfaty, Nicolas Wilkie-Chancellier
For several years, the Réunion des musées nationaux - Grand-Palais has produced polyester resin reproductions in order to replace marble sculptures that have weakened by outdoor exposure. These objects are made of a complex multilayered polyester composite material including reinforcements to ensure the mechanical strength of the final structure and mineral fillers that allow to imitate the original aesthetics. However, the final structure also weakens because of constant outdoor exposure and ageing. This observation leads today to conduct research related to the structural health monitoring of reproductions for preventive conservation of cultural heritage...
June 17, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28651094/in-vitro-susceptibility-of-brachyspira-hyodysenteriae-to-a-commercial-citrus-fruit-extract
#19
Pedro J G de Nova, Ana Carvajal, Miguel Prieto, Pedro Rubio
Brachyspira hyodysenteriae is the main etiological agent of swine dysentery (SD). Nowadays, treatment and control of SD is increasingly difficult due to the emergence of antimicrobial resistance together with the restrictions on the use of antibiotics in veterinary practice. The aim of this study was to evaluate, as an alternative in the control of this disease, the antimicrobial activity and the main mechanism of action of BIOCITRO, a citrus extract commercialized as raw material and used as feed additive, against B...
June 20, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28651091/loggerhead-sea-turtles-caretta-caretta-a-target-species-for-monitoring-litter-ingested-by-marine-organisms-in-the-mediterranean-sea
#20
Marco Matiddi, Sandra Hochsheid, Andrea Camedda, Matteo Baini, Cristiano Cocumelli, Fabrizio Serena, Paolo Tomassetti, Andrea Travaglini, Stefano Marra, Tommaso Campani, Francesco Scholl, Cecilia Mancusi, Ezio Amato, Paolo Briguglio, Fulvio Maffucci, Maria Cristina Fossi, Flegra Bentivegna, Giuseppe Andrea de Lucia
Marine litter is any persistent, manufactured or processed solid material discarded, disposed of or abandoned in the marine and coastal environment. Ingestion of marine litter can have lethal and sub-lethal effects on wildlife that accidentally ingests it, and sea turtles are particularly susceptible to this threat. The European Commission drafted the 2008/56/EC Marine Strategy Framework Directive with the aim to achieve a Good Environmental Status (GES), and the loggerhead sea turtle (Caretta caretta, Linnaeus 1758) was selected for monitoring the amount and composition of litter ingested by marine animals...
June 23, 2017: Environmental Pollution
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