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https://www.readbyqxmd.com/read/28671824/exclusive-extracellular-bioreduction-of-methyl-orange-by-azo-reductase-free-geobacter-sulfurreducens
#1
Yi-Nan Liu, Feng Zhang, Jie Li, Dao-Bo Li, Dong-Feng Liu, Wen-Wei Li, Han-Qing Yu
Azo dyes are a class of recalcitrant organic pollutants causing severe environmental pollution. For their biodecolorization, the azo reductase system was considered as the major molecular basis in bacteria. However, the intracellular localization of azo reductase limits their function for efficient azo dye decolorization. This limitation may be circumvented by electrochemically active bacteria (EAB) which is capable of extracellular respiration. To verify the essential role of extracellular respiration in azo dye decolorization, Geobacter sulfurreducens PCA, a model EAB, was used for the bioreduction of methyl orange (MO), a typical azo dye...
July 3, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28647320/an-integrated-aerobic-anaerobic-strategy-for-performance-enhancement-of-pseudomonas-aeruginosa-inoculated-microbial-fuel-cell
#2
Xiao-Yu Yong, Zhi-Ying Yan, Hai-Bo Shen, Jun Zhou, Xia-Yuan Wu, Li-Juan Zhang, Tao Zheng, Min Jiang, Ping Wei, Hong-Hua Jia, Yang-Chun Yong
Microbial fuel cell (MFC) is a promising device for energy generation and organic waste treatment simultaneously by electrochemically active bacteria (EAB). In this study, an integrated aerobic-anaerobic strategy was developed to improve the performance of P. aeruginosa-inoculated MFC. With an aerobic start-up and following an anaerobic discharge process, the current density of MFC reached a maximum of 99.80µA/cm(2), which was 91.6% higher than the MFC with conventional constant-anaerobic operation. Cyclic voltammetry and HPLC analysis showed that aerobic start-up significantly increased electron shuttle (pyocyanin) production (76% higher than the constant-anaerobic MFC)...
October 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28638375/valorization-of-spent-escherichia-coli-media-using-green-microalgae-chlamydomonas-reinhardtii-and-feedstock-production
#3
Jian-Guo Zhang, Fang Zhang, Kiran Thakur, Fei Hu, Zhao-Jun Wei
The coupling of Chlamydomonas reinhardtii biomass production for nutrients removal of Escherichia coli anaerobic broth (EAB) is thought to be an economically feasible option for the cultivation of microalgae. The feasibility of growing microalgae in using EAB high in nutrients for the production of more biomass was examined. EAB comprised of nutrient-abundant effluents, which can be used to produce microalgae biomass and remove environment pollutant simultaneously. In this study, C. reinhardtii 21gr (cc1690) was cultivated in different diluted E...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28624619/quorum-sensing-signals-enhance-the-electrochemical-activity-and-energy-recovery-of-mixed-culture-electroactive-biofilms
#4
Shanshan Chen, Xianyue Jing, Jiahuan Tang, Yanlun Fang, Shungui Zhou
The impacts of exogenous or endogenous quorum sensing (QS) signaling molecules on mixed-culture electroactive biofilms (EABs), especially extracellular polymeric substances (EPS) and exoelectrogens using direct electron transfer mechanism inside EABs are poorly understood. This research focuses on the influence of acylhomoserine lactones (AHLs), the most common QS signaling molecules for gram negative bacteria, on mixed-culture EABs. Results indicated that both exogenous and endogenous AHLs played the role as regulators to improve the electrochemical activities of EABs...
June 13, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28619638/development-and-characterization-of-cuttlefish-sepia-officinalis-skin-gelatin-protein-isolate-blend-films
#5
Hela Kchaou, Mourad Jridi, Ola Abdelhedi, Benbettaïeb Nasreddine, Thomas Karbowiak, Moncef Nasri, Frédéric Debeaufort
In the present study, cuttlefish skin gelatin (CSG) and protein isolate (CSPI) blend films were prepared and their physicochemical and antioxidant properties were characterized. CSG (4%, w/v) was blended with CSPI (3%, w/v) at different ratios and 15% of glycerol (w/w, plasticizer/polymer dry matter). Results showed that increasing of CSPI content induced lower lightness but higher redness, yellowness and color difference values compared to CSG film. In addition, CSPI film had the lowest tensile strength (TS) and elongation at break (EAB) values...
June 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28594183/the-opposite-effect-of-water-and-n-methyl-2-pyrrolidone-cosolvents-on-the-nanostructural-organization-of-ethylammonium-butanoate-ionic-liquid-a-small-and-wide-angle-x-ray-scattering-and-molecular-dynamics-simulations-study
#6
Umme Salma, Natalia V Plechkova, Ruggero Caminiti, Lorenzo Gontrani
Two series of mixtures of ethylammoniumbutanoate (EAB, [N0 0 0 2][C3CO2]) in water and N-methyl-2-pyrrolidone (NMP) have been prepared at different molar fractions to assess the effect of these two polar solvents on the nanostructural order present in [N0 0 0 2][C3CO2]. The small- and wide-angle X-ray scattering (SWAXS) pattern of the liquid in neat state shows a prepeak at Q = 0.513 Å(-1), which is associated with the aggregation of nonpolar alkyl chains of both cations and anions. Interestingly, the two solvents affect the nanostructure of [N0 0 0 2][C3CO2] differently, though both are polar...
June 26, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28571278/applicability-of-the-cielab-and-ciede2000-formulae-for-detection-of-colour-changes-in-colour-changeable-chewing-gum-for-evaluating-masticatory-function
#7
Yesiboli Yeerken, Takafumi Otomaru, Mohamed Said, Na Li, Hisashi Taniguchi
INTRODUCTION: Mastication is one of the essential stomatognathic functions and is impaired when mandibulectomy is performed for removal of head and neck lesions. AIM: The purpose of this study was to investigate the correlation between perceived chewing ability {Masticatory Score (MS)} and objective mixing ability (∆E) in patients who had undergone marginal mandibulectomy. MATERIALS AND METHODS: Twenty normal dentate subjects as control group and twenty mandibulectomy patients who had undergone marginal mandibulectomy and wearing a dentomaxillary prosthesis were enrolled...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28511349/brown-and-black-carbon-in-beijing-aerosol-implications-for-the-effects-of-brown-coating-on-light-absorption-by-black-carbon
#8
Yuan Cheng, Ke-Bin He, Guenter Engling, Rodney Weber, Jiu-Meng Liu, Zhen-Yu Du, Shu-Ping Dong
Brown carbon (BrC) is increasingly included in climate models as an emerging category of particulate organic compounds that can absorb solar radiation efficiently at specific wavelengths. Water-soluble organic carbon (WSOC) has been commonly used as a surrogate for BrC; however, it only represents a limited fraction of total organic carbon (OC) mass, which could be as low as about 20% in urban atmosphere. Using methanol as the extraction solvent, up to approximately 90% of the OC in Beijing aerosol was isolated and measured for absorption spectra over the ultraviolet-to-visible wavelength range...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28483618/perigraft-seroma-after-extra-anatomic-bypass-case-series-and-review-of-the-literature
#9
REVIEW
Daniele Bissacco, Maurizio Domanin, Silvia Romagnoli, Livio Gabrielli
AIM: extra-anatomic bypass (EAB) remains a viable alternative for lower limbs revascularization if aorto-bifemoral bypass and endovascular therapy are contraindicated. Among EAB, periprosthetic seroma (PS) occurs in about 4% of cases. Diagnostic and therapeutic management, as well as standardized treatment paradigm, are still not well defined. The aim of this study is to report 5 PS cases in EAB and to review literature about similar cases. METHODS: We retrospectively reviewed EAB performed during the period 2002-2015...
May 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28424161/response-and-progression-on-midostaurin-in-advanced-systemic-mastocytosis-kit-d816v-and-other-molecular-markers
#10
Mohamad Jawhar, Juliana Schwaab, Nicole Naumann, Hans-Peter Horny, Karl Sotlar, Torsten Haferlach, Georgia Metzgeroth, Alice Fabarius, Peter Valent, Wolf-Karsten Hofmann, Nicholas C P Cross, Manja Meggendorfer, Andreas Reiter
In advanced systemic mastocytosis (advSM), disease evolution is often triggered by KIT mutations (D816V in >80% of cases) and by additional mutations (eg, in SRSF2, ASXL1, and/or RUNX1 [S/A/R(pos) in >60% of cases]). In a recently reported phase 2 study, midostaurin, a multikinase/KIT inhibitor, demonstrated an overall response rate (ORR) of 60% in advSM but biomarkers predictive of response are lacking. We evaluated the impact of molecular markers at baseline and during follow-up in 38 midostaurin-treated advSM patients...
July 13, 2017: Blood
https://www.readbyqxmd.com/read/28412621/xanthium-strumarium-l-seed-hull-as-a-zero-cost-alternative-for-rhodamine-b-dye-removal
#11
Shraddha Khamparia, Dipika Kaur Jaspal
Treatment of polluted water has been considered as one of the most important aspects in environmental sciences. Present study explores the decolorization potential of a low cost natural adsorbent Xanthium strumarium L. seed hull for the adsorption of a toxic xanthene dye, Rhodamine B (RHB). The characterization of the adsorbent revealed the presence of high amount of carbon, when exposed to Electron Dispersive Spectroscopy (EDS). Further appreciable decolorization took place which was confirmed by Fourier Transform Infrared Spectroscopy (FTIR) analysis noticing shift in peaks...
April 13, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28334923/validated-rp-hplc-dad-method-for-the-quantification-of-insect-repellent-ethyl-2-aminobenzoate-in-membrane-moderated-matrix-type-monolithic-polymeric-device
#12
Johirul Islam, Kamaruz Zaman, Srijita Chakrabarti, Nilutpal Sharma Bora, Santa Mandal, Manash Pratim Pathak, Pakalapati Srinivas Raju, Pronobesh Chattopadhyay
A simple, accurate and sensitive reversed-phase high-performance liquid chromatographic (RP-HPLC) method has been developed for the estimation of ethyl 2-aminobenzoate (EAB) in a matrix type monolithic polymeric device and validated as per the International Conference on Harmonization guidelines. The analysis was performed isocratically on a ZORBAX Eclipse plus C18 analytical column (250 × 4.4 mm, 5 μm) and a diode array detector (DAD) using acetonitrile and water (75:25 v/v) as the mobile phase by keeping the flow-rate constant at 1...
July 1, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28273578/polarity-inversion-of-bioanode-for-biocathodic-reduction-of-aromatic-pollutants
#13
Hui Yun, Bin Liang, De-Yong Kong, Hao-Yi Cheng, Zhi-Ling Li, Ya-Bing Gu, Hua-Qun Yin, Ai-Jie Wang
The enrichment of specific pollutant-reducing consortium is usually required prior to the startup of biocathode bioelectrochemical system (BES) and the whole process is time consuming. To rapidly establish a non-specific functional biocathode, direct polar inversion from bioanode to biocathode is proposed in this study. Based on the diverse reductases and electron transfer related proteins of anode-respiring bacteria (ARB), the acclimated electrochemically active biofilm (EAB) may catalyze reduction of different aromatic pollutants...
February 27, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28255172/reaching-back-the-relative-strength-of-the-retroactive-emotional-attentional-blink
#14
Áine Ní Choisdealbha, Richard M Piech, John K Fuller, David H Zald
Visual stimuli with emotional content appearing in close temporal proximity either before or after a target stimulus can hinder conscious perceptual processing of the target via an emotional attentional blink (EAB). This occurs for targets that appear after the emotional stimulus (forward EAB) and for those appearing before the emotional stimulus (retroactive EAB). Additionally, the traditional attentional blink (AB) occurs because detection of any target hinders detection of a subsequent target. The present study investigated the relations between these different attentional processes...
March 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28214586/mango-kernel-starch-gum-composite-films-physical-mechanical-and-barrier-properties
#15
Anjum Nawab, Feroz Alam, Muhammad Abdul Haq, Zubala Lutfi, Abid Hasnain
Composite films were developed by the casting method using mango kernel starch (MKS) and guar and xanthan gums. The concentration of both gums ranged from 0% to 30% (w/w of starch; db). Mechanical properties, oxygen permeability (OP), water vapor permeability (WVP), solubility in water and color parameters of composite films were evaluated. The crystallinity and homogeneity between the starch and gums were also evaluated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The scanning electron micrographs showed homogeneous matrix, with no signs of phase separation between the components...
May 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28163130/improved-thermal-stability-and-mechanical-properties-of-type-i-collagen-by-crosslinking-with-casein-keratin-and-soy-protein-isolate-using-transglutaminase
#16
Xiaomeng Wu, Yaowei Liu, Anjun Liu, Wenhang Wang
The inferior thermal- stability of collagen hinders its extensive application in food industry, including edible packaging. To improve the thermal- stability and mechanical properties of collagen, we attempted to crosslink collagen with some proteins possessing excellent thermal stability (i. e., casein, keratin and soy protein isolate (SPI)). Observed from the SDS- PAGE and particle size distribution, some complexes with higher molecule weight and relative bigger size particle occurred in the protein mixture, especially after TGase crosslinking...
May 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28107618/carbon-hollow-microspheres-with-a-designable-mesoporous-shell-for-high-performance-electromagnetic-wave-absorption
#17
Hailong Xu, Xiaowei Yin, Meng Zhu, Meikang Han, Zexin Hou, Xinliang Li, Litong Zhang, Laifei Cheng
In this work, mesoporous carbon hollow microspheres (PCHMs) with designable mesoporous shell and interior void are constructed by a facile in situ stöber templating approach and a pyrolysis-etching process. The PCHMs are characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectra, Raman spectroscopy, and nitrogen adsorption and desorption system. A uniform mesoporous shell (pore size 4.7 nm) with a thickness of 55 nm and a cavity size of 345 nm is realized. The composite of paraffin mixed with 20 wt % PCHMs exhibits a minimum reflection coefficient (RCmin) of -84 dB at 8...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28077134/endoscopy-assisted-surgery-for-the-management-of-benign-breast-tumors-technique-learning-curve-and-patient-reported-outcome-from-preliminary-323-procedures
#18
Hung-Wen Lai, Hui-Yu Lin, Shu-Ling Chen, Shou-Tung Chen, Dar-Ren Chen, Shou-Jen Kuo
BACKGROUND: Endoscopy-assisted breast surgery (EABS), a technique that optimizes cosmetic outcome because it is performed through small wounds hidden in inconspicuous areas, could be an alternative surgical technique for benign breast tumors. In this study, we report the preliminary results of 323 EABS procedures performed at our institution for the management of benign breast tumors. METHODS: The medical records of patients who underwent EABS for benign breast lesions during the periods August 2010 to December 2015 were collected from the Changhua Christian Hospital EABS database...
January 11, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28034703/hybrid-treatment-expanding-the-armamentarium-for-infected-infrarenal-abdominal-aortic-and-iliac-aneurysms
#19
Kichang Han, Do Yun Lee, Man-Deuk Kim, Sak Lee, Jong Yun Won, Joon Ho Kwon, Donghoon Choi, Young-Guk Ko
PURPOSE: To investigate safety and efficacy of hybrid treatment for infected aortic and iliac aneurysms. MATERIALS AND METHODS: Between July 2007 and May 2011, hybrid treatment was performed in 6 male patients (mean age, 67.7 y; range, 57-76 y). Hybrid treatment consisted of extraanatomic bypass (EAB) and isolation of infected aneurysm with vascular plugs. Aneurysms were divided into primary and secondary infected aneurysms. Primary infected aneurysm refers to an aneurysm arising from bacterial infection of the native arterial wall; secondary infected aneurysm refers to infection involving an aneurysm that was previously treated with graft placement...
December 26, 2016: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/27996090/eco-friendly-biorefractory-films-of-gelatin-and-tempo-oxidized-cellulose-ester-for-food-packaging-application
#20
Chen Zhuang, Furong Tao, Yuezhi Cui
BACKGROUND: In recent years, many types of food-packaging films and composites have been prepared using gelatin because of its good film-forming ability, non-toxic nature and cost-effectiveness. However, the relatively weak thermal stability, poor mechanical properties and easily-degradable quality limit the potential application of gelatin as a practical material. Microcrystalline cellulose (MCC), which comprises one of the most abundant biomass resources, has been regarded as a safe and reliable food additive because it has the same ingredients as the cellulose in people's daily intake...
December 20, 2016: Journal of the Science of Food and Agriculture
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