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https://www.readbyqxmd.com/read/29785597/removal-of-methylene-blue-dye-from-aqueous-solution-using-immobilized-agrobacterium-fabrum-biomass-along-with-iron-oxide-nanoparticles-as-biosorbent
#1
Swati Sharma, Abshar Hasan, Naveen Kumar, Lalit M Pandey
A nano-biosorbent for the removal of methylene blue (MB) was prepared by encapsulating iron oxide nanoparticles (NPs) and Agrobacterium fabrum strain SLAJ731, in calcium alginate. The prepared biosorbent was optimized for the maximum adsorption capacity at pH 11, 160 rpm, and 25 °C. Adsorption kinetics was examined using pseudo-first-order, pseudo-second-order, and intra-particle diffusion (IPD) models. The kinetic data agreed to pseudo-second-order model indicating chemisorption of MB, which was also explained by FTIR analysis...
May 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29785534/an-enzyme-free-homogenous-electrochemical-assay-for-sensitive-detection-of-the-plasmid-mediated-colistin-resistance-gene-mcr-1
#2
Bo Li, Zhixin Chai, Xiaohui Yan, Chunchen Liu, Bo Situ, Ye Zhang, Weilun Pan, Shihua Luo, Jianhua Liu, Lei Zheng
Antibiotic resistance associated with the mcr-1 gene of Gram-negative bacteria, which confers resistance to drugs of last resort and has the potential to spread via plasmids, is one of the most pressing issues facing global health today. Point-of-care testing for the mcr-1 gene is needed to aid in the identification of colistin resistance in the field and to control its horizontal transmission. Here, we report the successful development of an enzyme-free homogenous electrochemical strategy for sensitive detection of the antibiotic resistance gene mcr-1 using the hybridization chain reaction and mcr-1-specific toehold probe...
May 22, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29785456/methylene-blue-fluorescence-of-the-ureter-during-colorectal-surgery
#3
Thomas G Barnes, Roel Hompes, Jacqueline Birks, Neil J Mortensen, Oliver Jones, Ian Lindsey, Richard Guy, Bruce George, Chris Cunningham, Trevor M Yeung
BACKGROUND: Iatrogenic ureteric injury is a serious complication of colorectal surgery. Incidence is estimated to be between 0.3 and 1.5%. Of all ureteric injuries, 9% occur during colorectal procedures. Ureteric stents are utilised as a method to reduce the risk of injury; however, these are not without risk and do not guarantee prevention of injury. Fluorescence is a safe and effective alternative for intraoperative ureteric localisation. This proof of principle study aims to assess the use of methylene blue to fluoresce the ureter during colorectal surgery...
May 21, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29785291/using-novel-technology-to-augment-complex-video-assisted-thoracoscopic-single-basilar-segmentectomy
#4
Zaid M Abdelsattar, Shanda H Blackmon
There are many novel technologies that enable complex segmentectomy to be performed. As lung cancer screening becomes more prevalent, patients are increasingly diagnosed with early stage lung cancer, multifocal disease, and second primary tumors. This shift to an earlier clinical presentation combined with advances in technology and an emphasis on minimally invasive techniques have led to the current developments we are now seeing with anatomic segmentectomy. In this paper, we describe the operative technique of an indocyanine green (ICG)-guided video-assisted thoracoscopic surgery (VATS) single basilar segmental resection, augmented with methylene blue dye marker localization via SuperDimension electromagnetic navigational bronchoscopy...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29784883/cytochrome-bd-oxidase-has-an-important-role-in-sustaining-growth-and-development-of-streptomyces-coelicolor-a3-2-under-oxygen-limiting-conditions
#5
Marco Fischer, Dörte Falke, Carolin Naujoks, R Gary Sawers
Streptomyces coelicolor A3 (2) is a filamentously growing, spore-forming, obligately aerobic actinobacterium that uses both a copper- aa3 - type cytochrome c oxidase and a cytochrome bd oxidase to respire oxygen. Using defined knock-out mutants we demonstrated that either of these terminal oxidases was capable of allowing the bacterium to grow and complete its developmental cycle. The genes encoding the bcc complex and the aa3 oxidase are clustered at a single locus. Using western blot analyses we showed that the bcc-aa3 oxidase branch is more prevalent than the bd oxidase in spores...
May 21, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29781501/photoinduced-interfacial-charge-separation-dynamics-in-zeolitic-imidazolate-framework
#6
Brian Pattengale, Jier Huang
Owing to their porous structure and tunable framework, zeolitic imidazolate frameworks (ZIFs) have garnered considerable attention as promising photocatalytic materials. However, little is known regarding their photophysical properties. In this work, we report the photoinduced charge separation dynamics in a ZIF-67 thin film through interfacial electron transfer (ET) to methylene blue (MB+) via ultrafast transient absorption spectroscopy. We show that the ET process occurs through two distinct pathways, including an ultrafast (<200 fs) process from the [CoII(mim)2] units located on the surface of ZIF-67 film that are directly in contact with MB+ and a relatively slower ET process with a 101...
May 21, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29778038/hierarchically-three-dimensional-3d-nanotubular-sea-urchin-shaped-iron-oxide-and-its-application-in-heavy-metal-removal-and-solar-induced-photocatalytic-degradation
#7
Soon Chang Lee, Yesul Jeong, Youn Jung Kim, Hyeran Kim, Hyun Uk Lee, Young-Chul Lee, Sang Moon Lee, Hae Jin Kim, Ha-Rim An, Myoung Gyu Ha, Go-Woon Lee, Young-Seak Lee, Gaehang Lee
In this study, hierarchically three-dimensional (3D) nanotubular sea urchin-shaped iron oxide nanostructures (3D-Fe2 O3 ) were synthesized by a facile and rapid ultrasound irradiation method. Additives, templates, inert gas atmosphere, pH regulation, and other complicated procedures were not required. Dense 3D-Fe2 O3 with a relatively large Brunauer-Emmett-Teller (BET) surface area of 129.4 m2 /g was synthesized within 23 min, and the BET surface area was further improved to 282.7 m2 /g by a post heat-treatment process...
April 23, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29777732/antinociceptive-effect-of-tadalafil-in-various-pain-models-involvement-of-opioid-receptors-and-nitric-oxide-cyclic-gmp-pathways
#8
Mohammad M Mehanna, Souraya Domiati, Hania Nakkash Chmaisse, Ahmed El Mallah
Nitric oxide has been proven to play an important role in nociception, accordingly, its promoters, phosphodiesterase inhibitors have been investigated as pain response modulators. Aiming to evaluate the central effect of tadalafil, a phosphodiesterase 5 inhibitor, and to determine its EC50, tail flick and hot plate tests were utilized. On the other hand, its nociceptive peripheral analgesic effect was assessed through acetic-acid induced writhing model. Formalin test was used to appraise both non-inflammatory and inflammatory pain responses...
May 16, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29775099/the-use-of-olive-tree-pruning-waste-compost-to-sequestrate-methylene-blue-dye-from-aqueous-solution
#9
Ioannis Anastopoulos, Ilias Margiotoudis, Ioannis Massas
Considering that quality water supplies are diminishing and climate disorder affects water cycle, wastewaters should be decontaminated for reuse either by the same establishment or in agriculture for the growth of industrial plants. In that context, much research work has been focused on the development of low cost biosorbents. In this study, the effect of composting on the adsorption capacity of olive tree pruning waste (OTPW) biomass for methylene blue (MB) removal from aqueous solutions was examined. Composting procedure may improve the sorption properties of the raw organic materials, is economical and easy to apply...
July 3, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29774318/biological-subtypes-of-breast-cancer-and-sentinel-lymph-node-biopsy
#10
Muhammet Kadri Çolakoğlu, Erhan Güven, Gökhan Giray Akgül, Lütfi Doğan, Mehmet Ali Gülçelik
Objective: Breast cancer subtypes are used as prognostic and predictive factors considering the genomic profile of the disease. This study is designed to investigate the Sentinel Lymph Node (SLN) detection rate in breast cancer for different biological characteristics. Material and Methods: Patients on whom we performed the methylene blue method alone were named as Group I, radiocolloid substance method alone as Group II and both methylene blue and radiocolloid method as Group III...
April 2018: European Journal of Breast Health
https://www.readbyqxmd.com/read/29773347/lipophilic-methylene-blue-analogues-enhance-mitochondrial-function-and-increase-frataxin-levels-in-a-cellular-model-of-friedreich-s-ataxia
#11
Omar M Khdour, Indrajit Bandyopadhyay, Sandipan Roy Chowdhury, Nishant P Visavadiya, Sidney M Hecht
Friedreich's ataxia (FRDA) is an autosomal recessive neurodegenerative disorder resulting from reduced expression of the protein frataxin (FXN). Although its function is not fully understood, frataxin appears to help assemble iron sulfur clusters; these are critical for the function of many proteins, including those needed for mitochondrial energy production. Finding ways to increase FXN levels has been a major therapeutic strategy for this disease. Previously, we described a novel series of methylene violet analogues and their structural optimization as potential therapeutic agents for neurodegenerative and mitochondrial disorders...
May 4, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29772413/self-templating-synthesis-of-hollow-copper-tungstate-spheres-as-adsorbents-for-dye-removal
#12
Jing-Feng Li, Yibo Chen, Zhu Wang, Zhao-Qing Liu
In spite of recent progress in developing hollow micro/nanostructures, the synthesis of three-dimensional adsorbents with high adsorption efficiency and capability on the basis of these structures still remains a great challenge. Herein, we demonstrate a facile hydrothermal strategy to synthesize uniformly dispersed hollow CuWO4 spheres. The as-prepared CuWO4 spheres with unique mesoporous structure show favorable selective adsorption for cationic dyes and good recyclability. The adsorption capacity of hollow CuWO4 towards methylene blue (MB) reaches 59...
May 11, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29772341/development-of-an-auto-phase-separable-and-reusable-graphene-oxide-potato-starch-based-cross-linked-bio-composite-adsorbent-for-removal-of-methylene-blue-dye
#13
Amartya Bhattacharyya, Bhaskar Banerjee, Soumitra Ghorai, Dipak Rana, Indranil Roy, Gunjan Sarkar, Nayan Ranjan Saha, Sriparna De, Tapas Kumar Ghosh, Sourav Sadhukhan, Dipankar Chattopadhyay
In this work, we report the development of a cross-linked bio-composite consisting of graphene oxide, potato starch, cross-linker glutaraldehyde and its application to adsorption of the industrial dye, methylene blue, from aqueous solution. The inexpensiveness, non-hazardous nature and easy bio-degradability are the major reasons for the selection of starch material as one of the components of the bio-composite. The bio-composite has been characterized by FTIR, SEM, XRD, particle size and zeta potential analysis...
May 14, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29771438/methylene-blue-attenuates-renal-ischemia-reperfusion-injury-by-negative-regulation-of-nlrp3-signaling-pathway
#14
J-J Liu, L Lu, F-Q Hu, H Yuan, Q Xu, Y-F Qin, J-H Gong
OBJECTIVE: To investigate the effect of methylene blue (MB) on renal ischemia-reperfusion (IR) injury in mice and its possible relevant mechanisms. MATERIALS AND METHODS: A total of 30 male C57/BL6 mice aged 4 months old were randomly divided into the following three groups: Sham group (n=10), IR group (n=10), and MB group (n=10). Mice in MB group were treated with gavage continuously using methylene blue solution (dosage: 25 mg·kg-1·d-1) until they were 7 months old...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29770942/facile-preparation-of-nitrogen-and-sulfur-co-doped-graphene-based-aerogel-for-simultaneous-removal-of-cd-2-and-organic-dyes
#15
Qiaoping Kong, Chaohai Wei, Sergei Preis, Yun Hu, Feng Wang
The need in simultaneous removal of heavy metals and organic compounds dictates the development of synthetic adsorbents with tailor-made properties. A nitrogen (N) and sulfur (S) co-doped graphene-based aerogel (GBA) modified with 2,5-dithiobisurea was synthesized hydrothermally for simultaneous adsorption of Cd2+ and organic dyes-safranin-O (SO), crystal violet (CV), and methylene blue (MB). 2,5-Dithiobisurea was used as nitrogen and sulfur sources to introduce N and S-containing functional group onto graphene oxide...
May 17, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29769549/detection-of-chikungunya-virus-dna-using-two-dimensional-mos-2-nanosheets-based-disposable-biosensor
#16
Chaitali Singhal, Manika Khanuja, Nahid Chaudhary, C S Pundir, Jagriti Narang
Development of platforms for a reliable, rapid, sensitive and selective detection of chikungunya virus (CHIGV) is the need of the hour in developing countries. To the best of our knowledge, there are no reports available for the electrochemical detection of CHIGVDNA. Therefore, we aim at developing a biosensor based on molybdenum disulphide nanosheets (MoS2 NSs) for the point-of-care diagnosis of CHIGV. Briefly, MoS2 NSs were synthesized by chemical route and characterized using scanning electron microscopy, transmission electron microscopy, UV-Vis spectroscopy, Raman spectroscopy and X-Ray Diffraction...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29768892/green-synthesis-characterization-and-catalytic-activity-of-gold-nanoparticles-prepared-using-rosmarinic-acid
#17
Soo Hyeon Lim, Youmie Park
Green strategies to synthesize gold nanoparticles have attracted a substantial amount of attention because global sustainability is a focal issue in many research areas. In the present study, rosmarinic acid was utilized as a reducing agent to reduce gold ions to gold nanoparticles. The characteristic surface plasmon resonance of gold nanoparticles was observed at 532 nm with a pink-colored colloidal solution. High-resolution transmission electron microscopy (HR-TEM) revealed the presence of spherical nanoparticles along with triangular nanoplates...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768888/effect-of-surfactants-on-the-structure-and-adsorption-efficiency-of-hydroxyapatite-nanorods
#18
Manisha Sharma, Amit Mishra, Akansha Mehta, Diptiman Choudhury, Soumen Basu
Porous hydroxyapatite (HAp) nanorods using surfactant templating proceeded via microwave irradiation method. Study of BET surface area measurement of the HAp nanorods showed that surface area of HAp nanorods with a mixture of cat-anionic surfactants was higher (56.16 m2/g) than their individual counterpart (for anionic 52.8 m2/g and for cationic 48.8 m2/g) as well as without surfactant (19.07 m2/g) due to higher synergistic effect and low critical aggregation concentration of the mixture. Surfactant-directed synthesis of porous HAp has been explored in literature, but the relation between the pore size distribution, surface area and morphology and choice of surfactant(s) was not fully understood and hence in this work we have explored those parameters...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768826/cdse-pvp-qds-for-degradation-of-methylene-blue-via-photocatalytic-oxidative-cleavage-under-mild-visible-light
#19
Pawan K Khanna, Abhishek Kumar, Anuraj Kshirsagar, Chaitanya Hiragond
Present article describes, synthesis of polyvinyl pyrrolidone (PVP) capped CdSe quantum dots (QDs) at pH 5, 7 and 9 under controlled atmosphere. Spherical CdSe QDs in the size domain of 2 nm to 10 nm revealed cubic crystal structure from XRD analysis. The CdSe QDs synthesized at pH 7 showed highest specific surface area as compared to those synthesized at pH 5 and 9. The photocatalytic activity of CdSe QDs was investigated against methylene blue (MB) in aqueous solution of different concentrations (5, 10 and 20 ppm) under irradiation of mild visible light (8 W lamp)...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29768248/bisphenol-a-decreases-the-spontaneous-contractions-of-rat-uterus-in-vitro-through-a-nitrergic-mechanism
#20
Hemlata Gupta, Shripad B Deshpande
BACKGROUND: Bisphenol A (BPA), a chemical used in the manufacture of plastics, has toxic effects on various systems of the human body including the reproductive system. BPA possesses estrogenic activity and is implicated in altering oogenesis, ovulation, and fertility. In addition to ovulatory changes, uterine contractility is an important factor for fertility. However, the effects of BPA on myometrial contractions are not known. Therefore, we examined the effect of BPA on rat uterine contractions...
May 16, 2018: Journal of Basic and Clinical Physiology and Pharmacology
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