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https://www.readbyqxmd.com/read/27901319/salt-templating-with-pore-padding-hierarchical-pore-tailoring-towards-functionalised-porous-carbons
#1
K Vasanth Kumar, Srinivas Gadipelli, Kathrin Preuss, Harshit Porwal, Tingting Zhao, Zheng Xiao Guo, Maria-Magdalena Titirici
We propose a new synthetic route towards nanoporous functional carbon materials based on salt templating with pore-padding approach (STPP). STPP relies on the use of a pore-padding agent that undergoes an initial polymerisation/ condensation process prior to the formation of a solid carbon framework. The pore-padding agent allows tailoring hierarchically the pore-size distribution and controlling the amount of heteroatom (nitrogen in this case) functionalities as well as the type of nitrogen (graphitic, pyridinic, oxides of nitrogen) incorporated within the carbon framework in a single-step-process...
November 30, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27900434/combination-of-microbiological-spectroscopic-and-molecular-docking-techniques-to-study-the-antibacterial-mechanism-of-thymol-against-staphylococcus-aureus-membrane-damage-and-genomic-dna-binding
#2
Lang-Hong Wang, Zhi-Hong Zhang, Xin-An Zeng, De-Ming Gong, Man-Sheng Wang
Thymol (2-isopropyl-5-methylphenol) is a natural ingredient used as flavor or preservative agent in food products. The antibacterial mechanism of thymol against Gram-positive, Staphylococcus aureus was investigated in this work. A total of 15 membrane fatty acids were identified in S. aureus cells by gas chromatography-mass spectrometry. Exposure to thymol at low concentrations induced obvious alterations in membrane fatty acid composition, such as decreasing the proportion of branched 12-methyltetradecanoic acid and 14-methylhexadecanoic acid (from 22...
November 29, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27899298/mechanisms-and-time-course-of-menthol-induced-cutaneous-vasodilation
#3
Daniel H Craighead, Nathaniel B McCartney, James H Tumlinson, Lacy M Alexander
Menthol is a vasoactive compound that is widely used in topical analgesic agents. Menthol induces cutaneous vasodilation, however the underlying mechanisms are unknown. Determining the rates of appearance and clearance of menthol in the skin is important for optimizing topical treatment formulation and dosing. The purpose of this study was to determine the mechanisms contributing to menthol-mediated cutaneous vasodilation and to establish a time course for menthol appearance/clearance in the skin. Ten young (23±1years, 5 males 5 females) subjects participated in two protocols...
November 26, 2016: Microvascular Research
https://www.readbyqxmd.com/read/27894293/lung-bioengineering-physical-stimuli-and-stem-progenitor-cell-biology-interplay-towards-biofabricating-a-functional-organ
#4
REVIEW
Paula N Nonaka, Juan J Uriarte, Noelia Campillo, Vinicius R Oliveira, Daniel Navajas, Ramon Farré
A current approach to obtain bioengineered lungs as a future alternative for transplantation is based on seeding stem cells on decellularized lung scaffolds. A fundamental question to be solved in this approach is how to drive stem cell differentiation onto the different lung cell phenotypes. Whereas the use of soluble factors as agents to modulate the fate of stem cells was established from an early stage of the research with this type of cells, it took longer to recognize that the physical microenvironment locally sensed by stem cells (e...
November 28, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27892815/monitoring-trihalomethanes-and-nitrogenous-disinfection-by-products-in-blending-desalinated-waters-using-solid%C3%A2-phase-microextraction-and-gas-chromatography
#5
Providencia González-Hernández, Manuel Hernández-Padrón, Verónica Pino, Ana M Afonso, Juan H Ayala
A simple and efficient method has been developed for the extraction and determination of sixteen common volatile halogenated disinfection by-products (DBPs) in blending desalinated waters, using headspace solid-phase microextraction and gas chromatography with flame-ionization detection (HS-SPME/GC-FID). The DBPs determined included 4 trihalomethanes, 6 haloacetonitriles and 6 halonitromethanes. After the optimization using factorial designs of the HS-SPME parameters (optimum: carboxen/polydimethylsiloxane (CAR/PDMS) fiber, extraction time of 60 min at 30 °C, pH 7, addition of 40% (w/v) of sodium chloride, and desorption time of 2 min at 250 °C), quantification limits ranged from 3...
November 28, 2016: Environmental Technology
https://www.readbyqxmd.com/read/27891116/complete-genome-sequence-of-clostridium-estertheticum-dsm-8809-a-microbe-identified-in-spoiled-vacuum-packed-beef
#6
Zhongyi Yu, Lynda Gunn, Evan Brennan, Rachael Reid, Patrick G Wall, Peadar Ó Gaora, Daniel Hurley, Declan Bolton, Séamus Fanning
Blown pack spoilage (BPS) is a major issue for the beef industry. Etiological agents of BPS involve members of a group of Clostridium species, including Clostridium estertheticum which has the ability to produce gas, mostly carbon dioxide, under anaerobic psychotrophic growth conditions. This spore-forming bacterium grows slowly under laboratory conditions, and it can take up to 3 months to produce a workable culture. These characteristics have limited the study of this commercially challenging bacterium. Consequently information on this bacterium is limited and no effective controls are currently available to confidently detect and manage this production risk...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27885500/a-review-of-anaesthetic-outcomes-in-patients-with-genetically-confirmed-mitochondrial-disorders
#7
A Smith, E Dunne, M Mannion, C O'Connor, I Knerr, A A Monavari, J Hughes, N Eustace, E Crushell
: Mitochondrial disorders are a clinically and biochemically diverse group of disorders which may involve multiple organ systems. General anaesthesia (GA) poses a potential risk of decompensation in children with mitochondrial disorders, and there is little guidance for anaesthetists and other clinicians regarding the optimal anaesthetic agents and perioperative management to provide to patients with mitochondrial disease[15]. The aim of this review was to document adverse events and perioperative complications from GA in patients with genetically confirmed mitochondrial disorders...
November 24, 2016: European Journal of Pediatrics
https://www.readbyqxmd.com/read/27882023/effects-of-bisoprolol-in-combination-with-trimetazidine-on-the-treatment-of-heart-failure-and-concomitant-chronic-obstructive-pulmonary-disease
#8
Yuanyuan Ke, Dingli Xu, Minxiong Li, Zenglong Wu, Yongpeng Huang
OBJECTIVE: To evaluate the effects of bisoprolol combined with trimetazidine on the treatment of heart failure patients having concomitant chronic obstructive pulmonary disease (COPD); in comparison with control group treated with standard therapy only. METHODS: A total of 120 heart failure patients having concomitant COPD were selected and randomly divided into a control group and a treatment group according to different treatment methods (n=60). The control group was given continuous low flow oxygen inhalation and inotropic agents, and their cardiac stress was also reduced...
September 2016: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/27876218/antifungal-activities-of-selected-essential-oils-against-fusarium-oxysporum-f-sp-lycopersici-1322-with-emphasis-on-syzygium-aromaticum-essential-oil
#9
Abhishek Sharma, Sasireka Rajendran, Ankit Srivastava, Satyawati Sharma, Bishwajit Kundu
The antifungal effects of four essential oils viz., clove (Syzygium aromaticum), lemongrass (Cymbopogon citratus), mint (Mentha × piperita) and eucalyptus (Eucalyptus globulus) were evaluated against wilt causing fungus, Fusarium oxysporum f. sp. lycopersici 1322. The inhibitory effect of oils showed dose-dependent activity on the tested fungus. Most active being the clove oil, exhibiting complete inhibition of mycelial growth and spore germination at 125 ppm with IC50 value of 18.2 and 0.3 ppm, respectively...
November 18, 2016: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/27872717/the-antibacterial-effect-of-ziziphora-clinopodioides-essential-oil-and-nisinagainst-salmonella-typhimurium-and-staphylococcus-aureus-in-doogh-a-yoghurt-based-iranian-drink
#10
Yasser Shahbazi
Doogh is the most popular and commonly consumed yoghurt-based Iranian drink. The aim of this study was to investigate the antibacterial effects of Ziziphora clinopodioides essential oil (ZEO) at 0.10 and 0.20% concentrations, nisin at 250 and 500 IU mL(-1), and their combination against Salmonella typhimurium and Staphylococcusaureus in doogh during storage at 4 ˚C for  9 days. Nine batches were studied as follows: control: no ZEO or nisin added, A: 0.10% ZEO, B: 0.20% ZEO, C: 250 IU mL(-1) nisin, D: 500 IU mL(-1) nisin, E: 0...
2016: Veterinary Research Forum
https://www.readbyqxmd.com/read/27868274/apci-as-an-innovative-ionization-mode-compared-to-ei-and-ci-for-the-analysis-of-a-large-range-of-organophosphate-esters-using-gc-ms-ms
#11
Wafaa Halloum, Ronan Cariou, Gaud Dervilly-Pinel, Farouk Jaber, Bruno Le Bizec
Organophosphate esters (OPEs) are chemical compounds incorporated into materials as flame-proof and/or plasticizing agents. In this work, 13 non-halogenated and 5 halogenated OPEs were studied. Their mass spectra were interpreted and compared in terms of fragmentation patterns and dominant ions via various ionization techniques (electron ionization (EI) and chemical ionization (CI) under vacuum and corona discharge atmospheric pressure chemical ionization (APCI)) on gas chromatography coupled to mass spectrometry (GC-MS)...
November 21, 2016: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/27866608/noble-metal-oxide-and-chalcogenide-based-nanomaterials-from-scalable-phototrophic-culture-systems
#12
Si Amar Dahoumane, Evan K Wujcik, Clayton Jeffryes
Phototrophic cell or tissue cultures can produce nanostructured noble metals, oxides and chalcogenides at ambient temperatures and pressures in an aqueous environment and without the need for potentially toxic solvents or the generation of dangerous waste products. These "green" synthesized nanobiomaterials can be used to fabricate biosensors and bio-reporting tools, theranostic vehicles, medical imaging agents, as well as tissue engineering scaffolds and biomaterials. While successful at the lab and experimental scales, significant barriers still inhibit the development of higher capacity processes...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27855875/mechanisms-of-antifungal-and-anti-aflatoxigenic-properties-of-essential-oil-derived-from-turmeric-curcuma-longa-l-on-aspergillus-flavus
#13
Yichen Hu, Jinming Zhang, Weijun Kong, Gang Zhao, Meihua Yang
The antifungal activity and potential mechanisms in vitro as well as anti-aflatoxigenic efficiency in vivo of natural essential oil (EO) derived from turmeric (Curcuma longa L.) against Aspergillus flavus was intensively investigated. Based on the previous chemical characterization of turmeric EO by gas chromatography-mass spectrometry, the substantially antifungal activities of turmeric EO on the mycelial growth, spore germination and aflatoxin production were observed in a dose-dependent manner. Furthermore, these antifungal effects were related to the disruption of fungal cell endomembrane system including the plasma membrane and mitochondria, specifically i...
April 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27855329/an-inter-laboratory-comparison-of-different-analytical-methods-for-the-determination-of-monomethylmercury-in-various-soil-and-sediment-samples-a-platform-for-method-improvement
#14
Hitoshi Kodamatani, Steven J Balogh, Yabing H Nollet, Akito Matsuyama, Vesna Fajon, Milena Horvat, Takashi Tomiyasu
An inter-laboratory study was conducted to compare results from different analytical methods for monomethylmercury (MeHg) concentrations in 17 soil and sediment samples. The samples were collected from mercury-contaminated areas, including Minamata Bay and Kagoshima Bay in Japan, the Idrija mercury mine in Slovenia, and an artisanal small-scale gold mining area in Indonesia. The Hg in these samples comes from several different sources: industrial waste from an acetaldehyde production facility, volcanic activity, Hg mining activity, and artisanal and small-scale gold mining activity (ASGM)...
November 14, 2016: Chemosphere
https://www.readbyqxmd.com/read/27844299/comparison-of-pneumotachography-and-anemometery-for-flow-measurement-during-mechanical-ventilation-with-volatile-anesthetics
#15
Jarred R Mondoñedo, Jacob Herrmann, John S McNeil, David W Kaczka
Volatile anesthetics alter the physical properties of inhaled gases, such as density and viscosity. We hypothesized that the use of these agents during mechanical ventilation would yield systematic biases in estimates of flow ([Formula: see text]) and tidal volume (V T) for two commonly used flowmeters: the pneumotachograph (PNT), which measures a differential pressure across a calibrated resistive element, and the hot-wire anemometer (HWA), which operates based on convective heat transfer from a current-carrying wire to a flowing gas...
November 14, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27843060/biological-effects-of-bacterial-pigment-undecylprodigiosin-on-human-blood-cells-treated-with-atmospheric-gas-plasma-in-vitro
#16
Saša Lazović, Andreja Leskovac, Sandra Petrović, Lidija Senerovic, Nevena Krivokapić, Tatjana Mitrović, Nikola Božović, Vesna Vasić, Jasmina Nikodinovic-Runic
It is known that some bacterial species are more resilient to different kinds of irradiation due to the naturally developed protective mechanisms and compounds such as pigments. On the other hand, reasoned tissue engineering using plasma remains a critical task and requires very precise control of plasma parameters in order to mitigate its potential detrimental effects. Here we isolated a natural protective agent, microbially produced undecylprodigiosin ((5'Z)-4'-methoxy-5'-[(5-undecyl-1H-pyrrol-2-yl)methylene]-1H,5'H-2,2'-bipyrrole), and investigated its effects on human blood cells independently and in combination with plasma...
November 11, 2016: Experimental and Toxicologic Pathology: Official Journal of the Gesellschaft Für Toxikologische Pathologie
https://www.readbyqxmd.com/read/27842857/isolation-purification-characterization-and-immunostimulatory-activity-of-polysaccharides-derived-from-american-ginseng
#17
Xiao-Hong Yu, Ying Liu, Xian-Ling Wu, Li-Zhai Liu, Wei Fu, Dan-Dan Song
In this study, crude American ginseng polysaccharide (AGPS) was extracted with hot water and preliminarily purified by using resin S-8 and Polyamide columns. Then, it was further purified and separated by DEAE-Sepharose CL-6B and Sepharose CL-6B chromatography, respectively. Five main fractions were obtained, named WPS-1, WPS-2, SPS-1, SPS-2 and SPS-3. Their homogeneities and structural characteristics were elucidated based on UV-vis spectroscopy, High Performance Gel Filtration Chromatography (HPGFC), Gas Chromatography (GC), Scanning Electron Microscopy (SEM), Infrared Spectrum (IR), and NMR Spectroscopy methods...
January 20, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27842581/impact-of-occupational-exposures-on-exacerbation-of-asthma-a-population-based-asthma-cohort-study
#18
Jeong-Lim Kim, Paul K Henneberger, Susanna Lohman, Anna-Carin Olin, Anna Dahlman-Höglund, Eva Andersson, Kjell Torén, Mathias Holm
BACKGROUND: Asthma is a prevalent chronic disease and occupation contributes to approximately 15 % of cases among adults. However, there are still few studies on risk factors for work-exacerbated asthma. The current study investigated the association between asthma exacerbations and occupational exposures. METHODS: The study comprised all currently working adults (n = 1356) who reported ever asthma in prior population-based cohorts. All subjects completed a questionnaire about exposures, occupations and exacerbations of asthma...
November 15, 2016: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/27827459/self-supported-crack-free-conducting-polymer-films-with-stabilized-wrinkling-patterns-and-their-applications
#19
Jixun Xie, Xue Han, Haipeng Ji, Juanjuan Wang, Jingxin Zhao, Conghua Lu
Self-supported conducting polymer films with controlled microarchitectures are highly attractive from fundamental and applied points of view. Here a versatile strategy is demonstrated to fabricate thin free-standing crack-free polyaniline (PANI)-based films with stable wrinkling patterns. It is based on oxidization polymerization of pyrrole inside a pre-wrinkled PANI film, in which the wrinkled PANI film is used both as a template and oxidizing agent for the first time. The subsequently grown polypyrrole (PPy) and the formation of interpenetrated PANI/PPy networks play a decisive role in enhancing the film integrity and the stability of wrinkles...
November 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27827378/development-of-a-source-exposure-matrix-for-occupational-exposure-assessment-of-electromagnetic-fields-in-the-interocc-study
#20
Javier Vila, Joseph D Bowman, Jordi Figuerola, David Moriña, Laurel Kincl, Lesley Richardson, Elisabeth Cardis
To estimate occupational exposures to electromagnetic fields (EMF) for the INTEROCC study, a database of source-based measurements extracted from published and unpublished literature resources had been previously constructed. The aim of the current work was to summarize these measurements into a source-exposure matrix (SEM), accounting for their quality and relevance. A novel methodology for combining available measurements was developed, based on order statistics and log-normal distribution characteristics...
November 9, 2016: Journal of Exposure Science & Environmental Epidemiology
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