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https://www.readbyqxmd.com/read/29353425/natural-attenuation-of-petroleum-hydrocarbons-a-study-of-biodegradation-effects-in-groundwater-vitanovac-serbia
#1
Nenad Marić, Ivan Matić, Petar Papić, Vladimir P Beškoski, Mila Ilić, Gordana Gojgić-Cvijović, Srđan Miletić, Zoran Nikić, Miroslav M Vrvić
The role of natural attenuation processes in groundwater contamination by petroleum hydrocarbons is of intense scientific and practical interest. This study provides insight into the biodegradation effects in groundwater at a site contaminated by kerosene (jet fuel) in 1993 (Vitanovac, Serbia). Total petroleum hydrocarbons (TPH), hydrochemical indicators (O2, NO3-, Mn, Fe, SO42-, HCO3-), δ13C of dissolved inorganic carbon (DIC), and other parameters were measured to demonstrate biodegradation effects in groundwater at the contaminated site...
January 20, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29353188/mechanism-of-anaerobic-bio-reduction-of-azo-dye-assisted-with-lawsone-immobilized-activated-carbon
#2
Daniel Olivo-Alanis, Refugio Bernardo Garcia-Reyes, Luis H Alvarez, Alcione Garcia-Gonzalez
Lawsone redox (LQ) mediator was covalently bound to granular activated carbon (GAC) by Fischer esterification. A high LQ adsorption capacity on GAC was achieved (∼230 mg/g), and desorption studies showed strong chemical stability. Furthermore, kinetic experiments with solid-phase redox mediator (RM) and their controls (soluble RM, GAC and anaerobic sludge) were tested for decolorization of congo red dye at initial concentration of 175 mg/L. Benzidine, a by-product of complete congo red reduction, was also measured by HPLC analysis along the kinetic experiments...
January 9, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29353021/phosphoproteomics-unveils-stable-energy-supply-as-key-to-flooding-tolerance-in-kandelia-candel
#3
Dezhuo Pan, Lingxia Wang, Fanglin Tan, Si Lu, Xiaojie Lv, Madiha Zaynab, Chi-Lien Cheng, Yakubu Saddeeq Abubakar, Shipin Chen, Wei Chen
The mangrove Kandelia candel (L.) Druce experiences daily flooding cycles. To explore the molecular mechanism underlying the physiological adaptation of K. candel to flooding, the potential role of protein phosphorylation in flooding responses was investigated by a large-scale quantitative phosphoproteomic analysis using isobaric tag for relative and absolute quantitation. Total 2141 unique phosphopeptides and 2603 non-redundant phosphorylation sites were identified from 1516 phosphoproteins in K. candel leaves...
January 15, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29352710/changes-in-hepg2-spheroid-behavior-induced-by-differences-in-the-gap-distance-between-spheroids-in-a-micropatterned-culture-system
#4
Daisuke Miyamoto, Takuya Hara, Ai Hyakutake, Kohji Nakazawa
Micropatterning is a promising technique for modulating culture environments. In this study, we investigated the effect of spheroid separation distance on their properties in a micropatterned chip of HepG2 spheroids. The basic chip design consisted of 37 collagen spots (300 μm in diameter) in a hexagonal arrangement on a glass substrate; the region without collagen-spots was modified by polyethylene glycol to create the non-adhesive surface. Three similar chips were fabricated with gap distances between collagen-spots of 500, 1000, and 1500 μm...
January 15, 2018: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/29352612/biogeographical-patterns-of-bacterial-and-archaeal-communities-from-distant-hypersaline-environments
#5
M Del R Mora-Ruiz, A Cifuentes, F Font-Verdera, C Pérez-Fernández, M E Farias, B González, A Orfila, R Rosselló-Móra
Microorganisms are globally distributed but new evidence shows that the microbial structure of their communities can vary due to geographical location and environmental parameters. In this study, 50 samples including brines and sediments from Europe, Spanish-Atlantic and South America were analysed by applying the operational phylogenetic unit (OPU) approach in order to understand whether microbial community structures in hypersaline environments exhibited biogeographical patterns. The fine-tuned identification of approximately 1000 OPUs (almost equivalent to "species") using multivariate analysis revealed regionally distinct taxa compositions...
December 21, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/29351278/analysis-of-the-tonsillar-microbiome-in-young-adults-with-sore-throat-reveals-a-high-relative-abundance-of-fusobacterium-necrophorum-with-low-diversity
#6
T Prescott Atkinson, Robert M Centor, Li Xiao, Fuchenchu Wang, Xiangqin Cui, William Van Der Pol, Casey D Morrow, Amy E Ratliff, Donna M Crabb, Arthur H Totten, Carlos A Estrada, Michael B Faircloth, Ken B Waites
Fusobacterium necrophorum (Fn), a gram-negative anaerobe, is increasingly implicated as an etiologic agent in older adolescents and young adults with sore throat. Inadequately treated Fn pharyngitis may result in suppurative complications such as peritonsillar abscess and Lemierre's syndrome. Data from the literature suggest that the incidence of life-threating complications in these age groups from Fn pharyngitis (Lemierre's syndrome) in the United States exceeds those associated with group A beta-hemolytic streptococcal (GAS) pharyngitis (acute rheumatic fever)...
2018: PloS One
https://www.readbyqxmd.com/read/29349739/enhanced-reductive-dechlorination-of-1-1-1-trichloroethane-using-zero-valent-iron-biochar-carrageenan-microspheres-preparation-and-microcosm-study
#7
Changling Ji, Liang Meng, Hualin Wang
In this study, a composite remediation material for the enhanced reductive dechlorination (ERD) of 1,1,1-trichloroethane (1,1,1-TCA) in aqueous solution was prepared. This material was comprised of biochar as the carrier and adsorbent, and carrageenan (CG) as the embedding medium to entrap the organic carbon sources and zero-valent iron (ZVI). We determined the suitable biochar dosage and organic carbon source in the composite alongside the optimal preparation conditions. Furthermore, using an anaerobic microcosm study, we discussed the performance and possible mechanisms of the composite on 1,1,1-TCA removal in aqueous solution...
January 18, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29349635/the-diving-reflex-and-asphyxia-working-across-species-in-physiological-ecology
#8
Joel B Hagen
Beginning in the mid-1930s the comparative physiologists Laurence Irving and Per Fredrik (Pete) Scholander pioneered the study of diving mammals, particularly harbor seals. Although resting on earlier work dating back to the late nineteenth century, their research was distinctive in several ways. In contrast to medically oriented physiology, the approaches of Irving and Scholander were strongly influenced by natural history, zoology, ecology, and evolutionary biology. Diving mammals, they argued, shared the cardiopulmonary physiology of terrestrial mammals, but evolution had modified these basic adaptive processes in extreme ways...
January 18, 2018: History and Philosophy of the Life Sciences
https://www.readbyqxmd.com/read/29349536/oxygen-uptake-efficiency-slope-and-prediction-of-post-operative-morbidity-and-mortality-in-patients-with-lung-cancer
#9
Sertaç Yakal, Sevtün Sofyalı, Berker Özkan, Safinaz Yıldız, Alper Toker, Erdem Kasikcioglu
OBJECTIVE: Peak oxygen consumption is a very valuable cardiopulmonary functional parameter in pre-operative evaluation of patients with lung cancer. However, it has several critical limitations for operability decision due to failure in achieving maximal level of exercise test for cases. The aim of this study was to reveal the importance of more accurate cardiopulmonary parameters that can be calculated from data of submaximal level test, such as oxygen uptake efficiency slope (OUES) and to determine whether it could be used in the operability decision phase for borderline cases by means of morbidity and mortality...
January 18, 2018: Lung
https://www.readbyqxmd.com/read/29349044/evaluating-the-effect-of-enzymatic-pretreatment-on-the-anaerobic-digestibility-of-pulp-and-paper-biosludge
#10
Sofia Bonilla, Zahra Choolaei, Torsten Meyer, Elizabeth A Edwards, Alexander F Yakunin, D Grant Allen
Anaerobic digestion of biosludge has not yet been implemented in pulp mills due to low biogas yields. Enzymatic pretreatment of biosludge has shown improvements in biogas yields but results are varied. A key limitation of previous studies is that they fail to consider the COD contribution from the enzyme solutions. The aim of this study was to systematically investigate the potential for enzymatic pretreatment on the anaerobic digestibility of pulp mill biosludge. Out of the six enzymes tested, four enhanced the anaerobic digestibility of biosludge...
March 2018: Biotechnology Reports
https://www.readbyqxmd.com/read/29349043/vermicomposting-and-anaerobic-digestion-viable-alternative-options-for-terrestrial-weed-management-a-review
#11
REVIEW
Biswanath Saha, Chaichi Devi, Meena Khwairakpam, Ajay S Kalamdhad
The management of terrestrial weed is of great concern for the scientific community as these weeds cause adverse effect in different ecosystems like forest, agriculture and urban. The widespread of these weeds by their adaptive capability and morphological advancement is difficult to control. Parthenium hysterophorous, Lantana camara, Saccharum spontaneum, Ageratum conyzoides are the weeds that spread all over the world. There are various management practices employed for the control of this weeds. But all of these practices have some drawbacks those are neither environment friendly nor economical...
March 2018: Biotechnology Reports
https://www.readbyqxmd.com/read/29348917/refractory-actinomycosis-of-the-humerus
#12
Mariano O Abrego, Franco L De Cicco, Noelia B Montenegro, Jorge G Boretto, Pablo De Carli, Gerardo L Gallucci
Actinomycosis is a chronic, opportunistic infection caused by Actinomyces species, such as Actinomyces bacillus. Actinomycosis in long bones is very rare. To the best of our knowledge, isolated primary actinomycosis of the humerus is rarely reported in literature. We present a rare case of a refractory primary actinomycosis of the humerus. A 66-year-old man with no history of concomitant conditions was admitted to our hospital with a history of a tumour on the distal third of the left arm as a result of a closed trauma without fracture 20 years before...
2018: SAGE Open Medical Case Reports
https://www.readbyqxmd.com/read/29346677/anatomical-explanations-for-acute-depressions-in-radial-pattern-of-axial-sap-flow-in-two-diffuse-porous-mangrove-species-implications-for-water-use
#13
Hewei Zhao, Shengchang Yang, Xudong Guo, Congjiao Peng, Xiaoxuan Gu, Chuanyuan Deng, Luzhen Chen
Mangrove species have developed uniquely efficient water-use strategies in order to survive in highly saline and anaerobic environments. Herein, we estimated the stand water use of two diffuse-porous mangrove species of the same age, Sonneratia apetala Buch. Ham and Sonneratia caseolaris (L.) Engl., growing in a similar intertidal environment. Specifically, to investigate the radial patterns of axial sap flow density (Js) and understand the anatomical traits associated with them, we measured axial sap flow density in situ together with micromorphological observations...
January 16, 2018: Tree Physiology
https://www.readbyqxmd.com/read/29345315/chlorophyll-fluorescence-induction-and-relaxation-system-for-the-continuous-monitoring-of-photosynthetic-capacity-in-photobioreactors
#14
Taras Antal, Ivan Konyukhov, Alena Volgusheva, Tatyana Plyusnina, Sergei Khruschev, Galina Kukarskikh, Sergey Goryachev, Andrey Rubin
The development of high performance photobioreactors equipped with automatic systems for non-invasive real-time monitoring of cultivation conditions and photosynthetic parameters is a challenge in algae biotechnology. Therefore, we developed a chlorophyll fluorescence measuring system for the online recording of the light-induced fluorescence rise (OJIP transients) and the dark relaxation of the flash-induced fluorescence yield (Qa- - re-oxidation kinetics) in photobioreactors. This system provides automatic measurements in a broad range of chlorophyll concentrations at high frequency of gastight sampling, and advanced data analysis...
January 18, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29345191/enhanced-sulfide-removal-and-bioelectricity-generation-in-microbial-fuel-cells-with-anodes-modified-by-vertically-oriented-nanosheets
#15
Meng Yang, Yuezhi Zhong, Baogang Zhang, Jiaxin Shi, Xueyang Huang, Yi Xing, Lin Su, Huipeng Liu, Alistair G L Borthwick
Anode materials and structures are of critical importance for microbial fuel cells (MFCs) recovering energy from toxic substrates. Carbon-fiber-felt anodes modified by layers of vertically oriented TiO2 and Fe2O3 nanosheets respectively were applied in present study. Enhanced sulfide removal efficiencies (both over 90%) were obtained after 48 h operation, with maximum power densities improved by 1.53 and 1.36 folds compared with MFCs with raw carbon-fiber-felt anode, respectively. The modified anodes provided more active sites for microbial adhesion with increasing biomass densities...
January 18, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29344709/microbial-characterization-of-methanogenic-and-iron-reducing-consortium-in-reactors-with-polychlorinated-biphenyls
#16
Mara R de Lima E Silva, Regiane C Correa, Isabel K Sakamoto, Maria B A Varesche
Recent papers have confirmed current environmental pollution and the continuous release of polychlorinated biphenyls (PCBs) despite the prohibition of its manufacture worldwide. As the dehalogenating microorganisms are able to remove halogens from various analogous compounds, the characterization of PCB metabolisms can improve the degradation of similar compounds. Thus, this study extensively evaluated the microbial community developed in methanogenic and iron-reducing reactors. The horizontal-flow anaerobic reactor (HAIB) with real waste of Aroclor (1 mL L-1) was fed with mineral medium, ethanol, and sodium formate...
January 17, 2018: Current Microbiology
https://www.readbyqxmd.com/read/29341844/empiric-antibiotics-for-sepsis
#17
Sara A Buckman, Isaiah R Turnbull, John E Mazuski
BACKGROUND: Sepsis is life-threatening organ dysfunction caused by a dysregulated host response to infection. Early recognition and treatment are the cornerstones of management. METHODS: Review of the English-language literature. RESULTS: For both sepsis and septic shock "antimicrobials [should be] be initiated as soon as possible and within one hour" (Surviving Sepsis Campaign). The risk of progression from severe sepsis to septic shock increases 8% for each hour before antibiotics are started...
January 17, 2018: Surgical Infections
https://www.readbyqxmd.com/read/29340005/comparison-of-aerobic-performance-testing-protocols-in-elite-male-wheelchair-basketball-players
#18
Bartosz Molik, Andrzej Kosmol, Natalia Morgulec-Adamowicz, Judit Lencse-Mucha, Anna Mróz, Karol Gryko, Jolanta Marszałek
In wheelchair sports, aerobic performance is commonly assessed with the use of an arm crank ergometer (ACE), a wheelchair ergometer (WCE) or a wheelchair treadmill (WCT). There are different protocols to identify peak oxygen uptake in wheelchair sports; however, only a few protocols have been applied to evaluate these conditions in wheelchair basketball players. The purpose of this study was to compare physiological responses during maximal exercise testing with the use of ACE and WCT in wheelchair basketball players...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339985/butterfly-sprint-swimming-technique-analysis-of-somatic-and-spatial-temporal-coordination-variables
#19
Marek Strzała, Arkadiusz Stanula, Piotr Krężałek, Andrzej Ostrowski, Marcin Kaca, Grzegorz Głąb
The aim of this study was to investigate somatic properties and force production of leg extensor muscles measured in the countermovement jump test (CMJ), as well as to analyse kinematic variables of sprint surface butterfly swimming. Thirty-four male competitive swimmers were recruited with an average age of 19.3 ± 1.83 years. Their average body height (BH) was 183.7 ± 5.93 cm, body fat content 10.8 ± 2.64% and body mass (BM) 78.3 ± 5.0 kg. Length measurements of particular body segments were taken and a counter movement jump (CMJ) as well as an all-out 50 m butterfly speed test were completed...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339722/the-deep-subsurface-sulfate-reducer-desulfotomaculum-kuznetsovii-employs-two-methanol-degrading-pathways
#20
Diana Z Sousa, Michael Visser, Antonie H van Gelder, Sjef Boeren, Mervin M Pieterse, Martijn W H Pinkse, Peter D E M Verhaert, Carsten Vogt, Steffi Franke, Steffen Kümmel, Alfons J M Stams
Methanol is generally metabolized through a pathway initiated by a cobalamine-containing methanol methyltransferase by anaerobic methylotrophs (such as methanogens and acetogens), or through oxidation to formaldehyde using a methanol dehydrogenase by aerobes. Methanol is an important substrate in deep-subsurface environments, where thermophilic sulfate-reducing bacteria of the genus Desulfotomaculum have key roles. Here, we study the methanol metabolism of Desulfotomaculum kuznetsovii strain 17T, isolated from a 3000-m deep geothermal water reservoir...
January 16, 2018: Nature Communications
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