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https://www.readbyqxmd.com/read/28328192/molecular-insights-on-dissolved-organic-matter-transformation-by-supraglacial-microbial-communities
#1
Runa Antony, Amanda S Willoughby, Amanda M Grannas, Victoria Catanzano, Rachel L Sleighter, Meloth Thamban, Patrick G Hatcher, Shanta Nair
Snow overlays the majority of Antarctica and is an important repository of dissolved organic matter (DOM). DOM transformations by supraglacial microbes are not well understood. We use ultrahigh resolution mass spectrometry to elucidate molecular changes in snowpack DOM by in situ microbial processes (up to 55 days) in a coastal Antarctic site. Both autochthonous and allochthonous DOM is highly bio-available and is transformed by resident microbial communities through parallel processes of degradation and synthesis...
March 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28327661/near-surface-heating-of-young-rift-sediment-causes-mass-production-and-discharge-of-reactive-dissolved-organic-matter
#2
Yu-Shih Lin, Boris P Koch, Tomas Feseker, Kai Ziervogel, Tobias Goldhammer, Frauke Schmidt, Matthias Witt, Matthias Y Kellermann, Matthias Zabel, Andreas Teske, Kai-Uwe Hinrichs
Ocean margin sediments have been considered as important sources of dissolved organic carbon (DOC) to the deep ocean, yet the contribution from advective settings has just started to be acknowledged. Here we present evidence showing that near-surface heating of sediment in the Guaymas Basin, a young extensional depression, causes mass production and discharge of reactive dissolved organic matter (DOM). In the sediment heated up to ~100 °C, we found unexpectedly low DOC concentrations in the pore waters, reflecting the combined effect of thermal desorption and advective fluid flow...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28319422/phototherapy-for-improvement-of-performance-and-exercise-recovery-comparison-of-3-commercially-available-devices
#3
Thiago De Marchi, Vinicius Mazzochi Schmitt, Carla Danúbia da Silva Fabro, Larissa Lopes da Silva, Juliane Sene, Olga Tairova, Mirian Salvador
CONTEXT:   Recent studies suggest the prophylactic use of low-powered laser/light has ergogenic effects on athletic performance and postactivity recovery. Manufacturers of high-powered lasers/light devices claim that these can produce the same clinical benefits with increased power and decreased irradiation time; however, research with high-powered lasers is lacking. OBJECTIVE:   To evaluate the magnitude of observed phototherapeutic effects with 3 commercially available devices...
March 20, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28296738/clinical-efficacy-of-a-centric-relation-occlusal-splint-and-intra-articular-liquid-phase-concentrated-growth-factor-injection-for-the-treatment-of-temporomandibular-disorders
#4
Jung-Wu Yang, Yi-Chia Huang, Shang-Liang Wu, Shun-Yao Ko, Chiang-Chin Tsai
The agony that accompanies the incidence and symptoms of temporomandibular disorders (TMDs) is an important concern in the oral and maxillofacial region. The objective of this study was to explore the clinical findings after centric relation occlusal splint (CROS) treatment and intra-articular injection treatment with liquid phase concentrated growth factors (LPCGFs) in patients with disc displacement without reduction (DDWOR).The group under investigation of this retrospective cohort study included patients with DDWOR who received treatment from April 2014 until March 2016...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28293298/rapid-development-of-entity-based-data-models-for-bioinformatics-with-persistence-object-oriented-design-and-structured-interfaces
#5
Elishai Ezra Tsur
Databases are imperative for research in bioinformatics and computational biology. Current challenges in database design include data heterogeneity and context-dependent interconnections between data entities. These challenges drove the development of unified data interfaces and specialized databases. The curation of specialized databases is an ever-growing challenge due to the introduction of new data sources and the emergence of new relational connections between established datasets. Here, an open-source framework for the curation of specialized databases is proposed...
2017: BioData Mining
https://www.readbyqxmd.com/read/28281064/unique-characteristics-of-algal-dissolved-organic-matter-and-their-association-with-membrane-fouling-behavior-a-review
#6
Quang Viet Ly, Tahir Maqbool, Jin Hur
Over the last several decades, the frequent occurrence of algal bloom in drinking water supplies, driven by increasing anthropogenic input and climate change, has posed serious problems for membrane filtration processes, resulting in reduced membrane permeability and increased energy consumption. It is essential to comprehensively understand the characteristics of algal dissolved organic matter (DOM) and the subsequent effects on the filtration processes for better insight into membrane fouling mitigation. Many studies have revealed that algal DOM has displayed unique characteristics distinguished from other sources of DOM with respect to the chemical composition, the structures, and the molecular weight distributions...
March 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28281058/precipitation-and-air-temperature-control-the-variations-of-dissolved-organic-matter-along-an-altitudinal-forest-gradient-gongga-mountains-china
#7
Zhaoyong Hu, Genxu Wang, Xiangyang Sun
Dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) contribute significantly to C and N cycling in forest ecosystems. Little information is available on the variations in the DOC and DON concentrations and depositions in bulk and stand precipitation within forests along an altitudinal gradient. To determine the temporal variations in the DOC and DON concentrations and depositions in different forests and the spatial variations along the elevation gradient, the DOC and DON concentrations and depositions were measured in bulk precipitation, throughfall, and stemflow within three forest types, i...
March 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28277623/near-visual-impairment-and-spectacle-coverage-in-telangana-india
#8
Srinivas Marmamula, Rohit C Khanna Doms, Eswararao Kunuku, Gullapalli N Rao
IMPORTANCE: The study highlights the burden of Near Visual Impairment (NVI) in India BACKGROUND: NVI is a common condition that can be addressed through provision of spectacles. The study aims to assess the prevalence of NVI and spectacle coverage among those aged ≥40 years south Indian state of Telangana. DESIGN: Population based cross sectional study using a rapid assessment methodology. PARTICIPANTS: 5140 participants enumerated from 123 clusters in two districts and have presenting distance visual acuity of ≥ 6/18 in the better eye...
March 9, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28277426/effect-of-cold-water-immersion-performed-on-successive-days-on-physical-performance-muscle-damage-and-inflammatory-hormonal-and-oxidative-stress-markers-in-volleyball-players
#9
Victor H de Freitas, Solange P Ramos, Maurício G Bara-Filho, Daniel G S Freitas, Danilo R Coimbra, Rubens Cecchini, Flávia A Guarnier, Fábio Y Nakamura
The aim of this study was to investigate the effects of daily cold water immersion (CWI) on physical performance, muscle damage, and inflammatory, hormonal, and oxidative stress markers in volleyball. Six players were submitted to CWI and six players to a placebo, during 5 training days. Thigh circumference, squat jump, and agility were measured on the 1, 3 and 6 days. On the 1 and 6 days, blood and saliva were collected for analysis of oxidative stress, muscle damage, and inflammatory and hormonal levels. Muscle soreness and countermovement jump were quantified daily...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28276912/soreness-related-changes-in-three-dimensional-running-biomechanics-following-eccentric-knee-extensor-exercise
#10
Max R Paquette, Shelby A Peel, Brian K Schilling, Dan A Melcher, Richard J Bloomer
Runners often experience delayed onset muscle soreness (DOMS), especially of the knee extensors, following prolonged running. Sagittal knee joint biomechanics are altered in the presence of knee extensor DOMS but it is unclear how muscle soreness affects lower limb biomechanics in other planes of motion. The purpose of this study was to assess the effects of knee extensor DOMS on three-dimensional (3D) lower limb biomechanics during running. Thirty-three healthy men (25.8 ± 6.8 years; 84.1 ± 9.2 kg; 1...
February 22, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28273582/a-diffusive-gradients-in-thin-films-technique-for-the-assessment-of-bisphenols-desorption-from-soils
#11
Dong-Xing Guan, Jian-Lun Zheng, Jun Luo, Hao Zhang, William Davison, Lena Q Ma
Desorption/adsorption of bisphenols (BPs) in soils affects their mobility and availability. However, the kinetics of these processes have not been well studied, due to the lack of appropriate means of measurement. Diffusive gradients in thin-films (DGT) technique can assess kinetic processes in soils and have recently been developed for measuring three BPs (BPA, BPB and BPF). DGT was deployed for 2.5h to 20 d in five soils with different soil properties. Non-linear increase in mass accumulation by DGT with time indicated poor resupply of BPs from soil solid to solution phase...
February 27, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28269087/analyzing-the-influence-of-curl-speed-in-fatiguing-biceps-brachii-muscles-using-semg-signals-and-multifractal-detrended-moving-average-algorithm
#12
Kiran Marri, Ramakrishnan Swaminathan
In this work, an attempt has been made to analyze surface electromyography (sEMG) signals of fatiguing biceps brachii muscles at different curl speeds using multifractal detrended moving average (MFDMA) algorithm. For this purpose, signals are recorded from fifty eight healthy subjects while performing curl exercise at their comfortable speed until fatigue. The signals of first and last curls are considered as nonfatigue and fatigue conditions, respectively. Further, the number of curls performed by each subject and the endurance time is used for computing the normalized curl speed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267919/the-role-of-free-radicals-reactive-oxygen-species-in-mehg-photodegradation-importance-of-utilizing-appropriate-scavengers
#13
Xiaoxiao Han, Yanbin Li, Dan Li, Chang Liu
A variety of free radicals (FR)/reactive oxygen species (ROS) have been proposed to dominate methylmercury (MeHg) photodegradation, primarily based on the results of FR/ROS scavenger addition experiments. However, in addition to eliminating FR/ROS, the added scavengers may also affect the experimental results by altering some water chemical properties, resulting in a misleading assessment of the importance of FR/ROS. In this study, 20 common FR/ROS scavengers were evaluated in terms of their influence on light absorbance, pH, MeHg analysis, MeHg-dissolved organic matter (DOM) complexation, and the scavenger-induced degradation of MeHg...
March 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28265543/herbs-and-natural-supplements-in-the-prevention-and-treatment-of-delayed-onset-muscle-soreness
#14
REVIEW
Abbas Meamarbashi
OBJECTIVE: Unaccustomed and intense eccentric exercise is a common cause of delayed-onset muscle soreness (DOMS). There are multiple remedies for the treatment of DOMS, but its clinical and laboratory pieces of evidence are scarce. Currently, the treatments proposed for DOMS are numerous and include pharmaceuticals, herbal remedies, stretching, massage, nutritional supplements, and other alternatives. To find a holistic treatment with effective pain relief and minimum side effects, complementary and alternative medicine, including herbal therapies, plays a main role...
January 2017: Avicenna Journal of Phytomedicine
https://www.readbyqxmd.com/read/28264625/interactions-between-copper-ii-and-dom-in-the-urban-stormwater-runoff-modeling-and-characterizations
#15
Chen Zhao, Chong-Chen Wang, Jun-Qi Li, Peng Wang, Jia-Qi Ou, Jing-Rui Cui
Dissolved organic matter (DOM) can strongly interact with both organic and inorganic contaminants to influence their transportation, transformation, bioavailability, toxicity and even their ultimate fate. Within this work, DOM was extracted from urban stormwater runoff samples collected from a regular sampling site of a typical residential area in Beijing, China. Copper(II) ions were selected as model to investigate the interactions between DOM and typical heavy metals. Both ultraviolet (UV) absorbance and fluorescence titration methods were introduced to determine the complex capacities (CL) and conditional stability constants (log KM) of bonding between DOM and copper (II) ions, which revealed that the values of CL were 85...
March 6, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28264486/do-plant-bound-masked-mycotoxins-contribute-to-toxicity
#16
REVIEW
Silvia W Gratz
Masked mycotoxins are plant metabolites of mycotoxins which co-contaminate common cereal crops. Since their discovery, the question has arisen if they contribute to toxicity either directly or indirectly through the release of the parent mycotoxins. Research in this field is rapidly emerging and the aim of this review is to summarize the latest knowledge on the fate of masked mycotoxins upon ingestion. Fusarium mycotoxins are the most prevalent masked mycotoxins and evidence is mounting that DON3Glc and possibly other masked trichothecenes are stable in conditions prevailing in the upper gut and are not absorbed intact...
February 28, 2017: Toxins
https://www.readbyqxmd.com/read/28259834/the-anaerobic-digestion-process-capability-to-produce-biostimulant-the-case-study-of-the-dissolved-organic-matter-dom-vs-auxin-like-property
#17
Barbara Scaglia, Michele Pognani, Fabrizio Adani
Biostimulants improve plant growth by stimulating nutrient uptake and efficiency, improving tolerance to abiotic stress and raising crop quality. Biostimulants are currently only recognised in five categories. However, the recent interest in this sector has led to the identification of some new ones. The aim of this work was to study the auxin-like activity of digestate dissolved organic matter (DOM) obtained from full scale anaerobic digester plants. All DOMs had biostimulant capacity comparable with humic acid and amino acids...
March 2, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28259078/spectral-characteristics-of-dissolved-organic-matter-in-various-agricultural-soils-throughout-china
#18
Jiakai Gao, Chenglong Liang, Guangzhu Shen, Jialong Lv, Haiming Wu
Dissolved organic matter (DOM) plays an essential role in many environmental processes, particularly in soil ecosystems. In the present study, ultraviolet-visible (UV-Vis) spectroscopy and parallel factor analysis (PARAFAC) of three-dimensional fluorescence excitation-emission matrices (3D-EEMs) were used to characterize DOM extracted from various agricultural soils across four climate regions of China. The maximum (86.01 mg L(-1)) and minimum (17.39 mg L(-1)) dissolved organic carbon (DOC) concentrations were found in soils from Jiangsu and Yunnan, respectively...
March 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28259076/investigating-the-effect-of-hardness-cations-on-coagulation-the-aspect-of-neutralisation-through-al-iii-dissolved-organic-matter-dom-binding
#19
Yuxuan Zhou, Mingquan Yan, Ruiping Liu, Dongsheng Wang, Jiuhui Qu
Hardness cations are ubiquitous and abundant in source water, while the effect of hardness on the performance of coagulation for dissolved organic matter (DOM) removal in water treatment remains unclear due to the limitation of methods that can characterise the subtle interactions between DOM, coagulant and hardness cations. This work quantified the competition between coagulant Al(3+) and hardness cations to bind onto DOM using absorbance spectroscopy acquired at different Al(3+) concentrations in the absence and presence of Ca(2+) or Mg(2+)...
February 20, 2017: Water Research
https://www.readbyqxmd.com/read/28258948/distal-oblique-metatarsal-osteotomy-for-hallux-valgus-deformity-a-clinical-analysis
#20
Olcay Guler, Barıs Yilmaz, Serhat Mutlu, Mehmet Halis Cerci, Nurettin Heybeli
We compared the outcomes of the distal oblique metatarsal (DOM) osteotomy, which is parallel to the articulation surface of the proximal phalanx, with those of the Chevron osteotomy and evaluated whether displacement and shortening of the first metatarsal have any effect on the incidence of metatarsalgia and patient satisfaction. Patients treated with the DOM osteotomy (n = 30) or distal Chevron osteotomy (n = 31) were evaluated retrospectively. The Chevron and DOM osteotomies both provided significant improvement in the first intermetatarsal angle (p < ...
February 28, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
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