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https://www.readbyqxmd.com/read/28646766/gaps-in-aquatic-toxicological-studies-of-microplastics
#1
REVIEW
Ali Karami
The contamination of aquatic environments with microplastics (MPs) has spurred an unprecedented interest among scientific communities to investigate their impacts on biota. Despite the rapid growth in the number of studies on the aquatic toxicology of MPs, controversy over the fate and biological impacts of MPs is increasingly growing mainly due to the absence of standardized laboratory bioassays. Given the complex features of MPs, such as the diversity of constituent polymers, additives, shapes and sizes, as well as continuous changes in the particle buoyancy as a result of fouling and defouling processes, it is necessary to modify conventional bioassay protocols before employing them for MP toxicity testings...
June 14, 2017: Chemosphere
https://www.readbyqxmd.com/read/28642676/international-society-of-sports-nutrition-position-stand-protein-and-exercise
#2
REVIEW
Ralf Jäger, Chad M Kerksick, Bill I Campbell, Paul J Cribb, Shawn D Wells, Tim M Skwiat, Martin Purpura, Tim N Ziegenfuss, Arny A Ferrando, Shawn M Arent, Abbie E Smith-Ryan, Jeffrey R Stout, Paul J Arciero, Michael J Ormsbee, Lem W Taylor, Colin D Wilborn, Doug S Kalman, Richard B Kreider, Darryn S Willoughby, Jay R Hoffman, Jamie L Krzykowski, Jose Antonio
The International Society of Sports Nutrition (ISSN) provides an objective and critical review related to the intake of protein for healthy, exercising individuals. Based on the current available literature, the position of the Society is as follows:An acute exercise stimulus, particularly resistance exercise, and protein ingestion both stimulate muscle protein synthesis (MPS) and are synergistic when protein consumption occurs before or after resistance exercise.For building muscle mass and for maintaining muscle mass through a positive muscle protein balance, an overall daily protein intake in the range of 1...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28640879/dual-targeting-of-a-virus-movement-protein-to-er-and-plasma-membrane-subdomains-is-essential-for-plasmodesmata-localization
#3
Kazuya Ishikawa, Masayoshi Hashimoto, Akira Yusa, Hiroaki Koinuma, Yugo Kitazawa, Osamu Netsu, Yasuyuki Yamaji, Shigetou Namba
Plant virus movement proteins (MPs) localize to plasmodesmata (PD) to facilitate virus cell-to-cell movement. Numerous studies have suggested that MPs use a pathway either through the ER or through the plasma membrane (PM). Furthermore, recent studies reported that ER-PM contact sites and PM microdomains, which are subdomains found in the ER and PM, are involved in virus cell-to-cell movement. However, functional relationship of these subdomains in MP traffic to PD has not been described previously. We demonstrate here the intracellular trafficking of fig mosaic virus MP (MPFMV) using live cell imaging, focusing on its ER-directing signal peptide (SPFMV)...
June 22, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28639443/relationship-between-the-handball-specific-complex-test-nonspecific-field-tests-and-the-match-performance-score-in-elite-professional-handball-players
#4
Souhail Hermassi, Mohamed S Chelly, Rainer Wollny, Birgit Hoffmeyer, Georg Fieseler, Stephan Schulze, Lars Irlenbusch, Karl-Stefan Delank, Roy J Shephard, Thomas Bartels, René Schwesig
BACKGROUND: This study assessed the validity of the handball-specific complex-test (HBCT) and two nonspecific field tests in professional elite handball athletes, using the match performance score (MPS) as the gold standard of performance. METHODS: Thirteen elite male handball players (age: 27.4 ± 4.8 years; premier German league) performed the HBCT, the Yo-Yo Intermittent Recovery Test (Yo-Yo-IR1-test) and a repeated shuttle sprint ability (RSA) test at the beginning of pre-season training...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28638350/branched-chain-amino-acid-ingestion-stimulates-muscle-myofibrillar-protein-synthesis-following-resistance-exercise-in-humans
#5
Sarah R Jackman, Oliver C Witard, Andrew Philp, Gareth A Wallis, Keith Baar, Kevin D Tipton
The ingestion of intact protein or essential amino acids (EAA) stimulates mechanistic target of rapamycin complex-1 (mTORC1) signaling and muscle protein synthesis (MPS) following resistance exercise. The purpose of this study was to investigate the response of myofibrillar-MPS to ingestion of branched-chain amino acids (BCAAs) only (i.e., without concurrent ingestion of other EAA, intact protein, or other macronutrients) following resistance exercise in humans. Ten young (20.1 ± 1.3 years), resistance-trained men completed two trials, ingesting either 5...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28635485/letter
#6
Suzy
Why is it 'interesting' that three of the nurse MPs are Conservative (Election wins boost nurse numbers in the Commons, news, 14 June)?
June 21, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28633946/microplastics-in-gut-contents-of-coastal-freshwater-fish-from-r%C3%A3-o-de-la-plata-estuary
#7
Rocío S Pazos, Tomás Maiztegui, Darío C Colautti, Ariel H Paracampo, Nora Gómez
The presence of microplastics (MPs) in gut contents of coastal freshwater fish of the Rio de la Plata estuary was studied. Samples were taken in six sites where 87 fish belonging to 11 species and four feeding habits were captured. Presence of MPs was verified in the 100% of fish. The fibres represented the 96% of MPs found. The number of MPs in gut contents was significantly higher close to sewage discharge. There was not found relationship between number of MPs and fish length, weight or feeding habit. The spatial differences in mean number of MPs in fish observed in this study, suggest that environmental availability of MPs could be of great importance to explain the differences found among sampling sites analysed...
June 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28633858/effects-of-processing-parameters-in-the-sonic-assisted-water-extraction-sawe-of-6-gingerol
#8
Syaripah Zaimah Syed Jaapar, Noor Azian Morad, Yoshio Iwai, Mariam Firdhaus Mad Nordin
The use of water in subcritical conditions for extraction has several drawbacks. These include the safety features, higher production costs and possible degradation of the bioactive compounds. To overcome these problems, sonic energy and an entrainer were used as external interventions to decrease the polarity of water at milder operating conditions. The effect of low (28kHz) and high (800kHz) frequencies of sonication in the extraction of the main ginger bioactive compound (6-gingerol) were compared. Six parameters were studied: mean particle size (MPS, mm), time of extraction, applied power, sample to solvent ratio (w/v), temperature of extraction, and the percentage of entrainer...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28629587/microparticles-in-chronic-heart-failure
#9
Alexander E Berezin
Heart failure (HF) continues to have a sufficient impact on morbidity, mortality, and disability in developed countries. Growing evidence supports the hypothesis that microparticles (MPs) might contribute to the pathogenesis of the HF development playing a pivotal role in the regulation of the endogenous repair system, thrombosis, coagulation, inflammation, immunity, and metabolic memory phenomenon. Therefore, there is a large body of data clarifying the predictive value of MP numerous in circulation among subjects with HF...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28629417/use-of-mobile-and-cordless-phones-and-change-in-cognitive-function-a-prospective-cohort-analysis-of-australian-primary-school-children
#10
Chhavi Raj Bhatt, Geza Benke, Catherine L Smith, Mary Redmayne, Christina Dimitriadis, Anna Dalecki, Skye Macleod, Malcolm R Sim, Rodney J Croft, Rory Wolfe, Jordy Kaufman, Michael J Abramson
BACKGROUND: Some previous studies have suggested an association between children's use of mobile phones (MPs)/cordless phones (CPs) and development of cognitive function. We evaluated possible longitudinal associations between the use of MPs and CPs in a cohort of primary school children and effects on their cognitive function. METHODS: Data on children's socio-demographics, use of MPs and CPs, and cognitive function were collected at baseline (2010-2012) and follow-up (2012-2013)...
June 19, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28628249/defining-a-temporal-order-of-genetic-requirements-for-development-of-mycobacterial-biofilms
#11
Yong Yang, Joseph Thomas, Yunlong Li, Catherine Vilchèze, Keith M Derbyshire, William R Jacobs, Anil K Ojha
Most mycobacterial species spontaneously form biofilms, inducing unique growth physiologies and reducing drug sensitivity. Biofilm growth progresses through three genetically programmed stages: substratum attachment, intercellular aggregation and architecture maturation. Growth of Mycobacterium smegmatis biofilms requires multiple factors including a chaperonin (GroEL1) and a nucleoid-associated protein (Lsr2), although how their activities are linked remains unclear. Here we show that Lsr2 participates in intercellular aggregation, but substratum attachment of Lsr2 mutants is unaffected, thereby genetically distinguishing these developmental stages...
June 19, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28627875/preparation-of-gemini-surfactant-conjugated-polymer-aggregates-for-enhanced-fluorescence-and-bioimaging-application
#12
Hua Wang, Lingyun Zhou, Chengcheng Zhou, Weiwei Zhao, Jianwu Wang, Libing Liu, Shu Wang, Yilin Wang
Conjugated polymers have great potential applications in bioimaging. However, the aggregation of conjugated polymers driven by electrostatic and hydrophobic interactions in aqueous media results in the reduction of photoluminescence quantum efficiency. In present work we synthesized a carboxylate gemini surfactant (SDHC) to adjust the aggregation behaviors and fluorescence properties of conjugated polymers (anionic MPS-PPV and cationic PMNT). This gemini surfactant shows very low critical micellar concentration (CMC) in aqueous solution and forms vesicles above CMC...
June 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28627567/dissecting-binding-of-a-%C3%AE-barrel-membrane-protein-by-phage-display
#13
Luz M Meneghini, Sarvind Tripathi, Marcus A Woodworth, Sudipta Majumdar, Thomas L Poulos, Gregory A Weiss
Membrane proteins (MPs) constitute a third of all proteomes, and contribute to a myriad of cellular functions including intercellular communication, nutrient transport and energy generation. For example, TonB-dependent transporters (TBDTs) in the outer membrane of Gram-negative bacteria play an essential role transporting iron and other nutrients into the bacterial cell. The inherently hydrophobic surfaces of MPs complicates protein expression, purification, and characterization. Thus, dissecting the functional contributions of individual amino acids or structural features through mutagenesis can be a challenging ordeal...
June 19, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28624718/microparticles-in-acute-coronary-syndrome
#14
Chrysostomos A Mavroudis, Despina Eleftheriou, Ying Hong, Bikash Majumder, Sudheer Koganti, Ray Sapsford, Janet North, Mark Lowdell, Nigel Klein, Paul Brogan, Roby D Rakhit
BACKGROUND: Emerging evidence supports the role of cell-derived microparticles (MPs) in the pathophysiology of acute coronary syndrome (ACS). OBJECTIVES: To explore the relationship between coronary and systemic MP levels, investigate the correlation between MPs, inflammatory markers and Troponin T in patients with ACS. METHODS: Thirty seven patients with ACS scheduled for percutaneous coronary interventions (PCI) were studied. Eleven patients with stable angina (SA) were included as a control group...
June 9, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28624423/2-methylpyridine-1-ium-1-sulfonate-from-allium-hirtifolium-an-anti-angiogenic-compound-which-inhibits-growth-of-mcf-7-and-mda-mb-231-cells-through-cell-cycle-arrest-and-apoptosis-induction
#15
Hamid-Reza Mohammadi-Motlagh, Yalda Shokohinia, Mahdi Mojarrab, Hassan Rasouli, Ali Mostafaie
Natural products have well been recognized as sources of drugs in cancer treatment. Some medicinal plants contain the constituents with potent anti-angiogenic and anti-cancer effects, which have offered great hopes of being used as drugs for treating various cancers. The present study aims at identifying the anti-angiogenic effects of 2-Methylpyridine-1-ium-1-sulfonate (MPS) isolated from the ethyl acetate extract (EA) of Persian shallot (Allium hirtifolium). In a concentration-dependent manner, the MPS was able to inhibit endothelial cell migration and angiogenesis in both in vivo and in vitro assays, and also significantly suppressed proliferation of MCF-7 and MDA-MB-231 human breast cancer cell lines...
June 15, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28623029/efficacy-of-plga-microparticle-encapsulated-formalin-killed-aeromonas-hydrophila-cells-as-a-single-shot-vaccine-against-a-hydrophila-infection
#16
Saekil Yun, Jin Woo Jun, Sib Sankar Giri, Hyoun Joong Kim, Cheng Chi, Sang Geun Kim, Sang Wha Kim, Se Chang Park
Control and prevention of disease is a high priority in aquaculture, and vaccination is important to prevent outbreaks. Here, poly(d,l-lactide-co-glycolic acid) (PLGA) microparticles (MPs) approximately 36μm in diameter were used to encapsulate and deliver Aeromonas hydrophila formalin-killed cells (FKC) as an antigen, and the innate and adaptive immune responses of cyprinid loaches and common carp were assessed following vaccination. The antigen was confirmed to be well encapsulated by scanning electron microscopy analysis of PLGA MP sections...
June 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28622824/toxicological-assessment-of-nano-and-micron-sized-tungsten-oxide-after-28days-repeated-oral-administration-to-wistar-rats
#17
Srinivas Chinde, Paramjit Grover
Tungsten oxide (WO3) nanoparticles (NPs) are being used in various applications. However, the health consequences of WO3 NPs exposure have not been explored extensively. Hence, the goal of this study was to evaluate the toxicity of WO3 NPs and their microparticles (MPs) after 28days repeated oral administration in Wistar rats. The particles were characterised by transmission electron microscopy (TEM), dynamic light scattering (DLS), laser Doppler velocimetry (LDV), Brunner-Emmett-Teller (BET), X- ray diffraction (XRD), and inductively coupled plasma optical emission spectrometer (ICP-OES)...
July 2017: Mutation Research
https://www.readbyqxmd.com/read/28621974/continuous-matrix-product-states-for-quantum-fields-an-energy-minimization-algorithm
#18
Martin Ganahl, Julián Rincón, Guifre Vidal
The generalization of matrix product states (MPS) to continuous systems, as proposed in the breakthrough Letter of Verstraete and Cirac [Phys. Rev. Lett. 104, 190405 (2010).PRLTAO0031-900710.1103/PhysRevLett.104.190405], provides a powerful variational ansatz for the ground state of strongly interacting quantum field theories in one spatial dimension. A continuous MPS (cMPS) approximation to the ground state can be obtained by simulating a Euclidean time evolution. In this Letter we propose a cMPS optimization algorithm based instead on energy minimization by gradient methods and demonstrate its performance by applying it to the Lieb-Liniger model (an integrable model of an interacting bosonic field) directly in the thermodynamic limit...
June 2, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28620710/investigation-of-some-disinfection-chemicals-and-water-quality-parameters-in-swimming-pools-in-the-city-center-and-districts-of-canakkale-turkey
#19
Tolga Uysal, Selehattin Yilmaz, Muhammet Turkoglu, Murat Sadikoglu
In this study, the variations in concentrations of some disinfection chemicals such as cyanuric acid (CyA), free chlorine (FC), and residual chlorine (RC), which affect human health, were investigated in the water of swimming pools. In addition, quality parameters such as temperature, pH, and total alkalinity (TA) in 44 swimming pools located in the city center and districts of Canakkale, Turkey, were examined in the summer period. While FC and RC amounts were analyzed using tablet tests with N-N-diethyl phenylenediamine (DPD 1) and potassium iodine (DPD 3) using the colorimetric method in the comparator, TA and CyA levels were measured with a photometric method...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28620130/circulating-microparticles-are-prognostic-biomarkers-in-advanced-non-small-cell-lung-cancer-patients
#20
Chin-Chou Wang, Chia-Cheng Tseng, Huang-Chih Chang, Kuo-Tung Huang, Wen-Feng Fang, Yu-Mu Chen, Cheng-Ta Yang, Chang-Chun Hsiao, Meng-Chih Lin, Chi-Kung Ho, Hon-Kan Yip
We investigated whether circulating microparticles (MPs) could serve as prognostic biomarkers in non-small cell lung cancer (NSCLC) patients. We enrolled 25 control subjects and 136 NSCLC patients categorized into disease-progression (DP, n=42) and disease-control (DC, n=94) groups. Flow cytometric analysis showed that levels of four types of circulating microparticles (EDAc-MPs, EDAp-MPs, PDAc-MPs and PDAp-MPs) were higher in the study patients than the control subjects (P < 0.04). DP patients showed poor initially performance status and more non-adenocarcinomas than DC patients...
June 6, 2017: Oncotarget
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