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https://www.readbyqxmd.com/read/28815882/application-of-chitosan-microparticles-for-mitigation-of-salmonella-in-agricultural-water
#1
Ying Fan, Amber Ginn, M Kang, Kwang Cheol Jeong, Anita C Wright
AIM: The activity of chitosan microparticles (CM) was examined using a matrix of conditions in order to assess the efficacy of CM as a mitigation against various strains of Salmonella enterica in agricultural water. METHODS AND RESULTS: Different concentrations of CM (0, 0.01, 0.1, 0.2, 0.3% w/v) were examined for antimicrobial activity against log vs. stationary phase cells of Salmonella and at different conditions of temperature, salinity, and pH. Results showed greatest activity with 0...
August 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28812356/single-molecule-nanopore-spectrometry-for-peptide-detection
#2
Amy E Chavis, Kyle T Brady, Grace A Hatmaker, Christopher E Angevine, Nuwan Kothalawala, Amala Dass, Joseph W F Robertson, Joseph E Reiner
Sensing and characterization of water-soluble peptides is of critical importance in a wide variety of bioapplications. Single molecule nanopore spectrometry (SMNS) is based on the idea that one can use biological protein nanopores to resolve different sized molecules down to limits set by the blockade duration and noise. Previous work has shown that this enables discrimination between polyethylene glycol (PEG) molecules that differ by a single monomer unit. This paper describes efforts to extend SMNS to a variety of biologically relevant, water-soluble peptides...
August 16, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28812090/zero-charged-catanionic-lamellar-liquid-crystals-doped-with-fullerene-c60-for-potential-applications-in-tribology
#3
Mengjun Chen, Baoyong Liu, Xiaolin Wang, Yanxu Fu, Jingcheng Hao, Hongguang Li
The formation of lamellar liquid crystals (LLCs) has been demonstrated in a few salt-free catanionic surfactant systems and their properties have been well documented. However, examples of their combination with other materials are relatively rare. Herein, a salt-free zero-charged catanionic surfactant with low chain melting temperature was prepared by mixing equimolar tetradecyltrimethylammonium oxide (TTAOH) and oleic acid (OA) in water, and its concentration-dependent aggregate transition was investigated...
August 16, 2017: Soft Matter
https://www.readbyqxmd.com/read/28811735/asian-american-dietary-sources-of-sodium-and-salt-behaviors-compared-with-other-racial-ethnic-groups-nhanes-2011-2012
#4
Melanie J Firestone, Jeannette M Beasley, Simona C Kwon, Jiyoung Ahn, Chau Trinh-Shevrin, Stella S Yi
OBJECTIVE: Asian Americans consume more sodium than other racial/ethnic groups. The purpose of this analysis was to describe major sources of sodium intake to inform sodium reduction initiatives. METHODS: Cross-sectional data on adults (aged >18 years) from the National Health and Nutrition Examination Survey (NHANES) 2011-2012 with one 24-hour dietary recall were analyzed (n=5,076). Population proportions were calculated from "What We Eat in America" (WWEIA) food categories...
2017: Ethnicity & Disease
https://www.readbyqxmd.com/read/28811124/two-cap-residues-in-the-s1-subsite-of-a-plasmodium-falciparum-m1-family-aminopeptidase-promote-broad-specificity-and-enhance-catalysis
#5
Matthew Rosati, Seema Dalal, Michael Klemba
The aminopeptidase PfA-M1 is a key contributor to peptide catabolism in the human malaria parasite Plasmodium falciparum. PfA-M1 substrate specificity is shaped by the cylindrical S1 subsite, which accommodates the sidechain of the substrate P1 residue. At the top of the S1 subsite are two "cap" residues, E572 and M1034, that are positioned to influence S1 subsite specificity. In this study, we have mutated the cap residues, individually and together, and have evaluated the effects on PfA-M1 specificity and catalytic efficiency...
August 12, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/28809812/the-healthy-eating-agenda-in-australia-is-salt-a-priority-for-manufacturers
#6
Rebecca Lindberg, Tyler Nichols, Chrystal Yam
Many nation states have endorsed and acted on the World Health Organization's target of a 30% reduction in global salt consumption by 2025. In Australia, new government-led voluntary measures were initiated in 2009, consisting of public-private partnerships, front-of-pack labelling, and food reformulation targets (which include reduced salt). How Australia's private sector has responded to this healthy eating agenda has been investigated in a limited way, particularly with regards to manufacturers which produce processed foods considered significant sources of sodium...
August 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28806351/effects-of-a-nationwide-strategy-to-reduce-salt-intake-in-samoa
#7
Kathy Trieu, Merina Ieremia, Joseph Santos, Bruce Neal, Mark Woodward, Marj Moodie, Colin Bell, Wendy Snowdon, Taiaopo Faumuina, Jacqui Webster
OBJECTIVE: Salt reduction is one of the most cost-effective interventions for the prevention of noncommunicable diseases, but there are no studies evaluating the effectiveness of national strategies in low or lower middle income countries. This study aimed to examine the effect of an 18-month nation-wide salt reduction strategy in Samoa. METHODS: Two nationally representative cross-sectional surveys of adults aged 18-64 years, measuring 24-h urinary salt excretion and salt-related knowledge, attitudes and behaviours, were conducted before (2013) and after (2015) the intervention...
August 12, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28805727/leaf-physiological-and-proteomic-analysis-to-elucidate-silicon-induced-adaptive-response-under-salt-stress-in-rosa-hybrida-rock-fire
#8
Prabhakaran Soundararajan, Abinaya Manivannan, Chung Ho Ko, Sowbiya Muneer, Byoung Ryong Jeong
Beneficial effects of silicon (Si) on growth and development have been witnessed in several plants. Nevertheless, studies on roses are merely reported. Therefore, the present investigation was carried out to illustrate the impact of Si on photosynthesis, antioxidant defense and leaf proteome of rose under salinity stress. In vitro-grown, acclimatized Rosa hybrida 'Rock Fire' were hydroponically treated with four treatments, such as control, Si (1.8 mM), NaCl (50 mM), and Si+NaCl. After 15 days, the consequences of salinity stress and the response of Si addition were analyzed...
August 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28805678/sodium-chloride-and-its-influence-on-the-aroma-profile-of-yeasted-bread
#9
Markus C E Belz, Claudia Axel, Jonathan Beauchamp, Emanuele Zannini, Elke K Arendt, Michael Czerny
The impact of sodium chloride (NaCl) concentration on the yeast activity in bread dough and its influence on the aroma profile of the baked bread was investigated. Key aroma compounds in the bread samples were analysed by two-dimensional high-resolution gas chromatography-mass spectrometry in combination with solvent-assisted flavour evaporation distillation. High-sensitivity proton-transfer-reaction mass spectrometry was used to detect and quantify 2-phenylethanol in the headspace of the bread dough during fermentation...
August 12, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28805218/electrochemical-de-lithiation-of-silver-ferrite-and-composites-mechanistic-insights-from-ex-situ-in-situ-and-operando-x-ray-techniques
#10
Jessica L Durham, Alexander B Brady, Christina A Cama, David C Bock, Christopher J Pelliccione, Qing Zhang, Mingyuan Ge, Yue Ru Li, Yiman Zhang, Hanfei Yan, Xiaojing Huang, Yong Chu, Esther S Takeuchi, Kenneth J Takeuchi, Amy C Marschilok
The structure of pristine AgFeO2 and phase makeup of Ag0.2FeO1.6 (a one-pot composite comprised of nanocrystalline stoichiometric AgFeO2 and amorphous γ-Fe2O3 phases) was investigated using synchrotron X-ray diffraction. A new stacking-fault model was proposed for AgFeO2 powder synthesized using the co-precipitation method. The lithiation/de-lithiation mechanisms of silver ferrite, AgFeO2 and Ag0.2FeO1.6 were investigated using ex situ, in situ, and operando characterization techniques. An amorphous γ-Fe2O3 component in the Ag0...
August 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28804493/a-comprehensive-biophysical-model-of-ion-and-water-transport-in-plant-roots-i-clarifying-the-roles-of-endodermal-barriers-in-the-salt-stress-response
#11
Kylie J Foster, Stanley J Miklavcic
In this paper, we present a detailed and comprehensive mathematical model of active and passive ion and water transport in plant roots. Two key features are the explicit consideration of the separate, but interconnected, apoplastic, and symplastic transport pathways for ions and water, and the inclusion of both active and passive ion transport mechanisms. The model is used to investigate the respective roles of the endodermal Casparian strip and suberin lamellae in the salt stress response of plant roots. While it is thought that these barriers influence different transport pathways, it has proven difficult to distinguish their separate functions experimentally...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28802284/simple-questions-in-salt-intake-behavior-assessment-comparison-with-urinary-sodium-excretion-in-japanese-adults
#12
Ken Uechi, Keiko Asakura, Yuki Sasaki, Shizuko Masayasu, Satoshi Sasaki
BACKGROUND AND OBJECTIVES: To clarify whether six conventional 'high-risk' behaviors toward excess salt intake captured by simple questions such as frequency of salty food consumption are related to actual salt intake. Also, to examine the relationship of nutrition knowledge, food label use, and food preparation with actual salt intake. METHODS AND STUDY DESIGN: Study participants were 742 subjects (370 men and 372 women) aged 20-69 years from 20 areas of Japan...
2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28800936/associations-between-dietary-salt-potassium-and-blood-pressure-in%C3%A2-south-african-adults-who-sage-wave-2-salt-tobacco
#13
L J Ware, K Charlton, A E Schutte, M Cockeran, N Naidoo, P Kowal
BACKGROUND & AIMS: In June 2016, South Africa implemented legislation mandating maximum sodium levels in a range of processed foods with a goal of reducing population salt intake and disease burden from hypertension. Our aim was to explore the relationship between salt and blood pressure (BP) in a subsample of the World Health Organization Study on global AGEing and adult health (SAGE) Wave 2 before implementation of legislation in South Africa. METHODS & RESULTS: Blood pressure (BP) was measured in triplicate (n = 2722; median age 56 years; 33% male) and 24-h urine collected in a nested subsample (n = 526) for sodium, potassium and creatinine analysis...
July 8, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28800558/aqds-immobilized-solid-phase-redox-mediators-and-their-role-during-bioelectricity-generation-and-rr2-decolorization-in-air-cathode-single-chamber-microbial-fuel-cells
#14
Claudia M Martinez, Xiuping Zhu, Bruce E Logan
The application of immobilized redox mediators (RMs) in microbial fuel cells (MFCs) is an emerging technology for electricity generation with simultaneous azo dye decolorization due to facilitated electrons transfer from bacteria to anodes and azo dyes. The use of immobilized RMs avoids the requirement of their continuous dosing in MFCs, which has been the main limitation for practical applications. Two strategies of anthraquinones-2,6-disulphonic salt (AQDS) immobilization, AQDS immobilized with polyvinyl alcohol particles and AQDS immobilized on anodes by electropolymerization, were evaluated and compared to achieve simultaneous reactive red 2 (RR2) dye reduction and bioelectricity generation...
July 26, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28800554/anthraquinone-2-sulfonate-immobilized-to-conductive-polypyrrole-hydrogel-as-a-bioanode-to-enhance-power-production-in-microbial-fuel-cell
#15
Xinhua Tang, How Yong Ng
In this study, anthraquinone-2-sulfonate (AQS), a redox mediator, was covalently bound to conductive polypyrrole hydrogel (CPH) via electrochemical reduction of the in-situ-generated AQS diazonium salts. The porous structure and hydrophilic surface of this CPH/AQS anode enhanced biofilm formation while the AQS bound on the CPH/AQS anode worked as a redox mediator. The CPH/AQS bioanode reduced the charge transfer resistance from 28.3Ω to 4.1Ω while increased the maximum power density from 762±37mW/m(2) to 1919±69mW/m(2), compared with the bare anode...
August 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28800234/synthesis-of-benzoxazoles-using-electrochemically-generated-hypervalent-iodine
#16
Olesja Koleda, Timo Broese, Jan Noetzel, Michael Roemelt, Edgars Suna, Robert Francke
The indirect ("ex-cell") electrochemical synthesis of benzoxazoles from imines using a redox mediator based on the iodine(I)/iodine(III) redox couple is reported. Tethering the redox active iodophenyl subunit to a tetra alkylammonium moiety allowed for anodic oxidation to be performed without supporting electrolyte. The mediator salt can be easily recovered and reused. Our "ex-cell" approach toward the electrosynthesis of benzoxazoles is compatible with a range of redox sensitive functional groups. An unprecedented concerted reductive elimination mechanism for benzoxazole formation is proposed on the basis of control experiments and DFT calculations...
August 11, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28798736/escherichia-coli-o157-h7-acid-sensitivity-correlates-with-flocculation-phenotype-during-nutrient-limitation
#17
Kathryn L Kay, Frederick Breidt, Pina M Fratamico, Gian M Baranzoni, Gwang-Hee Kim, Amy M Grunden, Deog-Hwan Oh
Shiga toxin producing Escherichia coli (STEC) strains vary in acid resistance; however, little is known about the underlying mechanisms that result in strain specific differences. Among 25 STEC O157:H7 strains tested, 7 strains flocculated when grown statically for 18 h in minimal salts medium at 37°C, while 18 strains did not. Interestingly, the flocculation phenotype (cells came out of suspension) was found to correlate with degree of acid sensitivity in an assay with 400 mM acetic acid solution at pH 3...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28795885/the-influence-of-amniotic-membrane-extracts-on-cell-growth-depends-on-the-part-of-membrane-and-childbirth-mode-selected-a-proof-of-concept-study
#18
M Litwiniuk, M Radowicka, A Krejner, T Grzela
OBJECTIVE: The amniotic membrane (AM) is a rich source of biologically active factors, important for wound healing and is widely used in various clinical applications, including tissue engineering, reconstructive surgery and wound management. The aim of the present proof-of-concept study was to assess the influence of amniotic membrane extracts on in vitro proliferation of main cells involved in tissue regeneration. The assessment was done in regards to the content of selected biologically active factors in amniotic membrane extracts...
August 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28792432/a-unique-3d-nitrogen-doped-carbon-composite-as-high-performance-oxygen-reduction-catalyst
#19
Ramesh Karunagaran, Tran Thanh Tung, Cameron Shearer, Diana Tran, Campbell Coghlan, Christian Doonan, Dusan Losic
The synthesis and properties of an oxygen reduction catalyst based on a unique 3-dimensional (3D) nitrogen doped (N-doped) carbon composite are described. The composite material is synthesised via a two-step hydrothermal and pyrolysis method using bio-source low-cost materials of galactose and melamine. Firstly, the use of iron salts and galactose to hydrothermally produceiron oxide (Fe₂O₃) magnetic nanoparticle clusters embedded carbon spheres. Secondly, magnetic nanoparticles diffused out of the carbon sphere when pyrolysed in the presence of melamine as nitrogen precursor...
August 9, 2017: Materials
https://www.readbyqxmd.com/read/28791824/anti-enterococcal-activities-of-pentacyclic-triterpenes
#20
Dorota Wojnicz, Dorota Tichaczek-Goska, Kamila Korzekwa, Marta Kicia, Andrzej Hendrich
BACKGROUND: Asiatic (AA) and ursolic (UA) acids are widely studied phytochemicals, but their antimicrobial properties are still poorly understood. Therefore our research has focused on their activity against uropathogenic Enterococcus faecalis strains. OBJECTIVES: The aim of this research was to determine the influence of AA and UA on the growth, cell morphology, virulence factors and biofilm formation by E. faecalis strains. MATERIAL AND METHODS: AA and UA were purchased from Sigma-Aldrich...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
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