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https://www.readbyqxmd.com/read/29454254/exploration-research-on-synthesis-and-application-of-a-new-dye-containing-di-2-picolyamine
#1
Huihui Zhang, Zeyue Wei, Ying Xia, Min Fang, Weiju Zhu, Xingyuan Yang, Fei Li, Yupeng Tian, Xuanjun Zhang, Hongping Zhou
A newly designed fluorescence dye L based on di-2-picolyamine (DPA) moiety as a chelator was obtained under the protection of N 2 at 120°C, and KI as catalyst with relatively better yield. More interestingly, L not only could selectively and sensitively detect Cu 2+ ions in aqueous medium but also examine the Cu 2+ ions of the actual water samples. Nevertheless, L could be visual in Hela cells with excellent cell permeability, viz, monitoring exogenous Cu 2+ ions as well as realizing an "on-off-on" process...
February 9, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29454232/effects-of-mine-tailing-and-mixed-contamination-on-metals-trace-elements-accumulation-and-histopathology-of-the-chub-squalius-cephalus-tissues-evidence-from-three-differently-contaminated-sites-in-serbia
#2
Božidar Rašković, Vesna Poleksić, Stefan Skorić, Katarina Jovičić, Slađana Spasić, Aleksandar Hegediš, Nebojša Vasić, Mirjana Lenhardt
Chub (Squalius cephalus) specimens were collected in Korenita River seven months after spillover from the waste water of antimony mine tailing pond and compared with chub living in Kruščica reservoir (intended for water supply) and Međuvršje reservoir (influenced by intense emission of industrial, urban and rural wastewater). Concentrations of 15 elements (Al, As, B, Ba, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Si, Sr, Zn) were determined in muscle, liver and gills of chub by inductively coupled plasma optical spectrometry (ICP-OES) and histopathological alterations in liver and gills were assessed...
February 14, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29454211/seasonality-water-use-and-community-management-of-water-systems-in-rural-settings-qualitative-evidence-from-ghana-kenya-and-zambia
#3
Emma Kelly, Katherine F Shields, Ryan Cronk, Kristen Lee, Nikki Behnke, Tori Klug, Jamie Bartram
The sustainability of rural, community-managed water systems in sub-Saharan Africa depends in part on the ability of local water committees to repair breakdowns and carry out the operation and maintenance (O&M) of the system. Much of sub-Saharan Africa has two distinct seasons that affect the availability of water sources and how people use water. Little is known about how seasonality affects water system management. This qualitative study is based on 320 interviews and focus group discussions and examines the effects of season on community water use and management in Ghana, Kenya and Zambia...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29453717/u-tube-based-near-surface-environmental-monitoring-in-the-shenhua-carbon-dioxide-capture-and-storage-ccs-project
#4
Qi Li, Ranran Song, Hui Shi, Jianli Ma, Xuehao Liu, Xiaochun Li
The CO 2 injected into deep formations during implementation of carbon dioxide (CO 2 ) capture and storage (CCS) technology may leak and migrate into shallow aquifers or ground surfaces through a variety of pathways over a long period. The leaked CO 2 can threaten shallow environments as well as human health. Therefore, almost all monitoring programs for CCS projects around the world contain near-surface monitoring. This paper presents a U-tube based near-surface monitoring technology focusing on its first application in the Shenhua CCS demonstration project, located in the Ordos Basin, Inner Mongolia, China...
January 27, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29453578/a-stopped-flow-light-scattering-methodology-for-assessing-the-osmotic-water-permeability-of-whole-sertoli-cells
#5
Anna Maggio, Raquel L Bernardino, Patrizia Gena, Marco G Alves, Pedro F Oliveira, Giuseppe Calamita
Movement of water into and out of the cell is fundamental to life. In the male reproductive tract, at the level of the seminiferous epithelium, Sertoli cells are pivotal in mediating the movement of water into the luminal compartment, a process providing a means of transport of spermatozoa into the epididymal ducts. Here, we describe a stopped-flow light-scattering methodology to easily assess the Sertoli cell osmotic water permeability. The devised methodology is well suited for studying how the Sertoli cell's permeability changes following exogenous stimuli...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29453439/working-memory-and-brain-tissue-microstructure-white-matter-tract-integrity-based-on-multi-shell-diffusion-mri
#6
Sohae Chung, Els Fieremans, Nuri E Kucukboyaci, Xiuyuan Wang, Charles J Morton, Dmitry S Novikov, Joseph F Rath, Yvonne W Lui
Working memory is a complex cognitive process at the intersection of sensory processing, learning, and short-term memory and also has a general executive attention component. Impaired working memory is associated with a range of neurological and psychiatric disorders, but very little is known about how working memory relates to underlying white matter (WM) microstructure. In this study, we investigate the association between WM microstructure and performance on working memory tasks in healthy adults (right-handed, native English speakers)...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453425/chronic-treatment-with-fluoride-affects-the-jejunum-insights-from-proteomics-and-enteric-innervation-analysis
#7
Aline Salgado Dionizio, Carina Guimarães Souza Melo, Isabela Tomazini Sabino-Arias, Talita Mendes Silva Ventura, Aline Lima Leite, Sara Raquel Garcia Souza, Erika Xavier Santos, Alessandro Domingues Heubel, Juliana Gadelha Souza, Juliana Vanessa Colombo Martins Perles, Jacqueline Nelisis Zanoni, Marília Afonso Rabelo Buzalaf
Gastrointestinal symptoms are the first signs of fluoride (F) toxicity. In the present study, the jejunum of rats chronically exposed to F was evaluated by proteomics, as well as by morphological analysis. Wistar rats received water containing 0, 10 or 50 mgF/L during 30 days. HuC/D, neuronal Nitric Oxide (nNOS), Vasoactive Intestinal Peptide (VIP), Calcitonin Gene Related Peptide (CGRP), and Substance P (SP) were detected in the myenteric plexus of the jejunum by immunofluorescence. The density of nNOS-IR neurons was significantly decreased (compared to both control and 10 mgF/L groups), while the VIP-IR varicosities were significantly increased (compared to control) in the group treated with the highest F concentration...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453267/plant-microbe-and-abiotic-factors-influencing-salmonella-survival-and-growth-on-alfalfa-sprouts-and-swiss-chard-microgreens
#8
Elizabeth Reed, Christina M Ferreira, Rebecca Bell, Eric W Brown, Jie Zheng
Microgreens, like sprouts, are relatively fast growing, and generally consumed raw. Moreover, as observed in sprouts, microbial contamination from preharvest sources could also be present in the production of microgreens. In this study, two Salmonella enterica serovars (Hartford and Cubana) applied, at multiple inoculation levels, were evaluated for survival and growth on alfalfa sprouts and Swiss chard microgreens using the most probable number (MPN) method. Various abiotic factors were also examined for their effects on Salmonella survival and growth on sprouts and microgreens...
February 16, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29453120/mycobiota-and-co-occurrence-of-mycotoxins-in-south-african-maize-based-opaque-beer
#9
Ifeoluwa Adekoya, Adewale Obadina, Cynthia Chilaka Adaku, Marthe De Boevre, Sheila Okoth, Sarah De Saeger, Patrick Njobeh
Beer, a beverage consumed throughout the world, is mainly derived from cereals. In this study, fungal and mycotoxin contamination, as well as the physicochemical properties of maize-based opaque beer (umqombothi) obtained from the Gauteng province of South Africa, was investigated. The mean water activity, pH and total titratable acidity of the analysed beer samples were 0.91, 3.76 and 1.20% lactic acid, respectively. The investigation revealed Aspergillus, Penicillium, Phoma and Saccharomyces as the predominant fungal genera with a mean fungal load of 3...
February 9, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29452767/uptake-and-distribution-of-organo-iodine-in-deep-sea-corals
#10
Nancy G Prouty, E Brendan Roark, Leslye M Mohon, Ching-Chih Chang
Understanding iodine concentration, transport, and bioavailability is essential in evaluating iodine's impact to the environment and its effectiveness as an environmental biogeotracer. While iodine and its radionuclides have proven to be important tracers in geologic and biologic studies, little is known about transport of this element to the deep sea and subsequent uptake in deep-sea coral habitats. Results presented here on deep-sea black coral iodine speciation and iodine isotope variability provides key information on iodine behavior in natural and anthropogenic environments, and its geochemical pathway in the Gulf of Mexico...
February 13, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29452589/does-additional-support-provided-through-e-mail-or-sms-in-a-web-based-social-marketing-program-improve-children-s-food-consumption-a-randomized-controlled-trial
#11
Natalie Rangelov, Sara Della Bella, Pedro Marques-Vidal, L Suzanne Suggs
BACKGROUND: The FAN Social Marketing program was developed to improve dietary and physical activity habits of families with children in Ticino, Switzerland. The aim of this study was to examine if the effects of the program on children's food intake differed by intervention group. METHODS: Effects of the FAN program were tested through a Randomized Controlled Trial. The program lasted 8 weeks, during which participants received tailored communication about nutrition and physical activity...
February 16, 2018: Nutrition Journal
https://www.readbyqxmd.com/read/29452584/high-phosphorus-intake-and-gut-related-parameters-results-of-a-randomized-placebo-controlled-human-intervention-study
#12
Ulrike Trautvetter, Amélia Camarinha-Silva, Gerhard Jahreis, Stefan Lorkowski, Michael Glei
BACKGROUND: In recent years, high phosphate intakes were discussed critically. In the small intestine, a part of the ingested phosphate and calcium precipitates to amorphous calcium phosphate (ACP), which in turn can precipitate other intestinal substances, thus leading to a beneficial modulation of the intestinal environment. Therefore, we analysed faecal samples obtained from a human intervention study regarding gut-related parameters. METHODS: Sixty-two healthy subjects (men, n = 30; women, n = 32) completed the double-blind, placebo-controlled and parallel designed study (mean age: 29 ± 7 years; mean BMI: 24 ± 3 kg/m 2 )...
February 16, 2018: Nutrition Journal
https://www.readbyqxmd.com/read/29452488/picosecond-proton-transfer-kinetics-in-water-revealed-with-ultrafast-ir-spectroscopy
#13
William B Carpenter, Joseph A Fournier, Nicholas H C Lewis, Andrei Tokmakoff
Aqueous proton transport involves the ultrafast interconversion of hydrated proton species that are closely linked to the hydrogen bond dynamics of water, which has been a long-standing challenge to experiments. In this paper, we use ultrafast IR spectroscopy to investigate the distinct vibrational transition centered at 1750 cm-1 in strong acid solutions, which arises from bending vibrations of the hydrated proton complex. Broadband ultrafast 2D IR spectroscopy and transient absorption are used to measure vibrational relaxation, spectral diffusion, and orientational relaxation dynamics...
February 16, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29452181/the-demosponge-pseudoceratina-purpurea-as-a-new-source-of-fibrous-chitin
#14
Sonia Żółtowska-Aksamitowska, Mikhail Tsurkan, Swee-Cheng Lim, Heike Meissner, Konstantin Tabachnick, Lamiaa A Shaala, Diaa T A Youssef, Viatcheslav N Ivanenko, Iaroslav Petrenko, Marcin Wysokowski, Nicole Bechmann, Yvonne Joseph, Teofil Jesionowski, Hermann Ehrlich
Among marine demosponges (Porifera: Demospongiae), only representatives of the order Verongiida have been recognized to synthetize both biologically active substances as well as scaffolds-like fibrous skeletons made of structural aminopolysaccharide chitin. The unique 3D architecture of such scaffolds open perspectives for their applications in waste treatment, biomimetics and tissue engineering. Here, we focus special attention to the demosponge Pseudoceratina purpurea collected in the coastal waters of Singapore...
February 13, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29452113/technological-innovation-strategies-for-the-specific-treatment-of-chagas-disease-based-on-benznidazole
#15
REVIEW
Leslie Raphael de Moura Ferraz, Alinne Élida Gonçalves Alves, Débora Dolores Souza da Silva Nascimento, Isabela Araújo E Amariz, Aline Silva Ferreira, Salvana Priscylla Manso Costa, Larissa Araújo Rolim, Ádley Antonini Neves de Lima, Pedro José Rolim Neto
Caused by Trypanosoma cruzi, Chagas disease is responsible for public health problems greater in magnitude than those attributed to malaria, schistosomiasis, or leishmaniasis. A factor in the socioeconomic development of poor countries, Chagas disease can cause death due to a high parasitic burden during its acute phase due and irreversible damage in organs such as the heart, esophagus, and colon during its chronic phase, even when the number of parasites is minimal. For treating Chagas disease, benznidazole (BNZ) remains the drug of choice and, in Latin America, the only drug on the market for treating the disease...
February 13, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29451793/temporary-anion-states-of-ethene-interacting-with-single-molecules-of-methane-ethane-and-water
#16
Thomas Sommerfeld, Joshua B Melugin, Masahiro Ehara
When an excess electron is added into the π* orbital of ethene, the resulting anion decays by electron autodetachment---that is, it represents an electronic state referred to as a temporary anion or resonance state. Here the influence of a cluster environment on the energy and lifetime of this state is investigated. The clusters considered are ethene...CH 4 , ethene...C 2 H 6 , and ethene...H 2 O. Most of these clusters are systematically constructed so that the solvent interacts with the π system in a specific way, and are thus by construction not minima with respect to all intermolecular degrees of freedom...
February 16, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29451787/effect-of-methyl-substitution-on-the-n-h%C3%A2-%C3%A2-%C3%A2-o-interaction-in-complexes-of-pyrrole-with-water-methanol-and-dimethyl-ether-matrix-isolation-infrared-spectroscopy-and-ab-initio-computational-studies
#17
Shubhra Sarkar, Nagarajan Ramanathan, Kalyanasundaram Sundararajan
Hydrogen bonded interactions of pyrrole with water and methanol have been studied using matrix isolation infrared spectroscopy and compared with the calculation performed on dimethyl ether. Computations carried out at MP2/aug-cc-pVDZ level of theory yielded two minima for the pyrrole-water and pyrrole-methanol complexes. The global and local minima correspond to the N-H∙∙∙O and O-H∙∙∙π complexes, respectively, where the N-H group of pyrrole interacts with oxygen of water/methanol and O-H of water and methanol interacts with the π cloud of pyrrole...
February 16, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29450770/how-can-water-quality-be-improved-when-the-urban-waste-water-directive-has-been-fulfilled-a-case-study-of-the-lot-river-france
#18
Josette Garnier, Antsiva Ramarson, Vincent Thieu, Julien Némery, Sylvain Théry, Gilles Billen, Alexandra Coynel
The Lot river, a major tributary of the downstream Garonne river, the largest river on the Northern side of the Pyrenees Mountains, was intensively studied in the 1970s. A pioneering program called "Lot Rivière Claire" provided a diagnosis of water quality at the scale of the whole watershed and proposed an ambitious program to manage nutrient pollution and eutrophication largely caused by urban wastewater releases. Later on, the implementation of European directives from 1991 to 2000 resulted in the nearly complete treatment of point sources of pollution in spite of a doubling of the basin's population...
February 15, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29450431/gas-phase-kinetics-modifies-the-ccn-activity-of-a-biogenic-soa
#19
A E Vizenor, A A Asa-Awuku
Our current knowledge of cloud condensation nuclei (CCN) activity and the hygroscopicity of secondary organic aerosol (SOA) depends on the particle size and composition, explicitly, the thermodynamic properties of the aerosol solute and subsequent interactions with water. Here, we examine the CCN activation of 3 SOA systems (2 biogenic single precursor and 1 mixed precursor SOA system) in relation to gas-phase decay. Specifically, the relationship between time, gas-phase precursor decay and CCN activity of 100 nm SOA is studied...
February 16, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29449959/sulfobetaine-methacrylate-hydrogel-coated-anti-fouling-surfaces-for-implantable-biomedical-devices
#20
Se Yeong Lee, Yunki Lee, Phuong Le Thi, Dong Hwan Oh, Ki Dong Park
Background: Zwitterionic molecules have been widely studied as coating materials for preparing anti-fouling surfaces because they possess strong hydration properties that can resist non-specific protein adsorption. Numerous studies on surface modification using zwitterionic molecules have been investigated, such as electrochemically mediated and photoinitiated radical polymerization. However, these methods have some limitations, including multi-step process, difficulties in producing thick and dense layers as well as the requirement of extra facilities...
2018: Biomaterials Research
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