keyword
MENU ▼
Read by QxMD icon Read
search

Surface water

keyword
https://www.readbyqxmd.com/read/29141237/influence-of-sewage-treatment-plant-effluent-discharge-into-multipurpose-river-on-its-water-quality-a-quantitative-health-risk-assessment-of-cryptosporidium-and-giardia
#1
Shumin Xiao, Sike Hu, Yan Zhang, Xiaoyun Zhao, Wenwei Pan
Sewage treatment plants (STPs) are one of the sources of pathogens discharged into surface water. An investigation was carried out over the duration of 12 months in Henan Province, China, to evaluate the health influence of municipal wastewater effluent discharge on water quality of the receiving water. A discharge-based quantitative microbial risk assessment (QMRA) was employed, taking into account the vegetables consumption habits of the Chinese, population subgroups with different immune statuses and ages, to evaluate the incremental disease burden from agricultural irrigation and swimming exposure scenarios associated with increased concentration of the protozoan Cryptosporidium and/or Giardia in the receiving river...
November 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29141213/cpeb2-activates-grasp1-mrna-translation-and-promotes-ampa-receptor-surface-expression-long-term-potentiation-and-memory
#2
Wen-Hsin Lu, Nai-Hsing Yeh, Yi-Shuian Huang
Activity-dependent synthesis of plasticity-related proteins is necessary to sustain long-lasting synaptic modifications and consolidate memory. We investigated the role of the translational regulator cytoplasmic polyadenylation element binding protein 2 (CPEB2) in learning and memory because regulated mRNA translation contributes to synaptic plasticity. Forebrain-restricted CPEB2 conditional knockout (cKO) mice exhibited impaired hippocampus-dependent memory in contextual fear conditioning and Morris water maze tests...
November 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/29141147/a-water-soluble-galactose-decorated-cationic-photodynamic-therapy-agent-based-on-bodipy-to-selectively-eliminate-biofilm
#3
Xiaomei Dai, Xuelei Chen, Yu Zhao, Yunjian Yu, Xiaosong Wei, Xinge Zhang, Chaoxing Li
A multitude of serious chronic infections involved in bacterial biofilms that are difficult to eradicate. Here, a water-soluble galactose functionalized cationic 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based photodynamic therapy agent was synthesized for selectively eliminating the bacterial biofilm. These conjugates can capture bacteria to form aggregations through electrostatic interaction and then generate a large number of reactive oxygen species (ROS) under visible light irradiation to kill the bacteria without the emergence of bacterial resistance...
November 15, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/29141146/the-effect-of-pressure-and-temperature-on-mid-infrared-sensing-of-dissolved-hydrocarbons-in-water
#4
Charles Heath, Matthew B Myers, Bobby Pejcic
Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy using a polymer coated internal reflection element/waveguide is an established sensor platform for the detection of a range of organic and hydrocarbon molecules dissolved in water. The polymer coating serves two purposes: to concentrate hydrocarbons from the aqueous phase and to exclude water along with other interfering molecules from the surface of the internal reflection element. Crucial to reliable quantification and analytical performance is the calibration of the ATR-FTIR sensor which is commonly performed in water under mild ambient conditions (i...
November 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29140678/robust-superhydrophobic-carbon-nanotubes-film-with-lotus-leaf-mimetic-multi-scale-hierarchical-structures
#5
Pengwei Wang, Tianyi Zhao, Ruixin Bian, Guangyan Wang, Huan Liu
Superhydrophobic carbon nanotubes (CNTs) films have demonstrated many fascinating performances in versatile applications, especially for those involving solid/liquid interfacial processes, because of its ability in affecting the way of the material/energy transfer at interfaces. Thus, developing superhydrophobic CNTs has attracted extensively research interests in the past decades, and it could be achieved either by surface coating of inorganic/organic low-free energy materials or by constructing micro-/nano- hierarchical structures via various complicated processes...
November 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/29140287/interaction-between-diethyldithiocarbamate-and-cu-ii-on-gold-in-non-cyanide-wastewater
#6
Nguyễn Hoàng Ly, Thanh Danh Nguyen, Kyung-Duk Zoh, Sang-Woo Joo
A surface-enhanced Raman scattering (SERS) detection method for environmental copper ions (Cu(2+)) was developed according to the vibrational spectral change of diethyldithiocarbamate (DDTC) on gold nanoparticles (AuNPs). The ultraviolet-visible (UV-Vis) absorption spectra indicated that DDTC formed a complex with Cu(2+), showing a prominent peak at ~450 nm. We found Raman spectral changes in DDTC from ~1490 cm(-1) to ~1504 cm(-1) on AuNPs at a high concentration of Cu(2+) above 1 μM. The other ions of Zn(2+), Pb(2+), Ni(2+), NH₄⁺, Mn(2+), Mg(2+), K⁺, Hg(2+), Fe(2+), Fe(3+), Cr(3+), Co(2+), Cd(2+), and Ca(2+) did not produce such spectral changes, even after they reacted with DDTC...
November 15, 2017: Sensors
https://www.readbyqxmd.com/read/29140073/3-dimensional-enzyme-biohydrogel-electrode-for-improved-bioelectrocatalysis
#7
Ananta Ghimire, Ajith Pattammattel, Charles Maher, Rajeswari Kasi, Challa V Kumar
Higher loading of enzymes on electrode and efficient electron transfer from the enzyme to the electrode are urgently needed to enhance the current density of biofuel cells. The two-dimensional nature of electrode surface limits the enzyme loading on the surface and unfavorable interaction with electrode surfaces cause inactivation of the enzyme. Benign biohydrogels are designed here to address enzyme degradation and the three-dimensional nature of the biohydrogel enhanced the enzyme density per unit area. A general strategy is demonstrated here using a redox active enzyme glucose oxidase (GOx) embedded in bovine serum albumin (BSA) biohydrogel on flexible carbon cloth (CC) electrodes...
November 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29140072/novel-aerosol-phase-extraction-method-for-the-determination-of-ca-k-mg-and-na-in-biodiesel-through-inductively-coupled-plasma-atomic-emission-spectrometry
#8
Raquel Sanchez, Salvador Maestre, Maria Soledad Prats Moya, José Luis Todoli
A novel extraction method was developed, optimized and validated for the elemental analysis of organic samples. The method, called aerosol phase extraction (APE), was based on the nebulization of the extracting aqueous solution (0.1 mol L-1 nitric acid) on the sample. The extraction was performed at the interface of each generated extractant droplets as they entered in contact with the samples. Afterwards, the phases were allowed to separate and Ca, K, Na and Mg were determined in aqueous phase by means of inductively coupled plasma optical emission spectroscopy (ICP-OES)...
November 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29139620/changing-patterns-in-water-toxicity-associated-with-current-use-pesticides-in-three-california-agriculture-regions
#9
Brian S Anderson, Bryn M Phillips, Jennifer P Voorhees, Xin Deng, Jeff Geraci, Karen Worcester, Ron S Tjeerdema
Regulation of agriculture irrigation water discharges in California is assessed and controlled by its nine Regional Water Quality Control Boards under the jurisdiction of the California State Water Resources Control Board. Each Regional Water Board has developed programs to control pesticides in runoff as part of the waste discharge requirements implemented through each Region's Irrigated Lands Regulatory Program. This study assessed how pesticide use patterns differ in the Imperial (Imperial County), Salinas and Santa Maria (Monterey County) valleys, which host three of California's prime agriculture areas...
November 15, 2017: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/29139396/folic-acid-modified-pluronic-f127-coating-ag2s-quantum-dot-for-photoacoustic-imaging-of-tumor-cell-targeting
#10
Ruo-Yun Zhang, Zhao-Yang Wang, Xiao-Quan Yang, Yang Xuan, Kai Cheng, Cheng Li, Xian-Lin Song, Jie An, Xiao-Lin Hou, Yuan-Di Zhao
In this study, oil-soluble Ag2S quantum dot (QD) was synthesized through thermal decomposition of single-source precursor method, and Pluronic F127 (PF127), a triblock copolymer functionalized with folic acid (FA), was deposited on the surface of QD, then water-soluble PF127-FA@Ag2S nanoprobe with targeting ability was fabricated. The as-prepared PF127-FA@Ag2S exhibited spheroidal morphology and high dispersibility, with average diameters of 115 ± 20.7 nm (as observed by transmission electron microscopy). No obvious toxicity of PF127-FA@Ag2S nanoprobe was found in standard 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay and colony-formation assay, indicating that decent biocompatibility and safety...
November 15, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29139266/-effect-of-fluidized-bed-technology-on-micromeritics-properties-of-leonurus-herba-extract
#11
Yan Du, Qi-Zhi Yi, Yao-Kun Xiong, Lan-Ping Xu
Based on different binders, the Leonurus Herba extract powders were fluidized and modified. The physical properties such as hygroscopicity, flowability, filling property and compression property were studied by various micromeritics methods before and after modification. The results showed that the physical properties of Leonurus Herba extract were close to those of microcrystalline cellulose, and its comprehensive flow index was between 61-75. Fluidization process can improve hygroscopicity, so the moisture absorption indexes of the samples were significantly lower than those of the original Leonurus Herba extract samples...
August 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29139265/-stability-optimization-of-puerarin-nanocrystalline-self-stabilizied-pickering-emulsion-by-response-surface-methodology
#12
Ji-Fen Zhang, Jiao Zhang, Fan Wang, Shuai Wang, Mei Wang, Tao Yi
A new Pickering emulsion, puerarin nanocrystalline self-stabilized Pickering emulsion (Pu-NSSPE) was developed. Box-Behnken design was used for optimizing the preparation formulation of Pu-NSSPE to improve its stability, and the effects of concentration of puerarin, volume ratio of water to oil, and pH value of water phase on the stratification index of emulsion, droplet size and drug concentration in emulsion were investigated. Results showed that the optimized Pu-NSSPE could be prepared with the concentration of puerarin of 0...
August 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29139077/spatiotemporal-patterns-and-source-attribution-of-nitrogen-pollution-in-a-typical-headwater-agricultural-watershed-in-southeastern-china
#13
Wenjun Chen, Bin He, Daniel Nover, Weili Duan, Chuan Luo, Kaiyan Zhao, Wen Chen
Excessive nitrogen (N) discharge from agriculture causes widespread problems in aquatic ecosystems. Knowledge of spatiotemporal patterns and source attribution of N pollution is critical for nutrient management programs but is poorly studied in headwaters with various small water bodies and mini-point pollution sources. Taking a typical small watershed in the low mountains of Southeastern China as an example, N pollution and source attribution were studied for a multipond system around a village using the Hydrological Simulation Program-Fortran (HSPF) model...
November 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29139076/extended%C3%A2-spectrum%C3%A2-beta-lactamase-esbl-producing-bacteria-isolated-from-hospital-wastewaters-rivers-and-aquaculture-sources-in-nigeria
#14
Olawale Olufemi Adelowo, Serena Caucci, Omowunmi Abosede Banjo, Ozioma Chinyere Nnanna, Eunice Olubunmi Awotipe, Florence Bosede Peters, Obasola Ezekiel Fagade, Thomas U Berendonk
Untreated wastewater is a risk factor for the spread of antibiotic resistance in the environment. However, little is known about the contribution of untreated wastewater to the burden of antibiotic resistance in the Nigerian environment. In this study, a total of 143 ceftazidime-/cefpodoxime-resistant bacteria isolated from untreated wastewater and untreated wastewater-contaminated surface and groundwater in Nigeria were screened for extended-spectrum β-lactamase (ESBL) genes, integrons and integron gene cassettes by PCR...
November 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29138943/contaminants-of-emerging-concern-in-surface-waters-in-barbados-west-indies
#15
Quincy A Edwards, Sergei M Kulikov, Leah D Garner-O'Neale, Chris D Metcalfe, Tamanna Sultana
Contaminants of emerging concern (CECs), including pharmaceuticals, artificial sweeteners, steroid hormones, and current-use pesticides have been detected in surface waters around the world, but to date, there have been no reports in the peer-reviewed literature on the levels of these classes of contaminants in freshwater resources in the Caribbean region. In the present study, multi-residue solid phase extraction (SPE) and liquid chromatography with tandem mass spectroscopy (LC-MS/MS) were used to analyze grab samples of surface waters collected from five different watersheds in Barbados, West Indies...
November 14, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29138942/calculation-of-left-ventricular-volumes-and-ejection-fraction-from-dynamic-cardiac-gated-15-o-water-pet-ct-5d-pet
#16
Jonny Nordström, Tanja Kero, Hendrik Johannes Harms, Charles Widström, Frank A Flachskampf, Jens Sörensen, Mark Lubberink
BACKGROUND: Quantitative measurement of myocardial blood flow (MBF) is of increasing interest in the clinical assessment of patients with suspected coronary artery disease (CAD). (15)O-water positron emission tomography (PET) is considered the gold standard for non-invasive MBF measurements. However, calculation of left ventricular (LV) volumes and ejection fraction (EF) is not possible from standard (15)O-water uptake images. The purpose of the present work was to investigate the possibility of calculating LV volumes and LVEF from cardiac-gated parametric blood volume (V B) (15)O-water images and from first pass (FP) images...
November 14, 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/29138562/dual-uv-irradiation-based-metal-oxide-nanoparticles-for-enhanced-antimicrobial-activity-in-escherichia-coli-and-m13-bacteriophage
#17
Su-Eon Jin, Woochul Hwang, Hyo Jung Lee, Hyo-Eon Jin
Metal oxide (MO) nanoparticles have been studied as nano-antibiotics due to their antimicrobial activities even in antibiotic-resistant microorganisms. We hypothesized that a hybrid system of dual UV irradiation and MO nanoparticles would have enhanced antimicrobial activities compared with UV or MO nanoparticles alone. In this study, nanoparticles of ZnO, ZnTiO3, MgO, and CuO were selected as model nanoparticles. A dual UV collimated beam device of UV-A and UV-C was developed depending upon the lamp divided by coating...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29138406/activating-cobalt-ii-oxide-nanorods-for-efficient-electrocatalysis-by-strain-engineering
#18
Tao Ling, Dong-Yang Yan, Hui Wang, Yan Jiao, Zhenpeng Hu, Yao Zheng, Lirong Zheng, Jing Mao, Hui Liu, Xi-Wen Du, Mietek Jaroniec, Shi-Zhang Qiao
Designing high-performance and cost-effective electrocatalysts toward oxygen evolution and hydrogen evolution reactions in water-alkali electrolyzers is pivotal for large-scale and sustainable hydrogen production. Earth-abundant transition metal oxide-based catalysts are particularly active for oxygen evolution reaction; however, they are generally considered inactive toward hydrogen evolution reaction. Here, we show that strain engineering of the outermost surface of cobalt(II) oxide nanorods can turn them into efficient electrocatalysts for the hydrogen evolution reaction...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29137995/new-starch-ester-gelatin-based-films-developed-and-physicochemical-characterization
#19
Chengmei Shi, Furong Tao, Yuezhi Cui
A new starch-based ester Starch-EDTAD-NHS (SEN) was successful prepared firstly and used to modify gelatin films by amidation. (1)H NMR, FTIR spectra, XRD curves, elemental analysis and Van Slyke method verified the synthesis and confirmed the crosslinking procedure. The properties of the composite SEN-Gel film, such as mechanical test, surface hydrophobicity, light barrier performance, water uptake studies, morphology and solubility behavior were studied. The results of water contact angle showed the hydrophobicity of the films, and the obtained transparency values indicated that the films were opaque...
November 11, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29137931/secondary-effluent-purification-by-a-large-scale-multi-stage-surface-flow-constructed-wetland-a-case-study-in-northern-china
#20
Haiming Wu, Jian Zhang, Wenshan Guo, Shuang Liang, Jinlin Fan
Assessment of treatment performance in the large-scale constructed wetland (CW) for secondary effluent purification remains limited. The aim of this case study was to therefore to investigate the long-term treatment capacity of organics and ammonium pollutants in a large-scale multi-stage surface-flow (SF) CW fed with secondary effluents from the wastewater treatment plants (WWTPs) in northern China. The results for two-and-half-year study period indicated that the water quality parameters including chemical oxygen demand (COD) and ammonium (NH4(+)-N) met the Chinese Grade III of Environmental Quality Standards...
November 2, 2017: Bioresource Technology
keyword
keyword
67001
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"