A flow-through aqueous standard generation system for thin film microextraction investigations of UV filters and biocides partitioning to different environmental compartments

2017 ◽  
Vol 230 ◽  
pp. 663-673 ◽  
Author(s):  
Fardin Ahmadi ◽  
Chris Sparham ◽  
Janusz Pawliszyn
Keyword(s):  
Thin Film ◽  
Uv Filters ◽  
Generation System ◽  
Flow Through ◽  
Aqueous Standard ◽  
Environmental Compartments

Fate and distribution of benzotriazole UV filters and stabilizers in environmental compartments from Gran Canaria Island (Spain): A comparison study

2021 ◽  
Vol 756 ◽  
pp. 144086
Author(s):  
Sarah Montesdeoca-Esponda ◽  
María Esther Torres-Padrón ◽  
Zoraida Sosa-Ferrera ◽  
José Juan Santana-Rodríguez
Keyword(s):  
Uv Filters ◽  
Comparison Study ◽  
Gran Canaria ◽  
Environmental Compartments

scholarly journals Entropy Generation in MHD Mixed Convection Non-Newtonian Second-Grade Nanoliquid Thin Film Flow through a Porous Medium with Chemical Reaction and Stratification

Entropy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 139 ◽  
Author(s):  
Noor Khan ◽  
Zahir Shah ◽  
Saeed Islam ◽  
Ilyas Khan ◽  
Tawfeeq Alkanhal ◽  
...  
Keyword(s):  
Thin Film ◽  
Mass Transfer ◽  
Porous Medium ◽  
Mixed Convection ◽  
Chemical Reaction ◽  
Entropy Generation ◽  
Film Flow ◽  
Second Grade ◽  
Thin Film Flow ◽  
Flow Through

Chemical reaction in mixed convection magnetohydrodynamic second grade nanoliquid thin film flow through a porous medium containing nanoparticles and gyrotactic microorganisms is considered with entropy generation. The stratification phenomena, heat and mass transfer simultaneously take place within system. Microorganisms are utilized to stabilize the suspended nanoparticles through bioconvection. For the chemical reaction of species, the mass transfer increases. The governing equations of the problem are transformed to nonlinear differential equations through similarity variables, which are solved through a well known scheme called homotopy analysis method. The solution is expressed through graphs and illustrations which show the influences of all the parameters. The residual error graphs elucidate the authentication of the present work.

Flow characteristics and a permeability model in nanoporous media with solid-liquid interfacial effects

2017 ◽  
Vol 5 (1) ◽  
pp. SB1-SB8 ◽  
Author(s):  
Jiulong Wang ◽  
Hongqing Song ◽  
Weiyao Zhu ◽  
Yuhe Wang ◽  
John Killough
Keyword(s):  
Thin Film ◽  
Solid Wall ◽  
Flow Characteristics ◽  
Average Pore ◽  
Flow Rates ◽  
Interfacial Effects ◽  
Nanoporous Media ◽  
Flow Through ◽  
Repulsive Forces ◽  
Solid Liquid

Molecular dynamics simulations of water flow through nanotubes have demonstrated higher flow rates than the flow rates predicted using classical models and a significant change in flow patterns due to the thin film that forms on the solid wall of the tubes. We have developed a two-region analytical model that described the flow characteristics and permeability of fluid flow through nanoporous media and considered the solid-liquid interfacial effects. Our model considers the influence of various interfacial effects, including long-range van der Waals forces, double-layer repulsive forces, and short-range structure repulsive forces, and it establishes relationships between the permeability and the average pore diameter, porosity, surface diffusion, and contact angle by numerical calculations. Our results indicate that the permeability calculated using the present model (with interfacial effects) is more than 30 times the results that were calculated using the Kozeny-Carman equation (without interfacial effects). The thickness of the thin film significantly affects the flow characteristics. We have gained new insight and guidance regarding the development of nanoscale pore reservoirs, such as shale gas and shale oil.

Stress Assisted Controlled Fabrication of Nano Channels and Their Flow Characteristics

2004 ◽  
Author(s):  
Sathyanarayanan Mani ◽  
Taher M. Saif
Keyword(s):  
Thin Film ◽  
Experimental Data ◽  
Silicon Dioxide ◽  
Silicon Substrate ◽  
Flow Characteristics ◽  
Square Root ◽  
Proportionality Constant ◽  
Flow Through ◽  
Oxide Stress ◽  
Stress Raisers

A method to fabricate nano channels narrower than 50nm without the need for any nano lithography is presented. The nano channels are formed by cracking a thin film of silicon dioxide on a silicon substrate by residual stress alone. However, for controlled initiation of cracks on oxide, stress raisers are planted on a silicon substrate by deep RIE. These channels are used to study capillary driven fluid flow through nanochannels. Experimental analysis suggests that the flow rate is inversely proportional to the square root of time, which is in agreement with the theoretical model. From the theoretical plot that fits the experimental data the value of the proportionality constant is determined. From this value it is possible to back calculate the meniscus contact angle if we know the surface energy of the fluid or vice versa.

Automated thin-film microextraction coupled to a flow-through cell: somewhere in between passive and active sampling

2016 ◽  
Vol 409 (8) ◽  
pp. 1975-1984 ◽  
Author(s):  
Manuel Wohde ◽  
Jens-Ole Bartz ◽  
Leonard Böhm ◽  
Christoph Hartwig ◽  
Benjamin Martin Keil ◽  
...  
Keyword(s):  
Thin Film ◽  
Active Sampling ◽  
Flow Through

Copper(II)-ion response of CuAsSe thin-film sensors in a flow-through microcell

1995 ◽  
Vol 27 (1-3) ◽  
pp. 384-387 ◽  
Author(s):  
E. Bychkov ◽  
M. Bruns ◽  
H. Klewe-Nebenius ◽  
G. Pfennig ◽  
K. Raptis ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Film Sensors ◽  
Flow Through

scholarly journals On the need to control the state of the upper edge of the prism in a flow-through refractometer for measurements with an error less than 10−4

2021 ◽  
Vol 2086 (1) ◽  
pp. 012145
Author(s):  
F A Isakov ◽  
V V Davydov ◽  
V Yu Rud
Keyword(s):  
Thin Film ◽  
Refractive Index ◽  
Measurement Error ◽  
Technological Process ◽  
Experimental Studies ◽  
The State ◽  
Flowing Liquid ◽  
Upper Face ◽  
Flow Through ◽  
Negative Factors

Abstract The article substantiates the need to use a flow-through refractometer to control the state of a flowing liquid during scientific research, when automating a technological process, etc. The main negative factors that affect an increase in the measurement error of the refractive index n of a flowing liquid are determined. It was found that one of these factors is the formation of a thin film (plaque) on the upper face of the prism, which is in contact with the medium under study. The study of the influence of this film on the measurement error has been carried out. A method has been developed to eliminate plaque from the upper face of the prism during the operation of the refractometer. The results of experimental studies are presented.

Shape Maintaining of Ultra-lightweight Thin-Film Power Generation System

2016 ◽  
Vol 14 (ists30) ◽  
pp. Pq_7-Pq_12
Author(s):  
Naoki TAKAURA ◽  
Koji TANAKA ◽  
Shohei KOYAMA ◽  
Yoji SIRASAWA ◽  
Rikio YOKOTA ◽  
...  
Keyword(s):  
Thin Film ◽  
Power Generation ◽  
Generation System ◽  
Power Generation System
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