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Готові списки джерел за темами / Local water aging

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Добірка наукової літератури з теми "Local water aging"

Автор: Grafiati

Опубліковано: 5 березня 2024

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Статті в журналах з теми "Local water aging"

1

Fischer, Joerg, Reinhold Lang, Patrick Bradler, Paul Freudenthaler, Wolfgang Buchberger, and Susan Mantell. "Global and Local Aging in Differently Stabilized Polypropylenes Exposed to Hot Chlorinated Water with and without Superimposed Mechanical-Environmental Loads." Polymers 11, no. 7 (2019): 1165. http://dx.doi.org/10.3390/polym11071165.

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The influence of chlorinated water on the global and local aging behavior of polypropylene (PP) was investigated for three differently stabilized PP grades consisting of the same PP base polymer. While one of the PP grades contained only a processing stabilizer (PP-S0), the other two were modified with a primary phenolic antioxidant (PP-S1) and a combination of a primary phenolic antioxidant and a hindered amine stabilizer (PP-S3). To study global aging effects, micro-sized specimens were pre-exposed to chlorinated water (5 mg/L free chlorine) at 60 °C for up to 750 h. Over the entire exposure

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2

Lee, Chi-Yuan, Chia-Hung Chen, Guo-Bin Jung, Shih-Chun Li, and Yi-Zhen Zeng. "Internal Microscopic Diagnosis of Accelerated Aging of Proton Exchange Membrane Water Electrolysis Cell Stack." Micromachines 11, no. 12 (2020): 1078. http://dx.doi.org/10.3390/mi11121078.

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The hydrogen production reaction of the proton exchange membrane (PEM) water electrolysis cell stack is the reverse reaction of the fuel cell, but the water electrolysis operation requires high pressure, and the high pressure decomposes hydrogen molecules, thus aging or causing failure in the water electrolysis cell stack. In addition, there are five important physical parameters (current, voltage, flow, pressure and temperature) inside the water electrolysis cell stack, which can change the performance and shorten the life of the cell stack. However, the present techniques obtain data only by

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3

Lee, Chi-Yuan, Chia-Hung Chen, Hsian-Chun Chuang, Hsiao-Te Hsieh, and Yen-Chen Chiu. "Long-Acting Real-Time Microscopic Monitoring Inside the Proton Exchange Membrane Water Electrolyzer." Sensors 23, no. 12 (2023): 5595. http://dx.doi.org/10.3390/s23125595.

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The proton exchange membrane water electrolyzer (PEMWE) requires a high operating voltage for hydrogen production to accelerate the decomposition of hydrogen molecules so that the PEMWE ages or fails. According to the prior findings of this R&D team, temperature and voltage can influence the performance or aging of PEMWE. As the PEMWE ages inside, the nonuniform flow distribution results in large temperature differences, current density drops, and runner plate corrosion. The mechanical stress and thermal stress resulting from pressure distribution nonuniformity will induce the local aging

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4

Guan, X. H., C. Shang, S. M. Yu, and G. H. Chen. "Exploratory study on reusing water treatment works sludge to enhance primary sewage treatment." Water Supply 4, no. 1 (2004): 159–64. http://dx.doi.org/10.2166/ws.2004.0019.

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This paper focused on an exploratory study on reusing waste sludge of a local water treatment works (referred to as “alum sludge”) to enhance the removal of both SS (suspended solids) and COD (chemical oxygen demand) from sewage. Laboratory jar tests were conducted using the raw sewage and the alum sludge taken from a local sewage treatment works with variations in sludge dosages, aging times and pH conditions. It has been found that adding alum sludge at dosage around 20 mg/l as Al to the sewage can increase the SS removal by more than 20% and the COD removal by at least 15%, compared with th

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5

Andrew, J. Jefferson, Vellayaraj Arumugam, and Hom N. Dhakal. "Effect of Intra-Ply Hybrid Patches and Hydrothermal Aging on Local Bending Response of Repaired GFRP Composite Laminates." Molecules 25, no. 10 (2020): 2325. http://dx.doi.org/10.3390/molecules25102325.

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This study investigates the influence of intra-ply hybrid patches and hydrothermal aging on the indentation properties of patch repaired GFRP composites. Fabrics with various proportions of glass and Kevlar fibers were employed as the patches to achieve enhanced mechanical properties by hybridizing Kevlar and glass fibers together. Hydrothermal aging behavior of repaired composite laminates modified with water-resistant glass fibers in the outer layers was further investigated. Specimens were immersed in an environmental chamber containing seawater at temperatures of 30 (ambient), 50, and 70 °

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6

Qin, Feng, Wenchao Zhang, Mingzi Zhang, et al. "Adipose-Derived Stem Cells Improve the Aging Skin of Nude Mice by Promoting Angiogenesis and Reducing Local Tissue Water." Aesthetic Surgery Journal 41, no. 7 (2021): NP905—NP913. http://dx.doi.org/10.1093/asj/sjab001.

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Abstract Background Adipose-derived stem cells (ASCs) are considered promising cells for skin rejuvenation. However, whether the angiogenetic effect of ASCs plays an important role in the treatment of aging skin and its influence on skin tissue remain elusive. Objectives The aim of this study was to evaluate the effect of ASCs on angiogenesis and local tissue water (LTW) in the aging skin of nude mice. Methods Twelve nude mice were randomly divided into a UVB-induced photoaging group and a natural aging group. After the mouse model had been established, ASCs and phosphate-buffered saline (PBS)

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7

Zhai, Yan Wei, Chang Wu Liu, and Xina Xian Zhai. "Research on Main Problems and their Countermeasures on Chinese Small Hydropower Development." Applied Mechanics and Materials 295-298 (February 2013): 1889–93. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.1889.

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The constructions of small hydropower stations play an important role in improving local energy structure, development of corporations, agricultural and environmental melioration, and improving living standard of local people. Thus, studying status at small hydropower stations of China and existed problems in their development has a practical significance. With investigation data, the paper comprehensively analyzed running status of the stations, equipment aging in their development, lower utilized water resources, backward management, and disordered exploitation, etc. Therefore, the authors p

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8

Kim, Taehyeon, Jihoon Shin, Jinseok Hyung, Kibum Kim, Jayong Koo, and YoonKyung Cha. "Willingness to Pay for Improved Water Supply Services Based on Asset Management: A Contingent Valuation Study in South Korea." Water 13, no. 15 (2021): 2040. http://dx.doi.org/10.3390/w13152040.

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The pressure on water infrastructure has increased due to an increase in the number of aging water pipes. Aging pipes are prone to failure, causing significant financial losses and service disruptions. The increasing number of aged pipes and limited budget for pipe rehabilitation or replacement necessitates water infrastructure asset management to ensure sustainable water supply services. In this study, contingent valuation was used to estimate the willingness to pay (WTP) and value improved water supply services through the implementation of asset management. To estimate the WTP at the indivi

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9

Bao, Keyu, Rushikesh Padsala, Daniela Thrän, and Bastian Schröter. "Urban Water Demand Simulation in Residential and Non-Residential Buildings Based on a CityGML Data Model." ISPRS International Journal of Geo-Information 9, no. 11 (2020): 642. http://dx.doi.org/10.3390/ijgi9110642.

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Humans’ activities in urban areas put a strain on local water resources. This paper introduces a method to accurately simulate the stress urban water demand in Germany puts on local resources on a single-building level, and scalable to regional levels without loss of detail. The method integrates building geometry, building physics, census, socio-economy and meteorological information to provide a general approach to assessing water demands that also overcome obstacles on data aggregation and processing imposed by data privacy guidelines. Three German counties were used as validation cases to

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10

Kuipers, Nathan T., Charity L. Sauder, Matthew L. Kearney, and Chester A. Ray. "Interactive effect of aging and local muscle heating on renal vasoconstriction during isometric handgrip." American Journal of Physiology-Renal Physiology 297, no. 2 (2009): F327—F332. http://dx.doi.org/10.1152/ajprenal.00165.2009.

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The purpose of the study was to determine the interactive effect of aging and forearm muscle heating on renal vascular conductance and muscle sympathetic nerve activity (MSNA) during ischemic isometric handgrip. A tube-lined, water-perfused sleeve was used to heat the forearm in 12 young (27 ± 1 yr) and 9 older (63 ± 1 yr) subjects. Ischemic isometric handgrip was performed before and after heating. Muscle temperature (intramuscular thermistor) was 34.3 ± 0.2 and 38.7 ± 0.1°C during normothermia and heating, respectively. At rest, heating had no effect on renal blood velocity (Doppler ultrasou

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