نتایج جستجو برای: pvc pipe

تعداد نتایج: 20569  

2012
Amanda K. Martin Amy J. Pruden Joseph O. Falkinham

Assimilable organic carbon (AOC) is a suspected contributor to growth of microbes, including pathogens, in plumbing systems. Two phases of research were completed to improve knowledge of AOC and other forms of organic carbon in premise plumbing. In the first phase, the AOC Standard Method 9217B was compared to a new luminescence-based AOC in terms of time, cost, convenience, and sources of erro...

Journal: :Carbohydrate polymers 2013
Sandra Bigot Guy Louarn Nasreddine Kébir Fabrice Burel

Seaweed antibacterial polysaccharides were grafted onto poly(vinylchloride) (PVC) surfaces using an original click chemistry pathway. PVC isothiocyanate surfaces (PVC-NCS) were first prepared by nucleophilic substitution of the chloride groups by isothiocyanate groups in DMSO/water medium. Then, unmodified Ulvan, Fucan, Laminarin or Zosterin was directly grafted onto the PVC-NCS surface using 1...

Journal: :British journal of industrial medicine 1989
H S Lee J Yap Y T Wang C S Lee K T Tan S C Poh

Polyvinylchloride (PVC) resins are widely used in industry. Asthma due to the thermal degradation products of PVC are well documented. In this first case of occupational asthma due to unheated PVC resin dust the patient was exposed to PVC resin dust during the mixing of chemicals used for making plastic seals for bottle caps.

Journal: :BMC Public Health 2008
Valerio Gennaro Marcello Ceppi Paolo Crosignani Fabio Montanaro

BACKGROUND The production of vinyl chloride (VC) and polyvinyl chloride (PVC) involves the use of various chemicals, some known to be toxic and potentially or definitely carcinogenic. The related potential risk often has not been properly investigated. Updated cancer mortality among different subgroups of workers employed in a VC-PVC production plant located in Porto Marghera (Italy) was re-ana...

2007
S. NOURANIAN H. GARMABI N. MOHAMMADI

In this investigation, the effects of formulation and processing factors on the adhesion between polyurethane (PU) and plasticized poly(vinyl chloride) (pPVC) layers was studied using the Taguchi method for experimental design. Among the many factors, nine parameters were screened and tested at two or three levels, taking advantage of the Taguchi L27 orthogonal array. The factors studied were P...

Journal: :Journal of Sound and Vibration 2023

This article explores the potential of vibro-acoustics to detect physical ageing plastic pipes. For this purpose, two different topics are combined: ability estimate storage modulus a pipe, and sensitivity estimated changes due ageing. Concerning first topic, vibro-acoustic method was applied water-filled HDPE pipes, one surrounded by air another sand. The excitation achieved via an impact hamm...

2015
James Alderman Christian Janson Carlos Cid Jason Crampton

Publicly Verifiable Outsourced Computation (PVC) allows weak devices to delegate computations to more powerful servers, and to verify the correctness of results. Delegation and verification rely only on public parameters, and thus PVC lends itself to large multi-user systems where entities need not be registered. In such settings, individual user requirements may be diverse and cannot be realis...

2011
Jun Kim Jeong Su Kim Yong Hyun Park June Hong Kim Kook Jin Chun

Catheter ablation is performed in selected patients with a symptomatic premature ventricular complex (PVC) or PVC-induced cardiomyopathy. Ablation of PVC from the His region has a high risk of inducing a complete atrioventricular block. Here we report successful catheter ablation of a parahisian PVC in a 63-year-old man.

2015
Kaimeng Xu Taian Chen Zhifeng Zheng Suyong Huang Kaifu Li Tuhua Zhong

The thermal degradation behavior and pyrolysis kinetic models of wood flour (WF)/PVC composites before and after adding chitosan were studied using thermogravimetry (TGA) and nine common kinetic model functions (f(α)). The results indicated that the thermal degradation temperature of WF/PVC composites was delayed to a higher value after adding chitosan. The first-order reaction order (L1) model...

Journal: :Heliyon 2023

The present study aims to investigate the entrainment of electrolytic bath with aluminum tapping flows from reduction cell. physical water modeling technique was used together numerical simulations.The model experiments were carried out in a one-tenth-scale an cell and system. comprises transparent acrylic rectangular container, measuring 800 mm wide, 200 mm, long 300 deep 26 mm-diameter PVC pi...

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