A new procedure for the direct determination of picomolar levels of iron in seawater is presented. Cathodic stripping voltammetry (CSV) is preceded by adsorptive accumulation of the iron(III)-2,3-dihydroxynaphthalene (DHN) complex from seawater, containing 20 microM DHN at pH 8.0, onto a static mercury drop electrode, followed by reduction of the adsorbed species. The reduction current is catal...

Oxygen supply and dissolved carbon dioxide (dCO(2)) stripping are two of the most important control parameters in cell culture. In this study, we investigated the effect of scale-up on the volumetric gas transfer coefficient with bioreactors of different sizes (working volume: 80 L, 500 L, 2000 L, and 10,000 L; aspect ratio: 1.0-1.6). Sparging air into water increased the volumetric oxygen tran...

Cathodic adsorptive stripping voltammetry (CASV) was applied for the determination of rutin in pharmaceuticals, human urine, and blood serum. An electrochemical stripping procedure for trace measurements of rutin was developed based on the adsorption of the Cu2þ-rutin complex on a hanging mercury drop electrode and applied to the quantification of the drug. Cyclic voltammetry was used to charac...

BACKGROUND The aim of this study is to evaluate the change in pulp chamber temperature during the stripping technique. METHODS Seventy-eight proximal surfaces of 39 extracted human teeth were stripped by two techniques: double-sided perforated stripping disk (PSD) and handheld stripper (HS). The teeth were divided into three groups: incisors (group 1), premolars (2), and molars (3). A J type ...

A sensitive and reliable stripping voltammetric method was developed to determine timolol drug. This method is based on the adsorptive accumulation of the drug at a hanging mercury drop electrode (HMDE) and then a negative sweep was initiated, which yield a well defined cathodic peak at –850 mV versus (Ag/AgCl) silver reference electrode. To achieve high sensitivity, various experimental and in...

Aim: To comparative analysis of vein stripping versus no in varicose disease. Study design: Comparative study Place and duration study: Department Surgery, CMH Kharian Medical College, from 01-01-2019 to 31-12-2021. Methodology: Eighty cases which were having sapheno-femoral valve incompetence as well perforators-incompetence enrolled. The age the was between 16 70 year. Electrocardiography (EC...

The residual agricultural plastic film in China is not easily recovered due to the thinness and poor mechanical properties of domestic films, a large amount remaining farmland soil poses great threat quality crop production. A spring-tooth collector (SRPFC) widely used (RPF) recycling operations. However, there are two major problems current SRPFC: low recovery rate (RRRF) caused by difficulty ...