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Potentiometric determination of captopril in pharmaceutical formulations
(Editora Unesp, 2003-01-01)
A simple, precise, rapid and low-cost potentiometric method for captopril determination in pure form and in pharmaceutical preparations is proposed. Captopril present in tablets containing known quantity of drug was ...
Simultaneous determination of thorium and uranium in mineral fertilizers by inductively coupled plasma optical emission spectrometry
(2016-04-01)
The simultaneous determination of thorium and uranium in mineral fertilizers by inductively coupled plasma optical emission spectrometry (ICP OES) was optimized. The three-level factorial design was applied to optimize the ...
Application of the GPS system for preliminary satellite orbit determination
(1997-12-01)
In this paper, we discuss a method of preliminary orbit determination for an artificial satellite based on the navigation message of the GPS constellation. Orbital elements are considered as state variables and a simple ...
Nanostructured interfaces containing MWCNT and nitro aromatics: a new tool to determine Nimesulide
(Elsevier, 2020)
A novel type of multiwalled carbon nanotube-modified glassy carbon electrode with an entrapped nimesulide drug was constructed. The new electrode surface was characterized by scanning electrochemical microscopy and scanning ...
Derivative spectrophotometric determination of nitrate in plant tissue
(AOAC INTERNATIONAL, 2003-11)
A derivative spectrophotometric method was developed to determine NO3--N in plant tissues. The method is based on measurement of the first-derivative spectrum of nitrosalicylic acid in basic solution. The nitrosalicylic ...
Gravimetric determination of nickel as the ternary Nickel - pyridine - picrate complex
(1982)
A study of ternary complex formation between nickel, pyridine and picrate ion has been made. The metal - pyridine complex reacts with picrate to give an insoluble, stable, green precipitate. Conditions of formation, ...
Determination of convex functions via subgradients of minimal norm
(Springer, 2020)
We show, in Hilbert space setting, that any two convex proper lower semicontinuous functions bounded from below, for which the norm of their minimal subgradients coincide, they coincide up to a constant. Moreover, under ...
Socio-demographic determinants associated with blastocystis infection in arequipa, Peru
(American Society of Tropical Medicine and Hygiene, 2020)
Blastocystis is one of the most common protozoa in the human gut and a zoonotic organism related to unsanitary living conditions. This protozoon shows a broad distribution, unclear symptomatology, and undefined pathogenicity. ...
Sex determination studies in two species of teleost fish, Oreochromis niloticus and Leporinus elongatus
(Acad Sinica Inst Zoology, 2014)
Online preconcentration system for determining ultratrace amounts of Cd in vegetal samples using thermospray flame furnace atomic absorption spectrometry
(2007)
A system has been developed for online preconcentration and determination of Cd using thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS). It is based on the solid-phase extraction of Cd in an Amberlite ...