Gerotor pump is a special kind of internal rotary pump, which contains a trochoid profile (commonly called as cycloid). Generation of trochoid is normally realized by external rolling method, namely a circle rotating on a fixed circle without slipping. This paper proposes derivative process of the trochoid profile by means of internal rolling method, which is that internal surface of a circle c...

In this paper, different first and second derivative filters are investigated to find edge map after denoising a corrupted gray scale image. We have proposed a new derivative filter of first order and described a novel approach of edge finding with an aim to find better edge map in a restored gray scale image. Subjective method has been used by visually comparing the performance of the proposed...

in this paper, we solve a inhomogeneous fractional klein-gordon equation by the method of separating variables. we apply the method for three boundary conditions, contain dirichlet, neumann, and robin boundary conditions, and solve some examples to illustrate the effectiveness of the method.

ABSTRACT. Two simple precise and accurate spectrophotometric techniques are developed for simultaneous determination of ternary mixture urea, creatinine, uric acid in humane urine sample. The first technique is a ratio derivative zero - crossing where measured urea at 216.61 nm, creatinine 260.56 283 nm. second successive spectra 203 261 287 respectively. These procedures do not need separation...

Losartan, a highly effective blood pressure lowering agent, has been widely used for the treatment of hypertension. A fast and reliable method for the determination of losartan was highly desirable to support formulation screening and quality control. A first derivative UV spectroscopic method was developed for determination of losartan in the tablet dosage form. The first derivative spectrum r...

Objectives: This study aimed to develop simple UV spectrophotometric methods for simultaneous determination of pravastatin sodium and pioglitazone hydrochloride without previous separation. Methods. The first method is the first derivative, where the peak amplitudes of first derivative of absorption spectra were measured at 249.7 and 277 nm for pravastatin sodium and pioglitazone hydrochloride ...

Two spectrophotometric methods are described and applied to resolve ternary mixtures of the corticosteroid hydrocortisone (HYD) and the antibiotics nystatin (NYS) and oxytetracycline (OXY). The simultaneous determination of these three compounds was firstly accomplished by a derivative method using the “ratio spectrum-zero crossing derivative” and then by multivariate methods partial least squa...

Non-derivative and derivative UV spectrophotometric techniques using water as solvent have been developed for the simultaneous determination of amoxicillin and clavulanate in combined tablets. For UV spectrophotometric techniques, the concentrations of amoxicillin and clavulanate in conformity with the Lambert-Beer law are 100.0 – 160.0 mg/ml and 10.0 – 35.0 mg/ml, respectively. The derivative ...