Search

Multilingual abstracts in the five official working languages of the United Nations. (PDF 261 kb)

This paper describes the development and validation of an automated method for the dissolution testing of metformin hydrochloride for use in the quality assurance program. Automation could provide significant improvements in the consistency of results compared with existing manual methods. Care and consideration were given to the automation of preparation of samples and standards in line with current manual procedures. Reproducibility and sample preparation accuracy were quantified, and results obtained were compared against tests performed manually. The system was validated in accordance with the Chinese (1), European (2), and United States pharmacopeias (3) using salicylic acid. Salicylic acid testing for bath calibration also required dilution, which provided a direct comparison to the automated system used to test metformin hydrochloride tablets.

With the popularity of the Internet, more and more people choose online shopping, however, in the case of lacking security measures, there is a great deal of risk on the Internet. to this situation,In response to this situation, this paper presents a digital certificate based on the X.509 standard. This paper uses the C language generation public key algorithm (RSA). Realization of the digital certificate registration, verification and certificate generation process,the identity of certification users can be verified and provide proof of identity on the Internet transactions, reducing the transaction risks greatly, ensuring the user's property and interests are not infringed. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3824

We establish several new Lyapunov-type inequalities for some quasilinear dynamic system involving the $(p_1,p_2,\ldots,p_m)$ -Laplacian on an arbitrary time scale $\mathbb{T}$ , which generalize and improve some related existing results including the continuous and discrete cases.

We establish several new Lyapunov-type inequalities for some quasilinear dynamic system involving the (p1,p2,…,pm)-Laplacian on an arbitrary time scale 𝕋, which generalize and improve some related existing results including the continuous and discrete cases.