a sensitive high performance liquid chromathography (hplc) analytical procedure was developed for the quantitive determination of trimethoprim (tm* and sulphamethoxazole (sm) in commercial dosage forms. c18 analytical column (stainless steel, 25 cm * 4.6 mm i.d.) was packed with 5-*m particles of the reversed phase material and used for assays. mobile phase containing 0.025 m sodium phosphate a...

background: a number of former studies have shown that tuberculosis (tb) is higher in diabetes mellitus (dm) patients than non-diabetics. both dm and tb are major public health problems in iran, and because of the lack of investigation in this field in the region, we conducted this study to evaluate the prevalence of dm in admitted pulmonary tuberculosis patients. methods: the medical files of ...

adsorption of co molecule on the vanadium surface has been studied by using of the dft method with lanl2dz,6-31g* and 6-31g** basis sets by gga approximation of theory. using periodic first principles simulations we investigate the interaction of oxygen molecule with regular v (100) surface. the limitation of this approach is the use of thin metallic slabs with a limited range for their coverag...

We develop a general framework of rule based database update on the basis of prioritized logic programs. This approach has advantages in representing and handling information connict in updates. We then focus on the computational aspect of this approach. We show that under our framework, the model checking in an update is co-NP-complete, while the associated inference problem is P 2-complete. F...

Checking copositivity of a matrix is a co-NP-complete problem. This paper studies copositive matrices with certain spectral properties. It shows that an indefinite matrix with exactly one positive eigenvalue is copositive if and only if the matrix is nonnegative. Moreover, it shows that finding out if a matrix with exactly one negative eigenvalue is strictly copositive or not can be formulated ...