Two simple, rapid, and sensitive spectrophotometric methods are proposed for the determination of levodopa (LD). The first method is based on coupling of 4-aminoantipyrine (4-AAP) with one of the dopamine derivatives (LD, CD) to give a new ligand that reacts with copper tetramine complex to give intensely colored chelates. The colored products are quantified spectrophotometrically at 525 and 52...

BACKGROUND AND AIM A metric that predicts the presence of cancer-related liver disease would allow early implementation of treatment. We compared the demographic and clinical characteristics of patients with no evidence of liver disease, with a cancer-associated liver disease, and with a liver disease not associated with cancer. METHODS Retrospective, hospital-based, cross-sectional study whi...

Systems of the form x′(t) = g(r(t), xt) 0 = ∆(r(t), xt) generalize differential equations with delays r(t) < 0 which are given implicitly by the history xt of the state. We show that the associated initial value problem generates a semiflow with differentiable solution operators on a Banach manifold. The theory covers reaction delays, signal transmission delays, threshold delays, and delays dep...

The paper deals with a class of discrete-time stochastic control processes under a discounted optimality criterion with random discount rate, and possibly unbounded costs. The state process {xt} and the discount process {αt} evolve according to the coupled difference equations xt+1 = F (xt, αt, at, ξt), αt+1 = G(αt, ηt) where the state and discount disturbance processes {ξt} and {ηt} are sequen...

In the literature an abundance of genomic relationship matrices have been described which mainly differ in the age of the relationships that they trace. Marker based relationship matrices (G) generally trace very old relationships, since the marker mutations occurred. Pedigree (A) and linkage analysis relationship matrices (GLA) trace relationships since pedigree recording started, i.e. since t...

Selecting superior genotypes across different environments is vital for varietal release, crop planting, and commercial use. Therefore, the objectives of this research were to appraise performance hybrids approved in recent years diverse environments, recommend high-yielding stable wider adaptation. Fourteen single cross maize hybrid (G), including a check, implemented ten (E) two seasons (2020...

Let Xk be a proper irreducible separated scheme of finite type over a field k. We will also assume that Xk satisfies Serre’s S2 condition (for the sake of simplicity the reader may think that Xk is smooth or a locally complete intersection). For a noetherian scheme T over k denote XT = (Xk)×Spec(k) T and let Φ(T ) be the collection of all closed subsets Z ⊂ XT such that every point z ∈ Z has co...

Let Xk be a proper irreducible separated scheme of finite type over a field k. We will also assume that Xk satisfies Serre’s S2 condition (for the sake of simplicity the reader may think that Xk is smooth or a locally complete intersection). For a noetherian scheme T over k denote XT = (Xk) ×Spec(k) T and let Φ(T ) be the collection of all closed subsets Z ⊂ XT such that every point z ∈ Z has c...