This study investigated the changes in ingredients Fallopia multiflora Thunb. Haraldson (FMT) root after processing it with different methods such as soaking, stewing, and steaming or combined methods. The total polyphenol, 2,3,5,4′-tetrahydroxystilben-2-O-β-D-glucoside (THSG), physcion contents FMT products were determined using high-performance liquid chromatography (HPLC) ultraviolet-visible...

N-methyl fatty hydroxamic acids (N-MFHAs) is a derivative of acid (FHA), were synthesized from ketapang seed oil (Terminalia catappa L.) with hydroxylamine enzymatically using immobilized lipase (Lipozyme TL IM). N-MFHAs that are still in mixed state triglycerides the oil. This research aims to determine optimum conditions for separation into their single components and percentage composition H...

Strawberry is rich in anthocyanins, which are responsible for the red color, and contains several colorless phenolic compounds. Among the colorless phenolic compounds, some, such as hydroxycinammic acid derivatives, emit blue-green fluorescence when excited with ultraviolet (UV) light. Here, we investigated the effectiveness of image analyses for estimating the levels of anthocyanins and UV-exc...

Simple and sensitive methods using high-performance liquid chromatography-diode array detection (HPLC-DAD) and ultraviolet (UV)-spectrophotometry were developed and compared to quantify lychnopholide (LYC) in poly-ε-caprolactone nanocapsules and to study its release kinetics. Both methods were validated concerning their specificity, linearity, limits of detection and quantification, precision, ...

BACKGROUND We have previously reported several lignin-like activities of the alkaline extract of the leaves of Sasa senanensis Rehder (SE), such as anti-HIV and radical scavenging activity. As an extension, possible SE protection of cells from ultraviolet (UV)-induced injury (referred to "anti-UV activity") was investigated. MATERIALS AND METHODS HSC-2, human oral squamous cell carcinoma cell...

there are various methods for the analysis of potassium sorbate and sodium benzoate in food products, but a rapid and reliable method for identification of these preservatives in doogh (an iranian traditional dairy drink) is a procedure, in which high performance liquid chromatography (hplc) utilized and followed by uv diode array detection of the two preservatives. the aim of this case study w...

A high-performance liquid chromatographic (HPLC) and a ultraviolet (UV) methods were developed and validated for the quantitative determination of Dexibuprofen (DI) in pharmaceutical dosage form. HPLC was carried out by reversed phase technique on a RP-18 column with a mobile phase composed of acetonitrile and 0.5% triethylamine (pH 7.5 adjusted with orthophosphoric acid (30 : 70, v/v)). UV met...

Introduction . Coronavirus disease (COVID-19) is an acute infectious caused by SARS-CoV-2 (severe respiratory syndrome-related coronavirus 2). Favipiravir a synthetic prodrug with antiviral activity used for the treatment of COVID-19. There are oral and parenteral dosage forms favipiravir. Compared administration, administration has some advantages. Developing method determination favipiravir i...

background: cobalamin deficiency and peripheral neuropathy (pn) are commonly seen in hiv-infected adults. the level of urine methylmalonic acid (umma), a reliable indicator of tissue cobalamin status, was determined in hiv infected subjects with and without pn to establish this association. methods: one hundred and ninety-eight (198) consenting hiv infected subjects with and without pn were rec...

Objective: During reversed-phase high-performance liquid chromatography (HPLC) analyses, optimization of separation can be achieved by selecting appropriate chromatographic conditions. The retention time, peak shape, and size peaks are dependent on amount organic modifier in the mobile phase buffer pH. aim this study was to investigate effects varying pH, acetonitrile composition flow rate phas...