In modern power systems, transformers are considered vital components that can ensure the grid’s continuous operation. this regard, studying breakdown in transformer becomes necessary, especially its insulating system. Hence, study, Box–Behnken design (BBD) was used to introduce a prediction model of voltage (VBD) for oil presence different barrier effects point/plane gap arrangement with alter...

A fucoidan discovered in the plant Fucus vesiculosus, which lowered molecular weight of fucoidan, was ideal for its application pharmaceutical and food sectors. The aim to study impact ultrasound process parameters on weight, structure, antioxidant activity fucoidan. For optimization sonochemical such as temperature, sonication time, power (intensity), Box–Behnken design (BBD) through response ...

The hydrothermal method as the eco-friendly environmental was used in this study to prepare a high efficient nanocomposite adsorbent based on biochar (BC) derived from Eriobotrya japonica leaves and magnesium oxide nanoparticles (MgO NPs). prepared materials were characterized using FTIR, BET, SEM-EDX, TEM, XRD. adsorption of tartrazine (TZ) BC, MgO NPs, BC@MgO NPs better described by kinetic p...

in this study, the influence of the salts as an additive on the performance of the membrane was investigated and an extensive work was performed to optimize pvdf hollow fiber membranes through a response surface methodology (rsm). the prepared membranes were characterized by sem, contact angle and lep measurement. then, the rsm was used for the optimization of surface pore size, porosity and hy...

conclusions the obtained results indicate that rsm is an effective method for the optimization of culture conditions for hes gene expression in e. coli. results a maximum rhes mrna level of 376.16% was obtained under the following conditions: 0.6 mm iptg, 7 hours post-induction time, and 0.9 cell density before induction. the level of rhes mrna was significantly correlated with post-induction t...

BACKGROUND Carvedilol (CVD) is used for the treatment of essential hypertension, heart failure, and systolic dysfunction after myocardial infarction. Due to its lower aqueous solubility and extensive first-pass metabolism, the absolute bioavailability of CVD does not exceed 30%. To overcome these drawbacks, the objective of this work was to improve the solubility and onset of action of CVD thro...

Pigeon Pea (Casanus Cajan L.) is one of the local foods in South Sulawesi. pea seeds contain protein that body can absorb. This study aims to determine optimum operating conditions for extracting pigeon on and yield using Ultrasonic-Assisted Extraction (UAE). Response Surface Methodology (RSM) with Box-Behnken Design (BBD) was used by considering three variables, time (30, 40, 50 min), temperat...

Abstract The epoxidation process of soybean oil (SBO) and peracid produced by 50 wt% hydrogen peroxide (H 2 O ) formic acid (FA) was studied with sulfuric SO 4 as a catalyst. Three reaction parameters, including temperature, FA-to-SBO ratio, H -to-SBO were investigated, along the combined effect on oxirane value (OV). Based response surface methodology (RSM), Box-Behnken design (BBD) used to op...