An analytical ultrasound-assisted extraction (UAE) method has been optimized and validated for the rapid extraction of stilbenes from grape canes. The influence of sample pre-treatment (oven or freeze-drying) and several extraction variables (solvent, sample-solvent ratio and extraction time between others) on the extraction process were analyzed. The new method allowed the main stilbenes in gr...

We present an efficient procedure for the synthesis of thirty-six N₁,N₄-substituted thiosemicarbazones, including twenty-five ones that are reported for the first time, using a microwave-assisted methodology for the reaction of thiosemicarbazide intermediates with aldehydes in the presence of glacial acetic acid in ethanol and under solvent free conditions. Overall reaction times (20-40 min whe...

Curcumin is a safe substance that used as food cosmetic additive and pharmaceutical product. Obtaining pure curcumin from plant sources very important for fundamental research well the above applications. Efficient extraction purification methods, which meet green chemistry criteria including safety, environment-friendliness, economic requirements, process efficiency are needed. This review pro...

introduction: tea (camellia sinensis), is the most widely beverage after water across the world. the most important chemical composition in tea is phenolic compounds (catechins) that have antioxidant and anticarcinogenic properties and are benefited for cardiovascular disease. there are two major kinds of tea, black tea and green tea. green tea, is originated in china and dates back to several ...

The genus Haplophyllum, which belongs to the Rutaceae family, includes 18 species in Iran. In this study, after collecting plant material, botanical identification and suitable drying, the essential oils from aerial parts of Haplophyllum robustum Bge. were extracted by three different isolation techniques, conventional hydrodistillation (HD), microwave-assisted hydrodistillati...

an air–assisted liquid–liquid microextraction method for the extraction and preconcentration of trace amounts of some synthetic phenolic antioxidants in biological fluids followed by their determination by gas chromatography–flame ionization detection has been reported. in this method the target analytes are extracted into a few microliters of carbon tetrachloride (extraction solvent) from an a...

Carotenoids are pigments found in various types of fruits and vegetables that provide yellow, orange, red colors. This study aimed to extract yellow pumpkin skin using edible oil solvents. The extraction process was carried out ultrasound-assisted (UAE) method with virgin coconut (VCO) palm kernel (PKO). Yellow peel powder sizes 40 mesh 100 were extracted variations time (30 minutes, 60 90 minu...

Persimmon byproduct upcycling was performed by solvent-assisted extraction (SAE) to obtain dietary fiber (DF). The effect of SAE on DF modulation studied specific beneficial and pathogenic strains before after the in vitro digestion process. Overall, digested samples extracted using acetone as a solvent (dCET) showed higher ( p < 0.05) prebiotic activity scores (PASs) bacteria such Bifidobacter...

Triboelectric nanogenerators (TENG) is an effective approach for the development of self-powered systems, as it offers several flexibilities, such wide material choice, high power density, simple fabrication process, etc . In this present work, zeolite imidazole framework (ZIF-8) synthesized by two approaches: solvent-assisted (SA) and solvent-free (HG), explored its applicability in TENG devic...

Fish oil are currently high in demand due to its wide range of therapeutic benefits. High content eicosapentaenoic acid (EPA) and docosahexaenoic (DHA) derived from various sources marine life fish essential human mental developments metabolism. Swamp Eel Fish, scientifically known as Monopterus Albus is a freshwater that highly demands across South-East Asia can easily be found Malaysia. This ...