Metabolic Profiling of Chestnut Shell () Cultivars Using UPLC-QTOF-MS and Their Antioxidant Capacity.

The inner shell of the chestnut () has long been used in Asia as a medicinal herb for improving digestion and blood circulation, and treating diarrhea. However, most chestnut shells are now treated as waste materials in industrial peeling processes. In this study, we examined the metabolite variation among major cultivars of shells using mass spectrometry.

Metabolite Profiling of Chestnut () According to Origin and Harvest Time Using H NMR Spectroscopy.

Chestnuts are an important food crop commonly used as a food ingredient due to their nutritional properties and potential health benefits. In Korea, chestnuts have been crossbred to develop cultivars with insect resistance and high productivity, producing multiple chestnut varieties. This study classified 17 cultivars produced in Korea according to origin and harvest time and determined the metabolites in chestnut kernels using H nuclear magnetic resonance spectroscopy.

Analysis of Volatile Compounds in Coffee Prepared by Various Brewing and Roasting Methods.

Volatile compounds of coffee brewed under various roasting conditions and by different brewing methods were analyzed. Green coffee beans () were roasted at 235 °C for 13 min, 240 °C for 15 min, and 245 °C for 17 min. Roasted coffee beans were ground into particles of three different sizes (710, 500, and 355 μm) and brewed by an espresso coffee machine and the cold brew method.

Analyzing Gluten Content in Various Food Products Using Different Types of ELISA Test Kits.

Gluten is an insoluble protein produced when glutelins and prolamins, which are found in grains such as wheat, barley, and oats, combine to form an elastic thin film. This dietary gluten can cause severe contraction of the intestinal mucous membrane in some people, preventing nutrient absorption. This condition, called celiac disease (CD), affects approximately 1% of the world's population.