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Food analysis is important for the evaluation of nutritional value and toxic contaminants in foods. An investigation of volatile compounds from prepared sweetpotato breads (SPBs) was observed using gas-chromatography mass-spectrometry (GC-MS) and solid phase micro-extraction (SPME). Three SPBs containing 50% sweetpotato flour (SPF) and 50% hard red spring wheat flour (HRSWF) were prepared without dough enhancer (NE), with dough enhancer (DE) and dough enhancer with starch (DES). Eight classes of compounds were identified which included alcohols, acids, aldehydes, alkanes, alkenes, esters, ether and ketones. Acetic acid, ethanol and dimethyl phthalate were among the compounds that were identified in this study.

Spaceflight introduces the human body to extremes not normally experienced in daily life to supplement the body's natural protections for some of the negative effects; important nutrients must be included in an astronaut's diet. Therefore the objective of this study was to evaluate chemical properties (amylose/amylopectin, dietary fiber, sugars and vitamin C) in two processed and unprocessed hydroponic sweetpotato cultivars. In both cultivars dietary fiber ranged from 0.4% to 3%. Amylose/Amylopectin ratio in both cultivars ranged from 1/99% to 14/86%. Glucose and sucrose were the dominant sugars in both cultivars. Vitamin C was reduced 35-50% when processed.

This study determined volatile emission from model sweetpotato products using different evaluation methods. Sublimation method and Thermogravimetric Analysis (TGA) coupled to Fourier Transform Infrared (FTIR) were used to assess the volatiles from a Ready-to-eat-breakfast cereal (RTEBC). TGA/FTIR, and Solid-Phase Microextraction Method (SPME) and gas-chromatography mass spectrometry (GC-MS) were used to characterize volatiles in sweetpotato breads (SPB). FTIR peaks at 3500 (alcohols), 2400 (carbon dioxide), and 1900 (ketones) were identified in the RTEBC. For SPME/GC-MS measures, Dimethyl Phthalate (33±0.51), Phenol (39±0.52) and Diazene (48±0.280) were observed in doughs made using different cultivars.

This study compared the physicochemical properties and consumer acceptance of seven nutrient film technique (NFT) and eight microporous tube membrane nutrient delivery system (MTMS) grown hydroponic carrots. NFT-grown carrots had moisture contents range from 86.3–92.1% while the MTMS-grown carrots a range of 82.0–92.0%. β-carotene contents for the NFT-carrots ranged between 2,030–9,900 μg/100 g and for the MTMS-carrots between 2,977–10,488 μg/100 g. Royal Chantenay-NFT- and Mignon-MTMS-grown were the lightest in color, whereas, Mignon-NFT, and Little Finger-MTMS were the darkest. Paramex MTMS-grown was the most acceptable cultivar to the consumers. Paramex, Kinko and Mignon have good potential to be considered for further screening.