Comparative evaluation of physical properties and volatiles profile of cabbages subjected to hot air and freeze drying was written by Rajkumar, Gomathi;Shanmugam, Saravanan;Galvao, Mercia de Sousa;Dutra Sandes, Rafael Donizete;Leite Neta, Maria Terezinha Santos;Narain, Narendra;Mujumdar, Arun Sadashiv. And the article was included in LWT–Food Science and Technology in 2017.Electric Literature of C4H7NS The following contents are mentioned in the article:
The aim of the present study was to evaluate the phys. parameters, volatiles profile and sensory quality of the cabbage pieces subjected to hot air drying and freeze drying processes. Phys. properties such as water activity, shrinkage, hardness, springiness, cohesiveness, chewiness, rehydration ratio and color measurements were measured using standard procedures while the volatile compounds were determined by the SPME-GC-MS method. The results showed that convective drying of cabbages lead to major adverse changes in phys. and volatile compounds characteristics. Hot air and freeze drying of cabbages display different volatiles profile containing aldehydes, alcs., terpenes, ketones and furans. Better retention of character impact cabbage green and pungent aroma compounds viz. allyl isothiocyanate, di-Me sulfide, di-Me disulfide, 1-octen-3-ol and (Z)-2-penten-1-ol was found in freeze dried cabbage. The presence of 3-(methylthio)-Pr isothiocyanate, Me benzene isothiocyante and Ph Et isothiocyanate is reported here for the first time in fresh cabbages. The flavor components of fresh cabbage were largely retained in the freeze dried product. Freeze drying also leads to pos. sensory effects and better overall acceptability by consumers compared to the hot air dried product. This study involved multiple reactions and reactants, such as Isopropylisothiocyanate (cas: 2253-73-8Electric Literature of C4H7NS).
Isopropylisothiocyanate (cas: 2253-73-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Electric Literature of C4H7NS
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics