The effect of sweeteners on fruit flavor perception was studied
through the use of fruitiness power functions for unsweetened and
sweetened model systems. In the first part of the study, two
isosweet concentrations of aspartame and sucrose were determined
and combined with five concentrations of orange and strawberry
flavorants. Fruitiness...
Vitamin K₅, 4-amino-2-methyl-1-naphthol hydrochloride, a
water soluble analog of vitamin K has been shown to possess an antimicrobial
activity toward many bacteria, molds, and yeast. Much
of the work reported in the literature is on its use as a food preservative,
and it was the purpose of this study to...
Proteinase P-II purified from parasitized Pacific whiting muscle was previously
identified to be one form of cathepsin L. It appeared to be present in three isozymatic
forms on non-denaturing PAGE gel stained for activity. Its autolytic degradation was
observed on SDS-PAGE gel under its optimum condition, 55°C and pH 5.5,...
The consequences of extracting com stover feedstock with either 95% ethanol or hot water prior to the chemical analysis of the macrocomponents of that feedstock have been determined. Reports by others have recommended the removal of extraneous substance by solvent extraction prior to chemical analyses (Browning, 1967; TAPPI, 1988). The...
Studies involving freeze-dried methyl linolenate-gelatin foams indicate that the extent of lipid-protein interaction corresponds to the degree of autoxidation of the lipid fraction. It appears that approximately 11% of the malonaldehyde as defined by the 2-thiobarbituric acid test is firmly bound to the protein. The induction period of autoxidation is...
This thesis summarizes an investigation into the need for removing extractives
from herbaceous biomass feedstocks prior to their chemical characterization. Switchgrass
(Panicum virgatum), was used in this study as a representative herbaceous biomass
feedstock. The influence of extractives on the chemical analysis of switchgrass was done
by comparing the composition...
Lignocellulosic biomass is a potential source of fermentable sugars such as glucose. Enzymatic hydrolysis of cellulose is a viable method of solubilizing the glucose from biomass, but the cellulose fraction of native lignocellulosic material is shielded from enzymatic attack by the lignin-hemicellulose matrix surrounding it. Pretreating lignocellulosic biomass with dilute...
The influence of substrate and enzyme concentration on the rate
of saccharification of two defined, insoluble, cellulose substrates,
Avicel and Solka-Floc, by the cellulase enzyme system of Trichoderma
viride has been evaluated. Assays utilized enzyme concentrations
ranging from 0.014 to 0.056 filter paper unit per mL and substrate
concentrations up...
Malt, wort and beer samples representing a single
pilot brew were extracted from Celite columns with Freon
114. Total extracts were analyzed by gas
chromatography/mass spectrometry. Compounds were
identified that were unique or common to beer, wort or
malt and quantities present were determined for those
common to the three...
Commercially bottled, vitamin C-fortified, cranberry
juice cocktail and cranberry-apple (cranapple) juice
drinks were stored at 5°C under simulated home-use
conditions. Ascorbic acid (AA) and dehydroascorbic acid
(DHA) levels were evaluated over a period of seven days by
high performance liquid chromatography (HPLC). Total
vitamin C content was also determined by...