Advances in understanding of enzymatic browning in harvested

... re- sulting from PPO activity, then accelerate anthocyanidin degradation, resulting in enzymatic browning (Fig. 1). With an increasing research effort on litchi, our under- standing of the enzymatic browning ... supporting the litchi industry require a better understanding of enzymatic browning. Based on im- proved understanding, reliable technological approaches may be dev...

Ngày tải lên: 18/05/2014, 20:09

... 1989-JOURNAL OF FOOD SCIENCE-999 CONTROL OF ENZYMATIC BROWNING IN APPLE. . . Table 5-Inhibition of enzymatic browning in Granny Smith juice by cyclodaxtrins (CD) and combinations of CD’S with ... against browning in Red Deli- cious and Winesap plugs but induced browning in samples stored 6 or more hours (data not shown). As with CINN, in- duced browning by...

Ngày tải lên: 18/05/2014, 20:10

... polyphenolic pigmentsformed by auto-oxidation of PPO-derived quinones. A large number of interacting genetic and environmental factors influence enzymatic browning in potatoes including tuber dry matter as wellas ... resulting index ranges from 0 to 50. Indices from tubers of 50 lines were determined after in vitro propaga tionand plantinginfieldtrials in Metslawier,northernHo...

Ngày tải lên: 18/05/2014, 20:10

... potato industry. Chemistry of Enzymatic Browning Control of enzymatic browning in fruits and vegetables and in juices and wines requires chemical knowledge of the types of phenolic ... of hydroxylation of a monophenol requires starting at the Met PPO; all subsequent cycles begin with deoxy PPO. Inhibition of Enzymatic Browning In theory...

Ngày tải lên: 18/05/2014, 20:15

... (EA) in inhibiting enzymatic browning at cut surfaces of apple and in raw apple juice was determined by tristimulus calorimetry. Red Deli- cious and Winesap plugs, dipped for 90 set in O&1.6% ... and again after 24 hr and plotted against log time, yielding linear or bilinear curves with an initial region of zero slope. The lag time (time before the onset of browning)...

Ngày tải lên: 18/05/2014, 20:10

... appeared to slow browning of potato slices, but within 30 min after opening the package, onset of browning was ob- served. l44 Dipping of whole, peeled potatoes in a solution containing erythorbic ... effect in the prevention of browning of the juice for 24 h. The main effect of the combination was to increase the lag time for the onset of browning. Granny Smith app...

Ngày tải lên: 18/05/2014, 20:11

... Guaranteeing This strategy was found to fulfill the function of addressing and removing some of the customer’s imaginable and hanging fears involved with buying a product by showing the time of ... more attractive by adding incentives, creating more convincing reasons, finding more credible source, and so on. 4.1.1. Making Messages more Persuasive Strategy of this kind was fou...

Ngày tải lên: 26/11/2013, 13:29

... Whethertheforecastsconsiderpotential losses of revenue,includingwhetheran in- ability of anentitytoobtainletters of credit affectsitsinternationaltrade; • Whetherincreases in thecost of borrowing havebeenfactoredintomanagement’sanaly- sis,includingpotentialincreases in margin soughtbybanksandtheeffect of alternative sources of nancing; • ... Consideration...

Ngày tải lên: 15/03/2014, 20:20

... DNA- binding domain (DBD) and a ligand-binding domain (LBD). The chimeric gene (transactivation domain– DBD–LBD) is expressed under the control of a con- stitutive promoter. In the presence of a ... of a versatile system for the expression of foreign genes in plants. Gene 61, 1–11. 44 Tavva VS, Collins GB & Dinkins RD (2006) Targeted overexpression of the Escherichia coli Mi...

Ngày tải lên: 16/03/2014, 06:20

... Indians forming a tiny portion. The profile of learners included gender; it was found that about 64% of the sample consisted of girls and only 36% of boys. Parent profile Figure 3.1 also indicates ... by shifting some of the financing and control of white schools to parents). As a result of the repeal of the Group Areas Act (No. 41 of 1950) in 1991 and the desegregati...

Ngày tải lên: 16/03/2014, 10:20