carotenoids are red, orange and yellow pigments, which are widely distributed in fruit and vegetables. the aim of this research is to investigate the effect of conventional, high pressure and microwave cooking on the concentrations of β-carotene in carrot and sweet corn. raw carrots were washed, peeled and diced to a uniform size and then frozen at -70°c. sweet corn was also provided in a simil...

The influence of storage conditions on nitrate and nitrite contents, pH, and total viable bacterial count of raw vegetable juices was studied. Three different types of juices from an Estonian small-scale producer and five different types of home-made juices were analysed. Analyses were performed immediately after opening the commercial juice packages and immediately after preparation of a home-...

1. The breakdown and faecal bulking capacity of dietary fibre preparations from wheat bran, apple, cabbage, carrot, and guar gum were compared in man and rat. 2. The degradation of the fibre showed good correlation between man and rat (r 0.99, regression coefficient 0.86). Wheat bran was the least well-digested, 66 and 59% of the neutral sugars being excreted in faeces of man and rat respective...

In Europe and the Mediterranean region, ‘Candidatus Liberibacter solanacearum’ (Lso) is associated with emerging diseases of Apiaceae crops, mainly carrot. Emergency measures for import carrot seed were set, requiring to be heat-treated at 50°C or tested as Lso-negative by PCR. The germination response heat treatment was assessed 24 cultivar hybrid lots. Ten parsley, five fennel, two celery lot...

A single fructose1,6-bisphosphate (FBP) aldolase has been detected in extracts from carrot storage roots (Daucus carota L.). The enzyme was purified 850-fold to electrophoretic homogeneity and a final specific activity of 26.3 amol of FBP utilized/min per mg of protein. SDS/PAGE of the final preparation revealed a single protein-staining band of 40 kDa. The native molecular mass was determined ...

Investigations were carried out to study the effects of selected blanching treatments on the quality of carrots over a temperature range of 80–100C. The blanching treatments selected were steam, water, 0.05 N acetic acid solution and 0.2% calcium chloride solution. These blanching treatments were evaluated with respect to the inactivation time of peroxidase (POD) and catalase, and the process w...

When washed at moderate temperatures, slices of many underground storage organs show a steady rise in their rate of respiration until it reaches a value two to five times that of freshly cut tissue. Laties (3) has recently reviewed our knowledge of these changes in respiration. In accordance with his suggestion, the respiration which develops gradually on washing will be referred to as induced ...

Most information on the biosynthesis of carotenoids is from experiments with fungi, especially Phycomyces blakesleeanus and Mucor hiemalis; with bacteria, notably the photosynthetic bacteria, Rhodospirillum rubrum and Rhodopseudomonas spheroides; and with carrot roots and homogenates, tomato fruit and homogenates, and algae and etiolated seedlings. Synthesis in vitro of carotenoids by the above...