There is a great interest in food components that possess possible health-protecting properties, as is the case with flavonoids. Previous research showed that conventional apple juice processing resulted in juices poor in flavonoids and with a low antioxidant activity. This paper shows that it is possible to improve flavonoid content in juice and its antioxidant activity by applying an alcoholi...

Net photosynthetic rates (A) of leaves on 11-year-old, field-grown apple trees (Malus domestica Borkh. cv. Golden Delicious) were measured after removal of fruits at four different stages of development. Defruiting decreased A by 21, 42, 27 and 7% when fruits were growing at 311, 293, 229 and 113 mg(DW) day(-1), respectively. Photosynthesis was inhibited more in the afternoon than in the mornin...

Attached apple leaves (Pyrus malus L., Golden Delicious) began to lose protein in early August as the first sign of senescence. Apple leaf discs prepared from samples before early August gained protein for up to 7 days after detachment. After early August, the loss of protein from leaf discs was no greater than the loss from attached leaves in 7 days. The loss of chlorophyll from leaf discs beg...

W.F. FETT, C. WIJEY, R.A. MOREAU AND S.F. OSMAN. 1999. Ten strains belonging to various Thermomonospora species were tested for their ability to hydrolyse the insoluble plant polyester cutin. One strain, the thermophile T. fusca ATCC 27730, was found to produce a highly inducible cutinase when grown in broth medium containing purified apple cv. Golden Delicious cutin. Apple pomace, tomato peel,...

The Red Delicious has for many years represented the ideal apple and has been a symbol of consistent crispness and delicious flavor. However, changes in the way Red Delicious varieties are bred, distributed, and sold threaten to displace the Red Delicious apple from its central role in the industry. One important component in this shift is the trend in the last decade of breeding Red Delicious ...

A major protease present in dormant bark tissues of the apple (Malus domestica Borkh. cv. "Golden Delicious") was partially purified by hemoglobin-coupled Sepharose column chromatography. The protease active at pH 4.6 and at temperatures of 30 to 50 C was found to be sulfhydryl-dependent. Phenylmercuric acetate inhibited the enzyme approximately 50% at 2 millimolar, whereas phenylmethylsulfonyl...

Kaack K., 2014. Mouldy, musty earthy off-odour of apple fruits – Short communication. Hort. Sci. (Prague), 41: 44–47. Chemical compounds identification that cause the mouldy, musty and earthy off-odours of apple fruit stored in controlled atmosphere at low temperature for several months has been studied. Compounds with off-odour were extracted from cv. Golden Delicious apple peel using ether an...

-1 The residues of hexaconazole dissipated below quantification level of 0.008 μg g and waiting periods of 8.13 and 7.45 days are suggested for Golden Delicious and Starkrimson cultivars at recommended dose in Kashmir. Theoret ical m a x i m u m r e s i d u e contribution TMRC (the theoret ical maximum amount of a pesticide in the daily diet of an average person) values were found to be 17.57 a...