Peach fruit

Stone Fruit Types. Very preliminary studies of DDT or parathion penetration into peach fruits were completed. The pulp samples were prepared by immersing the intact fruits in boiling water for 1 minute, slipping the skins off, rinsing thoroughly with water and removing the seeds. 

Fig. 3. (Top left) Chemical methods used to depolymerize the polyesters. (Top right) Thin-layer and gas-liquid chromatograms (as trimethylsilyl derivatives) of the monomer mixture obtained from the cutin of peach fruits by LiAlD4 treatment. In the thin-layer chromatogram the five major spots are, from the bottom, C18 tetraol, C16 triol, and C18 triol (unresolved), diols, and primary alcohol. Nx = C16 alcohol N2= C18 alcohol Mj = C16 diol M2 = C18 diol D = C16 triol D2 and D3 = unsaturated and saturated C18 triol, respectively, T4 and T2, unsaturated and saturated C18 tetraol, respectively. (Bottom) Mass spectrum of component D3 in the gas chromatogram. BSA = bis-N,O-trimethylsilyl acetamide...

Wright and Kader reported that there were no significant changes in the (3-carotene content of sliced peach fruit over the time of storage (Wright and Kader 1997a), with the exception of fruit stored under air + 12% CO2 the treatment resulted in a... 

Yao HJ and Tian SP. 2005. Effects of biocontrol agent and methyl jasmonate on postharvest diseases of peach fruit and the possible mechanisms involved. J Appl Microbiol 98 941-950. 

Mahmoud MF. Combining the botanical insecticides NSK extract, NeemAzal T 5%, Neemix 4.5% and the entomopathogenic nematode Steinemema feltiae Cross N33 to control the peach fruit fly, Bactrocera zonata (Saunders). Plant Protect Sci. 2007 43 19-25. 

Dr. Brady of the University of Georgia is conducting a study to determine disulfoton s dissipation on peach fruit, on foliage, in soil, in tank mixes, and in building interiors. 

Ritchie, D.F. 1983. Mycelial growth, peach fruit-rotting capability, and sporulation of strains of Monilinia fructicola resistant to dichloran, iprodione, procymidone, and vinclozolin. Phytopathology 73 44-47. 

Kingsly, A.R.P, Balasubramaniam, V.M., and Rastogi, N.K. 2009b. Influence of high pressure blanching on polyphenoloxidase activity of peach fruits and its drying behavior. International Journal of Food Properties. 12(3) 671-680. 

Japanese female peach fruit moth have been synthesised (Scheme 10).2 9 The phosphine oxide starting material (51) was obtained from a Wittig reaction of the ylide derived from 1,1-diphenylphospholanium perchlorate. The reaction of (l-methyl-2-propenyl)diphenylphosphine oxide carbanion (55) with the optically active aldehyde (54) is the key step in a short synthesis of the sesquiterpenes (-)-a-selinene (58) and (-t-)-a-helmiscapene... 

Table II shows that sucrose levels are highest in peach fruit and very low in blackberry, cherry, and grape. The % C.V. for sucrose content for many of the fruit samples is extremely high, most likely because of enzymic or chemical hydrolysis. The average sucrose content of plum fruit is 38 of total sugars, while processed plums contain only 1. Presence of large quantities of sucrose in prune juice has, in fact, been used as an indication of adulteration ( ). Cherries and grapes contain invertase Cllj 12) which may account for sucrose not being detected in some samples and may also explain the high % C.V. for those fruits. In examining apple Juice concentrates, we did not detect sucrose in seven-fold concentrates whereas we did in fo ar-fold apple concentrates (7.) > the time-temperature conditions allowing for complete hydrolysis in the more concentrated product.

Acetamiprid (2) is a broad-spectrum insecticide that is ovicidal and larvicidal against a wide range of sucking insects such as Hemiptera (especially aphids) or adults of Thysanoptera, Isoptera and Coleoptera pests. It has contact, stomach and systemic long-lasting action and is moderately activity against Lepidoptera such as the peach fruit moth Carposina niponensis), the oriental fruit moth Grapholita molesta), and the diamond back moth Plutella xylostella) and has ovicidal effects on these species as well (Table 29.2.1.6) [29]. 

Active component of female sex pheromone of the peach fruit moth Carposina nipponensis. 

Woodroof, J. G., and Cecil, S. R., and Thompson, H. H. 1943. Improving the quality of preserves made from sulfited peaches. Fruit Products J. 22, 269,... 

Phenolic Content and L-Phenylalanine Ammonia-Lyase Activity in Peach Fruit... 

In this chapter, methods of quantitative and qualitative analysis of phenolic compounds in peach fruit, and of measurement of PAL activity will be described with special reference to astringency. The relationship between the phenolic content and PAL activity in peach fruit, and some factors affecting the content and activity, will be discussed. 

The analysis by HPLC of phenolic compounds in peach fruit in our laboratory is done as follows. AU chemicals are reagent-grade products. Three separate batches of 5 g each of mesocarp tissue are blended in a mortar with 10 ml of 80% (v/v) acetone, and the homogenate is filtered through a Buchner funnel with suction. The three extracts are collected, centrifuged to dryness at below 30 °C, lyophilized and stored until analysis. After dissolution of the extract, 1 ml of 50% methanol is added to each sample, and the solution is centrifuged for 10 min at 12 000 g. Portions (2[rl) of the supernatant are separated into components by HPLC. Authentic phenolic compounds are analyzed also. The unknown com-... 

Table 1. Effects of soil moisture stress during stage 3 of fruit growth on fruit weight, total soluble solids and phenolic contents at harvest, and PAL activity of Sanyo-suimitsu peach fruit (Kubota and Kudo 1992)...

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