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The experiment was conducted at the Experimental Station near Krakow in 2008 and 2009. The objects of the experiment were twelve-year-old pear trees cv. 'Confer­ence'. The aim of the experiment was to evaluate the effect of three commercial preparations, containing two forms of the auxin NAA and the cytokinin BA, on the fruit set, total yield, fruit weight and the firmness, acidity and soluble solids content of the flesh. Treatments were carried out when fruitlets were 12 mm in diameter. Control trees were not treated. All the combinations used decreased fruit set and total yield, but increased fruit weight. The applied preparations had no clear effect on the acidity and soluble solids content of the fruit juice. None of the treatments affected fruit firmness, acidity and soluble solids content of the fruit juice after harvest and after storage.
Treatment with 1-methylcyclopropene (1-MCP), an ethylene inhibitor, considera­bly prolongs the storage and shelf life of apples, and diminishes the occurrence of some physiological diseases, such as scald. Various fruit quality parameters define fruit acceptance by consumers, while some also determine the storability of fruits, including firmness, acidity and internal ethylene concentration. The aroma of apples is regarded as one of the most important quality parameters. Many factors influence the aroma profile, with ethylene having a key role in the biosynthesis of flavour com­pounds. 1-MCP is an inhibitor of ethylene synthesis and is now widely used. We tested apples of the three main cultivars grown in Slovenia ('Idared', 'Jonagold' and 'Golden Delicious') following their treatment with 1 ^l l-1 1-MCP at +1 °C, with 6 months of storage under standard ultra-low oxygen storage conditions (1.2% O2, 1.5% CO2). The fruits were analysed for firmness and ground colour, with headspace analy­ses of the aroma compounds, before and after storage. Compared with the control fruits, 1 -MCP-treated apples had significantly improved firmness and colour parame­ters (L*, a*, b*), but showed strong inhibition of total aroma production. Among the aroma compounds, the esters were most severely suppressed by the treatment with 1 - MCP, with the exception of 2-methylethyl acetate. In general, 1-MCP positively af­fected most of the quality parameters (fruit firmness, ground colour, acidity), but greatly suppressed the synthesis of the aroma volatiles.
Water evaporation and changes in texture and colour caused by biophysical proc­esses are important in fruit storage. Using various modified atmospheres, fruits of apple cultivars 'Staris', 'Auksis', 'Cortland' and 'Spartan' were stored at +1± 1 °C and relative humidity of 90-95%. The fruits were tested in the Biochemistry and Technology laboratory of the Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry. Fruit texture and the colour parameters: L*, a*, b*, h° and C were measured before and after 8 months of storage. Soluble solids, respiration rate, sugar content and the amount of ascorbic acid were determined with standard meth­ods. It was found that skin firmness of 'Spartan' apples was the highest (355.4 N/cm2). 'Auksis' apples had the softest skin (215.8 N/cm2). Fruit firmness changed slightly when the carbon dioxide concentration in the modified atmosphere was increased. The same tendency was found for flesh firmness at 2% and 4% of carbon dioxide. The amounts of soluble solids and sugars in fruits at 4% CO2 were stable. The obtained results showed that ascorbic acid losses in the modified atmos­pheres with 2% and 4% CO2 were respectively 18% and 10.5%. Fruit colour proper­ties were more affected in terms of the colour coordinates a* and b*.
The aim of the present study was to investigate the influence of different bioferilizers on the yield, fruit quality and storage properties of ‘Sampion’ apples. Foliar sprays of AlgaminoPlant and Goëmar BM 86 were conducted once or three times, whereas HumiPlant was used for ground spraying. An assessment of the total yield, mean weight of fruit, fruit firmness (FF), soluble solids content (SSC), titratable acidity (TA) was performed at harvest as well as after the storage period (150 days). The obtained data indicate an overall beneficial effect on the yield and its quality. Foliar sprays increased the total yield of the investigated apple trees. Goëmar BM 86 and HumiPlant significantly enhanced the mean fruit weight as compared to the control. Apples treated with Goëmar BM 86 showed the highest fruit firmness and soluble solids content, however titratable acidity was at the lowest level. Treated apples revealed a lower organic acids reduction after the storage.
The aim of the experiment was to determine the effect of two storage tempera­tures (+1 °C and +4 °C) and modified atmosphere packaging (MAP) on the posthar- vest quality of 'Glen Ample' raspberry. Fruits were picked into 450-g well-ventilated plastic punnets, cooled down for 24 hours and packed as follows: control - unpacked ventilated punnets covered with a lid; punnets wrapped in Xtend® film, punnets wrapped with PP30 - 30 ^m polypropylene film and punnets wrapped with OPP25 - 25 ^m oriented polypropylene film. One treatment consisted of eight replicate bags. After 3 days in cool storage, all packages were kept at +15 °C for 24 hours to simulate retail conditions. The O2 and CO2 content in the packages was measured daily. Soluble solids con­tent (SSC), titratable acidity (TA), fruit firmness, ascorbic acid content (AAC), antho- cyanins (ACY) and total antioxidant capacity (TAC) were determined at harvest and at the end of storage. The number of spoiled fruits was recorded and a sensory evalua­tion was carried out at the end of the experiment. Vol. 19(1) 2011: 145-153 During the first 24 hours, the concentration of CO2 increased to 10% in the PP30 and OPP25 packages at +4 °C, while at +1 °C it took 48 hours to reach that level. In the Xtend® packages, CO2 concentration increased above 10% only after the shelf life simulation. The environment in the PP30 and OPP25 packages became anaerobic in retail conditions. Fruit spoilage was significantly lower in the PP30 and OPP25 pack­ages, where the CO2 content increased rapidly. Raspberries had higher SSC, TA, SSC/TA and ACY at +4 °C than at +1 °C. Fruits in the Xtend® packages were significantly firmer than in the other treatments. The mean effect of MAP and the storage temperatures was such that they had no significant influence on raspberry fruit appearance, flavour and off- flavour. Raspberries kept at +4 °C tasted better to the evaluators.
Four tomato cultivars Macarena F₁, Faustine F₁, Cathy F₁ and Fanny F₁ were used in the study. Transplants were grown in a greenhouse. Seeds were sown at the end of March. The plants were grafted on Maxifort F₁ rootstock on April 5, 6 and 21 in the years 2006, 2007, 2008 without the use of biostimulators. In the case of the other combinations each year the following treatments with biostimulators were performed: watering with Goteo 0.1% solution (twice – 4 and 2 weeks before planting and three times after planting at three-week intervals), spraying with BM 86 0.1% solution (four times every three weeks starting at the blooming of the first cluster). In the control combination plants were untreated with biostimulators and were not grafted. Physical properties were determined and sensory analysis of tomato fruit was performed. The results showed that there was no significant influence of the applied preparations on the a*/b* value of fruits which depended mostly on the cultivars. The highest fruit firmness was obtained with BM preparation and in Faustine F₁ and Cathy F₁ cultivars. There was no significant influence of the preparations on sensory quality of fruits. Variability in sensory quality of fruits rather depended on the analyzed cultivars than on the investigated combination.
The effects of combined aminoethoxyvinylglycine (AVG) and modified atmosphere packaging (MAP) treatments on quality attributes of ‘0900 Ziraat’ sweet cherry fruit during the cold storage and shelf life were investigated in this study. Significantly lower weight loss and decay ratios were observed in all treatments throughout the cold storage period as compared to the control. A similar case was also observed referring to the shelf life. MAP treatments were found to be more effective in retarding the weight loss and decay ratio. Higher hue angle values were measured from AVG-treated fruit at harvest. Similarly, hue angle of AVG and MAP-treated fruit were also higher than for the control in all periods of cold storage and on the 7th and 21st day of shelf life. AVG-treated fruit had higher firmness values than the control at harvest. However, higher firmness values were measured from MAP-treated fruit during the cold storage and shelf life. At the end of cold storage, lower SSC and higher titratable acidity values were observed in AVG and MAP-treated fruit than in the control. AVG + MAP treatments yielded significantly higher vitamin C, total phenolics and antioxidant activity values than the control. Contrarily, the control fruit had significantly higher total monomeric anthocyanin than the other treatments. Based on current findings, it was concluded that combined AVG + MAP treatments could be used as a beneficial tool to maintain the quality of sweet cherry fruit throughout the cold storage and shelf life.
The aim of this paper was to present the preferences of apple consumers (students) concerned on the functional and sensory apples’ quality features: the apple cultivar and taste, skin colour, fruit size and fruit firmness. The survey data were collected in the years 2009 and 2011 among 265 and 208 students of the Poznan University of Life Sciences. The respondents completed the survey questionnaires in presence of the researcher. The respondents could choose no more than three of the listed apple cultivars. Further- more the respondents could choose one answer from each list of the preferable apples quality features (taste, skin colour, fruit size and firmness of flesh). The most preferred apple cultivars were: Lobo, Jonagold, Szampion, Golden Delicious and Cortland. The percentage of students whose did not know the name of the apple cultivar they consumed was high and it amounted to 17% in 2009 and 24% in 2011. Students preferred sweet-winy taste of apples, the red colour of fruit skin, with blush, the fruits of medium size and tough. The colour of apple skin was the least important quality feature - it did not matter for more than 1/3 of respondents, mainly males. The differences between males and females students appeared in taste of apple fruits and firmness of flesh. The sour taste of apples was preferred by relatively more males than females and for bigger percentage of males the taste of fruits was not important. More females preferred sweet and very sweet apples and tough.
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