https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 The effect of postharvest UV-C treatment and associated with different storage conditions on the quality of Tahitian limes (Citrus latifolia) https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33431 Citrus latifolia) were exposed to 0 and 7.2 kJm-2 UV-C. After treatments, then stored for 28 days in air at 20°C, 80% RH (control) and in air containing < 0.005 or 0.1 µL.L-1 ethylene at 20°C and 100% RH. Weight loss, peel colour, calyx abscission, ethylene production, respiration rate, soluble solids content (SSC), titratable acidity (TA) and acceptability index were assessed. The results showed that pre-storage UV-C treatment, followed by different storage conditions significantly affected the quality of limes during storage. UV-C treatment significantly affected peel degreening at 20°C in all storage conditions, whereas treated limes showed significantly slower in peel degrening than the control. These effects reduced over the storage time, with the exception of fruits stored in < 0.005 µL.L-1 ethylene which still produced a significantly higher in Hue value after 21 days storage relative to the control. UV-C treatment affected ethylene production during storage under all storage conditions. This effect also diminished with storage time. UV-C treatment did not affect the respiration rate, SSC or TA for all storage conditions. The UV-C treated limes had higher acceptability index than untreated limes up to 14 days storage at 20°C. Storage conditions significantly affected ethylene production, with limes that stored in air exhibiting higher ethylene production than fruits stored in the < 0.005 or 0.1 µL.L-1 ethylene atmosphere. Storage conditions also significantly affected weight loss, with fruits stored in air showing greater weight loss compared to the other storage conditions. The results suggest that a pre-storage UV-C treatment, followed by storage in less than 0.1 µL.L-1 ethylene atmosphere improves the quality of limes postharvest.]]> Wed 31 Oct 2018 15:20:11 AEDT ]]> Development and application of rice starch based edible coating to improve the postharvest storage potential and quality of plum fruit (Prunus salicina) https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33425 Wed 31 Oct 2018 15:05:14 AEDT ]]> Adjuvant chemotherapy in elderly patients with pancreatic cancer https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18744 Wed 11 Apr 2018 10:05:26 AEST ]]> The prognostic and predictive value of serum CA19.9 in pancreatic cancer https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25817 90 U/ml did not benefit from adjuvant chemotherapy (P = 0.7194) compared with those with a CA19.9 of ≤90 U/ml (median 26.0 vs 16.7 months, P = 0.0108). Normalization of CA19.9 within 6 months of resection was also an independent favorable prognostic factor (median 29.9 vs 14.8 months, P = 0.0004) and normal perioperative CA19.9 levels identified a good prognostic group, which was associated with a 5-year survival of 42%. Conclusions: Perioperative serum CA19.9 measurements are informative in patients with detectable CA19.9 (defined by serum levels of >5 U/ml) and have potential clinical utility in predicting outcome and response to adjuvant chemotherapy. Future clinical trials should prioritize incorporation of CA19.9 measurement at key decision points to prospectively validate these findings and facilitate implementation.]]> Tue 24 Aug 2021 14:31:04 AEST ]]> The effects of different drying methods on bioactive compound yield and antioxidant capacity of Phyllanthus amarus https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36239 Tue 17 Mar 2020 12:32:29 AEDT ]]> Postharvest UV-C treatment affects peel degreening 'Kensington Pride' mango fruit stored at 20°C https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48306 Tue 14 Mar 2023 14:34:38 AEDT ]]> Phytochemical, antibacterial and antifungal properties of an aqueous extract of Eucalyptus microcorys leaves https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30608 Eucalyptus and traditionally, many Eucalyptus species have been utilised to heal wounds and treat fungal infections by the Indigenous people of Australia. In view of this, our study was designed to investigate the phytochemical, antibacterial and antifungal properties of crude aqueous extract of E. microcorys leaves. The freeze-dried powdered extract was prepared and the phytochemical profile was studied by analysing the total phenolic content (TPC), total flavonoid content (TFC), proanthocyanidins, antioxidants and saponins. The TPC, TFC and proanthocyanidin values found were: 501.76 ± 14.47 mg of gallic acid equivalents per g, 61.53 ± 0.83 mg of rutin equivalents per g and 10.76 ± 0.89 mg of catechin equivalents per g, respectively. The antioxidant values expressed in mg trolox equivalents per g of extract (mg TE/g) were: ABTS = 1073.13 ± 10.73 mg TE/g, DPPH = 1035.44 ± 65.54 mg TE/g and CUPRAC = 1524.30 ± 66.43 mg TE/g. The powdered extract was also evaluated for activity against three pathogenic bacterial strains (Escherichia coli, Enterobacter aerogenes, Staphylococcus lugdunensis); and three fungal strains (Geotrichum candidum, Aspergillus brasiliensis and Candida albicans) using the disc diffusion method and 96 well plate-based method with resazurin dye. The extract exhibited clear zones of inhibition against the tested bacteria and fungi. Minimum inhibitory concentration (MIC) values were demonstrated to be: A. brasiliensis = 2.44 μg/mL, G. candidum = 4.88 μg/mL, S. lugdunensis = 78 μg/mL, E. coli = 156.25 μg/mL, E. aerogenes = 312.5 μg/mL and C. albicans = 1250 μg/mL. These results reveal the significant potential of E. microcorys as a source of phenolics, antioxidants and antimicrobial agents and also highlight the necessity of further purification and characterisation of solitary bioactive compounds for their prospective applications in food, nutraceutical and pharmaceutical industries.]]> Tue 01 Oct 2019 13:08:19 AEST ]]> The application of UV-C irradiation followed by storage in continuous low level ethylene atmosphere to delay the ripening of mature green tomatoes. https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44712 -2 UV-C irradiation at 20°C. After treatment, tomatoes were stored in continuous air containing either < 0.005 or 0.1 µL L-1 ethylene at 20°C and 100% RH for up to 11 days. The untreated fruit (0 kJm-2 UV-C) ripened significantly faster than UV-C treatments for both storage conditions. UV-C treatments followed by storage at both of < 0.005 and 0.1 µL L-1 ethylene had significantly slower ethylene production rates throughout the ripening period. There was no difference between treatments in fruit TSS, TA and, TSS/TA ratio. After storage, treated fruits with 10.5 and 13.6 kJm-2 UV-C were significantly firmer than untreated fruits for both storage conditions. Overall, tomatoes stored at < 0.005 µL L-1 ethylene were significantly firmer and higher in TSS/TA ratio than fruits stored at 0.1 µL L-1 ethylene. These results show that UV-C treatment delayed ripening of tomatoes in the presence of low level of ethylene during storage. In the absence of ethylene, UV-C treatment resulted in higher firmness value, TSS and TSS/TA ratio. This new treatment could be used to extend the shelf-life of mature green tomatoes through the supply chain without the use of refrigeration.]]> Thu 20 Oct 2022 15:06:25 AEDT ]]> Postharvest UV-C treatment reduces postharvest decay in sweet cherries stored at ambient temperature (20°C) https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44709 -2) and stored for up to 9 days at 20°C or 28 days at 1°C. Fruit quality was assessed by stem colour, stem attachment, development of postharvest rots, flesh colour, fruit firmness, total soluble content and titratable acidity. Fruit exposed to UV-C treatment and storage at 20°C experienced significantly lower levels of postharvest rot, but this response to UVC treatment was not dose dependent. In contrast, UV-C treatment was found to have no significant effect on decay development for treated fruit when later stored for up to 28 days at 1°C. UV-C treatment exhibited no significant impact on stem colour, flesh colour, stem detachment, TSS, TA nor TSS/TA ratio for fruit stored at 20°C, although treated 'Lapin' fruits, showed significantly greater firmness retention relative to the control. Results indicated that under certain conditions, postharvest UV-C treatment has the potential to reduce the incidence of decay and maintaining flesh firmness in sweet cherries stored at ambient temperature (20°C), however, there was no significant effect when stored at 1°C.]]> Thu 20 Oct 2022 14:10:34 AEDT ]]> Effect of UV-C irradiation on sprouting of potatoes in storage https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33532 Solanum tuberosum 'Innovator') were exposed to UV-C light at five different intensities (0.0, 3.4, 7.1, 10.5 and 13.6 kJ m-2). After treatment, potatoes were stored in the dark in air at 20°C and 80% RH for up to 40 days. During storage the potatoes were assessed for the number and length of each sprout at 10 day interval and at the end of 40 days storage, all sprouts were weighed individually. UV-C irradiation significantly affected the number of sprouts. In the first 20 days of storage, the number of sprouts in irradiated potatoes was significantly lower than untreated tubers, however, this effect diminished during storage. UV-C irradiation also affected the sprout length where irradiated potatoes had significantly shorter sprouts than untreated potatoes during storage of 20 days. Similarly this effect diminished over the storage time. The individual weight of the different sprouts was not significantly different between untreated and irradiated tubers. These results indicate promise for UV-C as a potential postharvest treatment to reduce the incidence of sprouting in potato tubers stored in air at 20°C.]]> Thu 15 Nov 2018 10:18:21 AEDT ]]> Fruit-derived phenolic compounds and pancreatic cancer: perspectives from Australian native fruits https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20556 Sat 24 Mar 2018 08:02:35 AEDT ]]> The histone deacetylase SIRT2 stabilizes Myc oncoproteins https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20120 Sat 24 Mar 2018 07:51:46 AEDT ]]> Histone deacetylase 5 blocks neuroblastoma cell differentiation by interacting with N-Myc https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18778 Sat 24 Mar 2018 07:51:10 AEDT ]]> Effect of low pressure storage on the quality of greenhouse cucumbers https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46952 Cucumis sativus L.) were stored under low pressure (4 kPa) at 10℃ for 7 and 11 days with 100% RH. Upon removal from low pressure storage and after being transferred to normal atmosphere (101 kPa) at 20℃ for 3 days, fruits were assessed for weight loss, flesh rots, color, firmness and overall acceptability. Fruit weight loss was significantly higher in fruit which stored at low pressure (4 kPa) for 11 days at 10℃ than fruits that were stored at regular atmospheres (101 kPa) at 10℃. The effect of low pressure treatment on fruit weight loss was greater after the additional three days storage at normal atmospheric pressure at (101 kPa) at 20℃. There was no difference in flesh rots, flesh firmness and color retention between fruits stored at low pressure and regular pressure at 10℃ for 7 and 11 days. Cucumbers were stored at regular pressure (101 kPa) 20℃ for 11 days had highest flesh rots and lowest acceptability compared to other treatments.]]> Fri 09 Dec 2022 15:31:41 AEDT ]]>