https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33433 Wed 31 Oct 2018 15:26:42 AEDT ]]> https://nova.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 ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33428 -1m^-1Pa^-1), solubility (43.12%) opacity (0.44%) and better mechanical properties, demonstrating the importance of selection of the source of starch. The results also indicated that rice starch had compatibility with ι-carrageenan, and the blend of these two polysaccharides can be potentially used for coating fruit and vegetables.]]> Wed 31 Oct 2018 15:13:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33426 Wed 31 Oct 2018 15:12:41 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33416 Wed 31 Oct 2018 15:06:32 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33418 -1) was tested against the in vitro growth of Alternaria alternata. Prior to extraction, one batch of by-product was dehydrated by freeze-drying (untreated by-product), while the other batch was treated by microwave irradiation in conjunction with freeze-drying (microwave-treated by-product). High-performance liquid chromatography (HPLC) was employed for the identification of individual phenolic compounds with potent antifungal activities. Both lemon by-product aqueous extracts inhibited the mycelial growth and suppressed the spore germination of the fungus in a concentration-dependent manner. In general, the extracts obtained from the microwave-treated lemon by-product displayed enhanced antifungal activity than those obtained from the untreated one. Scanning electron microscopy (SEM) revealed that both lemon by-product extracts affected the hyphal morphology of the fungus. The antifungal activity of the extracts was attributed to their phenolic acid and ascorbic acid contents.]]> Wed 31 Oct 2018 15:06:13 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33417 Wed 31 Oct 2018 15:05:48 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:51658 pure citral > LSTT, with 1000 μL L−1 LM EO the optimal treatment. The greater response of LM over LSTT EO was attributed to its higher concentration of citral but the greater effect over citral suggested some minor constituent(s) of LM EO also had antifungal activity. While the 120 sec dips caused severe rind injury, a 30 sec dip in 1000 µL L−1 LM EO generated only slight injury and inhibited fungal wastage in Valencia and Navel oranges, mandarins and lemons. A 10 sec dip did not cause rind injury but was less effective for mould inhibition. The findings suggest LM EO as an alternative to synthetic fungicides to inhibit wastage in citrus during storage, particularly for organic produce.]]> Wed 28 Feb 2024 14:52:11 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53945 Wed 28 Feb 2024 14:46:00 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52915 Wed 21 Feb 2024 15:41:34 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:51836 Wed 20 Sep 2023 16:11:03 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:45482 Wed 14 Jun 2023 16:44:34 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30206 Wed 11 Apr 2018 11:52:08 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44009 Wed 05 Oct 2022 15:24:59 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33432 Solanum lycopersicum L. cv Neang Pich) were exposed to 13.6 kJ m^-2 UV-C or 0.5 µL L^-1 1-MCP or combination of 13.6 kJ m^-2 UV-C and 0.5 µL L^-1 1-MCP, with appropriate untreated controls. After treatment, tomatoes were stored in air containing 0.1 µL L^-1 ethylene at 20°C and 100% RH. The untreated fruit ripened significantly faster than those of all other treatments. UV-C treatment alone was able to delay fruit ripening by up to 5 days longer compared to untreated fruits whilst the additional of 1-MCP further delayed fruit ripening. UV-C and 1-MCP treatments alone or in combination had significantly slower ethylene production rates throughout the storage period. The fruit treated with the combination of 1-MCP and UV-C was significantly firmer and had higher total phenolic content compared to that of the other treatments. However, there was no difference between treatments in soluble solids content/titratable acids ratio, chlorophyll content, lycopene content and total antioxidant activity. These results show that UV-C and 1-MCP treatment delay ripening and improve the quality of tomatoes in the presence of low-level ethylene during storage. This new treatment could be used to extend the shelf-life of mature green tomatoes through the supply chain without the use of refrigeration.]]> Wed 04 Sep 2019 09:56:41 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52725 Tue 24 Oct 2023 08:31:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32046 p‐coumaric acid content. The highest gallic acid content was recorded in the pomace dried by hot air at 110°C. The results of this study indicate that drying technique should be carefully selected according to the bioactive compounds aimed to be extracted.]]> Tue 24 Apr 2018 15:09:46 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:40821 Tue 19 Jul 2022 09:47:29 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48477 Tue 14 Nov 2023 15:30:07 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:43875 Tue 04 Oct 2022 12:28:48 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33421 Cucurbita pepo var. cylindrica) were stored at low pressure (4 kPa) at 10°C at 100% relative humidity (RH) for 11 days. Fruit quality was examined upon removal and after being transferred to normal atmosphere (101 kPa) at 20°C for three days. Zucchinis stored at low pressure exhibited a 50% reduction in stem-end browning compared with fruit stored at atmospheric pressure (101 kPa) at 10°C. The benefit of low pressure treatment was maintained after the additional three days storage at normal atmospheric pressure at 20°C. Indeed, low pressure treated fruit transferred to regular atmosphere 20°C for three days possessed a significantly lower incidence of postharvest rot compared to fruit stored at regular atmospheric pressure at 10°C. Zucchinis stored at low pressure showed higher levels of acceptability (28% and 36 % respectively) compared to fruit stored at regular atmospheres at 10°C for both assessment times.]]> Tue 03 Sep 2019 18:18:41 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33430 -1, on the growth of fungi isolated from five climacteric fruits (persimmon, pear, tomato, mango and papaya), and three non-climacteric fruits (orange, grape and blueberry). All fungi isolated from climacteric fruits had reduced mycelial growth when held in 0.1 and 1 µL L-1 ethylene but those from non-climacteric fruits showed no effect of ethylene. The finding was unexpected and suggests that fungi that colonise climacteric fruits are advantaged by delaying growth when fruits start to ripen. Since non-climacteric fruits do not exhibit any marked increase in ethylene, colonising pathogens would not need such an adaptive response.]]> Tue 03 Sep 2019 18:08:23 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33467 w) than those produced by spray-drying. Specifically, the MC and a_w of the microparticles produced by freeze-drying ranged from 1.15 to 2.15% and 0.13 to 0.14, respectively, while the MC and a_w of the microparticles produced by spray-drying ranged from 6.06% to 6.60% and 0.33 to 0.40, respectively. Scanning electron microscopy revealed that spray-drying resulted in the formation of spherical particles of different sizes regardless of the type of coating agent. Although freeze-drying resulted in microparticles with amorphous glassy shapes, the mixture of MD + soybean protein resulted in the formation of spherical porous particles. X-ray diffraction revealed a low degree of crystallinity for the samples produced by both techniques.]]> Tue 03 Sep 2019 17:59:14 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34804 -1 of ethylene at either 5, 10 or 20 °C, whilst in a parallel experiment, Navel oranges were exposed to ≤0.001, 0.1 and 1 µL L^-1 ethylene at either 1 or 10 °C. Changes in external and internal postharvest quality parameters were assessed for up to 8 weeks for 'Afourer' mandarins and 10 weeks for Navel oranges. At all storage temperatures, high levels of ethylene were found to increase the level of calyx senescence, weight loss, loss of fruit firmness and respiration rates. Also, there were significant effects of ethylene and storage temperatures on total soluble solids (TSS) content, titratable acidity (TA), and ethanol accumulation in both citrus species. Continuous exposure to high ethylene also significantly reduced vitamin C and ferric reducing antioxidant power (FRAP) in 'Afourer' mandarins after 8 weeks of storage. Overall, ethylene treatments had a significant effect on both the external and internal qualities of the fruit during storage. The relationship between ethylene concentrations and storage temperatures demonstrate that lowering atmospheric ethylene levels at reduced storage temperatures maintain fruit quality during long term storage.]]> Tue 03 Sep 2019 17:58:57 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34803 -2). After treatment, mangoes were stored for 12 d in air (<0.005 µL L^-1 ethylene) or 0.1 µL L^-1 ethylene at 20 °C and 100% relative humidity (RH). Weight loss, peel colour, firmness, ethylene production, respiration rate, total soluble solids (TSS), titratable acidity (TA), total chlorophyll content, total phenolic content (TPC) and total antioxidant activity were assessed at 3-d intervals. The results showed that UV-C treatment delayed skin degreening, reduced endogenous ethylene production, suppressed respiration rate and lowered chlorophyll content compared to untreated control fruit. Fruit treated with UV-C had significantly higher TPC and total antioxidant activity at the end of the storage period than untreated fruits for both storage atmospheres. In addition, UV-C treated fruits remained significantly firmer than untreated fruits. UV-C treatment significantly affected TSS and TA levels in different ways. Storage of fruits in 0.1 µL L^-1 ethylene significantly affected fruit firmness, respiration rate and ethylene production, while other fruit quality parameters were similar to fruit stored in air. These results indicated that UV-C irradiation could be used as an effective and rapid method to extend the postharvest life of mature green mangoes without adversely affecting certain quality attributes in the presence of low-level ethylene during storage.]]> Tue 03 Sep 2019 17:58:50 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:41193 Thu 28 Jul 2022 11:12:21 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39154 Momordica cochinchinensis) is a tropical fruit. It belongs to the Cucurbitaceae family. Gac pulp (or mesocarp) that accounts for 40-50% of fruit weight is commonly discarded during the processing of Gac fruit. However, this by-product is a rich source of nutrients and bioactive compounds, which are potential to produce edible films. This study aimed to determine the effect of sodium alginate, kappa-carrageenan, Gac pulp and glycerol on film properties and optimise the formula of this composite film for further applications using a response surface methodology (RSM). The results showed that sodium alginate, kappa-carrageenan, Gac pulp, and glycerol affected physical and barrier properties, colour parameters, and mechanical properties of the films. The optimal formulation to generate a composite film from Gac pulp include sodium alginate 1.03%, kappa-carrageenan 0.65%, Gac pulp 0.4%, and glycerol 0.85% (w/v), where this film produces high mechanical properties, low water vapour permeability and acceptable physical properties. This optimised film formulation demonstrates a potential for food application.]]> Thu 19 May 2022 16:15:35 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38263 Thu 19 Aug 2021 15:58:37 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48879 Thu 13 Apr 2023 09:59:42 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55030 Backhousia citriodora) essential oil (EO) was investigated to combat Penicillium digitatum by in vitro agar diffusion and vapour assay and in artificially infected oranges. The main constituent of LM EO was revealed as citral when analysed in gas chromatography–mass spectrometry. Pure citral was also included in the experiment for comparison. The in vitro fungal growth was significantly inhibited by LM EO at 1, 2, 3, 4 and 5 μL per disc while complete growth inhibition by both the pure citral and LM EO occurred at 4 and 5 μL per disc. Inoculated fruits treated by dipping in 1000 μL L⁻¹ LM EO solutions for 5, 10, 15, 30 and 120 s showed significantly lower fungal wounds compared to control. While longer dipping times led to some rind injuries, fruits with a 5 and 10 s dip were found free from any injury. The evaluation after dipping and storage confirmed that the fruits maintained the sensory attributes and were not compromised by the incorporation of the essential oil. The results of this study indicate that LM EO can be a promising alternative to synthetic fungicides for preserving the quality of citrus fruits during storage.]]> Thu 04 Apr 2024 10:28:37 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55401 Sat 25 May 2024 10:43:23 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31497 Sat 24 Mar 2018 08:44:08 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19077 NO gas > phosphate buffer > water > untreated. Apple slices dipped in chlorogenic acid dissolved in water showed surface browning soon after application but dipping in DETANO solution negated the effect of chlorogenic acid whether applied before or after dipping in chlorogenic acid solution while the buffer and NO gas were also effective. It is suggested that an increase in phenols occurs on the apple surface soon after cutting, possibly as a defensive mechanism of the apple to limit damage to surface cells. The effectiveness of the applied treatments to inhibit development of surface browning may relate to their ability to minimize the level of phenols active on the cut surface possibly in conjunction with a reduced PPO activity.]]> Sat 24 Mar 2018 08:05:19 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:29651 Sat 24 Mar 2018 07:41:56 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:29664 −1. Under these conditions, the aqueous extracts had the same content of TPC and TF as well as antioxidant capacity in comparison with those of methanol extracts obtained by sonication. Therefore, these conditions could be applied for further extraction and isolation of phenolic compounds from lemon pomace]]> Sat 24 Mar 2018 07:32:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30061 Sat 24 Mar 2018 07:31:19 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30547 Sat 24 Mar 2018 07:27:11 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31216 Solanum lycopersicum cv. Neang Pich) were stored at low pressure (4 kPa) at 10°C for 11 days with 100% RH. Fruit quality was examined upon removal and after being transferred to normal atmosphere (101 kPa) at 20°C for 3 days. Weight loss was significantly lower in fruits which were stored at low pressure (4 kPa) than in fruits that were stored at regular atmosphere (101 kPa) at 10°C. Fruits that were stored at low pressure (4 kPa) reduced calyx browning by 12.5%, and calyx rots by 16%, compared to fruits that were stored at regular atmosphere (101 kPa) at 10°C. Fruit firmness was not significantly different between fruits stored at low pressures (4 kPa) and the normal atmosphere (101 kPa), with an average firmness of 14 N after fruits were stored at 10°C for 11 days. There was no difference in the SSC/TA ratio. The results suggest that a low pressure of 4 kPa at 10°C has potential as an alternative, non-chemical postharvest treatment to improve tomato quality during storage.]]> Mon 23 Sep 2019 12:38:29 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33420 -2 UV-C and 0.5 µL L^-1 1-methylcyclopropene (1-MCP) treatments both separately and in combination. After treatment, fruit were stored in ethylene free (i.e. air containing < 0.005 µL L^-1) or 0.1 µL L^-1 ethylene at 20 °C and 100% RH. The results showed that UV-C treatment delayed skin degreening and reduced endogenous ethylene production compared to untreated control fruit, however these effects reduced over the storage time. As expected, 1-MCP inhibited ethylene production, reduced calyx abscission and retained peel greenness during the storage. Both of the combination treatments, 1-MCP + UV-C and UV-C + 1-MCP reduced endogenous ethylene production and delayed skin yellowing. In all treatments, UV-C and 1-MCP resulted in lower fruit respiration rates than untreated control fruit, however this effect diminished during 7 and 14 days storage for fruits stored in air and 0.1 µL L^-1 ethylene atmosphere, respectively. There was no difference in weight loss, SSC, TA and SSC/TA ratio between the treatments and storage conditions. The results suggest that a pre-storage UV-C treatment, followed by storage at low level of ethylene improves the quality of limes, with the additional improvement when combined with 1-MCP treatment prior or after UV-C irradiation.]]> Mon 14 Jun 2021 18:15:37 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50222 Mon 10 Jul 2023 10:38:29 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55060 Mon 08 Apr 2024 12:31:58 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33429 Capsicum annum L.) were stored under low pressure (4 kPa) at 10°C for 5 and 11 days with 100% RH. The results showed that the incidence of stem decay under low-pressure storage for 5 and 11 days and storage at ambient atmosphere at 20°C for 3 days was lower compared to fruits that were stored at regular atmosphere at 10°C. Fruit that had been stored at low pressure at 10°C had no symptoms of flesh rots for up to 11 days, whilst fruit which had been stored at regular atmosphere at 10°C had 6% flesh rots after 11 days storage at 10°C.There was no difference in flesh firmness and colour retention between fruits stored at low pressure and regular pressure at 10°C. Capsicums stored at low pressure had higher overall acceptability compared to fruit that were stored at regular atmosphere at 10°C. These results demonstrate the potential of low pressure storage as an effective technique to manage capsicum fruit quality, however, there was no additional benefit when fruits were stored at low pressure for more than 5 days.]]> Fri 31 Jan 2020 11:56:09 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46153 Fri 30 Jun 2023 11:20:41 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46556 Fri 25 Nov 2022 11:33:45 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48105 Fri 24 Feb 2023 15:38:11 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47830 Fri 23 Jun 2023 12:02:28 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35108 Fri 21 Jun 2019 10:04:57 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38274 Fri 20 Aug 2021 14:22:31 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:43395 Fri 16 Sep 2022 09:51:41 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48911 Fri 14 Apr 2023 18:33:01 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:41730 Fri 12 Aug 2022 10:39:26 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50214 Fri 07 Jul 2023 12:02:27 AEST ]]>