Spinach packing app: Spinach packaging app manages all spinach packaging processes including spinach quality control, spinach inventory, and spinach sales logistics shipping.
Spinach packing for RTE products:
One of the most frequent presentations in fresh is the arrangement of loose leaves or whole bushes in bunches. Pre-packaging is carried out in trays covered with plastic film or in plastic bags. In the last few years we have seen the rise of a tendency to sell loose spinach leaves, already washed and packaged in plastic bags. The packaging is carried out in boxes containing a maximum of 10 kg of homogenous content, that is to say, either loose leaves or whole plants.
Fresh-cut spinach leaves were stored for 4 days at 15C and 75% relative humidity under modiﬁed atmosphere packaging to assess the impact of differential in-packgas atmospheres generated through different packaging ﬁlms and variable in-pack weight on the quality of stored produce. After 4 days of storage, retention of chloro-phyll, b-carotene and ascorbic acid was better in low-density polyethylene (LDPE)packages than in polypropylene (PP) packages. LDPE ﬁlm-packaged samples had higher phenolic content than PP ﬁlm-packaged samples. Low in-pack O2(1–2 kPa)along with the buildup of CO2(8–10 kPa) seems to have enhanced the retention of antioxidant components, i.e., b-carotene and ascorbic acid, in LDPE packages. This helped in chlorophyll retention and also prevented formation of oxidation com-pounds of phenols that otherwise caused browning of cut surfaces. Thus, O2andCO2permeability of packaging ﬁlm or in-pack weight of produce might be such that equilibrated O2partial pressures remain near to 1–2 kPa so as to affect a beneﬁcial increase in the phenolic content along with concomitant retention of chlorophyll.
Fresh-cut spinach leaves have received an enormous demand due to their utility in various traditional Indian preparations. Shelf life and quality of fresh-cut produce may be greatly reduced due to high rates of respiration. Traditional packaging and handling techniques reduce the shelf life and sensory quality of fresh-cut spinach. Temperature control and atmospheric modiﬁcations help to maintain produce quality by reducing respiration rate and enhance shelf life by minimizing the adverse effects of cutting. This research focused on evaluation of respiratory behavior of fresh-cut spinach leaves at a temperature commonly encountered during transportation and retail distribution, i.e., 15C, and the effect of different polymeric ﬁlms and in-pack weights on produce quality. The results of the study suggest that packaging of fresh-cut spinach in polymeric ﬁlm packages could maintain the sensory quality and reduce degradation of various physicochemical constituents. Utilization of the results for proper design of modiﬁed atmosphere packages for this highly perishable produce can prove to be extremely beneﬁcial for safe storage and transportation to urban retail mar kets. Vegetables occupy a signiﬁcant place in human diet and provide vitamins and minerals essential for human health and growth. With the increasing availability, a shift in the consumption pattern in favor of vegetables is being observed in all the socioeconomic groups of people living in either rural or urban areas (Kumar et al.2004).
The biggest problem faced by the food industry in South Africa is the maintenance of quality of fresh produce during post-harvest storage (Munhuweyi et al., 2016).Attempts to reduce losses and maintain quality of fresh food, primarily fruits and vegetables, during postharvest storage has been a challenge and priority for the food industry (Velickova et al., 2013). Strategies to prolong the shelf life of fresh-cut vegetables during storage are necessary to pre-serve their nutritional value and to assure food safety (Conte et al., 2008; Ninfali and Bacchiocca, 2004).Modiﬁed atmosphere packaging (MAP) is the technique of sealing actively respiring pro-duce, fresh fruit and vegetables, in polymeric ﬁlm packages to achieve the modiﬁcation of the O2and CO2levels within the package atmosphere (Mir and Beaudry, 2004).
The MA packaging technology is said to be efﬁcient in maintaining shelf life of fresh produce during storage (Sandhya, 2010).Church and Parsons (1995) reported that the combination of oxygen (O2), nitrogen (N2),and carbon dioxide (CO2) is frequently used when operating the MAP during storage, based on its efﬁciency and speciﬁc effect it has in slowing down the metabolism process of the produce. The high CO2or low O2concentrations diminish respiration rate, thus, reduces the occurrence of aerobic bacteria and deterioration rate of the stored product (Babic and Watada, 1996).The concentrations of O2in MAP during storage of fresh-cut fruits and vegetables for both quality and safety should range between1% and 5% (Sandhya, 2010), whereas CO2concentrations should be above 10% (Zagoryand Kader, 1988). Izumi et al. (1997) demonstrated the beneﬁts of low O2atmosphereson spinach during storage.
Ready-to-eat (RTE) leafy vegetables are the fastest increasing sector of the UK and Europe markets. Spinach (Spinacia oleracea) is one of the main leafy vegetables contributing to the RTE industry. Due to its tender and soft texture, spinach leaves tend to undergo different degrees of injuries during processing steps which affect their quality and shelf life. In this study, the effect of compression on quality degradation of spinach leaves during storage was investigated. Spinach leaves were subjected to compression using Universal Testing Machine where Young’s modulus for spinach in bulk amount; imitating packaged spinach in the industry was evaluated. Visual appearance was assessed by Population test where leaves were classified into categories according to degree of damage and percentage of deterioration was evaluated by analyzing RGB images using ImageJ.
SPINACH PACKING SYSTEMS:
Spanish iceberg (SI) had the range of E values from 1.1 - 2.0 MPa and 2.3 MPa - 4.4 MPa for ER and SI respectively
depending on the orientations of the sample position during the test . Leaves (Calophyllum inophyllum L.) have E
values range from 186.4 – 240.2 MPa and 49.8 – 67.5 MPa when tested along and across the veins respectively .
Under compression test, potato was found to have range of E values from 3 to 6 MPa depending on the turgidity .
Studies on the mechanical properties for yucca, apple and pear also had been reported . The E values for baby
spinach under tensile test in diagonal, perpendicular, and parallel directions were reported to be 1.084MPa, 0.3914
MPa and 2.137MPa respectively .
Although there has been work reported on the mechanical property of spinach, there is still lack of study to
determine the mechanical property of spinach in bulk amount; imitating the packaging bags of RTE spinach in the
industry. Most mechanical properties reported from the literature were performed onto individual materials not in bulk
amount; by performing mechanical tests such as tensile test, compression test, cutting, tearing, and shearing. Basic
data on the mechanical property of bulk spinach treated under various conditions was not available in the literature.
Study on the mechanical property of bulk spinach is necessary in order to improve the distribution chain of the
packaged RTE spinach thus improving the quality and shelf life of the products. Therefore, in this study, the
measurement of the mechanical property of bulk spinach was conducted by performing compression test where E
values and bulk densities were evaluated. Different leaf injuries were assessed by Population test, where the leaves
were group into degrees of injuries and the microstructures of the leaves were observed under the light microscope.