The efficiency of using some biological organisms as biological catalysts to reduce the incidence of cantaloupe downy mildew disease under greenhouse conditions.
To tackle the problem of Cantaloupe yield and fruit quality loss due to downy mildew infestations, five biofilters, Trichoderma viride, Trichoderma harzianum, Bacillus megaterium, Bacillus subtilis, and Pseudomonas fluorescens, were tested in combination with the fungicide Ridomil gold plus 71.5 WP. The laboratory results showed that using the biofilters, in addition to the recommended fungicide, reduced the germination of the fungus. The results of the greenhouse showed a reduction in the severity of the disease compared to controls.
Quality preservation in banana fruits packed in pine needle and halloysite nanotube-based ethylene gas scavenging paper during storage.
A newly developed pine needle waste-based ethylene scavenging paper was evaluated for banana storage. The material incorporated nanomaterial halloysite nanotube (HNT) and micro-fibrillated cellulose (MFC). Ultimately, the color, TSS, and pH of the banana remained stable during the ten-day storage time, and the 30% PN/MFC/HNT-based packaging was shown to delay the ripening and senescence of bananas.
Mango dry matter content at harvest to achieve high consumer quality of different cultivars in different growing seasons.
'Palmer' and 'Tommy Atkins' mangoes were chosen to evaluate the relationship between dry matter content (DMC) and resultant soluble solids content (SSC), with consumer acceptance for different seasons and cultivars. The fruits evaluated showed a sharp increase in DMC in summer and winter. Based on the Vis-NIR spectrometer analysis of DMC at harvest, which varied between 50-80 g per kilo, the mangoes were grouped into three categories for the two cultivars and seasons. They were then stored at shipping conditions at 12 o C and 90-95%RH until ripening. Physiochemical and sensory parameter analyses showed that higher DMC at harvest produces higher SSC at ripening. The study showed only a weak effect of cultivar and season on the minimum DMC needed to achieve consumer acceptance.
Gas exchange and chlorophyll fluorescence's characteristics of hyoscyamus muticus L. at different phenological stages under extreme arid environmental conditions, south-western desert, Egypt
A novel oxygen scavenging system, using natural rubber latex (NRL) with a photocatalytic system composed of acetophenone and manganese chloride, was developed and tested to remove oxygen from food packages sensitive to oxidation. The rheology, particle size of 399.6 nm, and zeta value of −23.30 mV show that the stability and viscosity of the NRL/PCS are suitable for coating applications in packages. Colorimetry and FTIRS, conducted before and after the oxygen scavenging, also showed the NRL/PCs system is a sustainable replacement for iron-based oxygen scavengers for food.
Vacuum packaging and ascorbic acid synergistically maintain the quality and flavor of fresh-cut potatoes.
A study evaluated the effect of storing fresh-cut potatoes in vacuum packaging (VP) and immersion in 5g per L ascorbic acid (ASA) on overall vegetable quality. The treatment decreased browning, weight loss, and firmness loss by reducing ethylene generation and respiration levels. It's suppressed the accumulation of malondialdehyde, reactive oxygen species, and phenolics. It also was found to delay increases in glucose, sucrose, and fructose content.
The treatment successfully preserved the taste and flavor of cut potatoes by inhibiting aldehydes due to lipid degradation, responsible for rancid off-flavors.
Dynamics of etiolation monitored by seedling morphology, carotenoid composition, antioxidant level, and photoactivity of protochlorophyllide in arabidopsis thaliana.
Since etiolated Arabidopsis thaliana seedlings are used to study the de-etiolation process, the molecular etiolation dynamics of wild and lutein-deficient (lut2) mutant, between 2 to 12 days of their growth in the absence of light, were studied. Differences in the apical hook curvature and cotyledon opening started after six days of culture. The scientists categorized the seedlings based on differences in apex shapes and monitored the growth quantitatively in each category. In the lut2 mutant, lack of lutein resulted in slower Pchlide accumulation and affected xanthophyll composition. No ion leakage, depletion of antioxidants.
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