scholarly journals Effect of Time of Harvest, Method of Harvest and Pre Packaging Calcium Chloride Treatments on Shelf Life and Quality of Moringa (Moringa oleifera Lam.) CV. PKM 1

Author(s):  
V Sangeetha ◽  
V. Swaminathan ◽  
A. Beaulah ◽  
A. Rajkumar ◽  
K. Venkatesan
Author(s):  
Maiara Luzia Grigoli OLIVIO ◽  
Elizângela Flávia Jacob ESTEVES ◽  
Dagmar Aparecida de Marco FERRO

Comumente o sulfato de alumínio é o coagulante químico utilizado nas Estações de Tratamentos para a clarificação da água, embora produza um lodo tóxico de difícil deposição no ambiente. No entanto, os coagulantes naturais como sementes de Moringa oleífera Lam. têm demonstrado vantagens para tratamento em comparação aos químicos, pela simplicidade de uso e baixo custo. O estudo objetivou analisar a eficiência coagulante da semente de Moringa oleífera na clarificação de água com turbidez e comparar com os parâmetros do coagulante químico sulfato de alumínio. As amostras de água foram coletadas no Córrego Jacu Queimado e as sementes colhidas em um plantio da própria espécie. Foram realizados, em laboratório, etapas sequenciais do experimento: comparação da eficiência da semente verde e seca, determinação da concentração e tempo de exposição da semente à água, comparação de agitação manual e magnética entre elas e do coagulante biológico com o químico, sendo analisados os aspectos físico, químico e biológico antes e após a adição de ambos. Observou-se que apenas a semente seca realiza a clarificação da água em comparação com os resultados das análises da água clarificada com o sulfato, determinando-se que 5 sementes são eficazes para tratar 1 litro de água com turbidez de até 25,0 NTU, considerando-se mais relevante a agitação manual para o efeito de coagulação e o aguardo de 2 horas para o término da decantação. Conclui-se, que a semente de Moringa é um coagulante biológico que se apresenta como alternativa para o tratamento de água com turbidez, porém, ainda não é indicada para a potabilidade. É preciso dar continuidade ao tratamento em busca de processos que visam melhorar a qualidade da água para aproximar-se aos parâmetros aceitáveis para o consumo humano.   Moringa oleífera Lam SEEDS: EFFICIENT USE OF BIOLOGICAL COAGULANT FOR WATER TURBIDITY TREATMENT, COMPARED TO ALUMINUM SULFATE CHEMICAL COAGULANT   ABSTRACT Aluminum sulfate is a chemical coagulant commonly used at Water Treatment Plants for water clarification, although it produces a toxic sludge of difficult deposition in the environment. However, natural coagulants such as Moringa oleíferaLam seeds have evidenced the advantages for the treatment when compared to chemicals, due to either their simplicity in and low cost.  This research aims at reviewing the efficient use of   Moringa oleífera seeds as coagulants for turbid water clarification as well as comparing the parameters of aluminum sulfate chemical coagulants. The water samples were collected at Córrego Jacu Queimado and the seeds were harvested from a crop of its own species. Sequential steps were performed in the lab for this experiment: Comparison of green and dry seeds efficiency, concentration and time of exposition of the seed to water measurements, comparison of manual and magnetic stirring among them and among biological and chemical coagulants, being analyzed physical, chemical and biological aspects before and after adding both of them. It was observed that only the dry seed enables water clarification when comparing the analysis results to sulfate water clarification, it was ascertained that 5 seeds are efficient to treat a liter of 25,0 NTU turbidity in water, considering as more relevant manual stirring for coagulation effect after a two-hour rest for decantation completion. It was concluded that Moringa seed is a biological coagulant presented as an alternative for turbid water treatment, although it is not indicated for drinkability. Further treatment is necessary in order to keep searching for processes that target to improve the quality of water and meeting acceptable parameters for water consumption.   Keywords: Biological Coagulant. Chemical Coagulant. Efficiency. Water Clarification. Comparative Parameters.


2018 ◽  
Vol 28 (5) ◽  
pp. 578-583 ◽  
Author(s):  
Brian Lawrence ◽  
Juan Carlos Melgar

Maintaining shelf life and postharvest quality of blackberries (Rubus subgenus Rubus) from harvest to consumer is challenging for growers and packers due to several postharvest issues including fresh weight (FW) loss, red drupelet reversion, and fruit leakiness. The time of day blackberries are harvested, the time from harvest to cold storage, and the time in cold storage are factors that may alter the incidence and severity of these postharvest problems. In this experiment, blackberries from 10 cultivars were picked at two different times (7:00–7:30 am and 10:00–10:30 am), delivered to cold storage either immediately or following a 90-minute delay, and evaluated after 1 or 2 weeks in cold storage for FW loss, red drupelet reversion, and leakiness. The response of blackberry postharvest quality to time of harvest, delay to cold storage, and storage length was cultivar-specific. In summary, time of harvest, delay to cold storage or storage length did not affect cultivars Arapaho and Ouachita. Different harvest times did not affect FW or incidence of reddening, but increased leakiness in ‘Chester’ and ‘Triple Crown’; thus, these two cultivars should be preferably harvested early in the morning. Our recommendation for ‘Chester’, ‘Triple Crown’, ‘Osage’, ‘Prime-Ark® Traveler’, and ‘Von’ is to store the fruit of these cultivars as soon as possible. Limiting cold storage to 1 week maintained postharvest quality for at least one attribute of most cultivars (all but Arapaho and Ouachita) compared with 2 weeks of storage.


2011 ◽  
Vol 49 (2) ◽  
pp. 240-245 ◽  
Author(s):  
Suchandra Hazra ◽  
Subhasish Biswas ◽  
Debasish Bhattacharyya ◽  
Sudip Kumar Das ◽  
Anupam Khan

Horticulturae ◽  
2021 ◽  
Vol 7 (9) ◽  
pp. 309
Author(s):  
Said A. Shehata ◽  
Said Z. Abdelrahman ◽  
Mona M. A. Megahed ◽  
Emad A. Abdeldaym ◽  
Mohamed M. El-Mogy ◽  
...  

Tomatoes are perishable fruit that makes them deteriorate rapidly during the post-harvest chain. Therefore, the effect of calcium chloride (CaCl2), chitosan, hydrogen peroxide (H2O2), and ozonated water on the storage abil\ity and quality of tomato fruit (Solanumlycopersicum L. cv. 448) stored at 10 °C for 28 d was studied. Weight loss, firmness, fruit color, total soluble solids (TSS), titratable acidity, total carotenoids, and ascorbic acid content (AsA) of treated tomato fruit were recorded. Our results revealed that all tested treatments significantly extended the shelf-life and maintained quality of tomato fruit compared to the control. Chitosan and CaCl2 were the most effective treatments in maintaining quality attributes. Furthermore, a correlation study suggested that AsA and total carotenoids played a vital role in conserving tomato fruit quality during storage. PC1 had strong positive loading for pH, appearance, firmness, AsA, TSS, carotene, fruit color (L* & b*) and a strong negative loading for lycopene content, color (a), weight loss, and color index. PC2 had high positive loading for total acidity and total sugar content.


2018 ◽  
Vol 4 (2) ◽  
pp. 120
Author(s):  
Wahyu Astiko ◽  
Ahsani Taqwim ◽  
Bambang Budi Santoso

The purpose of the study is to discover the best length and the diameter of Moringa oleifera Lam. stem cuttings to produce high quality of seedlings. The study was conducted during March-May 2017 located in the nursery field at Dasan Agung, Mataram, 16 m asl. This study was experimental research with Complete Randomized Design with three three replications, and each contains 5 serial experiment units. The treatment for stem cutting length (25 cm, 50 cm, and 75 cm) was then combined with different stem cutting diameters (3-4 cm, 4.1-5 cm, and 5.1-6 cm). The result shows that combination of 75 cm stem length with stem  diameter of 5.1-6 cm resulted to have the best seedling growth.The longer the cutting (up to 75 cm), the better the growth of the seedling. The thickest stem diameter (5.1-6 cm) resulted better seedling


2020 ◽  
Vol 9 (4) ◽  
pp. e164943041
Author(s):  
Semirames do Nascimento Silva ◽  
Eliezer da Cunha Siqueira ◽  
Josivanda Palmeira Gomes ◽  
Roberta de Oliveira Sousa Wanderley ◽  
Polyana Barbosa Silva

O objetivo deste trabalho foi avaliar a qualidade química e microbiológica da água de cisternas antes e após o tratamento com sementes de Moringa ou leifera Lam. Como sementes de moringa usadas no trabalho foram compostas no município de Cajazeiras. O coagulante da moringa foi usado em meio aquoso. A água filtrada na obra veio de cisternas construídas no assentamento de Santo Antônio, município de Cajazeiras. A água utilizada foi analisada antes e após o tratamento.Uma análise dos parâmetros: pH, condutividade elétrica, alcalinidade total, provável resíduo e total de dissolvidos foi realizada no Laboratório de Água e Solo e no Laboratório de Microbiologia do Instituto Federal de Educação, Ciência e Tecnologia do Campus da Paraíba, análises de coliformes fecais e Escherichia coli foram mantidos. Todas as estatísticas de substâncias químicas mostram diferenças antes e depois do tratamento. Os controles C1 e C5 apresentam presença de Escherichia coli , os demais são causados pela E. coli .


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