Control of post-harvest storage losses in water chestnut (Trapa bispinosa Roxburg) fruits by natural functional herbal coating and gamma radiation processing

2021 ◽  
Author(s):  
Nazia Hussain ◽  
S. S. Shukla ◽  
Alok Dhar Dubey ◽  
Satyendra Gautam ◽  
Jyoti Tripathi
Keyword(s):  
Gamma Radiation ◽  
Radiation Processing ◽  
Post Harvest ◽  
Storage Losses ◽  
Water Chestnut

scholarly journals Facile preparation of new polystyrene leucomalachite green thick films and study of their radiochromic behavior for low doses of gamma radiation

2017 ◽  
Vol 5 (2) ◽  
pp. 80
Author(s):  
Anuradha Bera ◽  
Shatrughan Malav ◽  
Bajrang Lal Tiwari ◽  
Shyam Govind Vaijapurkar
Keyword(s):  
Film Thickness ◽  
Gamma Radiation ◽  
Thick Films ◽  
Radiation Processing ◽  
Γ Radiation ◽  
Dye Loading ◽  
Leucomalachite Green ◽  
Colour Development ◽  
Green Coloration ◽  
Potential Use

Colourless polystyrene-leucomalachite green (PS-LMG) thick films containing a suitable chloroalkane were prepared by a fast and facile casting method, and were investigated for their radio chromic response behavior under the influence of 1.25 MeV γ-radiation. Their gamma response was studied in the 0.05 kGy to 10 kGy range to evaluate their suitability for potential use as the dosimeter in the radiation processing industries. The films were found to undergo a visibly distinct green coloration in the studied range, with the colour intensity increasing with an increase in the total dose. The radiochromic response of these films when investigated as a function of film thickness showed that the colour development as well as the linearity of the response was markedly affected by the thickness of the films. The effect of dye loading and the chloroalkane concentration on the radiochromic response of these films were also investigated. Depending upon the film thickness and reactant concentrations, the films were found to be capable of visually detecting gamma radiation doses as low as few tens of grays.

scholarly journals Synthesis of Polyvinyl Pirrolidone (PVC) /Κ-Carrageenan Hydrogel Prepared by Gamma Radiation Processing As a Function of Dose and PVP Concentration

2013 ◽  
Vol 13 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Erizal Erizal ◽  
Tjahyono Tjahyono ◽  
Dian PP ◽  
Darmawan Darmawan
Keyword(s):  
Tensile Strength ◽  
Gamma Radiation ◽  
Water Absorption ◽  
Chemical Change ◽  
Wound Dressings ◽  
Water Evaporation ◽  
Radiation Processing ◽  
Elongation At Break ◽  
Gel Fraction ◽  
Radiation Technique

The aim of this research is to prepare a biomaterial to be used in health care. A series of hydrogels based on polyvinyl pyrrolidone (PVP)/κ-Carrageenan (KC) has been prepared by radiation technique. PVP (5-15%) were mixed with ΚC (2%) and irradiated by gamma rays at the doses from 25 kGy to 35 kGy (dose rate 7 kGy/h) at room temperature. The chemical change of hydrogels was characterized using Fourier Transform infra Red (FTIR). Gel fraction, water absorption and water evaporation were determined gravimetrically. Tensile strength and elongation at break was measured using Instron meter. It was found that with the increase irradiation dose and PVP concentration, the gel fraction and tensile strength of hydrogels increase. In contrast the elongation at break and water absorption of hydrogels decrease. The hydrogel of PVP/KC hydrogel produced by gamma radiation can be considered for wound dressings.

Post Harvest and Cold Storage Losses in Apple of Balochistan

2001 ◽  
Vol 1 (1) ◽  
pp. 65-66
Author(s):  
Nisar Ali Shah . ◽  
Shahjahan Khan . ◽  
Manzoor Ahmad Kasi . ◽  
S. M. Khair .
Keyword(s):  
Cold Storage ◽  
Post Harvest ◽  
Storage Losses

Prepackaging, Storage Losses and Physiological Changes of Fresh Bitter Gourd as Influenced by Post Harvest Treatments

2004 ◽  
Vol 4 (5) ◽  
pp. 613-615
Author(s):  
Swagatam Talukder . ◽  
K.M. Khalequzzaman . ◽  
M.N.A. Chowdhury . ◽  
S.M.K.E. Khuda . ◽  
Md. Masud Alam .
Keyword(s):  
Bitter Gourd ◽  
Physiological Changes ◽  
Post Harvest ◽  
Storage Losses

scholarly journals RESÍDUOS DE 14C-PROCHLORAZ EM MANGAS IRRADIADAS

2001 ◽  
Vol 11 ◽  
Author(s):  
MARIA APARECIDA COSTA ◽  
VALDEMAR LUIZ TORNISIELO ◽  
JULIO MARCOS MELGES WALDER
Keyword(s):  
Gamma Radiation ◽  
Degradation Product ◽  
Radiation Treatment ◽  
Refrigerated Storage ◽  
Post Harvest ◽  
Brazilian Legislation ◽  
Low Levels

O objetivo deste trabalho foi avaliar os níveis residuais de Prochloraz aplicado em mangas, na pré e pós-colheita após o tratamento com radiação. Os frutos foram submetidos à radiação gama na dose de 1,0 kGy visando verificar se a mesma induziu a degradação do fungicida. As mangas tratadas na pós-colheita foram armazenadas por 21 dias a 12 °C. Os resíduos de Prochloraz não apresentaram decréscimo durante o período de carência (21 dias) estabelecido pela Legislação Brasileira de Agrotóxicos. O armazenamento refrigerado (12 °C) e a irradiação gama também não contribuíram para a degradação do fungicida. O Prochloraz ficou retido principalmente na casca (média = 1,64 µg/g), que funcionou como barreira à contaminação da polpa (média = 0,06 µg/g). O produto de degradação, formado nas cascas das mangas tratadas na pós-colheita, foi identificado como sendo o BTS 44596. Os metabólitos, encontrados em níveis baixos, confirmaram a ocorrência de baixa degradação do fungicida em mangas. 14C-PROCHLORAZ RESIDUES IN IRRADIATED MANGOES Abstract The aim of this work was to evaluate the Prochloraz residual levels applied in mangoes, in pre and post-harvest after radiation treatment. The fruits were submitted to gamma radiation with of 1,0 kGy dose, aiming to verify if it induces the fungicide degradation. Treated post-harvest mangoes were stored, at 12 0C during 21 days. Prochloraz residues did not present reduction after safe period (21 days), established by the Brazilian legislation on agrochemicals. The refrigerated storage (12 0C) and the gamma radiation also did not contribute to the degradation of the fungicide. Prochloraz was mainly retained in the peels (mean = 1,64 µg/g) which served as barrier to the pulp (mean = 0,06 µg/g) contamination. The degradation product, formed in peels of post-harvest treated mangoes was the metabolite BTS 44596. The metabolites found in very low levels, confirm that low fungicide degradation occurs in mangoes.

Physicochemical changes in GRAS coated and gamma radiated water chestnut (Trapa bispinosa Roxburg) during ambient storage in different storage structures

2016 ◽  
Author(s):  
Nazia Hussain ◽  
S. S. Shukla ◽  
Brijlata Dubey ◽  
Md. Aziz Ahmed
Keyword(s):  
Weight Loss ◽  
Chemical Composition ◽  
Gamma Radiation ◽  
Liquid Paraffin ◽  
Paraffin Wax ◽  
Appreciable Effect ◽  
Lesser Grain Borer ◽  
Water Chestnut ◽  
Significant Difference

The effects of gamma radiation (control, 0.25kGy, 0.50kGy, 0.75kGy, 1.00kGy) and dip treatment of liquid paraffin wax (12%) on the physico-chemical quality of freshly harvested dried water chestnut (Trapa bispinosa Roxburg), packed in glass jar, tin container and low density polyethylene (250 gauge), and the radiation sensitivity of lesser grain borer in gamma radiated samples was analyzed by inoculation of 15 lesser grain borer pest during a period of 6 months at room temperature. The data on the basis of physical properties revealed that weight loss, damage per cent and number of lesser grain borer was found to be 8.93-14.46, 6-24.5 percent and 2-18 borers. The chemical composition ranged from viz; moisture (9.40-10.10), protein (8.82-8.87), fat (0.90-1.00), carbohydrate (76.83-76.87), total ash (3.15-4.03). The effect of gamma radiation and liquid paraffin wax coating on total sugar, reducing sugar, phenol and acidity, and ascorbic acid were from 5.83-5.88, 1.84-1.87, 0.14-0.16, 0.11-0.12 per cent and 41.66-50.00mg/100g respectively. Statistical analysis reveals significant difference in physical parameters (weight loss and damage percent) however in case of chemical composition, throughout the storage period a marginal changes was observed in 0, 3 and 6 months. Irradiation had no appreciable effect on chemical parameters. The treatment combination W4R4 (12% liquid paraffin wax and 1.00kGy) stored in tin container was found to be the best and can extend shelf life up to 6 month without losing the quality of stored water chestnut.

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