scholarly journals Influence of post harvest processing conditions on yield and quality of ground turmeric (Curcuma longa L.)

2002 ◽  
Vol 45 (4) ◽  
pp. 423-429 ◽  
Author(s):  
Maria Lúcia A. Bambirra ◽  
Roberto G. Junqueira ◽  
Maria Beatriz A. Glória
Keyword(s):  
Moisture Content ◽  
Room Temperature ◽  
Curcuma Longa ◽  
Alkaline Media ◽  
Processing Conditions ◽  
B Values ◽  
Post Harvest ◽  
Yield And Quality ◽  
Polyethylene Bags

Studies were carried out to evaluate the influence of post harvest processing conditions on yield and quality of ground turmeric. Rhizomes were peeled, cooked (autoclave or immersion) in water or alkaline media, sliced, dehydrated, ground, sieved, packaged in polyethylene bags and stored for 60 days at room temperature. Yields ranged from 9.84 to 14.51 g of powder/100 g of rhizome with moisture varying from 8.84 to 9.86 g/100 g. Peel removal caused 30% mass loss but the powder obtained had higher intensity of yellow and red. Cooking caused a reduction in dehydration time and provided a powder with lower moisture content, higher levels of curcuminoid pigments and higher Hunter CIE L*, a* and b* values. Cooking by immersion provided higher quality powder compared to autoclave. Use of alkaline media resulted in a product with lower curcuminoid content, and higher intensity of yellow. There was no change in pigment and colour characteristics during storage.

scholarly journals Impact of post-harvest storage and freezing of palm fruits on the extraction yield and quality of African crude palm oil extracted in the laboratory

OCL ◽  
2020 ◽  
Vol 27 ◽  
pp. 52
Author(s):  
Doris Nanda ◽  
Germain Kansci ◽  
Sylvain Rafflegeau ◽  
Claire Bourlieu ◽  
Georges Ngando Ebongue ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Palm Oil ◽  
Room Temperature ◽  
Storage Time ◽  
Extraction Yield ◽  
Crude Palm Oil ◽  
Post Harvest ◽  
Yield And Quality ◽  
Palm Fruits

In the frame of African artisanal small-scale extraction of palm oil, the effects of post-harvest storage time and freezing of palm fruits on the extraction yield and quality of crude palm oil (CPO) were studied at laboratory scale using a process mimicking artisanal extraction. The extraction yield and free fatty acid (FFA) content of CPO increased with the length of fruit storage time at room temperature and freezing. FFA, total fatty acid and triacylglycerol profiles indicated a lack of specificity of the lipases at work. During post-harvest storage, the carotenoid content of CPO decreased slightly, tocopherols and tocotrienols (tocols) remained steady, while lipid oxidation remained at a very low level. For frozen fruits, carotene and tocol contents decreased sharply as a function of storage time, thought remaining quite high, but decreasing amounts of secondary oxidation products were detected. The FFA content and lipid oxidation level were highly correlated, indicating a pro-oxidant effect of FFAs. To conclude, three days of storage prior to artisanal extraction seemed the best trade-off between extraction yield and CPO quality. Combined storage at room temperature and freezing of palm fruits led to a large range of FFA contents in CPO. Optimization of the FFA contents of artisanal CPOs in line with local consumer’s demand calls for an assessment of their functional properties and sensory perception of foods formulated with CPOs.

scholarly journals Pre-harvest application of salicylic acid influence physicochemical and quality characteristics of ‘Chimarrita’ peaches during cold storage

2019 ◽  
pp. 46
Author(s):  
Jakellinye Miranda ◽  
Suélen Braga de Andrade, Andressa Vighi Schiavon ◽  
Pedro Luis Panisson Kaltbach Lemos ◽  
Cláudia Simone Madruga Lima ◽  
Marcelo Barbosa Malgarim
Keyword(s):  
Salicylic Acid ◽  
Shelf Life ◽  
Cold Storage ◽  
Room Temperature ◽  
Soluble Solids ◽  
Acid Solutions ◽  
Post Harvest ◽  
Hue Angle ◽  
Cold Chamber

Peach is a climacteric highly-perishable fruit whose post-harvest preservation relies largely on cold storage. The combination of the last with other technologies allows to extend the shelf life of this product. One alternative is the utilization of salicylic acid, a natural compound involved in many physiological phenomena such as resistance against diseases and ripening. Considering these facts, the objective of the present work was to evaluate the effect of pre-harvest application of salicylic acid solutions on the quality of ‘Chimarrita’ peaches during post-harvest cold storage. The experiment was conducted at the Federal University of Pelotas/RS, in the campus of Capão do Leão/RS - Brazil. The application of salicylic acid solutions was performed by direct pulverization on the fruits, 30 days prior to harvest. The concentrations were: 0,0 (control); 1,0; 1,5; and 2,0 mM. After harvest, the fruits were stored in a cold chamber at 1,0 ± 0,5°C and 85-90% RH, for 30 days. The analyses were performed at the following cold storage periods (plus 2 days at room temperature of 20°C to all treatments, in order to simulate commercialization conditions): 10 (+2) days; 20 (+2) days; e 30 (+2) days. The variables evaluated were: mass loss (%); flesh firmness (N); DA index; color (L, a*, b* and hue angle); wooliness incidence (%); rot incidence (%); total soluble solids (°Brix); pH; titrable acidity (% of organic acids); and ratio. The salicylic acid doses and/or the cold storage periods had significant effects on all the evaluated parameters. For most of the parameters analyzed, the intermediate dosis of 1mM (and also 1,5mM) of salicilic acid showed the most promising results. Therefore, the application of salicylic acid solutions 30 days prior to harvest is a technique which can be combined to cold storage in order to shift the quality and the shelf-life of ‘Chimarrita’ peaches.

scholarly journals Influence of off-season land management on maximizing yield and quality of Curcuma longa L. cultivars

1970 ◽  
pp. 33-36
Author(s):  
A. ANBURANI
Keyword(s):  
Land Management ◽  
Management Practices ◽  
Curcuma Longa ◽  
Block Design ◽  
Quality Parameters ◽  
Polyethylene Film ◽  
Superior Performance ◽  
Yield And Quality ◽  
Randomized Block Design

The present investigation was carried out to study the effect of off season soil management practices on yield and quality of turmeric (Curcuma longa L.) cultivars. The experiment was laid out in a Factorial Randomized Block Design with ten treatments in three replications consisted of five off-season land management treatments viz., fallow (S1), summer ploughing 2 times (S2), summer ploughing 1 time (S3), solarization with transparent polyethylene film of 0.05 mm thick for 40 days (S4) and black polyethylene film for 40 days (S5). It was tested with two popular cultivars viz., Curcuma longa -1 CL-1 (V1) and Curcuma longa-2 CL-2 (V2), collected from Erode and Chidambaram. Various yield components were recorded at the time of harvest and were analysed. The yield attributing characters viz., number, length, girth and weight of mother, primary and secondary rhizomes were recorded. The treatment where solarization with transparent polyethylene film of 0.05 mm thick was tested recorded the highest yield and yield attributing characters when compared to other treatments. The same treatment also exhibited the highest fresh rhizome yield per plant, curing percentage and cured rhizome yield. The quality parameters like curcumin, oleoresin and essential oil content were also showed superior performance in the treatment where solarization with transparent polyethylene film of 0.05 mm thick was applied.

The Processing Potentials of Yams (Dioscoarea spp.) II. Precooked Drum Dried Flakes-Instant Yams

1969 ◽  
Vol 60 (2) ◽  
pp. 215-223
Author(s):  
W. J. C. Steele ◽  
G. M. Sammy
Keyword(s):  
Moisture Content ◽  
Starch Content ◽  
Critical Factor ◽  
Apparent Effect ◽  
Steam Cooking ◽  
Keeping Quality ◽  
Polyethylene Bags ◽  
Storage Studies

Drum dried yam flakes were prepared from six varieties representing four species. Steam cooking led to lower flesh loss than water cooking. Certain parts of the cooked yams were pigmented. Stickiness of the reconstituted product varied with varieties, indicating that the free starch content (blue value) was not the only factor affecting stickiness; e.g. Lisbon with a blue value of 860 was less sticky than Cush-cush which had a blue value of 286. The effect of maturity on flake quality indicates that immature tubers were unsuitable for flake production, while storage of tubers up to 20 weeks had no apparent effect on flake quality. Storage studies show that there was a greater loss in quality of flakes stored in polyethylene bags than flakes stored in glass jars, with amber-coloured jars showing a slightly better keeping quality than clear jars. Moisture content was a critical factor in keeping quality. D. alata—Lisbon, Coconut and Oriental gave products with high acceptability.

scholarly journals Evaluating the Quality of Maize Grains Stored in a Modified Metallic Silo

2019 ◽  
Vol 3 (Issue 1) ◽  
Author(s):  
O.O Oniya ◽  
A.B Fashina ◽  
K.A Iyalabani ◽  
S.B Amusa
Keyword(s):  
Moisture Content ◽  
Insect Pests ◽  
Storage Systems ◽  
Storage Period ◽  
Market Value ◽  
Main Determinant ◽  
Post Harvest ◽  
Moisture Meter ◽  
The Cost

Maize is known to be an important crop for food security in developing countries; and farmers have continued to experience post-harvest losses which lead to reduction in the quality or quantity of maize grains. The main causes of post-harvest losses are the storage insect, pests, improper drying and poor storage systems. Poor storage accounts for 5-10% loss and 5% loss is attributed to insect attacks. This research modified a one tonne metallic silo with the aim of studying the effects on moisture content and hectolitre weight of the maize grains. The moisture content was determined using moisture meter while the hectolitre weight was determined using extruded brass material. The study lasted for six months and analyses were carried out on the data collected using Duncan multiple range tests at 95% level of confidence. The moisture content was observed to reduce from 13.5% to 11.4% w.b while hectoliter weight which is the main determinant of the market value of the grain was observed to increase from 276 kg/ml to 288 kg/ml, this implies that there was increase in the cost value of the grain after six month of storage. The results showed that variations in moisture content along storage period were significant at (p ≤ 0.05).

scholarly journals Effect of Temperatures and Fillers on Yield and Quality of Turmeric (Curcuma longa L.) During Postharvest Seed Rhizome Storage

2013 ◽  
Vol 21 (5) ◽  
pp. 334-341 ◽  
Author(s):  
Jung Dae Lim ◽  
Eun Hye Kim ◽  
Jae Yeon Yun ◽  
Hae Il Park ◽  
Hun Sub Shim ◽  
...  
Keyword(s):  
Curcuma Longa ◽  
Yield And Quality

scholarly journals EFFECTS OF INITIAL MOISTURE CONTENT ON THE PRODUCTION AND QUALITY PROPERTIES OF SOLID BIOFUEL

2015 ◽  
Vol 55 (5) ◽  
pp. 335 ◽  
Author(s):  
Miloš Matúš ◽  
Peter Križan ◽  
Juraj Beniak ◽  
Ľubomír Šooš
Keyword(s):  
Moisture Content ◽  
Room Temperature ◽  
Initial Moisture Content ◽  
Calorific Value ◽  
Quality Properties ◽  
Moisture Expansion ◽  
Solid Biofuel ◽  
Effect Of Moisture ◽  
Physical Changes

The moisture content of densified biomass is a limit parameter influencing the quality of the solid biofuel. It influences its calorific value, density, mechanical strength and dimensional stability as well as the production process of this biofuel. The paper deals with the experimental research of the effect of moisture content of densified material on the final quality of biofuel in the form of logs. Experiments based on the single-axis densification of spruce sawdust were realized by hydraulic piston press, where the densified logs were produced under room temperature. The effect of moisture content on the quality properties of the logs, including density, change of moisture, expansion and physical changes, were studied. The results show the necessary moisture ranges for producing good-quality logs. The experiments were evaluated and the moisture content of the tested material was optimized to achieve the optimum value for the best quality of the solid biofuel.

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