scholarly journals Control of pink discoloration in coconut water

CORD ◽  
2007 ◽  
Vol 23 (2) ◽  
pp. 16
Author(s):  
D. B. Masa
Keyword(s):  
High Temperature ◽  
Metal Contamination ◽  
Copper Concentration ◽  
Coconut Water ◽  
Optimum Conditions ◽  
Food Grade ◽  
Enzymatic Action ◽  
Processing And Storage ◽  
And Storage ◽  
Pink Discoloration

The pink discoloration in coconut water is a result of the initial enzymatic action of polyphenol oxidase (PPO) on the phenolic substrates which are naturally present in the product. Activity of the enzyme is further enhanced by metal contamination such as copper and exposure of the product to high temperature during its processing and storage. The optimum copper concentration to initiate pinking in coconut water was established at 3.96 x 10-04 mM. The PPO level was also shown to vary among coconut varieties and ages. When subjected to optimum conditions for enzymatic activity, the water from younger nuts (7-8 months old) went pink while mature nuts (9-10 months old) showed no discoloration. Application of food-grade resins to remove the phenolic substrates in coconut water was deemed as a possible solution to prevent the discoloration. Further testing in this area needs to be done. 

Evaluation of Freeze-Drying, Pasteurization, High-Temperature Heating and Storage on Selected Enzymes, B-Vitamins and Lipids of Mature Human Milk

1983 ◽  
Vol 46 (4) ◽  
pp. 330-334 ◽  
Author(s):  
B. A. FRIEND ◽  
K. M. SHAHANI ◽  
C. A. LONG ◽  
E. N. AGEL
Keyword(s):  
High Temperature ◽  
Human Milk ◽  
Freeze Drying ◽  
Pantothenic Acid ◽  
B Vitamins ◽  
C Storage ◽  
Processing And Storage ◽  
And Storage ◽  
Temperature Heating ◽  
High Temperature Heating

The effects of freeze-drying, pasteurization, high-temperature heating and storage on key enzymes, B-vitamins and lipids of pooled mature human milk were determined. Freeze-drying significantly decreased (P<0.05) the activity of lactoperoxidase and lysozyme but had no effect on the lipase or protease of pooled human milk. Storage after freeze-drying destroyed lactoperoxidase activity but had no apparent effect on the other enzymes. Heating at 62.5°C for 30 min or 75°C for 15 min significantly decreased (P<0.05) the activities of lactoperoxidase, lipase and protease. Lysozyme was inactivated significantly only by heating at 75°C. Storage at −25°C following pasteurization had no significant effect on enzyme activity. Biotin, niacin and pantothenic acid appeared to be quite stable and were not significantly altered by freeze-drying, heating and/or storage. Similarly, there were no significant differences in lipid components following processing and storage.

Transcript-Level Analysis in Combination with Real-Time PCR Elucidates Heat Adaptation Mechanism of Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) Larvae

2019 ◽  
Vol 112 (6) ◽  
pp. 2984-2992
Author(s):  
Jianhua Lü ◽  
Mingfei Huo ◽  
Yulong Kang
Keyword(s):  
High Temperature ◽  
Tribolium Castaneum ◽  
Real Time Pcr ◽  
Food Processing ◽  
Transcript Level ◽  
Adaptation Mechanism ◽  
Heat Adaptation ◽  
Processing And Storage ◽  
And Storage ◽  
Level Analysis

Abstract Tribolium castaneum (Herbst) ranks as one of the most prevalent insects in food processing and storage facilities worldwide. Heat treatment has been revisited to disinfest food processing and storage facilities due to increasingly strict regulation on chemicals. The effect of acclimation of T. castaneum larvae to sublethal high temperatures of 36 and 42℃ for 10 h on their heat adaptation was investigated, and transcript-level analysis combinating with real-time PCR (RT–qPCR) was applied for elucidating the heat adaptation mechanism of T. castaneum larvae. Short-term sublethal high temperature acclimation could greatly enhance the thermal adaptability in T. castaneum larvae. In total, 575, 875, and 1017 differentially expressed genes (DEGs) were, respectively, determined in comparisons between the 28 and 36℃ treatments, the 28 and 42℃ treatments, and the 36 and 42℃ treatments. Fifty-three and 96 genes were commonly up- and down-regulated in both the 36 and 42℃ treatments relative to 28℃, respectively. The results of RT-qPCR analysis further confirmed the RNA-seq analysis. The current results are in favor of enhancing the insecticidal effectiveness of extreme high temperature treatment and elucidating the heat adaptation mechanism in T. castaneum larvae.

HUBUNGAN HIGIENE SANITASI DENGAN KANDUNGAN ESCHERICHIA COLI PADA ES BATU INDUSTRI RUMAH TANGGA DI TEPI JALAN WAHID HASYIM 2 KECAMATAN SEMPAJA KOTA SAMARINDA TAHUN 2015

2018 ◽  
Vol 2 (1) ◽  
pp. 43
Author(s):  
Suwignyo Suwignyo ◽  
Abdul Rachim ◽  
Arizal Sapitri
Keyword(s):  
Escherichia Coli ◽  
Data Analysis ◽  
Random Sampling ◽  
Preliminary Test ◽  
Raw Material ◽  
Almost Everywhere ◽  
Ice Cube ◽  
Processing And Storage ◽  
And Storage ◽  
Cluster Random Sampling

Ice is a water that cooled below 0 °C and used for complement in drink. Ice can be found almost everywhere, including in the Wahid Hasyim Sempaja Roadside. From the preliminary test, obtained 5 samples ice cube were contaminated by Escherichia coli. The purpose of this study was to determine relationship between hygiene and sanitation with presence of Eschericia coli in ice cube of home industry at Wahid Hasyim Roadside Samarinda. This research used quantitative with survey methode. The population in this study was all of the seller in 2nd Wahid Hasyim Roadside. Sample was taken by Krejcie and Morgan so the there were 44 samples and used Cluster Random Sampling. The instruments are questionnaries, observation and laboratory test. Data analysis was carried out univariate and bivariate (using Fisher test p= 0.05). The conclusion of this study there are a relation between chosing raw material (p=0,03) and saving raw material (p=0,03) with presence of Eschericia coli. There was no relation between processing raw material into ice cube with presence of Eschericia coli (p=0,15).Advice that can be given to ice cube should maintain hygiene and sanitation of the selection, processing and storage of ice cube.

Prospects for the development of agrarian production systems in in the Right Bank Polesie of Ukraine

2018 ◽  
Vol 2 (95) ◽  
pp. 69-72
Author(s):  
Yu.A. Tarariko ◽  
L.V. Datsko ◽  
M.O. Datsko
Keyword(s):  
Agricultural Production ◽  
Production Systems ◽  
Economic Feasibility ◽  
Capital Investments ◽  
Resource Potential ◽  
Grain Processing ◽  
Processing And Storage ◽  
The Right ◽  
And Storage ◽  
Agricultural Production Systems

The aim of the work is to assess the existing and prospective models for the development of agricultural production in Central Polesie on the basis of economic feasibility and ecological balance. The evaluation of promising agricultural production systems was carried out with the help of simulation modeling of various infrastructure options at the levels of crop and multisectoral specialization of agroecosystems. The agro-resource potential of Central Polesie is better implemented in the rotation with lupine, corn and flax dolguntsem with well-developed infrastructure, including crop, livestock units, grain processing and storage systems, feed, finished products and waste processing in the bioenergetic station. The expected income for the formation of such an infrastructure is almost 8 thousand dollars. / with a payback period of capital investments of 2-3 years.

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