scholarly journals Novel practice to produce safe and healthy dry fish using irradiated chitosan coating

Food Research ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 240-247
Author(s):  
M.L. Rahman ◽  
R. Barua ◽  
A.A. Jubayer ◽  
J.M.M. Islam ◽  
A.H.M. Kamal ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Human Health ◽  
Nutritional Value ◽  
Microbial Contamination ◽  
Cost Effective ◽  
Chitosan Solution ◽  
Drying Process ◽  
Open Environment ◽  
Chitosan Coating

In Bangladesh, dry fishes are mostly produced by drying in an open environment under sunlight, and so the producers are forced to use insecticides and fungicides to prevent microbial and blowfly infestation. That is why dry fishes are often contaminated with residual insecticides and fungicides, which cause a severe threat to human health. In this experiment, gamma radiation treated chitosan solution was used while drying the fishes, and the effect was evaluated. Experimental results suggested that chitosan coating did not hinder the drying process but improved the quality of the produces. Chitosan coating was found as a repellant of blowflies as well. Besides, it also prevented microbial contamination. The nutritional value of the produced dry fishes was examined and found very satisfactory. Overall results suggested that the application of irradiated chitosan can be a very suitable and cost-effective way to produce safe and healthy dry fishes.

scholarly journals Insights into dog owner perspectives on risks, benefits, and nutritional value of raw diets compared to commercial cooked diets

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10383
Author(s):  
Alysia Empert-Gallegos ◽  
Sally Hill ◽  
Philippa S. Yam
Keyword(s):  
Human Health ◽  
Nutritional Value ◽  
Microbial Contamination ◽  
Animal Health ◽  
Nutrition Risk ◽  
Raw Meat ◽  
Diverse Backgrounds ◽  
The World ◽  
Dog Owners ◽  
Repeated Words

Background The practice of feeding a raw meat-based diet (RMBD) to dogs is a topic of increasing interest to owners and veterinary professionals alike. Despite the research around the practice, particularly about the risk of nutritional imbalances and microbial contamination, an increasing number of dog owners are adopting a raw diet for their dogs. This study expands the research into owner motivations for feeding RMBDs and cooked diets and asks them their opinions about risk and nutritional value. Methods An anonymized, online, internationally accessible questionnaire was developed to ascertain owner perspectives on the risks, benefits, and nutritional value of commercially prepared and homemade RMBDs as compared with commercially prepared cooked diets (CCDs). Results The questionnaire was completed by 419 dog owners of diverse backgrounds across the world. Of the participants, 25.3% fed RMBDs. Just over 70.0% of all participants had spoken to their veterinarian about their dog’s nutrition. Owners who fed RMBDs ranked their veterinarian’s knowledge lower and their own knowledge of canine nutrition higher than owners who fed CCDs. They rated commercial and homemade RMBDs as highly nutritious 83.5% and 73.6% of the time, respectively, while only 12.5% rated CCDs as highly nutritious. Owners who fed CCDs ranked RMBDs as highly nutritious less often, but also only ranked CCDs as highly nutritious 52.7% of the time. All participants agreed that CCDs were low risk to human health. Owners who fed RMBDs ranked raw diets as highly risky to human or dog health under 20.0% of the time but deemed CCDs risky to animal health over 65.0% of the time. When asked about benefits of raw diets, the most repeated words offered by owners were “health”, “better”, “coat” and “teeth”. The most repeated risks presented were “bacteria”, “nutrition”, “risk” and “Salmonella”. Owners who fed RMBDs tended to use vague terminology like “health” and “better” when asked why they fed a raw diet. Owners who did not feed RMBDs used more specific terminology like “expensive”, “time” and “risk” when asked why they did not feed a raw diet. Overall, the two groups differed in their perceptions around RMBD and CCD feeding, which highlights the need for a better line of communication and education between veterinarians and owners.

scholarly journals Quality and Drying Kinetics of Moringa (Moringa oleifera Lam.) Seed Flour After Drying Process

2020 ◽  
Vol 8 (2) ◽  
pp. 380
Author(s):  
Francisco Marto De Souza ◽  
Emmanuel Moreira Pereira ◽  
Jackson Silva Nóbrega ◽  
Rosilene Agra Da Silva ◽  
Adriana Da Silva Santos ◽  
...  
Keyword(s):  
Nutritional Value ◽  
Drying Process ◽  
Constant Weight ◽  
Seed Flour ◽  
Peleg Model ◽  
Different Temperatures ◽  
Kinetics Of ◽  
Best Fit ◽  
Moringa Oleifera Lam

The moringa presents great nutritional value thanks to its bioactive compounds, providing many benefits to human health. Therefore, this plant has been studied with the aim of being used as a food fortifier. The objective of this work was to describe the technological process in the production of moringa seed flour at different temperatures through numerical and analytical solutions and assess its final chemical quality. Moringa pods were obtained in experimental area and were treated by removing their seeds. A drying process was performed at different temperatures (40, 50, 60 °C) with progressive weighing on a semi-analytical scale until constant weight which was obtained after 2 hours of drying. The flour was obtained with the use of a knife mill. Empirical models of Lewis, Herdenson and Pabis, Peleg and Page were used to describe the dehydration curve of moringa seeds. Protein, lipid, carbohydrate, ash and moisture contents were determined in the flours obtained at different temperatures. We verified that best fit model was Page’s, representing the best coefficients of determination and chi-squares. The Peleg model showed incoherent behavior, indicating that it is not ideal for simulating the drying process of moringa seeds at the studied temperatures. The temperature influenced the quality of the flour. The flour obtained at a temperature of 40 °C showed the best percentages of protein, ash, moisture and carbohydrates. For the lipid content, the best flour results was obtained at temperatures of 50 and 60 °C.

Quality and Shelf Life of Mango (Mangifera Indica L. cv. `Tainong') Coated by Using Chitosan and Polyphenols

2007 ◽  
Vol 13 (4) ◽  
pp. 317-322 ◽  
Author(s):  
J. Wang ◽  
B. Wang ◽  
W. Jiang ◽  
Y. Zhao
Keyword(s):  
Shelf Life ◽  
Sensory Quality ◽  
Mangifera Indica ◽  
Titratable Acidity ◽  
Chitosan Solution ◽  
Life Extension ◽  
Mango Fruit ◽  
Chitosan Coating ◽  
Keeping Quality

Chitosan-based coatings were used to delay ripening and prolong shelf-life of mango fruit stored at 15±1°C and 85—90% RH for 35 days. Mango fruits were treated with 2% chitosan solution or with 2% chitosan containing 1% tea polyphenols (TP—chitosan). Samples were taken at regular intervals for analysis. Results indicated that chitosan coating alone could decrease the decay incidence and weight loss, and delay the change in colour, pH and titratable acidity of mango fruit during storage. While coating the fruit with TP—chitosan was more effective at keeping quality of the fruit during storage. Firmness of the control fruit declined rapidly to 18.6 N after 5 days of storage at 15°C, which was 22.8% or 71.5% lower than that of the fruit treated with chitosan or TP—chitosan, respectively. Sensory quality of mango was enhanced significantly by the TP—chitosan coating compared with chitosan coating alone. These results suggested that treatment with chitosan containing TP exhibited high potential for shelf-life extension of mango fruit.

scholarly journals Analysis of chitosan treatment on white and black sweet cherry

2020 ◽  
Author(s):  
Gabor Zsivanovits ◽  
Dida Iserliyska ◽  
Maria Momchilova ◽  
Petya Sabeva ◽  
Zarya Rankova
Keyword(s):  
Weight Loss ◽  
Nutritional Value ◽  
Microbial Contamination ◽  
Sweet Cherry ◽  
Edible Coating ◽  
Chitosan Coating ◽  
Confectionery Products ◽  
Number Of Microorganisms ◽  
Sweet Cherry Cultivars ◽  
Microbiological Properties

AbstractBicolor (Rosaline) and black (Regina) sweet cherry cultivars were treated with chitosan-Ca-lactate and chitosan-alginate solutions. The chitosan coating is biocompatible, nontoxic and possesses antimicrobial activity. The sample series (five replicates of thirty pieces from each variety and each treatment, and a control) were refrigerated at 4 °C for 21 and 28 d, to the end of shelf-life. Physical (visual sorting, weight loss and texture of intact fruit), physicochemical (TSS, antioxidant activity, and pH of the pulp), and microbiological properties (total number of microorganisms, Escherichia coli, fungi and yeasts) were investigated weekly. For the last week only the Regina cultivar had acceptable appearance, the other cultivar was discarded after 21 d. The chitosan-alginate treatment preserved the texture, showed smaller weight loss, higher antioxidant preservation and smaller microbial contamination than the samples with chitosan-Ca-lactate on both cultivars. Based on the results, the edible coating can help to preserve the nutritional value of fresh fruit and this technology can be useful in preparing the ready-to-eat fruit salads or in decoration of confectionery products.

scholarly journals Pengaruh Pelapisan Kitosan-Nisin terhadap Kualitas Ikan Sidat (Anguilla bicolor bicolor) selama Masa Penyimpanan pada Suhu Rendah

2019 ◽  
Vol 15 (2) ◽  
pp. 251
Author(s):  
Triana Kusumaningsih ◽  
Tri Martini ◽  
Tika Diah Utami
Keyword(s):  
Low Temperatures ◽  
Microbial Contamination ◽  
Ph Value ◽  
Storage Period ◽  
Chitosan Solution ◽  
Sem Analysis ◽  
Lower Amount ◽  
Plate Count ◽  
Physical Changes

<p>Telah dilakukan penelitian mengenai preparasi dan karakterisasi pelapisan kitosan nisin terhadap kualitas ikan sidat (<em>A</em><em>nguilla bicolor bicolor</em>) selama penyimpanan pada suhu rendah. Penyimpanan dilakukan selama 8 hari pada suhu 5 ± 2 °C. Nisin sebanyak (0, 2, 4, 6 dan 8 g) ditambahkan ke dalam larutan kitosan 1% (b/v), sehingga diperoleh lima larutan pelapis, yaitu kitosan 1,0% dan kitosan-nisin: 0,2; 0,4; 0,6 dan 0,8% (b/v). Pelapis kitosan-nisin optimal diketahui melalui pengamatan terhadap perubahan fisik daging. Tebal lapisan kitosan-nisin diamati menggunakan analisis SEM. Parameter yang diukur selama penyimpanan adalah nilai pH, nilai jumlah cemaran mikroba dengan metode <em>T</em><em>otal Plate Count</em> (TPC), kadar air, kadar lemak dan kadar protein. Hasil penelitian menunjukkan bahwa berdasarkan perubahan fisik selama penyimpanan, konsentrasi kitosan-nisin sebesar 0,6% (b/v) merupakan konsentrasi optimal untuk mempertahankan kualitas ikan sidat. Tebal lapisan kitosan-nissin adalah (0,529 − 0,554) mm. Ikan sidat terlapis kitosan-nisin mengalami penurunan kadar proksimat (air, lemak dan protein), peningkatan nilai pH dan jumlah cemaran mikroba yang lebih rendah dibandingkan ikan tanpa pelapisan. Hal tersebut menunjukkan bahwa pelapisan kitosan-nisin pada ikan sidat dapat mempertahankan kualitas ikan sidat selama penyimpanan pada suhu rendah.</p><p><strong>Effect of Chitosan-Nisin Coating on Quality of Eel (<em>Anguilla bicolor bicolor</em>) during the Storage Period at Low Temperature.</strong> The research of the preparation and characterization of chitosan-nisin as a coating layer on the eel (<em>A</em><em>nguilla bicolor bicolor</em>) were studied. The quality of the eels after coating was observed during storage at low temperatures. The storage was carried out for 8 days at a temperature of 5 ± 2 °C. A various mass of nisin as much as (0, 2, 4, 6 dan 8 g) was added to 1% (b/v) chitosan solution, thus five coating solutions were obtained, namely 1.0% chitosan and chitosan-nissin 0,2; 0,4; 0,6 and 0,8% (w/v), respectively. The optimalization of chitosan-nisin coating was known through the observation of the physical changes of meat. The thickness of chitosan-nisin layer was observed using scanning electron microscopy (SEM) analysis. The parameters measured during storage are pH value, the amount of microbial contamination using the total plate count (TPC) method, water content, fat content and protein content. The results showed that based on the physical changes during storage, the concentration of chitosan-nisin of 0.6% (w/v) was the optimal concentration to maintain the quality of eel. The thickness of the chitosan-nissin layer was observed of 0.529 – 0.554 mm. Chitosan-nisin coated eel decreased proximate levels (water, fat and protein), increased pH value and lower amount of microbial contamination compared to fish without coating. These phenomena show that the chitosan-nisin coating can maintain the quality of eel during storage at low temperatures.</p>

Compound parabolic collector solar disinfection system for the treatment of harvested rainwater

2018 ◽  
Vol 4 (7) ◽  
pp. 976-991 ◽  
Author(s):  
André Strauss ◽  
Brandon Reyneke ◽  
Monique Waso ◽  
Wesaal Khan
Keyword(s):  
Microbial Contamination ◽  
Cost Effective ◽  
Microbial Quality ◽  
Water Infrastructure ◽  
First Flush ◽  
Solar Disinfection ◽  
Point Of Use ◽  
Filtration Step ◽  
Parabolic Collector

Cost-effective SODIS-CPC systems significantly improved the microbial quality of harvested rainwater. These point-of-use treatment systems can be implemented on site where standard water infrastructure cannot be employed. The use of a first flush diverter as a pre-filtration step also reduced microbial contamination.

Gamma Radiation Treated Chitosan Solution for Strawberry Preservation: Physico-Chemical Properties and Sensory Evaluation

2016 ◽  
Vol 60 ◽  
pp. 30-37 ◽  
Author(s):  
Sakila Jesmin ◽  
Abdullah Al-Jubayer ◽  
Saad bin Eusuf ◽  
A.H.M. Kamal ◽  
Jahid M.M. Islam ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Shelf Life ◽  
Chemical Properties ◽  
Ascorbic Acid Content ◽  
Chitosan Solution ◽  
Cell Wall Degrading Enzymes ◽  
Physico Chemical ◽  
Positive Effect ◽  
Control Samples

The research was designed to extend shelf life of stored strawberry by bioactive chitosan coating. Strawberry fruits were dipped for 2 min in different concentration of irradiated chitosan (300, 500, 1000 and 1500 ppm) solution which were subjected to different gamma radiation doses (30, 40, 50 and 60 kGy) while uncoated fruits were served as control. Samples were packed in zip bags and stored in 4°C and kept for observation. Fruits treated with 50 kGy irradiated chitosan at 1500 ppm concentration showed significant delays in the change of weight loss, decay percentage, pH, and ascorbic acid content as compared with the uncoated control fruits. Samples stored in 4°C and packed in zip bags showed an increased shelf life up to 21 days whereas control samples with same condition could maintain edible quality only up to 3 days. Compared to the controls, all coating formulations had positive effect on the inhibition of cell wall degrading enzymes. These findings suggest that the use of irradiated chitosan coatings can be very useful for extending the shelf-life and maintaining quality of strawberry fruit.

Microbiological quality of street vended Panipuri in Jagtial district of Telangana, India

2021 ◽  
Author(s):  
Venkatesh Teegala ◽  
Kanakamedala Bipin Chandra Pavan ◽  
Anumolu Vijaya Kumar
Keyword(s):  
Staphylococcus Aureus ◽  
Human Health ◽  
Urban Areas ◽  
Microbiological Quality ◽  
Cost Effective ◽  
Total Coliform ◽  
Plate Count ◽  
Standard Plate Count ◽  
The People

Street vended foods have gained a lot of popularity in recent days owing to their appealing taste and flavour. These foods apart from the taste and flavour, have been cost-effective and easily available for all people. That has been the reason for such high demand for these foods in all walks of life and are being relished by the populations from the rural to urban areas. Street foods have been satisfying the hunger of a good percentage of people at an affordable cost. On the other side of the situation, these foods have been posing a good risk of health problems for the people because of the unhygienic methods and process of preparation of these foods by the mostly illiterate community of businessmen who have been preparing them. Hence the need of evaluating these foods for the contamination levels and risk factors for human health have been exponentially felt and the present study was taken up. Therefore, the present study was carried out to check the microbiological quality of street vended panipuri sold in Korutla, Metpally, and Jagtial towns of Jagtial Dist, Telangana state. A total of ninety-six samples viz., water, dall and kachori (thirty two each) were aseptically collected from various vendors and were subjected for standard plate count, total Coliform count, total Salmonella count and total Staphylococcus aureus count. Results revealed that 74% of samples had high loads of bacterial pathogens such as Escherichia coli (41%), Staphylococcus aureus (31%), sp. (20%), Pseudomonas sp. (5%) and yeast (3%). Hence, it has been enumerated that the quality of street foods must be monitored, and standards of the microbiological load have to be followed for human health safety.

Production and Nutritional Quality of Traditional Indian Millet Mixture of Rice, Pearl Millet and Urad Dal

2020 ◽  
Vol 11 (4) ◽  
pp. 5076-5081
Author(s):  
Caroline Jeba R ◽  
Priyanka S ◽  
Priyanka M
Keyword(s):  
Nutritional Value ◽  
Microbial Contamination ◽  
Normal Sample ◽  
Traditional Values ◽  
Nutritional Content ◽  
Microbial Analysis ◽  
Cost Efficient ◽  
The Cost ◽  
Powdered Form

Millet mix was prepared for its traditional values. The prepared sample was analyzed for its chemical and nutritional value, and by using the cost-efficient method, the nutritional content of the final product was enhanced. The improved sample was checked for its nutritional content. The objective is to make a comparison between standard and enhanced samples. ingredients were prepared in a powdered form of a sample in four different ratios. The standardized ratio of the ingredients used to make the samples were found by using tests. In the standardized ratio normal (S1) and nutrition enhanced (S2) samples were prepared using the three ingredients. For nutrition enhancement, the method of sprouting was used. Various tests were conducted for the standardized sample to verify its nutritional content, commercializing ability, microbial analysis, analysis etc. The nutritional content Analysis of the normal and nutrition enhanced samples (S1) and (S2) was done. The sample (S2) was nutritionally rich when compared to the normal sample (S1). All other test had more or less coinciding results for both the samples (S1) and (S2). By comparing the nutritional content, a conclusion arrives that the sample (S2is nutritionally rich when compared to (S1). Microbial and Physical properties results show that the product is efficient to be commercialized and stored to a specific period without microbial contamination in powdered form. The nutrient-rich mass is suitable for all age group.

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