scholarly journals Application of Shrimp Waste for the Synthesis of Polyurethane–Chitosan Materials with Potential Use in Sorption of Oil Micro-Spills in Water Treatment

2021 ◽  
Vol 13 (9) ◽  
pp. 5098
Author(s):  
Agnieszka Piotrowska-Kirschling ◽  
Katarzyna Szelągowska-Rudzka ◽  
Jakub Karczewski ◽  
Joanna Brzeska
Keyword(s):  
Water Treatment ◽  
Swot Analysis ◽  
Fish Meal ◽  
Sorption Properties ◽  
Innovative Product ◽  
Shrimp Waste ◽  
Physico Chemical ◽  
Preliminary Research ◽  
Seafood Processing ◽  
Potential Use

Shrimp waste is a common waste in seafood processing. It is used as part of the fish meal which is added to feed. Bearing in mind the Green Deal and sustainability development, it was proposed to use northern prawn shells to obtain chitosan (Ch), which could then be used for polyurethane (PUR) modification. In ports, oil micro-spills often flow into the waters of gulfs and, consequently, into the sea. Systematic chemical and petroleum water pollution may pose a threat to flora and fauna. In this study, chitosan, which was obtained from shrimp shells, was used to synthesize polyurethane–chitosan foams (PUR+Ch) with different chitosan concentrations. Selected physico-chemical and sorption properties in relation to oil and water of these materials were determined. It was found that the amount of Ch added to the foam affected its morphology, hardness, density, and thermal and sorption properties. PUR foam with a 1.5% weight of Ch was characterized as having the highest water and oil sorption. The advantages of the tested material as an innovative product with potentially significant proecological values were estimated using strengths–weaknesses–opportunities–threats (SWOT) analysis. The conducted preliminary research made it possible to demonstrate the use of these materials in the processes of water treatment with the mentioned micropollutants.

scholarly journals Resveratrol in Cancer Patients: From Bench to Bedside

2020 ◽  
Vol 21 (8) ◽  
pp. 2945 ◽  
Author(s):  
Massimiliano Berretta ◽  
Alessia Bignucolo ◽  
Raffaele Di Francia ◽  
Francesco Comello ◽  
Gaetano Facchini ◽  
...  
Keyword(s):  
Cancer Patients ◽  
Red Wines ◽  
Red Rice ◽  
Biological Targets ◽  
Physico Chemical ◽  
Pharmacokinetic Properties ◽  
Clinical Models ◽  
Vegetables And Fruits ◽  
Potential Use ◽  
Reactive Molecule

Resveratrol (3,5,4′-trihydroxystilbene) is a natural phytoalexin that accumulates in several vegetables and fruits like nuts, grapes, apples, red fruits, black olives, capers, red rice as well as red wines. Being both an extremely reactive molecule and capable to interact with cytoplasmic and nuclear proteins in human cells, resveratrol has been studied over the years as complementary and alternative medicine (CAM) for the therapy of cancer, metabolic and cardiovascular diseases like myocardial ischemia, myocarditis, cardiac hypertrophy and heart failure. This review will describe the main biological targets, cardiovascular outcomes, physico-chemical and pharmacokinetic properties of resveratrol in preclinical and clinical models implementing its potential use in cancer patients.

scholarly journals ENZYMATIC WASTE WATER TREATMENT

World Science ◽  
2021 ◽  
Author(s):  
Nancey Hafez
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Metal Ions ◽  
Wastewater Treatment Plants ◽  
Waste Water Treatment ◽  
High Energy ◽  
Enzymatic Reactions ◽  
Biological Interactions ◽  
Physico Chemical

Enzymes are biocatalysts provided by cells and are used in most metabolic methods. Most enzymes are consisting of proteins containing tertiary amino acid which bind to co enzyme or metal ions. Enzymes are accelerating biochemical processes by some mechanisms to chemical catalysts e.g metals, metal oxides and metal ions. Enzymes can be very effective under conditions e.g (temperature, atmospheric pressure and PH). Many enzymes have hydrolyzing, oxidizing and reducing characters. Enzymatic reactions always provide less side effects reactions and fewer waste by products. That is why microbial Enzymes can give an effective and environmental safe alternatives as metabolic inorganic chemical catalysts which can be used in all over pharmaceutical industrial processes. Enzymes are used in waste water treatment. Treatment technologies depend on physico-chemical approaches in wastewater treatment plants which require skills, high operation costs (in terms of high energy and chemical demand). Wastewater treatment is operated to protect the quality of limited freshwater resources, which are most times the final discharge points of effluents, and also, to promote the reusability of expended clean water; amounts of hazardous aromatic byproducts are still generated [3, 4]. The observation shows that wastewater treatment plants, though liable to remove microcontaminants such as heavy metals, and to a far lesser extent, aromatic contaminants, were originally structured for the removal of solid wastes, ecofriendly organic matter and eutrophication stimulants from wastewater, thereby reducing eutrophicating pollution loads; the micropollutants may only be moderately affected by the chemical, physical and biological interactions within the treatment plants.

scholarly journals THE EFFECTS OF DIFFERENT IMMERSION METHOD AND TIME ON THE PHYSICO-CHEMICAL CHARACTERISTICS OF SKIPJACK TUNA (Katsuwonus pelamis) FISH MEAL

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Christina Litaay ◽  
Joko Santoso
Keyword(s):  
Sodium Bicarbonate ◽  
Nutritional Value ◽  
Fish Meal ◽  
Fat Content ◽  
Skipjack Tuna ◽  
Immersion Method ◽  
Tuna Fish ◽  
Katsuwonus Pelamis ◽  
Physico Chemical ◽  
The Village

<p>High fat content in a dark fleshed fish can affect on nutritional value because it can lead to odors in fish meal products. Effort Immersion (deffating) is one way to reduce fat content in fish meal products in order to reduce the products from odor. Research on methods and durations of immersion effects were conducted from October to November 2011. This study aimed to determine the best method to get quality materials skipjact tuna fish meal based on methods and durations of immersion.  Fish sampling were taken from the village of Latuhalat, Ambon-Maluku waters. Deffating process used water, 3% acetic acid, and 0.8% sodium bicarbonate. Immersion durations were 2, 4, and 6 hours. Deffating method using 0.8% sodium bicarbonate with 6 hours immersion time exhibited the best quality fish meal with protein content of 82.86% and 1.10% fat content.</p> <p>Keywords: deffating, fish meal, skipjact tuna.</p>

scholarly journals PERFORMANCE AND CARCASS EVALUATION OF BROILER CHICKS FED SHRIMP WASTE MEAL SUPPLEMENTED WITH SYNTHETIC AMINO ACIDS

2021 ◽  
Vol 25 (1) ◽  
pp. 17-21
Author(s):  
A. O. FANIMO ◽  
O. O. ODUGUWA ◽  
Y. O. JIMOH ◽  
A. O. FARONBI
Keyword(s):  
Crude Protein ◽  
Fish Meal ◽  
Liver Weight ◽  
Abdominal Fat ◽  
Feed Consumption ◽  
Broiler Chicks ◽  
Shrimp Waste ◽  
Feeding Trial ◽  
Dietary Crude Protein ◽  
Synthetic Amino Acids

A feeding trial was conducted using 104 one week-old anak broilier chicks to evaluate the replacement value of shrimp waste meal (SWM) for fish meal (FM) in broiler diets. Fish meal contribution to the dietary crude protein of the brioiler dietsat was replaced with SWM 0, 33, 66 and 100% of graded levels. Weight gain and feedconverstion ratio were significantly (P > 0.05) reduced with SWM replacing FM at 100% at both the starter and finisher phases. No significant differences (P >0.05) were observed for feed consumption. mortality increased with an increased levle of SWM in the diet at the starter phase. Liver weight increased (P <0.05) with increased level of SWM significantly (P <0.05) increased the abdominal fat. Result of this present study show that the SWM could partially replace 66% of the crude protein of FM in broiler diets without negatively affecting performance or carcass quality 

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