Comparison of Physicochemical Properties of Gelatins Prepared from Different Fish Skins through Hot Water Extraction at Mild Temperature Condition

2014 ◽  
Vol 887-888 ◽  
pp. 557-561 ◽  
Author(s):  
Yu Jiang ◽  
Jun Yu ◽  
Cheng Chu Liu
Keyword(s):  
Pharmaceutical Industry ◽  
Physicochemical Properties ◽  
Gel Strength ◽  
Hot Water ◽  
Water Extraction ◽  
Hydroxyproline Content ◽  
Hot Water Extraction ◽  
Physiochemical Properties ◽  
Mild Temperature

Gelatins were prepared from tilapia, salmon and halibut skin through hot water extraction (60°C, 180 min) and their physiochemical properties were compared with commercial gelatins from porcine and bovine sources. Tilapia gelatin contained highest hydroxyproline content (8.45%) and had highest gel strength (376.6 g), followed by salmon gelatin. Halibut gelatin had the lowest hydroxyproline content (24.72% in average) and gel strength (47.56 g in average). Gelatin prepared from tilapia had much higher gel strength and viscosity than commercial pharmaceutical gelatins of porcine and bovine sources and showed a great potential to be utilized in pharmaceutical industry.

scholarly journals Effect of hydrochloric acid extraction on yield and gel properties of gelatine from salted jellyfish by-products

2021 ◽  
Vol 302 ◽  
pp. 02009
Author(s):  
Wiriya Charoenchokpanich ◽  
Pratchaya Muangrod ◽  
Vilai Rungsardthong ◽  
Savitri Vatanyoopaisarn ◽  
Benjamaporn Wonganu ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Gel Strength ◽  
Hot Water ◽  
Water Extraction ◽  
Food Ingredient ◽  
Gel Properties ◽  
Hot Water Extraction ◽  
Pre Treatment ◽  
Hcl Concentration ◽  
By Products

Salted jellyfish by-products have collagen protein that is mainly sold for animal feed at a low price. The change of jellyfish by-products into a food ingredient like gelatine could benefit food applications and reduce food waste. Indeed, jellyfish gelatine production is a time-consuming process that includes alkaline pre-treatment, acid pre-treatment, hot water extraction, and drying. Reduced times of acid pre-treatment and water extraction might deliver different gel properties. Therefore, this research aimed to investigate the effect of hydrochloric acid (HCl) pre-treatment on the gel quality of resultant gelatine. Desalted jellyfish by-products were immersed in 0.5 M sodium hydroxide at 4oC for 1 h and then were acidtreated by varying HCl concentrations (0.1, 0.2, and 0.3 M) at 25oC for 2 h. After that, samples were extracted at 60oC for 3 h and dried at 60oC for 3 days. Results showed that gelatine yield significantly increased with increasing HCl concentration. Gelatine yield were 2.97±0.97%, 5.60±1.01%, and 6.34±1.08%, after extraction with 0.1, 0.2, and 0.3 M HCl, respectively. Gel strength generally decreased as HCl concentration increased. Gel strength values were in the range of 118.89-223.60 g. The colour of jellyfish gelatine showed light to dark brown with no differences in Hue values. Thus, the short duration of HCl pre-treatment for 2 h and hot water extraction for 3 h was insufficient for the jellyfish gelatine process.

Effect of Ultrasonic Wave on Lentinan Extraction

2011 ◽  
Vol 291-294 ◽  
pp. 1339-1343
Author(s):  
Wen Bo Zhang ◽  
Hong Rui Li ◽  
Jun Tao ◽  
Bing Bing Dong
Keyword(s):  
Extraction Efficiency ◽  
Hot Water ◽  
Water Extraction ◽  
Extraction Technique ◽  
Orthogonal Experimental Design ◽  
Extraction Temperature ◽  
Lentinus Edodes ◽  
Extraction Condition ◽  
Hot Water Extraction ◽  
Extraction Parameters

The research in this paper optimized the extraction technique of lentinan with ultrasonic assistant method on the basis of hot water extraction technique, and investigated the promoting function of ultrasound to polysaccharides extraction. Extraction condition was selected by means of orthogonal experimental design, four factors and three levels L9(34), after key elements were respectively chosen through single factor experiments. Comparison between optimal extraction parameters of two method, hot water extraction technique and ultrasonic assistant extraction technique, showed decreased extraction temperature and significantly shortened extraction time, which existed in the second means, improved the extraction efficiency. Lentinus edodes polysaccharide extracted with ultrasonic assistant technique, the extraction rate and polysaccharide content percentage increased 6.22% and 8.66% respectively, comparative to which extracted with hot water extraction technique.

scholarly journals Optimization of the extraction of galactoglucomannans from Pinus halepensis

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Nacera Benouadah ◽  
Andrey Pranovich ◽  
Djamel Aliouche ◽  
Jalel Labidi ◽  
Stefan Willför
Keyword(s):  
High Performance ◽  
Pinus Halepensis ◽  
Hot Water ◽  
Water Extraction ◽  
Chemical Degradation ◽  
Extraction Time ◽  
Size Exclusion ◽  
Hot Water Extraction ◽  
Extraction Processes ◽  
Extraction Parameters

AbstractThe effectiveness of pressurized hot-water extraction conditions for obtaining galactoglucomannans (GGMs) from Pinus halepensis suitable for applications like coatings and films packaging was investigated. For this purpose, high molar masses with high yields are required, presenting a serious challenge for hot-water extraction processes. The extraction of GGMs was carried out in an accelerated solvent extractor (ASE) and the isolation was performed by precipitation in ethanol. Three temperatures in the range 160–180 °C and five extraction times 5–90 min were tested in order to optimize extraction parameters of GGMs, avoiding thermal and chemical degradation in hot-water. Total dissolved solids (TDS) were determined gravimetrically after freeze-drying and weight average molar masses (Mw) were determined by high-performance size exclusion chromatography (HPSEC). Total non-cellulosic carbohydrates were determined by gas chromatography (GC) after acid methanolysis. Free monomers were additionally analyzed by GC. Lignin in water extracts was measured by an ultraviolet (UV) method. Acetic acid was determined after alkaline hydrolysis of acetyl groups and analyzed by HPSEC. The main parameters influencing the extraction processes of the GGMs, namely, extraction time and temperature were studied. Optimal extraction parameters of GGMs were identified at 170 °C and 20 min extraction time, with average Mw of extracted fraction of 7 kDa leading to a GGM yield of approximately 56 ${\text{mgg}}_{\text{o}.\text{d}.\text{m}}^{-1}$, corresponding to 6% on dry wood basis.

Extraction of carboxylic acid-containing diterpenoids from Dodonaea viscosa via pressurised hot water extraction

Fitoterapia ◽  
2018 ◽  
Vol 126 ◽  
pp. 65-68 ◽  
Author(s):  
Bianca J. Deans ◽  
Wesley J. Olivier ◽  
David Girbino ◽  
Alex C. Bissember ◽  
Jason A. Smith
Keyword(s):  
Carboxylic Acid ◽  
Hot Water ◽  
Water Extraction ◽  
Dodonaea Viscosa ◽  
Hot Water Extraction

Hydrothermal pretreatment of wood by mild steam explosion and hot water extraction

2017 ◽  
Vol 241 ◽  
pp. 120-126 ◽  
Author(s):  
Joanna Wojtasz-Mucha ◽  
Merima Hasani ◽  
Hans Theliander
Keyword(s):  
Steam Explosion ◽  
Hydrothermal Pretreatment ◽  
Hot Water ◽  
Water Extraction ◽  
Hot Water Extraction
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