scholarly journals Functional Properties of Yellowfin Tuna (Thunnus albacares) Skin Collagen Hydrolysate Fraction obtained by Ultrafiltration Purification

2021 ◽  
Vol 9 (3) ◽  
pp. 841-854
Author(s):  
Binh Cong Nguyen ◽  
Hong Minh Xuan Nguyen ◽  
Kha Hoang Nam Nguyen ◽  
Tuyen Chan Kha
Keyword(s):  
Functional Properties ◽  
Yellowfin Tuna ◽  
Nitrogen Recovery ◽  
Recovery Efficiency ◽  
Hydrolyzed Collagen ◽  
Nitrogen Recovery Efficiency ◽  
Membrane Flux ◽  
Degree Of Separation ◽  
Pharmaceutical Industries ◽  
Better Than

Hydrolyzed collagen with different fractions is broadly applied in various industries due to its functional properties. The study aimed to purify and fractionate the hydrolyzed collagen from yellowfin tuna skin by ultrafiltration and evaluate the functional properties of its fractions. The effect of temperature, pH, and pressure on membrane flux, nitrogen recovery efficiency, and degree of separation was investigated. Afterward, several functional properties of hydrolyzed collagen fractions including solubility, emulsification, foaming, and antioxidant properties were evaluated. The optimum ultrafiltration conditions for hydrolyzed collagen were temperature 25 °C, pH 6.5 and pressure 12 psi provided optimum membrane flux (3.4 L/m2.h) and nitrogen recovery efficiency (80.81%), and the smallest degree of separation (27.45%). The products after ultrafiltration were separated into two fractions, F1 (< 3 kDa), and F2 (3-5 kDa), with the volume of 10% and 90%, respectively. Both hydrolyzed collagen fractions were more than 96% soluble at pH below 8.0, where the F2 fraction dissolved better than F1. As pH was higher than 8.0, both fractions were almost completely dissolved. In addition, the emulsifying and foaming abilities of the F1 fraction were better than the F2. However, the F2 fraction was more resistant to oxidation with higher antioxidant activity. In conclusion, this research indicates that different fractions from hydrolyzed collagen from yellowfin tuna skin have various functional properties that could be applied in food, cosmetic and pharmaceutical industries.

scholarly journals Plant Growth and Cutting Production of Container-grown Pelargonium Stock Plants as Affected by N Concentration and N Form

1992 ◽  
Vol 117 (2) ◽  
pp. 234-238 ◽  
Author(s):  
Ruth Ganmore-Neumann ◽  
A. Hagiladi
Keyword(s):  
Plant Growth ◽  
N Uptake ◽  
Nitrogen Recovery ◽  
Recovery Efficiency ◽  
Pelargonium Zonale ◽  
Minimum Concentration ◽  
Nitrogen Recovery Efficiency ◽  
N Concentration ◽  
Mother Plants ◽  
Cutting Production

Stock plants of Pelargonium zonale `Empress' were grown for 130 days on coarse tuff medium in a greenhouse. Four N concentrations (50, 100,200, and 400 mg N/liter) and three NO3-: NH4+: ratios (70:30, 60:40, and 40:60) were applied. The development of mother plants, production of cuttings, and the recovery of applied N were measured. Number of cuttings was not affected by any treatments except for the low N concentration. The proportion of absorbed N was higher than that of water in the plants treated with 50 or 100 mg N/liter, while those fertilized with 200 or 400 mg N/liter absorbed more water relative to N uptake. Nitrogen recovery efficiency decreased from 70% to 10% for the 50- to 400-mg N/liter treatments, respectively. Percentage of applied N lost by leaching (30% to 70%), and N that could not be accounted for (0.5% to 20%), increased with increasing N concentration and NH4+ percentage in the solution. The minimum concentration to be used in fertilization of Pelargonium mother plants is 100 mg N/liter. Optimal N supplied ranged between 100 and 200 mg N/liter.

scholarly journals Optimal Nitrogen Practice in Winter Wheat-Summer Maize Rotation Affecting the Fates of 15N-Labeled Fertilizer

Agronomy ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 521
Author(s):  
Haiyan Liang ◽  
Pengfei Shen ◽  
Xiangze Kong ◽  
Yuncheng Liao ◽  
Yang Liu ◽  
...  
Keyword(s):  
Crop Yield ◽  
N Uptake ◽  
N Fertilization ◽  
Nitrogen Recovery ◽  
Shaanxi Province ◽  
Recovery Efficiency ◽  
N Losses ◽  
Nitrogen Recovery Efficiency ◽  
Potential Losses ◽  
N Management

Lower nitrogen recovery efficiency (NRE) and negative environmental impacts caused by excessive nitrogen (N) fertilization threaten the sustainability of agriculture. Efficient and appropriate fertilization practices are extremely important to achieve higher crop yield with minimum N loss. A field microplot experiment was conducted in a wheat-maize rotation system in Shaanxi province, at North China Plain, using the 15N isotope tracer technique to qualify the different annual N managements in terms of crop yield, NRE, N distribution in plant-soil, and N losses to optimize the N management. The experiment included four N treatments: conventional practice with 510 kg ha−1 annually in four applications (N1), and three optimized N treatments, reducing N rate to 420 kg ha−1, adjusting topdressing fertilizer times and using slow-release fertilizer (SRF) (N2, N3, N4). The results showed that the grain yield and N uptake did not differ significantly among treatments. N from fertilizer taken up (Ndff) by wheat was not affected by N management; however, in maize, Ndff performed differently. Optimized treatments significantly decreased the Ndff as compared to N1 treatment. Furthermore, NRE of wheat and annual nitrogen recovery efficiency (annual NRE) did not differ among treatments in 2016 but significantly increased in 2017 compared to N1. Annual NRE in 2017 was similar to that obtained for wheat. For maize, optimized N managements decreased the NRE in N3 and N4 treatments of two years. Potential losses in wheat were also similar amongst treatments, but in maize, N3 and N4 had lower residual N in the soil’s top 60 cm but resulted in higher potential losses than N1 and N2. Overall, our results demonstrate that applying 420 kg N ha−1 annually in three applications and combining SRF and urea are effective to sustain crop yield, improve the efficiency of N usage by maize, and reduce N losses in this region.

Ground Cover Rice Production System Increases Yield and Nitrogen Recovery Efficiency

2012 ◽  
Vol 104 (5) ◽  
pp. 1399-1407 ◽  
Author(s):  
Hang Qu ◽  
Hongbin Tao ◽  
Yueyue Tao ◽  
Meiju Liu ◽  
Kangrong Shen ◽  
...  
Keyword(s):  
Production System ◽  
Ground Cover ◽  
Rice Production ◽  
Nitrogen Recovery ◽  
Recovery Efficiency ◽  
Nitrogen Recovery Efficiency

scholarly journals Nitrogen Recovery Efficiency from Urea Treated with NSN Co-Polymer Applied to No-Till Corn

Agronomy ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 154 ◽  
Author(s):  
Pablo Barbieri ◽  
Hernán Sainz Rozas ◽  
Hernán Echeverría
Keyword(s):  
Grain Yield ◽  
Management Practices ◽  
Nitrogen Recovery ◽  
N Recovery ◽  
Recovery Efficiency ◽  
N Losses ◽  
Nitrogen Recovery Efficiency ◽  
No Till ◽  
Total Ammonia ◽  
N Recovery Efficiency

Nitrogen (N) rate increases used by many farmers produce a reduced or null effect on N recovery efficiency (RE) by crops. Therefore, management practices to reduce N losses and increase RE are necessary. Co-polymer maleic itaconic acid (NSN) have become available for use with urea and has shown potential in reducing N losses. The objective of this study was to evaluate the effectiveness of urea treated with NSN on grain yield and RE in a no-till corn. A field experiment was carried out at Balcarce, Argentina over three years, evaluated treatments were urea and urea + NSN at 120 N kg ha−1, and additional 0 N treatment was included. Urea + NSN was effective to reduce total ammonia volatilization losses, and the average of two years were 1.4 (1.1% to N applied) and 8.7 kg ha−1 (7.2% to N applied) for urea + NSN and urea, respectively. However, while grain yield and N grain removal were not affected by urea + NSN, the N rate significantly increased grain yield and N grain removal. Nitrogen recovery efficiency was not affected by urea + NSN, RE (average of three years) was 29.0% and 27.8% for urea and urea + NSN, respectively. In conclusion, there was no advantage of using urea treated with NSN in no-till corn overgrain yield, N grain removal, or RE.

scholarly journals Nitrogen recovery efficiency for corn intercropped with palisade grass

Bragantia ◽  
2018 ◽  
Vol 77 (4) ◽  
pp. 557-566
Author(s):  
Rodrigo Estevam Munhoz de Almeida ◽  
José Laércio Favarin ◽  
Rafael Otto ◽  
Henrique Franco ◽  
André Froes Borja Reis ◽  
...  
Keyword(s):  
Nitrogen Recovery ◽  
Recovery Efficiency ◽  
Nitrogen Recovery Efficiency
Sign in / Sign up

Export Citation Format

Share Document