Shrimp extracts

This study, a range of temperatures, lighting periods and salinity levels were examined for cyst hatching. The quality nauplii from optimized cyst hatching conditions were used to determine the toxicity of 26 methanol extracts of 24 poisonous plant species collected from the mountainous regions in Quang Tri province of Vietnam.

13p dianmotminh02 03-05-2024 2 1   Download

Part 2 book "Aquaculture microbiology" includes content: Characterization of probiotic properties of isolated bacteria; antibacterial activity of probiotic bacteria from aquaculture; preparation of marine algal (seaweed) extracts and quantification of phytocompounds; treating bacterial infections in fishes and shrimps using seaweed extracts; preparation and treatment of seaweed encapsulated pellet feed in fisheries aquaculture; treatment using seaweeds in fishes and shrimp by in vivo method;... and other contents.

100p muasambanhan07 20-02-2024 0 0   Download

This study aimed to quantify the phenolic contents and the antioxidant capacities of leaf extract powders from three Myrtaceae plants, namely Cleistocalyx operculatus (Vietnamese name: Vối), Psidium guajava (Ổi), and Rhodomyrtus tomentosa (Sim), investigate their inhibitive activities on the growth of bacteria isolated from spoiled shrimps, and evaluate their values as preservative agents in the cold storage of Pacific whiteleg shrimps (Penaeus vannamei).

15p viengels 25-08-2023 7 2   Download

We have carried out studying for antioxidant activity of 58 extracts prepared from vegetables and fruits in Viet Nam by three methods including DPPH and H2O2 scavenging activity assays and determination of total flavonoid content (TFC). Ethanol extract of Tamarind seed (NTBT-17), Grape seed (NTBT-19) and Mangosteen peel (TNB-10) showed high amount of TFC which is 848.8, 655.9 and 422.9 mgQE/100g, respectively.

8p vidoctorstrange 06-05-2023 6 3   Download

Vibrio parahaemolyticus is the main causative agent of acute hepatopancreatic necrosis disease (AHPND) in shrimp. This study aimed to investigate how shrimp extracts affect the growth and virulence of an AHPND-causative strain known as V. parahaemolyticus XN9.

4p vicedric 08-02-2023 4 1   Download

Chitosan is produced from shrimp waste chitin at three particle sizes 20, 40 and 60 mesh by deacetylating with different concentrations of NaOH solution (30%, 40% and 50%) under microwave irradiation for 10 min.

9p schindler 30-12-2021 7 0   Download

Tyrosinase plays an important role in the formation of melanin. Thus, the process of melanin formation can be reduced through the inhibition of tyrosinase. The objective of this study is to investigate the tyrosinase inhibitory activity of different red seaweeds harvested in the coast of Khanh Hoa Province.

6p viyeri2711 14-09-2021 12 2   Download

Carrageenan was extracted from Kappaphycus alvarezii alga for application in shrimp preservation to reduce the loss of dry matter during preserving frozen shrimp. The main material in this study is dried alga. The solution 3% NaOH was used to remove color compounds and lipids.

9p kequaidan8 02-11-2020 9 2   Download

Astaxanthin is a xanthophyll carotenoid, which exhibits many important biological activities including a high degree of antioxidant capacity (AOC) and antibacterial activity, hence has a significant applicability in food, pharmaceutical and cosmetic industries.

7p vijiraiya2711 27-05-2020 12 1   Download

In this study, factors affecting the extraction yield of carotenoids from dried shrimp waste by organic solvents have been studied. The results showed that the solvent ratio hexane: acetone = 3: 1 gave the highest carotenoid yield. At this ratio of solvent’s mixture, the carotenoid yield reached highest at temperature 60 C after 2 hours extraction, which was 44.64 µg/g raw shrimp waste (d.b.) (ratio of solvent to raw material 3/1). Ultrasound or vortexing gave higher extraction yield than in static conditions, which was 1.8- fold to 1.5- fold increase, respectively.

7p chauchaungayxua2 07-01-2020 9 1   Download

Changes in melanosis, microbiology, and fat oxidation in Pacific white shrimps (Litopenaeus vannamei) when treated with Houttuynia cordata extract (designated E-DC) were monitored during cold storage for seven days at 20 C. Whole shrimps treated with E-DC solution (0.025%, w/v) revealed slow growth of total aerobic microorganisms, Enterobacteriaceae and Pseudomonas aeruginosa, throughout cold storage in comparison to the control sample treated by water (p0.05).

5p caygaocaolon1 13-11-2019 40 1   Download

Antibacterial, antifungal and cytotoxic activities of ethanol extract of tuberous roots of Amorphophallus campanulatus were studied. Disc diffusion technique was used to determine in vitro antibacterial and antifungal activities. Cytotoxicity was determined against brine shrimp nauplii.

6p vitamix 15-02-2019 29 1   Download

The antimicrobial and cytotoxic activities of n-hexane, methanol, ethanol, ethyl acetate and water extracts of Ceratonia siliqua L. leaves were evaluated in this study. The cytotoxic activity of the extracts was evaluated by the brine shrimp lethality bioassay.

4p vitamix 15-02-2019 19 0   Download

Early mortality syndrome (EMS) or acute hepatopancreatic necrosis disease (AHPND) is an emerging disease reported recently that has caused massive loss to saline shrimp aquaculture. EMS/AHPND was recognized in Vietnam since 2011 and up to now its adverse effect is still serious to shrimp industry nationwide. Determination of the main pathogenic factor and the role of other microbial candidates is a very important study.

7p vidanh27 08-12-2018 17 1   Download

Carotenoprotein was extracted by a hydrolysis method using both inorganic and organic acids. Shrimp heads were firstly hydrolyzed by adding a 0.2% (w/v) hydrochloric acid solution at room temperature for an hour following by hydrolyzing with a 0.4% (v/w) formic acid solution for another 2 h at the same temperature. The obtained carotenoprotein consisted of high contents of protein (57.8 wt.%) and carotenoids (473.9 ppm). This method is facile and efficient for the extraction of carotenoprotein from other shrimp and crab wastes on a large scale.

6p vidanh27 08-12-2018 22 0   Download