scholarly journals Gymnorhynchus gigas in Lepidopus caudatus (Actinopterygii: Perciformes: Trichiuridae): prevalence and related effects on fish quality

2014 ◽  
Vol 32 (No. 4) ◽  
pp. 320-325 ◽  
Author(s):  
F. Giarratana ◽  
D. Muscolino ◽  
Ch. Beninati ◽  
G. Ziino ◽  
A. Giuffrida ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Total Volatile ◽  
Fish Quality ◽  
Total Volatile Basic Nitrogen ◽  
Basic Nitrogen ◽  
Hygienic Quality ◽  
High Prevalence ◽  
The Mediterranean

We evaluated the effects of Gymnorhynchus gigas on the freshness and hygienic quality of Lepidopus caudatus. Total Volatile Basic Nitrogen (TVB-N), Trimethylamine Nitrogen (TMA-N), as well as Specific Spoilage Organisms (SSOs) are the most important freshness indicators in fish. Our study was carried-out on 65 specimens of L. caudatus kept in ice and stored at 2°C for different period of time. The microbiological charge of SSOs recovered on a portion of parasitised muscles (MP) was compared with those recovered on portions of parasite-free muscles (M). The contents of TVB-N and TMA-N on MP, M, and G. gigas larva/ae were measured using the Conway microdiffusion method. High prevalence (72.31%) of G. gigas in the specimens of L. caudatus from the Mediterranean sea was observed. No statistically significant differences (P < 0.05) between M and MP were found during storage. However, massive infestation of G. gigas on the muscle of the silver scabbardfish could negatively influence TVB-N values, without compromising the sensorial characteristic of fish.

Hygienic Quality and Shelf Life of a Moroccan Cooked (Kosher) Sausage

1995 ◽  
Vol 58 (2) ◽  
pp. 182-185 ◽  
Author(s):  
AHMED DAOUDI ◽  
FRANK A. STOLLE ◽  
ABDELHAMID BELEMLIH ◽  
HENRI R. ZAMBOU ◽  
HARTMUT G. EISGRUBER
Keyword(s):  
Ambient Temperature ◽  
Shelf Life ◽  
Water Activity ◽  
Total Volatile ◽  
Total Volatile Basic Nitrogen ◽  
Basic Nitrogen ◽  
Sensory Changes ◽  
Quality And Shelf Life ◽  
Microbial Status

Sensory, physicochemical and microbiological changes in Moroccan cooked kosher sausages stored at 6°C and 25°C were monitored over 35 days. Kosher sausages were very prone to changes in microbial status, as a result of high pH and water activity-values (aw-values) after processing. After 3 days of storage at 25°C and 1 week at 6°C the microbial colonies increased distinctively. Sensory changes were only detectable after the seventh day at 25°C. At 6°C, these sausages kept their sensorial characteristics. Levels of total volatile basic nitrogen were lower in the kosher sausages at 6°C than in those kept at 25°C. Changes at 25°C affected the quality of kosher sausage and limited the shelf life. From these results it can be concluded that storage at 25°C (ambient temperature) for 3 days or at 6°C (chilling) for 7 days without sensory changes is possible.

scholarly journals Effect of freshness grade of anchovy (Engraulis encrasicolus) on the quality of marinated product stored at 4°C

2020 ◽  
Vol 7 (2) ◽  
pp. 54
Author(s):  
Nalan Gokoglu ◽  
Ilknur Ucak
Keyword(s):  
Ambient Temperature ◽  
Thiobarbituric Acid ◽  
Quality Parameters ◽  
The Other ◽  
Raw Material ◽  
Total Volatile ◽  
Total Volatile Basic Nitrogen ◽  
Engraulis Encrasicolus ◽  
Basic Nitrogen

The aim of this study was to investigate the effects of raw material freshness on the quality of marinated fish. The raw material anchovy (Engraulis encrasicolus) was divided into two batches. One batch (A) was kept at ambient temperature (20°C) for 6 h and the other one was kept at 0°C for 72 h. Then, they were marinated by soaking into marination solution containing 3% acetic acid and 8% NaCl. Total volatile basic nitrogen (TVB-N), trimethylamine (TMA), thiobarbituric acid (TBA), para-anisidine (p-Av) values in both marinated samples increased significantly during storage at 4°C. Increases in quality parameters were higher in samples produced with raw anchovy kept at 20°C compared to samples kept at 0°C. Although the sensory scores of both samples decreased during storage, higher scores were obtained for samples kept at 0°C compared to samples kept at ambient temperature. According to the results of the study, it has been determined that the quality of the raw material significantly (p<0.01) affects the quality of marinated anchovy.Keywords: fish; quality; anchovy; marinade; raw material 

Hygienic Quality and Shelf Life of a Moroccan Cooked (Kasher) Sausage

1995 ◽  
Vol 58 (7) ◽  
pp. 820-823
Author(s):  
AHMED DAOUDI ◽  
FRANK A. STOLLE ◽  
ABDELHAMID BELEMLIH ◽  
HENRI R. ZAMBOUand ◽  
HARTMUT G. EISGRUBER
Keyword(s):  
Ambient Temperature ◽  
Shelf Life ◽  
Water Activity ◽  
Total Volatile ◽  
Total Volatile Basic Nitrogen ◽  
Basic Nitrogen ◽  
Sensory Changes ◽  
Quality And Shelf Life ◽  
Microbial Status

Sensory, physicochemical and microbiological changes in Moroccan cooked kasher sausages stored at 6°C and 25°C were monitored over 35 days. Kasher sausages were very prone to changes in microbial status, as a result of high pH and water activity-values (aw-values) after processing. After 3 days of storage at 25°C and 1 week at 6°C the microbial colonies increased distinctively. Sensory changes were only detectable after the seventh day at 25°C. At 6°C, these sausages kept their sensorial characteristics. Levels of total volatile basic nitrogen were lower in the kasher sausages at 6°C than in those kept at 25°C. Changes at 25°C affected the quality of kasher sausage and limited the shelf life. From these results it can be concluded that storage at 25°C (ambient temperature) for 3 days or at 6°C (chilling) for 7 days without sensory changes is possible.

Effects of Different Freezing Rates on the Quality Changes in Cooked Crayfish (Procambarus clarkia) Meat during Frozen Storage (-20°C)

2014 ◽  
Vol 1033-1034 ◽  
pp. 673-676
Author(s):  
Li Zhao ◽  
Jun Chen ◽  
Xi Rong Zhao ◽  
Zong Yao Wang
Keyword(s):  
Ph Value ◽  
Frozen Storage ◽  
Thiobarbituric Acid ◽  
Acid Value ◽  
Total Volatile ◽  
Total Volatile Basic Nitrogen ◽  
Basic Nitrogen ◽  
Thiobarbituric Acid Value ◽  
Sensory Score

Changes in physical, chemical, microbiological and sensory qualities of cooked crayfish (Procambarus clarkia) meat, treated at different freezing rate (-30°C,CPF; -60°C,ULTF; -196°C,LNM), were investigated during storage at -20°C for up to 6 months. pH value increased in all treatments with the sharp reduction after 3 months. Increase in weight loss of LNM was slower than that of CPF and ULTF cooked crayfish. During frozen storage, thiobarbituric acid value (TBA value) fluctuated in all treatments, but lipid oxidation did not affect the quality of crayfish meat because of its lower fat contents. Total volatile basic nitrogen (TVB-N) increased with storage time, with the reduction of TVC and sensory score. Freezing rates could not cause significant changes in chemical qualities (pH value, total volatile basic nitrogen, thiobarbituric acid value), sensory quality and microbiological quality for all three treatments during storage. In spite of decrease of quality of cooked crayfish meat in all treatments, good edibility was kept throughout the storage.

scholarly journals Analysis of the Correlation Between the Freshness Indices of Pork and its Pork Exudate

2019 ◽  
Vol 23 (1) ◽  
pp. 63-69
Author(s):  
Yunfeng Hu ◽  
Yadi Wang ◽  
Yuxuan Tang
Keyword(s):  
Storage Time ◽  
Correlation Coefficients ◽  
Total Volatile ◽  
Total Volatile Basic Nitrogen ◽  
Consumption Level ◽  
Important Index ◽  
Basic Nitrogen

Abstract In recent years, as the Chinese consumption level increased, the consumption quantity of fresh pork had been increasing year by year. Freshness was an important index to judge the quality of pork. This study aimed to analyze freshness indices change of pork and pork exudate during storage. Thus the conclusion of this study was to characterize freshness change of pork by change law of freshness indices of pork exudate. So as to provide a reference for more convenient determination of the pork freshness. The results showed that the freshness indices of pork and their exudates change accordingly with the increase of storage time. On day 3, the pork seeped out more obvious juice. The turbidity of pork and its exudates increased gradually with the decrease of freshness, and sensory scores decreased gradually. The color changed from bright red to reddish brown and finally grey brown. The indicators of pork and their exudates (the total volatile basic nitrogen, the pH, a* and turbidity levels) were significantly correlated at the 0.01 level, the correlation coefficients were 0.9727, 0.9823, 0.9205, and 0.8765, respectively. Therefore, freshness indices of pork exudates can reflect the freshness of pork.

Total volatile basic nitrogen (TVB-N) and its role in meat spoilage: A review

2021 ◽  
Vol 109 ◽  
pp. 280-302
Author(s):  
Alaa El-Din A. Bekhit ◽  
Benjamin W.B. Holman ◽  
Stephen G. Giteru ◽  
David L. Hopkins
Keyword(s):  
Total Volatile ◽  
Total Volatile Basic Nitrogen ◽  
Meat Spoilage ◽  
Basic Nitrogen
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