Bioactive proteins in bovine colostrum and effects of heating, drying and irradiation

2020 ◽  
Vol 11 (3) ◽  
pp. 2309-2327
Author(s):  
Dereck E. W. Chatterton ◽  
Sasha Aagaard ◽  
Tim Hesselballe Hansen ◽  
Duc Ninh Nguyen ◽  
Cristian De Gobba ◽  
...  
Keyword(s):  
Gamma Irradiation ◽  
Spray Drying ◽  
Bovine Colostrum ◽  
Microbial Safety ◽  
Bioactive Proteins ◽  
Selection Of

Bioactive proteins in bovine colostrum are affected by the type of pasteurization and spray drying and if gamma irradiation is used to improve microbial safety during packaging. Selection of the correct conditions preserves these important proteins.

Development of a rapid screening protocol for selection of strains resistant to spray drying and storage in dry powder

2010 ◽  
Vol 1 (2) ◽  
pp. 165-174 ◽  
Author(s):  
S. Reimann ◽  
F. Grattepanche ◽  
C. Baggenstos ◽  
E. Rezzonico ◽  
B. Berger ◽  
...  
Keyword(s):  
Spray Drying ◽  
Bifidobacterium Longum ◽  
Survival Rates ◽  
Screening Method ◽  
Rapid Screening ◽  
Fast Screening ◽  
Screening Protocol ◽  
The Stability ◽  
And Storage ◽  
Selection Of

An efficient screening method for selection of Bifidobacterium longum strains resistant to spray drying and storage was developed based on randomly amplified polymorphic DNA (RAPD) for identification of the best survivors in mixed strains bacterial preparations. Three different primers were used to generate RAPD profiles of 22 B. longum strains. All strains were distinguished according to their RAPD profiles except for the strain NCC2705 and its H2O2 resistant derivative variant. The 22 strains were grouped in 3 batches of 7, 7 and 8 strains and subjected to spray drying and storage at 30 and 37 °C under anaerobic conditions. Batch survival rates after spray drying reached 17.1±4.4%. Strains showing the highest prevalence and/or resistance to storage at 37 °C were selected from individual batches for subsequent spray drying and storage testing. After 67 days of storage, NCC572 was identified as the dominant strain in powder. The stability of strain NCC572 was confirmed by performing single spray drying and storage tests. Out of 22 B. longum strains, a robust strain was identified by combining RAPD with a simultaneous screening test for survival under spray drying and storage. The method allowed a fast screening of B. longum strains in mixture for resistance to spray drying and storage compared to traditional screening procedures carried out with individual strains, in the same conditions. This approach could be applied to other stress conditions.

scholarly journals Impact Analysis and Selection of Spray Drying Parameters for Dawn and Feather Protein Hydrolysates

2019 ◽  
Vol 49 (3) ◽  
pp. 390-396
Author(s):  
Анастасия Пискаева ◽  
Anastasiya Piskaeva ◽  
Ольга Бабич ◽  
Olga Babich ◽  
Йонг Янг ◽  
...  
Keyword(s):  
Amino Acids ◽  
Spray Drying ◽  
Flow Rate ◽  
Mass Fraction ◽  
Air Flow ◽  
Feed Additives ◽  
Waste Products ◽  
Drying Temperature ◽  
Promising Source ◽  
Selection Of

Down and feather waste represents a promising source of feed protein. The main component of feather is protein, predominantly β-keratine. Keratin is a mechanically durable and chemically unreactive protein with cistein, glutamine, and protein as dominating amino acids in its structure. According to the chemical composition (amino acid content, balance of micro-and macronutrients), the feather raw material is a valuable source of nutrients as a component of feed additives. The aim of this work was to analyze the efficiency and selection of parameters of spray drying of hydrolysate of feather and down waste products. Dry feed additives obtained by spray drying have a lot of advantages, such as dosing accuracy, compactness, storage time, and a possibility of targeted use in dissolved form. In addition, they are easy to package and transport. The most important quality indicators of feed additives include the mass fraction of moisture and the yield of the finished product. The main parameters of spray drying that affect the mass fraction of moisture and the yield of the final product are the drying temperature, aspiration (air flow rate), and the rate of solution feeding to the installation. According to the experiment conducted, the spray drying temperature of 70.0 ± 5.0°C caused no loss of essential amino acids. In addition, no undesirable substances were formed, unlike in other technologies that use hightemperature treatment (90–120 ± 5.0°C) and hydrolysis, which reduces the biological value of the feed product. This temperature was found optimal for keratin hydrolysates during drying. The optimal value of the parameter of the solution flow rate was 6.5 ± 0.5 ml/min. The optimal range of air flow rates during spray drying of hydrolysates of feather raw materials was 20.0 ± 5.0 m3/h. This temperature provides the maximum yield of the finished product and the minimum mass fraction of moisture.

Effect of Modified Atmosphere Packaging and Irradiation in Combination on Content of Nitrosamines in Cooked Pork Sausage

2003 ◽  
Vol 66 (6) ◽  
pp. 1090-1094 ◽  
Author(s):  
I. H. SONG ◽  
W. J. KIM ◽  
C. JO ◽  
H. J. AHN ◽  
J. H. KIM ◽  
...  
Keyword(s):  
Gamma Irradiation ◽  
Correlation Coefficient ◽  
Irradiation Dose ◽  
Modified Atmosphere Packaging ◽  
Modified Atmosphere ◽  
Microbial Safety ◽  
Chemical Safety ◽  
Pork Sausage

The effect of modified atmosphere packaging and irradiation in combination on nitrosodimethylamine (NDMA) and nitrosopyrrolidine (NPYR) levels in pork sausage was studied. Emulsion-type cooked pork sausage was manufactured and packaged in aerobic, CO2 (100%), N2 (100%), and CO2/N2 (25%/75%) environments, respectively, and irradiated at 0, 5, 10, and 20 kGy with gamma irradiation. The nitrosamine contents were significantly reduced by irradiation, and the reduction of nitrosamines was more extensive with modified atmosphere packaging than with aerobic packaging. The correlation coefficient between irradiation dose and nitrosamine content indicated that irradiation can reduce the levels of nitrosamines. The combination of irradiation and modified atmosphere packaging is effective in enhancing the chemical safety of sausage by reducing nitrosamines, if present, as well as enhancing the microbial safety of cooked pork sausage.

Selection of symbiotic efficient and high salt-tolerant rhizobia strains by gamma irradiation

2010 ◽  
Vol 61 (2) ◽  
pp. 291-297 ◽  
Author(s):  
Imen Challougui Fatnassi ◽  
Salwa Harzalli Jebara ◽  
Moez Jebara
Keyword(s):  
Gamma Irradiation ◽  
High Salt ◽  
Salt Tolerant ◽  
Selection Of

scholarly journals Efficacy of the spray-drying treatment to inactivate the bovine leukemia virus in bovine colostrum

2020 ◽  
Vol 103 (7) ◽  
pp. 6504-6510
Author(s):  
Marina Lomónaco ◽  
Mariana Sowul ◽  
Gerónimo Gutiérrez ◽  
Dario Malacari ◽  
Irene Álvarez ◽  
...  
Keyword(s):  
Spray Drying ◽  
Bovine Leukemia Virus ◽  
Leukemia Virus ◽  
Bovine Colostrum ◽  
Drying Treatment
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