摘要:

Summary

ISSN:0890-5436    

DOI:10.1080/08905439909549973

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

The chemical characteristics and microorganisms involved in the production of “Tonou”; a food condiment prepared from the seeds ofParkia biglobosa,peanut and soybean were investigated. It is quite a bit different from the one called “Dawadawa”; by the Hausas who inhabit most of the northern parts of West Africa. Its difference with “Tonou”; is due to its materials made exclusively of locust bean. Various bacterial have been identified in the product. The genera of bacteria isolated were Bacillus and Staphylococcus.. Bacillus was the predominant genus, especiallyBacillus subtilis. “Tonou”; is rich in proteins (37–40%). Free amino acids content increased in fermented seedsof Parkia biglobosa.In addition, “Tonou”; is a source of trace element, especially Fe, Mg and Zn are in high proportion.

ISSN:0890-5436    

DOI:10.1080/08905439909549974

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

Rosmarinic acid (RA) and related phenolics are natural antioxidants found as secondary metabolites in spearmint(Mentha spicata).These phenolic‐secondary metabolites have diverse food processing and nutraceutical applications. Since natural cross‐pollination results in plant to plant variation in the level of phenolic metabolites, tissue culture‐based techniques are essential to isolate elite antioxidant‐producing clonal lines. The objective of this research is to develop tissue culture‐based selection techniques to isolate high rosmarinic acid and phenolic‐producing clonal lines from a heterogenous bulk seed population of spearmint. Multiplied clonal shoots of each line were screened for tolerance to azetidine‐2‐carboxylate (A2C). Individual shoot apex of each line were also screened forPseudomonastolerance. Rosmarinic acid and total phenolics were assayed in all treated clonal lines and compared to uninoculated/untreated shoot expiants of corresponding line. ThePseudomonasand A2C treatment strategy allowed the rapid tissue culture‐based screening of potentially high phenolic antioxidant‐producing clonal lines of spearmint for future field and greenhouse evaluation. Targeted elite lines had combinations ofPseudomonastolerance with no loss in biomass in response to the bacterium and enhanced levels of total phenolics and rosmarinic acid in response to A2C.

ISSN:0890-5436    

DOI:10.1080/08905439909549975

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

The rheological properties of the fermentation broth during pullulan production from synthetic medium byAureobasidium pullulansP56 in a stirred tank fermentor were investigated. The mycelial forms and the production of extracellular polysaccharide were responsible for the non‐newtonian flow behaviour of the fermentation broth. The rheological behaviour can be characterized by a power law type of equation. The relationship shear rate/shear stress and shear rate/apparent viscosity showed a non‐newtonian behaviour of the fermentation broth. The power law index was found to be a sensitive factor for the indication of the pseudoplastic behaviour of the broth.

ISSN:0890-5436    

DOI:10.1080/08905439909549976

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

摘要:

The objective of this study was to investigate the specificity of an extracellular proteinase from Brevibacterium linens FLK‐61 on the degradation of milk proteins (αs1, ß‐casein, sodium caseinate and whey proteins). Each protein and the enzyme solution were incubated at 45° C for “0”;, 15, and 30 min and 1, 2, 3, 4, and 5 h. After that, hydrolysis of the proteins was evaluated by urea‐PAGE electrophoresis and densitometry. It was found that the enzymatic degradation of αstcasein occured much faster and it was more complete (P<0.01) than degradation of β‐casein. No degradation of whey proteins was found during 5 h incubation.

ISSN:0890-5436    

DOI:10.1080/08905439909549977

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor

ISSN:0890-5436    

DOI:10.1080/08905439909549972

出版商:Taylor & Francis Group    

年代:1999

数据来源: Taylor