scholarly journals Characterization of Aerobic Spore-Forming Bacteria Isolated From Raw Milk, Skim Milk Powder and UHT Milk

2017 ◽  
Vol 38 (January-March) ◽  
pp. 99-111
Keyword(s):  
Milk Powder ◽  
Skim Milk ◽  
Raw Milk ◽  
Skim Milk Powder ◽  
Uht Milk ◽  
Spore Forming Bacteria

Influence of chromatographically pure bovine chymosin and pepsin A on cheese curd syneresis

1990 ◽  
Vol 57 (1) ◽  
pp. 119-124 ◽  
Author(s):  
Hans Andersson ◽  
Anders Andrén
Keyword(s):  
Milk Powder ◽  
Skim Milk ◽  
Raw Milk ◽  
Skim Milk Powder ◽  
Clotting Time ◽  
Experimental Conditions ◽  
Cheese Curd ◽  
Light Absorbance

SummaryThe influence of chromatographically pure bovine chymosin and pepsin A on cheese curd syneresis has been studied. The enzymes were compared in experiments using a microscale syneresis assay, where the light absorbance of the released whey was used as a measurement of the syneresis. The following parameters were investigated: reconstituted skim milk powder (RSM), bulk raw milk, CaCl2 addition and cutting time of the curd. The gelling (clotting) time was held constant under all experimental conditions to eliminate its influence on syneresis. The differences in influence on syneresis of the two enzymes were neither obvious nor uniform. As regards the syneresis of RSM, the influence of chymosin and pepsin seemed to be very similar, while the syneresis of bulk raw milk seemed to be more enhanced by chymosin. However, results were not sufficiently clear to prove any distinct differences between the enzymes. As long as the cheese curd is cut at a proper firmness, there are probably no practical problems in using bovine rennets with varying chymosin: pepsin ratio.

462. The keeping quality of composite milk

1952 ◽  
Vol 19 (1) ◽  
pp. 63-71 ◽  
Author(s):  
J. Babad ◽  
A. Shenhav-Hetman
Keyword(s):  
Milk Powder ◽  
Skim Milk ◽  
Raw Milk ◽  
Skim Milk Powder ◽  
Keeping Quality ◽  
Better Than

The keeping quality of various mixtures, made up of raw milk and skim milk-powder in varying proportions, has been studied. It has been found that the keeping quality of unpasteurized samples containing milk powder was slightly better than that of raw milk. The keeping quality of the pasteurized mixtures was satisfactory during the time of storage for 40 hr. at 23 and 18° C. and for 60 hr. at 10° C.

Folate and folate-binding protein content in dairy products

1997 ◽  
Vol 64 (2) ◽  
pp. 239-252 ◽  
Author(s):  
KARIN WIGERTZ ◽  
ULLA K. SVENSSON ◽  
MARGARETHA JÄGERSTAD
Keyword(s):  
Dairy Products ◽  
Binding Protein ◽  
Daily Intake ◽  
Milk Powder ◽  
Skim Milk ◽  
Skim Milk Powder ◽  
Enzyme Linked Immunosorbent Assay ◽  
Folate Binding Protein ◽  
Pasteurized Milk ◽  
Uht Milk

Recent findings suggest a protective role for folates in the reduction of neural tube defects and possibly also coronary heart disease and cancer. Consequently, an increase in the daily intake of folates is warranted, which emphasizes the need for quantitative as well as qualitative measurements of dietary folates. Milk plays an important part in the food chain in many Western countries today. Several studies suggest that folate-binding proteins might have an impact on folate absorption and therefore their concentrations are also important. The mean concentration of the predominant form of folate, 5-methyltetrahydrofolate (5-CH3THF), was determined using HPLC in thirteen selected dairy products; skim milk powder, two pasteurized milks, UHT milk, two fermented milks, three whey products and four different cheeses. All results were corrected for recovery by spiking the samples with 5-CH3THF. Effects of storage of dairy products on 5-CH3THF concentrations were also investigated; generally small and insignificant fluctuations were found, except for hard cheese, in which 5-CH3THF decreased significantly. There was a significant seasonal variation in the folate concentration of pasteurized milk which peaked in the summer months. The concentrations of folate-binding protein in skim milk powder and pasteurized milk analysed using an enzyme-linked immunosorbent assay were similar. UHT milk and fermented milk, both of which are processed at temperatures >90°C, contained significantly lower concentrations of folate-binding protein.

Application of capillary electrophoresis to the characterization of processed cheeses

2000 ◽  
Vol 67 (1) ◽  
pp. 91-100 ◽  
Author(s):  
BEATRIZ MIRALLES ◽  
MERCEDES RAMOS ◽  
LOURDES AMIGO
Keyword(s):  
Capillary Electrophoresis ◽  
Milk Powder ◽  
Skim Milk ◽  
Skim Milk Powder ◽  
Electrophoretic Patterns ◽  
Electrophoresis Method ◽  
Unknown Composition ◽  
Ph Buffer ◽  
Rennet Casein

Capillary electrophoresis using a hydrophilically coated capillary and a low pH buffer containing urea has been used to characterize processed cheeses. Different electrophoretic patterns were obtained depending on the ingredients used in the blend such as acid casein, rennet casein, sodium and calcium caseinates and skim milk powder. Isoelectric casein, and sodium and calcium caseinates were shown to contain intact non-glycosylated κ-casein (κ-CN), while rennet casein contained only trace amounts of κ-CN and mainly para-κ-CN. Therefore, the addition of casein or caseinate to processed cheeses has been detected by analysing the intact non- glycosylated κ-CN. Quantitation of intact non-glycosylated κ-CN in processed cheeses of known and unknown composition was carried out using a regression curve from standard mixtures of 150–550 g isoelectric casein/kg total rennet casein. This capillary electrophoresis method successfully confirmed the addition of isoelectric casein or caseinate to processed cheeses of known composition. The quantitative determination range was 0·605–3·688 mg κ-CN/ml. This method cannot be used for measuring additions of rennet casein or any caseinates that have been exposed to chymosin.

scholarly journals Development and Characterization of Carob Flour Based Functional Spread for Increasing Use as Nutritious Snack for Children

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Sema Aydın ◽  
Yüksel Özdemir
Keyword(s):  
Palm Oil ◽  
Milk Powder ◽  
Skim Milk ◽  
Skim Milk Powder ◽  
Market Potential ◽  
Overall Acceptability ◽  
Chocolate Spread ◽  
Work Done ◽  
To Receive

Carob flour enriched functional spread was developed and textural, sensory, colour, and some nutritional properties of the product were investigated. Spread samples were prepared with major ingredients for optimisation and minor ingredients for improving texture and aroma. Major ingredients were carob flour and hydrogenated palm oil (HPO) and minor ingredients were commercial skim milk powder, soya flour, lecithin, and hazelnut puree. The ratio of major ingredients was optimised using sensory scores and instrumental texture values to produce a carob spread that most closely resembles commercial chocolate spread (control), in both spreadability and overall acceptability. The amounts of minor ingredients (milk powder, 10%; soybean flour, 5%; lecithin, 1%; hazelnut puree, 4%) were kept in constant ratio (20%). Addition of hydrogenated palm oil (HPO) decreased the hardness and hardness work done (HWD) values in contrast to carob flour. Higher rates of carob flour were linked to lower lightness, greenness, and yellowness values. Spread was optimised at 38 g carob flour/100 g spread and 42 g hydrogenated palm oil/100 g spread level and the formulation tended to receive the highest sensory scores compared to other spreads and presented closer instrumental spreadability values to control samples. This indicates a strong market potential for optimised carob spreads.

Effects of chromatographically pure bovine chymosin and pepsin A on cheese curd firmness

1990 ◽  
Vol 57 (1) ◽  
pp. 109-117 ◽  
Author(s):  
Anders Andrén ◽  
Christina von Reedtz
Keyword(s):  
Ph Dependence ◽  
Milk Powder ◽  
Skim Milk ◽  
Raw Milk ◽  
Skim Milk Powder ◽  
Enzyme Concentration ◽  
Cheese Curd

SummaryThe effects of chromatographically pure bovine chymosin and pepsin A on cheese curd firmness have been investigated. The enzymes were studied in parallel experiments, using a Formagraph, under which the following parameters were tested and varied: reconstituted skim milk powder, bulk raw milk, CaCl2 addition, enzyme concentration and temperature. Chymosin had a slightly better rate of curd firming (P ≤ 0·001) and better curd firmness 30 min after gelling point compared to pepsin under all of the conditions investigated. However, as regards curd firmness in cheese manufacture, this difference is only a question of time, since pepsin will give the same degree of curd firmness of the cheesemilk as chymosin after some minutes. The biggest disadvantage with pepsin is its strong pH dependence, which can lead to very long gelling times and weak curd if the pH is too high and the rennet is dominated by pepsin.

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