Promising areas of zeolite application in milk purification from toxic elements

The article reveals the data on lead and cadmium content in raw milk samples taken in seven areas located in two districts of Semey Territory of East Kazakhstan Region (Abay and Ayagoz Districts). The authors determined high content of lead (from 0.11 to 0.15 mg/l) in milk samples taken in the populated areas which are located closer to the territory of the former Semipalatinsk Nuclear Test Site. To reduce the content of toxic elements in raw milk the authors developed an experimental filtration unit using natural zeolite brought from Tarbagataysky deposit (East Kazakhstan Region) as sorption-filtering material. Natural zeolite module SiO2/Al2O3 consists of 6.3 units which characterizes it as a high-purity clinoptilolite, highly efficient sorption ion-exchange material. As a result of the experiments the authors determined that natural zeolite taken from Tarbagataysky deposit of East Kazakhstan Region shows sorption properties in relation to lead and cadmium ions. Zeolite application as a sorption-filtering material helps reduce cadmium and lead ion content in milk during filtration. The most suitable processing parameters of milk filtration which help change the content of the considered elements significantly are the following: filtration temperature should be 18–20°C, pump rotation frequency – 300 rpm with filter of the experimental unit which consists of 200 g of natural zeolite. Besides, the authors studied the changes in organoleptic, physical and chemical properties of milk during filtration. The authors determined that organoleptic, physical and chemical properties during milk filtration using natural zeolite as a sorption-filtering material do not change and comply with the regulatory requirements which specify fresh milk quality parameters. Titratable acidity of milk reduces insufficiently.

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ANALYSIS OF SOME PHYSICAL AND CHEMICAL PROPERTIES OF YOGHURT WITH BIFIDOBACTERIUM IN BELARUS.

Food Industry: Science and Technology ◽

10.47612/2073-4794-2021-14-1(51)-79-92 ◽

2020 ◽

Vol 14 (1(51)) ◽

pp. 79-92

Author(s):

I. V. Podorozhniaya ◽

S. S. Vetokhin

Keyword(s):

Water Activity ◽

Freezing Point ◽

Chemical Properties ◽

Titratable Acidity ◽

Raw Milk ◽

Physical And Chemical Properties ◽

Nonfat Milk ◽

Milk Solids ◽

Physical And Chemical ◽

And Chemical Properties

The values of freezing point, titratable and active acidities, conductivity, water activity, humidity, nonfat milk solids the of samples of market bioyoghurt were analyzed. They significantly differ from the same row milk indicators. So, they demonstrated lower values of freezing point, active acidity, water activity, humidity, and increased values of titratable acidity and conductivity, and nonfat milk solids. A large dispersion of the studied products’ properties was found for each manufacturer production as well as between producers. Yoghurts with Bifidobacterium that were produced at the Brest region had the highest values of рН, nonfat milk solids and lowest values of freezing point and humidity. This fact evidences the manufacturer has a well-established technological process for the production of bioyogurt and traceability of raw milk supply. The boundaries of the confidence intervals of physical and chemical properties both by individual manufacturers and jointly were determined. A close relationship between conductivity and freezing point in bioyoghurts of some manufacturers has been found. The dynamics of their changes in last years is traced.

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Statistical criteria of stellar population types

Symposium - International Astronomical Union ◽

10.1017/s0074180900053304 ◽

1966 ◽

Vol 24 ◽

pp. 101-110

Author(s):

W. Iwanowska

Keyword(s):

Stellar Population ◽

Chemical Properties ◽

Spectrophotometric Study ◽

Physical And Chemical Properties ◽

Population Type ◽

The Galaxy ◽

Distribution Parameters ◽

Physical And Chemical ◽

Statistical Criteria ◽

And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

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Only one sugar offers you such a variety of important physical and chemical properties

Chemical & Engineering News ◽

10.1021/cen-v037n007.p004 ◽

1959 ◽

Vol 37 (7) ◽

pp. 4

Keyword(s):

Chemical Properties ◽

Physical And Chemical Properties ◽

Physical And Chemical ◽

And Chemical Properties

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Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

Annals of Tropical Research ◽

10.32945/atr39sa3.2017 ◽

2017 ◽

pp. 31-43

Author(s):

Berta Ratilla ◽

Loreme Cagande ◽

Othello Capuno

Keyword(s):

Block Design ◽

Management Strategies ◽

Chemical Properties ◽

Organic Fertilizers ◽

Growth And Yield ◽

Physical And Chemical Properties ◽

Total N ◽

Randomized Complete Block Design ◽

Physical And Chemical ◽

And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

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