A New Volumetric Method for the Estimation of Sodium

1. A volumetric method for the determination of sodium which can be separated as a triple salt (uranium zinc sodium acetate) from mixed solutions is described. The reduction of the uranium with titanous chloride, upon which it depends is shown to be quantitative.2. Calcium, magnesium, and relatively large proportions of potash do not interfere. The procedure for the removal of iron, aluminium and phosphates by gentle ignition is simple and obviates the risk of error by the introduction of sodium as an impurity in the chemical reagents necessary for precipitation methods.3. 0.1 mg. of sodium can be determined accurately.

Download Full-text

Non-ionic surface active agents. Determination of cloud point index. Volumetric method

10.3403/01277546u ◽

2015 ◽

Keyword(s):

Cloud Point ◽

Volumetric Method ◽

Point Index ◽

Surface Active Agents ◽

Surface Active

Download Full-text

Liming materials. Determination of the breakdown of granulated calcium and calcium/magnesium carbonates under the influence of water

10.3403/30166079 ◽

2009 ◽

Keyword(s):

Influence Of Water ◽

Calcium Magnesium

Download Full-text

Adolescent athletes and nutrition – analysis of two groups of children

SPORT AND SOCIETY ◽

10.36836/2020/1/3 ◽

2020 ◽

pp. 1-6

Author(s):

Tatyana Dzimbova

Keyword(s):

Energy Expenditure ◽

Energy Intake ◽

Eating Habits ◽

Energy Deficit ◽

Young Athletes ◽

Adolescent Athletes ◽

Basketball Players ◽

Calcium Magnesium ◽

The Right

Introduction. Proper nutrition is crucial for child and adolescent athletes to maintain growth and development and to achieveoptimal results in sports. It is very important to balance the energy expenditure with the energy intake in order to prevent the energy deficit or excess.Materials and methods. Subjects involved in two different sports participated in the study: 13 gymnasts (age 13.8 ± 4.1 years, height 153.4 ± 11.3 cm, weight 47.1 ± 10.5 kg) and 15 basketball players (age 15.5 ± 1.1 years, height 176.7 ± 7.9 cm, weight 65.2 ± 10.7 kg). Determination of total energy expenditure was made by prediction equations. The subjects maintained a food records for 5 consecutive days, which were processed in the ASA24 system of the NCI. Results and discussion. Energy intake in both groups is sufficient to meet the daily needs, development of young athletes andprovide the energy needed in training. The intake of three minerals (calcium, magnesium and potassium) and three vitamins (D, E and A) was lower than recommended values in both groups.Conclusion. As a result of the busy schedule of adolescent athletes, their main meals are out of home, and the proportion of highly processed foods containing small amounts of important vitamins and minerals is high. The main recommendations include dairy products, fruits, vegetables and whole grains. The idea behind the changes is to give young athletes the right diet and the right eating habits.

Download Full-text