Research on the content of vitamin C in orange juice

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Study of orange juice for the presence of vitamin C Авторы работы: Гущина Арина и Бекезина Анастасия Ученицы: 7 «В» класса Руководители: Хабарова Е.А. Якушкина Г.Б.

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The Problem Vitamins are very important for people. We need vitamins for the proper work of different parts of our body. They help us stay healthy and vivid. The lack of vitamins can be very dangerous. People should consume a lot of vitamins with food. One of the most important vitamins in autumn and winter is vitamin C

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THE AIM The aim of our work is to compare juices and fruits and to find out in which of them there is more vitamin C .

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THE PROJECTS The project objectives are to analyze special literature about types of vitamin C and about types of juices, to conduct a special survey among 7 year students and to find out their likes and dislikes

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The object of our study is juices and fruits The subject of our study is the amount of vitamins in juices and fruits The hypothesis: In freshly squeezed juice the amount of vitamin C is higher than in packed one Methods of study: theoretical analysis, a questionnaire, experiments and observation

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Vitamin C helps fight fatigue, resist infections, but it does not affect flu prevention. Only fresh juice and fruits are rich in vitamin C.

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Kinds of juice Juices can be natural freshly squeezed nectars and juice drinks

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Practical part

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С omparison table of popular juices Structure Fresh « Dobrii » « J7 » Nectar «365 days » concentration 100% 50 % 50 % 50 % carbrohydrates 10,4г 10,5г 11,2г 11г Lemon acid - + + + Energy value 45 kiloc 42 kiloc 46 kiloc 45 liloc Vitomin C 50 mg 12,8 mg 20 mg No data

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Experimental part Mix juices of various brands with starch paste. Add iodine drops until it becomes colored. If there is much vitamin C in the juice it will get violet the latest. As soon as iodine oxidizes all the vitamin C next drop will colour starch in blue. It is a quality reaction to starch

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Experiments

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The results 1. The concentration of vitamin C in freshly squeezed juices is more than twice higher than in packed ones. Manufacturers add sugar and preservatives for conservation 2. Manufacturers indicate the composition ot the juice on the package 3. Quality of the juice depends on its price 4. Juices are popular among 7 year students but they do not pay attention to the product composition

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Conclusions 1. Benefits of juices are well studied by people. All the necessary information can be found in the internet or on the packet of juice 2. There are 7 main groups of vitamins. Every vitamin affects the human organism in its own way 3. 7 year students prefer fruits to juices. Main criteria in choosing juices are taste and price of the product 4. Vitamin C is in both freshly squeezed and packed juices. The information of the concentration of vitamin C can be found on the package of the product. The better juice the more its price 5. Due to the results of the study we have proved the hypothesis that the largest amount of vitamin C is contained in freshly squeezed orange juice

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Recommendations in choosing the juice 1 . If you have a choice in eating a fruit or having a drink do not hesitate a minute – choose the first. Fruits are not only healthy the can also satisfy hunger. 2. If there is no possibility of having fresh juice choose that which has less sugar 3. Do not choose sweetened or acidified juices 4. Always be careful with the compound. The more it has preservatives the more it is harmful 5. If you are simply thirsty just have some mineral water 6. It is healthier to eat fruits or drink juice an hour before or after the meal

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СПИСОК ЛИТЕРАТУРЫ Самсонова А.Н., Ушева В.Б.Москва , Фруктовые и овощные соки. М., 1976год. Справочник – лечебник по народной и нетрадиционной медицине. ООО «Ариэль», 1993год. Большая иллюстрированная энциклопедия. Перевод с англ. А.Е. Домбаян ., Е.Е Домбаян . Москва. «Астрель», «АСТ». 2004 год. Амосов И.М., Бендет Я.А. «Здоровье человека», М., 1984г Петленко В.П. «Валеология человека», Минск, 1996г Смирнов М.И. «Витамины», М., 1974г https://transferfaktory.ru/vitamin-c https://foxford.ru/wiki/biologiya/vitaminy-v-organizme-cheloveka

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THANK YOU FOR YOUR TIME