The effects of normal caffeine doses on qualitative responses of students

Abdollahi, Yosef and Massoumi, Lotfali and Ganji, Masoud (2010) The effects of normal caffeine doses on qualitative responses of students. Other thesis, University of Mohaghegh Ardabili.

[img] Text

Download (1MB)
Official URL:


Caffeine is found in different sources such as tea, coffee, Cola and in some kind of drugs. Caffeine is one of the most widely consumed stimulant drugs of the modern world. Also In our country, different ways of consumption of caffeine is increasing. For this reason, the scientific community is interested in this area for more researches. In this study commercial coffee, as a source of caffeine, was selected and its effect on the quality of response and reaction time were evaluated. First for this purpose, the amount of caffeine in coffee was determined through HPLC. Then reaction time and quality of response for five doses (1,2,3,4and 5 mgkg-1 body weight, in amount terms of caffeine in coffee),were tested on two age categories (youth and middle age) that each categories contained 5 different groups. Results of data analyses by using t-student method showed that the minimum dose of caffeine required for significant reduction in reaction time among the young subjects is 3mgkg-1 but the maximum reduction of reaction time caused by 4mgkg-1 of caffeine. It also revealed that the quality of response improved only at low doses of caffeine (1, 2 mgkg-1), but in other doses, there was no significant effect in this case. Among middle age only low doses of caffeine (1, 2 mgkg-1) were effective on the quality of response. At least required caffeine for significant change in reaction time among the middle age was 4mgkg-1. In spite of the changes in quality of response by caffeine consumption in both age categories, it was more tangible among the middle age group. Instead, it seems that reaction time among young people, compared with the middle age, is more affected by caffeine.

Item Type: Thesis (Other)
Persian Title: تاثيردوزهاي نرمال کافئين درکيفيت پاسخها ي دانشجويان
Persian Abstract: کافئين که درترکيبات مختلفي مانند چاي ،قهوه،کولا وبعضي از داروهاي مختلف وجوددارد شايد بيشترين ماده مصرف شده ازلحاظ فارماکولوژيکي درجهان باشد. در کشور ما نيز استفاده از آن به شکلهاي مختلف روبه افزايش است براي همين جوامع علمي بيشتري به تحقيق در اين زمينه علاقمند هستند.دراين تحقيق نيز يکي ازانواع قهوه هاي تجاري به عنوان منبعي از کافئين خوراکي انتخاب واثرآن روي کيفيت پاسخ دهي و زمان راکسيون افراد مورد بررسي قرارگرفت . براي اين منظور ابتدا ميزان کافئين موجوددرقهوه منتخب ازطريق HPLC مشخص گرديد وسپس زمان راکسيون وکيفيت پاسخ دهي براساس ميزان کافئين موجود درقهوه، در دوزهاي (1,2,3,4,5 mg/kg) روي دو رده سني مختلف(جوانان وميانسالان) مورد مطالعه قرار گرفت . هر يک از گروههاي سني در پنج گروه و بر اساس دوزهاي ذکر شده مورد آزمون قرارگرفتند .آناليزنتايج به روش t- جفت شده نشان دادکه حداقل کافئين مورد نيازبراي کاهش معني دار زمان راکسيون در بين جوانان دوز 3mg/kg مي باشدوبهترين تاثير يا بعبارت ديگر بيشترين کاهش زمان راکسيون مربوط به دوز 4 ميلي گرمي بود . همچنين مشخص شدکه کيفيت پاسخ دهي در گروه سني جوانان دردوزهاي (1, 2mg/kg)بهبود مي يابد ودوزهاي ديگر تاثير معني داري دراين موردنداشتند.درميانسالان نيز دوزهاي ( 1, 2mg/kg) روي کيفيت پاسخ دهي موثر بودند وبقيه دوزها، اثرمعني داري دراين موردنداشتند.حداقل کافئين لازم براي تغييرمعني دارزمان راکسيون دربين ميانسالان نير 4mg/kg معين شد.بررسي تغييرات مربوط به کيفيت پاسخ دهي وزمان راکسيون در دو رده سني نشان دادکه هرچند درهردو گروه سني ،دوزهاي پايين کافئين، روي کيفيت پاسخ دهي اثر دارند ولي اين تاثيردربين ميانسالان محسوس تر است.درعوض به نظر مي آيدکه درجوانان در مقايسه با ميانسالان زمان راکسيون بيشتر تحت تاثير کافئين قرار مي گيرد .
Massoumi, LotfaliUNSPECIFIED
Subjects: Faculty of Basic Sciences > Department of Biology
Divisions > Faculty of Basic Sciences > Department of Biology
Divisions: Subjects > Faculty of Basic Sciences > Department of Biology
Faculty of Basic Sciences > Department of Biology
Date Deposited: 13 Jul 2019 08:11
Last Modified: 13 Jul 2019 08:11

Actions (login required)

View Item View Item