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A Study on Methods of Quantitative Experiments in Teaching Biology

Research Project

Project/Area Number 02680253
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Education on school subjects and activities
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

SHIRAGA Sumiji  HIROSHIMA UNIV. School Education, Professor, 学校教育学部, 教授 (90162768)

Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1992: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1991: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1990: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsQuantitative experiment / Photosynthetic rate / Gas detector / Respiration rate / Germinating seed / Transpiration / 中学校生物実験 / 乾燥重量 / 光合成速度 / 呼吸量測定 / ウキクサ / 蒸散量測定
Research Abstract

The methods of quantitative experiments obtained from this research are as follows: 1) Experiments regarding to the relation between intensity of illumination and photosynthetic rate; (1) Duckweeds are cultivated on the conditions to irradiating with lights of 2,000, 4,000,....and 10,000 Lux. After several days, the increased weight(wet weight) of the duckweeds cultivated on each intensity of illumination are weighted respectively. (2) A leaf put into a closed vessel are irradiated with different intensities of light, and CO_2 quantity absorbed by the leaf for 30 minutes on each condition is measured using a gas detector. 2) Experiments regarding to the relation between temperature and respiration rate; (1) Medaka is put into water kept at temperatures of 5, 10, .... and 30゚C, and the number of respiratory movement of the medaka's operculum per minute is counted at each temperature. (2) Germinating seeds put into a closed vessel are kept at temperatures of 5, 10, .... and 30゚C, and O_2 quantity absorbed by the germinating seeds for five minutes is measured at each temperature. 3) Measurement of the amount of the water lost by transpiration; Water quantity transpirated from leaves of plant for 30 minutes is measured using an electronic balance. Subsequently the area of each leaf is measured using a method converting the weight of the pieces of the thick paper cut as large as each leaf into the areas. Then water quantity lost by the leaf per 100 cm^2, per 60 minutes is measured.

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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