통합 검색 | Korea Science

Suh, S.R.;Chung, G.C.;Sung, J.H.;Ryu, Y.S.;Lee, K.H.
- 한국농업기계학회:학술대회논문집
- /
- 한국농업기계학회 2000년도 THE THIRD INTERNATIONAL CONFERENCE ON AGRICULTURAL MACHINERY ENGINEERING. V.III
- /
- pp.736-743
- /
- 2000
This paper represents our efforts to diagnose environmental stresses using physiological instruments in cucumber plants. The stresses could be detected by measuring and analyzing the difference of chlorophyll content, photosynthetic efficiency(Fv/Fm), differential temperature(DT), stomatal resistance and light absorbance values between treated and controlled plants. From the all over experiments, the stresses could be first diagnosed on the 1st to 5th day after treatment and the overall diagnosis rate was estimated at more than 50%.
PDF

Lee, Y.H.;Kim, M.S.;Cho, Y.K.;Cho, D.S.l
- 한국농업기계학회:학술대회논문집
- /
- 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
- /
- pp.344-353
- /
- 1996
A fundamental study was conducted to obtain the basic data involved in nondestructive quality evaluation of the fruit and vegetables. An experimental equipment for ultrasonic propagation characteristics of the fruit and vegetables such as radish , carrot , potato, and apple was set up and also power spectrum analysis system of an ultrasonic wave through the fruit and vegetables was set up. The velocity and attenuation of ultrasonic wave through the tissue specimens from the fruit and vegetables were measured and analyzed. The elastic modulus and density by the mechanical method currently used were compared with those using by ultrasonic method. The ultrasonic tranit time was almost linearly increased with the length of the specimens and attenuation of ultrasonic was mainly affected by the internal flbrous structure of the products. The regression equation was derived from the highly correlated experimental variables.
PDF