EFFECT OF LEAF MATURITY, TEMPERATURE, CARBON DIOXIDE CONCENTRATION, AND LIGHT INTENSITY ON RATE OF PHOTOSYNTHESIS IN CLONAL LINES OF THE LOWBUSH BLUEBERRY, VACCINIUM ANGUSTIFOLIUM AIT. UNDER LABORATORY CONDITIONS

1965 ◽  
Vol 43 (8) ◽  
pp. 893-900 ◽  
Author(s):  
F. R. Forsyth ◽  
I. V. Hall
Keyword(s):  
Carbon Dioxide ◽  
Light Intensity ◽  
Constant Temperature ◽  
Carbon Dioxide Concentration ◽  
Vaccinium Angustifolium ◽  
Leaf Maturity ◽  
Agronomic Characteristics ◽  
Lowbush Blueberry ◽  
Rate Of Photosynthesis ◽  
Clonal Lines

The rate of apparent photosynthesis of the lowbush blueberry was determined in Warburg flasks using Pardee's CO2 buffers. A marked increase in rate of O2 evolution occurred as the temperature was raised from 13.0 to 29.5 °C. With a constant temperature of 25.0 °C the rate of O2 evolution increased as the CO2 concentration increased from 0.2 to 0.8%. The young and middle-aged leaves had a higher rate of apparent photosynthesis than the older leaves. The rate was higher at a light intensity of 1000 ft-c than at 650 ft-c at a CO2 concentration of 0.4%. At the higher light intensity a lowbush blueberry clone selected on the basis of superior agronomic characteristics had a significantly higher rate of apparent pholosynthesis than an average clone.

scholarly journals Design of Intelligent Monitoring System of Chicken House Environment Based on Single-chip Microcomputer

2018 ◽  
Vol 227 ◽  
pp. 02008
Author(s):  
Qing Du ◽  
Yanhua Miao ◽  
Yunhui Zhang
Keyword(s):  
Carbon Dioxide ◽  
Light Intensity ◽  
Real Time ◽  
Monitoring System ◽  
Carbon Dioxide Concentration ◽  
Environmental Parameters ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Intelligent Monitoring ◽  
Chicken House

In view of the problem that some chicken farms are susceptible to various bacteria and viruses due to poor breeding environment, this paper designs a chicken house environmental intelligent monitoring system based on single-chip microcomputer application to improve the chicken house environment. The system adopts STC89C52 single-chip microcomputer as the main control chip. The sensor collects information on the light intensity, temperature and humidity, and carbon dioxide concentration, and controls the exhaust fan and the illumination lamp, and the environmental parameters can be displayed on the display in real time.

Interrelations of photosynthesis and assimilation of elementary nitrogen in a blue-green alga

1960 ◽  
Vol 153 (950) ◽  
pp. 111-127 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Light Intensity ◽  
Nitrogen Assimilation ◽  
Relative Rate ◽  
Nitrogen Concentration ◽  
Carbon Assimilation ◽  
Carbon Dioxide Concentration ◽  
Mechanism Study ◽  
Wide Range ◽  
Elementary Nitrogen

In blue-green algae the hydrogen donors and carbon skeletons required in the fixation of elementary nitrogen may be supplied by the photosynthetic mechanism. Study of the kinetic relationships between the photosynthetic assimilation of carbon and the assimilation of nitrogen into the cell material of Anabaena cylindrica Lemm. has demonstrated correlations between the rates of the two processes consonant with the existence of such biochemical connexions. The effects of light intensity, carbon-dioxide concentration and nitrogen concentration were each studied at four different temperatures by determination of changes in amounts of cell carbon and cell nitrogen in cultures grown for 48 h. Temperature was found to have the most marked differential effect, both low and high temperatures depressing nitrogen assimilation to a greater extent than carbon assimilation. At any given temperature there was a close correlation between the rates of the two processes over a wide range of variation in other factors. Both carbon and nitrogen assimilation were found to be inhibited by relatively low concentrations of carbon dioxide. The rate of carbon assimilation per unit amount of cell nitrogen was found to be related in the usual way to light intensity, but to be reduced at low nitrogen concentrations. The relative rate of nitrogen assimilation was likewise found to be related in the expected way to nitrogen concentration but to increase with light intensity and to be reduced at carbon-dioxide concentrations limiting for carbon assimilation.

A study about effects of photoperiod, light intensity and carbon dioxide concentration on a growth of sea algae cultivation

2017 ◽  
Vol 2017.70 (0) ◽  
pp. 508
Author(s):  
Takuma ISHIWATARI ◽  
Izuru SENAHA ◽  
Kazunari NAGAMATSU ◽  
Satoshi HIGAKI ◽  
Kouhei MATSUBARA
Keyword(s):  
Carbon Dioxide ◽  
Light Intensity ◽  
Carbon Dioxide Concentration ◽  
Algae Cultivation
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