Additional conductivity stimulated by X-rays in organic liquid photo conductors III. Combined effect of light and X-rays

1969 ◽  
Vol 12 (6) ◽  
pp. 755-758
Author(s):  
V. M. Koval' ◽  
Yu. A. Kopylov ◽  
T. N. Trofimova ◽  
L. A. Svergunenko
Keyword(s):  
Organic Liquid ◽  
Combined Effect ◽  
X Rays ◽  
Additional Conductivity ◽  
Effect Of Light

scholarly journals PHOTOKINESIS AND TONIC EFFECT OF LIGHT IN UNIONICOLA

1932 ◽  
Vol 16 (2) ◽  
pp. 349-355 ◽  
Author(s):  
John H. Welsh
Keyword(s):  
Light Intensity ◽  
Simple Relation ◽  
Combined Effect ◽  
Direct Proportion ◽  
Water Mite ◽  
Locomotor Muscles ◽  
Leg Movement ◽  
Changing Light ◽  
Effect Of Light

1. The speed of progression of Unionicola, a water mite, is influenced by light; and over a certain range increases as a function of the light intensity. 2. The relation between speed and light intensity is not a simple one, as the speed of progression is due to the combined effect of amplitude of steps and frequency of leg movement. 3. The amplitude of stride increases in direct proportion to the logarithm of the light intensity, while the frequency of stepping has no such simple relation to intensity. 4. The change in length of stride with changing light intensity indicates a tonic effect of light on the locomotor muscles. Such an effect has been observed previously in studies of orientation, due to unequal illumination, which produces changes in posture.

scholarly journals Combined Effect of Light and Temperature on the Production of Saxitoxins in Cylindrospermopsis raciborskii Strains

Toxins ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 38 ◽  
Author(s):  
Marcella Mesquita ◽  
Miquel Lürling ◽  
Fabiane Dorr ◽  
Ernani Pinto ◽  
Marcelo Marinho
Keyword(s):  
Maximum Growth ◽  
Combined Effect ◽  
Cylindrospermopsis Raciborskii ◽  
Tropical Regions ◽  
Batch Cultures ◽  
Light Intensities ◽  
Cell Quota ◽  
Wide Range ◽  
Lower Light ◽  
Effect Of Light

Cylindrospermopsis raciborskii is a potentially toxic freshwater cyanobacterium that can tolerate a wide range of light and temperature. Due to climatic changes, the interaction between light and temperature is studied in aquatic systems, but no study has addressed the effect of both variables on the saxitoxins production. This study evaluated the combined effect of light and temperature on saxitoxins production and cellular quota in C. raciborskii. Experiments were performed with three C. raciborskii strains in batch cultures under six light intensities (10, 40, 60, 100, 150, and 500 μmol of photons m−2 s−1) and four temperatures (15, 20, 25, and 30 °C). The growth of C. raciborskii strains was limited at lower temperatures and the maximum growth rates were obtained under higher light combined with temperatures equal or above 20 °C, depending on the strain. In general, growth was highest at 30 °C at the lower light intensities and equally high at 25 °C and 30 °C under higher light. Highest saxitoxins concentration and cell-quota occurred at 25 °C under high light intensities, but were much lower at 30 °C. Hence, increased temperatures combined with sufficient light will lead to higher C. raciborskii biomass, but blooms could become less toxic in tropical regions.

Combined effect of light intensity and temperature on the magnetic resonance linewidth in alkali vapor cell with buffer gas

2017 ◽  
Vol 26 (6) ◽  
pp. 067801 ◽  
Author(s):  
Yang Gao ◽  
Hai-Feng Dong ◽  
Xiang Wang ◽  
Xiao-Fei Wang ◽  
Ling-Xiao Yin
Keyword(s):  
Magnetic Resonance ◽  
Light Intensity ◽  
Combined Effect ◽  
Buffer Gas ◽  
Vapor Cell ◽  
Resonance Linewidth ◽  
Effect Of Light

scholarly journals The effects of light and temperature on microalgal growth and nutrient removal: an experimental and mathematical approach

RSC Advances ◽  
2016 ◽  
Vol 6 (27) ◽  
pp. 22896-22907 ◽  
Author(s):  
Ana L. Gonçalves ◽  
José C. M. Pires ◽  
Manuel Simões
Keyword(s):  
Mathematical Model ◽  
Nutrient Removal ◽  
Combined Effect ◽  
Mathematical Approach ◽  
Effect Of Light

A mathematical model describing the combined effect of light and temperature on microalgal growth was developed.

POSTSTORAGE EFFECT OF LIGHT, TEMPERATURE AND NUTRIENT SPRAY TREATMENTS ON CHLOROPHYLL DEVELOPMENT IN CABBAGE

1982 ◽  
Vol 62 (4) ◽  
pp. 1023-1026 ◽  
Author(s):  
PETER W. PERRIN
Keyword(s):  
Elevated Temperature ◽  
Chlorophyll Content ◽  
Combined Effect ◽  
Effect Of Light

After 4 mo of storage, two trimmed cabbage cultivars received temperature, light and nutrient spray treatments. Analyses showed that the combined effect of elevated temperature and illumination increased chlorophyll substantially while nutrient sprays produced a smaller effect. Although the cultivars differed in initial chlorophyll content, they responded similarly to the treatments.

The Rutherford Memorial Lecture, New Zealand, 1982 - Rutherford, radio and opto-electronics

1984 ◽  
Vol 393 (1805) ◽  
pp. 193-214 ◽  
Keyword(s):  
New Zealand ◽  
Memorial Lecture ◽  
X Rays ◽  
Cavendish Laboratory ◽  
Transmission Of Information ◽  
Cathode Ray Tube ◽  
Electrical Effect ◽  
Initial Work ◽  
Personal Reflections ◽  
Effect Of Light

The paper contains some personal reflections on Rutherford as a scientist and as a person. It describes his remarkable initial work on radio in Canterbury College, Christchurch, New Zealand, after the work of Hertz, which was then continued in the Cavendish Laboratory, Cambridge. It is likely that Rutherford was ahead of Marconi in 1895. Here also he used the photo-emissive effect (discovered by Hertz) in his work with J. J. Thomson. He then switched in 1897 to X-rays and radioactivity. The paper then returns to the origin of opto-electronics by the dis­covery of the electrical effect of light by E. Becquerel in 1839 ( C. r. hebd. Séanc. Acad. Sci., Paris 9, 145; 561). The development of transmission of information by electrical signals over wires which led to Bell’s telephone in 1876 is outlined, and the discovery of the photo-conductive effect in 1873, which led to an outburst of ideas for television and the first real demonstration by Ayrton & Perry in 1880 ( Jl B. Soc. Arts 29, 468). H ertz’s two discoveries (used by Rutherford), the discovery of the electron by J. J. Thomson, and the invention of the Braun tube in 1897 gave a great boost to the idea of television. The major idea that came from A. A. Campbell Swinton in about 1903 was that the cathode ray tube was the key to successful television. This was published in the epochmaking note in Nature, Lond . in 1908 which laid the foundation for modern television.

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