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Start Over Coverage 251-255

1. Influence of potassium nutrition on gas exchange characteristics and water relations in cotton (Gossypium hirsutum L.)

Creator:
Pervez, H., Ashraf, M., and Makhdum, M. I.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
net photosynthetic rate, osmotic potential, pressure potential, stomatal conductance, transpiration ate, and water-use efficiency
Language:
Multiple languages
Description:
The effects of potassium nutrition [0, 6.25, 12.50, 25.00 g(K) m-2 of K2SO4 or KCl] on gas exchange characteristics and water relations in four cultivars (CIM-448, CIM-1100, Karishma, S-12) of cotton were assessed under an arid environment. Net photosynthetic rate (PN) and transpiration rate (E) increased with increased K supply. The leaf pressure potential (Ψp) increased significantly by the addition of 25.00 g(K) m-2 compared to zero K level. The water use efficiency (PN/E) was improved by 24.6 % under the highest K dose compared to zero K. There were positive correlations (0.99**, 0.98**, 0.95**, 0.97**) between K-doses and PN, E, Ψp, and PN/E, respectively. and H. Pervez, M. Ashraf, M. I. Makhdum.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Photosynthetic pathway types in grassland plant species from Northeast China

Creator:
Redmann, R.E., Yin, Lijuan, and Wang, Ping
Format:
print
Type:
model:internalpart and TEXT
Subject:
carbon isotope ratio, 813C, grassland, C4, and C3
Language:
Multiple languages
Description:
Photosynthetic pathway type, based on 5*^C measurements, was determined for 48 species in 39 genera and 15 families of flowering plants from the grassiand region of Northeast China. Of this total, 10 species in 10 genera from 4 families were found to háve C4 photosynthesis; 38 species in 29 genera from 13 families had C3 photosynthesis. One C4 species in the Chenopodiaceae and three in the Gramineae had not been previously docnmented in the literatuře. The C4 species were most frequent in disturbed habitats, meadow steppe and šalině grassiand; C3 species dominated the other habitats sampled.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Využití digitální kamery pro měření změn barevnosti během výroby polymerního regranulátu

Creator:
Navrátil, Milan, Křesálek, Vojtěch, and Botek, Martin
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
measurement, chromaticity, digital camera, regranulate, Matlab, měření, barevnost, digitální kamera, regranulát, and MATLAB
Language:
Czech
Description:
This work deals with the design and realization of measuring device for the measurement of color changes during the production of polymer granulates. As a color sensor LifeCam Studio webcam is used here. User measurement application created in MATLAB programming environment is described and some results of measurement on selected samples of granulate are shown in order to verify the functionality of the device. Problem of regranulate colour measurement lies in big amount of formed cavities. Study of their impact on measured results leads to necessity of new algorithms during data processing. and Práce se zabývá návrhem a realizací měřicího přípravku pro měření změn barevnosti během výroby polymerních regranulátů. Jako senzor barevnosti je použita webová kamera LifeCam Studio. Je popsána i uživatelská měřicí aplikace vytvořená v programovacím prostředí MATLAB a publikovány výsledky měření na vybraných vzorcích regranulátu za účelem ověření funkčnosti zařízení. Problém měření barevnosti granulátu spočívá ve velkém množství vytvořených dutin. Studium jejich vlivu na výsledky měření vede k nutnosti tvorby nových algoritmů při zpracování naměřených dat.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public