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Start Over Coverage 465-473

1. Hydro-potential utilization of cooling water on the hydro-electric power plant Dalešice

Creator:
Hudec, Martin, Haluza, Miloslav, and Kubálek, Jiří
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
renewable energy, turbine, and cooling water
Language:
English
Description:
Engineering solution of a surplus pressure head in a system of reversible machine unit's cooling water. Current technologies suppplemented with Francis turbine or more precisely a centrifugal volute-type pump in turbine mode. It contains the layout for the basic extent of several various high-speeds with regard to maximum coverage of working conditions. Minimization of construction works on the structure of the cooling water inlet. Furthermore it includes an assignment of the annual power production.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Hypobaria and hypoxia affects phytochemical production, gas exchange, and growth of lettuce

Creator:
He, C., Jacobo-Velázquez, D. A., Cisneros-Zevallos, L., and Davies, F. T.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
fotosyntéza, photosynthesis, bioprotectants, carbon assimilation, chlorophyll content, dark respiration rate, Lactuca sativa, low pressure, oxygen radical absorbance capacity, phytochemicals, 2, and 581
Language:
Multiple languages
Description:
Hypobaria (low total atmospheric pressure) is essential in sustainable, energy-efficient plant production systems for long-term space exploration and human habitation on the Moon and Mars. There are also critical engineering, safety, and materials handling advantages of growing plants under hypobaria, including reduced atmospheric leakage from extraterrestrial base environments. The potential for producing crops under hypobaria and manipulating hypoxia (low oxygen stress) to increase health-promoting bioactive compounds is not well characterized. Here we showed that hypobaric-grown lettuce plants (25 kPa ≈ 25% of normal pressure) exposed to hypoxia (6 kPa pO2 ≈ 29% of normal pO2) during the final 3 d of the production cycle had enhanced antioxidant activity, increased synthesis of anthocyananins, phenolics, and carotenoids without reduction of photosynthesis or plant biomass. Net photosynthetic rate (PN) was not affected by total pressure. However, 10 d of hypoxia reduced PN, dark respiration rate (RD), PN/RD ratio, and plant biomass. Growing plants under hypobaria and manipulating hypoxia during crop production to enhance health-promoting bioactive compounds is important for the health and well-being of astronauts exposed to space radiation and other stresses during long-term habitation. and C. He ... [et al.].
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public