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  • Book
    Klaus Reichardt, Luís Carlos Timm.
    Summary: This textbook presents the concepts and processes involved in the soil-plant-atmosphere system as well as its applications in the water cycle in agriculture. Although reaching the frontier of our knowledge in several subjects, each chapter starts at the graduation level and proceeds to the post-doctoral level. Its more complicated subjects, as math and physics, are well explained, even to readers not well acquainted with these tools. Therefore, it helps students read, understand, and developing their thoughts on these subjects. Instructors also find it an easy book with the needed depth to be adopted in courses related to Soil Physics, Agricultural Management, Environmental Protection, Irrigation and Agrometeorology. It serves also as "lexicon" to engineers and lawyers involved in agricultural, environmental cases.

    Contents:
    Chapter 1: Man And The Soil
    Plant
    Atmosphere System.- Chapter 2: Water, The Universal Solvent For Life.- Chapter 3: The Soil As A Water Reservoir For Plants.- Chapter 4: Plant: The Solar Energy Collector.- Chapter 5: Atmosphere: The Fluid Envelope That Covers The Planet Earth.- Chapter 6: The Equilibrium State Of Water In The Systems.- Chapter 7: The Movement Of Water In The Systems.- Chapter 8: Soil Water As A Nutrient Solution.- Chapter 9: Aspects Of The Soil Atmosphere.- Chapter 10: How Heat Is Propagated In The Soil.- Chapter 11: Water Infiltration Into The Soil.- Chapter 12: Water Redistribution After Infiltration Into The Soil.- Chapter 13: Evaporation And Evapotranspiration: The Vapor Losses To The Atmosphere.- Chapter 14: How Do Plants Absorb Soil Water ?.- Chapter 15: The Water Balance In Agricultural And Natural Systems.- Chapter 16: How Plants Absorb Nutrients From The Soil.- Chapter 17: How Soil, Plant And Atmophere Properties Vary In Space And Time In The Spas: An Approach To Geoestatistics.- Chapter 18: Spatial And Temporal Variability Of Spas Attributes: Analysis Of Spatial And Temporal Series.- Index.
    Digital Access Springer 2020
  • Article
    Coceani F, Bodach E, White E, Bishai I, Olley PM.
    Prostaglandins. 1978 Apr;15(4):551-6.
    Prostaglandin (PG) I2 and its stable metabolite, 6-keto-PGF1alpha, were tested on the isolated ductus arteriosus from mature fetal lambs. PGI2 relaxed the ductus in high doses (threshold 10(-6)M) and its activity disappeared on standing at room temperature for 30 minutes. 6-keto-PGF1alpha was inactive at all doses. By contrast, PGE2 produced a dose-dependent relaxation over a range between 10(-10) and 10(-6)M. These findings confirm that PGE2 is the most potent ductal relaxant among the known derivatives of arachidonic acid. PGE2 probably maintains ductus patency in the fetus and, together with PGE1, remains the compound of choice in the management of newborns requiring a viable ductus for survival.
    Digital Access Access Options