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  • 1
    Electronic Resource
    Electronic Resource
    A review and integrating analysis of Spatially-Variable Control of crop production (1992)
    Springer
    Nutrient cycling in agroecosystems 33 (1992), S. 1-34 
    Details
    ISSN: 1573-0867
    Keywords: Automatic control ; fertilizer application ; geographic information systems ; sensors ; sitespecific ; spatially-variable ; variability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The variability of crops, soils, and pests within crop production fields has led to attempts to understand those variations and to manage crop production accordingly. The rapidly expanding research and development on the management and control of crop production according to in-field variations is reviewed. The various stages and components of this spatially-variable control are classified and presented along with a proposed terminology and notation. Advances in component technologies (sensors, actuators, locators, geostatistics, geographic information systems) and their integration should reduce crop production costs and be environmentally advantageous.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01058007
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  • 2
    Electronic Resource
    Electronic Resource
    Stress signaling in yeast (1995)
    New York, NY : Wiley-Blackwell
    BioEssays 17 (1995), S. 959-965 
    Details
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: In the yeast Saccharomyces cerevisiae three positive transcriptional control elements are activated by stress conditions: heat shock elements (HSEs), stress response elements (STREs) and AP-1 responsive elements (AREs). HSEs bind heat shock transcription factor (HSF), which is activated by stress conditions causing accumulation of abnormal proteins. STREs mediate transcriptional activation by multiple stress conditions. They are controlled by high osmolarity via the HOG signal pathway, which comprises a MAP kinase module and a two-component system homologous to prokaryotic signal transducers. AREs bind the transcription factor Yap1p. The three types of control elements seem to have overlapping, but distinct functions. Some stress proteins encoded by HSE-regulated genes are necessary for growth of yeast under moderate stress, products of STRE-activated genes appear to be important for survival under severe stress and ARE-controlled genes may mainly function during oxidative stress and in the response to toxic conditions, such as caused by heavy metal ions.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bies.950171109
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