protecting the marine environment

major chronic inshore marine pollution problems can often be attributed to the local discharge of large volumes of wastes. these include materials which are partially biodegradable, such as raw sewage, sewage sludge, food and beverage processing wastes, pulp and paper mill effluents, woolen and cotton mill wastes, and sugar refinery efflu..

experiences in the investigation of contaminated land

this paper indicates a logical approach towards the investigation of contaminated land and gives four examples of its application. the four sites indicated are: a cotton bleach/dye works; a refuse disposal site; a site used for storage and distribution of petroleum products; and a site formerly used by a company engaged in the recovery of..

economics and groundwater, proceedings of a session held in conjunction with the asce national convention

the volume contains five papers presented at the meeting subjects covered include economics of groundwater pumping level statutes, san joaquin valley hydrologic-economic model, groundwater economics in the san joaquin valley, groundwater basic storage in southern callifornia, and economics and water savings of drip irrigated cotton. techn..

estimation of the composition of edible oil mixtures

the fatty acid, sterol and tocopherol contents of edible oils were used to determine the composition of oil mixtures by means of a weighted least squares estimator with backwards elimination. the model was tested on 93 samples containing known amounts of sunflowerseed oil, groundnut oil, soybean oil, cottonseed oil, maize oil, olive oil a..

interply adhesion and blistering of bituminous built-up roofing membranes

stresses in built-up roofing membranes are caused by differential movements due to loads, temperature variations, and moisture changes. if excessive over a period of time, they cause premature failure of the membrane, the most common symptom being blistering and interply separation. the effect of moisture and applied pressure on the inter..

high-resolution solid-state **1**3c-nmr spectroscopy of cellulose nitrates

solid-state **1**3c-nmr spectroscopy has been used to investigate the structure of cellulose nitrates prepared from cotton linters. the solid-state technique has the advantage that the entire range of substitution can be studied, which is not possible at present by solution methods. the spectra change progressively with increasing degree ..

conductivity and water sorption in paper

under equilibrium conditions the dependence of the electrical conductivity of cotton cellulose (whatman 42 ashless filter paper) on moisture content was of an exponential type up to 3. 5. the transient conductivity of paper undergoing water sorption has been measured concurrently with the transient moisture content. the transient conducti..

screening to identify chemical markers of plant resistance to pests and plant stress

plants can express resistance to pests by biosynthesizing allelochemicals. they may be normally present, or their biosynthesis may be elicited or enhanced by injury. this work was initiated to develop a more rapid, integrated approach to identify chemicals that are responsible for resistance to pests, or that are associated with stress. i..

egyptian-dutch advisory panel on land drainage: its activities and impact

the drainage system being installed in egypt is a composite system. its main features are: the laterals are 8 cm in diameter and some 200 m long. they are laid at supplemented of between 1. 20 and 1. 50 m and at spacings of between 40 and 60 m; the collectors are concrete pipes with diameters of between 15 and 40 cm; the maximum depth of ..

spectral response of a plant canopy with different soil backgrounds

the spectral behavior of a cotton canoy with four soil types alternately inserted underneath was examined at various levels of vegetation density. measured composite spectra, representing various mixtures of vegetation with different soil backgrounds, were compared with existing measures of greenness, including the nir-red band ratios, th..