Results 251 to 260 of about 1,593,267 (308)

Secondary Treatment Alternatives: Suspended Growth

Journal of the Environmental Engineering Division, 1979
The modifications of conventional activated sludge capable of producing secondary effluent when followed by properly designed sedimentation units include extended aeration, oxidation ditches, pure oxygen activated sludge, contact stabilization, and step aeration. The activated biofilter process, which combines a trickling filter with an aeration basin,
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Secondary Precipitate Growth in Mg-PSZ

Key Engineering Materials, 1991
Magnesia Partially Stabilised Zirconia (Mg-PSZ) is a transformation toughening ceramic with fracture toughness values well above those of traditional ceramic materials. Toughening is achieved by precipitation of the metastable tetragonal phase within the cubic ZrO2-MgO matrix and the growth of these precipitates to a size at which they will transform ...
Hay, S., Nairn, J. D., St. John, D. H.
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Fixed-Growth Nitrification of Secondary Effluent

Journal of the Environmental Engineering Division, 1978
A downflow submerged-bed, fixed-growth nitrification process has been successfully applied to the effluents of an activated sludge process and an independent physical-chemical treatment process. The empty-bed detention time, gas/water ratio, backwashing frequency, water temperature, supporting medium, and the ammonia limit in the nitrified effluent are
James A. Gasser, Ching-lin Chen, Robert P. Miele   +2 more
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Metropolitan growth and secondary cities development policy

Habitat International, 1986
Most east and south Asian countries will likely experience ongoing urbanization. Approximately 93 million people will be added to the populations of Asian cities over the next 15 years and more than 40% of all Asians are expected to be living in urban centers by the year 2000. Much of the population growth will occur in the largest metropolitan areas.
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MicroRNA257 promotes secondary growth in hybrid poplar

Plant Physiology and Biochemistry
Populus, a significant fast-growing tree species with global afforestation and energy potential, holds considerable economic value. The abundant production of secondary xylem by trees, which serves as a vital resource for industrial purposes and human sustenance, necessitates the orchestration of various regulatory mechanisms, encompassing ...
Yayu Guo, Shuhang He, Hou-Ling Wang, Hongxia Lin, Yuqian Zhang, Yuanyuan Zhao   +5 more
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Bioinactive Growth Hormone and Secondary Growth Hormone Deficiency

1986
It is now well established that a significant number of growth-impaired children respond to treatment with replacement doses of growth hormone (GH).(1–4) These patients, who were formerly thought to have either constitutional delay or familial short stature, are presently included in a new syndrome called the “normal variant short stature” or “GH ...
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Secondary Grain Growth in Thin Films

MRS Proceedings, 1985
AbstractNormal grain growth in thin films leads to columnar grains with sizes roughly equal to the film thickness. In subsequent grain growth, a minor fraction of the grains continue to grow at appreciable rates, leading initially to a bimodal grain size distribution and ultimately to a monomodal distribution of grains with sizes much larger than the ...
C. V. Thompson, Henry I. Smith
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Secondary recrystallization or normal grain growth?

Acta Metallurgica et Materialia, 1994
Abstract The grain growth process in the presence of pinning force was investigated by computer simulation. The pinning force was assumed to change its value from high to low, these changes being proceeded at different rates. The initial value of the pinning force was chosen in such a way that the changes of the average grain size were suppressed. It
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Green Growth of the Secondary Industry

2012
The secondary industry has already scored notable achievements since the reform and opening-up in China. However, surging energy prices and worsening environmental quality has brought new challenges to the green growth of the secondary industry. This chapter, based on the features of the secondary industry’s green growth and its existing problems ...
Jiangxue Zhang, Hongli Ma, Xiwei Wang
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Cambial Variants (Anomalous Secondary Growth)

1988
“Anomalous secondary growth” is the term under which have been grouped cambial conformations, cambial products, and cambial numbers which differ from the most common “normal” condition, namely, a single cylindrical cambium that produces phloem externally and xylem internally. The term “variants” is employed here as a way of referring to the less common
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