Moisture retention capacity

Use Adds excellent moisture retention capacity and fiber enrichment while being devoid of color. 

In the desiccant bed, the regeneration air carries heat to the desiccant. A sufficient volume of air is required to elevate the desiccant s temperature to the 425° F setpoint in a relatively short time frame. At these elevated temperatures, the moisture-retention capacity of the molecular sieve desiccant is very low (Fig. 7.39). 

Determination of the resistance of finished and unfinished cotton fabrics to the action of soil microflora was carried out by the soil burial test, according to ISO 11721-1 2001 and ISO 11721 2003 standards. In this standard process, a container was filled with commercial grade compost. The water content of the soil was 60 5 % of its maximum moisture retention capacity. It was held constant during the experiment by spraying with water. The pH of the soil was between 4.0 and 7.5. Cotton fabric samples were buried in the soil for periods of 3, 6, 9 and 12 days. After the defined incubation time, the samples were removed from the test soil, lightly rinsed with running tap water and immersed in 70 % ethanol for 30 minutes before air drying. 

Topsoil should have a loose and open structure so that it drains fast to keep the ground surface dry. At the same time, it must be able to retain enough moisture in order that plants growing in it are not constantly subjected to drought stress. The properties of interest include particle gradation, clay content, nutrient content, and retention capacity. 

In a similar investigation Sastry and Fuerstenau (S4) used up to 1.5% Wyoming bentonite in a teconite feed with 48.4, 50.3, and 52.3% volume moisture. The water retention capacity was calculated as 0.47 0.11, independent of the water and bentonite contents. An evaluation of bentonites from three sources by Nicol and Adamiak (N3) indicates that the Wyoming bentonite has the highest cation exchange capacity and also the maximum retardation effect on the balling rate. 

It comes as no surprise, perhaps, that fruit prefers deep, rich loam that is free-draining but moisture-retentive. You may not have these conditions at first, but much can be done to improve soil structure, open up heavy soil, and increase the water-holding capacity of light soil (see The Soil, pp.34-35). If starting with very poor soil, start to improve it a year in advance of planting fruit trees or bushes. 

The residual content of immiscible liquids can be defined by the amount of NAPL remaining in the subsurface when pore geometry permits NAPL flow greater than the retention capacity. In an outdoor pilot experiment. Fine and Yaron (1993) studied the effect of soil constituents and soil moisture contents on the retention of kerosene in the subsurface. This retention is termed the kerosene residual content (KRC). Ten soils were studied, with a broad spectrum of clay and organic matter contents, together with four soil moisture contents corresponding to oven-dried, air-dried. 

Fig. 12.14 Kerosene retention capacity (KRC) as affected by soil type and soil moisture conditions, expressed as volume of kerosene per bulk volume of air-dry soil. Reprinted from Jarsjo J, Destouni G, Yaron B (1994) Retention and volatilization of kerosene laboratory experiments on glacial and postglacial soils. J Contam Hydrol 17 167-185. Copyright 1994 with permission of Elsevier...

The water pick-up and retention capability of the fibres are influenced by the fibre composition and less significantly by variation in draw ratios. The calcium alginate fibres showed reasonable water retention capacity as high as 9.9 times their original we ht The alginates retention of saline solution however, is much less. Saline being identical to serum found in wounds is a better indicator of absorbency in natural wound envirmuneot. The reduced retention or absorbency can be attributed to the presence of the salts in the saline solution. The fibres ability to absorb moisture has obviously been reduced by the salts present in the solution. 

The retention of water in soil depends on the capillary force and the molecular attraction of the particles. As the pores in the soil become thoroughly wetted, the capillary force declines, so that gravity becomes more effective. In this way, downward percolation can continue after infiltration has ceased but the capillarity increases in importance as the soil dries. No further percolation occurs after the capillary and gravity forces are balanced. Thus, water percolates into the zone of saturation when the retention capacity is satisfied. This means that the rains that occur after the deficiency of soil moisture has been catered for are those that count as far as supplementing groundwater is concerned. 

Changes in the water transport rate of treated PET fabrics have been measured by a vertical wicking test in which the rising height of water in a strip of fabric is determined [3, 33, 77], Measurements of the dissipation of a drop of water on fabric [ 11, 38,62], liquid retention capacity (the ratio of the amount of liquid to the dry fabric quantity), and moisture regain (the amount of water a dry fiber absorbs from the air at a defined relative humidity) [43, 44, 51, 60] also aim to determine changes in the water absorption behavior of treated PET fabrics. Incomplete removal of enzymes adsorbed to the PET surface can, however, easily lead to incorrect results obtained using these methods [11, 23, 102]. 

Moisture retension capacity is a very important factor for woimd dressing hydrogels. Thus, moisture retention ability of the hydrogels were measured without cover (Figure 3 (a))... 

Recently, Lin et al. [73] successfully produced microbial cellulose and microbial cellulose/chitosan membranes in large scale. The composite was prepared by immersing microbial cellulose in chitosan solution followed by freeze-drying. The incorporation of chitosan in microbial cellulose (i.e., microbial cellulose/chitosan) led to a more compact fibril network with smaller pore size than microbial cellulose. The swelling behavior, water retention capacity, moisture content, permeability and mechanical properties... 

In many cases, HSI may replace NIR spectrometers to compute concentrations of various compounds or to estimate quality parameters of agricultural and food products. HSI can be used to assess properties as diverse as oil content, moisture, flour yield, softness, sucrose solvent retention capacity, and alpha-amylase activity in grains [26-28] sugar content and maturity of fruits like apple or banana [29-31] drip loss, water-holding capacity, color, pH, and sensory properties of meat [32-39] analysis of mixtures to detect the presence of substances such as, in forages [40], or the concentration of n-3 polyunsaturated fatty acids in designer eggs [41]. 

According to the European Disposables and Nonwoven Association, the tests for polyacrylate S APs include pH, residual monomers, particle size distribution, moisture content, free swelling capacity, centrifuge retention capacity, absorption under pressure, flowrate, density, extractables, respirable particles, and dust. 

Lignin plays an important role in the carbon cycle by sequestering atmospheric carbon into living vegetation. It is one of the components of dead vegetation that will decompose last. The resulting soil humus provides increased cation exchange capacity and expands moisture retention. 

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