Packing ratio

Table 36-2. The packing ratios of each of the orders of DNA structure.

The packing ratio also explains the nature of microemulsion formed by using nonionic surfactants. If v/a 1 increases with increase of temperature (as a result of reduction of a ), one would expect the solubilisation of hydrocarbons in nonionic surfactact to increase with temperature as observed, until v/a l reaches the value of 1 where phase inversion would be expected. At higher temperatures, va l > 1 and water in oil microemulsions would be expected and the solubilisation of water would decrease as the temperature rises again as expected. 

The theory behind the method to measure the burning rate was not explicitly presented by Lamb et al. Obviously, the mathematical model must be based on the bed properties, such as packing ratio, loading density, bed height, as well as the trolley speed. No discussion is presented about the limitations and assumptions of the method. 

Lamb et al (1977) crosscurrent moving packing ratio, bed density, hb Uif no information No No... 

Daban, J.R. (2000) Physical constraints in the condensation of eukaryotic chromosomes. Local concentration of DNA versus linear packing ratio in higher order chromatin structures. Biochemistry 39, 3861-3866. 

Surfactants not only aggregate to spherical micelles but also form cylinders, bilayers, inverted micelles, etc. [524], The type of aggregate structure formed depends on different factors. An important factor is the so-called surfactant parameter, also referred to as the packing ratio [533] ... 

The chromosomal DNA is complexed with five types of histone (HI, H2A, H2B, H3 and H4). These are very basic proteins, rich in arginine and lysine. The amino acid sequences of histones are highly conserved in evolution. The DNA is wound round a histone octamer (two molecules each of H2A, H2B, H3 and H4) to form a nucleosome. The DNA between neighboring nucleosomes (linker DNA) binds histone HI. The packing ratio of nucleosomes is about 7. 

Nucleosomes are organized into a 30 nm fiber, possibly by forming a higher order helix called a solenoid. The overall packing ratio is about 40. 

Keywords wood-chip concrete, recycling of used timber, special cement paste, injection method of cement paste, wood-chip packing ratio, strength, specific gravity, thermal conductivity... 

Photo. 2 (image) The cross-section of specimens with different packing ratio of wood-chip (white part is constituted of cement paste)... 

Water cement ratio 30% Packing ratio of wood-chip in volume 40% 50% 60% ... 

Fig. 5 Packing ratio of wood-chip vs. bending strength of wood-chip concrete...

The relationship between the packing ratio of wood-chip and the bending strength of wood-chip concrete is shown in Fig. 5. At the age of 3 days and 7 days, the bending strength decreases linearly when the packing ratio is increased. 

The compressive static modulus of elasticity is shown in Table 4. The static modulus decreases when water cement ratio is increased, and the static modulus increases when the packing ratio of wood-chip is decreased. 

The coefficient of linear thermal expansion of wood-chip concrete was measured by the push rod meter at JTCCM. The result of measurement is shown in Table 6. Because of the influence of moisture content, the coefficient of linear thermal expansion are different with the temperature range below and over 40°C. Within the range of -8 40°C, when the packing ratio of wood-chip is increased, the coefficient of linear thermal expansion increases. 

Temperature range(°C) 30 Packing ratio of wood-chip (Vol.%) 40 50 60 ... 

The wood-chip concrete with the packing ratio of 50, 60% and water cement ratio of 0.50, 0.60 can be sawed by a handy saw. 

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