Mixing ratio

It has been reported that block copolymers with appropriately chosen partners and mixing ratios yield materials suitable for use in substrate disks for optical data storage. An example is polyarjiate—polystyrene block copolymer with a PS content between 40 and 60% (225). 

This aqueous alkaline remover is used for stripping the finish from wood or ferrous metals at a mix ratio of 30—600 g/L (0.25—5 lbs/gal). 

Solvent Mixing ratio Solution viscosity - 20°C (mPa s) Tack time (min)... 

Thermocouples are primarily based on the Seebeck effect In an open circuit, consisting of two wires of different materials joined together at one end, an electromotive force (voltage) is generated between the free wire ends when subject to a temperature gradient. Because the voltage is dependent on the temperature difference between the wires (measurement) junction and the free (reference) ends, the system can be used for temperature measurement. Before modern electronic developments, a real reference temperature, for example, a water-ice bath, was used for the reference end of the thermocouple circuit. This is not necessary today, as the reference can be obtained electronically. Thermocouple material pairs, their temperature-electromotive forces, and tolerances are standardized. The standards are close to each other but not identical. The most common base-metal pairs are iron-constantan (type J), chomel-alumel (type K), and copper-constantan (type T). Noble-metal thermocouples (types S, R, and B) are made of platinum and rhodium in different mixing ratios. 

Dual duct unit An air terminal unit assembly consisting of two-ducted air inlets and a means of automatically adjusting the mixing ratio of the two air streams. 

A multisolvent system ean be adapted to aehieve the GPC elution mode. Figures 6.30 and 6.31 (page 206) show how to aehieve GPC elution by ehanging the mixing ratio of ehloroform and methanol in the analysis of Epikote 1001. 

Expt. no. Combination of solvents Mixing ratio (w/w) Refractive index Color change with pressure Before After Piezo- chromism... 

The changes in UV-absorbance with a mixed ratio of mixtures of the present model compounds are shown in Fig. 2. 

This you cannot do in an adiabatic reactor unless you go to extremely high mixing ratios of fresh feed and recycle gas. In summary, it is a question of selectivity, which is the reason for using the isothermal reactor for Fischer-Tropsch. An adiabatic reactor with a waste heat boiler is cheaper than an isothermal feactor, and hence it is used for methanation. 

FIG. 2 Krafft points 7" of hqucous surfactant solutions vs. mixing ratio of c16/c, a-ester sulfonates. (From Ref. 58.)... 

Fig. 11-6 Concentrations of gases in the smoke from an experimental fire of Trachypogon grass from Venezuela as a function of time and the stack gas temperature. The dotted line separates the flaming phase from the smoldering phase. Concentrations are in percent by volume for CO2, in volume mixing ratios (ppm) for the other species (1% = 10000 ppm). (Used with permission from Crutzen and Andreae (1990). Science 250 1669-1678, AAAS.)...

Due to the imbalance of sources and sinks, atmospheric N2O is increasing by 3 Tg N/yr or 0.2%/yr. Figure 12-9 shows average N2O mixing ratios from four stations in the NOAA-CMDL network, Barrow, Mauna Loa, Samoa, and the South Pole (data are from the NOAA-CMDL and can be obtained from www.cmdl.noaa.gov). The most recent IPCC estimate gives a total N2O source of 16 Tg N, 7 Tg of which are a result of human activities (IPCC, 1997). The largest contribution to the anthropogenic N2O sources is 3 Tg N from... 

Assuming the current emissions and sinks remain about the same, estimate the global atmospheric CO2 mixing ratio in the year 2050. Now repeat this calculation, but this time assume that the terrestrial biosphere no longer continues to sequester some of this anthropogenic carbon. 

Fig. 2 shows the liquid product distributions over catalysts. Main product over ferrierite is C5 hydrocarbon, while products were distributed over mainly C,-C, over HZSM-5. Table 4 shows the effect of mixing ratio on product distribution. While HZSM-5/PP ratio does not affect product distribution, higher amount of gas is obtained with increasing ferrierite/PP ratio. This is ascribed to the increased possibility of polypropylene diffusion into pore as the amount of ferrierite is increased. 

The peroxidase-catalyzed polymerization of m-alkyl substituted phenols in aqueous methanol produced soluble phenolic polymers. The mixed ratio of buffer and methanol greatly affected the yields and the molecular weight of the polymer. The enzyme source greatly affected the polymerization pattern of m-substituted monomers. Using SBP catalyst, the polymer yield increased as a function of the bulkiness of the substituent, whereas the opposite tendency was observed when HRP was the catalyst. 

They assumed that the mobilities of the dissociated species LL and K, wf and respectively, are independent of composition. They have applied this model to (Li, Cs)Cl using three experimental values, which are M[(0), uj 1), and M i( X 2) = 2 (X 2) at the Chemla crossing point. Since the calculated isotherms deviate considerably from the experimental ones, they suppose that the dependence of and K2 on the mixing ratio must be assumed. 

The REE pattern for anhydrite is different from that of seawater, indicating that anhydrite did not precipitate due to the simple heating of seawater that was suggested by Sakai et al. (1970) and Sato (1973). This REE pattern could be explained in terms of the mixing of hydrothermal solution and cold seawater and low degree of seawater/hydrothermal solution mixing ratio (Shikazono et al., 1983). 

Figure 1.49. Change of the strontium content and Sr/ Sr ratio of Kuroko anhydrite during the deposition and dissolution due to the mixing of hot ascending solution and cold solution (normal seawater) (Shikazono et al., 1983). R mixing ratio (in weight) = S.W./(S.W.+H.S.) in which S.W. and H.S. are seawater and hydrothermal solution, respectively. Open triangle Fukazawa deposits. Solid triangle Hanawa deposits. Open square Wanibuchi deposits. Solid square Shakanai deposits. Concentration of Ca, Sr " " and SO of H.S. are assumed to be 1,(XX) ppm, 1 ppm, and 10 mol/kg H2O, respectively. Concentrations of Ca, Sr " and SO of S.W. are taken to be 412 ppm, 8 ppm, and 2,712 ppm. Temperatures of H.S. and S.W. are assumed to be 350°C and 5°C (Shikazono et al., 1983).

Barite precipitation highly depends on SO and Ba " concentrations in the fluids. That means that the mixing ratio of hydrothermal solution and seawater is also an important factor for the precipitation of barite, together with the factors mentioned above. 

---