Liquid level measurement performance data

Thus, by simply measuring t, the kinematic viscosity v = q/p of any low-viscosity Newtonian liquid can be determined. It is important to note that because the lower bulb contains liquid during the measnrement, h depends on the liquid level in both arms of the viscometer. Calibration experiments must therefore be performed with the same initial head of liquid as the actual measuranents to yield accurate results. In practice, Equation 7.17 leads to small but systanatic errors in viscosity data, particularly for low viscosity liquids. The source of errors can be traced to omission of the energy required to accelerate the liquid as it enters and leaves the capillary. When this effect is taken into account, Equation 7.17 reads [30]... 

In conclusion, the following experiments on filtration-washing-deliquoring should be performed to produce data (viscosity of liquids, effective solid concentration, specific cake resistance, cake compressibility, etc.) that are necessary to evaluate times of individual steps of filtration at an industrial scale, i.e. to obtain the proper basis for scale-up of filtration processes measure the filtrate volume versus time make marks on your vacuum flask and take down the time when the filtrate level reaches the mark => no more experiments are needed for preliminary evaluations of filtration properties of slurries initially fines pass the filter medium => recirculate them to the slurry,... 

Tests showed that liquid lubricants do not even provide adequate lubrication in the lower Vacuums of space simulators. Solid lubricants, such as molybdenum disulfide, tungsten disulfide. and the soft metals have given better results. However, the known data about space lubricants are results of simulator measurements made in the pressure range of 10 s to 1C6 torr which does not simulate real space conditions, and therefore, these available data cannot be considered completely valid. It can be expected that definite data on lubricant performance in a vacuum will be obtained by conducting tests in a simulator that reaches the low 10"10 torr range. At this press level, the monolayer formation time is increased to at least several hours which will result in a sufficient time span for observing the metal... 

Previous studies (Velez et al." ) indicated a good correlation between receptor-based assay (RBA) results and mouse i.p. toxicity (/ =. 97 V=41). In routine work performed between 1995 and 1997, the practical detection limit was 0.04 pg STX eq./lOO g, three orders of magnitude lower than the MBA, providing quantitative data below the detection level of the MBA and thus early warning measurements. Typically, 20-40 samples plus the standard curve, three internal positive controls and 1 negative control could be run per work shift using a conventional liquid scintillation counter. 

The data from the analyses conducted on the liquid phase are summarized in Table 6. The results of the Friedman test, performed to evaluate the influence of soil contamination level on Cu + activities, are presented in Table 4. In all soil components, the Cu + activities are significantly influenced by the level of soil contamination, with the absolute Cu + activities decreasing with distance from the smelter (Table 6 and Fig. 4a). As shown in Table 6 and Fig. 4a, a significant soil component difference (p 0.10) is found only at site 3, where the bulk soil hosts relatively higher mean free Cu + activities, while the lowest amounts are measured in the outer rhizosphere. Thus, unlike the results presented for Cu in the solid phase, the inner rhizosphere is not the soil component where the highest Cu + activities are found. In fact, no general trend emerges for free Cu + activities between the three soil components (Fig. 4a). 

---