Through acidulation and refluxing stability tests, the results showed that under the conditions of controlling DO=0.5-1.0mg/L, interim aeration for 30min, ceasing aeration for 180min, reaction for 35-40h, at 20℃ temperation, the total amount of sludge would be reduced from 80% to 15%-20%,CODcr in effluent was 91.7mg/L in average after 30 days operation.

The stability tests for the potency of the Hepatitis B Vaccine prepared from plasma were performed. The samples were stored at 37℃,2-8℃ and 18-22℃ for 1,1.5,and 2.5 years respectively before testing.

2. The Vitamin E equal content in samples is: 1389.0 m g/1 00g, after three month-long stability tests, the content difference does not have the significance (P>0.05) 3. By comparsion the difference of animal red blood cell SOD activeness in various monitoring teams and negative team does not have the significance (P>0.05);

2.样品中的维生素E含量平均为:1389.0 m g/1 00g,且经过三个月的稳定性试验,含量的差异无显著性(P>0.05)3.各剂量组动物红细胞SOD活性与阴性对照组相比,差异无显著性(P>0.05);

In this paper,the results of 1000 and 500h stability tests respectively made on fixed- bed reactors holding 0.2 and 30ml catalysts were given,The catalysts were characterized byXRD,FT-IR and BET.

The hydrothermal stability tests exhibit that MSAMS-4 retained a well-ordered hexagonal symmetry mesostructure both after being treated with 100 ℃ water for 120 h and streamed at 800 ℃ for 6 h.

METHOD The content of vitamin E and aloin were determined by UV spectrophotometry, the stability tests were carried out and clinical effects were observed.

According to the condition, we develop a finite frequency test algorithm for Hurwitz stability of 2 D polynomials, which can avoid the above problems existing in present 2 D frequency domain stability tests and algebraic stability tests.

Through sizing experiments,homogeneity and stability tests of the samples,the results show that the elements to be determined are homogeneously distributed in samples.

RESULTS The method was validated and the stability tests under various conditions were performed. The standard curve was linear in the range of 0.2-1.0 mg·ml~-1 with the correlation coefficient of 0.9999.The average recovery was 99.93% with RSD of 0.36%.

COD of effluent is less than 200mg-L-1 and the wastewater can reach the national discharge standard GB8978-1996. The stability tests demonstrate that both adsorption and desorption in the process are stable with JX101 resin as adsorbent.

The optimum temperature and pH of this enzyme was 50 ℃ and pH 6.2.Stability tests showed that this α-amylase was unstable at higher temperature,yet it was quite stable in wide pH range of 4.86-10.47.

Based on an analysis of the mechanism of wave action on the revetment, formulae for block thickness under the actions of regular and irregular waves were obtained through a series of stability tests.

Successful stability tests have been made considering a recently compiled catalog (CCI97) (Peresan et al., 1997).

Consistent directions of magnetization were obtained from two different sites after stability tests.

Thermal and alternating magnetic field stability tests indicate that the resultant direction is that of the earth's magnetic field at the time of cooling.

The acid and radiation stability tests showed that PAN-4A was stable against acid solution higher than pH 2 and radiation dose less than 1.89×108 rad, respectively.

Stability tests show that the adsorbents are stable under acidic conditions.

n-Butyl benzoate is proposed as a new medium for the falling drop method of determination of deuterium oxide in a sample of dilute heavy water. It is suitable for analysis in the concentration range of 0—10.5 mol% D_2O at working temperatures 22—33.5℃. A mixed medium composed of n-butyl and iso-butyl benzoate in about 1:1 ratio can be applied to analysis for 0—7 mol% D_2O at working temperatures 21.5—26.5℃. iso-Butyl benzoate can be used at 20.5℃ for analysing 0—4 mol% D_2O. Calibration curves for these media...

n-Butyl benzoate is proposed as a new medium for the falling drop method of determination of deuterium oxide in a sample of dilute heavy water. It is suitable for analysis in the concentration range of 0—10.5 mol% D_2O at working temperatures 22—33.5℃. A mixed medium composed of n-butyl and iso-butyl benzoate in about 1:1 ratio can be applied to analysis for 0—7 mol% D_2O at working temperatures 21.5—26.5℃. iso-Butyl benzoate can be used at 20.5℃ for analysing 0—4 mol% D_2O. Calibration curves for these media are shown in Fig. 9 and 10~* (in Chinese text). The relative error of determination is about 0.1%.These media are each subjected to a 500-drop stability test. They possess different periods of adaptation prior to reaching a stable state (Fig. 3). Such a "prior-period" effect can be eliminated through previously saturating the medium with water (compare the third and fourth curves in Fig. 3).ο-Fluorotoluene is a stable medium, a result differing from the observations of Krell et al., wh onsider it to be "very unstable".The varying amounts of the residual water on the tip of a micropipet in the form of a spherical segment as a result of releasing previous drops with different sizes are studied. Such variations cause errors in timing the fall of the next drop, which is intended to possess an exactly measured volume. Such a "residual-liquid" effect can be minimized by the design of a fine tip, say 1.4 mm in outer diameter. In this way, the next drops, say 8.00 μl in size, fall with speeds constant within±0.1%.

This paper presents the results of the remanent magnetic stability test of some orientated Lower Sinian sandstone samples collected in Hsiuning district, Anhwei province. Demagnetization procedure has been carried out on all specimens by alternating magnetic field, and the results show that the natural remanent magnetism of the formation is stable. The direction of the intensity of the mean remanent magnetism is determined as D_r=311° and I_r=76°. Thus, the position of the palaeomagnetic north pole at...

This paper presents the results of the remanent magnetic stability test of some orientated Lower Sinian sandstone samples collected in Hsiuning district, Anhwei province. Demagnetization procedure has been carried out on all specimens by alternating magnetic field, and the results show that the natural remanent magnetism of the formation is stable. The direction of the intensity of the mean remanent magnetism is determined as D_r=311° and I_r=76°. Thus, the position of the palaeomagnetic north pole at this age is inferred to be 90°E and 45°N, and the former latitude of the sampling site is 90°-p=63°. On the basis of the results some suggestion on the climatic condition in Hsiuning district during early Sinian period is made.

This paper gives the result of a special study of the stability sliding in rock mass on the right abutment of certain reservoir. The breaking face in landslide mass is assumed to be inclined. The ultimate equilibrium of wedge shaped mass is used to calculate the position of breaking face and the sliding force. Through the present calculation of rock mass stability, it is considered that the angle 6 between the force acting on the breaking face and the normal direction of the face would be more appropriate...

This paper gives the result of a special study of the stability sliding in rock mass on the right abutment of certain reservoir. The breaking face in landslide mass is assumed to be inclined. The ultimate equilibrium of wedge shaped mass is used to calculate the position of breaking face and the sliding force. Through the present calculation of rock mass stability, it is considered that the angle 6 between the force acting on the breaking face and the normal direction of the face would be more appropriate to take the angle of internal friction of rock. Finally, the method of equatorial horizon projection is used to analyze and calculate the sliding force and the resisting force in space. Based upon the, results of present calculation, appropriate measures have been proposed, and accordingly are adopted by the engineering projects. To the further verification of these assumptions and results of calculation, plane model stability tests of rock mass consisting of blocks, which stipulated the engineering geological condition of this project have been made. It is fully proved from the test results that the proposed assumptions and method of calculation are close to reality.