A polyethylene capillary burette with the single drop volume of 0.01~0.02 mL was used for the microtitration and the possible error resulting from the keeping and transportation of the water samples could be avoided.

Its capability of real time measurement makes it particularly useful for volatile liquids,in which instance the measurement of drop volume using a flowmeter or a pump is no longer reliable.

In the flowingaera existing pressure gradient, pressure gradientalso causing an extra force acting on the liquiddrops which is proportional to the pressure gradient and the volume of the liquid drop.

Capillary burette-measuring pipette micro titration,which uses home-made polyethylene capillary burette of 0.01 ～ 0.02 mL and measuring pipette of 5 ～ 10 mL to carry through the experiment is characteristic of simple apparatus,rapid determination,accurate result,and less consumption of reagent.

When a drop of 0.2uL was spotted, linear response can be observed in the range of 120-720 f mol ctDNA, and the limit of determination (3cr) is 4.4 fmol.

According to calculations in the constant drop volume approximation linear in the oscillation amplitude, the most intense acoustic emission corresponds to the dominant mode.

The optimisation of extraction parameters such as drop volume, temperature, time and solvent type, on the extraction efficiency was investigated.

The effects of different extraction solvents, solvent drop volume, sample flow rate, extraction time, and addition of salt on extraction efficiency were studied.

The effects of different factors on extraction efficiencies were also investigated and these factors included the kind of extraction solvent, solvent drop volume, sample flow rate, extraction time and addition amount of salt.

Various hydrophobic coatings having different surface nanoroughnesses were prepared and, subsequently, contact angles and sliding angles on them as a function of drop volume were measured.

The optimum conditions (droplet volume, equilibration temperature and time, extraction time, and ionic strength) were determined by the factor-rotation method.

Droplet volume, frequency, and rate of excretion were generally proportional to the susceptibility of the host variety on which the aphids were feeding.

A mean-field model which takes into account this effect was used to determine the droplet volume fraction within the flocs and thus to estimate the distance between the droplets.

The phenomenology is independent of the mixing type and of the droplet volume fraction allowing the fabrication of both direct and inverse emulsion with average droplet sizes ranging from micron to millimetre.

A gravimetric method and a photography-based method for the determination of the average single droplet volume were compared and found to be in very good agreement.

To obtain interfacial tension γ, contact angle θ and volume V from the measurements of size of the drop, a new computation method and its relevant program were worked out. The surface tension, the contact angle and the volume of Cu_2S and the interfacial tension between slag and matte are calcula- ted by this method. The program runs conveniently in the micro computer at high speed.

A math method calculating the surface tension, the volume of liquid drop and the contact angle of a liquid drop on a level substrate is worked out in this paper. The method is carried out by computer according to the projection sizes of the liquid drop which was measured by the Chatel's method. The BASIC program fitting in single board computer type ZX-48 is Compiled. The surface tensions of Hg, Cu, Cu ( 40% ) -Sb, Sb have been calculated with this program and the feasibility and the reliability of this method...

A math method calculating the surface tension, the volume of liquid drop and the contact angle of a liquid drop on a level substrate is worked out in this paper. The method is carried out by computer according to the projection sizes of the liquid drop which was measured by the Chatel's method. The BASIC program fitting in single board computer type ZX-48 is Compiled. The surface tensions of Hg, Cu, Cu ( 40% ) -Sb, Sb have been calculated with this program and the feasibility and the reliability of this method have been proved.

The present paper studies mathematically the method of calculating interfacial tension by curve fitting to the picture of sessile drop. This paper presents a com- putation method and program for calculation of interfacial tension, contact angle and volume of the liquid drop from the coordinate of meridian of sessile drop. The error of measurement of interracial tension by the sessile drop method is dis- cussed in this paper.