Chromatography is an analytical technique employed for purification and separation of organic and inorganic substances including characterisation and quantitative measurement of compounds (table). Basically there are two types: l. Gas chromatography (GC), 2. Liquid chromatography (LC). Although discovered in 1906 by Tshett, developed in the 1950s as the GC technique where the mobile phase are g...

A He isotopic purification cryostat has been developed, capable of sustained operation in continuous flow. Starting from a feedstock of helium of the natural isotopic ratio, He/He = x3 ≈ 10−7, it yields a purified product for which x3 < 5× 10−13 at a production rate of 3.3 STP m h−1. The isotopically purified He is being used for a variety of applications, including quantum evaporation experime...

In industry, the porosity of petrochemical reservoirs is measured frequently by coring and is an important property when trying to determine if a site is appropriate for drilling. Porosity can also be used in waste water treatment in order to determine if a material is ideal for water purification in industrial or residential applications. The purpose of this experiment was to simulate a oil re...

Purpose of the study is to іnvestigate simultaneous effect cavitation and helium on viability yeast genus Saccharomyces cerevisiae in water. To change number cells during treatment water system gas atmosphere. Methods. Yeast type were used as test microorganisms. Freshly prepared distilled desaerated was for research, which introduced with a microbiological loop. The volume model medium cooled ...

As an illustration, consider the following two-step adsorption cycle to purify helium diving gas. Helium diving gas is principally a mixture of oxygen and helium, when the diving chambers are depressurised, the contaminated gas will consist mainly of carbon dioxide, oxygen and helium. Traditionally this waste gas has been thrown away. The PSA cycle described below is a method of purifying this ...

The simultaneous effect of cavitation and inert gases (argon helium) on the process microorganisms (MO) destruction has been studied. Sporogenic rod-shaped bacteria Bacillus cereus type were used for study. initial microbial load was 104 cells per 1 cm3 test water. volume water study 75 cm3. source phenomenon an ultrasonic generator with a frequency 22 kHz. gas bubbled through system at rate 0....