Adsorbent cotton

Streptomyces bluensis NRRL 2876 Polyacrylic acid cation exchange resin Sea sand, adsorbent cotton and fossil flour Carbon... 

Water acetone effluent from the 1-st column (187 L) was dried and gave 1034 g of bluensomycin, the second gave 777 g. The portions of antibiotic were combined and purified by chromatography. The column (high 1.2 m, volume 155 L, with sea sand, adsorbent cotton and fossil flour as the carrier) was used. It was washed with 150 L of deionized water and 300 L 10% water acetone (rate 410 ml per minute). A fraction 101-127 L water acetone gave 640 g bluensomycin after drying. The IR and UV spectra, element analysis confirmed the structure of prepared product and its purity. 

Adsorbent cotton is used as a wipe material. Dichloromethane or methanol can be used as wetting solvent. 

Procedure to perform several adiabatic oxidatively-heating tests, which are started from each r, with mutual intervals of 1 2 K, in order to calculate the heat generation data of an oil-soaked adsorbent cotton, for 2 cm each of several samples of the oil-soaked adsorbent cotton charged each in the draft cell, into which air is supplied, for the time. At, required for the temperature of each sample of the oil-soaked adsorbent cotton to increase by the definite value of AT of 1.25 K from the corresponding standard temperature, respectively... 

As stated in Preface, whenever the adiabatie oxidatively-heating test is performed for an oxidatively-heating liquid, such as unsaturated fatty acid, the liquid is tested, in principle, in the form of oil-soaked adsorbent cotton at relatively low temperatures, or in the form of oil-soaked glass wool at relatively high temperatures. And, the Tc for a heap of the oil-soaked adsorbent cotton, or that of the oil-soaked glass wool, having some one of the several specific shapes and an arbitrary size, placed in the atmosphere under isothermal conditions, is also calculated in the same manner as applied to the calculation of the 71 for a heap of a gas-permeable oxidatively-heating substance. 

The liquid tested and adsorbent cotton or glass wool are kept in vacuum desiccators in the dark, respectively. 

L of an oxidatively-heating liquid is added, by means of a microsyringe, onto about 500 mg of ethyl ether placed in a small beaker. 50 mg of adsorbent cotton is next immersed in the ethyl ether solution to soak up the solution. The solution-soaked adsorbent cotton is allowed to stand at room temperature until ethyl ether has evaporated almost completely. 

After a thin gas-permeable silica fiber sheet has been placed on the bottom of a draft cell, i.e., the cell with which the sample cell is prepared, the sample of the oil-soaked adsorbent cotton prepared above, the volume of which is about 2 cm is charged in the cell. The glass jig mentioned in a footnote in Section 7.3 is used at this time to provide a thin vertical hole at the center of the oil-soaked adsorbent cotton charged in the cell in order to facilitate the insertion of the thermocouple into the cotton. 

The temperature of the air bath is set at a proper value, i.e., the nominal F, of the run, by means of the temperature dial on the air bath on the basis of the oxidatively-heating property of the oil-soaked adsorbent cotton tested to give estimated rates of increase in temperature of 1.25 K/h in the adiabatic oxidatively-heating test. 

The power supplies connected to the cold junction, the air bath, the digital D.C. microvoltmeter, the digital D.C. millivolt recorder and the two-pen strip chart recorder are then switched on, respectively. The A T / pen of the two-pen strip chart recorder is, however, left on the short position until the thermal equilibrium state is nearly attained around the oil-soaked adsorbent cotton charged in the draft cell, into which nitrogen gas is supplied, and inserted into the adiabatic jacket maintained at the nominal Fs of the run, 2 3 h after the start of the air bath heating. For the term, the A Tjijf pen, refer to Subsection 4.5.4. 

The digital output of the thermoelectromotive foree of the CA thermocouple to measure the temperature of the oil-soaked adsorbent cotton is then noted... 

Immediately after that, the supply of nitrogen gas into the draft cell is ceased, and the supply of air into the draft cell at a flow rate of 2 cmVmin, the adiabatic control by means of the adiabatic self-heating process recorder and the record of the oxidatively-heating process, in the early stages, of 2 cm of the oil-soaked adsorbent cotton charged in the draft cell by means of the digital D.C. millivolt recorder are started, respectively. This point of time corresponds to the point s in Fig. 15 presented in Section 3.4. 

For the procedure to calculate the value of (Te of an oil-soaked adsorbent cotton, refer to Section 6.4. 

For the procedure to calculate the Tc for a heap of an oil-soaked adsorbent cotton, having some one of the several specific shapes including the class A geometries and an arbitrary value of r, placed in the atmosphere under isothermal conditions, refer to the concrete procedure, which is exhibited in Subsection 8.4.3, to calculate the Tc for a sawdust heap of Port Orford cedar formed into an infinite slab, 60.96 cm (2 feet) in thickness, and placed in the atmosphere under isothermal conditions. 

HEPA filters and prefilters Adsorbents, cottons, rags, bulk Paper, wood, fiberglass, rubber... 

At hourly intervals, or more frequently if necessary, the water that condenses near the top of the tube is removed with adsorbent cotton. During... 

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