The so - called vacuum drying is heating & drying of the materials under vacuum conditions to which , vacuum pump is adopted for air - bleed and humidity suction thus speedy drying is reached
22.
Abstract : the thesis introduces drying principle �� the characteristics �� construction and control prmciple of a new developed vacuum drying furnace with the heat air by harbin song jiang electric furnace work
23.
After the vacuum dry and the sphere mill , the level of agglomeration is low , the particle size is very small , spherical and the nanometer stannic dioxide powder with the aspects of good scattered nature is achieved
24.
This model vacuum pump is widely applied in industries of metallurgical , mechanical , electronic , chemical , petroleum , medicine for vacuum metallurgy , vacuum coating , vacuum heat - treatment , vacuum drying processes etc
25.
The influence of pipeline flow resistance on net speed of vacuum pump is analyzed in long - distance pipeline vacuum drying , the calculation method of net speed of vacuum pump is given and checked up with site experiment
26.
Conventionally the power capacitors were manufactured the way their wound cores should be heated and dried in a vacuum drying vessel first , and the cores should be pressed into capacitor shells , then all the unfinished capacitors were put into a vacuum pressure tank for inpregnation
27.
The hwtx - i gene was chemically synthesized according to its known cdna sequence , the gene was inserted into vector ppic9k which contained aoxj promotor and the sequence of a secreting signal peptide - a - factor , the cloning ppic9k / hwtx - i was constructed and confirmed by two - step pcr and dna sequence analysis , then it was transformed into host strain gs115 , a his + muts cell line was screened and multicopy transformants were screened by various g418 concentrations , the multicopy transformant was named gh1 . gh1 was cultivated in flasks . after 6 days of induction by 0 . 5 % methanol , the supernatant was checked by 16 . 5 % tricine - sds page , which showed there was a band in the position of 3 . 5 - 6 . 1kd , then it was isolated and desalted by ultrofiltration followed by ion exchange of cm column , after reverse phase hplc of ci8 and vacuum drying , the purified rhwtx - 1 was obtained which was proved to be correct recombinant hwtx - i by tricine sds - page , maldi - tof mass spectrometry , amino acid composition analysis , the n - terminal amino acid sequence and its biological activity , the final field of the purified rhwtx - i was about 80mg / l , accounting for 23 . 6 % of it total secretory proteins
