摘要:
A process for renewing a cylinder head, preferably a cast aluminum water cooled cylinder head from a used condition to a rebuilt condition suitable for reuse. In a qualifying stage the used cylinder head is stripped of removable parts, inspected, heat treated for cleaning and stress relieving purposes, and then pressure tested to detect leaks through cracks or excessive porosity. If cracks are located, the cylinder head passes through a reconstruction stage wherein cracked areas are removed and replaced by welded material, recontoured and preferably again pressure tested. A cylinder head which did not need reconstruction (or after reconstruction) then passes to the rebuilding stage where it is essentially machined and component parts replaced. Included in the rebuilding stage is a line-boring and surface gasket facing procedure for eliminating the adverse effects of warpage and a vacuum impregnation step to seal the pores of the cylinder head.
摘要:
Oil is removed from sea water, for example, in the cleaning of tanks of oil transport ships, by utilizing bacteria or cell-free solutions from such bacteria in a confined space with the addition of a source of nitrogen and a source of phosphorus, under aerated conditions. The resultant microbial fermentation converts the oil to protein-containing by-products making it possible to discharge the contents of the tanks without oil contamination and, if desired, to recover useful by-products.
摘要:
A system and method for treating wastewater by continuously flowing wastewater into a chemostat and continuously discharging clean water out of the chemostat. The system can include sensors and an electronic controller for on-line measuring ambient parameters in the chemostat and adjusting the chemostat's operating conditions accordingly.
摘要:
A method of producing an antibiotic TA comprising (i) expressing in a host cell an exogenous polynucleotide sequence encoding at least one polypeptide selected from the group consisting of SEQ ID NOs: 1 and 3-19; and (ii) culturing the host cell under conditions suitable for synthesis of the antibiotic TA, thereby producing the antibiotic TA.
摘要翻译:一种生产抗生素TA的方法,包括(i)在宿主细胞中表达编码选自SEQ ID NO:1和3-19的至少一种多肽的外源多核苷酸序列; 和(ii)在适于合成抗生素TA的条件下培养宿主细胞,从而产生抗生素TA。
摘要:
The invention relates to a preparation exhibiting enzymatic activity, which preparation has the capability of delignifying wood pulp at a temperature of at least 65.degree. C. and a pH of at least 9. Further, the invention relates to a method of producing said preparation by aerobically fermentating a selected Bacillus stearothermophilus strain. Furthermore, the invention relates to two isolated Bacillus stearothermophilus strains and mutants and variants thereof. The invention also relates to applications of the preparation of the invention, namely to a process comprising treatment of wood pulp with a preparation according to the invention, and a wood pulp and a fluff pulp treated with a preparation according to the invention, and also a paper, a board and a fluff made from a wood pulp treated with a preparation according to the invention.
摘要:
The present invention relates to polymeric dispersing agents for finely divided materials, particularly minerals, which are fermentation products of bacteria. The invention relates to bacterial strains producing such dispersants and to a process for the production of the dispersants by fermentation of such bacteria.The invention further relates to compositions containing effective quantities of such polymeric fermentation products in order to be effective dispersants for minerals.
摘要:
A system and method for treating wastewater by continuously flowing wastewater into a chemostat and continuously discharging clean water out of the chemostat. The system can include sensors and an electronic controller for on-line measuring ambient parameters in the chemostat and adjusting the chemostat's operating conditions accordingly.
摘要:
A novel antibiotic, designated as Antibiotic TA, having maximum absorbance at about 242 nm in methanol, an IR spectrum as shown in FIG. 3 and R.sub.f values as given in Table III. A process for obtaining Antibiotic TA by cultivating under aerobic conditions a strain of the species Myxococcus xanthus until substantial antibiotic activity is attained, and purifying the antibiotic. Advantageously Myxococcus xanthus TA is used. The invention relates also to pharmaceutical and veterinary compositions of matter comprising Antibiotic TA as active ingredient.