the film's impact strength resistance is enhanced by 25%, flexibility by 50%, acid resistance by 30%, alkali resistance by 133%, salt mist resistance by about 100% . The film can still maintain excellent adhesion and anti rubbing ,its endurance temperature increases from 80°C to 150°C.
Artificial weathering ageing resistance,staining resistance, acid resistance of coating film, coating operational test and applied operation technique for water based polyurethane acrylate compounded exterior wall coating are presented.
This article has described the preparation technology of modified hydroxyl acrylic resin and the preformance of the acrylic automotive clear finish,which is a high performance automotive OEM coatings with simple preparation technology,good acid resistance and mechanical properties.
After 96 hours of fermentation, the activity of acid-resistant a-amylase and saccharifying enzyme reached a high level of 86.37u/mL and 25229.7 u/mL respectively.
By using the furnan resin to modify the E-44, it was obtained that the optimum reaction conditions were R (furnan:epoxy resin) = 1:1, reaction 5 hours at 120℃.
Enhanced heat stability, acid resistance, alkali resistance, and anti-trypsin stability of the modified enzyme were observed compared with those of the unmodified enzyme.
This paper reports on the study of acid tolerance of lactic acid bacteria as a property of cells, determining their ability to divide efficiently and retain viability under conditions of increased nutrient medium acidity during bacterial growth.
Bacteria of the strain STE05 lacked acid tolerance (at pH below 6.5, growth was retarded, and pH 5.0 was the lowest value at which the cells remained viable).
Acid tolerance is inherited in a stable manner and retained by the segregants of TV2 strain obtained in the course of long-term storage of the bacteria.
The calditol with an ether linkage in the molecule suggested an important role regarding the properties of heat-resistance and acid-resistance observed inSulfolobales.
Recently, it was reported that another two-component system termed CrdRS (HP1365-HP1364) is required for pH-responsive regulation of the major acid-resistance systems in the H.
The experiment shows that the TiO2/CuO coating is more heat-resistant, acid-resistant, and wear resistant than CuO coating, without losing absorptivity markedly.
The influence of the hydrogen-ion concentration on the growth and metabolism of a highly acid-resistant green alga, Chlorella ellipsoidea (strain Marburg St), was studied.