Mildew growth

The tropical humidity test simulates hot humid conditions—e.g., 90°F., at 90% relative humidity. The samples are wetted down and sprayed with a mixed fungal population to accelerate mildew growth. 

S Sanitary sealants. Sanitary sealants prevent the infiltration of water between wall and sanitary installations. They are also resistant to mildew growth and common detergents. 

Figure 1. Representative agar dish growth tests of A. pullulans and Alternaria on polymer films deposited on ceramic tiles. Key top, unprotected film—mildew growth over entire dish middle, film protected by fungicide-polymer film—zone of inhibition around tile and bottom, film protected by polymer-boundfungicide—film is protected without wasteful zone of inhibition.

Table 13-Relative Mildew Growth On Polymer And Paint Samples Exposed To Aureobasidium Pullulans for Two Months By The Sapwood-Substrate Enriched Vermiculite Method (Zabel Test)... 

The relative mildew growth on polymer and on paint samples exposed to Aurobasldlum pullulans was also studied using the "Zabel Test." In this procedure, veneer strips of southern yellow pine and bass wood are sterilized, cooled, and painted (2 coats with 24 hrs. drying time). After 2-3 days the strips were soaked In distilled water, sterilized at 100 C and placed vertically In 16-ounce French square bottles containing 20 gm. of vermiculite. A mlcronutrlent enriched nutrient media was then poured Into the vermiculite (100 ml per bottle). After sterilization at 121 the painted strips were positioned so that the bottom of the painted zone was 0.5 cm above the vermiculite surface. The specimens were Inoculated with a spore suspension of Aureobasldlum pullulans (16624) by pipette. Incubated two months at 28 , and then rated visually with a 20x binocular. In the weathered series, the specimens were exposed four days In an Atlas Weather 0 Meter (UV and water spray). Representative results are summarized In Table 13. 

Formulated to resist mould or mildew growth on the paint film. 

For decades, manufacturers of latex coatings had to employ separate biocides to preserve paint in the can and prevent mildew growth on dry film because none of the available products had the broad-spectrum antimicrobial efficacy required to serve in both capacities. Rohm Haas has a novel isothiazolinone biocide that provides paint manufacturers with a highly effective, two-for-one alternative to conventional biocide packages and eliminates the need for separate in-can preservatives and mildewcides. Rozone 2000 biocide has low water... 

To allow for Inevitable differences In Infection levels between experiments, transfer was expressed relative to the incorporation of HJ methionine into trichloroacetic acid insoluble material (= protein), which provided a measure of mildew growth. This technique only accounted for radioactivity In conidla and surface mycelium, not haustorla, but significant differences In the transfer of triadlmenol were apparent between strains (Table III). These differences were not, however, correlated with triadlmenol sensitivity, so that if reduced accumulation is involved in DMI resistance in barley powdery mildew, it must not operate in all resistant strains. In the same experiments we looked at the possibility that detoxification of triadlmenol might account for resistance, but were unable to find any evidence of triadlmenol metabolites in the six strains examined. 

Spray surface to be treated, making sure surface is completely wet. Let air dry. Repeat at weekly intervals or when mildew growth reappears. 

These cases suggest that the plasticizer may function as a compatibilizer of the polymer blend. In one case, a phosphate plasticizer was selected because it reduced mildew growth in conjunction with a common fungicide (Busan 11). 

Mercury compounds were at one time used as a bactericide and a fungicide in waterborne paints. A bactericide is needed to prevent bacteria growth during storage of the sealed paint can. A fungicide is needed to prevent mildew growth on the cured paint film under humid conditions. Wicks et al. [4(i)] give the modern-day replacements for the earlier mercuiy compounds. 

Hotels are using desiccant systems to supply dry makeup air so that the mold and mildews growth on the furnishings can be reduced. This is turning out to be a major saving for hotels since these furnishings now have to be changed less frequently. 

Exposure testing is performed in accordance with ASTM G7-97 at a tilt angle of 45 from the horizontal facing south with specimens mounted back. The samples are recovered and evaluated for mildew growth, cracking and delamination. 

DIN 53931 [496] Testing of textiles determination of the resistance of textiles to mildew, growth test... 

RHOPLEXTM 4400 acrylic polymer can help you develop plasticizer-free caulk and sealant formulations, which result in products with reduced dirt pickup, glossing, mildew growth and paint discoloration. This novel polymer also helps provide excellent exterior durability and good adhesion to a variety of... 

In order to determine the actual effects of normal weathering, specimens are exposed outdoors in different locations with different climates. Changes in color, cracking, crazing, chalking, mildew growth, and stress-strain properties are recorded at various time intervals. Typical check periods are 1, 2, 5, 10, and 20 years exposure. Test specimens are usually stretched at low strains and mounted on wooden supporting racks for outdoor exposure. 

Ueda, T. Yasutomi, H. Aqueous ink-jet inks with mildew growth preventioa Jpn. Kokai Tokkyo Koho JP 10007960,1998. 

Mildew susceptibility of the dry film. In geographic areas other than desert, adequate moisture is usually available to support fungal (mildew) growth. Unsightly discoloration, premature or excessive chalking, and the like can result. 

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