Plastic jars with caps

After being washed in three changes of 5 min each in PBS, the slide is placed in a plastic jar containing 60ml of 10 mM sodium citrate buffer (pH 6.0) and 0.04% Triton X-100. The jar is loosely covered with its screw cap and heated for 5 min in a microwave oven at high power. The buffer starts to boil after 90 sec. The heating process is interrupted at intervals of 1 min so that the fluid level can be checked and replenished in the jar. The sections must not be allowed to dry. The jar is removed from the oven and allowed to cool to room temperature for 20-30 min. The sections are rinsed in three changes of 5 min each in PBS. 

Soil samples for VOC analysis are collected into airtight coring devices or into preserved VOA vials. Soil samples for SVOC, metal, and inorganic parameter analyses are collected into brass or stainless steel core barrel liners, acrylic liners, or into glass jars with PTFE-lined lids. The liners are capped with PTFE sheets and plastic caps. 

Place one teaspoon of pulverized hexamine in a sturdy pint jar for which a good, tight plastic or plastic-coated twist cap is available. Place two teaspoons of dry dtric add powder in the jar with the single teaspoon of hexamine. Citric acid is available in home-canning sections of grocery stores, drugstores, and even health food stores. Cost, at this writing is about 6.90 for 4 ounces of the dry, white powder ... 

Some amino resins are used as additives to modify the properties of other materials. For example, a small amount of amino resin added to textile fabric imparts the familiar wash-and-wear quaUties to shirts and dresses. Automobile tires are strengthened by amino resins which improve the adhesion of mbber to tire cord (qv). A racing sailboat may have a better chance to win because the sails of Dacron polyester have been treated with an amino resin (1). Amino resins can improve the strength of paper even when it is wet. Molding compounds based on amino resins are used for parts of electrical devices, botde and jar caps, molded plastic dinnerware, and buttons. 

Place the Coplin jars or containers in the center of the microwave s turntable, cover containers with loose-fitting lids or screw caps, and heat at maximum power (700-1000 W) (see Note 9). The time of irradiation depends on the power setting of the microwave, the type of container used, and the volume of buffer. The solution should boil for 3-5 min. A large capacity microwaveable plastic container containing as much as 600 mL of citrate buffer may require a 30-min heating cycle (11). 

Sampling of subsurface soil into core barrel liners has been widely used until EPA Method 5035 came into effect. In this sampling method, after a core barrel liner has been filled with soil, it is capped with PTFE sheets or aluminum foil and plastic caps. These types of closure do not prevent the VOC loss from soil, which for some compounds may exceed 97 percent after only 6 days of cold storage (Hewitt, 1999). If sampling and storage in glass jars or core barrel liners cannot be avoided, samples must be delivered to the laboratory and analyzed within the shortest time after collection. 

Chem. Descrip. Acetyl tributyl citrate CAS 77-90-7 EINECS/ELINCS 201-067-0 Uses Plasticizer for Indirect and direct food contact applies., PVC toys, cellulose nitrate films, aerosol hair sprays, dairy prod, cartons, drink bottle caps, food Jar caps, sol n. coatings for foil and paper milling lubricant for aluminum foil or sheet steel for use in cans for beverage and food prods. food pkg. adhesives, coatings, paper, cellophane Features Produces resins with exc. heat stability and low toxicity Regulatory FDA 21 CFR 172.515,175.105,175.300,175.320,175.380, 175.390,176.170,176.180,177.1200,177.1210,178.3910,181.27 Properties APHA 30 max. color, essentially odorless insol. in water m, w. 

Physical dimensions of many processed parts must be held to fairly close tolerances to ensure proper assembly of parts into a complete structure, as, for example, molded fender panels bolted to steel chassis cars, plastic screw caps for glass jars, etc. In general, the final dimensions of the processed part will differ from the dimensions of the mold cavity or the pultrusion die. Such differences are somewhat predictable, but are usually unique to the specific material and to the specific process. The dimensions of a mold cavity for a phenolic part requiring close tolerances will often be different from dimensions of a cavity for an identical polyester part. Both the part designer and the mold or die designer must have a full understanding of the factors affecting final dimensions of the finished product, and often need to make compromises in tolerances of both part and cavity dimensions (or even in plastic material selection) in order to achieve satisfactory results with the finished product. 

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