Glass jars

Containers. Aerosol containers, made to withstand a certain amount of pressure, vary in both size and materials of constmction. They are manufactured from tin-plated steel, aluminum, and glass. The most popular aerosol container is the three-piece tin-plated steel container. Glass containers, which are usually plastic coated, generally have thicker walls than conventional glass jars. They are limited to a maximum size of 120 mL and are used for pharmaceutical and cosmetic aerosols. 

In a 4-I. wide-mouthed glass jar, fitted with a mechanical stirrer, is placed a solution of 150 g. (3 moles) of sodium cyanide (Note i) in 500 cc. of water and 318 g. (3 moles) of u.s.P. benz-aldehyde. The stirrer is started and 850 cc. of a saturated solution of sodium bisulfite (Note 2) is added to the mixture, slowly at first and then in a thm stream. The time of addition is ten to fifteen minutes. During the addition of the first half of this solution, 900 g. of cracked ice is added to the reaction mixture, a handful at a time. The layer of mandelonitrile which appears during the addition of the sulfite solution is separated from the water in a separatory funnel. The water is extracted once with about 150 cc. of benzene, the benzene is evaporated, and the residual mandelonitrile is added to the main portion. 

The first experiment with the electrostatic gas cleaning was made in 1824, when Hohlfeld show that a fog was cleared from a glass jar which contained an electrically charged point electrode. Similar demonstrations were published in the 19th century, an example being the precipitation of tobacco smoke in a glass cylinder by Guitard (1850). 

A Beckmann Freezing-point Apparatus.—The form of apparatus is shown in the accompanying Fig. 30. It consists of a glass jar standing on a metal tray and furnished with a stirrer. The cover of the jar has a wide slit to admit the stirrer, and a circular aperture with clips to hold a wide test-tube. 

Collect a 350-ml mud sample from the flowline and place the sample in the glass Jar. Allow the sample to cool to room temperature before the test is conducted. Mix at 70 V with the mixer for 1 hr. Pour the mud out, add 100 ml diesel oil, and shake well. (Do not stir with mixer.) Pour the oil out, add 50 ml xylene-isopropyl alcohol (1 1) mixture, and shake well. Empty jar, turn upside down, and allow to dry. Observe the film on the wall of the jar and report the evaluation as... 

For comparing the relative loss of a flavor component from a container, we have found the sniff test (6) very useful, especially when gas concentration measuring techniques were not available. Typical results of this type of test are shown in Table II. Each filled container was held in a glass jar for approximately 48 hours. The results are stated in qualitative, subjective terms such as slight, strong, or undetectable. The... 

Steam condensate samples should be cooled in a stainless steel sample cooler. Samples should be run for 5 to 10 minutes before being collected in a 100-ml amber glass jar with a Teflon lid. The jar should be filled completely with no air space, but without over flowing. The cap should be tight, taped if necessary, and the sample kept cool prior to laboratory analysis. 

Suggest using plastic storage containers with snap-on lids or dean, dry glass jars with screw tops for needle disposal. 

The first zinc-carbon cell made in 1876 by the French engineer G.-L. Leclanchd was a glass jar containing an aqueous solution of ammonium chloride into which were immersed an amalgamated zinc rod (the negative electrode) and a porous... 

Frozen reference materials have been produced by NIST (Wise et al. 1993). These materials do not have the disadvantages of the oils or freeze-dried materials, but are more difficult to transport. Obviously they have to be kept deep-frozen during transport, which makes their use rather expensive. Since the early 1990 s a new approach in this field has been introduced. This concerned the use of wet, sterilized fish and shellfish samples. These samples, packed in glass jars or in tins, were firstly used in the QUASIMEME program as reference materials for inter-laboratory studies (de Boer 1997). Later, when it appeared that the stability was maintained for longer periods, tests for organic contaminants based on this principle were also prepared. 

High-speed blender fitted with a leak-proof glass jar and explosion-proof motor... 

If a smaller leaf punch is used, an increased number of leaf disks must be generated for each sample. Only sample when leaf surfaces are dry from application or dew. Leaf disks are placed in glass jars for further analysis. 

Glass jar, 500- or 750-mL, with a screw-cap lined with aluminum foil... 

Weigh 25-100 g (ota) of the sample having a water content of xg/lOOg into a glass jar. Add sufflcient water to adjust the total water present to 100 g. The amount of water (mw) to be added is calculated as follows mw = (100 — wja) x x/100. Next, add 200mL of acetone and homogenize the mixture for 2 min with the homogenizer. 

Samples may be weighed into the glass jars 1 day before the extraction, if the glass jars are tightly closed with a screw-cap and are stored at -20 °C. 

Accurately weigh the appropriate portion (100-g for cucumber and grape, 50-g for potato and wine, 25-g for raisins and grain) into a 500-mL screw-top glass jar (or... 

---