Tea bag container

Sullivan MJ, Stanford JT. 1990. Risk associated with potential exposure to dioxin through consumption of tea brewed using tea bags containing bleached pulp. Chemosphere 20 1755-1762. 

A tea bag contains about 3.4 g of tea and a large cup may contain about 250 cm3 of water. It is not convenient to measure and dispense boiling water, so the normal domestic procedure has been adapted for the laboratory. 

The water content of superabsorbent polymers is usually measured by a tea bag method as follows The dried copolymers are put into a tea bag made of nonwoven fabric. Then they are soaked into excess deionized water or salt solutions for 24 hr at desired temperature. After the tea bag containing polymers are soaked in aqueous solution, the water unabsorbed into gels is removed by placing the tea bag in air for a... 

In this demonstration a tea bag containing manganese(IV) oxide is first suspended and then dropped into 100-volume hydrogen peroxide in a narrow-necked vessel, such as a conical flask. The reaction is so rapid a jet of steam is produced that creates a cloud above the vessel. With imagination, this could be a genie who can be summoned by rubbing a magic lamp ... 

All those types of preparations for which no measurement of the amount needful for a cup is required, thus, for example, a tea bag, or products which contain prepared, mostly directly soluble extracts, as for example instant or tube teas. 

However, other polymer composite materials also popular in solid-phase synthesis, such as polyethylene or polypropylene tea bags , lanterns, crowns, or plugs, are generally less suitable for high-temperature reactions (>160 °C). Therefore, micro-wave irradiation is typically not a very suitable tool to speed up reactions that utilize these materials as either a solid support or as containment for the solid support. 

Subterranean parts, powder, extract, and tincture are permitted as traditional tranquilizers The Health Protection Branch of Health Canada allows products containing valerian as a single medicinal ingredient in the form of crude dried root in tablets, capsules, powders, extracts, tinctures, drops, or tea bags intended to be used as sleeping aids/sedatives... 

In 1985 Houghton introduced his tea bag method for the rapid solid phase multiple peptide synthesis. In this technique the beads are contained within a porous polypropylene bag. All the reactions, including deprotections, are... 

In a similar approach, a pretuned glass encased microchip set to emit a unique binary code is placed in a polypropylene tea bag loaded with polystyrene beads. Using a modified split synthesis approach, a 125-membered tripeptide library N-capped as the /r-carboxy-cinnamic acid amide was prepared on Rink resin. Each porous reactor contained a radio frequency transporter which successfully defined the structure of two inhibitors of protein tyrosine phosphatase [37],... 

Cocaine is an alkaloid derived from the plant Erythroxylon coca and other Erythroxylon species in South America. The leaves contain cocaine as the principal alkaloid, plus a variety of minor alkaloids. Only decocainized coca products are legal in the USA, but some commercially available tea products have been found in the past to contain cocaine in a concentration normally found in coca leaves (about 5 mg of cocaine per 1 g tea-bag). This results in only mild symptoms when package directions to drink a few cups per day are followed, but massive overdosing can result in severe agitation, tachycardia, sweating, and raised blood pressure. 

A third example was the presence of cocaine in an individual s urine due to accidental ingestion. Inca tea, a tea made from purportedly decocainized cocaine leaves purchased in a health food store, was brewed and ingested by an individual who was later found to be positive for cocaine. If the cocaine had been removed from the leaves as stated, the product would have been perfectly legal and could not have contributed to a positive urinalysis (low probability event number one). Likewise, if the individual had not been tested within a few hours of consuming the tea, the results probably would have been negative (low probability event number two). In this case, a sample of the tea bag was produced, analyzed, and found to contain cocaine in sufficient quantities to cause a positive urinalysis (low probabihty event number three). Further investigation revealed that Inca tea leaves were ground and dried cocaine leaves and not decocainized. The product was immediately removed from the market. - ... 

Centrifugation is a powerful technique allowing the parallel processing of an unlimited number of reaction compartments (101). The first centrifugal multiple peptide synthesizer, Compas 242 (76,102), utilized centrifugation for liquid removal from the functionalized cotton used as the solid support or from resin contained in polypropylene mesh bags (703). This system enabled the automation of tea-bag synthetic methodology. In principle, however, separation of solid and liquid phases was still accomplished by filtration. 

The tea bag method is very practical. It does not require any special tools, except a sealing device. A number of mesh materials of different porosity are available from Spectrum Medical Industries, Inc. Almost all commercially available resins can be used as long as the size of the beads is larger than the mesh size. The scale of the synthesis is easy to control by the size of the packet chosen to contain the desired amount of a polymer support. The multiple synthesis can be carried out manually or on a synthesizer. 

To an Erlenmeyer flask containing 25 g of tea leaves (or 10 tea bags) add 225 mL of vigorously boiling water. Allow the mixture to stand for 7 min and then decant into another Erlenmeyer flask. To the hot tea leaves add another 50 mL of hot water and then immediately decant and combine with the first extract. V ery little, if any, additional caffeine is extracted by boiling the tea leaves for 20 min. Decantation works nearly as well as vacuum filtration and is much faster. 

Seebach s group demonstrated the utility of polymer-bound, chiral titanium TADDOLates in preparing chiral secondary alcohols (Figure 3.24).The polymeric catalyst 37 was contained inside a mesh tea bag, and was reused by simply charging fresh reagents and solvent. The ruggedness of the system was shown when the product enantioselectivity dropped from 96% (S) to only 92% (S) over 20 successive runs, and the average yield was 90% [50]. 

Ten boxes of teas, each box containing 20 tea bags (2.5 g of dried tea, 1 g for Kinkeliba) were randomly selected to make two composite samples of 100 grams each, thus all the quality and chemistry procedures were run in duplicate. 

Small, paper or textile bags containing China tea, after they have been boiled and cooled in the refrigerator, make excellent, refreshing compresses that can be used to aUevi-... 

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