Wheaton bottles

Deep water sampling procedures are similar to those for surface water sampling, the difference is in the sample delivery method. There are several types of discrete depth liquid samplers available today to perform this task, such as glass weighted bottles, Wheaton bottles, Kemmerer samplers, or electrical pumps. 

The glass weighted bottles and Wheaton bottles have a common design feature they stay unopened until they are lowered to a desired depth on a measured line. The bottle stopper is attached to a line and may be opened by sharply pulling the line once the selected depth has been reached. The liquid fills the bottle through the upper opening, and the bottle is quickly retrieved to the surface. 

Machines to rotate the bottles are available commercially from a number of companies (e.g. Wheaton, Luckham, Hotpack, Voss Appendix 3) and many home made ones are in use (see Fig. 3.3). At Glasgow University one type of machine made in the Biochemistry Department will roll up to 120 bottles and in the Instituto Zoopro-filattico Sperimentale in Brescia they can roll up to 7000 bottles simultaneously. 

The Wheaton roller apparatus comes in modular form. The base unit holds the drive and will roll 5 bottles. Up to 8 additional decks can be added to allow rotation of up to 45 bottles. Also available is an alarm system which gives warning of rotational failure, and an auxiliary battery system which will enable the apparatus to operate for up to 48 h in the absence of an electricity supply. 

For suspension cultures, spinner flasks (Techne, Wheaton, Bellco, Cellon, etc.) and bottles are available, which provide sufficient capacity for most small-scale preparation of cells. Sizes range from 25 to 10 000 ml, and the stirring rate can be adapted for each cell type. 

Roller bottle apparatus with speed control between 5 and 60 rph (e.g. Wheaton, Bellco, New Brunswick)... 

Copolymerization Studies. All copolymerizations for determining reactivity ratios were cz ried out under nitrogen in sealed Wheaton pressure bottles fitted with a magnetic stir bar. The monomers, solvent (2-propanol, 40% of total monomer), and AIBN were combined the mixtures were then degassed by conventional freeze-thaw techniques, flushed under nitrogen, sealed, and polymerized (see Tables III and IV for conditions). All copolymerizations were terminated by pouring the reaction mixtures into a large excess of non-solvent (acetone or diethyl ether). The crude polymer was redissolved, reprecipitated... 

Wheaton HDPE colored and clear bottles 12,000 Waste Management andNARC (drop-off) 8/89 1... 

Recycled HDPE sourced from PET soda bottle basecups and postconsumer household cleaner rigid bottle was supplied by Wheaton Plastics, Polymer Resource Group, or the now defunct Plastics Recycling Alliance. The feedstock appeared consistent from supplier to supplier. The PP component is a mixture of MONTELL USA Inc. homopolymer and copolymer industrial off-grade materials. The mixture was peroxide visbroken to a consistent meet flow rate (MER) of 20 before compounding. 

Fig. 2.3 Conttiiners a Wheaton glass bottles, b split-root systems, c soil cups, and d soil columns...

Containers a Wheaton glass bottles, b split-root systems,... 

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