Glass bead coating

Figure 12.1 Harvester ant foragers are stimulated to leave the nest in search of seeds in response to cues present in the task-specific cuticular hydrocarbon profile of patrollers. After inhibition of foragers at harvester ant colonies by removal of patrollers, colony foraging behavior was rescued by the addition of ant mimics, glass beads coated with task-specific cuticular hydrocarbons from patrollers, to the nest entrance at a rate of 1 bead every 10 seconds. Data were normalized to account for differences in the absolute number of foragers active each day. The same letters above bars denote statistical significance using a Tukey s post-hoc test. From Greene and Gordon, 2003.

JB Company manufactures glass beads coated with metal for decorative purposes. 

Preparation of Saturated Solutions Using Generator Columns. Columns for the generation of saturated solutions of PAHs were prepared by packing 60-cm X 0.6-cm stainless steel columns with 60-80 mesh glass beads coated with 1% (w/w) of the compound of interest. The beads were coated by adding 20 g of the beads to 200 mL of a 0.1% methylene chloride solution of the PAH of interest and stripping the solvent with a rotary evaporator. 

Aryl coupling reactions. A new catalyst for Heck and Sonogashira couplings and allylic displacements is made from glass beads coated with triarylphosphine (1) that carry a dimethylguanidinyl group in each benzene ring. ... 

Author s data with method from Ref. 17 obtained by pulling air at 2 liters/min through 100 ml of 4-mm glass beads coated with the substance indicated. 

FIG. 2a—Asphalt AAG coated onto 3 mm glass beads a) glass beads, b) glass beads coated with asphalt, c) glass beads after spinning at 3 kHz for 30 min, then at 4 KHz for 60 min. 

Pluphenazine enanthate can be chromatographed isothermally at 250°C on 8/100 mesh glass beads coated with 0.5% of SE-30. With a retention time of 6-7 minutes the minimum detectable quantity is 0. 5i l gm. 

Finally, the styrene-divinylbenzene copolymer is certainly not the only starting material suitable for functionalization. Impermeable polymers were grafted and porous glass beads coated with organic polymers for derivatization, but these pioneering efforts had few followers so far. More auspicious seems to be, at this time, the application of polyamides, such as polyacrylamide, poly-dimethylacrylamide or polydimethylacrylamide-co-Boc-j -alanylacroyl-hexa-methylenediamine. Their promise stems from the compatibiUty of the support with the peptide chain. 

The design and application of new polymer supports for peptide synthesis remains a rapidly developing field. The use of glass beads coated with the polystyrene chloromethylated resin in a packed bed has been studied in detail. With a model tetrap>eptide the procedure was developed to a point where it became ten times faster than the usual Merrifield method but the average yield of each amino acid attachment was about 98.8% and the tetrapeptide... 

In reverse-phase column chromatography, the packing material for the stationary phase consists of glass beads coated with a nonpolar hydrocarbon film. 

Glutaraldehyde-coupling to Dowex MWA-1 Adsorption on to sulphopropyl-derivatives of crosslinked dextran Reaction with porous ceramic or lead glass beads coated with titanium(iv) oxide... 

Fig. 1 a The image of borosilicate glass beads coated with... 

Pellicularized resins, i.e., glass beads coated with co(polystyrene-DVB), and functionalized (benzyl halides) glass or silica beads. The swelling of the support is independent of the solvent, and eliminates failure sequences, but the resin capacity is low... 

Glass beads coated with Merrifield resin... 

Methyl-2 pentanol passed at ca. 400° over small glass beads coated with thoria 4-methyl-l-pentene. Gonversion 87% purity 97.5%. F. e. s. A. J. Lundeen and R. Van Hoozer, J. Org. Ghem. 32, 3386 (1967). 

---