High-vacuum grease

Fig. A.5. An apparatus for the lsO-labclling of the CO2 produced in biolumines-cence reactions. The stopcocks A-E and the ground joint of reaction vessel are lubricated with high-vacuum grease, and the connections between the glass tubes are made with short pieces of thick-walled silicon rubber tubing. The stopcocks C and D are high-vacuum type, such as Ace Glass, Cat. No. 8197-04 and 8195-236, or Corning, Cat. No. 7473-3.

Not many gas chromatography investigations have been reported to date. Adlard and Withham (1) examined sebacic acid and phthalic acid esters at 255°C. in a helium flow (30 ml./min.) on columns of silicone high vacuum grease and fireclay grog they were particularly interested in testing the purity of these substances. 

Dow-Coming High-Vacuum grease Nonmelting so it can be placed on hot (140° to 150°C). Maintains consistency from -40° to 260°C. Very cheap, 13 for 5 oz. Needs to be cleaned and reapplied every several weeks whether useed or not. Shelflife as above. 

Another way of considering the effect of particle bounce is shown in Fig. 7.6. A plot of collection efficiency versus substrate loading indicates efficiencies which never reach 100 percent Particle bounce can be minimized by using collection media coated with such materials as Vaseline, L and H high-vacuum greases, stopcock grease, oil, or Apiezon (Moss and Kencyer, 1986). 

Assemble the (oven-diied) apparatus, putting a little high vacuum grease on the outer edge of each joint. Ensure that the receiver adapter and the collection flasks are secured using clips, and connect the assembly to a vacuum pump. One convenient method of doing this is to connect it to... 

In practice, vapor diffusion crystallization trials are generally carried out using 24-well Linbro plates with each well sealed by a microscope cover slip of appropriate size (See Figure 2.2b). Each well of the plate contains 500 (rl of a precipitant solution. A 2- to 4- tl drop, containing equal parts protein solution (-10 mg/ml) and precipitant solution (taken from the well), is then placed on a siliconized microscope cover slip that is carefully inverted and placed over the well. A bead of high vacuum grease previously applied to the lip of each well provides the seal between the well and the cover slip. 

FS-1265 showed a linear response in the concentration range 10 ppb -10 ppm, while both DC-high vacuum grease and silastic LS-420 showed linear response in the 10 ppb - 1 ppm range. Only minor Interferences were noted from ketones and alkylbenzene, however, the... 

Dow Coming high vacuum grease (methyl) Essential oils Pesticides Phosphorus compounds Sulfur compounds 350 E... 

Open-faced explants are ones having the inner, deep cells exposed to the medium, often for the purpose of studying deep cell motility (39,46,66,67,70), and thus Danilchik s (DFA) medium is used. A culture chamber for these explants is made by drilling a 20-mm hole in a 60-mm plastic Petri dish and gluing a 1.5, 24-mm coverslip over the hole with silicone high vacuum grease... 

Schnelle, W, Engelhard , J., and Gemlin, E., Specific Heat Capacity of Apiezon N High Vacuum Grease and of Duran Borosilicate Glass,... 

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