C-glass fibers

These generally defined requirements are met quite comprehensively by microfiber glass fleeces. These are blends of C-glass fibers of various diameter, which are processed in the usual way on a Foudrinier paper machine into a voluminous glass mat. The blending ratio gains special importance since cost aspects have to be balanced against technical properties. The... 

Filter the samples on Whatman GF/C glass fiber filters, wetted with Soln. E, in a holder manifold and wash twice with 2 ml of ice-cold Soln. D. Transfer the filters into scintillation vials, add scintillation cocktail, and count for radioactivity. 

Dilute 2 X 10 cells in 17 ml Soln. A and warm up to 37 °C. Prepare a solution of H-PN 200-110 (about 1 600 000dpm) in 3 ml. Mix both solutions and continue incubation at 37 °C. Take 1-ml probes in duplicate at timet = 0,l,2,4>6,8,10,12,15,and20 min after mixing (- Bt ). Precipitate the probes with 2 ml of ice-cold Soln. D immediately after sampling and filter on Whatman GF/C glass fiber filters. Prepare a blank ( Bo ) by incubation of a mixture of 850-pl cell suspension and 150 pi Soln. C at 37 °C for 20 min. Wash the filters with Soln. D. Dry the filters at air and count for radioactivity. 

Muscarinic receptor (mAChR). Membrane preparations adjusted to 500 pg protein in a final volume of 500 pL buffer were incubated with [3H]-quinuclidinyl benzilate (QNB) (52.3 Ci/mmol Dupont NEN) for 1 h at 20° in the absence and presence of alkaloids, employing 20 pM atropine as a positive control substance. The incubation was stopped with 3 mL ice-cold 0.9% NaCI-solution and filtered (by suction) through Whatman GF/C glass fiber filters. The filters were washed three times with 3 ml 0.9% NaCI, placed in vials, and dried for 30 min at 60°C. Their radioactivity was measured in a liquid scintillation counter (RackBeta, Pharmacia) using Ultima-Gold" (Packard) as the scintillation cocktail. 

Fig. 1-7 Apparent thermal conductivities of typical cryogenic insulation material (a) multilayer insulations (b) opacified powders (c) glass fibers (cf) powders (e) foams, powders, and fibers, according to Ref. 1. [1 Btu in/h ft2 ° F = 144 mW/m °C]...

A 20 pi reaction mix, containing 30 pCi (i.e., 3 pi of 10 mCi/ml) is assumed. After incorporation of precursor, the mix is diluted twice and 2 pi is diluted 100-fold with TE containing 10 pg of carrier nucleic acid. Half of the TE-diluted sample (100 pi) is directly counted in a scintillation counter whereas 2 ml of cold 5% TCA (containing 20 mM pyrophosphate) is added to the other half, then mixed and incubated on ice for 5 min and the precipitate collected on GF/C glass-fiber filters. The tube should be washed once with 5% TCA and twice with 95% ethanol and the washes also passed through the filter (alternatively, the TE-diluted sample can be applied to the filter and then rinsed with the TCA solution Table 8.11A). The radioactivity counted on the filter indicates the amount incorporated. For example, 1X 10 /2X10 or 50% is incorporated. 

There is a common requirement in water analysis to separate the dissolved or suspended component in the sample before analysis. This is usually achieved by a physical separation step. Filtration is the most commonly used sample pretreatment method. Membrane and glass fiber filters are available in a variety of pore sizes and membranes are available in different materials. Water analysts normally use GF/C glass fiber filters for suspended solids determinations and 0.45 pm cellulose-based filters to define the soluble/ insoluble fraction in samples. However, all filters and filtration apparatus must be checked to confirm... 

JINWU Glass Fibre - http //www.jwfg.com China, E- and C-glass fiber fiibrics, yams, and rovings... 

Polyether sulfone has a Tg near 225°C and is dimensionally stable over a wide range of temperatures. It can withstand long-term use up to 200° C and can carry loads for long times up to 180°C. Glass fiber-reinforced grades are available for increased properties. It is resistant to most chemicals with the exception of polar, aromatic hydrocarbons. ... 

GF/C glass fiber disks (Whatman, Clifton, NJ), Erlenmeyer filtration flask, 10 and 5% w/v trichloroacetic acid (TCA) diluted in sterile water 16 Phenol/chloroform (1 1)... 

Add DTT to 10 mM, ammonium acetate to 0.3 M, and precipitate the RNA with ethanol as in step 8. Wash the RNA precipitate in 70% ethanol and dry the pellet. In parallel, proceed to scintillation counting see Note 7) as follows- to one of the 2-pL reaction aliquots (from step 4), add 70 pL of water, 25 pL of BSA (2 mg/mL) and 100 pL of 20% trichloroacetic acid (TCA). Allow the RNA to precipitate at 0°C for 10 min then collect the RNA by filtration onto a GF/C glass fiber disk Wash the filter with 5% TCA. Spot the second 2-pL reaction aliquot (initial... 

Hickel W. 1984. Seston retention by Whatman GF/C glass-fiber filters. Mar. Ecol. Prog. Ser. 16 185-191. 

On the top of the particle-filled collection plate, place an empty 96-well hydro-phobic GF/C glass fiber filter plate (2-mL capacity) upside down. 

Non-woven layers contain a mass percentage of approx. 15% glass fibers in the form of A- or C-glass fibers. Synthetic non-wovens are also used [580]. 

Crack formation in unloaded C-glass fibers following storage in 5% HCI, > 200 h, 80 °C... 

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