Pyrex plate

Chalcone la (1 g, 4.8 mmol) was placed in between two Pyrex plates and the sample was melted by being heated at 60 °C on a hot-plate, and thereafter was irradiated with a 400-W high-pressure Hg lamp for 24 h. The oily crude product was crystallized by addition of a small amount of MeOH to give, after recrystallization from MeOH, compound 2a as prisms (0.31 g, 31%), mp 123-125 °C. 

A crystalline salt of 1 and 2 (20 mg) was crushed and spread between two Pyrex plates and this was irradiated with a 400-W high-pressure mercury lamp for 20 h under an argon atmosphere. The irradiation vessel was cooled from the outside by tap water. After the irradiation, the reaction mixture was analyzed by NMR. The only peaks observable were those for the starting materials (1 and 2) and a cross photoadduct (3) (47% conversion, 39% yield). In a separate experiment, 105 mg of the salt was irradiated under similar conditions. The product 3 could be isolated simply by fractional recrystallization from ethanol (15 mL). Polymeric products (6 mg) first separated and then 18 mg (17% yield) of nearly pure 3 separated as a pale brown powder mp 215-225 °C. 

The crystals of 1 (40 mg) were spread between two Pyrex plates and irradiated with a 400-W high-pressure mercury lamp for 20 h under argon. During die irradiation, die photolysis vessel was cooled from the outside by circulation of cold water (4°C). After the irradiation, the orange photolysate was immediately evaporated in vacuo at 60 °C to remove unreacted BzCN. The residue, where 2 was present as a sole product in 65% yield on the basis of TCNB, was fractionally recrystallized with MeCN (0.6 mL) to furnish 3 mg of pure 2 as orange-yellow plates mp >300°C. 

The recrystallized a-oxoamide 1 (100-300 mg) was sandwiched between a pair of Pyrex plates (diickness 2 mm) and put into a polyethylene envelope. The envelope was sealed and placed in a cold medium (water, ice-water, or dry ice-methanol) and irradiated with a high-pressure mercury lamp (100 W) for 1-10 h. The lamp was used with a vessel for immersion type irradiation which contained dry air. The products were isolated by column chromatography on silica gel. 

Chiral two-component crystal (1 2, 800 mg) in preparative scale prepared by seeding was pulverized, placed between two Pyrex plates, and irradiated with a... 

Meanwhile, a Pyrex glass plate was patterned with metal electrodes. Then the Pyrex plate was bonded to the Si wafer using the anodic bonding process. The etching, access-hole drilling, and bonding processes are described in more detail in subsequent sections. 

Various Conditions of Anodic Bonding of Si and Pyrex Plates... 

The UV-irradiation experiments were performed by placing either single crystals or finely ground samples of 1 toluene between pyrex plates and turning the sample to ensure uniform irradiation. 

Santonin crystals (250 mg) were crushed between two Pyrex plates and photo-lyzed with a Hanovia 400 W lamp for 3 days. The bright yellow powder was dissolved in 50 mL of ethyl acetate. The reaction mixture was analyzed using GC, IR and NMR. The solvent was removed and the residue was chromatographed over silica (ether hexane = 30 70). 

When the floc-size determination is required, the cell suspension is bypassed into a glass sampler of flat Pyrex plates (Fig. 1 d) to take photomicrographs of the suspension at standstill. 

Qu et al. [2] found evidence of two kinds of unsteady flow boiling for 21 parallel microchannels measuring 231 x 713 xm. They observed in their parallel microchannel array either a global fluctuation of the whole two-phase zone for all the microchannels (Fig. 1) or chaotic fluctuations of the two-phase zone (Fig. 2) over-pressure in one microchannel and under-pressure in another. The individual microchannel mass flow rate was not controlled. Hetsroni et al. [3] created an experimental setup to study liquid-gas and liquid-vapor flow in parallel triangular microchannels with diameters of 103 to 161 p.m. They used a fast video camera coupled with a microscope through a Pyrex plate to record the flow patterns. They showed the influence of the injection method (plenum shape) and found evidence for the same inlet conditions. 

Ti02 powder is sieved on a circular Pyrex plate... 

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