Rates oven, warming

OSM OTIC DIURETICS. Mannitol is administered only via the IV route The nurse inspects the solution carefully before administration because when exposed to low temperatures, mannitol solution may crystallize If crystals are observed, the bottle is warmed in a hot water bath, a dry heat oven, or autoclave to dissolve the crystals. The solution must be cooled to body temperature or lower before administering. The rate of administration and concentration of the drug is individualized. The nurse must monitor the urine output hourly. The rate of administration is adjusted to maintain a urine flow of at least 30 to 50 mL/h. 

C06-0126. The power ratings of microwave ovens are listed in watts (1 watt = 1 J/s). How many seconds will it take a microwave oven rated at 750 watts to warm 575 mL of soup from 25 °C to 85 °C Assume that the heat capacity and the density of the soup are the same as that of pure water. 

C. Brornotris[2-(perfluorohexyl)ethyl]tin. The fluorous phenyltin product (17.2 g, 13.9 mmol) and dry ether (80 mL) are transferred to a 250-mL, three-necked flask that had been dried in an oven and cooled to 0°C under argon. Bromine (0.71 mL, 14 mmol) is added dropwise over 30 min to the mixture. The addition rate is adjusted to keep the temperature between 0° and 1°C. The mixture is warmed to 25°C and stirred for 7 hr. The reaction mixture is transferred to a 250-mL, round-bottomed flask. The ether and excess bromine are removed under reduced pressure to leave a yellow oil. The oil is dissolved in FC-72 (75 mL) and transferred to a 250-mL separatory funnel. The bromine and bromobenzene by-products are removed by washing three times with methylene chloride (3 x 75 mL) leaving the fluorous layer colorless. The FC-72 is removed under reduced pressure to provide 15.8 g (12.7 mmol, 92%) of a colorless oil (Note 6). 

A. IV, N7,N"-Tris p-tolylsulfonyl)diethylenetriamine (1). A 5-L, three-necked, round-bottomed flask is equipped with a mechanical stirrer, reflux condenser, thermometer, and addition funnel. In the flask are placed 1150 g. (6.03 mole) of p-toluenesulfonyl chloride (Note 1) and 3 1. of pyridine. The mixture is stirred and warmed to 50° to dissolve the solid, the flask is immersed in a 30° water bath, and a solution of 206 g. (2.0 mole) of diethylenetriamine (Note 1) in 300 ml. of pyridine is added through the addition funnel at a rate that maintains a reaction temperature of 50-60° (1 hour). The reaction mixture is kept at 50-60° for 30 minutes longer, cooled, and divided into two equal portions in 4-1. Erlenmeyer flasks. The pyridine solutions are mechanically stirred as 1000 ml. of water is slowly poured into each. After stirring overnight and finally cooling in an ice bath for 2 hours, the white solid is collected by filtration, thoroughly washed with ice-cold 95% ethanol, and dried in a vacuum oven at 100°. The yield of triamine 1 is 950-1015 g. (84-90%), m.p. 173-175°. 

The thermograms were obtained by warming from —125 to 100°C at a scanning rate of 10°C/min during both cooling and warming. Water content was determined after the DSC scans. The pans were punctured and dried in an oven at 100°C for 10 days. 

Sodium vapour, or other alkaline vapours, can be expanded supersonically from a hot stainless steel oven with a fine exit nozzle, resulting in well focussed cluster beams. Clusters form as a result of collisions between Na atoms in the tiny expansion zone, terminating some tenths of a millimeter beyond the nozzle. The clusters warm up because the condensation is an exothermic reaction, so there also is a tendency for evaporation from the clusters. As the expansion proceeds, collisions between Na atoms end and the tendency of atoms to evaporate from the hot clusters dominates. Each cluster loses mass and cools down. In the evaporation chains, clusters with low evaporation rates, i.e., with strong binding energies, tend to become abundant. 

An oven-dried 1 L three-neck roimd-bottom flask equipped with a magnetic stir bar and a -100 °C thermometer is charged with 350 mL of anhydrous THF and KOt-Bu (48.0 g, 425 mmol). This mixture is flushed with Ar and cooled to -78 °C, and then trans-2-butene (12) (42.0 mL, 450 mmol), condensed fi-om a gas lecture bottle into a rubber-stoppered 25 mL graduated cylinder immersed in a -78 °C dry ice-acetone bath, is added via cannula, n-BuLi (2.5 M in hexane, 170 mL, 425 mmol) is then added drop-wise via cannula at a rate such that the internal temperature does not rise above -65 °C. After completion of the addition (roughly 2 h on this scale), the cooling bath is removed and the reaction mixture is allowed to warm until the internal temperature reaches -50 °C for exactly 15 min and then is immediately recooled to -78 °C. Triisopropylborate (80.0 g, 98.2 mL, 425 mmol) is then added dropwise via cannula to the ( )-crotylpotassium solution at a rate such that the internal temperature does not rise above -65 °C. On this scale the addition time was approximately 2 h. After the addition is complete, the reaction mixture is maintained at -78 °C for 10 min and then rapidly poured into a 2-L separatory funnel containing 800 mL of 1... 

Firstly, fibers were dried in an oven at 50 °C for 3 h. The PP was also dried at the same temperature, but for Ih. Pahn fibers (5wt/wt%) were mixed with PP (94wt/wt%) and MAPP (1 wt/wt%) in a thermokinetic mixer, with speed rate maintained at 5250rpm, in which fibers were responsible for 5wt% of the composition. After mixing, composites were dried and ground in a mill. Thereafter, composites were placed in an injector camera at 165 °C and 2°Cmin" heating rate. The melted material was injected in a pre-warmed mold (165 °C) of the required dimensions to obtain an impact... 

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