Washing fluids, mixed

Intensive mixing of contaminated soil with washing fluid... 

A very concentrated HgTeOg solution (p. 451) Is mixed at room temperature with slightly more than the stoichiometric quantity of fuming hydrlodlc acid (d 2.00). A heavy, gray precipitate of Tel Immediately separates. It Is suction-filtered on a fritted glass filter and freed of traces of hydrlodlc acid by pressing on clay. Concentration of the mother liquor at room temperature yields a considerable additional amount ofthe compound. When dry, the crystals are washed several times with pure CCl to remove Iodine and are finally pulverized under CCl until the continuously renewed wash fluid no longer Is colored. The product Is then analytically pure. 

The bitumen layer from the experiment at 80°C and 15 min mixing time on top of the tar sand and from the rest of the sand were harvested and extracted with THE Vanadium contents were also obtained from these two bitumen sources and from the tar sand source. For the tar sand, bitumen was also extracted by repeated washings of THE followed by drying of the THE from the wash fluids. One gram of... 

A range of reaction vessels are available to enable synthesis scales ranging from 0.005 to 1.0 mmol (3 ml reaction vessel for 0.005,0.010, and 0.025 mmol 10 ml reaction vessel for <0.1 mmol 40 ml reaction vessel for <0.25 mmol 55 ml reaction vessel for <1.0 mmol). Different sizes of reaction vessels are required to enable resin swelling and efficiency of washing steps. Mixing in the reaction vessel occurs by vortex agitation that allows for efficient resin-fluid interaction. 

First,freshly isolated lymphocytes obtained from a normal person were preincubated in 3H-hypoxanthine containing mediim, and then washed out several times. The last washing fluid was shown to contain no measurable radioactivity by liquid scintillation counting. The preincubated normal lymphocytes were then mixed with an approximately equal amount of untreated lymphocytes obtained from a Lesch-Nyhan patient. The cells were spun down to assure cellular contact. The cells were then fixed, treated with cold TCA, stained with or-ceine and subjected to autoradiography. 

The toluene solution from the previous step was treated with an ethanol solution of NaOEt (0.1 mol in 100 ml) at O C. When about a quarter of the solution had been added a thick precipitate formed and ether (100 ml) was added to maintain a fluid slurry. The remainder of the NaOEt was added and the slurry was stirred overnight. The solid was collected and w ashed with ether. It was then mixed with ether (200 ml) and 2NHC1 (75 ml) and shaken in a separatory funnel until the solid dissolved. The ether layer was washed with 2NHHC1 (2 X 50ml) and water and dried over MgS04. The solution was decolorized with Magnesol and evaporated to give the a-nitro ester as a red oil. 

Several unit processes can be used in the washing process. The soil is mixed with washing agents and extraction agents that remove the contaminants from the soil and transfer them to the extraction fluid. The soil and washwater are then separated. The soil can be further rinsed with clean water. The soil is removed as clean product, ready to put back into the original excavation, and the washwater is ready to be treated by conventional wastewater treatment processes as addressed in the next subsection. 

Borax decahydrate is produced from borate ores, primarily colemanite and also from dry lake brines. When produced from its ore, the ore is crushed and then blended with B2O3. The blend is mixed with hot recycle liquor in a dissolving plant. Rock and clay particles from the liquor are removed over vibrating screens. The hquor is then fed to thickeners for settling of insolubles after which the underflow mud is washed with water. The strong liquor of borax hydrates is then pumped into continuous vacuum crystallizers for the separation of the pentahydrate first and then the decahydrate. The products are dried in rotary or fluid bed driers. 

Folkloric medicine has led many scientists to discover important plant-derived medicines. It has been known for some time that the seeds of several Annonaceous species have an emetic property (Morton, 1987). Eli Lilly, Inc. in 1898 sold a fluid extract made from paw paw seeds A. triloba) for inducing emesis (Anonymous, 1898). Folkloric uses of Annonaceous species also suggest pesticidal properties. The Thai people use extracts of Annona squamosa, A. muricata,A. cherimolia, and A. reticulata for the treatment of head lice (Chumsri, 1995). For this, 10 to 15 fresh leaves of A. squamosa L. are finely crushed and mixed with coconut oil, and the mixture is applied uniformly onto the head and washed off after 30 min. 

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