Nitrogen gas atmosphere

Similarly, the oxidation of iodocyclohexane by DMD under a nitrogen-gas atmosphere leads to the iodohydrin and diol as unexpected products (equation 24). The iodohydrin, formed as the major product, clearly reveals that hypoiodous acid (HOI) is generated in situ, which adds to the liberated cyclohexene. Indeed, when methyl iodide (Mel) is oxidized by DMD at subambient temperature in the presence of cyclohexene, the corresponding iodohydrin is obtained in very good yield The latter method may be utilized for the preparation of allylic alcohols with a vinylic iodo functional group from allenes (equation 25) . ... 

The alkylation is achieved using an acid activated clay catalyst (73). The reaction is performed in nitrogen atmosphere. Namely, nitrogen gas atmosphere or other inert gas atmospheres, in contrast to air gas atmosphere, suppress the formation of products that deactivate the clay catalyst. 

Three milhgrams apiece of the Step 1 and Step 2 products were dissolved in 10 ml of water and 1 ml of methanol by heating the solution to 70°C. This mixture was then treated with tetraethoxysUane (20 mg) followed by benzylamine (6 mg). A gel that formed during gradual cooling of the mixture stood uninterrupted at ambient temperature for seven days. The sample was then sintered in a nitrogen gas atmosphere first for two hours at 200°C and then for four hours at 500°C, and metal oxide nanotubes were isolated. 

Ny for several metal nitrides are listed in Table II together with their decomposition temperature under nitrogen gas atmosphere. The temperature of... 

The experimental set-up was common for all three metal ions. It included the mixing, under a nitrogen gas atmosphere, of a (0.5 - 1) x 10 M radioactively labelled metal ion solution with a 0.015 to 0.08 M solution of Se(- II) at different pH. After equilibration for five days the solid formed was separated from the aqueous phase by means of a sintered glass filter of undefined pore size. The aqueous phase was analysed with respect to pH (glass electrode), pMe (Ag and Hg, ion selective electrode), [Me(aq)],ot (y-ray scintillation) and [Se(- II)] (iodometric titration). 

Based on sturdy composite materials comprising metallic tungsten and aluminum nitride, we fabricated a AIN/W FGM approximately 0.5 mm thick in which the amount of metallic tungsten added was changed in stages by a normal sintering method in a nitrogen gas atmosphere ( at 1 atm ). 

Sephadex samples of approximately 1 g were weighed (1.000 g =. 5154 . 0015 meq of H) into approximately 20-25 mL of 0.05M and 0.03M NaPSS solution (mol wt 50,000 and 500,000, respectively). These samples, covered by a nitrogen gas atmosphere, were then neutralized with standard base to define an a range of study from 0.1 to 0.9. 

The polymer-blend dispersions of PTFE and fluorinated-pitch with various concentration of fluorinated-pitch have been coated on stainless steel (SUS-304). The various coated polymer-blend were heat-treated at 350 °C 5 °C for 30 minutes. Further, samples were subjected to EB irradiation with a 200keV from EB accelerator (CURETRON , NHV Corporation) up to 1000 kGy at 330 °C 3 °C in nitrogen gas atmosphere. 

For mechanical test such as tensile test and flexural test, the impregnation of polymer-blend to the carbon fiber was carried out several soakings of the fiber in the polymer-blend dispersion consists of PTFE (98.2 wt%) and fluorinated-pitch (1.8 wt%). A sheet of chemical crosslinked pre-forming sample was prepared under the pressure at around 20 MPa and then heat-treated at 350 °C 5 °C for 30 minutes. Samples were irradiated by EB up to 1000 kGy at 335 °C 3 °C in nitrogen gas atmosphere. 

The ERD operates with a nitrogen gas atmosphere the batch MPT uses nitrogen purge gas at the end of each decontamination cycle. Consequently, work areas will require monitoring for oxygen deficiency to preclude asphyxiation during normal and maintenance operations. 

The MEDUSA has been used as a regular part of plant maintenance and operation since 1990, and it is useful to detect anomalies and to diagnose their causes. As an example of vibration monitoring in JOYO, the vibration level of a cooling blower suddenly increased by a factor of ten on December 1992. This blower is placed in a nitrogen gas atmosphere and cannot be repaired while the reactor is operating. 

The thermal behavior of control PU and its composites were determined using a Perkin Elmer Model DSC-7 differential scanning calorimeter interfaced to Model 1020 controller. The samples were analyzed from room temperature to 250°C (as PU decomposed at a temperature more than 250°C) at a heating rate of 10°C/min. the standard aluminum pan is used to analyze about 10 mg samples under nitrogen gas atmosphere. 

Thermally Activated Transformation of Gallium Nitrate The complete or partial thermal decomposition of metal nitrates is commonly used for the preparation of oxides. The thermal treatment of gallium nitrate, Ga(N03)3-3c H2O, leads to formation of the pure oxide in an inert gas atmosphere [239] and to the pure nitride when the reaction is carried out in a reducing gas atmosphere [231]. In order to explore the decomposition of Ga(N03)3 x H2O as a function of temperature in a nitrogen gas atmosphere, Berbenni et al. combined thermal analysis with Fourier transform infrared (FTIR) spectroscopy, suggesting a mechanism that proceeds in three main steps, as displayed in Eqs. (1) to (3) [239]. 

Polymer synthesis. All reactions are carried out in glassware that is dried under a dry nitrogen gas atmosphere. Details of the homopolymer synthesis (poly-5, poly-6 and poly-7) have been described in previous papers. Addition of a catalytic amount of 18-crown-6 and 15-crown-5 to most reactions of dialkyldichlorosilanes with sodium in hot toluene leads to reproducible high yields of HMW polysilanes with a monomodal distribution. However, several alkyl-3,3,3-trifluoropropyldichlorosilanes are exceptions and do not produce the corresponding homopolymers when crown ethers are present in the reaction mixture (Chart 13.25). 

Dissolve the PEG-bound urea (500 mg) in 5 mL 1% KCN-methanol solution, and stir the reaction mixture overnight at room temperature uuder nitrogen gas atmosphere. Precipitate the MeO-PEG-OH from the homogeneous solution by adding 25 mL cold diethyl ether. 

Dissolve the resulting PEG-bound benzimidazolone-2-one 13 in 5 mL dichloromethane, to this add 10 eq sodium hydride and 2 eq alkyl halide, and stir the reaction mixture at room temperature for 10 h under nitrogen gas atmosphere (see Note 10). 

To this flask, add PEG-bound diamine 500 mg, 5 mL dichloromethane, triethyl amine (5 eq), and thiophosgene (3 eq) stir the resulting homogeneous solution at room temperature for 8 h under nitrogen gas atmosphere. 

Every reaction should be carried out in nitrogen gas atmosphere. 

Monoglycerides are widely manufactured by the glycerolysis of vegetable oils or animal fats at high temperatures (approximately -210-250 °C) using an inorganic alkaline catalysts under nitrogen gas atmosphere [108]. 

When AIN was introduced for electronic packaging applications in 1985 it was considered inconsistent in properties. This inconsistency was due to problems with the AIN powders used to make sintered products. The powders were made by either of two methods direct nitridation of aluminum metal in a nitrogen gas atmosphere or carbothermal reduction of alumina, which involves the decomposition of the reaction product of aluminum trichloride with ammonia. The first process was cheaper, but the resultant powders were not especially well suited to materials for electronic applications. The carbothermal process produces powders of greater uniformity and purity, with greater control over size and shape, than the nitridation process, and is the more widely used process today." ... 

Powder X-Ray Diffraction (XRD) In order to investigate into the crystalline modification of the generated API crystals and their solid dispersions, crystallographic analysis was carried out by means of powder diffraction. These measurements were carried out with a Phillips wide and small angle X-ray diffractometer under nitrogen gas atmosphere. The XRD measurements of the powder samples were repeated after a certain time in order to ensure that the generated polymorphic form of PCM is stable. 

The impregnated spheres were pyrolyzed nnder a stagnant inert nitrogen gas atmosphere in a quartz tube reactor (Thermolyne 21100 furnace). The heating rate was 5°C/min and the samples were treated for 3 h. at temperatures between 500°C and 800°C with consecutive 100°C increments. 

Vaccum (including seal after vacuum) Air atmosphere Helium-gas atmosphere Nitrogen-gas atmosphere Oxygen gas, () indicates pressure... 

A series of TPU-CNF and TPU-CNFOX composites were synthesized following a two-step polymerization procedure. Stoichiometric amounts of MDI and PCL were reacted at 80°C under nitrogen gas atmosphere for 150 min to produce a prepolymer. In a second step, 80 g of molten prepolymer were hand-mixed with a proper amount of CNF or CNFOX, 6.5 g of BDO, and the catalyst. Mole ratio of 6 1 5 of MDI PCL BDO was used producing 33 wt. % of hard segments. The mixtme was pomed in a chaotic mixer preheated at 110 °C, and mixed for 5 minutes. TPU composite materials were collected, and compression molded at 220 °C. Neat TPU and composite systems were then kept at room temperature for further analysis. 

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