摘要:

Lycopodium cernuumL., has yielded a new alkaloid, cernuine (L32), C16N26ON2, nicotine, and an uncharacterized base (L33). Lycopodine could not be isolated.

ISSN:1923-4287    

DOI:10.1139/cjr48b-001

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

An investigation of the reaction of hydrogen atoms with butadiene was made at 28° and 252 °C. by the Wood–Bonhoeffer method. Ethane was the main product, with butane, butene, propane, and methane occurring in smaller concentrations. Trace amounts of propylene and acetylene were also found. Temperature had little effect on either the nature or the relative proportions of the products. A possible mechanism for the reaction is outlined.

ISSN:1923-4287    

DOI:10.1139/cjr48b-002

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

Vanillin has been condensed with certain nitroparaffins to produce four compounds with indicator properties. The benzoyl derivatives of two of these were also synthesized. The color change, pH range, and indicator constant were measured for each of the four indicators.

ISSN:1923-4287    

DOI:10.1139/cjr48b-003

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

The reactions of diethylenetriamine and hydroxyethylethylenediamine with copper (II) and nickel (II) chloride and bromide have been shown to give a variety of stable, highly crystalline products. With diethylenetriamine (dn), the two metals behaved in a parallel manner, either one or two 'dn' molecules co-ordinating to the metal, thus confirming the deductions of others from spectrophotometric work. With hydroxyethylethylenediamine (hn), either one or two 'hn' molecules co-ordinated with copper, and three with nickel.

ISSN:1923-4287    

DOI:10.1139/cjr48b-004

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

The apparent density of the adsorbate and the adsorption isotherm have been measured in the systems carbon tetrachloride – charcoal and diethyl ether – charcoal. In both, the apparent density of the adsorbate is lower than the normal liquid density. These abnormally low values cannot be explained on the basis of the coexistence of 'vapor' and 'liquid' adsorbed phases. The results are consistent with the concept of the adsorbatc's blocking-off a portion of the internal voids of the charcoal. The Langmuir equation represents the isotherm only when the quantity adsorbed exceeds two-thirds of the saturation value. The Harkins–Jura equation is valid at low relative pressures in the carbon tetrachloride – charcoal system, but not in the diethyl ether – charcoal system. Neon is adsorbed appreciably on charcoal at 25 °C. and therefore cannot be employed to examine the effect that the gas being used for the measurements has on the apparent density of the adsorbate. Until more accurate data are available for the adsorption of helium on charcoal, both in the absence and presence of other adsorbates, the density of charcoal and the density of the adsorbate measured by helium displacement remain suspect. In view of the uncertainties, the utility of apparent density values of adsorbates in checking the concepts of the various theories of physical adsorption is limited.

ISSN:1923-4287    

DOI:10.1139/cjr48b-005

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

The flow rates of gases and vapors through highly activated charcoal rods have been measured. The results obtained indicate that a new phenomenon has been discovered. While the flow rates of gases that are not highly adsorbed can be satisfactorily correlated by the Adzumi equation and other equations of similar mathematical form, it has been found that the strongly adsorbed vapors of diethyl ether and ethyl chloride pass through the charcoal rods at rates considerably m excess of those required by known equations. To explain the results it appears necessary to resort to mechanisms quite outside of those usually considered in the application of kinetic theory to problems associated with passage of gas through porous diaphragms. The simplest and most direct of such mechanisms involves mobility of the adsorbed material. It is particularly striking that the flow rate of diethyl ether through activated charcoal rods has been found to be greater than that of helium in pressure regions where relative rates of flow of gases through non-adsorbing porous diaphragms are dominated by inverse square root molecular weight ratios. The measurement of gaseous flow rates through porous media are rendered the more difficult where appreciable adsorption occurs. The experimental methods are described in detail, sources of error are discussed, and results presented for the gases helium, hydrogen, nitrogen, carbon dioxide, diethyl ether, and ethyl chloride.

ISSN:1923-4287    

DOI:10.1139/cjr48b-006

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

not available

ISSN:1923-4287    

DOI:10.1139/cjr48b-007

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

The process of gelatinization of nitrocellulose in a mixed solvent consisting of 80% glyceryl trinitrate and 20% ethylene glycol dinitrate by weight has been followed by using a commercial electrophotometer. The light scattered and absorbed by the colloid in its solvent was found to be dependent on the amount of nitrocellulose undissolved by the solvent at any time. The rate of gelatinization and the presence of insoluble fibers were related to the method of nitration and to the treatment of the raw material for nitrocellulose.

ISSN:1923-4287    

DOI:10.1139/cjr48b-008

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

not available

ISSN:1923-4287    

DOI:10.1139/cjr48b-009

出版商:NRC Research Press    

年代:1948

数据来源: NRC

摘要:

The dehydration of butanediol-1,3 over activated Morden bentonite was investigated. At 250° to 350 °C., the organic liquid products consisted mainly ofn-butyraldehyde, butene-3-ol-1, and then-butyral of butanediol-1,3. Formaldehyde was dissolved in the liquid products and considerable carbon was deposited on the catalyst. The gaseous products consisted of propene and butadiene-1,3, the maximum butadiene yield being 29%. Butanediol-1,4, over the bentonite catalyst, was converted to tetrahydrofuran in almost theoretical yields at 250° to 300 °C. At higher temperatures, 400° to 500 °C., gaseous decomposition occurred, the main products being propene and formaldehyde. Only traces of butadiene-1,3 were formed from the dry glycol while an 8% diolefin yield resulted using water as diluent.

ISSN:1923-4287    

DOI:10.1139/cjr48b-010

出版商:NRC Research Press    

年代:1948

数据来源: NRC