scholarly journals APPLICATION OF THE CERIC SULPHATE METHOD IN THE ANALYSIS OF CARBOHYDRATES IN THE ROOTS OF LEPIDIUM AND CONVOLVULUS

1939 ◽  
Vol 14 (2) ◽  
pp. 285-296
Author(s):  
C. G. Barr
Keyword(s):  
Ceric Sulphate

scholarly journals Phytochemical Screening and TLC Profile of Fruits and Flowers of Alstonia venenata R. Br.

2016 ◽  
Vol 8 (02) ◽  
Author(s):  
Thomas S. K. ◽  
George E. ◽  
Kunjumon M. ◽  
Thankamani I.
Keyword(s):  
Petroleum Ether ◽  
Dry Weight ◽  
Stem Bark ◽  
Phytochemical Analysis ◽  
Root Bark ◽  
Good Resolution ◽  
Peninsular India ◽  
Spray Reagent ◽  
Hexane Extracts ◽  
Ceric Sulphate

Alstonia venenata R. Br. belonging to the family Apocynaceae is a tall evergreen shrub distributed throughout Peninsular India. Stem-bark, root-bark, fruits and leaves are used by many tribal communities and also in Ayurveda. The study investigates the phytochemical composition of hexane, butanol, methanol and water extracts of Alstonia venenata fruits and flowers as well as the TLC profile of hexane extracts of fruits and flowers. Quantitative data of the wet and dry weight, yields from different solvent fractions and percentage yields were noted. The phytochemical analysis revealed the presence of secondary metabolites such as alkaloids, steroids, terpenoids, saponins, flavonoids, tannins and phenolic compounds from the various extracts. Alkaloids were present in all the fractions tested. Methanol extracts of fruits and flowers showed the presence of major phytoconstituents. TLC profile of hexane extracts of fruits and flowers were developed using anisaldehyde sulphuric acid/ceric sulphate (steroids/terpenoids) and Dragendorff’s spray reagents (alkaloids). Petroleum ether: Chloroform: Methanol (5: 4.5: 0.5) showed good resolution for the hexane extracts of fruit and flower when treated with Dragendorff’s spray reagent. Petroleum ether: Chloroform (1:1) was best for the hexane exacts of flowers and fruits when sprayed with ceric sulphate spray reagent

The effects of high dose rates of ionizing radiations on solutions of iron and cerium salts

1960 ◽  
Vol 255 (1283) ◽  
pp. 490-508 ◽  
Keyword(s):  
Hydrogen Peroxide ◽  
Dose Rate ◽  
Ferrous Sulphate ◽  
High Dose ◽  
Oh Radicals ◽  
Dose Rates ◽  
Reaction Zones ◽  
Constant Dose ◽  
Ceric Sulphate ◽  
Ionizing Radiations

The electron beam generated by a 15 MeV linear accelerator has been employed to induce reactions in aerated aqueous solutions of 1 to 25 mM ferrous sulphate, and of 0⋅1 to 1 mM ceric sulphate. The radiation was delivered in pulses of 1⋅3 μ s duration and over a range of dose rates from 0⋅5 to 20000 rads/pulse. Radiation yields at constant dose rate were compared with the aid of a chemical dose monitor. A system of two thin, widely spaced, irradiation vessels was employed to determine the variation of yield of any one system over successive known ranges of dose rate. The yield of ferric sulphate in the iron system was found to decrease with increasing dose rate in the range 0⋅01 to 10 krads/pulse by an overall factor of 0⋅85, and was appreciably dependent on the initial concentrations of dissolved oxygen and of ferrous sulphate at high dose rates. Yields of hydrogen and of hydrogen peroxide were practically independent of dose rate. The observations have been interpreted on the basis of inter-radical reactions which occur when the reaction zones of neighbouring clusters overlap. The following reactions can account for all the data: OH + Fe 2+ → Fe 3+ + OH ¯ , (1) H + O 2 → HO 2 , (2) H + OH → H 2 O. (7) The values k 1 / k 7 = 0⋅0062, and k 2 / k 7 = 0⋅22 are reasonably consistent with the observations. In the ceric sulphate system the yield of cerous sulphate increases progressively over the range 0⋅01 to 10 krads/pulse by an overall factor of 1⋅4. The data accord with the view that at high dose rates OH radicals react with them selves ultimately to form hydrogen peroxide, in competition with their normal reaction with cerous sulphate.

The decomposition and analysis of chrome spinel. A survey of some published techniques

1972 ◽  
Vol 38 (299) ◽  
pp. 882-889 ◽  
Author(s):  
K. A. Rodgers
Keyword(s):  
Chrome Spinel ◽  
Ceric Sulphate

SummaryExamination of published procedures for the decomposition and subsequent analysis of chromite and chrome ores shows some to be unnecessarily complicated and time consuming. Others fail to yield consistent and reproducible results. Decomposition is rapidly and effectively accomplished using the peroxide frit technique of Rafter. Chromium may then be removed and determined volumetrically allowing the rest of the analysis to proceed along conventional silicate lines. Fe2+ is determined by oxidimetry following digestion with a mixture of phosphoric and sulphuric acids in the presence of ceric sulphate.

Glow-discharge electrolysis on ferrous and ceric sulphate solutions

1976 ◽  
Vol 67 (2) ◽  
pp. 191-199 ◽  
Author(s):  
Gian-Antonio Mazzocchin ◽  
Gino Bontempelli ◽  
Franco Magno
Keyword(s):  
Glow Discharge ◽  
Ceric Sulphate ◽  
Glow Discharge Electrolysis

Aphrodisiac Activity of Cocos nucifera Attentuates Ceric Sulphate Induced Infertility in Male Rats

2015 ◽  
Vol 1 (2) ◽  
pp. 62-68 ◽  
Author(s):  
Ramakrishnan Prakash ◽  
Rajulu Dheeraj ◽  
Palayan Muralidharan ◽  
Krishnan Karthickeyan ◽  
Raji Vijayakumar ◽  
...  
Keyword(s):  
Cocos Nucifera ◽  
Male Rats ◽  
Ceric Sulphate
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