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Karnik, M. G.
- Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board Part XI - Chemical Pulps from Andropogon contortus, Linn.(Kusal Grass)
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Indian Forester, Vol 78, No 7 (1952), Pagination: 331-338Abstract
Laboratory experiments on the preparation of chemical pulps by the soda and sulphate processes from Andropogon contortus, Linn., syn. Heteropogon contortus (Linn.) Roem. and Schult. (kusal grass) are described. Higher quantities of chemicals are required for the production of pulps from this grass than from sabai grass (Eulaliopsis binata). The pulps from this grass are short-fibred and, therefore, may require to be used in admixture with a long-fibred pulp such as sabai grass or bamboo pulp for the production of writing and printing papers. The economic utilization of this grass for the manufacture of paper will depend upon the price at which it will be available at factory site.
- Indigenous Cellulosic Raw Materials for the Production of Pulp, Paper and Board - Part XX - Chemical Pulps from Eupatorium odoratum Linn. (Assam-lota)
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Indian Forester, Vol 80, No 5 (1954), Pagination: 277-284Abstract
Laboratory experiments on the sulphate pulping of Eupatorium odoratum (Assam-lota) are described. Assam-lota is short-fibred. Taking into consideration the yields of bleached pulps obtained under conditions found best among those studied, the total quantities of chemicals required for digestion are high. The bleach requirement is very high. Assam-lota does not seem to be an economical fibrous raw material for the production of white writing and printing papers.- Varieties of Paper
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Indian Forester, Vol 82, No 4 (1956), Pagination: 203-205Abstract
No abstract- Chemical Pulps and Writing and Printing Papers from Sabai Grass (Eulaliopsis binata Retz.)
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Indian Forester, Vol 86, No 7 (1960), Pagination: 423-431Abstract
Laboratory experiments on the production of chemical pulps by the soda and sulphate processes from sabai grass (Eulaliopsis binata Retz.) are described. Results of experiments on the bleaching of sabai grass pulp are also included. Six pilot-plant trials on the preparation of writing and printing papers from this grass are described. Three samples of printing papers made from sabai grass are appended to this publication.- Edible Katha-Preliminary Observations on its Quality and Specifications
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Indian Forester, Vol 90, No 1 (1964), Pagination: 27-29Abstract
No abstract- Studies in Oils of Indian Eucalyptus citriodora
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Indian Forester, Vol 90, No 3 (1964), Pagination: 176-178Abstract
No abstract- Maple Wood (Acer caesium) for Tooth Pick-industry
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Indian Forester, Vol 90, No 5 (1964), Pagination: 310-311Abstract
Treatments to remove the bitterness of the Maple wood (Acer caesium) have been tried to make the wood suitable for Tooth-pick industry. Boiling with water has been found to be the best treatment.- Note on Metallic Vessels for the Manufacture of Edible Katha from Khair Trees
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Indian Forester, Vol 90, No 6 (1964), Pagination: 383-384Abstract
No abstract- Pine Needle Oil from Pinus roxburghii
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Indian Forester, Vol 90, No 12 (1964), Pagination: 826-829Abstract
The oils obtained by water and steam distillation of pure needles, pure twigs, and twigs with needles of Pinus roxburghii have been studied. The oils were examined for specific gravity, optical rotation, refractive index, acid and ester values and esters calculated as bornyl acetate. The oil obtained from pure needles has the highest ester value and appears to be better in quality.- A Process to further the Utilisation of Khair Trees
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Indian Forester, Vol 91, No 1 (1965), Pagination: 67-69Abstract
Two-stage extraction process for the production of katha from Acacia catechu is described. Yields and Catechin content of the extracts have been determined. Cold extraction yields crude katha and subsequent hot extraction for shorter period yields refined product.- A Note on Origanum vulgare Seed Oil
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Indian Forester, Vol 91, No 2 (1965), Pagination: 104-105Abstract
The oil of Origanum vulgare seeds obtained by petroleum ether extraction has been examined for its percentage yield and chemical characteristics.- Litsea glutinosa Bark as Binder for Briquetting and other Allied Industries
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Indian Forester, Vol 91, No 8 (1965), Pagination: 591-592Abstract
no abstract- Chemical Examination of Bark of Terminalia paniculata Roth
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Indian Forester, Vol 91, No 10 (1965), Pagination: 748-750Abstract
Analyses of Teminalia paniculata Bark shows that it is made up to 27 per cent of extractives that can be removed by slIccessive extraction with petroleum ether, ch1oroform, alcohol and water, 28 per cent of carbohydrate, 33 per cent of 'lignin' and 9.6 per cent of ash. The bark does not contain any alkaloids. It contain. 14 per cent of tannins, which have a pyrogallol nucleus in the molecule rather than a catechol nucleus along with gallic acid . β-sitosterol has been isolated and identified from the petroleum ether extract of the bark.- Pilot Plant Production of Katha and Cutch from Khair Tree Acacia catechu Willd.
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Indian Forester, Vol 91, No 11 (1965), Pagination: 778-780Abstract
The article describes pilot plant trials of the two stage process of Katha and Cutch production recently developed in the Chemistry of Forest Products Branch of this Institute (Indian Forester, 1965,91 (1), 67). Total yield of katha and cutch obtained are 9.35 per cent and 5.66 per cent respectively on the oven dry weight of the heartwood.- A Note on Gurjan Oil from Dipterocarpus griffithii Miq.
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Indian Forester, Vol 91, No 12 (1965), Pagination: 864-866Abstract
no abstract- Hydrolytic Studies on Fir (Abies webbiana) and Spr Uce (Picea smithiana)
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Indian Forester, Vol 92, No 1 (1966), Pagination: 59-60Abstract
The partial and total saccharification of the fir and spruce woods were carried out using sulphuric acid as hydrolysing agent. The potential reducing sugar yields and the constituent sugars were determined.- Studies on the Suitability of Origanum vulgare Seed Oil in Paint and Varnish Industry
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Indian Forester, Vol 92, No 4 (1966), Pagination: 218-220Abstract
Drying properties of Origanum vulgare seed oil are described.- Preliminary Investigation on the Essential Oil of Boenninghausenia Albiflora (hook) Reichb
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Indian Forester, Vol 92, No 5 (1966), Pagination: 295-295Abstract
no abstract- Seasonal Variation in Pine Needle Oil from Pinus roxburghii
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Indian Forester, Vol 92, No 8 (1966), Pagination: 521-522Abstract
Variations in the oil content and physico-chemical properties of the pine needle oil from Pinus roxburghii with the month of harvesting the needles have been studied. The period November-January has been found to be most suitable for harvesting the needles for the distillation of essential oil.- Sal Bark - Shorea robusta Gaertn. : Its Commercial Potentialities
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Indian Forester, Vol 94, No 3 (1968), Pagination: 253-258Abstract
The studies have been made to explore the commercial potentialities of sal bark (Shorea robusta Gaertn.). The bark was analysed for ash, tans, non-tans and colour of the extract. Tannins were isolated under different temperatures and periods of extraction. Spray-dried tan extract was analysed for ash, tans, non-tans and colour intensity. Proximate chemical analysis of the spent bark was carried out. To isolate cellulose from the spent sal bark, the material was cooked under pressure in an alkaline medium of sod. Hydroxide and a mixture of sod. Hydroxide and sod. Sulphide and the resultant cellulose was subjected to usual bleaching process using bleaching powder. Yield of the bleached cellulose obtained was 80.03 per cent. The bleached cellulose was then analysed for its major chemical constituents. A sample of this cellulose was sent to the Institute of Paper Chemistry, Appleton, U.S.A. for data on x-ray electronmicrograph and viscosity and this data is incorporated in the article. Briquettes of saw dust and coal dust were made using alkali lignin recovered after digestion of the spent bark, as a binder. The briquettes were found to have good resistance to handling. Probable industries where sal bark can be profitably utilized are indicated.- Note on Composition of Origanum vulgare Seed Cake
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Indian Forester, Vol 94, No 4 (1968), Pagination: 344-345Abstract
The seed cake left after the extraction ef oil from Origanum vulgare seeds has been analysed. The cake is found to be rich in Nitrogen content and is reported to be suitable as a fertilizer.- The Proximate Chemical Composition of Barks of Some Indian Trees: Part I
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Indian Forester, Vol 96, No 4 (1970), Pagination: 314-317Abstract
The barks of the woods of Tectona grandis, Adina cordifolia, Anogeissus latifolia, Lagerstroemia parviflora, Cleistanthus callinus, Pterocarpus marsupium and Bosvellia serrata received from the Forest Utilisation Officer, Maharashtra State were analysed for tannins, cold water solubility, hot water solubility, ash, peat, ether extractives, alcohol benzene extract, pentosans,lignin and chlorite holocellulose content following standard methods. The barks were also tested qualitatively for starch and alkaloids. The results are reported in the article.- Note on Composition of Sapindus mukorossi Kernel Cake
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Indian Forester, Vol 96, No 5 (1970), Pagination: 410-411Abstract
The seed cake left after the extraction of oil from the kernels of Sapindus, ukorossi Gaertn. (soap nut) has been analysed. The cake is found to be rich in Nicrogen content. Qualitative tests indicated the presence of alkaloids and starch in the cake. The teste for tannins and sugars were negative. The results of the analysis are presented in the note.- Terminalia tomentosa Bark; its Commercial Potentialities
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Indian Forester, Vol 96, No 8 (1970), Pagination: 612-620Abstract
The studies have been made to explore the commercial potentialities of the bark of Terminalia tommtosa. The bark was analysed for Tans, Non-tans and colour of the aqueous extract. The bark was also analysed for ash, cold and hot water solubles, Alcohol/Benzeae aad pet. ether solubility, Pentosans and Lignin. The inorganic constituents of the ash of the original bark as well as that of water extracted bark were determined. Pilot plant experimeats to collect the spray dried aqueous extract were conducted and this extract was analysed for Moisture, Ash, Tans and Non-tans and the colour intensity. The laboratory experiments on the dyeing performance of the aqueous extract were carried out. The samples of this extract were also sent to (1) Indian Jute Industries Research Association, Calcutta, (2) Indequip Limited, Ahmedabad, (3) The Govt. Institute of Textile Chemistry and Knitting Technology, Ludhiana and (4) Wood Preservation Branch, F.R.I., Dehra Dun for their evaluation on dyeing performance of this extract. The extracts of their reports are reproduced in this article. The dye extract has been found suitable as a Cheap dye for dyeing cotton, wool, silk and jute fabrics. Further experiments were carried on the exhausted bark to isolate the Oxalic Acid. The Oxalic Acid of 97.2% purity in a yield of 20% could be obtained. Sample of this acid was seat to Glaxo Laboratory, Bombay who have found it suitable for their requirement. Probable industries where the bark of T. tomenlosa can be profitably utilised are indicated.- Further Studies on Distillation and Utilisation of Oleo-gum-resin of Boswellla serrata (Roxb.) (Salai)
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Indian Forester, Vol 96, No 11 (1970), Pagination: 843-848Abstract
Salai (Boswellia serrata Roxb.) gum was distilled by two processes, viz., (1) Steam distillation and (2) Solvent extraction followed by steam distillation and the three components, viz oil, gum and rosin were separated. The components were analysed for their physico-chemical properties. Experiments were also carried out to explore the possibilities of utilizing the Component,parts industrially and the possible uses are indicated. The results are described in the article.- Studies in the Chemical Composition and Possible Utilities of Soap-Nuts (Sapindus mukorossi Gaertn.)
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Indian Forester, Vol 97, No 8 (1971), Pagination: 462-466Abstract
The pericarp and the shell of soap-nut fruits have been chemically analysed. The pericarp has been found to contain water solubles as high as 74.20% while shells have been found to be rich in crude fibre. The kernels on expulsion yielded 24.0% and on solvent extraction 38% of the oil. Samples of soap were prepared using this oil. The exhausted cake was used as a filler in the soap preparation. The pericarp powder and the samples of soap prepared were found to have good cleaning properties.- Acacia catechu(khair) Sap Wood: its Possible Commercial Utilisation
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Indian Forester, Vol 97, No 9 (1971), Pagination: 537-541Abstract
The studies have been made to explore the possible commercial utilization of Sap I wood of Khair. The Sap wood was analysed for its major chemical constituents and the optimum conditions to isolate cellulose suitable for cellulose based industries have been described. The chemical composition of the cellulose and its fibre dimensions have been determined. The experiments were undertaken to prepare cellulose gum and the data on its evaluation are presented in the article.- Note on Catechin of Acacia catechu (Khair Wood) and Effect of some Food Additives on its Coloured Solutions
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Indian Forester, Vol 99, No 3 (1973), Pagination: 149-151Abstract
Physico-chemical properties of catechin isolated from khair heartwood and the effect of chemical reagents generally used as food additives on the colour of catechin solutions are described.- Studies on the Utilization of Spent Heartwood of Acacia catechu (Khair)
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