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Gupta, R. C.
- Volatiles of Taxus baccata L. as Attractants in Control of a Destructive Insect Pest Bactrocera cucurbitae Coquillett
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Indian Forester, Vol 135, No 11 (2009), Pagination: 1594-1597Abstract
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- A Preliminary Note on Compression Loss in Plywood
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Indian Forester, Vol 109, No 3 (1983), Pagination: 159-163Abstract
It is natural that plywood gets compressed under certain pressing conditions, but the data regarding Indian species of wood is not available. The present note evaluates tbe Compression loss in plywood made from Mangifera indica and Terminalia myriocarpa for a few pressing conditions and thickness of plywood. This knowledge may be useful to the industry to evalnate the final thickness of plywood produced by tbem from veneers.- Hot Setting Animal Glue Composition for Tea-chest Plywood
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Indian Forester, Vol 108, No 7 (1982), Pagination: 487-489Abstract
The paper incorporates the results obtained using a hot setting animal glue composition for lea-chest plywood. The results indicate that the glue composition suggested here is sa tisfadory for making tea-chests and could meet their requirements as per IS : 10 (Part I) 1976. The suggested method envisages a reduction in the cost of gluing to about 25 per cent against the cost of gluing using Urea-formaldehyde.- Role of Extractives in the Development of Bond Strength
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Indian Forester, Vol 106, No 8 (1980), Pagination: 565-568Abstract
Five common Indian species which are used for plywood making were selected to study the role of extractives in the rate of development of bond strength using cold set Urea-formaldehyde resin as glue. Extraction with hot water decreased the failing load from that of control (unextracted) values while extraction with ether, alcohol/benzene improved the bonding strength. Rate of development of bond strength is only slightly effected with the type of extraction carried out and it is maximum in case of ether, alcohol/benzene extraction in most of the cases.- Effect of Resin Treatment on the Properties of Veneers at Various Stages
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Indian Forester, Vol 106, No 10 (1980), Pagination: 726-731Abstract
Nine different species of timbers both from soft and hardwoods were subjected to different stages of resin treatment and curing as is generally done in the case of plywood etc. After each stage of treatment, the physical strength properties eg. Modulus of elasticity, Modulus of regidity and Tensile strength were evaluated. The results show striking similarity in behaviour with only few exceptions. The presence of moisture and wet resin decidedly decrease the strength properties.- 'A Note on Plywood from Nepal Asna'
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Indian Forester, Vol 106, No 11 (1980), Pagination: 775-777Abstract
Nepal Asna (Terminalia alata var. nepalensis) was examined for its suitability for plywood. The note records the results of the experiments carried out.- A Short Note on Visiting Cards from Wood Veneers
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Indian Forester, Vol 105, No 10 (1979), Pagination: 761-762Abstract
Visiting cards were made at the Composite Wood Branch of the Forest Research Institute from wood veneers of three different species using three different glues. Veneers were either rotary peeled or sliced in thickness of 0.25 mm. It was noticed that for getting good grains on cards sliced veneers were better than rotary peeled veneers. Three ply construction was tried, but it was found that these cards were stiff and thick and hence this method was abandoned. Another method using two veneers with a core of glue coated kraft paper was adopted and it was found that these cards using Animal glue have shown no delamination even after six months and do not pose any printing problems. From these experiments it appears that the veneer paper laminates hold a good promise for use in visiting cards.Full Text
- Impact of Osmotic Stress on the Seed Germination and Seedling Growth of Oroxylum indicum (L.) Vent.
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Indian Forester, Vol 137, No 9 (2011), Pagination: 1109-1113Abstract
The effect of water stress induced by application of polyethylene glycol 6000 during seed germination and seedling growth of Oroxy/um indicum (l.) Vent. was analyzed in present paper. The various osmotic potentials generated (-3, -5, -7.5 and -10 bars) showed significant decrease in germination percentage. At the osmotic potential of -7.5 and -10 bars, no germination takes place. All the seedling growth parameters also showed inhibition with increase in osmotic potential.Keywords
Oroxylum indicum (L.) Vent., Water Stress, Germination Percentage, Mean Germination Time (MGT), Germination Index (GI), Germination Relative Index(GRI), Seedling Vigor Index (SVI)- Utilisation of Industrial, Agricultural and Forest Waste
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Indian Forester, Vol 94, No 1 (1968), Pagination: 118-126Abstract
Enormous quantities. of wastes (industrial, agricultural, and forests) are available in the country. Their proper utilisation is important for the balanced economy of the country. In this note utilisation of some of these has been sought in the field of plywood (adhesives, fillers and extenders, etc.) and building boards (fibre board, particle board and plastic boards). A gel obtained from paddy husk has given good results when tried as extender in U.F. glue and P.F. glue for making plywood. It appears possible that the entire wheat flour now being used in the Industry could be replaced by this gel. In the field of building boards, rubber wood has given encouraging results. Ground Nut Shell, yet another agricultural waste has yielded encouraging particle boards.- A Note on Complete Utilisation of Trees
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Indian Forester, Vol 95, No 12 (1969), Pagination: 841-848Abstract
no abstract- Tannin Rich Materials as Partial-substitutes for Phenol/Extenders in Making Phenol-Formaldehyde Resin for Plywood
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Indian Forester, Vol 97, No 3 (1971), Pagination: 145-148Abstract
no abstract- Fibreboards from Shorea robusta (Sal) Bark
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Indian Forester, Vol 97, No 7 (1971), Pagination: 422-429Abstract
no abstract- Fibre Boards from Shorea robusta (Sal) Bark-effect of Sizing Agents
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