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L. K. Rajkhowa ¹, A. Hazarika ¹, C. Siam ², R. K. Dubey ³, G. D. Baruah ³

Affiliations
1 C M J University, Modrina Mansion, Laitumkhra, Shillong-793003, Meghalaya, IN
2 Department of Physics, Digboi College, Digboi-786171, IN
3 Centre for Laser of Optical Science, New Uchamati, Doom Dooma-786151, IN

Abstract

The semi classical theory of laser as developed by Willis Lamb and coworkers several decades ago explains a large number of laser phenomena particularly in gaseous phase. In this theory it has been shown that, whenever we plot normalized population difference versus axial coordinates, there appears dips or holes at regular intervals at particular positions along the laser axis. These holes represent the depletion of population inversion thereby meaning the reduction of laser beam intensity. These holes are known as spatial holes. These holes are always present in laser originating from a Fabry-Perot cavity and are not welcome in the operation of high power laser. In the present work, we analyzed the phenomenon of spatial hole burning in the light of some non-physics context.

Keywords

Spatial Hole Burning, Laser Beam Intensity, Fabry-perot Cavity, Non-physics Context

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A. Hazarika ¹, H. N. Sarma ²

Affiliations
1 Department of Zoology, Chaiduar College, Gohpur, Sonitpur 784 168, Assam, IN
2 Department of Zoology, Rajiv Gandhi University, Rono Hills, Itanagar, 791112, IN

Abstract

Polygonum hydropiper is a wild plant found in Assam, a North-Eastern province of India. Tradition prevails among the folk women of Assam to use the ischolar_main of this herb for fertility control. In the present investigation crude methanolic extract of ischolar_main of this plant was tested for anti-fertility property in female albino rat. Adult cycling female rats were administered through oral route the crude ischolar_main extract at a dose of 1 g/kg body weight/day for 12 days. Subsequently, the rats were allowed for recovery until day 63. The estrous cycle was monitored routinely through analysis of the vaginal smear. On termination of treatment the rats were allowed to mate with males and to complete the full term of gestation. The number of newborn pups was considered as the number of implantations. The estrous cycle of the extract treated rats became irregular, resulting in failure of gestation. The estrous cycle was restored following the recovery period. However, the number of newborn pups was significantly lesser than in the controls. The results reveal that the ischolar_main of Polygonum hydropiper contains steroidal/estrogenic compound(s) which can affect the female reproduction in rat.

Keywords

Polygonum hydropiper, Endocrine Disruption, Reversible Infertility.

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M. K. Yadav ¹, N. L. Patel ², A. Hazarika ²

Affiliations
1 Department of Horticulture, N.M. College of Agriculture, Navsari Agricultural University, Navsari (Gujarat), IN
2 ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari (Gujarat), IN

Abstract

An experiment was carried out the study of effect of micronutrient on leaf nutrition of banana cv. Grand Nain at Regional Horticultural Research Station, Navsari Agricultural University Navsari (Gujarat) during the year 2005. The experiment was laid out in a Randomized Block Design with nine treatment combinations involving two levels of chelated and non chelated (iron 25 and 50 gm and zinc 20 and 40 gm per plant) micro elements with common application of MnSO₄, CuSO₄ and borax (20, 5 and 10 gm per plant, respectively) expect control. The higher nitrogen and iron content in leaves were recorded under the plants treated with higher levels of FeEDTA with common application of micro-elements. However, the higher percentage of phosphorus, zinc, manganese and copper content in leaves were recorded in the treatments of higher ZnEDTA with common application of MnSO₄, CuSO₄ and Borax.

Keywords

Banana, Chelated, Micronutrients, EDTA, Nutrition, Grand Nain.

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