North Eastern Hill University

About: North Eastern Hill University is a education organization based out in Shillong, Meghalaya, India. It is known for research contribution in the topics: Population & Ruthenium. The organization has 2318 authors who have published 4476 publications receiving 48894 citations.

Anticestodal efficacy of folklore medicinal plants of Naga tribes in north-east India.

Abstract: The anticestodal efficacy of nine plants that are used in the indigenous system of medicine by Naga tribes in north-east India to cure intestinal-helminth parasitic infections was tested employing Raillietina echinobothrida, a tapeworm of poultry, as a model test parasite. The study revealed that the leaves of Psidium guajava, Houttuynia cordata and stalk of Lasia spinosa possess a profound anticestodal efficacy as evident by the mean mortality time of R. echinobothrida which ranged from 1 to 3.66 hrs, following exposure to 5 - 40 mg/ml concentration of these plant extracts. Moderate activity was recorded for the leaves of Clerodendrum colebrookianum, Lasia spinosa and Centella asiatica, while Curcuma longa, Cinnamomum cassia, Gynura angulosa, Lasia spinosa (stem) and Aloe vera revealed a negligible degree of anticestodal activity.

Copper Oxide/Reduced Graphene Oxide Nanocomposite-Catalyzed Synthesis of Flavanones and Flavanones with Triazole Hybrid Molecules in One Pot: A Green and Sustainable Approach.

Abstract: An efficient, green, and sustainable synthesis of new hybrid molecules containing flavanone with triazole by merging the Michael addition and Click reaction using a copper oxide/reduced graphene oxide nanocomposite in one pot is reported. The catalyst can easily be recycled and reused in seven consecutive runs without compromising the product yields. Other notable advantages include using water as a reaction medium and obtaining good to excellent yields, low catalyst loading, high atom efficiency, high substrate variation, and good results in the gram scale reaction.

Run-off and Infiltration Losses Related to Shifting Agriculture (Jhum) in Northeastern India

Abstract: Subsequent to slash-and-burn of the forested fallow, and during shifting agriculture (Jhum) in the northeastern hill areas of India, the system loses much of its capacity to hold soil nutrients. Various losses occur through wind-blow of ash and also through runoff and percolating water. The chemistry of the ash, and the amounts of run-off and percolating water, are related to the length of the Jhum cycle owing to the type of vegetation that is slashed and burnt.The runoff and percolation losses of water and sediment during cropping, increased with shortening of the Jhum cycle. As percolation losses are fairly high due to the generally porous soil, terracing of the land in the manner suggested by some as an alternative to Jhum is not considered ecologically sound. Drastic reduction of fertility through losses of sediment and nutrients occurred in both 5- and 10-years' fallows. The shortening of the Jhum cycle to 4 – 5 years does not permit the recovery of soil fertility and has adversely affected the vegetational cover and the biogeochemical and hydrological cycles.