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The comaximal intersection graph CI(R) of ideals of a ring R is an undirected graph whose vertex set is the collection of all non-trivial (left) ideals of R and any two vertices I and J are adjacent if and only if I + J = R and I ∩ J 6= 0. We study the connectedness of CI(R). We also discuss independence number, clique number, domination number, chromatic number of CI(R). [ABSTRACT FROM AUTHOR]

In this paper, we relate some properties of non-comaximal graph of ideals of a commutative ring with identity with the properties of the ring. [ABSTRACT FROM AUTHOR]

Tocklai vegetative (TV) cultivars are extensively planted in the tea-growing regions of Northeast India. The present investigation explores the impact of season on the total polyphenol (TP) content and the antioxidant activity of thirty-one TV cultivars (TV1-TV31) and four other commercially popular cultivars, namely, Betjan, Kharijan, S.3A/3, and T.3E/3. The TP content of the cultivars was observed to be highest in the monsoon season, with values ranging from 230.57 to 283.53 mg g -1 . In the pre-monsoon season and autumn, the TP content ranged from 197.87 to 256.77 mg g -1 and from 169.97 to 223.50 mg g -1 , respectively. Antioxidant activity was measured through DPPH, ABTS, FRAP, and lipid peroxidation inhibition assays. The cultivars showed the highest antioxidant activity in the monsoon in tandem with TP content. A bivariate correlation indicated a highly significant ( p ≤ 0.01) positive correlation of antioxidant activity with TP content (R 2 = 0.83-0.96).