Martindale proved that under some conditions every multiplicative isomorphism between two rings is additive. In this paper, we extend this theorem to a larger class of mappings and conclude that every multiplicative $(alpha, beta)-$derivation is additive.

this work is conducted to obtain mechanical properties of microtubule. for this aim, interaction energy in alpha-beta, beta-alpha, alpha-alpha, and beta-beta dimers was calculated using the molecular dynamic simulation. force-distance diagrams for these dimers were obtained using the relation between potential energy and force. afterwards, instead of each tubulin, one sphere with 55 kda weight ...

conclusions light and temperature were both relevant factors that contributed to the growth and beta-carotene accumulation of the three d. salina strains, and nahco3 had significantly positive effects on growth. the degree of impact of the different factors on cell growth was temperature > nahco3 > light intensity > kno3 > co (nh2)2 > strains; the impact on beta-carotene accumulation was temper...

sclerotinia sclerotiorum is a phytopathogenicfungus that attacks more than 400 plant species of them medicinal plant. in this study the extract obtained from basal stalk rot of helianthus annuus l., attacked by s. sclerotiorum, was subjected to the analysis of ftir to identify the presence of beta-glucan. ft-ir spectrum showed four ranges of bands in 890 cm-1, two overlap band in 1047 and 1078 ...

in this research 20 specimen from human whole milk and whey were studied with respect to lipoproteins, cholesterol and triglycerides, 2-8 months after parturition. the whey was separated by means of ultracentri fugation. also the 24 hour diet history was recorded. the average lipoprotein components in normal human milk were, chylomicron 16.19%±11.98%, beta lipoprotein 36.71%±9.33%, pre beta-lip...

infantile haemangiomas (ih) are the most common vascular tumors occurring in early childhood, with a prevalence of approximately 5-10% of infants. these vascular tumors are divided into two main groups including infantile haemangioma and vascular malformations. although, haemangioma of infancy are common, benign and self-limited tumors, a significant percent of these lesions are associated with...

background: infectious by pseudomonas aeruginosa has spread worldwide and metallo-beta-lactamases (mbl) are being reported with increasing frequency. the aim of this study was to investigate the antibiotic susceptibility and distribution of blavim and blaimp genes in p. aeruginosa isolates from zanjan province of iran. methods: a total of 70 p. aeruginosa isolates were identified from patients ...