Phytochemical and some pharmacological properties of certain plants belonging to Asteraceae family

The aerial parts of three plants belonging to Family Asteraceae: Inula crithmoides, Iphiona scarab and Jasonia montana were investigated. Phytochemicals isolated from Inula crithmoides were identified as: isopimpinellin [I], scoparone [II], psoralene [III], kaempferol-3-O-alpha-L-rhamnopyranoside [IV], kaempferol -3, 7- di-O-alpha-L-rhamnopyranoside [V], kaempferol-3-O-beta- D-glucopyranoside-7-O-alpha-L-rhamnopyranoside [VI] and isorhamnetin-3-O-beta-D-glucopyranoside-7-O-alpha-L-rhamnopyranoside [VII]. From Iphiona scarba umbelliferone [VIII], xanthotoxol [IX], marmesin [X], alpha-amyrin [XI], stigmasterol [XII] and beta-sitosterol [XIII] were isolated. Moreover, Jasonia montana was found to contain 7-hydroxy-3, 5, 6, 3',. 4'-pentamethoxy flavone [XIV], 5, 7-dihydroxy- 3, 6, 3', 4' -tetramethoxy flavone [XV] and 5, 7-dihydroxy-3, 3', 4' -trimethoxy flavone [XVI], in addition to ferulic acid, caffeic acid, chrorogenic acid, alpha-amyrin, stigmasterol and beta-sitosterol. Inula crithmoides aqueous methanolic extract showed significant inhibitory effect on mouse lymphoma [Cell line L1210] in vitro study in concentration dependant manner starting from 12.5 up to 250 microg/ml [20 - 100% inhibition], respectively. In vivo study, the results indicated that Inula crithmoides methanolic extract had significant antioxidant effect against mycotoxin [Ochratoxin A]-induced oxidative stress in rat. Iphiona scabra and Jasonia montana ethanolic extracts showed potent acute anti-inflammatory, anticoagulant and hypotenssive activities comparing to the standard drugs [indomethacine]

Evaluation of thermal hazard of azobisisobuty ronitrile using acicular assign rate calorimetry

The thermal decomposition of Azobisisobutyronitrile [AIBN] has been studied under fully adiabatic conditions in a sealed bomb using an accelerating rate calorimetry technique [ARC]. Data relating temperature, pressure and time has been generated. AIBN decomposes exthothermally and the onset of the decomposition occurs at 56.19°C. The reaction reaches its maximum at 112.28°C. During this temperature range, the self-heat rate, and the time to maximum rate of the reaction were evaluated. The experimental data has been also treated to evaluate the activation energy of the potential runaway reaction

Spontaneous ignition behaviour of cotton fabric having different amounts of polyester

Measurements were made on a series of cottonpolyester blends having different compositions. The results showed that the time to ignition increases as the polyester contents of the fabric were increased and explanation of this observation is given. Both the orientation of the fabric and the tewperature of the furnace environment have affected the time to ignition values. The time to ignition was found to be longer for the fabric loaded in horizontal position than that loaded vertical position. This difference was attributed to the effect of the forced convection induced inside the furnace