Estimating Rotational Frequency Response Function Using Mode Expansion and Frequency Response Function Synthesis Method

The rotational frequency response function (RFRF) plays a crucial role in increasing the accuracy of the calculated results of the frequency-based substructuring method. However, RFRFs are often omitted due to the difficulties in the measurement process and limitations of the equipment. This paper presents a scheme of estimating the rotational FRF of an irregular plate structure using the FE model reduction and expansion method. The reduced FE model was introduced using the improved reduction system (IRS) and expanded to the experimental modal model (EMA model) using the system reduction and the expansion (SEREP) method. The FRF expanded method was then employed to derive the translational and rotational FRFs from the expanded EMA model. The accuracy of the expanded FRFs was evaluated with the EMA model of the irregular plate. It was found that the translational and rotational FRFs estimated from the proposed scheme were in good agreement with the EMA counterparts. Furthermore, the patterns of the estimated RFRFs were well correlated with the EMA RFRFs. This work shows that the proposed scheme may offer an attractive alternative way of accurately determining the RFRs of complex structures or structural components

Ethnoveterinary practices in Uttara Kannada district of Karnataka

253-258Traditional methods of veterinary treatments using plants are predominant in rural folk of Uttara Kannada district situated in western Ghats of Karnataka. A total of 25 formulations from 39 plant species belonging to 30 families used to treat 21 diseases of domestic animals are described. The method of preparation, dose and duration of each plant along with its botanical name, family and local names are discussed

Microviscosity of cucumber (Cucumis sativus L.) fruit protoplast membranes is altered by triacontanol and abscisic acid

AbstractCucumber (Cucumis sativus L.) fruit protoplast membranes were probed with diphenylhexatriene (DPH) and pyrene, and also with two different plant growth regulators, triacontanol (TRIA) and abscisic acid (ABA). Fluorescence anisotropies of DPH and pyrene were measured after incorporating them into the membranes. The fluorescence lifetime of membrane-bound pyrene was also measured by using neodymium-doped yttrium aluminium garnet (Nd:YAG) laser of 35 ps pulses. The microviscosities of the membranes were calculated using the values of fluorescence anisotropy and lifetime. In the presence of TRIA and ABA, there was a sharp decrease in the fluorescence lifetime of pyrene. Similarly, there was also a decrease in the microviscosities of the membranes and increase in the rate of rotation of membrane-bound fluorophore, induced by the plant growth regulators. Furthermore, TRIA or TRIA+ABA could reduce the fluorescence anisotropy of both the fluorophores whereas, ABA decreased the anisotropy of only pyrene. This property of ABA may be due to its confinement to a specific spacial facet in the membrane. Fatty acid analysis indicated that membrane microviscosity fluctuations were not due to altered fatty acid composition alone as it is known that change in lipid–protein interaction would also alter the physical status of the membrane

Laser Raman spectra of single crystals of orthorhombic potassium, rubidium, and cesium perchlorates

Laser Raman spectra were recorded for $KClO_4$, $RbClO_4$, and $CsClO_4$ for all 6 necessary orientations in the range 50-1200 $cm^{-1}$. In the 50-400 $cm^-1$ region the low frequency lines are attributed to lattice vibrations whereas the high frequency lines are librational. In the 400-1200 $cm^{-1}$ region the cation effects on $ClO_{4-}$ frequencies is insignificant. The doubly degenerate vibration \nu$^2$ does not show any splitting. The triply degenerate vibration $\nu$s shows a splitting ranging from 28 to 40$cm^{-1}$