73 research outputs found
Neomacrodione: a new degraded diterpenoid from the roots of <i>Neoboutonia macrocalyx</i> Beng (Euphorbiaceae)
No full textDesign and Simulation of Low Cost Pure Sin Wave Inverter Through Multivibrator Technique by Using Multisim
No full textPure sine wave transformers are very important nowadays when it comes to using ds power sources for both low and high-power applications. These inverters not only increase the efficiency of the power system but also prevent electrical components from damaging. Much work has been done in the field of pure sine wave inverter but for a waveform with low number of harmonics along with high efficiency is still an open challenge. There are techniques available to do this, but the need to adapt to a solution that is easy to implement as well as specifically for low energy applications. In this paper, a multi-vibration technique is used to generate a square wave which is then split into two square waves of the same frequency by the 4017-decade counter to hold the H-bridge inverter. The output of the H-bridge inverter contains harmonics that are filtered using a low pass filter. Thus, we get a pure sin wave in the output
Spirowallichiione: A Rearranged Multiflorane from Euphorbia wallichii Hook F. (Euphorbiaceae)
No full textEuphorbia wallichii of the family Euphorbiaceae yielded a new rearrangedpentacyclic triterpene of the multiflorane class which we have named spirowallichiione.The structure of this natural spirocompound was elucidated with the aid of modernspectroscopic techniques, including 2D-NMR
ChemInform Abstract: Terpenoids from Clerodendrum formicarum Guerke (Lamiaceae) of Cameroon
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Dimensions of Poverty in Kunduz Province of Afghanistan
No full textAfghanistan is a vulnerable country, and various challenges have led to widespread poverty. This study measured the different dimensions of poverty in rural and urban areas to help policymakers with poverty alleviation in the Kunduz province of Afghanistan. The data were collected from 360 rural and urban households. According to the findings, the MPI index in the Kunduz province’s rural and urban areas was found to be 0.483 and 0.445, respectively. The results indicate that Kunduz faces both rural and urban poverty, but that rural poverty is more severe than urban poverty. The intensity and headcount ratio of poverty in rural areas is more significant than in urban areas. It also is clear that all dimensions of poverty in Kunduz are very serious. Thus, it is necessary to establish a comprehensive program to reduce all aspects of poverty
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