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تعداد نتایج: 133213 فیلتر نتایج به سال:
Although Salmonella enterica serovar Typhimurium can undergo phase variation to alternately express two different types of flagellin subunit proteins, FljB or FliC, no biological function for this phenomenon has been described. In this investigation, we constructed phase-locked derivatives of S. enterica serovar Typhimurium that expressed only FljB (termed locked-ON) or FliC (termed locked-OFF)...
In this paper we empirically try to estimate productivity and growth of the world's economies by selected indicators measuring sustainability, equity, and the state of democratic rights and civil liberties. We use models from the Data Envelopment Analysis (DEA) literature to compare productivity levels in a multiple output setting. This productivity level can then be interpreted as a new human ...
The tracking performance of non-linear amplifier based conventional second order phase locked loop (PLL) and charge pump phase locked loop have been examined numerically by solving the system equations in the presence of lognormal type of fading signal. Some analytical results for non-linear amplifier based conventional phase locked loop and charge pump phase locked loop are also incorporated t...
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