1. The ability of crystalline ribonuclease to hydrolyze proteins is due to impurities present in the preparations and not to an intrinsic property of the ribonuclease molecule. The amounts of these impurities vary enormously with different preparations. 2. The dangers inherent in the use of crystalline enzymes as specific tools, without assaying them for all possible interfering impurities, are...

<p class="abstrak">Long-term use of NaNO<sub>2</sub> in food preservatives causes a variety health problems, particularly for kidney function. Natural antioxidants that can reduce the effects free radicals are required to prevent these effects. The sweet flag plant is medicinal with high antioxidant potential. This study aims determine effect rhizome extract (SFRE) on morpholo...

The Hotelling's  control chart, is the most widely used multivariate procedure for monitoring  two or more related quality characteristics, but it’s power lacks the desired performance in detecting small to moderate shifts. Recently, the variable sampling intervals (VSI) control scheme in which the length of successive sampling intervals is determined upon the preceding values has been proved t...

Fusarium oxysporum causa pérdidas en la producción de tomate, para su control se emplean fungicidas químicos que afectan el medio ambiente y causan problemas resistencia; por lo han desarrollado alternativas como los extractos vegetales. El objetivo del presente trabajo fue evaluar efectividad biológica plantas semidesierto mexicano contra F. bajo condiciones invernadero. Los tratamientos fuero...

conclusions in the case of existence gaussian noise, the results confirm that denoising is not effective on the measurement of t2* value. in the case of image distortion by rician noise, a predictor model is proposed to estimate the original t2* value. the predictor model is used to estimate the t2* value of new patients. the predicted t2* values were in good agreement with the corresponding or...

The aim of this study was to evaluate the sulphur hexafluoride (SF6) tracer technique for methane (CH4) emission measurement in sheep. Ten cryptorchid Romney sheep were involved in two indoor trials (T1 and T2), where daily CH4 emissions were individually measured both by the SF6 tracer ('tracer CH4') and by the indirect calorimetry chamber ('chamber CH4') techniques while fed on lucerne hay at...