نتایج جستجو برای: contaminations
تعداد نتایج: 1609 فیلتر نتایج به سال:
Consider two random variables contaminated by two unknown transformations. The aim of this paper is to test the equality of those transformations. Two cases are distinguished: first, the two random variables have known distributions. Second, they are unknown but observed before contaminations. We propose a nonparametric test statistic based on empirical cumulative distribution functions. Monte ...
7.1 The Structure and Role of Biomembranes 7.2 Investigation of Biological Membranes by SFM 7.3 Na,K-ATPase 7.3.1 Structure 7.3.2 Isolation 7.3.3 Crystallization 7.4 Sample Preparation for SFM 7.4.1 Binding of Membrane Fragments onto Mica Surface 7.4.2 Removal of Surface Contaminations 7.4.3 Manipulation of Surface Properties 7.4.4 Water Cell 7.5 Imaging Techniques 7.5.1 Tip-Sample Interactions...
This chapter describes common laboratory procedures that can reduce the risk of culture contaminations (sepsis), collectively referred as "aseptic technique." Two major strategies of aseptic work are described: using a Bunsen burner and a laminar flow hood. Both methods are presented in the form of general protocols applicable to a variety of laboratory tasks such as pipetting and dispensing al...
ERETIC2 (Electronic Reference To access In vivo Concentrations 2) based on PULCON (Pulse Length-based Concentration determination) methodology is a quantitative NMR (qNMR) using an external standard. The performance of the PULCON method was assessed using maleic acid (MA). Quantification of the diarrhetic shellfish toxin and okadaic acid by PULCON was successfully consistent with that obtained ...
Overgrowth of endophytes in some vitro cultures may disrupt the normal shoot tip growth and proliferation, being necessary to obtain endophytes-free achieve a plant micropropagation process. To remove these contaminations from culture medium, antibiotics are commonly added medium. However, its use production must be urgently reduced because current restrictions imposed by European Union. For th...
Dairy products is considered the most complete foodstuff that provide human with of their vital needs. The aim this study to evaluate some chemical parameters and bacteriological quality traditional white soft cheese. Our finding indicates that, pH ranged between 5.72 7.25 an average 6.53, moisture percentage 37.76 % 54.95 45.03%, fat 1.2 4.3 2.36 %, protein 16.3 23.16 19.55 %. Ash 1.7% 2.8% 2....
Abstract: The natural occurrence of fungal contamination was evaluated in stored soybeans in different agro-ecological zones. Of 30 samples examined, fungal contaminations were positive in 25.9 percent and 74.1 percent of Iranian and imported soybeans (p
We reinterpret the scanning-probe Raman spectra shown in the above paper [C.C. Neacsu et al., Phys. Rev. B 73, 193406 (2006)] and compare it to a variety of single-molecule surface-enhanced Raman (SER) studies. The observed blinking behaviour and spectral features must be attributed to carbon contaminations rather than to Malachite Green (MG) single molecules, because, under the given experimen...
Photocathodes are a limiting factor for the next generation of ultra-high brightness photoinjector driven accelerators. We studied the behavior of a superconducting Pb cathode in the cryogenic environment of a superconducting RF gun cavity related to the quantum efficiency (QE), its spatial distribution and the work function. The cathode surface contaminations can modify the performance of the ...
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