نتایج جستجو برای: preparation methods
تعداد نتایج: 2016548 فیلتر نتایج به سال:
in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...
introduction: the purpose of this in vitro study was to compare working length (wl) changes after straight-line access (sla) and different coronal flaring (cf) methods. materials and methods: coronal access preparations were made (without sla) in molar teeth to allow access to 120 canal orifices with a hand file. the suitable cusp and root tips were then flattened to facilitate reproducible and...
The centrosome of higher eukaryotic cells is the main microtubule-organising centre. To understand the molecular mechanisms underlying this organelle’s biogenesis and important functions in several cellular processes, such as microtubule nucleation, cell division and stress response, it was critical to develop methods for isolating biochemically meaningful quantities of centrosomes. Centrosomes...
Nano-Hydroxyapatite (nHAP) is a very valuable mineral that is widely used in tissueengineering as well as bone and dental repair. Moreover, it is a major component of bone, enamel and dentin that can interact effectively with healing tissues due to its high biocompatibility. It is important to note that the purpose of its medical application can be identified based on the structure and sy...
the current study aimed at investigating the relationship between motivation and test preparation strategies (tpss) used by iranian pre-university students in their preparation period for the university entrance exam (uee). due to the importance of uee in iran, this study also attempted to show its impact on these two important variables. to this end, 100 pre-university students in an iranian p...
abstract recent studies suggest that prelistening activities play an important role in the development of listening comprehension (e.g. long 1990;chiang and dunkel 1992; schmidt-rinehart 1994; jensen and hansen 1995; robinson et al., 1995; buck, 1995; foster and skehan,1996; teng 1996; robinson, 2001; chang and read 2006). in line with previous studies and to shed light on a new aspect of sche...
– Deburring is the finishing technique that is very essential for the manufacturing of precise components. Deburring process with greater efficiency and full automation is an extremely difficult task. Thermal deburring offers a potential solution to such problems. For successful utilization of thermal deburring, more intensive research including parameters analysis of the process is still requi...
A general approach to the construction of discrete equilibrium distributions is presented. Such distribution functions can be used to set up Kinetic Schemes as well as Lattice Boltzmann methods. The general principles are also applied to the construction of Chapman Enskog distributions which are used in Kinetic Schemes for compressible Navier Stokes equations.
Guttmacher Institute/IUSSP fertility, then a regression equation to predict TARs can be set up with easily obtainable data. The simplified equation seems to fit developed countries better than developing countries, because additional factors (such as traditional method use, unmet need for contraception, education, urban-rural residence, sexual activity and contraceptive use among unmarried wome...
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