students appreciation of techniques used by teacher

... 18 Table 3.1 Teachers’ and students ranking of topics…………… …………………… … 20 Table 3.2 Teachers’ and students ranking of sub-topics …………………… ………… 21 Table 3.3 Students ranking of topics and sub-topics ... list of abbreviations ACTFL American Council on the Teaching of Foreign Languages TESOL Teachers of English to Speakers of Other Languages MOET Ministry of Education and Training NTTC Nghe An Teachers' ... …………………………… ……… 23 Table 3.4 Teachers’ and Students ranking of tasks …………………… ……………… 24 Table 3.5 Students ranking of tasks …………………………………………………… 25 Table 3.6 Students ranking of constraints in studying...

Ngày tải lên: 28/03/2015, 09:17

... "rule of thumb" for detecting the presence of round off error is the appearance of a large number of zeros at the righthand side of the answers Should the number of zeros depend on parameters of ... determinant of the product of two matrices is the product of the determinants of the two matrices One of the important aspects of the determinant is that it is a single parameter that can be used to ... ago now sit on the desks of individuals Methods of analysis that were only dreamed of three decades ago are now used by students to homework exercises Entirely new methods of analysis have appeared...

Ngày tải lên: 20/12/2013, 19:15

... a set, we suppose the existence of a designated universe of possible objects In this book, we will often denote the universe by S By a set, we mean a collection of objects with the property that ... Quite often, a set A is defined to be those elements of another set B that satisfy a specified mathematical property In such cases, we often specify A by writing a generic element of B to the left of ... occurrence of B is not affected by the occurrence of A This can be expressed by writing P (B|A) = P (B) (2.8) Substituting the definition of conditional probability into (2.7) and multiplying by P (B)...

Ngày tải lên: 16/01/2014, 16:33

... 0.5 of a second) • The nearest 1/10th of a second: 2.36 seconds with true limits of 2.41 and 2.31 seconds (i.e., ± 0.05 of a second) • The nearest 1/100th of a second: 2.364 with true limits of ... be used in introductory statistics courses By utilizing a familiar program such as Excel, students can concentrate more on statistical concepts and outcomes and less on the mechanics of software ... statistics students can sometimes feel overwhelmed by the trappings of statistical analysis-the formulas, the math, the tables and graphs-so that they lose sight of what statistics are supposed to offer...

Ngày tải lên: 29/03/2014, 04:21

... engaged in rendering professional services If professional advice or other expert assistance is required, the services of a competent professional should be sought Portions of information contained ... start of the project to measure the gaps and then again at the end of the project to demonstrate the improvement Correlation and Regression These two terms are often confused In the world of Minitab ... copies of the graph 11 Cycle between the two graphs a couple of times by double clicking on the top and bottom text Notice that there is a difference in the type of cross in the top left corner of...

Ngày tải lên: 05/05/2014, 16:46

... motivated by a wide range of scientific problems 2 Filtering 2.1 Introduction Data in the physical sciences are characterized by the all-pervasive presence of noise, and often knowledge is available of ... and scale are of key importance, and so also is region of interest In multiwavelength astronomy, the fusion of information and data is aimed at, and this can be helped by the use of resolution ... effects of atmospheric blurring, or quality of seeing, certainly is of importance There will be a wide-ranging 1.2 Transformation and Data Representation – – – – – – discussion of the state of the...

Ngày tải lên: 05/06/2014, 11:59

... the number of subsets of a set of n objects We just add the number of subsets of size (with the usual convention that 0! = 1) and the number of subsets of size and the number of subsets of size ... SUN were used in working the examples in the text and are used by my students on most problems involving real data My students and I have used both S and Minitab; other packages could be used as ... normality) A variety of descriptive methods are introduced in Chapter 10 Many of these techniques are used in later chapters The importance of graphical procedures is stressed, and notions of robustness...

Ngày tải lên: 12/06/2014, 16:26

... outcome of these studies was an improvement in the previously described MSCC [15] and HELP-seq [10] assays, not only by means of technical modifications such as the use of EcoP15I but also because of ... assessed by flow cytometry with SSEA4, CD24 and Oct4 markers To extract DNA, the cells were suspended in 10 ml of a solution of 10 mM Tris-HCl (pH 8.0), 0.1 M EDTA and ml of 10% SDS to which 10 μl of ... (25 μl of 2× Quick ligase buffer, μg of HpaII-digested DNA or μg of MspI-digested DNA, 0.1 μl of Adapter AE (1 μM), μl of Quick Ligase in a final volume of 50 μl) After AE ligation, the products...

Ngày tải lên: 09/08/2014, 20:21

... of a chromophoric by- product The formation of the by- product is stoichiometric with reactive cysteines Thus, one can quantify the number of cysteines that reacted from the absorbance of the by- product ... polyanion binding Interactions of this type are important in binding of cofactors, reactants, and inhibitors to enzymes Examples of anionic reactants and cofactors utilized by enzymes include phosphate ... phase of the reaction one can define the velocity, d[P]/dt : 9d[S]/dt, as the slope of a linear fit of [P] or [S] as a function of time As a rule of thumb, this initial quasi-linear phase of the...

Ngày tải lên: 13/08/2014, 07:20

... mechanistic studies of the enzyme 70 STRUCTURAL COMPONENTS OF ENZYMES Figure 3.19 Examples of some common cofactors found in enzymes Cofactors fulfill a broad range of reactions in enzymes One of the more ... unit of hemoglobin is a heterotetramer, composed of two subunits and two subunits Each of these four subunits contains a heme cofactor (see Section 3.7) that is capable of binding a molecule of ... Structures of the flavin cofactor in its various oxidation states 72 STRUCTURAL COMPONENTS OF ENZYMES Figure 3.21 Covalent adduct formation by flavin cofactors in enzymes (A) Oxidation of dithiols...

Ngày tải lên: 13/08/2014, 07:20

... initiation of the reaction there will be a rapid burst of formation of the ES complex followed by a kinetic phase in which the rate of formation of new ES complex is balanced by the rate of its decomposition ... on the rate of formation of the complex (governed by k ) and the rate of loss of the complex (governed by k and k ) The rate  \  equations for these two processes are thus given by: d[ES] 9d[ES] ... knows the concentration of enzyme used experimentally, the value of k can be directly calculated by  dividing the experimentally determined value of V by [E] The value of k   is sometimes referred...

Ngày tải lên: 13/08/2014, 07:20

... nucleophilicity, of a group is determined by a number of factors; one of the most important of these factors is the basicity of the group Basicity is a measure of the tendency of a species to ... of the power of these methods for determining individual rate constants and of the value of such information for the development of detailed mechanistic models of catalytic turnover Because of ... rate of reaction is determined by the rate of encounters between the two substrates The rate of collisional encounters can be marginally increased in solution by elevating the temperature, or by...

Ngày tải lên: 13/08/2014, 07:20

... of product or utilization of substrate Methods for stopping enzymatic reactions usually involve denaturation of the enzyme by some means, or rapid freezing of the reaction solution Examples of ... reaction is initiated by the addition of a small volume of enzyme stock solution For this illustration, let us say that the reaction mixture is prepared by addition of the volumes of stock solutions ... reaction time course of the reaction 7.2 DETECTION METHODS A wide variety of physicochemical methods have been used to follow the course of enzymatic reactions Some of the more common techniques are...

Ngày tải lên: 13/08/2014, 07:20

... relative amounts of both substrate and products can be quantified by ascertaining the degree of staining of these bands As illustrated by Figure 7.18, it is fairly easy to perform this type of relative ... as a result of any intrinsic property of our enzyme system, but rather because of a failure to measure the true initial velocity of the reaction under conditions of high [E] Plots of velocity ... If one is aware of a cofactor requirement for the enzyme under study, these effects can often be avoided by supplementing the reaction mixture with an excess of the required cofactor For example,...

Ngày tải lên: 13/08/2014, 07:20

... (8.9) Thus, the value of is indeed the same for the modification of K by inhibitor and the modification of K by substrate The values of and provide information on the degree of modification that one ... double-reciprocal plot The slopes of the lines, which are given by K /V  , vary among the lines because of the effect imposed on K by the  inhibitor The degree of perturbation of K will vary with the ... function of [I], and the value of K is determined from  the x intercept of the line (B) The value of 9K is determined from the x intercept of a plot of the slope of the lines from the double-reciprocal...

Ngày tải lên: 13/08/2014, 07:20

... cartoon of the binding of flurbiprofen to the active site of PGHS through salt bridge formation with Arg 120 (bottom) is based on the crystal structure of the PGHS1— flurbiprofen complex reported by ... determined by reversed phase HPLC and by measuring the ability of the redissolved filtrate to effect inhibition of fresh samples of the enzyme (Copeland et al., 1994, 1995) Upon finding that 97% of the ... binding cavity The formation of this salt bridge, by displacement of nearby amino acid residues, may be the rate-limiting step in the time-dependent inactivation of the enzyme by these inhibitors Figure...

Ngày tải lên: 13/08/2014, 07:20

... slopes of the lines as a function of 1/[B], and the y intercepts (i.e., 1/V  ) as a function of 1/[B] (Figure 11.2)  The y intercept of the plot of slope versus 1/[B] yields an estimate of K6/V ... EXAMPLES OF COOPERATIVITY AND ALLOSTERY IN PROTEINS 369 composed of six ligand coordination sites In the heme groups of hemoglobin, four of these coordination sites are occupied by nitrogens of the ... DNA The activity of the Trp repressor is an example of a negative feedback loop, in which the synthesis of an essential molecule of the cell is controlled by the concentration of that molecule...

Ngày tải lên: 13/08/2014, 07:20

... 100% of the students report their teachers explain the rules of new English grammar structures in English.75% of the students reveal that they are rarely given examples of new structures, 25% of ... 90% of the students answer “no”, only 10% of the students find doing grammar practice orally difficult 10% of them think it makes the class noisy, 7.5% of the students feel embarrassed, 5% of ... caused by Haiphong environment and the former objectives of teaching The common practice of some senior teachers is just giving the explanation of new words and grammar structures, asking students...

Ngày tải lên: 12/04/2013, 16:19

... average or mean of a set of numbers, add all of the numbers together and divide by the quantity of numbers in the set Average = Lisa made twice as many cookies as Rebecca Unknown = number of cookies ... some green candies has a total of 60 candies in it The ratio of the number of green to red candies is 7:8 How many of each color are there in the bag? The sum of a number x and four is at least ... of books that Becky has Unknown = the number of books Becky has = x Known = the number of books Cordelia has = 3x + Times the sum means to multiply a number by a quantity Five times the sum of...

Ngày tải lên: 02/11/2013, 17:20