![]() Adjust the pH to determine the C value for all columns in the desired pH environment. Select a column to compare from the list below. Step #2 (optional): Select F s Weighting Factors A similarity factor, F s, will be calculated for each of the other columns in the database (below). The F s factor describes the similarity of two columns. W C 2.8 is the weighting factor for the difference in charge interactions at pH 2.8 W B is the weighting factor for the difference in hydrogen bond basicity W A is the weighting factor for the difference in hydrogen bond acidity W S * is the weighting factor for the difference in steric interactions W H is the weighting factor for the difference in hydrophobicity S * 1 - S * 2 is the difference between the steric parameters of columns 1 and 2Ī 1 - A 2 is the difference between the hydrogen bond acidity parameters of columns 1 and 2ī 1 - B 2 is the difference between the hydrogen bond basicity parameters of columns 1 and 2Ĭ 2.8 1 - C 2.8 1 is the difference between the charge interaction parameters (at pH 2.8) of columns 1 and 2 H 1 - H 2 is the difference between the hydrophobicity parameters of columns 1 and 2 It is calculated according to the following equation: A large F s factor indicates that two columns are very different.Ī small F s indicates that two columns are very similar. ![]() The weighting factors account for the fact that the selectivity of separations are more sensitive to differences in some parameters than others. Default values for the weighting factors are entered automatically below. The default values describe the relative importance of each parameter in affecting the selectivity of the separation of an "average" sample. For example, the default w H is only 12.5 while that of w C 2.8 is 83, reflecting the fact that, in an "average" sample, a difference in the C 2.8 parameter affects the selectivity of the separation much more than an equivalent difference in the H parameter. In some cases, you may want to change the relative weights. For example, if you are only interested in separating uncharged compounds, a difference in the C 2.8 parameter will have little, if any effect on the separation. It's photorealistic, the LEDs appear the way the real ones do, and the buttons almost give the same satisfying feedback of the real thing.In that case, you may wish to change w C 2.8 to zero in order to get a more relevant measure of the difference between two columns. I've bought others but keep coming back to this App. "This is the most like the real thing that I've used. It keeps getting better and better with each update." "This app is a great emulator of the classic HP-45 Scientific Calculator, in look, feel and function. The CuVée versions for Apple products are the best emulations by far. "Have been using HP RPN calculators since HP-35 first came out. Register arithmetic includes summation registers and LAST xĭouble-tap the display for some basic hints.įor more information, a manual and sample calculations visit the RPN-45 website: cuveesoft.ch/rpn45/en.Date and day of the week a number of days away (past or future) V3.11/3.12 WP 34S Owners Manual Monster Manual Special Edition A Manual of Universal Church History V3 A Manual of Universal Church History V3 9front Programmers Manual Human Anatomy & Physiology Laboratory Manual Physician Services The Survival Kit V3.Day of the week of any date between and Dec 31, 9999.Random numbers in any range, integer or real.Integer and fractional part of a number.Permutation, Combination (binomial coefficient).Normal distribution, Pearson correlation coefficient of paired variables.Solve linear equations in two or three unknowns.Exponentiation and factorial accept any values (incl.18 storage locations (9 in complex number mode).Complex numbers may be used in almost all operations.Tap display to show stack and all memory registers.Swipe left across display to correct wrong number entries.Stopwatch may be preset to current time."Secret" stopwatch implemented, extensible from 12 to 100 hours capacity.All functions and operations of the HP-45 fully implemented.It has advanced functions suitable for applications in mathematics, linear algebra, statistical analysis, computer science and others. Simulation of the HP-45's computation times (may be disabled) The HP-42S RPN Scientific is a programmable RPN Scientific hand held calculator introduced by Hewlett Packard in 1988.Animated keys with adjustable click sound and visual feedback.Printer to keep a record of calculations.Original LED display or high-contrast LCD display.Photo-realistic look based on an existing device.Powerful enhancements turn the calculator into an amazingly useful tool for the 21st century. RPN-45 SD is a complete simulation of the scientific hand-held calculator HP-45 from 1973.
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