search for: absorb

Hello, I am trying to fit my Elisa results (absorbance readings) to a standard curve. To create the standard curve model, I performed a 4-parameter logistic fit using the 'drc' package (ExpectedConc~Absorbance). This gave me the following: > FourP A 'drc' model. Call: drm(formula = Response ~ Expected, data = SC, fct = LL.4())...

...n a Chemistry class. The problem is that although the graph functions perfectly properly, the best fit line will not work. I initially used code I pretty much copied from a website with a tutorial on this, which was: graphData.png("/code/Beer's-Law Graph.png") concentration = p1Conc absorbance = p1AbsorbanceArray graphData.assign('x', p1Conc) graphData.assign('y', p1AbsorbanceArray) fit = graphData.lm('x ~ y') graphData.plot(concentration, absorbance) graphData.abline(fit["coefficients"]["(Intercept)"], fit["coefficients"]["y...

...-- A 61)--- 62)--- 63)--- 64)--- 65)--- 66)--- 67)--- 68)--- 69)--- 70)--- A 71)--- 72)--- 73)--- 74)--- 75)--- 76)--- 77)--- 78)--- 79)--- 80)--- A 81)--- 82)--- 83)--- 84)--- 85)--- 86)--- 87)--- 88)--- 89)--- 90)--- A 91)--- 92)--- 93)--- 94)--- 95)--- 96)--- 97)--- 98)--- 99)--- 100)--- A Pool Absorb Other Digits FRL Call type Start Pattern A 1)70-- 00 -------------------- 3 BOTH --:-- A A 2)---- -- -------------------- - ----- --:-- A A 3)---- -- -------------------- - ----- --:-- A A 4)---- -- -------------------- - ----- --:-- A A 5)---- -- -------------------- - ----- --:-- A A 6)---- -- --...

Hi I have measured the UV absorbance (abs) of 10 solutions of a substance at known concentrations (conc) and have used a linear model to plot a calibration graph with confidence limits. I now want to predict the concentration of solutions with UV absorbance results given in the new.abs data.frame, however predict.lm only appears...

Hi everyone, I would like to fit a predictive model to my data in order to compare absorbance readings to a toxin standard. This data was obtained by exposing red blood cells to different toxin concentrations, which lead to the lysis of the red blood cells, increasing the absorbance (hemoglobin is freed). The data has a sigmoid shape (see below), so I thought about fitting a logistic mo...

...new here, but will try to be as specific and complete as possible. I'm trying to use “lm“ to first estimate parameter values from a set of calibration measurements, and then later to use those estimates to calculate another set of values with “predict.lm”. First I have a calibration dataset of absorbance values measured from standard solutions with known concentration of Bromide: > stds abs conc 1 -0.0021 0 2 0.1003 200 3 0.2395 500 4 0.3293 800 On this small calibration series, I perform a linear regression to find the parameter estimates of the relationship between absorba...

Hi everyone, Sorry for the newbie question but whenever I enter the following code into r it gives me an unexpected string constant in "boxplot(Abs~Conc,ylab='Absorbency',xlab'Ethanol(%)'" error. I have tried everything to eliminate it and have searched these forums to no avail, can anyone tell me what to do to allow r to generate my boxplot for me? Here is my code: A=c(0.37,0.38,1.1,1.1,0.65,0.61,0.56,0.74,0.71,0.60) B=c(0.66,0.63,0.85,0.9,0....

On 12/24/2016 5:24 PM, geo.inbox.ignored wrote: > temperature regulated fan speed can reduce noise. > > use of a baffle box with styrofoam or thin foam rubber lining. > > -----+-----+ > fan \/ | | > /\ | | > --+-----+--- > ^ ^ > baffles > > spacing between upper and lower baffles must be equal to or

HI I'm a student in chemical engineering, and i have to implement an algoritm about FIVE PARAMETERS INTERPOLATION for a calibration curve (dose, optical density) y = a + (c - a) /(1+ e[-b(x-m]) where x = ln(analyte dose + 1) y = the optical absorbance data a = the curves top asymptote b = the slope of the curve c = the curves bottom asymptote m = the curve X intercept Have you never seen this formula, because i don't fine information or lecterature about solution of this!!! Can i help me Hi Mr. Calandra

...like to run through a PLSR and have read the tutorial series, but still do not understand the data format required for the code to process my data. My current data structure consists of a .csv file read into R containing 15 columns (a charcoal dilution series going from 100% to 0%) and 1050 rows of absorbance data from 400 nm to 2500 nm at 2 nm interval. I think I need to transpose the data such that the specific wavelengths become my columns and dilutions are defined in rows, but after that point I am lost. Should I (and how do I) make my absorbance data into individual matrices that read into a d...

...value given. The peak area is much smaller than a value that would make sense. My peak area value is actually less than my apex intensity value. Is this because I am using a DAD detector rather than an MS? If so, is there a simply way to edit the peak area equation so that it will also work with absorbance values? Any help is greatly appreciated. Thanks for your time. Chris Beaver [[alternative HTML version deleted]]

I am trying to model data in which subjects are followed through time to determine if they fall, or do not fall. Some of the subjects fall once, some fall several times. Follow-up time varies from subject to subject. I know how to model time to the first fall (e.g. Cox Proportional Hazards, Kaplan-Meir analyses, etc.) but I am not sure how I can model the data if I include the data for those

Hello After (simple random cluster) resampling with replacement I ran MSM function and I'm getting the following warning message ,which I'm not sure why. I don't have any absorbing stage set up in my MSM model. I have a 4 stage uni-directional MSM model. The only thing I see might be a problem is that when the last stage (stage 4 in my data) gets repeated it seems to give me a warning message. although, it picks only one observation whereas there might be other such cases...

I am having difficulty understanding the syntax of the nlme() function for nonlinear mixed models. The data frame is called Marouane.chlorophyll. The model involves a dependent variable (Absorb) and an independent variable (Ch.surf), which are both numeric variables in the data frame. The data are hierarchically grouped as Espece, Plante nested within Espece, and Feuille nested within Plante (i.e. leaves within plants within species). Espece is defined as a factor and Plante and Feuille...

...I have updated the addressing mode matcher so that it moves a > sext that is in a way of an addressing mode (i.e., it promotes the operand > of the sext, let us call this operand def, if it is legal to do so, and > sign extends the operands of def). When the matcher does not manage to > absorb more computation after promoting def, it can revert the promotion. > > I am currently benchmarking this solution and I’ll update this thread with > the results. > Very cool. Could you share the patch? I can also run some benchmarks. -------------- next part -------------- An HTML attac...

...a cache zpool create hdd c11t0d0p3 zpool add hdd cache c8t0d0p0 - cache device I ran an OLTP bench mark to emulate a DMBS One I ran the benchmark, the pool started create the database file on the ssd cache device ??????????? can any one explain why this happening ? is not L2ARC is used to absorb the evicted data from ARC ? why it is used this way ??? -- Abdullah Al-Dahlawi George Washington University Department. Of Electrical & Computer Engineering ---- Check The Fastest 500 Super Computers Worldwide http://www.top500.org/list/2009/11/100 -------------- next part --------------...

...hat first sets up the depot application (page 68), there is this bit of code from a view: <% for product in @products %> <tr> <% for column in Product.content_columns %> <td><%=h product.send(column.name) %></td> <% end %> etc... I am trying to absorb both Ruby and rails as fast as I can. So I am searching both the Ruby API and the Rails API for methods that I don''t know. When I lookup "send" in the rails API, I don''t find anything. When I look it up in the Ruby API, it says that the form is obj.send(symbol [,args....

Hi all, I have an average 2mbit multicast stream that once in a while bursts high (up to 20mbit/s) in short periods (about 200ms). Could anyone please help me with directions using tc for configuing leaky bucket shaping to this stream? I have a 5mbit/s ceiling. My system is running gentoo linux 2.6.14, and I have compiled in all QoS modules. Thanks. Oivind

...name formulation_code strength bnf_code 100 NEONACLEX K TABS NULL 2.2.8 110 NEONACLEX TABS 5MG 2.2.1 50 MESORB DRESS 10CMX10CM 20.3.1 160 ABSORBENT CELLULOSE MESO DRESS 10CMX10CM 20.3.1 161 ABSORBENT CELLULOSE MESO DRESS 10CMX15CM 20.3.1 164 ABSORBENT CELLULOSE MESO DRESS 20CMX25CM 20.3.1 200 SEPTRIN TABS 480MG 5.1.8 210 SEPTRIN PAED SF...

...ries methods (http://statistics.open.ac.uk/sccs/). In fact only thing needed is to modify glm function to allow absorption of effect. Eg. in Poisson model individual effect is used as factor, but it is considered as nuisance term where parameter estimates are not needed. Could anyone point how absorbing individual effect could be carried out in glm. There is already code for Stata (http://statistics.open.ac.uk/sccs/stata/aglm.ado), Genstat (http://statistics.open.ac.uk/sccs/genstat%5Csccs.gen), Glim (http://statistics.open.ac.uk/sccs/glim/SCCS.MAC) , and SAS (http://statistics.open.ac.uk...