What are the molecular determinants for formation of adducts in electrospray mass spectrometry?

Dear all, depending on the molecular structure of an analyte different adducts during the electrospray process are formed. Even when high (up to 5 mM) of ammonium salts are present in the LC...

13 May 2020 6,621 3 View

Can I use an Aminex HPX-87H column to analyze sugars in samples with high concentrations of urea?

I have some extracts with sugars in low concentrations, so diluting isn't ideal, and there's about a 17 % of urea (from the solvent). Can the urea damage the column or affect the analysis?

12 September 2019 6,337 1 View

Presence of ZnAl2O4 by XPS?

I have a coating with 2 different layers (Al and Zn). After a process under temperature, I want to evaluate the presence of ZnAl2O4 among other oxides (mainly Al2O3 and ZnO). Is possible to...

16 June 2019 9,675 3 View

Pcr product below marker?

i have extracted bacterial genomic DNA, and after running multiplex PCR on it, i got blurry thick bands below marker. the marker used is 100 bp. i checked using nanodrop and diluted the DNA conc...

26 April 2018 8,847 7 View

Soft agar colony assay: Where should I put my treatment ?

I am performing a soft agar colony assay using 2 different cell lines. Both are able to make colonies. So now I want to test a specific drug and see if it can affect their capability for making...

15 December 2016 4,656 3 View

What affects to disappearance of a diffraction peak in XRD?

My diffraction spectrum from Mg-Al LDH with intercalated carbonate and hydroxide lost its 003(hkl). The 006 is small but visible similar to 015. Other peak intensities remained the same. Albeit...

31 March 2016 1,304 3 View

Can anyone recommend any information on edible insects and production of edible insects?

21 February 2015 858 9 View

No title

01 January 1970 543 3 View

Convention for standardized regression coefficient (beta)

Hello, I would like to ask a question. Is there a convention for interpreting a standardized regression coefficient (beta)? For example Beta =.5 is interpreted as an medium influence? Thanks...

01 January 1970 5,079 3 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

What test should i use in comparing the correlation between categorical and continuous variables?

Dear all, I have the variable (Surgery duration) represented by values in minutes and the variable (preoperative neuropraxia cases) represented as (Yes/No) values. I want to compare these two...

03 March 2021 5,427 5 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 View

How to find the mean, SD and CI in SPSS?

Hi, I hope that someone can help me with this task: I have 5 groups of participants which are numbered in SPSS from 1 to 5 (according to their group number) and are all under the variable group....

03 March 2021 506 3 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

How to code open-ended questions in SPSS?

Hello all, In SPSS I am going to code 2 open-ended questions. I have already read all the answers and I made a list of the most important categories to which I can code the answers. This question...

02 March 2021 1,757 4 View

The procedure compute?

02 March 2021 5,204 3 View

Does anyone know what a '.' means in SPSS?

Hi everyone! I was wondering if anyone would be so kind as to help me with regards to my data set on SPSS! I was checking for multivariate outliers via the standardised residuals ('Linear...

02 March 2021 7,910 3 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View