Are there any rules require us to must conduct (or report )the two-way ANOVA before a one-way ANOVA?

Hi Colleagues, For example. I have a data set which can be categorized based on sampling time and treatment. However, I only concern the main effect of treatment on parameters I measured. What I...

26 July 2019 946 4 View

What's the by-product of Lawesson's reagent?

I'm working up a Lawesson reaction. I tried the chromatography on silical gel, but there was always a spot at the starting point on TLC (UV 254 nm). The H-MNR and ESI-MS only showed signals of the...

08 June 2019 6,578 6 View

How can I extract leaf chloroplast?

I would like to research the poplar resistance to stress by chloroplast proteomics method. First of all, I have to extract the leaf chloroplast. Dose anyone know the method of exacting leaf...

18 May 2015 613 1 View

How can transfected DNA express unknown protein?

Hi, we recently transfected mouse ES cells by electroporation a construct containing Neo resistant gene and MT-I promoter driving expression a fusion protein with FLAG and 6X His tags. Positive...

06 September 2014 724 4 View

The challenges behind Ni-catalyzed asymmetric radical reactions

Hi, everybody, I'm reading literature concerning photoredox/nickel dual catalysis. And I found that despite various cross-coupling reactions have been developed, almost all of them were racemic....

01 January 1970 9,878 1 View

What is the velocity profile of laminar flow in a square pipe?

For circular pipes, it has been defined as u(r) = 2Vavg(1-r^2/R^2). I can't seem to find the simplified version for square channels.

01 January 1970 8,505 21 View

The best method to predict the failure of geo-materials subjected to fatigue (cyclic) loading.

The S-N curve has been proved as the classic testing method to predict the fatigue failure of many materials (such as metals and geo-materials). However, this kind of testing is extremely...

01 January 1970 7,607 2 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

Where to find data on trees in tropical agroforestry?

Hi, I'm looking for data (mainly related to management: growth rate, canopy size, soil and climate preferences, etc.) about tropical trees used in tropical agroforestry. Have you ever heard about...

28 February 2021 7,356 8 View

Analysis of CRD two factor using R studio ?

Hello everyone. I have conducted the research on post harvest longevity of tomato crop using plastic packaging and different doses of chemicals as two different factors. The design of experiment I...

28 February 2021 8,189 3 View

The Shannon's index is inversely proportional to Simpson's index (1-D)?

I'm having a problem with my bloxplot with Shannon's and Simpson's indexs. The value of Shannon for my Community 1 indicating higher diversity (in relation of the Community 2), but have lower...

26 February 2021 3,033 9 View

Your thoughts on the spherical densiometer to estimate relative species canopy cover?

Hi biologists and biogeomorphologists, I want to characterize vegetation plots on a transect that follows a successionnal gradient from a river bed to a mature forest. Ecologically, I am...

26 February 2021 5,720 2 View

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

Has anyone had luck using cell lines other than HEK 293 (such as COS1) to package lentivirus?

I am looking to package lentivirus in endothelial cells but I am opposed to using 293 cells due to personal ethics regarding the source. I have done some reading and saw that COS1, COS7, & CHO...

25 February 2021 3,030 1 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

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25 February 2021 5,713 1 View

Implementation of chance-constrained optimization problem via scenario approach?

23 February 2021 7,826 2 View