Measurement soil pH in situ?

More Christian Yamir Cordero-Vázquez's questions See All

RTD Step analysis with matlab?

Hello to all my dear colleagues. I need to get my E(T) curve for my reactor. I already have the measures but I ignore how to procede with the data analysis. I have got Matlab but i am not sure if...

21 June 2020 2,675 5 View

Help about chemical sludge characterization?

Hello. I did run some coagulation / flocculation experiments[FS1] and I have been requested to characterize the sludge. I am ignorant on how to so. I was only requested to do SEM, XRD and Zata...

16 June 2020 8,715 7 View

In solar heterogeneous photocatalysis, is solar geometry relevant?

My project is supposed to considered solar irradiation as an important variable for heterogeneous photocatalysis. I haven't found any study that considers solar geometry as a variable of study in...

30 January 2020 744 3 View

Why do I have a Jagged line on my qPCR amplification?

I am performing a qPCR standardization of some MGB probes. I have tried just a few times but I don't want to waste reagents, every time I tried the assay, there is a jagging line. I am thinking...

13 November 2019 4,554 3 View

Do you have information about monoglycerides determination by Normal phase HPLC using a ELS detector?

We determine monoglycerides by normal phase HPLC using a ELS detector obtaining reliable results. Now we have a new equipment (SHIMADZU UFLC) with the same type of detector. However, when...

09 October 2019 1,244 3 View

Can a probe work with less Tm than the primers?

I found 2 interesting articles for the detection of bacteria at Phylum level with MGB probes, claiming that they work. I want to use that primers however when I use the oligoanalyzer tool, it...

08 July 2019 6,409 3 View

Which are the best methods to dye plastic microfibers in a sample?

We are trying to identify microfibers in water samples

28 April 2019 2,162 3 View

Protocol for polymer stainning with Ruthenium tetroxiode?

I cannot find a comprehensive protocol for stainning polymers with Ruthenium tetroxide solution. I would like to know the instructions and safety precautions for stainning and handling of...

04 November 2018 7,875 2 View

Does anyone has a protocol for measuring dopamine using and ELISA? . Does ELISA id DA levels or only TH or DAT?

Hi All, I'm completely new in the dopamine world and ELISA. I collected fresh brain samples and I have them in -80C. Do you have any protocol for ELISA brain sample preparation? I know the kits...

12 August 2018 1,811 3 View

I am trying to make siRNA transfection with Lipofectamine 2000. Can you give me some advice on how the most effective way to do this?

I am trying to perform an siRNA transfection with Lipofectamine 2000 into a 96 well plate, but I have some trouble preparing the reactives. I want a final concentration 50 nM of siRNA, but I found...

24 April 2018 2,734 2 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

Does anyone know HRM channel in a 2 plex QIAGEN Rotor- Gene Q qPCR can be used as a separate channel?

I am going to have 3 different probes in my qPCR work that I am going to do. But I realized that the machine we have in the lab is a Rotor-Gene Q 2plex HRM Platform, saying it has green, yellow,...

01 March 2021 8,544 1 View

Samples to study circular dichroism (chirality)?

I want to build a low-cost polarimeter to study circular dichroism (chirality). What type of samples can I use? I am looking for samples that can be found outside the laboratory.

01 March 2021 9,101 3 View

How to accurately quantify chitin?

Hi all, I have been working on the quantification of chitin in insect samples and feed for a while but I can notice that the quantification methods (e.g. exposure to HCl, NaOH, and weighing sample...

01 March 2021 1,843 2 View

How to define tie constraint between rigid body and another part in dynamic explicit model of Abaqus?

Hi dear researchers I connected a rigid body into the part of my structure by tie constraint and then I added displacement to rigid body, in static general step every thing is fine and these two...

28 February 2021 3,442 2 View

Which database would give me this list of chemical components?

Dear colleagues: I would like to know if anyone knows of a database that gives me the parameters pH, K, K, Mg, P, C, N, Zn, Cu, Ni and Cd of common foods. I find a lot of information of proteins,...

26 February 2021 5,525 3 View

Can anyone help with Schistosoma identification?

Can anyone identify what kind of Schistosome species this might be? Morphological features of cercariae and adults resemble Trichobilharzia, though I am fairly new to the field of parasitology...

25 February 2021 7,760 6 View

Why is NH4OH added in heavy metals limit test?

The limit test I'm referring to is USP method II. In this procedure you need to dropwise add 6N of NH4OH to the sample until it the pH is alkali. After that you need to dilute and add HOAc until...

23 February 2021 2,049 3 View