Why wont my microbial fuel cell generate any current?

I have constructed a 2 chamber MFC for my senior research assignment and it has yet to produce any voltage. I used nafion as a PEM membrane and used graphite brushes as the electrodes. I have the...

11 January 2021 5,553 4 View

Contrasting singular means?

Does anyone know of a method or approach in SPSS to contrast singular mean scores of overall samples, based only on the overall mean value, standard deviation figure and sample size? The data is...

29 September 2020 5,872 6 View

I tried to prepare a MgCl2 4M solution using anhydrous magnesium chloride (overnight) but doesn't dissolve completely in water. Any ideas?

its a very exothermic reaction so didn't use heat. As well, the colour of the solution changed to grey.

06 July 2018 1,625 3 View

How/why does commercial/popular laboratory quality control not reflect risk management?

Do you think the question of Risk Management vs Statistical Quality Control is a subject worth further examination? Best Practice from groups of scientific experts published by ISO, CLIA and...

22 May 2018 1,078 4 View

Will you send QC data and/or analyse results for a study on risk metrics and effectiveness of QC processes?

I am seeking QC data and collaborators for glucose, calcium and sodium for March, 2018. Please send data and/or join a team to evaluate the results. http://rmw.awesomenumbers.org/spring2018 We...

03 April 2018 7,222 4 View

Why does most commercial RNase A lyophilized powder have DNase activity?

14 March 2016 1,273 1 View

I have a question about a hierarchical GLMM. Can anyone help with some SPSS Genlinmixed syntax?

I'm working up to fitting a Tweedie GLMM in R (mgcv). At the moment I'm playing in SPSS to sort out the data and some ideas for random effects. The data are from a survey of coastal dolphins on a...

10 February 2016 3,747 1 View

Is there a buffer that can operate in the 3-5 pH range that does not contain organic acids?

We are using a system that has metal ions. We need to use a pH 3 or 4 buffer that does not contain organic acids, as they chelate the metals.

20 July 2015 5,277 3 View

Does anyone know where we can get our hands on some Level 1B ASTER scenes for selected areas in northern/eastern Australia at low/no cost?

Can supply the image centroids that we are chasing on request.

27 November 2013 6,662 5 View

What is the best way to score a latent factor made up from ordinal or dichotomous items?

Given that in ordinal items the gaps between scale points are not necessarily equivalent, and in dichotomous data each item does not necessarily make an equivalent contribution to the latent...

15 July 2013 6,934 18 View

Should we change media after1st 6hrs after plating HUVEC bought from INVITROGEN?it's not recomended by invitrogen.Will DMSO present in stock matter?

We have HUVEC bought from Invitrogen. Cat no -C-003-5c. while first plating the cells we have bought the protocol suggests not to centrifuge the cell with media to remove the DMSO. Should we...

02 March 2021 3,713 2 View

Can NFL theorem be valid in infinite search space in ML?

NFL theorem is valid for algorithms training in fixed training set. However, the general characteristic of algorithms in expanded or open dataset has not been proved yet. Could you show your...

01 March 2021 1,189 3 View

How to grow E.coli on the low salt LB agar plate with 50 or 100ug/ml of Blasticidin?

Hello, I would like to ask how to grow E.coli which resists 50 or 100ug/ml of Blasticidin. I have tried many methods by using low salt Luria-Bertain(LB) agar plate. However, no colonies grow. Let...

01 March 2021 2,027 2 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

Bought HUVEC from Invitrgen.need to revive it.expected it is cryofreezed in DMSO.Do I need to remove the DMSO for plating the cell for the 1st time?

After I cryofreeze the cell do I need to remove the DMSO for culturing the cell for next passages .

28 February 2021 7,738 3 View

POlymer+DMSO solution and moisture??

What could be the reason of moisture at the sides of Vial when I am preparing my polmyer+DMSO solution for membrane fabrication? What etiquettes I am possibly missing here?

28 February 2021 6,516 5 View

How can I represent SDS-PAGE results for machine learning analysis?

I am trying to classify and analyze the results of an SDS-PAGE based array for bacterial detection using machine learning, but I have trouble finding the best way to represent the results with...

27 February 2021 9,176 3 View

Is there an open source free software for text mining and sentiment analysis?

I am looking for a free software for text mining and sentiment analysis for my research on customer review mining (it involves calculating polarity of attributes,opinion oriented information...

25 February 2021 1,920 6 View

Suggest me some trending topics for phd research in text mining/AI/machine learning?

My master's research is in info retrieval and text mining. I would be grateful if you could help me to select a good topic for my phd research proposal.

24 February 2021 393 14 View

How to dilute Toxin-DMSO solution?

I have a concentrated solution of a toxin(50 micromolar) in DMSO 100%. I need to dilute it inorder to dilute both the toxin and DMSO wich can be toxic to cells. Which would you guys recommend to...

19 February 2021 7,447 2 View