What could be the cause to have an E.coli DH10B transformed with pUC18 to grow in MKL + ampicillin but is not LAC+?

Hello everyone, I did a transformation of E. coli DH10B using pUC18 plasmid. The bacterias did grow on MKL medium with ampicillin but the colonies showed a white/pink colour and the medium was...

08 February 2021 9,720 3 View

Has anyone used a premade hybridization buffer (from Roche for example) for zebrafish in situ hybridizations?

Our in situs (alkaline phosphatase based) have stopped working. Probes are fine, but or homemade hybridization buffer seems to be the issue. Using the same supplier of deionized formaminde as...

03 February 2021 8,540 2 View

Which are the specific cells instructed to constructing the "spikes" after a shot of a mRNA vaccine?

Hello, I am not a biology researcher, but I am working in intradisciplinary research and would like to know the answer to this question, which I have not being able to understand. This questions...

06 January 2021 3,845 4 View

What are the effects of phosphorus deficiency on dehydrogenase activity in soil bacteria and fungi?

I suspect that under phosphorus deficiency the electron transport chain in the plasmamembrane and mitochondria of soil bacteria and AM fungi, respectively, is disrupted as a result of lower ATP...

30 August 2020 4,659 3 View

What business models facilitate higher engagement of health tech start ups' user base so to retain them long term?

what business models are most popular among start-ups in general? There is very little research, if you can recommend some papers, that would be great!

17 March 2020 610 3 View

Can someone please provide references for the historical use of mycorrhizal fungi in agriculture?

Hello, I am interested in finding information regarding the historical use of mycorrhizal fungi in agriculture. I am having some difficulty finding this type of material. If you would be so kind...

21 November 2019 3,431 4 View

Does anybody have any resources to understand how polymerization kinetics of random copolymers work? Specifically hydrogels if possible?

I am performing rate of reaction studies on hydrogels with 2 monomers and crosslinker. We can look at absorbance of a single wavelength of light over the course of the reaction through UV-Vis to...

29 October 2019 4,443 2 View

L cell WNT-3a-CM: why doesn't it work?

05 August 2019 1,264 5 View

What disease pathologies are you aware of that would benefit from elemental analysis?

Hello, I am currently researching a spectral computed tomography system for medical applications. The system excels in delineating the elemental composition of materials, providing a 3D...

06 March 2019 3,465 3 View

Can I use RNA protect for RNA bacterial extraction inoculated on food matrix, and after that, dilute it?

Hi people! I would like to ask whether anyone of you have extracted RNA from bacteria on a food matrix. I have to inoculate bacteria on nuts, and after my processing tests, I need to extract RNA...

11 September 2018 7,343 2 View

Does the circuit modeling for planar monopole antennas using Foster canonical forms give good approximation?

Hi researchers, I am searching for some accurate way to do the circuit modeling of planar CPW-fed monopole antennas. I have gone through the literature where mostly circuit modeling is done using...

28 February 2021 7,016 1 View

Why cannot world and community leaders be gentle? Where did ethics of care go?

The whole world is in a mess and paused. We all are tired of seeing hypermasculinized and destructive leaderships all around us. This world has seen enough of the aggressive patriarchal social...

23 February 2021 292 7 View

What is the most prevalent drug related problem in the developed countries?

Detecting the drug related problems is an important step in the pharmaceutical care plan

21 February 2021 5,421 3 View

How to perform Kaplan-meier survival analysis in SPSS?

Hi everyone, This is my first time of attempting to run survival analysis. I have a data on patients with End-stage Kidney Diseases (ESKD). I would want to run survival probability by treatment...

16 February 2021 2,647 3 View

How to inter pain intensity data using NRS when patients report their pain in spectrum?

I have been working on a pain intensity study and I wanted my patients to report their pain intensity using numerical rating scale. many patients have reported thier pain in spectrum like 2 to 3...

13 February 2021 6,598 3 View

What statistical test is required for an analysis on pre-COVID & post-COVID patient improvement after attending a 10-week programme?

Hi all, Myself and my supervisor are looking at carrying out a statistical analysis to see whether there is a difference in patient outcomes for our 10-week pain management programme according to...

10 February 2021 6,622 10 View

Can I simply dilute 25% NH3 solution to 10% solution by pouring water in tank and circulating with pump?

Is there any heat of dilution which I need to take care by putting some circulation cooler? Will there be any significant ammonia emission in the process?

09 February 2021 5,943 2 View

Patients with chronic kidney disease could get COVID-19 vaccine?

04 February 2021 278 4 View

Need a research paper for multi speaker and single microphone acoustic echo cancellation?

Hi, I am working on a problem that involves multiple smartphones/tablets. All devices are playing the same sound with synchronization difference up to +- 5ms. Now, there is an echo issue and I...

02 February 2021 5,929 3 View

I.P. drug injection- time to reach brain?

I am injecting different serotonergic drugs into mice i.p. and see an effect in the brain electrophysiology quite fast, i.e. within minutes, when using a specific receptor agonist drug. I do not...

01 February 2021 8,406 3 View