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

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

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

05 August 2019 1,264 5 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

What do I need to do to get you to send me the whole article named below?

by Trunnel and Holt: The Concept of Denial or Disavowal February 1974 Journal of the American Psychoanalytic Association 22(4):769-84

11 June 2018 252 3 View

What statistical analysis method should be used for analyzing the relationship between a nominal and ordinal variable?

The nominal variables are "working in a flextime schedule" and "working in a straight 8-hour schedule". The ordinal variables are scores from Likert-scales measuring Work-Family Balance and Family...

27 September 2017 1,877 11 View

If I want to do PCR of Cryptosporidium and Giardia to test, is it better to use a nested one?

05 June 2017 2,654 7 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Can I perform two way ANOVA in case of some missing groups?

I had control cells and performer ELISA analyses group (time 0). I stimulated cells with substance A and B and cultivated for 1, 2 and 3 hours. On each cells I performed ELISA. I have results...

17 February 2021 8,933 4 View

What is the relationship that determines the depth of the mechanical cultivator with the age or size of the weed For crops planted in lines?

the great depth of the cultivator may lead to passage under the roots without killing them and may give negative results to break up the soil below the roots, increasing their activity, especially...

03 February 2021 3,198 7 View

How can I remove salts from crude seaweed extract (except dialysis)?

Hi, I am interested to obtain phenolic fractions from crude seaweed extracts (using ethanol) and test for their antioxidant properties. Since most of the in-vitro antioxidant assays are...

26 January 2021 3,889 5 View

Why below-ground ecology is still unexplored (majority of it) in our country ?

Below ground ecology or below ground ecological functions and ecosystems roles are very crucial and highly significant for any ecosystem especially for the forest ecosystems. The interaction among...

02 January 2021 6,912 3 View

What is this culture medium for?

Here is the composition of a culture medium named BM medium. It doesn't contain carbon source and nitrogen source, while after cultivation something grow on that. Could anyone explain what...

31 December 2020 8,060 5 View

Do chemical and physical properties influence on the size of a polymer particle?

I would like to know if the properties of a polymer impact on the size of the particle it forms. I'm working with different polyssacharides (alginic acid from different seaweed), which are...

29 December 2020 7,333 6 View

Does anyone recycle cell culture media and if there is a person what is the procedure and WHY do they do that?

our team researching to cultivated meat, and there is some question related to cell culture media and recycling cell culture media: 1) is cell-cultured media recyclable? 2) has anyone recycled...

27 December 2020 1,467 4 View

Can you give me some Information about the generation of ROS in marine surface water?

Reactive oxygen species is a very new term i think

23 December 2020 8,416 4 View

Do you know any practical application of alginate extraction from seaweed? Can you give me an example?

Do you know any practical application of alginate extraction from seaweed? Can you give me an example?

01 December 2020 808 3 View