What colour is a resorufin solution at pH < 6.1?

The redox dye resazurin (dark blue) can be reduced in aqueous solution at pH > 6.1 via resorufin (pink) to dihydroresorufin (colourless). What colour is the resorufin solution at pH < 6.1?

21 January 2021 8,442 2 View

We use Thermo Scientific Superfrost plus gold coated slides. Why our cryo sections of dry fruits do not stick to the slides?

We use Thermo Scientific Superfrost plus gold coated slides. Why our cryo sections of dry fruits do not stick to the slides?

13 January 2020 1,215 1 View

My mysterious red dye may not be neutralized before HPLC/MS as it is only stable between pH 12.5-12.9. Who could help with equipment tolerating pH13?

More information in https://www.chemistryviews.org/details/education/10821368/150_Years_Alfred_Wohlk.html

04 July 2019 1,409 1 View

Are smaller insect species more sensitive to residual insectides?

Alarming declines of insects elicited a vivid public debate, particularly in Germany (#Insektensterben), but also in many other countries (see...

06 September 2017 7,975 4 View

Someone knows a company that offers gene synthesis in expression plasmids for use in plants?

16 May 2016 8,212 3 View

Which flower signals are honest?

There are some reports about honest floral signals, e.g. flower colour change in many flowering plants correleted to nectar production, size of Dalechampia bracts indicating the size of a resin...

25 April 2016 1,418 5 View

Which pan trap colors are attractive for bees?

Dear All, I want to learn about pan trapping of bees and the most attractive colours. Does anybody know published spectral reflectance curves of pan trap colors? Can anybody explain the term...

08 March 2016 7,710 44 View

How does flower suntracking correspond to bee foraging behaviour?

Many flowers show heliotropism and the flowers are sun tracking. The discussed benefits of sun tracking flowers are heating up the flowers for better pollen germination and seed production, and...

26 January 2016 9,316 5 View

Does it make sense to compare linear regression slopes in the Murmansk region (Russia) using air temperatures from gridded E-OBS data?

12 June 2015 8,483 14 View

Why do some researchers neglect multiplicity in the calculation of statistical significance?

14 February 2014 786 3 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Why does blocking with my immunogenic peptide cause nuclear fluorescence in ICC?

Hi all, I am validating a polyclonal antibody raised against human ANT4, through WB and ICC. In most of my controls, the antibody shows very little off-target binding, but when I pre-incubate the...

03 March 2021 5,999 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Is there any test to determine the cardiovascular risk of patients with obesity? from the perspective of obesity?

We found tests to determine cardiovascular risk taking into account lipid profile, blood pressure, age, history of diabetes, other laboratories. But when weight is involved, there is a paradox. I...

02 March 2021 6,036 1 View

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02 March 2021 3,060 3 View