Does anyone know the pH-differential method?

I use the water method to extract the anthocyanidin from Peristrophe bivalvis (L.) Merr leave, then dilute 20 times with 0.025M potassium chloride, pH1.0 and 0.4M sodium acetate buffer, pH4.5...

20 January 2021 8,305 4 View

Should I normalise data when measuring fluorescence intensity ?

I'm measuring fluorescence intensity of the product in an enzyme reaction in 37 celsius degree. I set a kinetic measurement in 1 hour. The fluorescence intensity of the BLANK ( contains only...

03 January 2021 5,554 5 View

How to calculate the Water Stress Index for a basin?

Water Stress Index (WSI) and Environmental water requirements (EWR). Thank you.

06 December 2020 904 3 View

Has anyone tried cross-linking cells with formaldehyde before co-immunoprecipitation?

Hi, I am currently trying to co-immunoprecipitate a protein but the interaction between that protein and its binding partner is not stable. Sometimes we able to detect its binding partner but...

29 November 2020 9,261 3 View

What if the assumption of homogeneity of slope is violated in ANCOVA?

Dear everyone, I implemented a quasi experiment pre and post test design. A new teaching intervention in class. as other researchers did, I used pre test as covariance and run ANCOVA to see...

24 November 2020 6,869 5 View

What is a popular and standard model for quantifying land change drivers/determinants?

I'm looking for a standard model to quantify the land change drivers (e.g., forest to agriculture or vs). Actually, it depends on the data that I have and the specific location, but I would like...

22 November 2020 7,736 3 View

Plaxis V20 water load apply error in analyses?

Recently I have been working in some embankment project and plaxis V20 is the FEM software I am using to calculate. But by the time I am working, I figured out the water load sometimes applied to...

27 October 2020 7,835 1 View

Rotation matrix - 3D dimension to 2D dimension?

22 October 2020 9,354 4 View

TOP/FOP-FLASH assay in HEK293T cells?

Has anyone tried to study Wnt signaling in HEK293T cells? I have been trying to measure the Wnt activity using TOP/FOP-FLASH assay but the readings that I got are rather similar in both TOP and...

28 August 2020 6,052 4 View

How to combine items to corresponding components in questionnaire?

Dear senior researchers, I am a master student. I am analyzing data that I collected for my master thesis. One of my research question is What are students' attitude toward Concept map as a...

21 June 2020 5,476 3 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 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

Does any one know how i can prepare liver tissue with transmission electron microscope with good fixation?

i have problem in preparation of liver tissue with bad cell organelles and how i can adjust osmolarity

03 March 2021 8,890 1 View

I need to image mesoporous silica nanoparticles that are in ~100 nm size and do high resolution TEM to look at mesopores. what grids should I use?

Need to image mesoporous silica nanoparticles using the TEM. Also, need high resolution TEM images to see the mesoporous structure. Kindly suggest what kind of grids to use. Thanks, Shatadru

02 March 2021 1,787 2 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 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

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

Do you know any MR image dataset?

I would like to research on MR images (0.5T and 3T). Can you please suggest some websites that I can download dataset including both 0.5T and 3T MR images? Thank you.

02 March 2021 7,735 3 View

Shall I skip the measurement model in SmartPLS?

Hello everyone, I had run a mediation model in SmartPLS using questionnaires that were already validated among my statistical population. A professor who edited my paper -though she is not...

01 March 2021 3,052 3 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View