What is a method to purify extracted alpha amylase from biological material?

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How can I reduce the reaction time of amylase with 4-nitrophenol alpha d maltopentaoside to form yellow color?

I have extracted, purified and lyophilized protein of insect.I use BES, HEPES and phosphate buffer.The yellow colour product is forming but after 24hrs.The reaction is carry out at 25-28 degree...

08 September 2016 1,712 7 View

How can I prepare BES buffer for amylase assay with varying pH?

please help me to prepare BES buffer for amylase assay.i have 4-nitrophenol alpha d maltopentaoside (synthetic substrate of amylase).

11 December 2015 3,309 3 View

Is there any specific method for preparation of crystals of amylase?

I have purified amylase which was extracted from insect sample.

04 May 2014 824 3 View

Is there any specific synthetic substrate for amylase of T.castaneum?

To study enzyme activity and purification of same.

11 December 2013 5,480 5 View

Is there any specific method to study the autocatalysis of enzyme?

During storage of crude extracted enzyme I observed that the number of bands are varying during gel electrophoresis.

08 September 2013 6,161 7 View

If we will increase the percentage of ammonium persulphate for polymerization of NATIVE PAGE, is there any effect on % of gel?

I already used 10% APS but there is a problem for polymerazation so instead of 10% I used 50%APS.

05 June 2013 575 8 View

Is their any easy method to identify male and female insect of Tribolium castaneum?

I have mixed culture collected from stores.

04 May 2013 9,350 5 View

Have someone successfully used the ER alpha (Santa Cruz sc-8002) antibody in immunostaining ?

Santa Cruz now recommends this new antibody (F-10) but I can't find a publication using this reference. I'm working on human et non human primate hypothalamus and so far, it doesn't work. Is...

02 March 2021 10,003 2 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

Energy minimization in LAMMPS using NVT ?

How do I do energy minimization in lammps with NVT ensemble ? I am using the following command and it does not seem to work. It stops at extremely high energy and gives me the error zero search...

01 March 2021 2,294 3 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 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

Do you kow of any database containing data on retention time, log P and polarizability for a large number of molecules?

Hi, I am a chemistry undergraduate doing my dissertation project on HPLC. In my project, I need to predict the HPLC retention time of 20 aromatic molecules, the calibration set. To do this I will...

24 February 2021 2,602 1 View

Any easy method of analyzing vitamin D in foods by HPLC?

Looking for method of extracting and analyzing vitamin D in foods by HPLC

24 February 2021 7,524 7 View

What HPLC Marker(s) should be used to detect anthocyanins in a sample?

What HPLC Marker(s) or standard is used to detect and quantify anthocyanins such as Delphinidin, Cyanidin in a given sample of plant extract?

23 February 2021 1,832 4 View

In frequency domain alpha band(8-16hz), beta band(16-32hz), gamma band(32-64hz), sub-band(64-128hz) are same as LL,LH,HL,HH in wavelet decomposition?

I am working on single trial motor imagery data i.e. EEG data. I am following a paper which has a dataset from BCI challenge IV (dataset 2b). After removing noise and extracting all the data from...

23 February 2021 5,503 1 View