What tags are more suitable for main content extraction from HTML webpages?

I am currently working with a topic modelling based aspect-specific sentiment analysis of product reviews. The topics returned by the topic modeling tools need not be aspects. So how can I find out the aspects from this information? Do I need to find aspects manually or is there any tool or algorithms available? 

i'm trying to extract and quantify cellulase form cereal leaves using Megazyme kit CellG5.

Since I have a lot of samples, can I store the leaf samples in -80C, then take out for cellulase extraction and quantification later?

Do I need to use fresh or freeze dried or air dried or oven dried leaf?

In plant, ruche reduction reaction was carried out and the work-up was conducted.

However, the resulting inorganic solids on glass lined reactor did not wash well in water and acetone.

<Information>

1. Reaction condition: CeCl3.7H2O (cat.), NaBH4, EtOH (Solvent)

2. Work-up af. rxn: H2O quench, pH adjustment (10% H2SO4 then 30% NaOH solution)

3. To do extraction with EtOAc, EtOH was removed by concentration.

Due to the concentration, some inorganic solids were stucked on the reactor wall

and these solid were not washed wellin water, acetone and HCl solution.

antibiotic is complex compounds which need many way for extraction and we need to know more techniques for extraction and purification of it .

Some authors are using a series of new alternative of ionic liquids, named DES and Ch-DES and claimed to overcome the disadvantages of conventional extraction methods. How these solvents overcome it? What are the main advantage and problems and issues related to these components for extraction of high value chemicals/ phenolic compound etc extraction from various bioresources ?

I am working on development of protein based diagnostics for COVID-19. In this regard, I want to break open the SARS covid-19 virus and extract the native proteins. is there a kit available for the same ? like RNA extraction kit.

Thank you.

I harvested a plant and dry it under shade, but mold has been procured. Thereby, I find new constituents after extraction of essential oil and performing GC-MS analysis.

How can I interpret this phenomenon of transformation?

I need in-depth what is happened chemically?

Hello,

I am currently working on primary cell culture from zebrafish ovaries and testis, where I maintain the cells for 24 hours in different treatments and do RNA extraction. Unfortunately, the extraction yields very bad results lately. I have around 150.000 cells per sample and I have looked at my cells in flow cytometry and they are the expected populations and not dead/damaged. I used a method of centrifugation and Trizol, then switched to the Qiagen RNeasy mini kit, and now the Qiagen RNeasy micro kit. All yield the same results of <10 ng/uL.

I clean my area with ethanol and RNase Zap, work with clean gloves and pipet tips with a filter that have been treated with UV before use.

My guess is that the problem lies in the samples itself, because from whole-tissue or larvae we have a normal RNA yield.

Please let me know your thoughts and suggestions!