(Silica , silicates , oxides , carbonates , sulfates , metals) What are the most effective acids to dissolve each compound?

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Seasonality Adjustment of a Dataset with Missing Values?

Hello, I am working on tourism data (tourism income and tourism arrivals) and the seasonality is very high as expected. I would like to apply Census X-13 method for the seasonality adjustment;...

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Can I Request the Names of the Referees?

I prepared a 23-page article on parameterization. I submitted the article to a journal known as "good" in its field. After keeping my article for 4 months, the journal suggested a revision....

28 June 2023 7,386 6 View

How Can I estimate the optimal portfolio weights and the hedge ratios from the output of BEKK Garch model in Eviews ?

How Can I estimate the optimal portfolio weights and the hedge ratios from the output of BEKK Garch model in Eviews ? Any help is greatly appreciated.

29 January 2023 5,918 1 View

What is a suitable mobile phase in HPLC ion exchange chromatography for measuring acetate ions?

Hello, I am a student investigating acetate ions in wood. My current mobile phase is 1000:0.5 (H2O;H2SO4) and I do not have the most resolute peak for acetate. The column is a H+ Column packed...

31 October 2022 7,691 5 View

What is the name of this integral function and what is the solution of it?

P(y)=Integral( P(x|y)*P(y)*dx) function is above if I didnt write wrongly. P(x|y) is conditional probability and it is known but P(y) is not known, thanks. there may be an iterative solution but...

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How to separate an unknown component that causes tailing with HPLC?

Hello, In the chromatogram you can see that the second peak (retention at 4 min), which is an acetate peak, has huge tailing which is known for the sample that is measured but I need to know how...

09 October 2022 230 20 View

Is bipolar disorder focal ?

Hi, I am not a physician but curious about the bipolar activity in the brain whether a focal turbulent activity and having a fixed place in the cortex or a wandering turbulent activity in the...

01 September 2021 2,923 5 View

How do one prepare Disulfiram in olive oil solutions?

I have read several articles mentioning the preparation of the drug disulfiram (DSF) in olive oil for oral gavage of rodents. However, in those papers, there is no description of how this is...

06 January 2021 4,082 1 View

Which procedure should I perform in an azo coupling reaction where histidine and tyrosine are used as the coupling agent?

I used L-Histidine and L-Tyrosine as coupling agent for azo coupling reaction and sodium hydroxide solution to adjust pH. Although color change was observed during the coupling, no precipitate...

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Clearer interpretation of error correction term?

Dear scholars, My error correction term coefficient is negative (-0.69) and statistically significant. This means that 0.69 of the long-term imbalances are removed in one year. It is OK. I want to...

27 January 2020 4,829 3 View

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

Determining the worth of a point improvement in Hamilton Depression Scale?

Dear readers, Thanks for your attention. I am wondering about the health economic problem of quantifying the value of interventions which a) prevent, b) improve symptom profile and c) ultimately...

05 August 2024 3,246 1 View

Conjugation of PEG-Amine to an Amino Acid Using EDC?

I am attempting to conjugate PEG to an amino acid at the C-terminus, for the purposes of producing nanoparticles. I have been told that PEG modified with amine groups can be used for this purpose,...

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Is it possible to use a safer acid instead of monochloroacetic acid to convert bacterial cellulose to carboxymethyl cellulose?

Hi, researchers, Is it possible to use a safer acid instead of monochloroacetic acid to convert bacterial cellulose to carboxymethyl cellulose?

29 July 2024 4,570 0 View

My cfDNA extraction protocol using silica beads works with plasma collected in COD SAGM bags but not with plasma collected in K2 EDTA tubes. Why so?

I am currently performing cell-free DNA (cfDNA) extraction from plasma using an in-house developed kit that employs silica-coated magnetic beads. My protocol works effectively with plasma obtained...

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What is the Principle of Cysteine-carbazole-sulfuric acid reaction with glucose?

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Can sulfuric acid be used to prepare anthrone reagent when it has oxidized and changed color in reaction to light?

Sulfuric acid has changed color to yellow.

16 July 2024 6,964 0 View

Issues with Malaria Coated Nitrocellulose Membrane Releasing Moisture?

Hello, I am currently working with Malaria Pf/Pan nitrocellulose membranes coated for malaria detection. After drying the coated membranes in an Incubator (overnight at 37°C), I've noticed that...

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Qiagen circulating nucleic acid kit poor yield?

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How to prepare materials before protein-peptide or protein-protein docking?

Hi all, I am conducting research on screening peptides (20-35 amino acids) with potential for treating dengue fever through protein-peptide docking methods. In the protein database, I found the...

10 July 2024 8,037 1 View