Why do a weight decrease for thermal degradation in nitrogen gas condition?

Hi all The question is related to TGA(Thermogravimetric analysis). Thermal degradation easily understood but why do samples weight decrease? altough just binding is broked, the weight of...

26 February 2021 1,100 5 View

Is there and standard of Chemical price when writing a SCI paper?

Hello I writing a SCI paper and want to make a table for chemical price comparison. However, the chemical price varies from country and company, amount and also dates. Is there any reference...

12 January 2021 5,600 1 View

Can the activity of IPTG induced protein affect bacterial growth?

I inserted 4 different genes in vector, and cloned in E.coli. when I grow them on IPTG containing plate, Each bacteria grow different. If I pick each bacteria with different number, then each...

26 March 2020 4,476 3 View

Is there a material that can absorb (or reflect) a light in one-way?

Hi, I have a question about reflection, transmission, and absorption of light. Is there a material that can absorb (or reflect) a light in one-way? For example, there is a substrate that has a...

01 December 2019 370 5 View

How to make silver nanowires (Ag-Nws)?

I am trying to synthesize silver nanowires based on the article, [Rapid synthesis of silver nanowires through a CuCl- or CuCl2-mediated polyol process]. However, as I inject [AgNO3 in EG] into...

30 September 2019 7,266 1 View

How can FeNWs be dispersed in organic solvent?

Hi, Does somebody have an idea to disperse FeNWs (or AgNWs) in organic solvents such as acetone, chloroform, and ethyl acetate? If a surfactant does the trick, please recommend me a proper...

25 September 2019 644 3 View

SDS-PAGE of a 410-kDa protein with pI 10.44?

Dear colleagues, I am working on a protein with peculiar characteristics. It is reasonably abundant in stem and cancer cells: - Size: 410 kDa - pI: 10.44 - Unusually rich in isoleucine and...

18 September 2019 321 2 View

How high is NAFION membrane permeable to water??

Hi. I am interested in a membrane that has high permeability to water and low(appropriate) permeability to cation. And I found that NAFION can absorb and permeate water. Does anybody know the...

28 March 2019 9,014 1 View

Is there any membrane that only permeates water (not ions)?

Hi. Does anybody know a membrane that only permeates water (extremely low permeability to ions)? I would like to make a system that, when pressure is applied to a chamber in which a certain...

21 March 2019 1,663 3 View

How to reduce noise in eletrophysiology setup?

Hi, I have some problem with my multiclamp setup. I'vd tried several ways that I know, I couldn't improved the noise. very first time, the noise gap is around 40 pA. After I ground, microscope...

31 December 2018 8,008 2 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Does Napabucasin soluble in dichloromethane and in ethanol?

I need to prepare a solution of Napabucasin (inhibitor of cancer cell stemness) in dichloromethane. The drug is expensive, so maybe somebody already tried to do it. If it is soluble, what is the...

02 March 2021 9,945 3 View

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 3 View

Which database would give me this list of chemical components?

Dear colleagues: I would like to know if anyone knows of a database that gives me the parameters pH, K, K, Mg, P, C, N, Zn, Cu, Ni and Cd of common foods. I find a lot of information of proteins,...

26 February 2021 5,525 3 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

Why is NH4OH added in heavy metals limit test?

The limit test I'm referring to is USP method II. In this procedure you need to dropwise add 6N of NH4OH to the sample until it the pH is alkali. After that you need to dilute and add HOAc until...

23 February 2021 2,049 3 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View

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22 February 2021 9,932 11 View

How to seperate PEG-4000 from aqueuse phase ?

Hello everyone , Please tell me if It possible to seperat POlyethelyn glycol -4000 from an aqueuse media by other ways rather heating . I have tried salting out by electrolyte solution to...

22 February 2021 7,285 5 View

Can anyone help or comment on solubilising chlorobutanol in aqueous injections in minimum time possible?

Please suggest solubilisation of chlorobutanol in injections. Tried pH and high temperature. But the issue is of assay drop. If anyone can suggest any solution. Its a commonly used excipient for...

21 February 2021 7,397 1 View