Change in the surface area after modification?

Hello, dear Scientists I would like to know why in some cases, if you impregnate metal in a support (in different percentages, e.g.: 1%, 2%, 4%) the surface area of the final material do not...

09 October 2019 7,454 5 View

Coordination of ketones to iron?

Hello everyone, I would like to know if someone have a reference or a possible explanation about if ketones (2-propanone or ethyl acetate) could coordinate to iron (metal or cation)? Since...

08 September 2019 1,237 4 View

I have a error in gaussian G09 :( I need help? transition state?

Hi dear scientists! I am trying to find a transition state using QST2 and rob3ylp 6-31g(d,p)... Nevertheless, in all cases my run fails.. The next paragraph appear in my file.log: "Old...

01 February 2019 792 7 View

How can I explain that after incorporation of metal over surface of mesoporous materials, the acidity increase with a lower amount of metal....????

Hi dear Scientists! :) I was impregnating Fe or Cu over different mesoporous materials, and after TPDA analysis I concluding that when I decrease the percentage of metal over surface of...

10 November 2018 1,211 5 View

About acidity analysis with pyridine. ?

Hi everyone, I just have a problem to determine the amount in mili o micro moles of pyridine adsorbed in a material. I only have results of area of pyridine from company that they did the...

06 July 2018 9,134 1 View

About acidity of MCM-41 and SBA-15?

Hi scientists! I have a question related with the acidity of MCM-41 and SBA-15. I know that both supports present a low acidity (that could be verified by TPD of ammonia). But, I would like to...

03 April 2018 6,426 0 View

How to choose the best model in a experimental design? Box-Behken design vs central-composite design?

Hi Scientists!! I am trying to choose the best model in a experimental arrangement of four factors and three levels. I don't know what model is more correct? I chose Box-Behken but I am thinking...

09 October 2017 1,106 11 View

What is more stable: Ortho or para hydrogen?

08 September 2017 4,607 2 View

How to explain the second step in the reaction mechanism of alpha pinene epoxide with ethanol and temperature?

Hi, I'm trying to explain the formation of the final compound in the reaction of alpha pinene epoxide with ethanol, a very interesting topic in the formation of add-value chemical substances. I...

07 August 2017 9,986 4 View

How to work catalysts and solid phase using Gaussian?

Hi everybody, Actually, I am simulating some process using Gaussian G09, specifically some molecules adsorbed over silica. But, I don't know how to explain if Gaussian works in gas-phase, what...

02 March 2017 9,087 4 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

What kind of intervention will be relevant to increase motivation among young sport trainees?

Any suggestion on what book to read is also welcome.

03 March 2021 1,646 4 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 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

Do I need to strip the PVDF membrane before staining it with colloidal gold?

Dear Colleagues, After running Western blot on PVDF membrane and detection using ECL, I would like to stain my PVDF with colloidal gold to be able to allign the ECL image with total proteins on...

02 March 2021 7,829 3 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View

What element is driving the different slop in the low frequency tail?

My study consists simple corrosion inhibitors in salty brine. Right now I just fit my circuit with randles with CPE. Just wondering how the slop can given more info of the experiment. Or any...

01 March 2021 6,474 3 View

Does anyone know HRM channel in a 2 plex QIAGEN Rotor- Gene Q qPCR can be used as a separate channel?

I am going to have 3 different probes in my qPCR work that I am going to do. But I realized that the machine we have in the lab is a Rotor-Gene Q 2plex HRM Platform, saying it has green, yellow,...

01 March 2021 8,544 1 View