Can anyone elucidate a structure of an unknown antibiotic?

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Which antibiotic produced by Streptomyces sp. has maximum absorption (single peak) at 191 nm in Uv-Vis spectrophotometer?

I have yellow coloured crude antibiotic in fermented broth (Streptomyces smyrnaeus UKAQ_23; a new isolate). I scan this fermented broth which shows maximum absorption at 191 nm; 1 single big peak....

05 June 2018 2,795 5 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 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

Mixed ANOVA - help?

I'm currently working on a piece which asks to conduct an ANOVA - looking at the effect of sporting group (2 levels), and exercise trials (two trials with six levels). I've computed this all...

27 February 2021 9,626 4 View

How to Interpret Partial Eta Squared Numbers For a Repeated Measures Anova?

I have obtained Partial Eta Squared Numbers through Two-Way Mixed Anova Analysis. My results for different constructs are: .105, .135, .038, .068, .061 respectively. I wanted to know, whether...

24 February 2021 7,122 1 View

Interpretation of Goodman - Kruskal Gamma squared?

Dear colleages, Eta squared is dominantly used in reflecting the explaining power the same manner as a squared partial correlation coefficient (R2p ) from multiple linear regression: as the...

22 February 2021 7,801 3 View

How to Study a proton NMR of Graphene prepared by Electrochemical Exfoliation technique?

I performed a Proton NMR of graphene powder prepared by electrochemical exfoliation technique. It shows some peaks. But I can't understand it.

21 February 2021 8,947 3 View

Interpretation of a fluorescence Emission spectrum ?

Hello, i work with a spectrometer which only render the fluorescence emission spectrum. Until now i just found how to interpret an exitation- and emission spectrum together to generate deeper...

20 February 2021 1,291 3 View

In CDA analysis we have three stages, viz., description , interpretation, and reproduction. Why have all CDA studies neglected the third stage?

18 February 2021 6,483 3 View

How can I interpret a ratio variable?

Dear colleagues, I am running a regression in which I have the following regression FoodExp = 67.04 DepRatio +.....e My interest is in the interpretation of the coefficient on the dependency...

16 February 2021 2,058 2 View

Is There are any idea to achieve H NMR signals for swollen compound ??

the samples are not completely soluble - just swelled the solvents that's mean the sample may be partially soluble any suggestion, please

16 February 2021 8,801 3 View

Thamere Cheriet

i think you need masse spectra too to be sure fir what you can find in NMR structural elucidation

Stan Sykora

If you mail the (raw) data over to me, I will give it a try.

Amjad Alkhdhairawi

Usually H1 and C13 NMR will not be sufficient for structure elucidation if the product is entirely novel. If it's a natural product, you can send me the data I will check if it matches any known compounds in the natural products database I have.

Kamal Ahmad Qureshi

Hi sir please give me your email. I will send the raw data@Stan Sykora

Jun Uzawa

Analysis of natural organic compounds, including antibiotics, is a difficult task. I think it is a theme to be tackled even in the modern age when analysis methods have developed. And there are new developments in the new compounds emerging from there.

Eman Ramadan Elsharkawy

If you have all spectra analysis

HNMR,C13NMR, and mass

I can help you