Why is the yield of using the 2-fluoroboronic acid coupling with 4-methoxylisatin much lower than using 4-fluoroboroic acid?

I am synthesizing the compound 1 by using chan-lam reaction as the figure showing. However, the conversion yield of ortho fluoroboronic acid (less than 20% on LC/MS) is much lower than the para...

01 June 2019 3,114 9 View

How is Reynolds boundary conditions in the circumferential direction of finite width journal bearing considered in Finite Element method?

I am writing the code of FEM applied to lubrication problem in Matlab. I found little introduction of boundary conditions in the circumferential direction of finite width journal bearing in many...

04 May 2019 5,448 1 View

A leading journal Ultrasonics Sonochemistry will become an open access journal after January 2021. Bad or good for authors?

I think it is not good news for a faithful author of US. The journal quality will descend or not? The IF will descend or not?

01 January 1970 5,535 6 View

Control in microstructure with growth inhibitor?

Dear researchers, I wish to understand the role of grain growth inhibitor in controlling the microstructure of the ceramic pellet. How it controls the growth? Also, I wish to know the grain...

15 January 2021 3,859 3 View

Which variables can be used to increase/decrease the grain size of czochralski-grown polycrystalline silicon?

Which variables (such as pull speed, melt temperature, annealing temperature/duration, cooling rate, etc.) affect the grain size of czochralski-grown polycrystalline silicon? In what direction...

10 January 2021 2,204 6 View

Is grain boundary scattering 'always' dominant over surface scattering in grained metal/semiconductor thin films?

Hi all, I was wondering if there is some theoretical insight in the relative contribution to the resistivity of grained thin metal or semiconductor films coming from bulk grain boundary...

18 December 2020 2,969 3 View

How to estimate the effect of nematodes on some varieties of wheat?what are the correlation possible to do ?

Hi , I carried out a test on the behavior of some varieties of durum wheat with respect to the CCNs, two successive years, in pots, and I inoculated with the same number of cysts (Pi), at the end...

05 December 2020 7,187 3 View

How can we study ionic conductivity of nano particles through grain boundaries using electrochemical study?

How can we study ionic conductivity of nano particles through grain boundaries using electrochemical study? We have CV and FRA data.... Can these data, supported by TEM, throw light on the...

10 November 2020 5,176 4 View

I need helper for interpretation of FTIR Graphs, anybody could help?

Can anybody help with interpretation of FTIR Graphs to read peaks of graphs for fruit bars made from fruits, herb and cereal?

18 May 2020 6,159 2 View

How can I reveal high strength spring steel prior austenite grain boundaries?

I have been trying to reveal prior austenite grain boundaries by etching without success. the composition (wt %) is 0.59 carbon, 0.8 Manganese, 1.20 Chromium 0.90 Silicon.

30 March 2020 1,721 3 View

How to define grain boundary hardness?

08 March 2020 3,388 11 View

Conversion of microstructure image using software?

i have few thermal etched samples which had a layer of oxide formed on top of it. back polishing removed some of it. but more polishing may cause the grain structure to disappear. i have to see...

02 March 2020 8,760 3 View

Conversion of microstructure image using software?

i have few thermal etched samples which had a layer of oxide formed on top of it. back polishing removed some of it. but more polishing may cause the grain structure to disappear. i have to see...

01 March 2020 914 6 View