Sometimes in hot spot we observe a gold patina on surface of closed shrinkage cavity. What is it? It interesting to me because usually I observe it when we have a problem with casting.
Hi, i am conducting a Monte Carlo simulation for my new distribution but the MSE values are increasing while the sample size increase, does any experience this issue before and what should i do...
22 February 2021 3,680 4 View
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
There are a few papers dealing with the effects of climate change on the pollination of European orchids, but I wonder if similar studies have been carried out in the Tropics.
04 February 2021 1,818 4 View
Dear all, I am currently writing my master thesis where I am analysizing my data using path analysis and SEM in R (lavaan package). Now that I like to write up my results, I am struggling with...
04 February 2021 8,993 2 View
Dear colleagues: I have been trying to establish a few HP-TLC methods in the lab. In general, for quantification purposes, I prefer CuSO4+acid charring, to primuline staining. Lately I have been...
20 January 2021 9,019 1 View
I need to simulate a mushroom FSS and I'm struggling with the ports. What's the correct way to define them? Should I construct a proper SMA connectors, or is it enough to put a waveguide ports...
19 January 2021 6,590 4 View
i am working in transfer of images between two computer . I don't know how to make connection between Matlab and visual studio . i used a visual basic for programming my controller. Can anyone...
31 December 2020 6,708 4 View
While doing amplification with Primers ( which already gave good amplification in same genus), it fails many time, eventhough the extraction has enough amont of DNA.
31 December 2020 5,649 4 View
The last decade witnessed a tremendous use of computational power for various applications such as deep learning, MD simulations, and astrophysics. Is quantum computers really going to take the...
31 December 2020 1,396 2 View
sector A sample is 313, and sector B sample is 200. If I take sector B population in the whole country then sample B's comes = 330 Q. Can I take sector A in 5 cities and sector B in the whole...
27 December 2020 6,930 2 View
I am trying to extract possible Loriciferans from mudstone, attempts with acetic acid (15%) and chloridric acid (37%) have failed to dissolve the rock, would a higher concentration (50%) of HCl...
17 December 2020 5,897 7 View
There is a small section of a beach south of Tiros, Greece where most of the gravel is made up of these marble-like stones. While I was there suddenly several waves came ashore, but the sea was...
26 October 2020 5,797 4 View
Sucrosic and saddle dolomite are known to be different petrographically. However, are they different in structure, e.g., under XRD or TEM?
20 September 2020 2,495 2 View
I usually face the problem to distinguish between the dolomite and ankerite during the evaluation on powder XRD. Both of these minerals are found within the carbonate sedimentary rocks and belong...
09 April 2020 9,173 4 View
Dear Researchers, I found it from Permian limestone strata in Julfa province (North-West of the Iran country). It should be mentioned, this microfossil extracted from samples collected of the...
29 March 2020 574 5 View
Dear researchers, I'll be grateful if it is possible to recommend any method papers for extracting Radiolarian microfossils from the Middle to Upper Permian. Sincerely yours, Soheil.
22 March 2020 5,895 4 View
Core cleaning is a challenging task. In the case of chemical flooding, core samples are generally cleaned by methanol and toluene but in the case of nanoparticles, I am not able to get any solvent...
04 March 2020 5,713 7 View
Dear Researchers, I found it from Middle to Upper Permian limestone strata in Julfa NW Iran country. This microfossil extracted form sequences that belong to the Stratigraphy and bio-event...
16 February 2020 3,088 10 View
Hi everybody. I found this in a thin section of an oncolitic limestone that belong to late Jurassic - early Cretaceous period (Tithonian-Valanginian). im a begginer in this matters but my first...
01 February 2020 6,783 3 View
01 February 2020 1,973 6 View