Should we use yield strength or ultimate tensile strength in fatigue test for metallic material? What is the minimum load level we need to use?

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How to correctly use the UTE and ZTE pulse sequences in Bruker's ParaVision software?

I am using a Bruker 600M solid-state NMR spectrometer with a Micro 2.5 microimaging system. The test sample is a tube of 1M LiCl aqueous solution, and the nucleus detected is 1H. I am trying to...

01 August 2024 9,227 1 View

How to fix install package meta in R?

> library(meta) Error: package or namespace load failed for ‘meta’ in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]): there is no package called ‘numDeriv’

18 July 2024 3,536 0 View

How to improve my plaque assay for influenza virus?

I used MDCK cells for my plaque assay for influenza virus and seeded 950,000cells/well in 6-well two days before infection. The virus was diluted in FBS-free MEM with 0.5ug/ml TPCK-trypsin. Here...

11 July 2024 5,669 5 View

How to download fasta files in "gene features" format from NCBI with multiple samples in R?

Hello, I was attempting to download some sequences data from NCBI. The format "gene features" could help me extract certain gene fractions using the names, but I found that it seems to be...

04 July 2024 9,875 1 View

How to remove aluminium oxide from powder ?

I synthesise intermetallic compounds through nickel and aluminium powders. But the pure powder after synthesis is difficult to obtain. Especially the presence of aluminium oxide very seriously...

01 July 2024 4,030 3 View

The difference between the E. Laviron's model and RICHARD S. Nicholson's model for electrode reaction kinetics?

For the measurement of electrode reaction kinetics and electron transfer rate constant, using E. Laviron's model and RICHARD S. Nicholson's model, the greater peak potential separation indicates...

30 June 2024 580 3 View

Impact of nuclear-mitochondrial DNA segments (NUMTs) in phylogeny construction?

"Nuclear-mitochondrial DNA segments (NUMTs) are mitochondrial DNA (mtDNA) fragments that have been inserted into the nuclear genome." (Xue et al., 2023) I would like to know under this...

20 June 2024 603 1 View

Can anyone recommend high-quality GSDMD antibodies for immunofluorescent or immunohistochemical staining in mice?

11 June 2024 6,948 1 View

Why do I have an increasing concentration for increasing dilutions on spectroscopy even though they should all be the same final concentration?

Hello. We have a sample with an unknown concentration of polyphenols. We're diluting the sample in order to perform the Folin Ciocalteau method. 0.2 grams sample / 4 mL 70% methanol and 30%...

10 June 2024 2,134 3 View

How to detect mitochondrial ROS production in BMDM using mitoSOX red?

Hi everybody! I got some strange results when I tested mitoSOX RED on Bone marrow-derived Macrophages. According to the publications, bone marrow-derived macrophages(BMDMs) generally show...

03 June 2024 9,853 1 View

Adhesion strength of coating?

How can I determine a good adhesion strength range for coatings on polymer surfaces, such as DLC on polymer substrates? Is there a specific threshold for adhesion strength (from T-peel tests)...

10 August 2024 942 3 View

Can anyone explain why there is not any color bands in the middle portion of the tensile coupon?

Details of the Analysis. Static Analysis Composite Layup Continuum Shell Elements FRP Material (Elastic and Hashin Damage)

03 August 2024 8,538 4 View

London dispersion in CCl4 vs the dipole-dipoles force strength in CHCl3?

How do you tie-break and rank these two in their strength?

03 August 2024 4,471 1 View

What are the limitations and challenges of using machine learning for predicting concrete compressive strength in practical applications?

Machine learning (ML) has shown great potential in predicting the compressive strength of concrete, an important property for structural engineering. However, its practical application comes with...

03 August 2024 2,546 2 View

A twin-shaft kiln or a rotary kiln for lime production 1 class? if compressive strength of limestone is low 60 MPa?

My research work is related to the calcination of limestone. I have a complex question and would like to consult with experts in this field. Could you please advise which kiln to choose (a...

18 July 2024 1,390 2 View

Why my simulation results are showing too much deformation compared to experimental result?

I performed fea on tensile dog bone specimen using ANSYS static structural and also tried using ANSYS explicit dynamics. In experimental result the load is 500 N and deformation is 0.6 mm...

13 July 2024 3,631 4 View

What is the mathematical expressionof theoretical yield strength calculated considering solution strengthening in stainless steel 316L?

In the expression for solid solution strengthening model that has been widely used in the literature use a linear form consisting of strength coefficient, and concentration of elements in wt.%....

11 July 2024 4,476 3 View

Can someone explain the pros and cons of mean squares vs. Baker's ratio for pinpointing gene action in line x tester designs?

In plant breeding research, line x tester mating designs are often used to assess gene action for various traits. Some studies suggest that the simultaneous significant mean squares for lines,...

30 June 2024 4,877 2 View

How to calculate Module Young from compressive strength and strain curve ?

How to calculate Module Young from compressive strength and strain curve

29 June 2024 817 3 View

Does Trizol LS yield more and better RNA than normal Trizol?

Hi, I am currently working on RNA extraction on blood serum samples using Trizol. However, the RNA yield is quite bad, on average, only yielded 200ng per 200ul of sample input, and the A260/280...

18 June 2024 6,854 3 View