Cause of different date display in Yan Gelli HPLC when injecting sample?

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When and how to apply Bonferroni correction?

Dear colleagues, I have encountered a statistical issue involving the analysis of Likert scale data, specifically using the POSAS scare scale, in a paired situation. The scale comprises numerous...

19 January 2024 281 6 View

Is there anyone willing to collaborate in Writing tutorial articles about statistics and methodology in different field?

Hi, I am Dr. Farzan Madadizadeh, I have a PhD in Biostatistics and I have been an assistant professor in one of the medical universities in Iran for 4 years. I am very interested in writing...

21 June 2022 4,866 5 View

Degree of substitution?

Hello, I need to ask about why DS value is decreasing when increasing molar ratio of reagent? First I would like to tell that I performed 5 synthesis of cellulose with vinyl laurate. The result of...

22 March 2021 4,052 3 View

How much neutralizer (For example tween 80) should be added to the culture medium to neutralize the antibacterial on the product?

Hello I would like to run a sterility test for surgical sutures. How much neutralizing agent should I add to one liter of the culture medium to eliminate the antibacterial effects that have been...

04 October 2019 4,194 4 View

How can measure microbial contamination in the clean room?

Hello We have a clean room with a space of 118 square meters, I have two questions from you: 1) How many plates should I put into this space to measure the microbial contamination? 2) How many...

17 December 2018 1,557 4 View

Has anyone used DPSS lasers from CivilLaser (https://www.civillaser.com/)? How is the quality of their products?

I am looking for a relatively low-cost laser for flow visualization applications. I found CivilLaser website which seem to offer decent prices on their DPSS 532nm lasers. However, I am concerned...

25 October 2017 4,016 2 View

How can I calculate the heat transfer coefficient of a heat sink?

Greeting everyone; I’m going to design an optimum design of multiple fin arrays ( I have attached a schematic of that system). Should I consider this system as External Forced Convection or...

19 November 2016 9,730 7 View

Which is the best technique to mass screen Oral squamous cell carcinoma lesions?

Five-year survival of oral cancer varies from 81% for patients with localized disease to 42% for those with regional disease and to 17% if distant metastases are present. Generally, due to...

23 October 2014 6,060 14 View

How can I merge two descriptions of a video, in JM reference software, if possible?

Hi. I have two descriptions of a video sequence, which are encoded using JM reference software. The question is, how can I merge these two low-quality descriptions to get a higher quality video...

29 August 2014 1,712 4 View

In the Node Place value method, which one is correct?

1- X6=1-((a-b/d)-(a-c/d))/2 2- X6=1-(((a-b)/d)-((a-c)/d))/2 a=max(X1,X2,X3,X4,X5) b=min(X1,X2,X3,X4,X5) c=(X1+X2+X3+X4+X5)/5 d=(X1+X2+X3+X4+X5)

14 May 2014 3,064 1 View

Which type of compound does lamda max of 218 indicate in a uv-vis spectrum of a partially purified compound through column and TLC?

A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...

11 August 2024 9,801 2 View

How to learn more about SPSS and its Application?

I would like to learn more about SPSS and Its application especially in regards to data analysis. Please suggest me how I can learn more about it. Thank you so much.

11 August 2024 9,101 4 View

Can you connect an HPLC to a Mass Spec only at a certain time point?

Can anyone explain this method? Especially the last statement where it says only at 1.5 to 2.5mins was the MS/MS connected to the UPLC. How is that possible, is it a feature in this specific...

11 August 2024 8,141 3 View

Has anyone applied Python in the field of textile engineering for data analysis, automation, or smart textiles?

I'm currently exploring the application of Python in textile engineering, specifically in areas like data analysis, process automation, and the development of smart textiles. I'm interested in...

10 August 2024 7,429 2 View

GC-MS retention index prediticon?

Hello experts, Does anyone know any free software about retention index prediction ?

08 August 2024 7,403 2 View

Can I use a HisTRAP column for affinity chromatography?

I'm working on selecting antibodies against a recombinant protein that has a His-tag. My idea is to first bind the recombinant protein to a HisTRAP column and then use this column for an affinity...

07 August 2024 505 3 View

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

Why is electronic energy 0.000 for liquid crystal compounds and is invariable with temperature in Guassian 09 software?

Are there any suggestions or insights you can provide to help address this problem

06 August 2024 1,443 2 View

RNA later for the preservation of RNA in fecal samples at room temperature for one day (37°C)?

I am planning to collect human fecal samples for metatranscriptomic analysis using MGI. These samples are from indigenous people living in a region with high temperatures. I will have access to a...

06 August 2024 1,367 3 View

How can we use mobile apps for improving students' academic performance?

Mobile apps can be a powerful tool for enhancing academic performance, how can we use mobile apps for improving academic performance

04 August 2024 9,492 0 View