Can elements concentration be affected by microbial growth?

More Azlan Nazeri 亚之兰) アズラン's questions See All

How to calculate original TOC and HI?

Hi everyone. Need a help here. I'm currently doing a source rock characterization for my research. However, I'm a bit confuse on how to calculate original TOC and HI from several complicated...

22 February 2024 3,464 0 View

How to Determine Detection Limit for XRF?

Dear All As we know, to determine the detection limit for AAS /ICP, we can do 10 blank tests and then calculate the standard deviation, so that LOD and LOQ can be calculated. My question is how...

23 March 2022 9,116 4 View

Standard code to design HDPE tank?

Dear All What standard code to design HDPE (High density polyethlene) tank? for carbon steel can use API 650 (oil storage) For pipe usually can use Asme B31.3 (SS and CS)

20 June 2021 8,873 1 View

Evaporation rate for n-Hexane?

Hi all May I know what the value of evaporation rate (ER) for n-hexane? I wanna to calculate the ventilation rate, Q. At safety data sheet (SDS) is also not provide the ER information ii)...

05 August 2020 6,972 3 View

Hi. Anyone have come across this issue where the baseline is shifted like this when running the hplc? Is it due to contamination or else?

Mobile phase used is 5mM sulphuric acid , type of column is Bio-Rad Aminex

09 July 2020 9,492 7 View

Hi. Do you have any idea why the peak looks like that as I guess this is the solvent peak produced?

I have run the levulinic acid standard through hplc-refractive index detector with column and detector temp at 63 and 50 degree respectively. Mobile phase used is 0.005 M H2SO4 at flow rate 0.6...

12 November 2019 6,513 2 View

K-Fold and Random Subsampling (RSS) Dataset generation?

Let say if I have a large dataset of 300k instances with 200 features, I want to reduce its size. Can I apply K-Fold technique to the 200 features then the trimmed dataset are applied with RSS to...

24 May 2019 571 0 View

How to model monthly riverflow data for artificial immune system?

Dear Prof. Marlinda, My name is Ammar Azlan from UUM Sintok. I'm writing a paper on gold price prediction using clonal selection algorithm. I'm having problem modelling the time series data set...

29 January 2019 6,259 0 View

How to remove residual broth media from lignocellulose (biochar) powder for FTIR analysis?

Briefly, cellulolytic bacterial cultures were inoculated into a flask containing minimal media (containing K2HPO4, KH2PO4, MgSO4.7H2O, NaCl, NaNO3 and CaCO3) supplemented with biochar (as sole C...

26 November 2018 8,879 3 View

How Transfer data/image from GPU to FPGA using MATLAB ?

Currently I Already did my work to transfer image on GPU and CPU. Apart from that, i try to expand the work with FPGA. Unfortunately, i still searching the suitable method how communicate CPU and...

10 October 2018 3,214 3 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

How to calculate CCS for Sodiated adduct ions and Multiply Charged Ions?

I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...

08 August 2024 8,329 0 View

Why do i have a weak plasma and no coating during rf sputtering?

I have been getting a low plasma and no coating while doing rf sputtering of copper doped ZnS using a power of 140 watts and at pressure of 6.5x10-3 Mb.

07 August 2024 4,526 4 View

How much total RNA concentration to be extracted from sorted plasma cells from bone marrow of C57BL/6 mice for RT-PCR ?

i have sorted anti-NP specific plasma cells from bone marrow of C57BL/6 mice at certain times after immunization with variable counts and isolated total RNA using TRIZOL method for RT-PCR using...

05 August 2024 8,835 1 View

How can major oxides determined by ICP-MS/ES be normalized to 100% volatile free? How does this connect with LOI?

I am analyzing cherts from different sources found within one specific geologic formation using ICP-MS/ES. My committee was asking this question about my analysis. I was not sure how to answer this

05 August 2024 7,902 3 View

What are the best (less toxic to human) methods of microbial lab fumigation?

We are planning to establish a microbial laboratory in our research center and are actively seeking the best disinfection methods. If anyone has any recommendations, please let us know. Thank you.

04 August 2024 1,973 1 View

Gas chromatography RT detection?

I am working on algal extract to which gas chromatography (Not GC-MS) spectrum I want to discover. My question is can we identify specific compounds using retention time if I compared the RT with...

29 July 2024 8,034 4 View

How to select relevant metabolites from multiple annotations ?

I am using the Polyomics Integrated Metabolomics Pipeline (PiMP) for metabolite feature analysis. After annotating my data, I have encountered cases where multiple potential metabolites are...

24 July 2024 5,789 0 View

I encountered a situation where the 16s PCR amplification worked perfectly with the DNA from the same sample, but using the same sample Don't working?

I isolated microbial DNA from marine water samples taken at various sites using the Qiagen Power Water DNA Isolation Kit, including a modified enzymatic lysis step. I encountered a situation where...

24 July 2024 9,688 0 View

How can microbial engineering techniques be used to enhance the functionality and efficacy of probiotics ?

through genetic modification or metabolic engineering? Is it helpful, good for health ?

22 July 2024 7,811 4 View

William Senior

La congelación Detiene EL CRECIMIENTO de Todos los microorganismos. ... LA VELOCIDAD SE VE de termodestrucción Afectada POR Factores intrínsecos (Diferencia ... Sobre la susceptibilidad de las Diferentes Especies microbianas A la radiación UV: ... Aumentando la Concentración de solutos en la fase acuosa de los Alimentos

Zoë Gaffen

Have you tried using Sodium Azide in your solutions? I used to use 0.1-0.2%(w/v) Sodium azide in all my HPLC buffers, to prevent bacterial growth.