11 February 2025 1 2K Report

I'm having trouble on seeding my culture, they seem to comeback from freezing quite bad and easilly die. Can somebody help me with a tip or protocol for them?

More Bruno Costa's questions See All
PBMC infection with virus?

In my study, I intend to infect PBMCs with SARS-CoV-2. After that, I will analyze NK cells by flow cytometry to see if their phenotype changes or if they show degranulation. After the infection, I...

01 August 2024 4,403 4 View

Can biogeographical regions work as a character in a character matrix for a phylogenetic analysis?

Basically I'm helping with the matrix using a cosmolitan group, could one of the characters used for be biogeographical regions (Neartic, Neotropical, etc)? Most of the data in this matrix refers...

25 July 2024 9,753 2 View

Dataset of synchronized cardiac angiography and ECG?

Hello, I'm working on medical project and I would need synchronized angiography with ECG? Does anyone know if some open source dataset of this kind exist? Regards, Bruno

25 July 2024 2,214 2 View

Culture plates for PBMC (non-adherent). For infection?

Hello, good morning. I would like to know which plate I can use to infect fresh PBMC with virus and culture for 24 hours. I have tried using 12-well and 24-well plates, but many cells adhere and...

24 July 2024 2,158 2 View

Cheaper alternative to XSens mocap system for ergonomic data acquisition?

Hello all, I'm starting a project where we want to automate the video analysis of people working in different environments to produce ergonomic measures like hip flexion, shoulder extension, etc....

16 June 2024 1,843 1 View

Why are my nanoliposomes turning purple??

Hello, I am making lipid nanoparticles using the thin film hydration method. Formula is DODMA:DSPC:Cholesterol:DSG-PEG2000 at 60:20:17.5:2.5 %mM in 5mM total. After hydration in sodium acetate...

16 June 2024 6,842 6 View

Isssues making a thin film of lipids for nanoliposomes?

Hello, Im trying to make a nanoliposome to encapsulate plasmid DNA. I am using the standard thin film method followed by resuspension in sodium acetate 25mM pH4 with my DNA (Im using the...

05 June 2024 3,646 3 View

Junichi nishizawas "failures"?

junichi nishizawa was a great scientiest and inventor of japan. I want to know about Junichi Nishizawa Failures and/or Criticism.

28 May 2024 4,547 1 View

Is it possible that the binding energy of heavy quarkonia becomes more and more negative as the temperature increases?

I saw in many articles that quarkonia has negative binding energy and at some places it also has positive value but the pattern of binding energy is always decreasing...... Can anyone explain this...

15 May 2024 6,918 0 View

How can I set the distance between peptide and bilayer using Packmol?

I still find Packmol very tricky with parameters. I have two pdb files, one with a pre-quilibrated bilayer and one with the peptide of interest. How can I create a system with three copies of the...

29 April 2024 8,231 1 View

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Why Do TDS and EC Increase with Larger Wastewater Volumes, While BOD and COD Decrease?

I have carried out MFC experiments on three different volumes, 50, 500 and 1000 mL of wastewater. Results after MFC treatment shows that TDS and EC are more in larger volumes of water i.e. TDS and...

09 August 2024 9,621 0 View

Could it be a cell culture contamination?

Hello everyone! I observed in my culture (htert-RPE1 cells) an orange- red particle at the bottom of the dish. It is visible to the naked eye as a very very small red dot. Could it be a...

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Is there any way to quantify bacterial and fungal cells in their mixed culture?

I am working in fungal fermentation of soybean meal and there is bacterial growth in them at times. I am trying to quantify fungal cell counts and bacterial cells; but I haven't been able to do at...

07 August 2024 7,535 4 View

Can formaldehyd-fixed gelatin be melt?

I am puzzled about the properties of gelatin, when used for tissue-embedding. Hard gelatin can be melt again by temperatures about 40°C. Formalin-fixed gelatin is like crosslinked protein and...

07 August 2024 1,686 1 View

How to normalize and take the significance of the MTT OD values with 3 replicates for the same cell-line?

Hi, I have a question about normalizing the MTT OD values for doing the statistical analysis. So, if we have 3 different plates and we call them 3 different replicates, so, first we would...

07 August 2024 8,106 4 View

Why activated CAR-Jurkat cell could not kill targets?

Previously when I co-coluture anti-CD19(FMC63) CAR-Jurkat with Raji with E:T=5:1, Jurkat can eliminate Raji in 24h. However, when I test another CAR construct, although I can dectect totally CD69...

06 August 2024 641 2 View

How to isolate lymphocytes from mouse spleen?

I have tried several times to isolate lymphocytes from mouse spleen, but all attempts have been unsuccessful. I tried most available protocols. I used different dissociation media (HBSS with Ca...

04 August 2024 9,913 7 View

How to Add Missing Water Molecules in Protein-Membrane Simulations?

I have protein-membrane simulations (PDB, PSF, DCD) and have noticed that water molecules near the protein are not visible in the simulations. How can I fix this issue? Is there a way to place the...

04 August 2024 1,200 2 View

Does long-term culture of murine Monocytes result in macrophage differentiation?

Hi, I am isolating monocytes from the bone marrow using the Mouse Monocyte EasySep kit. I want to treat these cells and monitor expression of specific markers over the course of 10 days. I will...

04 August 2024 7,282 2 View

Good Day, can I ask for your help on the questionnaire that I want to adopt?

I am currently looking for a questionnaire that relates with my study which is The Effectiveness of Organizational Culture towards employee retention rates

03 August 2024 3,505 6 View

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