What is the red autofluorescence in my HL60 cells?

A subset of my HL60 cells has red autofluorescence in the far red region (FL-3 > 670 nm). I first noticed this some months ago when I was checking an antibody with a PE-Cy5 tag by flow...

06 December 2020 6,005 2 View

Best ways to collect saliva from guinea pigs?

Hello, I am planning a reserch which involves analysis of saliva cortisol in guinea pigs. Unfortunately, I am currently having trouble collecting saliva samples from my guinea pigs. I am not able...

30 September 2020 9,226 1 View

Transfection in HFL-1 cells?

I am trying to transfect HFL-1 cells with a plasmid DNA. I used Lipofectamine 3000 from ThermoScientific, however the cells seem to react quite sensitive to the transfection (tried different...

17 November 2019 484 2 View

Is there a full list of scales from the FOCUS Questionnaire (van Muijen et al., 1999)?

Hi! I'm currently working on my Master's thesis and looking for the evaluative scales for the innovation and rules value orientation from the FOCUS Questionnaire developed by van Muijen et al....

05 May 2019 4,039 3 View

I have putted the 10fold amount of 2-Mercaptoethanol in my stripping buffer by mistake. Does anyone have experience with such a mistake?

I think my proteins on the PVDF membrane are gone, because there is nothing to detect anymore. But on the other hand the membranes smell after a lot of washing procedures still of 2-ME. Maybe my...

18 July 2018 171 3 View

Is there any relevance theoretical work that addresses the question of folk psychology?

This question is in connection with an article I am writing. Relevance theory seems potentially helpful for my argument, but I need to find work that explicitly addresses the link between the...

28 September 2015 8,493 3 View

Can anyone provide advice on how to model age captured in categories within SEM?

10 July 2015 4,972 15 View

How can I regenerate a Pt surface after polymerization?

I have a Pt crystal I would like to reuse. The Pt surface has been electrochemically grafted with a diazonium salt and subsequently polymerized with GMA. I'm thinking it should be possible to...

09 July 2015 5,149 2 View

Is there any recent work on literary language (or the nature thereof) or of "literariness" more generally?

Critics don't seem to be interested anymore in distinguishing between ordinary and literary language, but I'm wondering whether this is a crucial issue we need to return to.

06 October 2014 8,200 5 View

Can anyone suggest a material with the highest specific heat capacity (higher than water)?

Hi, I was wondering which material has the highest specific heat capacity? Most lists I could find have water at the top with 4.182 kJ/kgK. But I was wondering if there is a solid or liquid...

17 September 2014 5,850 3 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Is there any published or unpublished statistics on dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, US, UK or any other country?

Are there any published or unpublished statistics or papers on the dropout rate (Dose1 to Dose-2) for Covid-19 vaccination in India, USA, UK, or any other country where vaccination has started at...

28 February 2021 4,237 1 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View

Exit velocity of natural gas from pressurized tank?

Hi Guys. I'm a mechanical engineer and have a bit trouble, would be very glad if you could help me with my questions. I have a pressurized tank which contains Natural Gas at 200 Bar and 293...

26 February 2021 6,253 3 View

Gas sensor response and recovery time independant of flow rate and chamber volume?

I am trying to obtain the response and recovery times for my gas sensor device. It appears the the response/recovery times are primarily dependant on the flow rate of the gas I inject into the...

26 February 2021 1,511 3 View

Why do a weight decrease for thermal degradation in nitrogen gas condition?

Hi all The question is related to TGA(Thermogravimetric analysis). Thermal degradation easily understood but why do samples weight decrease? altough just binding is broked, the weight of...

26 February 2021 1,100 5 View