Does anyone know how to make generating gas packs to create anaerobic environment?

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Any suggestion of free of charge questionnaires that measure mood states?

I need a free of charge and short questionnaire that measures mood states. The questionnaire will be used as in a neuropsychological evaluation study. It is well known that mood states can...

16 January 2021 8,284 4 View

How to use iZON qNano for zeta analyser?

I have some doubts about iZON qNano for the zeta analyzer? I need to measure the zeta potential of my nanoparticles, but the samples have positive zeta potential around +20mV. I need to know how...

06 October 2020 7,976 3 View

Can I ask for your suggestions in freeze-drying PCR/LAMP mixes?

We have a project on development of a dry loop mediated isothermal amplification (LAMP)-based kit for detection of plant viruses on field site. One of the challenges in this project is the...

06 September 2020 8,531 4 View

What are the public biosignals (ECG, etc) or imaging datasets of COVID-19 patients?

I am looking for public datasets of COVID-19 patients with biosignal information (ECG, for instance) and/or imaging data (X-ray, CT scans). Found some CT scan datasets but with a low number of...

11 May 2020 8,961 5 View

Why we use HPLC-RP to determine the purity of new chemical entities?

I don't understand why we use HPLC as method to determine the purity of NCE/drugs in medicinal chemistry if the HPLC won't show everything that could be a impurity (only compounds with UV absortion).

02 February 2020 3,135 3 View

How do I build a tree to use em Paml?

I am trying to do some analyses using Paml, actually, I am using PamlX. The problem is that everytime I try to put a tree there, it shows the same error: Reading seq #87:...

06 January 2020 4,923 1 View

What is/are the best free database to deposit new genetic variants with clinical significance?

Preferably, some database that does not take long to respond and whose input is not so complicated. Thanks in advance!

10 May 2019 1,559 2 View

What Statistical test do you suggest for hydrologic data series?

Hi everyone I want to apply different probability distributions to series of maximum 24 hour precipitation data, maximun and low flows, , for 100 un-gauge stations in Colombia. After I want to...

09 April 2019 8,386 5 View

Does anybody have a protocol of ihc of paraffined samples for ki67?

We develeped a PDX model of osteosarcoma, using fresh tumor samples. Now we need a comparison of protein expression in the original tumors and the mouse tumors. I have never done ihc and was...

24 March 2019 3,143 2 View

Do you know of any solution adopted by island countries to avoid their disappearance caused by climate change?

As we know, some island countries like Tuvalu, Kiribati and the Maldives risk disappearing because of the climatic changes. Do you know of any solution adopted by island countries to avoid their...

27 February 2018 8,943 8 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

What is the best way to keep an anaerobic chamber anoxic in the absence of hydrogen?

I'm a graduate student who works with an anaerobe, so I often work in an anaerobic chamber. I've been working on an assay that involves the steady-state of the quinone/ quinol pool. Anoxic...

03 March 2021 2,971 1 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

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

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

Uncertianiny in using dry or wet basis in mixing a sediment with fuel oil?

Hello I'm currently working on a topic related to studying the anaerobic biodegradation of TPH in marine sediments. In this work, sediment should be mixed with fuel oil to a concentration of 20 g...

24 February 2021 9,839 3 View

Advice on growing lactobacillus species in the lab?

Hello everyone, For part of my PhD project, I'm hoping to grow some lactobacillus species in the lab so that I can create standard curves for a qPCR quantification of a faecal sample. However, I...

24 February 2021 3,157 6 View