What program can I use to caclulate dipole moment efficiently and without the need of excessive computation?

Hi, I am a third year chemistry undergrad doing my group project in which I need to predict the HPLC retention time of 20 aromatic molecules. to do this we require the chemical properties of these...

24 February 2021 1,384 3 View

Do you kow of any database containing data on retention time, log P and polarizability for a large number of molecules?

Hi, I am a chemistry undergraduate doing my dissertation project on HPLC. In my project, I need to predict the HPLC retention time of 20 aromatic molecules, the calibration set. To do this I will...

24 February 2021 2,602 1 View

Extraction of DNA from insect samples conserved in silica gel?

Hi everybody, can anybody suggest how to extract DNA from insect samples conserved in silica gel (in my case, mosquitoes)? Does anybody know a commericial kit which does that or a particular...

10 February 2021 3,392 4 View

After SARS-CoV-2 has lost its envelope, e.g. due to surfactant disinfectants, could the RNA alone be a infectious agent for COVID-19?

Although surfactant disinfectants are generally considered to have virucidal activity against all lipid enveloped viruses, some authors claim their inefficiency against SARS-CoV-2 (as it happens...

13 July 2020 7,389 4 View

Could the end of the spread of COVID-19 be determined by environmental factors?

Beyond temperature and humidity, are there other parameters that can explain the winter spread of COVID-19? I would like to know the various opinions and scientific evidence on this intriguing issue.

27 May 2020 3,357 13 View

Could the search for a pandemic culprit lead to conflicts or new Cold Wars among Countries?

I'd like to share opinions and evidence on the following topic: Is the search for a culprit of the COVID-19 pandemic, assuming that it is an investigation with a reliably achievable result, a...

22 May 2020 5,803 8 View

Lentivirus particle production - Where's the integrase?

Hi everyone, I am facing a technical question about lentivirus production. I am going to use a 2nd generation system, in particular the widely used psPAX2 and pMD2.G. My doubt is about the...

24 March 2020 3,395 3 View

What is in your opinion the best model to test these relationships? Multiple regression, SEM..?

Dear all, I hope you can give me your opinion about this. I have to test the following relationships (see attached image): X1 to X4 are my main independent variables; they cannot be measured...

26 February 2020 8,769 12 View

How to determine dCas9 (Nickase) cut efficiency?

I was wondering if there is any quick tool to quantify the cut efficiency of a nickase strategy. I was thinking about TIDE, querying it using either gRNA. Would you think this is a meaningful...

22 July 2019 3,306 1 View

Using powders to characterize the crystalline phase of a thin film?

I made some Metal Oxides thin films by spin coating a solgel solution on a substrate but don't have grazing incidence XRD at my disposal. Is it reasonable to dry the gel solution, treat it...

06 December 2018 8,230 3 View

How to code open-ended questions in SPSS?

Hello all, In SPSS I am going to code 2 open-ended questions. I have already read all the answers and I made a list of the most important categories to which I can code the answers. This question...

02 March 2021 1,757 4 View

Is there a powerful system for the security of the systems distributed on IoT systems?

Is there a powerful system for the security of the systems distributed on IoT systems?

02 March 2021 3,858 10 View

New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before?

Question to you and THEM, the New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before? There appears to be a core problem for...

02 March 2021 3,024 2 View

Can you share me how teacher education is managed in your respective national educational system?

I feel that the practice in teacher education in my country is below the expected performance level due to very poor management system. Hope I will learn something from your experiences.

02 March 2021 1,516 4 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How to choose ANN number of hidden layers and nodes?

Hello, Could you please share any interesting research explaining how to choose the number of hidden layers and nodes per layer in case of regression problems using ANN? Thank you, any help would...

01 March 2021 6,200 3 View

PUC19 as a transfer plasmid for lentiviral delivery?

Hello, Is it possible to use pUC19 as a transfer vector to be packed in using the second generation viral particles packaging system( pMD2.G; psPAX2 plasmids)? As far as I understand it there is...

28 February 2021 4,868 2 View

How to eliminate Steady state error from Reinforcement learning genetic algorithm code?

The following code (see 1st 2 images attached) is used to produce PID controller values that are designed to control the system (G). The code finds the PID controller values (noted as k) by using...

28 February 2021 6,560 14 View

How could I take into consideration the weights of observation in a system of seemingly unrelated regressions (SUR) in rstudio?

I build a model of 4 regression equations (probit and OLS) in R studio. I need to take the weights of observations into consideration. While it is simple to do so for every regression equation,...

27 February 2021 1,233 1 View