Estimate Beta is .00, yet it's significant?

Hi everyone, I've run an analysis of a latent 3-way interaction in Mplus (Y on XWZ). The estimate for this path is 0.000. S.E. is 0.000. Est./S.E. is 2.034. Two tailed p-value is 0.042. So,...

08 December 2020 2,132 4 View

What is the double layer capacitance of a 1 sq-cm smooth gold electrode in 0.1N (0.05M) Sulfuric Acid?

Is there an empirical or theoretical standard value for this (at room temperature) and for different electrolyte concentrations? Is there a resource available that provides a chart of values for...

29 November 2020 6,937 2 View

How does the concentration of atmospheric oxygen near ground level vary with time?

Hello, I am interested in how the concentration of O2 varies over time close to ground level. I have been informed that the concentration can drop when an inversion layer is present in the local...

19 November 2020 2,328 3 View

How does one calculate the best volume of nickel gel to use in a protein purification?

We know the capacity of the gel and the total amount of protein in the bacterial lysate from a Bradford assay. What we do not know is what fraction of the total protein is the his-tagged protein...

15 November 2020 4,664 2 View

Final temperature of water leaving an ice bath through copper tubing?

I have water flowing at 4 GPM at 2.5 feet per second through 50ft of 0.375 in. outer diameter tubing with 0.014 in. wall thickness. The water flows through copper tubing into the 50ft coil...

01 November 2020 8,039 5 View

Is it acceptable to publish data that were digitized from a previously published plot/figure (referencing the original figure of course)?

There are many ways to extract original source data from figures and plots in publications. If one were to do that and reanalyze the data in the same or a different way, is that acceptable in a...

28 October 2020 3,822 2 View

Methods to attach glutathione agarose resin to glass slide?

Hello, I am looking to capture a GST tagged protein on a glass slide. I was wondering if anyone had any experiences with glutathoine agarose resin. I realize this is commonly used in affinity...

13 July 2020 1,773 3 View

Where to find predator:prey mass data (for terrestrial carnivores)?

I'm looking for datasets (or databases) in which the body mass of predator and prey are presented. I'm specifically interested in terrestrial predators (snakes, mammals, birds). An example of is...

16 June 2020 2,453 9 View

How to calculate the overlap between animal distributions (Shape or .shp file)?

I would like to calculate the overlap between the distributions of two sets of data (predator & prey). The prey set has got about 250 species, the predator set approximately 5000. For each...

21 May 2020 6,726 3 View

Who can assist with an ingredient design of a Covid 19 Sars-2 Cov protein subunit and adjuvant vaccine?

18 May 2020 1,675 13 View

Must a control group to be in the same semester that a experimental group for a study in education?

Hi everyone, I'm researching about mobile learning in higher education. Due to the small number of the students in the semesters, I cannot have a experimental and control group together. I'm...

22 February 2021 3,653 11 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

How to perform Cox proportional hazard analysis or Kaplan-meier survival analysis in SPSS?

At first please see the attachment. This experiment was performed for a period of 7 days (n=100). After 7 days, we found different level of survival rate (%) for each treatment. Now, I want to...

15 February 2021 9,145 2 View

What is the difference between Graphene Oxide and Expanded Graphite?

What are the main differences between Graphene Oxide and Expanded graphite, in terms of surface functionalities, conductivity, d-spacing and other features? Is the term expanded graphite...

06 February 2021 9,810 4 View

Is it safe to open educational institutes amid new cases of Covid-19 without completion of vaccination??

Vaccination is in its First phase in India. The front line is to be vaccinated yet. In this situation opening of institutes may be dangerous for the life of children.

01 February 2021 660 2 View

How long should be stable a functionalized CNT? and how can I increase its stability?

I have functionalized MWCNT via both acidic and noncovalent rout, For acidic treatment I have used H2SO4:HNO3 (3:1) while ultrasonication at 55 C, and in non-covalent I used Triton x100, but the...

27 January 2021 4,497 3 View

In your opinion, Which are conditions more dangerous for the peoples of the world?

In your opinion, Which are conditions more dangerous for the peoples of the world? Ignorance of peoples, Poverty of peoples, Enslavement of peoples, Epidemics spread. Share us your opinion, and...

21 January 2021 5,974 80 View

Is there a simple protocol for short-term coating or fixation of surfaces with silver nanoparticles ?

Dear colleagues Is there a simple protocol for short-term coating or fixation (just some hours) of surfaces with silver nanoparticles (Heating? Irradiation ? pH ?) ? I wonder if there is a way...

20 January 2021 2,439 3 View

How do I dissolve a TPU (Texin RxT85A) in THF?

I want to make a 6% solution of Texin RxT85A in THF. I weighed the necessary amount of Texin resin and mixed at room temperature with THF with the help of a wooden stick, this did not work at all....

18 January 2021 9,080 3 View