We are investigating the precipitation of metals at very low concentrations (5 uM). is there a method that can detect the presence of colloidal precipitates.
we have tried turbidity and laser obscuration but no success
thanks
I am a second-year grad student. I am finding it difficult finding time to read literature and write (things like qualifying exam, thesis, grants). I find myself so busy with bench work that I...
01 March 2021 3,325 4 View
I've noticed that when thawing long-frozen samples (3-4 months at -20 C), most of the SARS-CoV-2 virus does not remain intact, but that the surrogate appears to. Has anyone else noticed this?
09 January 2021 4,168 7 View
I am woking with very low concentrations of RNA in an attempt to run a qPCR analysis. Given this, I am going to attempt to synthesize cDNA without diluting my sample, and in two different,...
12 December 2020 3,247 3 View
I am not a botanist but need to estimate the average percent vegetation cover of my study area. I have researched this and found articles that use the "releve" method for determining plot size...
22 September 2020 5,676 6 View
I'm running simulations for a bead-spring polymer networks using LAMMPS. I need my simulations to reach biologically relevant timescales of at least a few milliseconds. However each simulation...
14 September 2020 2,954 1 View
Is there such a thing as convex optimization for large deep learning networks? Is there a way to guarantee convergence? Has anyone looked into this?
06 August 2020 5,384 4 View
I am looking for empirical studies that examine the use of non-traditional grading in higher education. This means NOT using A-F grades during a course (even if, at the conclusion of the course,...
09 June 2020 1,519 6 View
- Ask questions where they are not sure/convinced about a statement/conclusion VS reject a statement/conclusion where they 'think' it is not correct? - Provide suggestions to improve a...
21 May 2020 2,624 7 View
On the side, I doing some research (literature-based) on a particular treatment that may help for COVID-19 symptoms but I need someone with a stronger medical knowledge base with expertise in...
29 April 2020 8,098 11 View
Hi , Im wondering does anyone know of any papers detailing the effects to training intensity of small sided games when the group is of mixed performance levels i.e( professional& semi...
18 December 2019 6,495 1 View
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
Hello, I hope you have a good time. I work on a research project about temperature indices. Due to the high number of indices, I only work on tables and maps on an annual time scale. In other...
19 February 2021 9,742 2 View
Hi Dear All, I prepared the extract of fish larvae whole body with PBS. Then protein concentration of the whole-body extraction samples determined by the Folin-Ceiocalteu-Phenol method (Lowry...
17 February 2021 1,971 3 View
I am using the ATP Assay Kit (Colorimetric/Fluorometric) (ab83355) for measuring intracellular ATP from treated cell lines. Although my standards are wokring fine when using the fluorometric...
15 February 2021 3,746 4 View
Hello everyone. I do my anthocyanin test for biscuit incorporated with muntingia calabura fruit powder. I use ultrasonic bath for extraction biscuit powder in metanol HCl 0,1 N (1:10, w/v),...
10 February 2021 2,970 13 View
Hello all, I am looking for ways to compare recharge of groundwater and determine if precipitation has more of an effect on groundwater levels before or after restoration? My data set contains a...
08 February 2021 7,887 5 View
Hello everyone, I am trying to prepare a solution out of PVA(Polyvinyl alcohol)_Glycerol_Wasser . (4% PVA 28-99 and 50% Glycerin) To prepare this solution I first add PVA to 80degree water and...
06 February 2021 2,300 3 View
When I tried to mix a sodium metabisulfite solution with sodium hydroxide solution, the mixture solution quickly became turbid. Before mixing both were clear solutions. Please help explain the...
03 February 2021 8,075 2 View
There has long been a debate among my colleagues about measuring the pH of aqueous colloids. As I see there is no general truth in the matter, so I ask this question below. What is the best and...
31 January 2021 8,203 3 View
I have an alkaline solid waste which contains the following components: SiO2, Al2O3, and CaO according to the XRF analysis (as it gives the results as oxides). However, I know from the XRD that it...
28 January 2021 9,469 3 View