When analysis VOCs in solid waste or water, the technique of equilibrium headspace analysis was use (as EPA Method 5021A) but not include guidelines for calculation. Pls, how to calculate them?
Not my field but I'd expect that you would need to spike the matrices to calibrate the headspace measurements
Dear colleague, I need help with a GIS issue. The polygons have been separated by roads, leaving space between them (as shown in the attached figure). I'm looking for an automated solution in...
04 July 2024 6,752 3 View
I utilized a Bayesian state space model to analyze the data. The 95% confidence interval, which ranges from 0.0 to 1.2, prompts the question: Is the regression coefficient significantly different...
01 July 2024 9,575 2 View
I need some technology applying in cvt gearbox due to improve the effective of this type
11 April 2024 9,582 0 View
Hi everyone, I am currently working on human mtDNA and try to construct phylotree based on my samples. I noticed that a tool called mtPhyl (https://sites.google.com/site/mtphyl/) was used in many...
31 March 2024 3,630 3 View
Help me fix error "modulenotfounderror: no module named 'keras'". Python: 3.11.7; Tensorflow: 2.15.0; Keras: 2.15.0. Update both of them on the latest version but cannot work.
23 February 2024 3,688 4 View
Dear all, I created a profile a long time ago with 2 publications included in that profile. Now I have a new profile and would like to merge two profiles into one, or at least I can include those...
17 February 2024 5,904 1 View
Compared to America's traditional partners such as Korea and Japan or emerging countries such as Indonesia and Malaysia, does Vietnam have any advantages or disadvantages? Compared to Trump or...
23 December 2023 8,839 0 View
I am working on CO2 and nitrite (NO2-) co-electrochemical reduction to produce urea. I've tried several catalysts (some similar to those from papers), but none of them is capable of producing...
16 December 2023 3,472 1 View
Dear community, Is there any way to convert the .chk file to .fchk file WITHOUT using formchk tool of Gaussian software that strictly demand the compatibility of the Gaussian version?
19 November 2023 1,822 7 View
How to identify the correct size of a large DNA band (>20kb) after being digested by a unique restriction enzyme? I have recently digested a large plasmid with a size of 20,208 bp by XhoI, a...
07 September 2023 8,942 4 View
Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...
07 August 2024 1,937 1 View
A fungal strain was treated with nanoparticles. We want to do an environmental SEM analysis. So could anyone share your views on preparing the sample? Thank you.
07 August 2024 5,307 1 View
Reference dose and Maximum acceptable concentrations HMs
03 August 2024 8,230 4 View
I am using a Bruker 600M solid-state NMR spectrometer with a Micro 2.5 microimaging system. The test sample is a tube of 1M LiCl aqueous solution, and the nucleus detected is 1H. I am trying to...
01 August 2024 9,227 1 View
AI-driven technologies offer previously unheard-of capabilities to process enormous volumes of data, extract insightful knowledge and improve predictive models, according to the UN’s World...
31 July 2024 9,733 3 View
Dear all: I am modifying Bismuth Tungstate with Hematite (Fe2O3), so I would like to know about how much Iron(+3) can form a solid solution in a Bismuth Oxide matrix. Best wishes Marco
29 July 2024 2,163 1 View
For example, if low-density polyethylene (LDPE) is equilibrated with PCB contaminated marine and freshwater sediments, can LDPE-lipid partition coefficients be used to obtain equilibrium...
28 July 2024 263 1 View
How much volume of siRNA can I add to 2.5 mL of liposomes with a total lipid concentration of 10 mg/mL?
27 July 2024 6,920 1 View
Why microbes are used in environmental engineering and role of microbes in reducing environmental pollution and improving environmental quality?
25 July 2024 5,192 5 View
I am looking for a lipid waste disposal method, keeping in mind the environmental, health and safety aspect of lipid waste. Could someone please provide guidelines or the lowest acceptable...
25 July 2024 637 5 View