Why CDOM concentrations are much higher in fresh waters and estuaries than in the open ocean?

CDOM is the colored dissolved organic matter. What makes the fresh water higher in CDOM concentrations than the ocean?

05 June 2019 128 4 View

Any brief and concise explanation of the relationship of Dirac, Kronecker delta, and Heaviside step function?

03 April 2017 9,984 7 View

Is the saturation constant for ammonium in the ASM3 model meant for ammonium-N or both ammonia+ammonium N ?

The half-saturation constant of ammonium in Activated sludge model #3 is given as ammonium, is it for ammonium only or both NH4 +NH3?

01 February 2017 1,441 0 View

Is the activation energy that is calculated from the observations of the maximum growth rate of microorganisms remains constant?

08 September 2016 2,567 1 View

Why is the yield (cell production/ammonium consumption) higher in the Annamox than in nitrification?

Both Annamox bacteria and nitrifiers are slow growers and they both grow on ammonium as their energy source, nitrification is aerobic and annamox is anaerobic , shouldn't the yield in...

10 November 2015 5,353 2 View

What is the reason for adding thiosulphate to a medium containing aerobic denitrifiers like T. Pantotropha?

07 August 2015 7,740 4 View

Why nitrogen fixation and denitrification are non-reversible reactions whereas nitrification is a reversible reaction?

05 June 2015 7,965 2 View

Why anammox and nitrification need additional electrons for the ammonium reaction?

These two processes are involved in the nitrogen cycle. I wonder why these two pathways need additional electrons !

01 February 2015 4,374 3 View

Can we represent a non-periodic function by a Fourier series?

01 February 2015 3,791 15 View

Can we consider only the kinetics of the nitrite oxidizing bacteria when modelling nitrification pathway?

Since the nitrite produced during the partial nitrification is virtually immediately further nitrified to nitrate. And the rate of conversion of ammonia to nitrite by ammonia oxidizing bacteria is...

01 February 2015 8,124 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

How to calculate Ligand-active site distance in a ligand-protein complex from MD simulation?

I have run a MD simulation of a ligand-protein complex in GROMACS using CHARMM forcefield. Reviewer has asked me to calculate Ligand-activesite distance and binding free energy of ligand with...

27 February 2021 4,703 1 View

Does RNAiMAX transfection reagent work in serum free medium?

I diluted siRNA and RNAiMAX in opti-MEM and added to the cells which they were in the growth medium. Is it a right way? or should I culture cells in the opti-MEM medium for a while and not in...

26 February 2021 10,041 3 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

How do I transfect a large plasmid into PC12 cells with nerve growth factor (NGF) receptor?

I have a large 16 kb plasmid, which I need to transfect into PC12 cells. Lipofectamin 2000 didn't work and with GFP alone the transfection rate is very low. I also tried the neon invitrogen...

25 February 2021 6,635 5 View

How to model Supercritical water gasification (SCWG) process in Homer software?

Hi everyone How to model Supercritical water gasification (SCWG) process in Homer software?

25 February 2021 4,075 1 View

Steps to calculate activation energy by coats & redfern method?

I'm a chemistry student and I'm researching the kinetic degradation of mixed plastic waste. I'm having trouble calculating the activation energy by the coats & Redfern method. The data that...

24 February 2021 974 1 View

Is it possible to define biogas as a fuel in the reformer process(scwg) in Homer software?

Hi every one Is it possible to define biogas as a fuel in the reformer process(scwg) in Homer software? Biogas fuel is not available in the options thanks

23 February 2021 6,518 3 View