How is phosphorus liberated in calcareous soil..?

Phosphorous is one of the elements that plants need, but it is fixed in calcareous soils

05 January 2021 2,920 6 View

Dose the thinner affected on the concrete when added it?

i want to uses it in concrete

27 December 2018 3,158 2 View

For a given temperature how can I know the time needed for a PCM to melt completely?

I want to know the relation between temperature heat conductivity and time for a pcm to melt completely?

03 April 2016 1,966 3 View

Can any one afford me reliable resources or papers about using air as an insulator?

03 April 2016 342 3 View

Where can I find papers about underfloor heating by PCM??

I'm trying to acquire as much as possible information about underfloor heating by PCM, but I haven't found much papers about this topic exactly please I appreciate any help by a link. Thanks in...

02 March 2016 5,944 4 View

Type of metal to use in pipe exchanging heat with diesel exhaust gas?

I want to design a heat exchanger by means of a 2 inch pipe passing inside 65cm diameter diesel exhaust. I want to know the best type of metal that endures the temperatures and the gasses of the...

01 January 1970 7,154 6 View

The importance of micromorphological studies of soils

Soil microphology is all the efforts that are made to study soils or soil samples, but in a microscopic or microscopic field. In the study, regular and polarized microscopes

01 January 1970 230 4 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View

Exit velocity of natural gas from pressurized tank?

Hi Guys. I'm a mechanical engineer and have a bit trouble, would be very glad if you could help me with my questions. I have a pressurized tank which contains Natural Gas at 200 Bar and 293...

26 February 2021 6,253 3 View

Gas sensor response and recovery time independant of flow rate and chamber volume?

I am trying to obtain the response and recovery times for my gas sensor device. It appears the the response/recovery times are primarily dependant on the flow rate of the gas I inject into the...

26 February 2021 1,511 3 View

Why do a weight decrease for thermal degradation in nitrogen gas condition?

Hi all The question is related to TGA(Thermogravimetric analysis). Thermal degradation easily understood but why do samples weight decrease? altough just binding is broked, the weight of...

26 February 2021 1,100 5 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

Aspen Plus Error: Unknown or undefined bead number?

Hello, in my Aspen Plus Simulation (see attachment) there are two heat exchangers. One HEX1 (oil+gas) ist fed by hot gas which ist coming out of a burner. The other HEX2 (gas+gas) shall work as a...

14 February 2021 8,096 2 View

NVT or NPT is preferable for gas adsorption simulation ?

Hi there, In order to perform molecule dynamic simulation on gas adsorption on substrate materials, NVT or NPT ensemble is preferable ? Thanks!

08 February 2021 173 1 View

How can I convert permeability unit from barrer to m^2 for using COMSOL MultiPhysics?

I am looking for gas permeability of PDMS for simulation in COMSOL MultiPhysics and using creeping flow , fluid and matrix properties. The permeability unit in COMSOL is m^2 whereas I have the...

08 February 2021 4,305 2 View

Any reference paper with detailing on how to hybradize Q-Learning algorithm with Genetic Algorithm, especially for a variable optimization problem?

I am planning to hybradize Q-Learning algorthm with Genetic algorithm at the population initialization stage, crossover stage and mutation stage. The problem under consideration is a...

07 February 2021 3,123 8 View