Mass transfer

This paper presents experimental and numerical investigations to assess the relative fire structural resistance of thermo-mechanically compressed (or densified) spruce wood. The simulated thermal profiles, the mass loss as well as the charring depths were compared to the experimented results showing a fairly good agreement.

5p vibecca 01-10-2024 0 0   Download

The primary objective of this research is to study the effect of solids concentration and active particle mass fraction on mass transfer in a solid-liquid (dissolution) system and determine the optimum solids volume fraction and operating conditions that will help to achieve higher mass transfer efficiency at higher solids concentration than hitherto used (> 5% v/v).

91p runthenight07 01-03-2023 6 3   Download

The modeling and numerical simulation of mass transport in porous media is discussed in this work by using the so-called pore size distribution for computing transport properties. The pore-size distribution is a property of the pore structure of a porous medium. This can be used to estimate the different transport properties, amongst other, the permeability. By starting with a formula for the absolute permeability, the simulation of water and oil transport in reservoirs is considered by solving mass conservation equations with the help of the control volume method.

7p abcxyz123_02 03-03-2020 16 2   Download

Nội dung môn học trình bày cơ chế quá trình, phương pháp tiến hành, phương pháp tính toán các quá trình khuếch tán trong một pha cũng như giữa các pha: Hấp thụ, chưng cất, trích ly lỏng – lỏng, sấy, hấp phụ và trao đổi ion, trích ly chất rắn, kết tinh, màng bán thấm. Cấu tạo, nguyên lý hoạt động, ưu nhược điểm và phạm vi sử dụng của các thiết bị truyền khối điển hình (dạng tháp và máy sấy).

5p covid19 02-03-2020 84 4   Download

A heat and mass transfer were two processes which occurred during vacuum frying potato chips. The heat transfer process included the convection of heat from the surface to the product and the conduction of heat into the product.

15p mylienanlen 04-08-2015 82 9   Download

Acryloyl-CoA reductase fromClostridium propionicum catalyses the irreversible NADH-dependent formation of propionyl-CoA from acryloyl-CoA. Purification yielded a heterohexadecameric yellow–greenish enzyme complex [(a2bc)4; molecular mass 600 ± 50 kDa] composed of a propionyl-CoA dehydrogenase (a2,2·40 kDa) and an electron-transferring flavoprotein (ETF; b,38kDa;c, 29 kDa). A flavin content (90% FAD and 10% FMN) of 2.4 mol pera2bcsubcomplex (149 kDa) was determined.

9p tumor12 20-04-2013 39 3   Download

The plastid-encodedpsaJgene encodes a hydrophobic low-molecular-mass subunit of photosystem I (PSI) containing one transmembrane helix. Ho-moplastomic transformants with an inactivatedpsaJgene were devoid of PSI-J protein. The mutant plants were slightly smaller and paler than wild-type because of a 13% reduction in chlorophyll content per leaf area caused by an 20% reduction in PSI.

13p galaxyss3 21-03-2013 43 4   Download

Peptide and protein sequence analysis using a combination of gas-phase ion–ion chemistry and tandem MS is described. Samples are converted to multiply charged ions by ESI and then allowed to react with fluoranthene radical anions in a quadrupole linear ion trap mass spectrometer.

8p media19 05-03-2013 37 2   Download

A Hausdorff measure version of the Duffin-Schaeffer conjecture in metric number theory is introduced and discussed. The general conjecture is established modulo the original conjecture. The key result is a Mass Transference Principle which allows us to transfer Lebesgue measure theoretic statements for lim sup subsets of Rk to Hausdorff measure theoretic statements. In view of this, the Lebesgue theory of lim sup sets is shown to underpin the general Hausdorff theory. This is rather surprising since the latter theory is viewed to be a subtle refinement of the former. ...

23p noel_noel 17-01-2013 48 6   Download

A look on energy, renewable energies, energy storage and synthetic fuels, hybrid architecture, fuel cells, hydrogen as a vector of energy of the future.The Earth resources are quite limited in quantity Many challenges to mankind in 21st century: development, health, water, food, demography, education, energy.In physics, energy (Ancient Greek: ἐνέργεια energeia "activity, operation"[1]) is a quantity that is often understood as the ability a physical system has to produce changes on another physical system.

156p dienquochuy 21-12-2012 82 21   Download

n the 1990s, a technique was developed to transfer proteins from electro-phoresis gels onto poly(vinylidene difluoride) (PVDF) membranes, digest the proteins on the membranes with proteases such as trypsin and analyze the resulting peptides on the membranes directly by mass spectrometry to identify the proteins.

8p cosis54 09-12-2012 45 4   Download

Requires improvements in the whole column: – Sub 2 μm particles Porous for optimum mass transfer New bridged hybrid particle required for pressure tolerance (up to 15000 psi) Sizing technology for narrow particle size distribution – Column hardware New frit technology to retain particles New end fittings for high pressure/low dispersion operation – Packing technology New column packing processes to optimize stability

23p qdung92ct 03-07-2012 62 7   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Mass transfer, clearance and plasma concentration of procalcitonin during continuous venovenous hemofiltration in patients with septic shock and acute oliguric renal failure...

7p coxanh_2 23-10-2011 42 4   Download

The article deals with a research on the design and manufacturing of a dynamic balancing machine, using dynamic load sensors and optical one, for calculating the unbalanced mass in thick rotating part on two choosen correction planes. Dynamic load sensors attached to the bearing supports of the machine help us determine the reaction forces generated by the unbalanced mass of the rotor. These load signals are filtered and digitized at a sampling rate which is synchronous to the rotor via an optical sensors.

6p meoden89nd 19-01-2011 79 37   Download