Lubrication

In this thesis, the rolling contact wear of 52100 bearing steel and Over-aged Magnesia-Partially-Stabilised Zirconia (OA-Mg-PSZ) ceramic are examined using a newly developed rolling contact wear test rig. The new wear test rig simulates the system geometry of an un-lubricated hybrid (ceramic and steel) ball bearing. The new wear test rig is versatile in that it allows low cost samples to be utilised resulting in a larger number of samples that can be tested.

165p runthenight05 01-03-2023 8 3   Download

This study applied diesel oil, and oil from two non-edible plant seeds which are Hura crepitans and Calophyllum inophyllum. These non-edible oils were extracted from their seeds using the soxhlet extractor and used in the oil-in-water emulsion mud.

16p lucastanguyen 01-06-2020 13 1   Download

Nhiều n-ớc trên thế giới (Mỹ, Trung Quốc, Nhật Bản .) đã nghiên cứu, sản xuất maltodextrin từ tinh bột sắn và ứng dụng trong nhiều ngành công nghiệp nh-: Thực phẩm, d-ợc phẩm, dệt may, sơn, giấy. Maltodextrin có đặc tính quý giá của chất mang (cariers), chất dính (binderers), chất độn, chất nhồi (fillers), chất bôi trơn (lubricants), chất rã (disintegrants), chất tạo khối l-ợng (bulkers) . nên

137p mylan23 17-04-2013 212 44   Download

The velocity at which radiation travels (or propagates) through a medium is dependent on the medium itself When radiation travels through a medium and does not undergo a frequency change, it cannot be undergoing a permanent energy transfer However, radiation can still interact with the medium – Radiation, an EM field, polarizes the electron clouds of atoms in the medium – Polarization is a temporary deformation of the electron clouds

14p qdung92ct 03-07-2012 72 5   Download

 IUPAC Definition: chromatography is a physical method of separation in which the components to be separated are distributed between two phases, one of which is stationary while the other moves in a definite direction  Stationary phase (SP): common name for the column packing material in any type of chromatography  Mobile phase (MP): liquid media that continuously flows through the column and carries the analytes  Analyte: the chemical species being investigated (detected and quantitatively measured) by an analytical method...

19p qdung92ct 03-07-2012 79 10   Download

 Matched against a wide range of spectroscopic and chromatographic techniques, the techniques of electroanalytical chemistry find an important role for several reasons: – Electroanalytical methods are often specific for a particular oxidation state of an element – Electrochemical instrumentation is relatively inexpensive and can be miniaturized – Electroanalytical methods provide information about activities (rather than concentration)

19p qdung92ct 03-07-2012 76 5   Download

 UV-Visible spectra can be interpreted to help determine molecular structure, but this is presently confined to the analysis of electron behavior in known compounds.  Information from other techniques (NMR, MS, IR) is usually far more useful for structural analysis  However, UV-Vis evidence should not be ignored!

18p qdung92ct 03-07-2012 58 4   Download

Aldehydes and Ketones – Form acetals and ketals respectively with normal methanol-containing reagents – Water formed in this reaction will then be titrated to give erroneously high water results – With aldehydes a second side reaction can take place, consuming water, which can lead to sample water content being underestimated – Replacing methanol with another solvent can solve the difficulties (commercial reagents are widely available)

14p qdung92ct 03-07-2012 73 6   Download

VACUUM DISTILLATION TOWER In order to further distill the residuum from the atmospheric tower at higher temperatures, reduced pressure is required to prevent thermal cracking. The process takes place in one vacuum distillation tower. The principles of vacuum distillation resemble those of fractional distillation and, except that larger-diameter columns are used to maintain comparable vapor velocities at the reduced pressures, the equipment is also similar.

6p vitconsieuquay 19-08-2011 303 141   Download