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Based on the results of this study, it is evident that the retting process adversely affects the physicochemical properties of water and therefore water treatment is necessary before the water is being discharged downstream into ponds, lakes and rivers.
Crushing is a form of pre-treatment prior to the retting process which can be carried out either manually or by mechanical means.
Manual crushing involves the use of hammers whereas mechanical crushing involves the use of decorticators in order to crack the bark of the plant, which will provide pathways for microbes to accelerate the retting process [12].
Since most retting processes in the agriculture industry are not equipped with retting wastewater treatment systems, it is therefore crucial to examine the effect of pre-treatment on the physicochemical properties of retting water.
Paul: Application of the Condition Factor in the Production of African Sharptooth Catfish Clarias Gariepinus.

There are also other factors that affect the welding process.
This tool measures the profile of the surface to be filled and can be useful to verify the quality of a mechanical part.
Finally, the profiles have been normalised in both x and z dimensions so that the comparison field is not affected by the position of the profile in the measurement space of the profilometer , as shown in Fig. 5c.
By using AI techniques to classify different types of layer profile and predict their properties, the algorithm could potentially improve the efficiency and precision of the DED process.
Martikainen, «Robotic arc welding sensors and programming in industrial applications», International Journal of Mechanical and Materials Engineering, vol. 10, n.o 1, p. 13, jul. 2015, doi: 10.1186/s40712-015-0042-y

In the first phase, the main properties of the bridge were designed by using conventional methods of civil engineering.
However, in the real environment a multiplicity of factors affect the system.
It is not possible to foresee all the factors that can have an effect.
Safety as such cannot be used as an input parameter as it depends on numerous factors.
It is mainly economic and structural factors that are input into the optimization.

This is due to the poor cold forming properties due to the strong textures that develop during thermomechanical treatment.
Both parameters affect directly the position in which the solidification takes place.
After an additional ECAP pass, there is a markedly difference in the mechanical behavior along the two directions measured in this work.
Mechanical properties at room temperature of the sheets processed by ESR, DSR and ECAP Process s0,2 [MPa] UTS [MPa] eu[%] ef [%] r-value ɛ=10% [-] RD TD RD TD RD TD RD TD RD TD ESR 170 190 266 267 13 12 15 13 1,5 1,9 DSR 183 206 261 262 15 10 21 10 1,5 2,1 DSR+ ECAP 200°C 143 203 263 269 19 14 28 15 0,6 1,6 Fig. 4 presents the deformed samples of the formability tests.
Acknowledgments The results in this study were performed on the joint research project HO 2165/47-1 and LE 1395/6-1 “Texture optimization of Mg alloy sheets for the improvement of mechanical and forming properties”, which is sponsored by the Deutsche Forschungsgemeinschaft (DFG).

A Repair Technology of Anti-cavitation and Anti-abrasion on Water Pump Impeller Haibin Yao 1, a, Xiang Zhang﹡1,2,b, Wenming You1,c, Yongsheng Li 3,d and Luming Mao 3,e 1 School of Mechanical Engineering, Yangzhou Polytechnic College, 225002, China 2 School of Metallurgical Engineering, University of Science and Technology Beijing, 10083, China 3Yangzhou Changjiang Water Pump co., LTD, China ayzyaohaibin@163.com, bbg4ubq@163.com, cjxxianwengyou@163.com,d,eyzcjsb@sina.com Keywords: Water pump impeller; anti-cavitation; anti-abrasion; repair technology Abstract.
Appropriate formula and treatment process are required in the application process, otherwise, it will affect the surface's treatment effect, resulting in the stripping of coating.
As the overall impeller has no damage, only some areas have cavitation perforation and the surface has rust and abrasion, in addition to the factors of time and cost, the composite repair of repair welding method and polymer coating method is adopted.
During the overlaying process, only when the temperature of the front end's welding line and the heat affected zone drops below 50℃ can the welding of each period begin.
After all the above work has been completed, it can be put into use when the material is completely cured. 2-4 hours after the natural curing of metal repair materials, they could be heated (light, hot air, fire roast) to about 100 ℃ and maintained for 24 hours if time permits, in order to improve its mechanical properties.

Introduction Nickel-based single crystal (SC) superalloys have been widely used for turbine blades in hot sections of aero-jet engines due to their superior mechanical behavior at high temperature.
Taking all these factors into consideration, malfunctions occur easily in the rabbet.
The movement of dislocations is strongly affected by the direction of applied load[7].
The mechanical properties and constitutive model of nickel-based single crystal superalloys have been extensively studied, and the elastic-plastic model based on phenomenology and crystallographic plastic theory has been proposed.
The crystallographic slip theory is mostly used, for its preferable description of mechanical properties of single crystal superalloys[10].

Bio-based (such as bamboo particles) and earth materials have shown interesting potential for improving some thermal properties of covering mortars.
In addition, it is important to provide significant improvements in the thermal performance of the building depending on its physical properties (PBMC, 2018).
For this, we use the GWPbio factor (using a 100-year time horizon) developed by Guest et al. (2012).
A GWPbio factor of 0.98 is found by Guest et al. (2012).
· The number of replacements of mortars severely affects the final results.

Introduction Generally, polyethersulfone (PES) is one of the polymeric materials, which has high mechanical, thermal and chemical resistances, easy processing and environmental endurance.
However, its poor antifouling properties affect its application and usage life [1-2].
Titanium dioxide (TiO2) has been focus of numerous studies in recent years due to its photocatalytic and superhydrophilicity effects, stable chemical property, innocuity and low cost.
This is due to the hydrophilicity and photocatalytic properties of TiO2 nanoparticles radiated on membrane surface by UV light.
This is due to presence of OH bonds in the membrane structure is the main factor for arrangement TiO2 nanoparticles on the membrane surface.

The physical properties of ZnO:Al films deposited by sputtering were affected from the sputtering parameters, such as sputtering power, argon gas pressure, substrate temperature, and target-substrate distance [13-19], However, to the best of our knowledge, there have been no reports on the effect of substrate temperature on the properties of sputtered Al2O3 and ZrO2 co-doped ZnO thin films.
Tai, Electrical and optical properties of Al-doped ZnO thin films by sol–gel process, Appl.
Kassis, Effect of r.f power on the properties of rf magnetron Sputtered ZnO:Al thin films, Mater.Chem.Phys.136(2012) 205–209
Kim, Dependence of the properties of sputter deposited Al-doped ZnO thin films on base pressure, J.
Myoung, Influence of sputtering pressure on morphological, mechanical and electrical properties of Al-doped ZnO films, Solid-State Electron.54(2010) 1447–1450

Even it is washed by hand, wrinkles appear and they affect the aesthetic of the garment.
Roving Because of the properties of the bamboo fiber and eri-silk, under the condition that the Hardhead does not appear during yarn spinning, the twist factor for roving is properly made greater in order to prevent undesired elongation and to reduce roving hairness.
Table.6 The main parameters of drawing No. dry weight/ (g/5m) sliver number total draw ratio rear drawing front roller speed/（m/min） roller spacing/mm roller diameter/mm First 18.25 6 6.41 1.38 210 47/51 40/30/30 Second 17.75 6 6.16 1.35 210 47/51 40/30/30 Table.7 The main technique parameters of roving Dry weight /(g/10m) moisture regain /% total draw ratio back draw ratio spacing/ mm spacing block/ mm twist factor spindle speed/ (r/min) sliver speed/ (r/min) 4.44 7.0 7.99 1.28 8×26×32 5.5 98 850 234 Spinning Because the eri-silk and bamboo fiber are soft and smooth and a great deal of fuzz is produced during spinning, after a number of experiments, we use soft and elastic rubber roller on FA503 spinning frame to widen its axial friction field, even its broadwise friction field, therefore ensure the steady control of the fibers and decrease the friction between traveler and ring.
Conclusions Through the research on the feasibility of blending and spinning the cut and degummed eri-silk and bamboo pulp fiber on the cotton spinning equipment, exploration of the suitable spinning technique parameters and the test of the spun yarn, It show that the produced yarn has good physical properties.
References [1] Xiangfen Gao, Baoqi Zuo.Influence of different degumming method on silk mechanical property [J], Silk,2006,(3):18-20