Abstract: Galvanizing plant waste (zinc dross) containing 27.66% zinc was leached in HCl solutions. Zinc in solution was precipitated as Zn(OH)₂ by adding ammonium hydroxide. The product was characterized by atomic absorption spectroscopy, thermogravimetric analysis, x-ray diffraction analysis, and scanning electron microscopy. X-ray diffraction analysis confirmed that when heated at 500^oC, the product possesses hexagonal zincite structure. Scanning electron microscopy confirmed that the shape of zinc oxide particles was spherical and compares well with the standard product. A maximum of 93.7% zinc contained in the dross could be extracted and converted to zinc oxide having a purity of 98.8%.

Abstract: This paper comparatively studied the effects of time of heatsetting and wet processes on shearing rigidity (G_{1 .}G₂ ) gf/cm. degree, shear hysteresis at 5%, shear angle (2HG₁, 2HG₂) and shear angle at 5% (2HG5₁ and 2HG5₂) of knitted Ingeo™ Poly (lactic) acid and Polyethyleneterepthalate fabrics in warp [G₁] and weft [G₂] directions using the KES-FS system of fabric evaluation. PLA samples of dimension 200 mm x 200 mm were subjected to heatsetting at temperatures of 130°C respectively and increasing times of 15 s, 30 s, 45 s, 60 s, 90 s, 120 s and 240 s using the Werner Mathis infra-red heatsetting equipment and subsequently treated to wet processes including scouring, alkaline reduction clearing, dyeing and softening. The KES Shear tester was used in determining the ease with which knitted PLA and PET fibers slided against each other to ascertain properties such as softness, pliability to stiffness/rigidity and inter yarn stability to mechanical distortion. They samples were measured to a maximum shear angle of ± 8°. Results showed that after subjecting the samples to various wet processes, PET exhibited higher shear rigidity G in both warp (G₁) and weft (G₂) directions with increasing times of heatsetting. Measurements of shear hysteresis at 0.5° shear angle (2HG) and 5° angle (2HG5) in gf/cm showed PLA exhibiting a higher shear hysteresis than PET with increasing times of heatsetting.

Abstract: Angora rabbit is the oldest known breed of rabbit. Its origin is in Anatolia but it is rare in Turkey now. Angora is a keratinous textile material, produced by the long-haired Angora rabbit. The fiber obtained from Angora rabbit is used in textiles. This fiber is one of the luxury fine fibers. It is grown in China, Chile, France, Germany, Argentina, Brazil, India, Korea and Hungary.

Abstract: Angora is a keratinous textile material, produced by the long-haired Angora rabbit. The combination of lightness and high thermal properties of angora fibers makes them exceptional and it is categorized as luxury fiber. In this review article, physical features of this exclusive fiber were given and recent studies on the characteristics of angora fiber were summarized.

Abstract: Angora rabbit fibers are very attractive for the consumers because of its physical and chemical properties. It has been used as a textile good for a long time but the production and consumption rates were low. This makes it popular and a sign of the wealthy. On the other hand the processing of Angora rabbit fibers has to be managed cautiously because of its structure. As a result of this, pretreatment of them has great importance in terms of the saving its original properties. These fibers are clean and no heavy pretreatment is needed. Even so in the need of the pretreatment processes, it is recommended to use the pretreatment methods valid for the wool but in mild conditions. In this review article, information on the pretreatment of Angora rabbit fibers were compiled and recent studies on angora fibers in terms of the issue were summarized.

Abstract: Angora rabbit fibers are exceptionally soft and lustrous fibers. The Angora rabbit is a very old breed of rabbit, believed to have originated in Turkey in the town of Angora. As these fibers are also protein based, dyeing characteristics are similar to wool. All recipes for dyeing sheep wool can be used for angora, too. But angora should be dyed at lower temperatures and it should not be boiled. In this review article, knowledge about the dyeing properties of Angora rabbit fibers are given and recent studies on angora dyeing are summarized.

Abstract: Angora rabbit fiber, a luxury animal hair fiber is obtained from Angora rabbit. It has some distinct properties like warmness, fineness, whiteness and softness; however its utilization in the conventional textile clothing is restricted due to its scale structure and ladder type medulla. Medulla, an air occupied area in the middle of the fiber reduces the flexibility and scales are responsible for reducing inter-fiber cohesion during mechanical processing of hair. Due to these demerits, Angora rabbit hair is generally used to develop some specialty products through traditional hand spinning and hand loom. To utilize this hair with other textile fibers, either physical or chemical methods are used, that increase the value as well as performance of the final products. This paper overviews various novel approaches involved in finishing of angora rabbit hair for improvement of value and performance of products.

Abstract: The Angora rabbit fiber has a smooth texture which makes it difficult to spin. Because of this reason it is usually blended with other fibers such as wool to improve its performance both in processing and fabric wearability. In this study, general knowledge on the yarn and fabric production from angora rabbit fiber and its end-uses is given.

Abstract: Abstract In the present investigation, the corrosion behaviour of 6082-T6 Al alloy plates joined by friction stir welding (FSW) were evaluated. The effects of weld process parameter like welding speeds as well as pin profiles on corrosion behaviour were investigated. The plates of AA6082-T6 were friction stir welded at rotational speed of 1600-1650rpm using three different tool pin profiles like four flute pin, triangular pin and hexagonal pin, with different welding speeds (typically, 50, 62, 68, 70, and 74 mm/min). The corrosion tests of base alloy and welded joints were carried out in 3.5% NaCl solution at a room temperature. Corrosion current and potential were determined using potentiostatic polarization measurements. The pitting potentials of corrosion tested samples at various process parameters clearly indicated a greater corrosion resistance of weld metal than base alloy.

Abstract: This work presents the comparative study of pure clay with that blended with rice husk in Enugu State, Nigeria. This research was carried out to investigate its physical properties, such as; modulus of plasticity, porosity, bulk density, water absorption, making moisture, modulus of rupture, shrinkage and apparent density. In order to ascertain the influence of rice husk on these properties of the clay in the area in question. The results obtained revealed that the blended clay with rice husk and pure clay were fired at furnace to the turn of 900°C, 1000°C, 1100°C and 1200°C respectively. They were then tested for apparent density, porosity, and modulus of rupture and water absorption capacity. The results obtained showed that the maximum service temperature of the blends was presented to be the best under a given temperature. There was also observed decrease in the bulk density, shrinkage with an increase in the plasticity.