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357 results on '"Bashir Tariq"'

4. Optimum Drafting Conditions Of Polyester And Viscose Blend Yarns

Author

Hatamvand Mohammad, Mirjalili Seyed Abbas, Fattahi Saeid, Bashir Tariq, and Skrifvars Mikael

Subjects
optimum conditions, total draft, break draft, ring spinning, yarn quality, Textile bleaching, dyeing, printing, etc., TP890-933
Abstract

In this study, we used an experimental design to investigate the influence of the total draft, break draft, distance between the aprons (Clips) and production roller pressure on yarn quality in order to obtain optimum drafting conditions for polyester and viscose (PES/CV) blend yarns in ring spinning frame. We used PES fibers (1.4 dtex × 38 mm long) and CV fibers (1.6 dtex × 38 mm long) to spin a 20 Tex blend yarn of PES (70%)/CV (30%) blend ratio. When the break draft, adjustment of distance between of aprons and roller pressure is not reasonable, controlling and leading of the fibers is not sufficient for proper orientation of the fibers in the yarn structure to produce a high quality yarn. Experimental results and statistical analysis show that the best yarn quality will be obtained under drafting conditions total draft of 38, 1.2 break draft, 2.8 mm distance between of aprons and maximum pressure of the production top roller (18daN).

Published
2017
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32. Textile Actuators Comprising Reduced Graphene Oxide as the Current Collector.

Author

Dutta, Sujan, Mehraeen, Shayan, Martinez, Jose G., Bashir, Tariq, Persson, Nils‐Krister, and Jager, Edwin W. H.

Subjects
GRAPHENE oxide, CARBON-based materials, ACTUATORS, WEARABLE technology, YARN, ELECTROTEXTILES, DISPLACEMENT (Mechanics)
Abstract

Electronic textiles (E‐textiles) are made using various materials including carbon nanotubes, graphene, and graphene oxide. Among the materials here, e‐textiles are fabricated with reduced graphene oxide (rGO) coating on commercial textiles. rGO‐based yarns are prepared for e‐textiles by a simple dip coating method with subsequent non‐toxic reduction. To enhance the conductivity, the rGO yarns are coated with poly(3,4‐ethylene dioxythiophene): poly(styrenesulfonic acid) (PEDOT) followed by electrochemical polymerization of polypyrrole (PPy) as the electromechanically active layer, resulting in textile actuators. The rGO‐based yarn actuators are characterized in terms of both isotonic displacement and isometric developed forces, as well as electron microscopy and resistance measurements. Furthermore, it is demonstrated that both viscose rotor spun (VR) and viscose multifilament (VM) yarns can be used for yarn actuators. The resulting VM‐based yarn actuators exhibit high strain (0.58%) in NaDBS electrolytes. These conducting yarns can also be integrated into textiles and fabrics of various forms to create smart e‐textiles and wearable devices. [ABSTRACT FROM AUTHOR]

Published
2024
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38. Pheromone communication and host-finding behaviour of Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae)

Author

Bashir, Tariq, Hodges, Richard, and Hall, David

Subjects
590, QL Zoology, SF Animal culture
Abstract

The lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae) is a destructive pest of stored grain. Males produce a pheromone, with two components Dominicalure-1 (D 1) and Dominicalure-2 (D2), which is attractive to both sexes. However, little is known about the pheromone biology of R. dominica. This thesis presents new studies that used behavioural bioassay and pheromone entrainment separately, and in tandem, to elucidate aspects of host finding behaviour, pheromone communication system and interactions between these two. The role of host volatiles in primary host selection was tested for several different commodities. For the first time it was shown that R. dominica adults are unable to determine the suitability of a host from its volatiles alone. Further studies on the responses of beetles reared on two different hosts demonstrated that rearing medium does not affect beetle response to a host. The attractiveness of host grains, to both males and females, was increased when infested by male R. dominica. This affect was stronger for females. The mixture of host volatiles and aggregation pheromone was more attractive to both sexes than either of these alone. Individual pheromone outputs of males varied considerably in the absolute quantities of pheromone components D 1 and D2 but the ratio of the two in the blend varied little. Pheromone production was found to rise in the period 16.00h to 20.00h. The actual output of pheromone was positively correlated with body size and extent of feeding/boring. When present with other males, R. dominica released smaller amounts of pheromone. However, when present in an unsuitable host or with females the pheromone signal was modified by a reduction in both the amount of pheromone released and proportion of Dl in the blend. Responding beetles found modified signals less attractive than 'normal' signals. Attempts were made to determine which characteristics of the signal were correlated with the observed responses. The significance of these findings in relation to biology of R. dominica, possible practical implications and avenues for future research are discussed.

Published
2000

44. Textile Actuators Comprising Reduced Graphene Oxide as the Current Collector

Author

Dutta, Sujan, Mehraeen, Shayan, Martinez, Jose G., Bashir, Tariq, Persson, Nils-Krister, Jager, Edwin W. H., Dutta, Sujan, Mehraeen, Shayan, Martinez, Jose G., Bashir, Tariq, Persson, Nils-Krister, and Jager, Edwin W. H.

Abstract

Electronic textiles (E-textiles) are made using various materials including carbon nanotubes, graphene, and graphene oxide. Among the materials here, e-textiles are fabricated with reduced graphene oxide (rGO) coating on commercial textiles. rGO-based yarns are prepared for e-textiles by a simple dip coating method with subsequent non-toxic reduction. To enhance the conductivity, the rGO yarns are coated with poly(3,4-ethylene dioxythiophene): poly(styrenesulfonic acid) (PEDOT) followed by electrochemical polymerization of polypyrrole (PPy) as the electromechanically active layer, resulting in textile actuators. The rGO-based yarn actuators are characterized in terms of both isotonic displacement and isometric developed forces, as well as electron microscopy and resistance measurements. Furthermore, it is demonstrated that both viscose rotor spun (VR) and viscose multifilament (VM) yarns can be used for yarn actuators. The resulting VM-based yarn actuators exhibit high strain (0.58%) in NaDBS electrolytes. These conducting yarns can also be integrated into textiles and fabrics of various forms to create smart e-textiles and wearable devices.

Published
2023
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