Search

This study deals with effect of various concentrations of chitosan and material parameters on hemostatic properties of the woven and nonwoven dressings. The woven and nonwoven dressings are compared on efficacy on hemostasis. In addition to the studies on bio-polymer and minerals, 1% and 2% of chitosan particle dissolved solution were applied in both plain gauze and spunlace fabrics of cotton and viscose. The hemostatic efficacy and wound dressing suitability were analyzed and based on the results, the 2% chitosan viscose spunlace material was chosen due to its best performance for developing secondary layer for composite wound dressing.

Knot configurations serve as the foundation for postoperative tissue repair. Loosening surgical knots during or after tying might lead to an unsuccessful suture and compromise the outcome. This investigation was car­ried out to study the mechanical properties of knotted silk sutures that are made from braided structures with three different diameters. A maximum tensile strength (33.24 N) and minimum breaking elongation (15%) of dry suture, maximum tensile strength (22.6 N) and minimum breaking elongation (13.6%) of wet suture were achieved with five throws and a diameter of 0.3 mm with surgeon’s square knot.

Abstract Jute hairy caterpillar, Spilosoma (=Spilarctia) obliqua (Walker) (Arctiidae: Lepidoptera), is an irregular and polyphagous insect pest that occurs all over India. A severe natural viral epizootic was observed in the field population of S. obliqua in jute. The virus was characterized as Spilosoma obliqua nucleopolyhedrovirus (SpobNPV NBAIR1) based on morphological, biological, and molecular characterization. Under scanning and transmission electron microscopy (SEM and TEM), the occlusion bodies (OBs) of SpobNPV NBAIR1 appeared as both tetrahedral and triangular with the size ranged from 1.04-1.72 μm. The results on the bioassay studies revealed that the lowest LC50 value of 2.93 OBs/mm2 by leaf disc bioassay against the second instar S. obliqua showed its high virulence. The identity of SpobNPV was further confirmed by the amplification of polyhedrin gene (NCBI GenBank accession no. MK288145). Eleven species of lepidopteran insects, viz., Spodoptera litura, S. exigua, S. frugiperda, Helicoverpa armigera, Plutella xylostella, Amsacta albistriga, Maruca vitrata, Trichoplusia ni, Pieris brassicae, Agrotis ipsilon, and Bombyx mori, were not susceptible to the infection with SpobNPV NBAIR1. Field experiments on jute crop revealed 68.92, 78.59, and 93.16% reduction in larval population of S. obliqua at 3, 4, and 7 days post spray of SpobNPV NBAIR1 (1.5 × 1012 OBs/ha at 2 ml/l), respectively. The present study is a renewed effort in the management of S. obliqua by the new strain of SpobNPV NBAIR1.

The Peristaltic transport of a viscous fluid in a channel with suction and injection is investigated in the present work. The mathematical modeling has been carried out under long wavelength and low Reynolds number approximation. The analytical solution for velocity field pressure gradient, frictional force and stream function in the wave frame of reference is obtained. The pressure rise and frictional force over one wavelength are obtained. The effect of different parameters on pumping characteristics and frictional forces is discussed graphically. It is observed that pressure rise decreases with increasing permeability parameter and increases with increasing amplitude. It is also observed that for various values of suction parameter k, the pumping curves coincide at a point in the first quadrant due to the suction or injection in the channel. The frictional forces illustrate the opposite behavior compared to pressure rise. The trapping phenomenon for different parameters is presented graphically. Keywords: Peristaltic transport, Suction and injection, Permeability parameter, Channel

An increase in demand for natural fiber has created a good opportunity for the – new emerging fiber like bhindi, the ‘fiber from waste plant,’ into the production of value-added textiles and in different applications. This paper envisages a customized blending process of bhindi and jute fibers for developing durable blended yarns, fabrics, and suitable home textiles products; additionally, the effect of blending in terms of physical and esthetic properties of fabric has been investigated. Five types of yarns (100% bhindi, 75:25 bhindi/Jute, 50:50 bhindi/jute, 25:75 bhindi/jute, and 100% jute) have been prepared under identical processing condition and subsequently, blended fabrics are developed. Further based on the survey results the suitable home textiles products are developed. Effects of jute fiber blending on physical and esthetic properties of bhindi/jute-blended fabrics have been examined and subsequently, comparative analysis with 100% bhindi (control) fabric has been carried out. It was found that bhindi:Jute-blended fabrics have increased in strength and flexible property and have an increase in air permeability and absorbency property. Different products were developed from five different fabrics and the majority of respondents found the products as suitable for different home textiles uses.

This paper describes the application of Musa acuminata leaf methanol extract on cellulose fabrics. Musa acuminata is a banana species. It is a popular edible fruit consumed worldwide. Musa acuminata leaf methanol extract was prepared, and Fourier Transform Infrared Spectroscopy was performed to analyze the extracted solution using 0.1% NaOH. The methanol extract in three different concentrations, viz., 3%, 5%, and 7%, was applied on cotton fabrics using padding mangle at room temperature, 40°C, and 50°C, respectively. After application of the methanol extract, antibacterial property of the fabric was tested both qualitatively by a zone of inhibition (AATCC-147) and quantitatively by reduction of bacteria evaluated in percent (AATCC-100). Presence of gram-positive Staphylococcus aureus and gram-negative Escherichia coli bacteria were studied following the AATCC standards. The results reveal that the methanol extract from Musa acuminata leaf, an economic resource, can be applied to medical textile fabrics to impart antibacterial action and UV protection.