The Experts below are selected from a list of 4095 Experts worldwide ranked by ideXlab platform

Santanu Dhara - One of the best experts on this subject based on the ideXlab platform.

  • osseointegration assessment of extrusion printed ti6al4v scaffold towards accelerated skeletal defect healing via tissue in growth
    Bioprinting, 2017
    Co-Authors: Pavan Kumar Srivas, Kausik Kapat, Prabhash Dadhich, Joy Dutta, Pallab Datta, Santanu Dhara
    Abstract:

    Abstract 3D printing is an additive manufacturing technique to produce metallic components with controlled pore size, total porosity and pore-connectivity. Selective laser melting (SLM), the most widely used technique to develop such kind of metallic components for bone graft applications, requires a controlled atmosphere for reactive metal powder processing. In this study, a simple extrusion-based 3D printing technique is developed to produce porous Ti6Al4V scaffold under Ambient Environmental Condition to overcome the existing limitation. 3D printed Ti6Al4V scaffold with pore size ~500 µm and total porosity ~58% was achieved. The scaffold exhibited ~13% shrinkage after sintering, resulting in strut diameter ~348 µm with persistent inter-particle voids. The compressive strength and elastic modulus values are 39.58±4.56 MPa and 450±7.21 MPa comparable to cancellous bone mechanical properties. In vitro cytocompatibility assessment of scaffold using mesenchymal stem cells revealed extensive cellular coverage on scaffold surface and differentiation towards bone cell lineage. In vivo studies by scaffold implantation in rabbit femur for four weeks and eight weeks exhibited the scaffold's ability to promote osseointegration and tissue integration through bone in-growth evidenced by micro-CT. Therefore, using this simple and cost-effective technique, bone graft substitute scaffolds could be developed as implant for load bearing applications.

Muliadi Muliadi - One of the best experts on this subject based on the ideXlab platform.

  • ASSESSMENT OF WORKING ENVIRONMENT IN READY-MADE GARMENT INDUSTRIES: A CASE STUDY IN GAZIPUR, BANGLADESH
    2018
    Co-Authors: Mahmuda Binte Latif, Shamim Al Mamun, Muliadi Muliadi
    Abstract:

    The study was conducted to assess the Ambient Environmental Condition (temperature, humidity, noise and illumination) in the SIJI Garments Co. Ltd., Ehsan Garments Ltd. and Silver Composite Textile Mills Ltd. in Gazipur District, Bangladesh from September, 2016 to February, 2017 (during winter season) to know the internal working environment of the garment industries. In the SIJI Garments Co. Ltd., the highest temperature was observed in the cutting section (28.7°C), sewing section (28.9°C) and packaging section (29.2°C) which exceeded the guideline values. The highest noise level was observed in packaging section (86.6 dB). The illumination level in the most densely populated sections of workers such as cutting section (450 lux), sewing section (490 lux) and sample section (488 lux) were found unpleasant for the workers.  In Ehsan Garments Ltd., the highest temperature was observed in sewing section (26.4°C) which exceeded the ASHRAE (American Society of Heating, Refrigerating and Air Conditioning Engineers)standard and the noise level in sewing section (88.4) which exceeded the ECR guidelines. In Silver Composite Textile Mills Ltd. the illumination level was poor in almost all sections specially cutting (466 lux), sewing (565 lux) and finishing (515 lux) sections where maximum number of workforce was employed. The temperature of all sections of three readymade garment industries were optimum to moderately high, humidity level was around optimum level but the noise levels highly exceeded the ECR, 1997. The illumination level was insufficient especially in the cutting and sewing section.The study revealed that congested work area, improper ventilation, building design, excessive noise, poor illumination, dust and no use of personal protective equipment were the major problem faced by the workers in these industries.

Pavan Kumar Srivas - One of the best experts on this subject based on the ideXlab platform.

  • osseointegration assessment of extrusion printed ti6al4v scaffold towards accelerated skeletal defect healing via tissue in growth
    Bioprinting, 2017
    Co-Authors: Pavan Kumar Srivas, Kausik Kapat, Prabhash Dadhich, Joy Dutta, Pallab Datta, Santanu Dhara
    Abstract:

    Abstract 3D printing is an additive manufacturing technique to produce metallic components with controlled pore size, total porosity and pore-connectivity. Selective laser melting (SLM), the most widely used technique to develop such kind of metallic components for bone graft applications, requires a controlled atmosphere for reactive metal powder processing. In this study, a simple extrusion-based 3D printing technique is developed to produce porous Ti6Al4V scaffold under Ambient Environmental Condition to overcome the existing limitation. 3D printed Ti6Al4V scaffold with pore size ~500 µm and total porosity ~58% was achieved. The scaffold exhibited ~13% shrinkage after sintering, resulting in strut diameter ~348 µm with persistent inter-particle voids. The compressive strength and elastic modulus values are 39.58±4.56 MPa and 450±7.21 MPa comparable to cancellous bone mechanical properties. In vitro cytocompatibility assessment of scaffold using mesenchymal stem cells revealed extensive cellular coverage on scaffold surface and differentiation towards bone cell lineage. In vivo studies by scaffold implantation in rabbit femur for four weeks and eight weeks exhibited the scaffold's ability to promote osseointegration and tissue integration through bone in-growth evidenced by micro-CT. Therefore, using this simple and cost-effective technique, bone graft substitute scaffolds could be developed as implant for load bearing applications.

Mahmuda Binte Latif - One of the best experts on this subject based on the ideXlab platform.

  • ASSESSMENT OF WORKING ENVIRONMENT IN READY-MADE GARMENT INDUSTRIES: A CASE STUDY IN GAZIPUR, BANGLADESH
    2018
    Co-Authors: Mahmuda Binte Latif, Shamim Al Mamun, Muliadi Muliadi
    Abstract:

    The study was conducted to assess the Ambient Environmental Condition (temperature, humidity, noise and illumination) in the SIJI Garments Co. Ltd., Ehsan Garments Ltd. and Silver Composite Textile Mills Ltd. in Gazipur District, Bangladesh from September, 2016 to February, 2017 (during winter season) to know the internal working environment of the garment industries. In the SIJI Garments Co. Ltd., the highest temperature was observed in the cutting section (28.7°C), sewing section (28.9°C) and packaging section (29.2°C) which exceeded the guideline values. The highest noise level was observed in packaging section (86.6 dB). The illumination level in the most densely populated sections of workers such as cutting section (450 lux), sewing section (490 lux) and sample section (488 lux) were found unpleasant for the workers.  In Ehsan Garments Ltd., the highest temperature was observed in sewing section (26.4°C) which exceeded the ASHRAE (American Society of Heating, Refrigerating and Air Conditioning Engineers)standard and the noise level in sewing section (88.4) which exceeded the ECR guidelines. In Silver Composite Textile Mills Ltd. the illumination level was poor in almost all sections specially cutting (466 lux), sewing (565 lux) and finishing (515 lux) sections where maximum number of workforce was employed. The temperature of all sections of three readymade garment industries were optimum to moderately high, humidity level was around optimum level but the noise levels highly exceeded the ECR, 1997. The illumination level was insufficient especially in the cutting and sewing section.The study revealed that congested work area, improper ventilation, building design, excessive noise, poor illumination, dust and no use of personal protective equipment were the major problem faced by the workers in these industries.

Kausik Kapat - One of the best experts on this subject based on the ideXlab platform.

  • osseointegration assessment of extrusion printed ti6al4v scaffold towards accelerated skeletal defect healing via tissue in growth
    Bioprinting, 2017
    Co-Authors: Pavan Kumar Srivas, Kausik Kapat, Prabhash Dadhich, Joy Dutta, Pallab Datta, Santanu Dhara
    Abstract:

    Abstract 3D printing is an additive manufacturing technique to produce metallic components with controlled pore size, total porosity and pore-connectivity. Selective laser melting (SLM), the most widely used technique to develop such kind of metallic components for bone graft applications, requires a controlled atmosphere for reactive metal powder processing. In this study, a simple extrusion-based 3D printing technique is developed to produce porous Ti6Al4V scaffold under Ambient Environmental Condition to overcome the existing limitation. 3D printed Ti6Al4V scaffold with pore size ~500 µm and total porosity ~58% was achieved. The scaffold exhibited ~13% shrinkage after sintering, resulting in strut diameter ~348 µm with persistent inter-particle voids. The compressive strength and elastic modulus values are 39.58±4.56 MPa and 450±7.21 MPa comparable to cancellous bone mechanical properties. In vitro cytocompatibility assessment of scaffold using mesenchymal stem cells revealed extensive cellular coverage on scaffold surface and differentiation towards bone cell lineage. In vivo studies by scaffold implantation in rabbit femur for four weeks and eight weeks exhibited the scaffold's ability to promote osseointegration and tissue integration through bone in-growth evidenced by micro-CT. Therefore, using this simple and cost-effective technique, bone graft substitute scaffolds could be developed as implant for load bearing applications.