The Experts below are selected from a list of 108 Experts worldwide ranked by ideXlab platform

Marcin K Widomski - One of the best experts on this subject based on the ideXlab platform.

  • The influence of partial replacement of hemp shives by expanded perlite on physical properties of hemp-lime composite
    2017
    Co-Authors: Przemysław Brzyski, Marcin K Widomski
    Abstract:

    The use of waste plants in building materials production is consistent with the principles of sustainable development, including waste management, CO2 balance, biodegradability of the material e.g. after building demolition. The porous structure of plant materials determines their usability as the insulation materials. An example of plant applicable in the construction industry is the industrial hemp. The shives are produced from the wooden core of the hemp stem as lightweight insulating Filler in the composite based on lime binder. The discussed hemp-lime composite, due to the presence of lightweight, porous organic aggregates exhibits satisfactory thermal insulation properties and is used as filling and insulation of walls (as well as roofs and floors) in buildings of the wooden frame construction. The irregular shape of shives and their low density causes nonhomogenous compaction of composite and the formation of voids between the randomly arranged shives. In this paper the series of hemp-lime composites were tested. Apart from hemp shives, an additional aggregate – expanded perlite was used as a fine, lightweight, thermal insulating Filler. Application of the additional aggregate was aimed to fill the voids between hemp shives and to investigate its influence on the physical properties of composite: apparent density, total porosity, water absorption and thermal conductivity.The use of waste plants in building materials production is consistent with the principles of sustainable development, including waste management, CO2 balance, biodegradability of the material e.g. after building demolition. The porous structure of plant materials determines their usability as the insulation materials. An example of plant applicable in the construction industry is the industrial hemp. The shives are produced from the wooden core of the hemp stem as lightweight insulating Filler in the composite based on lime binder. The discussed hemp-lime composite, due to the presence of lightweight, porous organic aggregates exhibits satisfactory thermal insulation properties and is used as filling and insulation of walls (as well as roofs and floors) in buildings of the wooden frame construction. The irregular shape of shives and their low density causes nonhomogenous compaction of composite and the formation of voids between the randomly arranged shives. In this paper the series of hemp-lime composit...

  • The influence of partial replacement of hemp shives by expanded perlite on physical properties of hemp-lime composite
    2017
    Co-Authors: Przemysław Brzyski, Marcin K Widomski
    Abstract:

    The use of waste plants in building materials production is consistent with the principles of sustainable development, including waste management, CO2 balance, biodegradability of the material e.g. after building demolition. The porous structure of plant materials determines their usability as the insulation materials. An example of plant applicable in the construction industry is the industrial hemp. The shives are produced from the wooden core of the hemp stem as lightweight insulating Filler in the composite based on lime binder. The discussed hemp-lime composite, due to the presence of lightweight, porous organic aggregates exhibits satisfactory thermal insulation properties and is used as filling and insulation of walls (as well as roofs and floors) in buildings of the wooden frame construction. The irregular shape of shives and their low density causes nonhomogenous compaction of composite and the formation of voids between the randomly arranged shives. In this paper the series of hemp-lime composites were tested. Apart from hemp shives, an additional aggregate – expanded perlite was used as a fine, lightweight, thermal insulating Filler. Application of the additional aggregate was aimed to fill the voids between hemp shives and to investigate its influence on the physical properties of composite: apparent density, total porosity, water absorption and thermal conductivity.

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

  • The Effect of Chemodenervation by Botulinum Neurotoxin on the Degradation of Hyaluronic Acid Fillers: An Experimental Study.
    Plastic and reconstructive surgery, 2016
    Co-Authors: Ismail Kucuker, İbrahim Alper Aksakal, Ahmet Veysel Polat, Murat Sinan Engin, Engin Yosma, Ahmet Demir
    Abstract:

    BACKGROUND Early degradation is a common complaint for hyaluronic acid Fillers. Although the combination of hyaluronic acid Fillers with botulinum neurotoxin type A presented improved clinical results, objective measurement of hyaluronic acid volumes has not been previously assessed. METHODS In this study, the authors have split the calvaria of the rabbit to mimic the glabellar region in humans. In this model, the authors applied hyaluronic acid alone to one side and hyaluronic acid combined with botulinum neurotoxin type A to the contralateral side. Two days and 3 months after the Filler injection, magnetic resonance imaging was performed to assess the Filler volumes. RESULTS Average initial volume of Filler only and Filler combined with botulinum neurotoxin type A was 0.61 cm on both sides, and there was no difference between initial volumes of the two sides (p = 0.735). At the end of 3 months, average degraded volumes of Filler-only and Filler combined with botulinum neurotoxin sides were 0.33 cm and 0.19 cm, respectively, and the degradation difference was significant between the two groups (p = 0.001). End volumes for the Filler-only and Filler combined with botulinum neurotoxin sides were 0.28 cm and 0.42 cm, respectively, and end volumes between two sides were also statistically significant (p < 0.001). CONCLUSION This study showed that hyaluronic acid Filler Application in combination with botulinum neurotoxin type A significantly decreases the degradation process and increases the remaining volume of the hyaluronic acid Fillers at the end of the paralyzed period.

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

  • The influence of partial replacement of hemp shives by expanded perlite on physical properties of hemp-lime composite
    2017
    Co-Authors: Przemysław Brzyski, Marcin K Widomski
    Abstract:

    The use of waste plants in building materials production is consistent with the principles of sustainable development, including waste management, CO2 balance, biodegradability of the material e.g. after building demolition. The porous structure of plant materials determines their usability as the insulation materials. An example of plant applicable in the construction industry is the industrial hemp. The shives are produced from the wooden core of the hemp stem as lightweight insulating Filler in the composite based on lime binder. The discussed hemp-lime composite, due to the presence of lightweight, porous organic aggregates exhibits satisfactory thermal insulation properties and is used as filling and insulation of walls (as well as roofs and floors) in buildings of the wooden frame construction. The irregular shape of shives and their low density causes nonhomogenous compaction of composite and the formation of voids between the randomly arranged shives. In this paper the series of hemp-lime composites were tested. Apart from hemp shives, an additional aggregate – expanded perlite was used as a fine, lightweight, thermal insulating Filler. Application of the additional aggregate was aimed to fill the voids between hemp shives and to investigate its influence on the physical properties of composite: apparent density, total porosity, water absorption and thermal conductivity.The use of waste plants in building materials production is consistent with the principles of sustainable development, including waste management, CO2 balance, biodegradability of the material e.g. after building demolition. The porous structure of plant materials determines their usability as the insulation materials. An example of plant applicable in the construction industry is the industrial hemp. The shives are produced from the wooden core of the hemp stem as lightweight insulating Filler in the composite based on lime binder. The discussed hemp-lime composite, due to the presence of lightweight, porous organic aggregates exhibits satisfactory thermal insulation properties and is used as filling and insulation of walls (as well as roofs and floors) in buildings of the wooden frame construction. The irregular shape of shives and their low density causes nonhomogenous compaction of composite and the formation of voids between the randomly arranged shives. In this paper the series of hemp-lime composit...

  • The influence of partial replacement of hemp shives by expanded perlite on physical properties of hemp-lime composite
    2017
    Co-Authors: Przemysław Brzyski, Marcin K Widomski
    Abstract:

    The use of waste plants in building materials production is consistent with the principles of sustainable development, including waste management, CO2 balance, biodegradability of the material e.g. after building demolition. The porous structure of plant materials determines their usability as the insulation materials. An example of plant applicable in the construction industry is the industrial hemp. The shives are produced from the wooden core of the hemp stem as lightweight insulating Filler in the composite based on lime binder. The discussed hemp-lime composite, due to the presence of lightweight, porous organic aggregates exhibits satisfactory thermal insulation properties and is used as filling and insulation of walls (as well as roofs and floors) in buildings of the wooden frame construction. The irregular shape of shives and their low density causes nonhomogenous compaction of composite and the formation of voids between the randomly arranged shives. In this paper the series of hemp-lime composites were tested. Apart from hemp shives, an additional aggregate – expanded perlite was used as a fine, lightweight, thermal insulating Filler. Application of the additional aggregate was aimed to fill the voids between hemp shives and to investigate its influence on the physical properties of composite: apparent density, total porosity, water absorption and thermal conductivity.

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

  • Property optimization of calcium carbonate precipitated in a high shear, circulation reactor
    Powder Technology, 2016
    Co-Authors: Jonna Kuusisto, Taneli Tiittanen, Thaddeus Maloney
    Abstract:

    Abstract Precipitated calcium carbonate (PCC) is a widely used mineral in a range of different Applications. Its properties, such as morphology, particle size and surface area, determine its functionality and will have a large impact on the properties of the end product. This study examines the effect of different parameters in the PCC process on the pigment properties and the end-use properties in a paper Filler Application. The applicability of high shear, rapid solid/liquid mixing machine in lime slaking was examined and the properties of slaked lime prepared at different temperatures and concentrations were measured. For precipitation, a novel lab-scale reactor with a high shear mixer and circulation system was constructed. The precipitations were conducted at varying temperatures, slaked lime concentrations, carbon dioxide (CO 2 ) flow rates and mixing shear rates. The reactor had the rotational mixer in the CO 2 feeding zone, which broke up gas bubbles into different sizes by adjusting the rotation speed. This gave an additional parameter to control the particle size and specific surface area of the PCC particles. High precipitation temperature and calcium-to-carbonate ratio were found to favor the formation of scalenohedral PCC, which gave good optical performance and very low air permeability to paper. The rotation speed of 14,600 rpm was found to be optimal resulting in high optical properties together with good paper bulk. The use of a high shear mixer in the PCC process allowed an additional degree of freedom for engineering pigments with advantageous end-use properties.

Ramesh Kishore Singh - One of the best experts on this subject based on the ideXlab platform.

  • Novel Injectable Calcium Phosphate Bone Cement from Wet Chemical Precipitation Method
    IOP Conference Series: Materials Science and Engineering, 2017
    Co-Authors: Sufiamie Hablee, Iis Sopyan, Maizirwan Mel, Hamzah Mohd. Salleh, Mujibur Rahman, Ramesh Kishore Singh
    Abstract:

    Calcium phosphate cement has been prepared via chemical precipitation method for injectable bone filling materials. Calcium hydroxide, Ca(OH)2, and diammonium hydrogen phosphate, (NH4)2HPO4, were used as calcium and phosphorus precursors respectively. The synthesized powder was mixed with water at different powder-to-liquid (P/L) ratios, which was adjusted at 0.8, 0.9, 1.0, 1.1 and 1.2. The influence of P/L ratio on the injectability, setting time and mechanical strength of calcium phosphate cement paste has been evaluated. The synthesized powder appeared as purely hydroxyapatite with nanosized and agglomerated spherical particles. All cement pastes show excellent injectability except for the paste with P/L ratio 1.2. Calcium phosphate cement with P/L ratio 1.1 shows the ideal cement for bone Filler Application with good injectability, the initial and final setting times of 30 min and 160 min, and the compression strength of 2.47 MPa. The result indicated that the newly developed calcium phosphate cement is physically suitable for bone Filler Application. This paper presents our investigation on the effect of P/L ratio on the handling and mechanical properties of calcium phosphate cement prepared via wet chemical precipitation method.