The Experts below are selected from a list of 35715 Experts worldwide ranked by ideXlab platform
Kenzo Asaoka - One of the best experts on this subject based on the ideXlab platform.
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non decay type fast setting calcium phosphate cement composite with Sodium Alginate
Biomaterials, 1995Co-Authors: Kunio Ishikawa, Youji Miyamoto, Masaru Nagayama, Kenzo AsaokaAbstract:Abstract Non-decay type fast-setting calcium phosphate cement (nd-FSCPC) was prepared by introducing Sodium Alginate (0–2.0 wt%) into the liquid phase of FSCPC. nd-FSCPC was stable even when the cement paste was immersed in distilled water immediately after mixing, whereas conventional FSCPC (c-FSCPC) decayed completely within 1 min upon immersion. The setting time of the cement, approximately 5 min, was not dependent on the presence of Sodium Alginate. In contrast, the introduction of Sodium Alginate into conventional CPC, i.e. CPC without neutral phosphate in the liquid phase, resulted in no setting when the amount of Sodium Alginate introduced was more than 1 wt%. Powder X-ray diffraction analysis revealed no significant difference for the conversion of cement to apatite for any concentrations of Sodium Alginate studied (0–2.0 wt%). The mechanical strength of the cement increased rapidly with the addition of Sodium Alginate up to 0.8 wt% when the cement paste was immersed and kept in distilled water at 37 °C, whereas further addition of Sodium Alginate decreased the mechanical strength. The results obtained in this investigation, taken together with Sodium Alginate's known excellent biocompatibility and absorption behaviour, indicate that the use of Sodium Alginate composite FSCPC as nd-FSCPC should be of value in orthodontics and oral and maxillofacial surgery where the cement is exposed to blood.
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non decay type fast setting calcium phosphate cement composite with Sodium Alginate
Biomaterials, 1995Co-Authors: Kunio Ishikawa, Youji Miyamoto, Masaru Nagayama, Masayuki Kon, Kenzo AsaokaAbstract:Non-decay type fast-setting calcium phosphate cement (nd-FSCPC) was prepared by introducing Sodium Alginate (0-2.0 wt%) into the liquid phase of FSCPC. nd-FSCPC was stable even when the cement paste was immersed in distilled water immediately after mixing, whereas conventional FSCPC (c-FSCPC) decayed completely within 1 min upon immersion. The setting time of the cement, approximately 5 min, was not dependent on the presence of Sodium Alginate. In contrast, the introduction of Sodium Alginate into conventional CPC, i.e. CPC without neutral phosphate in the liquid phase, resulted in no setting when the amount of Sodium Alginate introduced was more than 1 wt%. Powder X-ray diffraction analysis revealed no significant difference for the conversion of cement to apatite for any concentrations of Sodium Alginate studied (0-2.0 wt%). The mechanical strength of the cement increased rapidly with the addition of Sodium Alginate up to 0.8 wt% when the cement paste was immersed and kept in distilled water at 37 degrees C, whereas further addition of Sodium Alginate decreased the mechanical strength. The results obtained in this investigation, taken together with Sodium Alginate's known excellent biocompatibility and absorption behaviour, indicate that the use of Sodium Alginate composite FSCPC as nd-FSCPC should be of value in orthodontics and oral and maxillofacial surgery where the cement is exposed to blood.
Tejraj M Aminabhavi - One of the best experts on this subject based on the ideXlab platform.
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different viscosity grade Sodium Alginate and modified Sodium Alginate membranes in pervaporation separation of water acetic acid and water isopropanol mixtures
Journal of Membrane Science, 2004Co-Authors: Udaya S Toti, Tejraj M AminabhaviAbstract:Abstract Different viscosity grade Sodium Alginate (NaAlg) membranes and modified Sodium Alginate membranes prepared by solution casting method and crosslinked with glutaraldehyde in methanol:water (75:25) mixture were used in pervaporation (PV) separation of water+acetic acid (HAc) and water+isopropanol mixtures at 30 °C for feed mixtures containing 10–50 mass% of water. Equilibrium swelling experiments were performed at 30 °C in order to study the stability of membrane in the fluid environment. Membranes prepared from low viscosity grade Sodium Alginate showed the highest separation selectivity of 15.7 for 10 mass% of water in the feed mixture, whereas membranes prepared with high viscosity grade Sodium Alginate exhibited a selectivity of 14.4 with a slightly higher flux than that observed for the low viscosity grade Sodium Alginate membrane. In an effort to increase the PV performance, low viscosity grade Sodium Alginate was modified by adding 10 mass% of polyethylene glycol (PEG) with varying amounts of poly(vinyl alcohol) (PVA) from 5 to 20 mass%. The modified membranes containing 10 mass% PEG and 5 mass% PVA showed an increase in selectivity up to 40.3 with almost no change in flux. By increasing the amount of PVA from 10 to 20 mass% and keeping 10 mass% of PEG, separation selectivity decreased systematically, but flux increased with increasing PVA content. The modified Sodium Alginate membrane with 5% PVA was further studied for the PV separation of water+isopropanol mixture for which highest selectivity of 3591 was observed. Temperature effect on pervaporation separation was studied for all the membranes; with increasing temperature, flux increased while selectivity decreased. Calculated Arrhenius parameters for permeation and diffusion processes varied depending upon the nature of the membrane.
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Different viscosity grade Sodium Alginate and modified Sodium Alginate membranes in pervaporation separation of water + acetic acid and water + isopropanol mixtures
Journal of Membrane Science, 2004Co-Authors: Udaya S Toti, Tejraj M AminabhaviAbstract:Abstract Different viscosity grade Sodium Alginate (NaAlg) membranes and modified Sodium Alginate membranes prepared by solution casting method and crosslinked with glutaraldehyde in methanol:water (75:25) mixture were used in pervaporation (PV) separation of water+acetic acid (HAc) and water+isopropanol mixtures at 30 °C for feed mixtures containing 10–50 mass% of water. Equilibrium swelling experiments were performed at 30 °C in order to study the stability of membrane in the fluid environment. Membranes prepared from low viscosity grade Sodium Alginate showed the highest separation selectivity of 15.7 for 10 mass% of water in the feed mixture, whereas membranes prepared with high viscosity grade Sodium Alginate exhibited a selectivity of 14.4 with a slightly higher flux than that observed for the low viscosity grade Sodium Alginate membrane. In an effort to increase the PV performance, low viscosity grade Sodium Alginate was modified by adding 10 mass% of polyethylene glycol (PEG) with varying amounts of poly(vinyl alcohol) (PVA) from 5 to 20 mass%. The modified membranes containing 10 mass% PEG and 5 mass% PVA showed an increase in selectivity up to 40.3 with almost no change in flux. By increasing the amount of PVA from 10 to 20 mass% and keeping 10 mass% of PEG, separation selectivity decreased systematically, but flux increased with increasing PVA content. The modified Sodium Alginate membrane with 5% PVA was further studied for the PV separation of water+isopropanol mixture for which highest selectivity of 3591 was observed. Temperature effect on pervaporation separation was studied for all the membranes; with increasing temperature, flux increased while selectivity decreased. Calculated Arrhenius parameters for permeation and diffusion processes varied depending upon the nature of the membrane.
Kunio Ishikawa - One of the best experts on this subject based on the ideXlab platform.
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Effects of Added Sodium Alginate on Mechanical Strength of Apatite Cement
Dental Materials Journal, 2009Co-Authors: Shinya Tajima, Norihiko Nishimoto, Yuji Kishi, Shigeki Matsuya, Kunio IshikawaAbstract:Effects of added Sodium Alginate on the mechanical strength of Biopex®, one type of apatite cement, were investigated since Sodium Alginate addition is very effective for Biopex® to acquire anti-washout property. Addition of Sodium Alginate into the liquid phase of Biopex® resulted in a slower transformation to apatitic monolith. As a result, mechanical strength of set Biopex® in terms of diametral tensile strength (DTS) decreased when it was hardened in an incubator kept at 37°C and 100% relative humidity for 7 days. However, DTS value increased with increase in the amount of added Sodium Alginate when the Biopex® paste was immersed in 0.9% saline at 37°C for 7 days. Set Biopex® with less Sodium Alginate also showed larger porosity. Based on these findings, we concluded that added Sodium Alginate was effective in increasing the mechanical strength of Biopex® by inhibiting liquid penetration into its paste when it is exposed to body fluids.
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non decay type fast setting calcium phosphate cement composite with Sodium Alginate
Biomaterials, 1995Co-Authors: Kunio Ishikawa, Youji Miyamoto, Masaru Nagayama, Kenzo AsaokaAbstract:Abstract Non-decay type fast-setting calcium phosphate cement (nd-FSCPC) was prepared by introducing Sodium Alginate (0–2.0 wt%) into the liquid phase of FSCPC. nd-FSCPC was stable even when the cement paste was immersed in distilled water immediately after mixing, whereas conventional FSCPC (c-FSCPC) decayed completely within 1 min upon immersion. The setting time of the cement, approximately 5 min, was not dependent on the presence of Sodium Alginate. In contrast, the introduction of Sodium Alginate into conventional CPC, i.e. CPC without neutral phosphate in the liquid phase, resulted in no setting when the amount of Sodium Alginate introduced was more than 1 wt%. Powder X-ray diffraction analysis revealed no significant difference for the conversion of cement to apatite for any concentrations of Sodium Alginate studied (0–2.0 wt%). The mechanical strength of the cement increased rapidly with the addition of Sodium Alginate up to 0.8 wt% when the cement paste was immersed and kept in distilled water at 37 °C, whereas further addition of Sodium Alginate decreased the mechanical strength. The results obtained in this investigation, taken together with Sodium Alginate's known excellent biocompatibility and absorption behaviour, indicate that the use of Sodium Alginate composite FSCPC as nd-FSCPC should be of value in orthodontics and oral and maxillofacial surgery where the cement is exposed to blood.
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non decay type fast setting calcium phosphate cement composite with Sodium Alginate
Biomaterials, 1995Co-Authors: Kunio Ishikawa, Youji Miyamoto, Masaru Nagayama, Masayuki Kon, Kenzo AsaokaAbstract:Non-decay type fast-setting calcium phosphate cement (nd-FSCPC) was prepared by introducing Sodium Alginate (0-2.0 wt%) into the liquid phase of FSCPC. nd-FSCPC was stable even when the cement paste was immersed in distilled water immediately after mixing, whereas conventional FSCPC (c-FSCPC) decayed completely within 1 min upon immersion. The setting time of the cement, approximately 5 min, was not dependent on the presence of Sodium Alginate. In contrast, the introduction of Sodium Alginate into conventional CPC, i.e. CPC without neutral phosphate in the liquid phase, resulted in no setting when the amount of Sodium Alginate introduced was more than 1 wt%. Powder X-ray diffraction analysis revealed no significant difference for the conversion of cement to apatite for any concentrations of Sodium Alginate studied (0-2.0 wt%). The mechanical strength of the cement increased rapidly with the addition of Sodium Alginate up to 0.8 wt% when the cement paste was immersed and kept in distilled water at 37 degrees C, whereas further addition of Sodium Alginate decreased the mechanical strength. The results obtained in this investigation, taken together with Sodium Alginate's known excellent biocompatibility and absorption behaviour, indicate that the use of Sodium Alginate composite FSCPC as nd-FSCPC should be of value in orthodontics and oral and maxillofacial surgery where the cement is exposed to blood.
Youji Miyamoto - One of the best experts on this subject based on the ideXlab platform.
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non decay type fast setting calcium phosphate cement composite with Sodium Alginate
Biomaterials, 1995Co-Authors: Kunio Ishikawa, Youji Miyamoto, Masaru Nagayama, Kenzo AsaokaAbstract:Abstract Non-decay type fast-setting calcium phosphate cement (nd-FSCPC) was prepared by introducing Sodium Alginate (0–2.0 wt%) into the liquid phase of FSCPC. nd-FSCPC was stable even when the cement paste was immersed in distilled water immediately after mixing, whereas conventional FSCPC (c-FSCPC) decayed completely within 1 min upon immersion. The setting time of the cement, approximately 5 min, was not dependent on the presence of Sodium Alginate. In contrast, the introduction of Sodium Alginate into conventional CPC, i.e. CPC without neutral phosphate in the liquid phase, resulted in no setting when the amount of Sodium Alginate introduced was more than 1 wt%. Powder X-ray diffraction analysis revealed no significant difference for the conversion of cement to apatite for any concentrations of Sodium Alginate studied (0–2.0 wt%). The mechanical strength of the cement increased rapidly with the addition of Sodium Alginate up to 0.8 wt% when the cement paste was immersed and kept in distilled water at 37 °C, whereas further addition of Sodium Alginate decreased the mechanical strength. The results obtained in this investigation, taken together with Sodium Alginate's known excellent biocompatibility and absorption behaviour, indicate that the use of Sodium Alginate composite FSCPC as nd-FSCPC should be of value in orthodontics and oral and maxillofacial surgery where the cement is exposed to blood.
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non decay type fast setting calcium phosphate cement composite with Sodium Alginate
Biomaterials, 1995Co-Authors: Kunio Ishikawa, Youji Miyamoto, Masaru Nagayama, Masayuki Kon, Kenzo AsaokaAbstract:Non-decay type fast-setting calcium phosphate cement (nd-FSCPC) was prepared by introducing Sodium Alginate (0-2.0 wt%) into the liquid phase of FSCPC. nd-FSCPC was stable even when the cement paste was immersed in distilled water immediately after mixing, whereas conventional FSCPC (c-FSCPC) decayed completely within 1 min upon immersion. The setting time of the cement, approximately 5 min, was not dependent on the presence of Sodium Alginate. In contrast, the introduction of Sodium Alginate into conventional CPC, i.e. CPC without neutral phosphate in the liquid phase, resulted in no setting when the amount of Sodium Alginate introduced was more than 1 wt%. Powder X-ray diffraction analysis revealed no significant difference for the conversion of cement to apatite for any concentrations of Sodium Alginate studied (0-2.0 wt%). The mechanical strength of the cement increased rapidly with the addition of Sodium Alginate up to 0.8 wt% when the cement paste was immersed and kept in distilled water at 37 degrees C, whereas further addition of Sodium Alginate decreased the mechanical strength. The results obtained in this investigation, taken together with Sodium Alginate's known excellent biocompatibility and absorption behaviour, indicate that the use of Sodium Alginate composite FSCPC as nd-FSCPC should be of value in orthodontics and oral and maxillofacial surgery where the cement is exposed to blood.
Masaru Nagayama - One of the best experts on this subject based on the ideXlab platform.
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non decay type fast setting calcium phosphate cement composite with Sodium Alginate
Biomaterials, 1995Co-Authors: Kunio Ishikawa, Youji Miyamoto, Masaru Nagayama, Kenzo AsaokaAbstract:Abstract Non-decay type fast-setting calcium phosphate cement (nd-FSCPC) was prepared by introducing Sodium Alginate (0–2.0 wt%) into the liquid phase of FSCPC. nd-FSCPC was stable even when the cement paste was immersed in distilled water immediately after mixing, whereas conventional FSCPC (c-FSCPC) decayed completely within 1 min upon immersion. The setting time of the cement, approximately 5 min, was not dependent on the presence of Sodium Alginate. In contrast, the introduction of Sodium Alginate into conventional CPC, i.e. CPC without neutral phosphate in the liquid phase, resulted in no setting when the amount of Sodium Alginate introduced was more than 1 wt%. Powder X-ray diffraction analysis revealed no significant difference for the conversion of cement to apatite for any concentrations of Sodium Alginate studied (0–2.0 wt%). The mechanical strength of the cement increased rapidly with the addition of Sodium Alginate up to 0.8 wt% when the cement paste was immersed and kept in distilled water at 37 °C, whereas further addition of Sodium Alginate decreased the mechanical strength. The results obtained in this investigation, taken together with Sodium Alginate's known excellent biocompatibility and absorption behaviour, indicate that the use of Sodium Alginate composite FSCPC as nd-FSCPC should be of value in orthodontics and oral and maxillofacial surgery where the cement is exposed to blood.
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non decay type fast setting calcium phosphate cement composite with Sodium Alginate
Biomaterials, 1995Co-Authors: Kunio Ishikawa, Youji Miyamoto, Masaru Nagayama, Masayuki Kon, Kenzo AsaokaAbstract:Non-decay type fast-setting calcium phosphate cement (nd-FSCPC) was prepared by introducing Sodium Alginate (0-2.0 wt%) into the liquid phase of FSCPC. nd-FSCPC was stable even when the cement paste was immersed in distilled water immediately after mixing, whereas conventional FSCPC (c-FSCPC) decayed completely within 1 min upon immersion. The setting time of the cement, approximately 5 min, was not dependent on the presence of Sodium Alginate. In contrast, the introduction of Sodium Alginate into conventional CPC, i.e. CPC without neutral phosphate in the liquid phase, resulted in no setting when the amount of Sodium Alginate introduced was more than 1 wt%. Powder X-ray diffraction analysis revealed no significant difference for the conversion of cement to apatite for any concentrations of Sodium Alginate studied (0-2.0 wt%). The mechanical strength of the cement increased rapidly with the addition of Sodium Alginate up to 0.8 wt% when the cement paste was immersed and kept in distilled water at 37 degrees C, whereas further addition of Sodium Alginate decreased the mechanical strength. The results obtained in this investigation, taken together with Sodium Alginate's known excellent biocompatibility and absorption behaviour, indicate that the use of Sodium Alginate composite FSCPC as nd-FSCPC should be of value in orthodontics and oral and maxillofacial surgery where the cement is exposed to blood.
