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John Bozzola - One of the best experts on this subject based on the ideXlab platform.
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Protocell-like Microspheres from Thermal Polyaspartic Acid
Origins of Life and Evolution of Biospheres, 2006Co-Authors: Peter R. Bahn, Aristotel Pappelis, John BozzolaAbstract:One of the most prominent amino Acids to appear in monomer-generating origin-of-life experiments is aspartic Acid. Hugo Schiff found in 1897 that aspartic Acid polymerizes when heated to form polyaspartylimide which hydrolyzes in basic aqueous solution to form thermal Polyaspartic Acid which is a branched polypeptide. We recently reported at the ISSOL 2005 Conference that commercially made thermal Polyaspartic Acid forms microspheres when heated in boiling water and allowed to cool. In a new experiment we heated aspartic Acid at 180°C for up to 100 h to form thermal polyaspartylimide which when heated in boiling water without addition of base hydrolyzed to form thermal Polyaspartic Acid which upon cooling formed microspheres. Thermal Polyaspartic Acid microspheres appear protocell-like in the sense of being prebiotically plausible lattices or containers that could eventually have been filled with just the right additions of primordial proteins, nucleic Acids, lipids, and metabolites so as to constitute protocells capable of undergoing further chemical and biological evolution. Thermal Polyaspartic Acid microspheres are extremely simple models of protocells that are more amenable to precise quantitative experimental investigation than the proteinoid microspheres of Sidney W. Fox. We present here scanning electron microscope images of such thermal Polyaspartic Acid microspheres. Figure 1 shows thermal Polyaspartic Acid microspheres from l -aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Figure 2 shows thermal Polyaspartic Acid microspheres from the same sample at a magnification of 7,000×. The thermal Polyaspartic Acid microspheres have a diameter of approximately 1 μm These images were viewed with a Hitachi S2460N scanning electron microscope at 20 kV acceleration voltage. Figure 1 Thermal Polyaspartic Acid microspheres from l -aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Figure 2 Thermal Polyaspartic Acid microspheres from l -aspartic Acid heated at 180°C for 50 h, at a magnification of 7,000×.
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Protocell-like microspheres from thermal Polyaspartic Acid.
Origins of life and evolution of the biosphere : the journal of the International Society for the Study of the Origin of Life, 2006Co-Authors: Peter R. Bahn, Aristotel Pappelis, John BozzolaAbstract:One of the most prominent amino Acids to appear in monomer-generating origin-of-life experiments is aspartic Acid. Hugo Schiff found in 1897 that aspartic Acid polymerizes when heated to form polyaspartylimide which hydrolyzes in basic aqueous solution to form thermal Polyaspartic Acid which is a branched polypeptide. We recently reported at the ISSOL 2005 Conference that commercially made thermal Polyaspartic Acid forms microspheres when heated in boiling water and allowed to cool. In a new experiment we heated aspartic Acid at 180 degrees C for up to 100 h to form thermal polyaspartylimide which when heated in boiling water without addition of base hydrolyzed to form thermal Polyaspartic Acid which upon cooling formed microspheres. Thermal Polyaspartic Acid microspheres appear protocell-like in the sense of being prebiotically plausible lattices or containers that could eventually have been filled with just the right additions of primordial proteins, nucleic Acids, lipids, and metabolites so as to constitute protocells capable of undergoing further chemical and biological evolution. Thermal Polyaspartic Acid microspheres are extremely simple models of protocells that are more amenable to precise quantitative experimental investigation than the proteinoid microspheres of Sidney W. Fox. We present here scanning electron microscope images of such thermal Polyaspartic Acid microspheres. Figure 1 shows thermal Polyaspartic Acid microspheres from L: -aspartic Acid heated at 180 degrees C for 50 h, at a magnification of 3,500x. Figure 2 shows thermal Polyaspartic Acid microspheres from the same sample at a magnification of 7,000x. The thermal Polyaspartic Acid microspheres have a diameter of approximately 1 mum These images were viewed with a Hitachi S2460N scanning electron microscope at 20 kV acceleration voltage. Figure 1 Thermal Polyaspartic Acid microspheres from L: -aspartic Acid heated at 180 degrees C for 50 h, at a magnification of 3,500x. Figure 2 Thermal Polyaspartic Acid microspheres from L: -aspartic Acid heated at 180 degrees C for 50 h, at a magnification of 7,000x.
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Protocell-like microspheres from thermal Polyaspartic Acid.
Origins of Life and Evolution of Biospheres, 2006Co-Authors: Peter R. Bahn, Aristotel Pappelis, John BozzolaAbstract:One of the most prominent amino Acids to appear in monomer-generating origin-of-life experiments is aspartic Acid. Hugo Schiff found in 1897 that aspartic Acid polymerizes when heated to form polyaspartylimide which hydrolyzes in basic aqueous solution to form thermal Polyaspartic Acid which is a branched polypeptide. We recently reported at the ISSOL 2005 Conference that commercially made thermal Polyaspartic Acid forms microspheres when heated in boiling water and allowed to cool. In a new experiment we heated aspartic Acid at 180°C for up to 100 h to form thermal polyaspartylimide which when heated in boiling water without addition of base hydrolyzed to form thermal Polyaspartic Acid which upon cooling formed microspheres. Thermal Polyaspartic Acid microspheres appear protocell-like in the sense of being prebiotically plausible lattices or containers that could eventually have been filled with just the right additions of primordial proteins, nucleic Acids, lipids, and metabolites so as to constitute protocells capable of undergoing further chemical and biological evolution. Thermal Polyaspartic Acid microspheres are extremely simple models of protocells that are more amenable to precise quantitative experimental investigation than the proteinoid microspheres of Sidney W. Fox. We present here scanning electron microscope images of such thermal Polyaspartic Acid microspheres. Figure 1 shows thermal Polyaspartic Acid microspheres from l-aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Figure 2 shows thermal Polyaspartic Acid microspheres from the same sample at a magnification of 7,000×. The thermal Polyaspartic Acid microspheres have a diameter of approximately 1 μm These images were viewed with a Hitachi S2460N scanning electron microscope at 20 kV acceleration voltage. Open image in new window Figure 1 Thermal Polyaspartic Acid microspheres from l-aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Open image in new window Figure 2 Thermal Polyaspartic Acid microspheres from l-aspartic Acid heated at 180°C for 50 h, at a magnification of 7,000×.
Peter R. Bahn - One of the best experts on this subject based on the ideXlab platform.
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Protocell-like Microspheres from Thermal Polyaspartic Acid
Origins of Life and Evolution of Biospheres, 2006Co-Authors: Peter R. Bahn, Aristotel Pappelis, John BozzolaAbstract:One of the most prominent amino Acids to appear in monomer-generating origin-of-life experiments is aspartic Acid. Hugo Schiff found in 1897 that aspartic Acid polymerizes when heated to form polyaspartylimide which hydrolyzes in basic aqueous solution to form thermal Polyaspartic Acid which is a branched polypeptide. We recently reported at the ISSOL 2005 Conference that commercially made thermal Polyaspartic Acid forms microspheres when heated in boiling water and allowed to cool. In a new experiment we heated aspartic Acid at 180°C for up to 100 h to form thermal polyaspartylimide which when heated in boiling water without addition of base hydrolyzed to form thermal Polyaspartic Acid which upon cooling formed microspheres. Thermal Polyaspartic Acid microspheres appear protocell-like in the sense of being prebiotically plausible lattices or containers that could eventually have been filled with just the right additions of primordial proteins, nucleic Acids, lipids, and metabolites so as to constitute protocells capable of undergoing further chemical and biological evolution. Thermal Polyaspartic Acid microspheres are extremely simple models of protocells that are more amenable to precise quantitative experimental investigation than the proteinoid microspheres of Sidney W. Fox. We present here scanning electron microscope images of such thermal Polyaspartic Acid microspheres. Figure 1 shows thermal Polyaspartic Acid microspheres from l -aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Figure 2 shows thermal Polyaspartic Acid microspheres from the same sample at a magnification of 7,000×. The thermal Polyaspartic Acid microspheres have a diameter of approximately 1 μm These images were viewed with a Hitachi S2460N scanning electron microscope at 20 kV acceleration voltage. Figure 1 Thermal Polyaspartic Acid microspheres from l -aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Figure 2 Thermal Polyaspartic Acid microspheres from l -aspartic Acid heated at 180°C for 50 h, at a magnification of 7,000×.
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Protocell-like microspheres from thermal Polyaspartic Acid.
Origins of life and evolution of the biosphere : the journal of the International Society for the Study of the Origin of Life, 2006Co-Authors: Peter R. Bahn, Aristotel Pappelis, John BozzolaAbstract:One of the most prominent amino Acids to appear in monomer-generating origin-of-life experiments is aspartic Acid. Hugo Schiff found in 1897 that aspartic Acid polymerizes when heated to form polyaspartylimide which hydrolyzes in basic aqueous solution to form thermal Polyaspartic Acid which is a branched polypeptide. We recently reported at the ISSOL 2005 Conference that commercially made thermal Polyaspartic Acid forms microspheres when heated in boiling water and allowed to cool. In a new experiment we heated aspartic Acid at 180 degrees C for up to 100 h to form thermal polyaspartylimide which when heated in boiling water without addition of base hydrolyzed to form thermal Polyaspartic Acid which upon cooling formed microspheres. Thermal Polyaspartic Acid microspheres appear protocell-like in the sense of being prebiotically plausible lattices or containers that could eventually have been filled with just the right additions of primordial proteins, nucleic Acids, lipids, and metabolites so as to constitute protocells capable of undergoing further chemical and biological evolution. Thermal Polyaspartic Acid microspheres are extremely simple models of protocells that are more amenable to precise quantitative experimental investigation than the proteinoid microspheres of Sidney W. Fox. We present here scanning electron microscope images of such thermal Polyaspartic Acid microspheres. Figure 1 shows thermal Polyaspartic Acid microspheres from L: -aspartic Acid heated at 180 degrees C for 50 h, at a magnification of 3,500x. Figure 2 shows thermal Polyaspartic Acid microspheres from the same sample at a magnification of 7,000x. The thermal Polyaspartic Acid microspheres have a diameter of approximately 1 mum These images were viewed with a Hitachi S2460N scanning electron microscope at 20 kV acceleration voltage. Figure 1 Thermal Polyaspartic Acid microspheres from L: -aspartic Acid heated at 180 degrees C for 50 h, at a magnification of 3,500x. Figure 2 Thermal Polyaspartic Acid microspheres from L: -aspartic Acid heated at 180 degrees C for 50 h, at a magnification of 7,000x.
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Protocell-like microspheres from thermal Polyaspartic Acid.
Origins of Life and Evolution of Biospheres, 2006Co-Authors: Peter R. Bahn, Aristotel Pappelis, John BozzolaAbstract:One of the most prominent amino Acids to appear in monomer-generating origin-of-life experiments is aspartic Acid. Hugo Schiff found in 1897 that aspartic Acid polymerizes when heated to form polyaspartylimide which hydrolyzes in basic aqueous solution to form thermal Polyaspartic Acid which is a branched polypeptide. We recently reported at the ISSOL 2005 Conference that commercially made thermal Polyaspartic Acid forms microspheres when heated in boiling water and allowed to cool. In a new experiment we heated aspartic Acid at 180°C for up to 100 h to form thermal polyaspartylimide which when heated in boiling water without addition of base hydrolyzed to form thermal Polyaspartic Acid which upon cooling formed microspheres. Thermal Polyaspartic Acid microspheres appear protocell-like in the sense of being prebiotically plausible lattices or containers that could eventually have been filled with just the right additions of primordial proteins, nucleic Acids, lipids, and metabolites so as to constitute protocells capable of undergoing further chemical and biological evolution. Thermal Polyaspartic Acid microspheres are extremely simple models of protocells that are more amenable to precise quantitative experimental investigation than the proteinoid microspheres of Sidney W. Fox. We present here scanning electron microscope images of such thermal Polyaspartic Acid microspheres. Figure 1 shows thermal Polyaspartic Acid microspheres from l-aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Figure 2 shows thermal Polyaspartic Acid microspheres from the same sample at a magnification of 7,000×. The thermal Polyaspartic Acid microspheres have a diameter of approximately 1 μm These images were viewed with a Hitachi S2460N scanning electron microscope at 20 kV acceleration voltage. Open image in new window Figure 1 Thermal Polyaspartic Acid microspheres from l-aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Open image in new window Figure 2 Thermal Polyaspartic Acid microspheres from l-aspartic Acid heated at 180°C for 50 h, at a magnification of 7,000×.
Yingzhan Wang - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and scale inhibitor performance of Polyaspartic Acid
Journal of Environmental Sciences-china, 2011Co-Authors: Zhengyan Liu, Yonghong Sun, Xiaohui Zhou, Ying Tian, Yingzhan WangAbstract:Polyaspartic Acid (PASP) has been extensively studied in recent years as a green scale inhibitor. PASP was synthesized by thermal polycondensation of maleic anhydride and ammonium carbonate in this study. The optimal polycondensation reaction conditions were the raw material (maleic anhydride and ammonium carbonate) molar ratio of 1.0:1.2, the polymerization temperature of 180°C and reaction time of 2.0 hr. The results showed that PASP exhibits very good scale inhibiting performance. The inhibition rate was 95% for calcium carbonate and 90% for calcium sulfate by the application of 5 mg/L PASP.
Aristotel Pappelis - One of the best experts on this subject based on the ideXlab platform.
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Protocell-like Microspheres from Thermal Polyaspartic Acid
Origins of Life and Evolution of Biospheres, 2006Co-Authors: Peter R. Bahn, Aristotel Pappelis, John BozzolaAbstract:One of the most prominent amino Acids to appear in monomer-generating origin-of-life experiments is aspartic Acid. Hugo Schiff found in 1897 that aspartic Acid polymerizes when heated to form polyaspartylimide which hydrolyzes in basic aqueous solution to form thermal Polyaspartic Acid which is a branched polypeptide. We recently reported at the ISSOL 2005 Conference that commercially made thermal Polyaspartic Acid forms microspheres when heated in boiling water and allowed to cool. In a new experiment we heated aspartic Acid at 180°C for up to 100 h to form thermal polyaspartylimide which when heated in boiling water without addition of base hydrolyzed to form thermal Polyaspartic Acid which upon cooling formed microspheres. Thermal Polyaspartic Acid microspheres appear protocell-like in the sense of being prebiotically plausible lattices or containers that could eventually have been filled with just the right additions of primordial proteins, nucleic Acids, lipids, and metabolites so as to constitute protocells capable of undergoing further chemical and biological evolution. Thermal Polyaspartic Acid microspheres are extremely simple models of protocells that are more amenable to precise quantitative experimental investigation than the proteinoid microspheres of Sidney W. Fox. We present here scanning electron microscope images of such thermal Polyaspartic Acid microspheres. Figure 1 shows thermal Polyaspartic Acid microspheres from l -aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Figure 2 shows thermal Polyaspartic Acid microspheres from the same sample at a magnification of 7,000×. The thermal Polyaspartic Acid microspheres have a diameter of approximately 1 μm These images were viewed with a Hitachi S2460N scanning electron microscope at 20 kV acceleration voltage. Figure 1 Thermal Polyaspartic Acid microspheres from l -aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Figure 2 Thermal Polyaspartic Acid microspheres from l -aspartic Acid heated at 180°C for 50 h, at a magnification of 7,000×.
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Protocell-like microspheres from thermal Polyaspartic Acid.
Origins of life and evolution of the biosphere : the journal of the International Society for the Study of the Origin of Life, 2006Co-Authors: Peter R. Bahn, Aristotel Pappelis, John BozzolaAbstract:One of the most prominent amino Acids to appear in monomer-generating origin-of-life experiments is aspartic Acid. Hugo Schiff found in 1897 that aspartic Acid polymerizes when heated to form polyaspartylimide which hydrolyzes in basic aqueous solution to form thermal Polyaspartic Acid which is a branched polypeptide. We recently reported at the ISSOL 2005 Conference that commercially made thermal Polyaspartic Acid forms microspheres when heated in boiling water and allowed to cool. In a new experiment we heated aspartic Acid at 180 degrees C for up to 100 h to form thermal polyaspartylimide which when heated in boiling water without addition of base hydrolyzed to form thermal Polyaspartic Acid which upon cooling formed microspheres. Thermal Polyaspartic Acid microspheres appear protocell-like in the sense of being prebiotically plausible lattices or containers that could eventually have been filled with just the right additions of primordial proteins, nucleic Acids, lipids, and metabolites so as to constitute protocells capable of undergoing further chemical and biological evolution. Thermal Polyaspartic Acid microspheres are extremely simple models of protocells that are more amenable to precise quantitative experimental investigation than the proteinoid microspheres of Sidney W. Fox. We present here scanning electron microscope images of such thermal Polyaspartic Acid microspheres. Figure 1 shows thermal Polyaspartic Acid microspheres from L: -aspartic Acid heated at 180 degrees C for 50 h, at a magnification of 3,500x. Figure 2 shows thermal Polyaspartic Acid microspheres from the same sample at a magnification of 7,000x. The thermal Polyaspartic Acid microspheres have a diameter of approximately 1 mum These images were viewed with a Hitachi S2460N scanning electron microscope at 20 kV acceleration voltage. Figure 1 Thermal Polyaspartic Acid microspheres from L: -aspartic Acid heated at 180 degrees C for 50 h, at a magnification of 3,500x. Figure 2 Thermal Polyaspartic Acid microspheres from L: -aspartic Acid heated at 180 degrees C for 50 h, at a magnification of 7,000x.
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Protocell-like microspheres from thermal Polyaspartic Acid.
Origins of Life and Evolution of Biospheres, 2006Co-Authors: Peter R. Bahn, Aristotel Pappelis, John BozzolaAbstract:One of the most prominent amino Acids to appear in monomer-generating origin-of-life experiments is aspartic Acid. Hugo Schiff found in 1897 that aspartic Acid polymerizes when heated to form polyaspartylimide which hydrolyzes in basic aqueous solution to form thermal Polyaspartic Acid which is a branched polypeptide. We recently reported at the ISSOL 2005 Conference that commercially made thermal Polyaspartic Acid forms microspheres when heated in boiling water and allowed to cool. In a new experiment we heated aspartic Acid at 180°C for up to 100 h to form thermal polyaspartylimide which when heated in boiling water without addition of base hydrolyzed to form thermal Polyaspartic Acid which upon cooling formed microspheres. Thermal Polyaspartic Acid microspheres appear protocell-like in the sense of being prebiotically plausible lattices or containers that could eventually have been filled with just the right additions of primordial proteins, nucleic Acids, lipids, and metabolites so as to constitute protocells capable of undergoing further chemical and biological evolution. Thermal Polyaspartic Acid microspheres are extremely simple models of protocells that are more amenable to precise quantitative experimental investigation than the proteinoid microspheres of Sidney W. Fox. We present here scanning electron microscope images of such thermal Polyaspartic Acid microspheres. Figure 1 shows thermal Polyaspartic Acid microspheres from l-aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Figure 2 shows thermal Polyaspartic Acid microspheres from the same sample at a magnification of 7,000×. The thermal Polyaspartic Acid microspheres have a diameter of approximately 1 μm These images were viewed with a Hitachi S2460N scanning electron microscope at 20 kV acceleration voltage. Open image in new window Figure 1 Thermal Polyaspartic Acid microspheres from l-aspartic Acid heated at 180°C for 50 h, at a magnification of 3,500×. Open image in new window Figure 2 Thermal Polyaspartic Acid microspheres from l-aspartic Acid heated at 180°C for 50 h, at a magnification of 7,000×.
Amita Malik - One of the best experts on this subject based on the ideXlab platform.
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Polyaspartic Acid based superabsorbent polymers
2018Co-Authors: Shilpa Sharma, Amita Dua, Amita MalikAbstract:Abstract Superabsorbent polymers are widely used in many applications such as disposable diapers, feminine napkins, soil for agriculture and horticulture, gel actuators, water-blocking tapes, drug delivery systems, absorbent pads and other biomedical applications. Most of these superabsorbents are non-biodegradable and thus increasing burden on the earth. Polymer scientist and chemists are looking for environmental friendly solutions. Polyaspartic Acid polymers have been reported to possess biodegradable properties. These polymers have been developed mainly as polyelectrolyte. However, this review compiles the work carried on developing Polyaspartic Acid based superabsorbent polymers. The review covers synthetic methodology, characterization of these polymers by different techniques, different types of polymer prepared using Polyaspartic polymers which include co-polymers, grafted polymers, interpenetrating and semi-interpenetrating polymers are covered. The biodegradability studies carried out on the superabsorbent polymers are also discussed.
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superabsorbent polymer gels based on Polyaspartic Acid and polyacrylic Acid
Journal of Material Sciences & Engineering, 2016Co-Authors: Shilpa Sharma, Amita MalikAbstract:Polymer gels based on Polyaspartic Acid (PAsp) and polyacrylic Acid (PAA) have been synthesised using ethylene glycol dimethylacrylate (diacrylate-EGDMA) and Trimethylolpropane triacrylate (Triacrylate-TMPTA) as cross-linkers. Swelling behaviour of these polymers has been studied in different solutions like glucose, saline and water. The swelling behaviour of these polymers has also been studied under different pH conditions. The swelling capacity has also been analysed under load to have an idea of the gel strength (Absorbency under Load-AUL). Best absorbing characteristics, as indicated by the swelling behaviour, have been observed in case of polymer gels synthesized with EGDMA. Polymers with maximum PAsp have shown maximum superabsorbent properties in case of EGDMA as a cross-linker. However, with TMPTA as a cross-linker molar mass ratio of 1:2 Polyaspartic Acid: acrylic Acid have shown better results. These polymers have better superabsorbent characteristics. TMPTA based polymers have shown better properties under load than EGDMA These polymers can be used as smart polymers for various applications e,g., drug delivery, materials for wound dressings, etc as they have shown varying behaviour in different conditions. The structure of the polymers has been studied by FTIR (Fourier Transform Infrared spectroscopy) and NMR (Nuclear Magnetic Resonance Spectroscopy). The surface morphology has further supported the results.