The Experts below are selected from a list of 90 Experts worldwide ranked by ideXlab platform

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

  • semi automatic octave spanning optical Frequency Counter
    Optics Express, 2008
    Co-Authors: Tzea Liu, Renhuei Shu, Jinlong Peng
    Abstract:

    This work presents and demonstrates a semi-automatic optical Frequency Counter with octave-spanning counting capability using two fiber laser combs operated at different repetition rates. Monochromators are utilized to provide an approximate Frequency of the laser under measurement to determine the mode number difference between the two laser combs. The exact mode number of the beating comb line is obtained from the mode number difference and the measured beat frequencies. The entire measurement process, except the Frequency stabilization of the laser combs and the optimization of the beat signal-to-noise ratio, is controlled by a computer running a semi-automatic optical Frequency Counter.

  • semi automatic octave spanning optical Frequency Counter
    Conference on Lasers and Electro-Optics, 2007
    Co-Authors: Tzea Liu, Renhuei Shu, Jinlong Peng
    Abstract:

    We used a monochrometer to determine the mode number difference between two laser combs and derived the comb number without using a wavemeter or scanning the repetition rate for the semi-automatic, octave-spanning optical Frequency Counter.

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

  • effect of multi Frequency Counter current s type ultrasound pretreatment on the enzymatic hydrolysis of defatted corn germ protein kinetics and thermodynamics
    Process Biochemistry, 2019
    Co-Authors: Abubak Musa, Mohammed A A Gasmalla, Frederick Sarpong, Faisal N Awad, Yuqing Dua
    Abstract:

    Abstract In this paper, the impact of ultrasound pretreatment on the kinetics and thermodynamics of defatted corn germ protein (DCGP) enzymatic hydrolysis was evaluated. The enzymatic hydrolysis kinetics and thermodynamics were studied for traditional method and ultrasonic pretreatments with a single-Frequency Counter-current S type (20 KHz) (SFU) and a multi-Frequency Counter-current S type (20, 28, 35 and 40 KHz) (MFU). The results showed that the traditional, SFU and MFU pretreated enzymatic hydrolysis of DCGP followed the First-order kinetic model. Again, the SFU and MFU pretreatments enhanced the enzymatic hydrolysis of DCGP. Compared to traditional enzymatic hydrolysis, the reaction rate constant values were increased by 50.0%, 54.7%, 47.8% and 52.3% for SFU pretreated enzymatic hydrolysis, and 58.0%, 58.5, 53.6% and 54.7% for MFU pretreated enzymatic hydrolysis at 20, 30, 40 and 50 oC respectively. Also, the results showed that the SFU and MFU ultrasound pretreatments of DCGP reduced the thermodynamic parameters which included the activation energy (Ea), enthalpy (ΔH), entropies (ΔS) and Gibbs free energy (ΔG) in enzymatic hydrolysis reaction.

  • effect of a multi Frequency Counter current s type ultrasound pretreatment on the defatted corn germ protein enzymatic hydrolysis ace inhibitory activity and structural characterization
    Food & Function, 2019
    Co-Authors: Abubak Musa, Mohammed A A Gasmalla, Frederick Sarpong, Faisal N Awad, Asif Wali, Yuqing Dua
    Abstract:

    In this work, a defatted corn germ protein (DCGP) was pretreated with single Frequency ultrasound at 20 kHz (SFU) and multi-Frequency ultrasounds (20, 28, 35 and 40 kHz) (MFU). The microstructures, morphology, amino acid content, degree of hydrolysis, protein hydrolysate concentration and angiotensin-converting enzyme (ACE) inhibitory activity of the DCGP hydrolysate were analyzed. The results showed that both SFU and MFU pretreatments increased the ACE inhibitory activity of the DCGP hydrolysate more than that observed for the traditional method. Also, the SFU pretreatment showed the highest ACE inhibitory activity of 54% in comparison with that of the DCGP hydrolysates obtained via the traditional and MFU pretreatment methods. The results of ultraviolet-visible (UV-Vis) spectroscopy, fluorescence spectroscopy, surface hydrophobicity studies, Fourier-transform infrared spectroscopy (FTIR), atomic force microscopy (AFM) and scanning electron microscopy (SEM) confirmed the extent of the changes that occurred in the microstructures and morphology of DCGP pretreated with SFU and MFU. The results also indicated that the hydrophobic amino acid concentration was comparably higher in DCGP pretreated with SFU and MFU than that in the DCG protein isolated via the traditional method.

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

  • effect of multi Frequency Counter current s type ultrasound pretreatment on the enzymatic hydrolysis of defatted corn germ protein kinetics and thermodynamics
    Process Biochemistry, 2019
    Co-Authors: Abubak Musa, Mohammed A A Gasmalla, Frederick Sarpong, Faisal N Awad, Yuqing Dua
    Abstract:

    Abstract In this paper, the impact of ultrasound pretreatment on the kinetics and thermodynamics of defatted corn germ protein (DCGP) enzymatic hydrolysis was evaluated. The enzymatic hydrolysis kinetics and thermodynamics were studied for traditional method and ultrasonic pretreatments with a single-Frequency Counter-current S type (20 KHz) (SFU) and a multi-Frequency Counter-current S type (20, 28, 35 and 40 KHz) (MFU). The results showed that the traditional, SFU and MFU pretreated enzymatic hydrolysis of DCGP followed the First-order kinetic model. Again, the SFU and MFU pretreatments enhanced the enzymatic hydrolysis of DCGP. Compared to traditional enzymatic hydrolysis, the reaction rate constant values were increased by 50.0%, 54.7%, 47.8% and 52.3% for SFU pretreated enzymatic hydrolysis, and 58.0%, 58.5, 53.6% and 54.7% for MFU pretreated enzymatic hydrolysis at 20, 30, 40 and 50 oC respectively. Also, the results showed that the SFU and MFU ultrasound pretreatments of DCGP reduced the thermodynamic parameters which included the activation energy (Ea), enthalpy (ΔH), entropies (ΔS) and Gibbs free energy (ΔG) in enzymatic hydrolysis reaction.

  • effect of a multi Frequency Counter current s type ultrasound pretreatment on the defatted corn germ protein enzymatic hydrolysis ace inhibitory activity and structural characterization
    Food & Function, 2019
    Co-Authors: Abubak Musa, Mohammed A A Gasmalla, Frederick Sarpong, Faisal N Awad, Asif Wali, Yuqing Dua
    Abstract:

    In this work, a defatted corn germ protein (DCGP) was pretreated with single Frequency ultrasound at 20 kHz (SFU) and multi-Frequency ultrasounds (20, 28, 35 and 40 kHz) (MFU). The microstructures, morphology, amino acid content, degree of hydrolysis, protein hydrolysate concentration and angiotensin-converting enzyme (ACE) inhibitory activity of the DCGP hydrolysate were analyzed. The results showed that both SFU and MFU pretreatments increased the ACE inhibitory activity of the DCGP hydrolysate more than that observed for the traditional method. Also, the SFU pretreatment showed the highest ACE inhibitory activity of 54% in comparison with that of the DCGP hydrolysates obtained via the traditional and MFU pretreatment methods. The results of ultraviolet-visible (UV-Vis) spectroscopy, fluorescence spectroscopy, surface hydrophobicity studies, Fourier-transform infrared spectroscopy (FTIR), atomic force microscopy (AFM) and scanning electron microscopy (SEM) confirmed the extent of the changes that occurred in the microstructures and morphology of DCGP pretreated with SFU and MFU. The results also indicated that the hydrophobic amino acid concentration was comparably higher in DCGP pretreated with SFU and MFU than that in the DCG protein isolated via the traditional method.

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

  • semi automatic octave spanning optical Frequency Counter
    Optics Express, 2008
    Co-Authors: Tzea Liu, Renhuei Shu, Jinlong Peng
    Abstract:

    This work presents and demonstrates a semi-automatic optical Frequency Counter with octave-spanning counting capability using two fiber laser combs operated at different repetition rates. Monochromators are utilized to provide an approximate Frequency of the laser under measurement to determine the mode number difference between the two laser combs. The exact mode number of the beating comb line is obtained from the mode number difference and the measured beat frequencies. The entire measurement process, except the Frequency stabilization of the laser combs and the optimization of the beat signal-to-noise ratio, is controlled by a computer running a semi-automatic optical Frequency Counter.

  • semi automatic octave spanning optical Frequency Counter
    Conference on Lasers and Electro-Optics, 2007
    Co-Authors: Tzea Liu, Renhuei Shu, Jinlong Peng
    Abstract:

    We used a monochrometer to determine the mode number difference between two laser combs and derived the comb number without using a wavemeter or scanning the repetition rate for the semi-automatic, octave-spanning optical Frequency Counter.

Mohammed A A Gasmalla - One of the best experts on this subject based on the ideXlab platform.

  • effect of multi Frequency Counter current s type ultrasound pretreatment on the enzymatic hydrolysis of defatted corn germ protein kinetics and thermodynamics
    Process Biochemistry, 2019
    Co-Authors: Abubak Musa, Mohammed A A Gasmalla, Frederick Sarpong, Faisal N Awad, Yuqing Dua
    Abstract:

    Abstract In this paper, the impact of ultrasound pretreatment on the kinetics and thermodynamics of defatted corn germ protein (DCGP) enzymatic hydrolysis was evaluated. The enzymatic hydrolysis kinetics and thermodynamics were studied for traditional method and ultrasonic pretreatments with a single-Frequency Counter-current S type (20 KHz) (SFU) and a multi-Frequency Counter-current S type (20, 28, 35 and 40 KHz) (MFU). The results showed that the traditional, SFU and MFU pretreated enzymatic hydrolysis of DCGP followed the First-order kinetic model. Again, the SFU and MFU pretreatments enhanced the enzymatic hydrolysis of DCGP. Compared to traditional enzymatic hydrolysis, the reaction rate constant values were increased by 50.0%, 54.7%, 47.8% and 52.3% for SFU pretreated enzymatic hydrolysis, and 58.0%, 58.5, 53.6% and 54.7% for MFU pretreated enzymatic hydrolysis at 20, 30, 40 and 50 oC respectively. Also, the results showed that the SFU and MFU ultrasound pretreatments of DCGP reduced the thermodynamic parameters which included the activation energy (Ea), enthalpy (ΔH), entropies (ΔS) and Gibbs free energy (ΔG) in enzymatic hydrolysis reaction.

  • effect of a multi Frequency Counter current s type ultrasound pretreatment on the defatted corn germ protein enzymatic hydrolysis ace inhibitory activity and structural characterization
    Food & Function, 2019
    Co-Authors: Abubak Musa, Mohammed A A Gasmalla, Frederick Sarpong, Faisal N Awad, Asif Wali, Yuqing Dua
    Abstract:

    In this work, a defatted corn germ protein (DCGP) was pretreated with single Frequency ultrasound at 20 kHz (SFU) and multi-Frequency ultrasounds (20, 28, 35 and 40 kHz) (MFU). The microstructures, morphology, amino acid content, degree of hydrolysis, protein hydrolysate concentration and angiotensin-converting enzyme (ACE) inhibitory activity of the DCGP hydrolysate were analyzed. The results showed that both SFU and MFU pretreatments increased the ACE inhibitory activity of the DCGP hydrolysate more than that observed for the traditional method. Also, the SFU pretreatment showed the highest ACE inhibitory activity of 54% in comparison with that of the DCGP hydrolysates obtained via the traditional and MFU pretreatment methods. The results of ultraviolet-visible (UV-Vis) spectroscopy, fluorescence spectroscopy, surface hydrophobicity studies, Fourier-transform infrared spectroscopy (FTIR), atomic force microscopy (AFM) and scanning electron microscopy (SEM) confirmed the extent of the changes that occurred in the microstructures and morphology of DCGP pretreated with SFU and MFU. The results also indicated that the hydrophobic amino acid concentration was comparably higher in DCGP pretreated with SFU and MFU than that in the DCG protein isolated via the traditional method.