Rhizophora

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Mohd Fahmi Mohd Yusof - One of the best experts on this subject based on the ideXlab platform.

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

  • measurement of attenuation coefficients and ct numbers of epoxy resin and epoxy based Rhizophora spp particleboards in computed tomography energy range
    Radiation Physics and Chemistry, 2018
    Co-Authors: Marwan Alshipli, Rokiah Hashim, Norlaili Ahmad Kabir, Mohammad Wasef Marashdeh, A A Tajuddin
    Abstract:

    Abstract This study aims to evaluate the attenuation properties of epoxy resin and Rhizophora spp. particleboards bonded with epoxy resin as tissue equivalent phantom materials. The calculated linear and mass attenuation coefficients of epoxy resin and Rhizophora spp. particleboards bonded with three different weight percentages of the epoxy resin (5%, 10% and 15%) were compared with theoretical (XCOM) and experimental measurements of human liver tissue and water at the same energy levels. The 241Am and 109Cd point sources were used to measure the linear and mass attenuation coefficients of the samples at gamma energies; 26.3, 59.5 and 88.0 keV. The computed tomography (CT) scanner was employed to determine the mean attenuation values (CT number) for the fabricated samples and water at CT tube energy 120 kVp. The linear and mass attenuation coefficients of epoxy resin and fabricated Rhizophora spp. particleboard bonded with 15% of epoxy resin provided excellent agreement to the values of XCOM calculated in the human liver tissue and water, respectively. The CT number results showed that the epoxy resin and the Rhizophora spp. particleboard bonded with15% epoxy were in a good agreement with those of human liver tissue and water, respectively. Therefore, the overall attenuation measurements of this study verify the applicability of epoxy resin as a phantom material to mimic the human liver in CT examinations and the epoxy–Rhizophora spp. particleboard fabricated with 15% epoxy resin can be used as a tissue equivalent material corresponding to CT energy range.

  • mass attenuation coefficient of tannin added Rhizophora spp particleboards at 16 59 25 56 kev photons and 137 cs and 60 co gamma energies
    Radiological Physics and Technology, 2017
    Co-Authors: Mohd Fahmi Mohd Yusof, Rokiah Hashim, Sabar Bauk, A A Tajuddin, Puteri Nor Khatijah Abd Hamid, Norriza Mohd Isa, Muhammad Jamal Md Isa
    Abstract:

    The aim of this study was to determine the suitability of tannin-added Rhizophora spp. particleboards as phantom materials in the application of low- and high-energy photons. The tannin-added Rhizophora spp. particleboards and density plug phantoms were created with a target density of 1.0 g/cm3. The elemental composition and effective atomic number of the particleboards were measured using energy dispersive X-ray analysis. The mass attenuation coefficient of the particleboards for low-energy photons were measured using the attenuation of X-ray fluorescence. The mass attenuation coefficients of high-energy photons were measured using the attenuation of 137Cs and 60Co gamma energies. The results were compared to the calculated value of water using XCOM calculations. The results showed that the effective atomic number and mass attenuation coefficients of tannin-added Rhizophora spp. particleboards were similar to those of water, indicating the suitability of tannin-added Rhizophora spp. particleboards as phantom materials for low- and high-energy photons.

  • characterization of tannin added Rhizophora spp particleboards as phantom materials for photon beams
    Industrial Crops and Products, 2017
    Co-Authors: Rokiah Hashim, Mohd Fahmi Mohd Yusof, Sabar Bauk, A A Tajuddin, Othman Sulaiman
    Abstract:

    Abstract The study evaluates the suitability of tannin-added particleboards made of Rhizophora spp. woods as phantom material for photon beams. The particleboards were fabricated at different particle sizes and target density of 1.0 g/cm 3 . The mechanical properties and dimensional stability of the particleboards were evaluated according to Japanese Industrial Standards ( JIS A 5908:2003 ). The microstructure, elemental composition and effective atomic number of the particleboards were studied using Scanning Electron Microscope and Energy Dispersive X-ray Analysis. Computed tomography (CT) images were obtained to determine the CT numbers and density profiles of the particleboards. The results indicated addition of tannin had improved the IB strength and MOR of the particleboards between 5 and 48%. The value of effective atomic number showed good agreement of tannin-added Rhizophora spp. to water with percentage different of 3.7%. The autocondensation of tannin also had improved the compactness of the particleboards. The CT number and density profile of tannin-added Rhizophora spp. were close to water shown by the lower χ 2 of 0.041. The results indicated the suitability of tannin-added Rhizophora spp. particleboards as phantom materials for photon beams.

  • mass attenuation coefficient of binderless pre treated and tannin based Rhizophora spp particleboards using 16 59 25 26 kev photon energy range
    ADVANCING OF NUCLEAR SCIENCE AND ENERGY FOR NATIONAL DEVELOPMENT: Proceedings of the Nuclear Science Technology and Engineering Conference 2014 (NuSTE, 2015
    Co-Authors: Mohd Fahmi Mohd Yusof, Rokiah Hashim, Puteri Nor Khatijah Abdul Hamid, Sabar Bauk, A A Tajuddin
    Abstract:

    The Rhizophora spp. particleboards were fabricated using ≤ 104 µm particle size at three different fabrication methods; binderless, steam pre-treated and tannin-added. The mass attenuation coefficient of Rhizophora spp. particleboards were measured using x-ray fluorescent (XRF) photon from niobium, molybdenum, palladium, silver and tin metal plates that provided photon energy between 16.59 to 25.26 keV. The results were compared to theoretical values for water calculated using photon cross-section database (XCOM).The results showed that all Rhizophora spp. particleboards having mass attenuation coefficient close to calculated XCOM for water. Tannin-added Rizophora spp. particleboard was nearest to calculated XCOM for water with χ2 value of 13.008 followed by binderless Rizophora spp. (25.859) and pre-treated Rizophora spp. (91.941).

  • measurement of mass attenuation coefficients of eremurus Rhizophora spp particleboards for x ray in the 16 63 25 30 kev energy range
    Radiation Physics and Chemistry, 2014
    Co-Authors: Ehsan Taghizadeh Tousi, Rokiah Hashim, Sabar Bauk, M S Jaafar, Ali Abuarra, Khalid Saleh Ali Aldroobi, Amer Mahmoud Aljarrah
    Abstract:

    Abstract The roots of Eremurus spp. were used as a bio-adhesive in the fabrication of Rhizophora spp. particleboards. The mass attenuation coefficients of Eremurus–Rhizophora spp. particleboard of six samples with two different weight percentages of the Eremurus spp. root (6% and 12%) and three various Rhizophora spp. particle sizes (≤149 µm, 149–500 µm and 500–1000 µm) were determined by using X-ray fluorescence (XRF) photons in 16.63 keV and 25.30 keV of the photon energy range. The results were compared with theoretically calculated mass attenuations using the XCOM computer program for younger-age (breast 1: 75% muscle+25% fat), middle-age (breast 2: 50% muscle+50% fat), and old-age (breast 3: 25% muscle+75% fat) breasts. The results indicated that Eremurus–Rhizophora spp. particleboard is the appropriate suitable phantom in the diagnostic energy region. The mass attenuation coefficient in the low weight percentage of the bio-adhesive and the large Rhizophora spp. particle size were found very close to breast 1. Moreover the mass attenuation coefficient of the sample with high weight percentage of the bio-adhesive and small Rhizophora spp. particle size was found very close to water as a standard material phantom. In addition, the viscosity of dissolved Eremurus spp. root in water could be considerably higher than that of formaldehyde-based adhesives, which affects on some properties such as high strength and high binding.

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

  • measurement of attenuation coefficients and ct numbers of epoxy resin and epoxy based Rhizophora spp particleboards in computed tomography energy range
    Radiation Physics and Chemistry, 2018
    Co-Authors: Marwan Alshipli, Rokiah Hashim, Norlaili Ahmad Kabir, Mohammad Wasef Marashdeh, A A Tajuddin
    Abstract:

    Abstract This study aims to evaluate the attenuation properties of epoxy resin and Rhizophora spp. particleboards bonded with epoxy resin as tissue equivalent phantom materials. The calculated linear and mass attenuation coefficients of epoxy resin and Rhizophora spp. particleboards bonded with three different weight percentages of the epoxy resin (5%, 10% and 15%) were compared with theoretical (XCOM) and experimental measurements of human liver tissue and water at the same energy levels. The 241Am and 109Cd point sources were used to measure the linear and mass attenuation coefficients of the samples at gamma energies; 26.3, 59.5 and 88.0 keV. The computed tomography (CT) scanner was employed to determine the mean attenuation values (CT number) for the fabricated samples and water at CT tube energy 120 kVp. The linear and mass attenuation coefficients of epoxy resin and fabricated Rhizophora spp. particleboard bonded with 15% of epoxy resin provided excellent agreement to the values of XCOM calculated in the human liver tissue and water, respectively. The CT number results showed that the epoxy resin and the Rhizophora spp. particleboard bonded with15% epoxy were in a good agreement with those of human liver tissue and water, respectively. Therefore, the overall attenuation measurements of this study verify the applicability of epoxy resin as a phantom material to mimic the human liver in CT examinations and the epoxy–Rhizophora spp. particleboard fabricated with 15% epoxy resin can be used as a tissue equivalent material corresponding to CT energy range.

  • mass attenuation coefficient of tannin added Rhizophora spp particleboards at 16 59 25 56 kev photons and 137 cs and 60 co gamma energies
    Radiological Physics and Technology, 2017
    Co-Authors: Mohd Fahmi Mohd Yusof, Rokiah Hashim, Sabar Bauk, A A Tajuddin, Puteri Nor Khatijah Abd Hamid, Norriza Mohd Isa, Muhammad Jamal Md Isa
    Abstract:

    The aim of this study was to determine the suitability of tannin-added Rhizophora spp. particleboards as phantom materials in the application of low- and high-energy photons. The tannin-added Rhizophora spp. particleboards and density plug phantoms were created with a target density of 1.0 g/cm3. The elemental composition and effective atomic number of the particleboards were measured using energy dispersive X-ray analysis. The mass attenuation coefficient of the particleboards for low-energy photons were measured using the attenuation of X-ray fluorescence. The mass attenuation coefficients of high-energy photons were measured using the attenuation of 137Cs and 60Co gamma energies. The results were compared to the calculated value of water using XCOM calculations. The results showed that the effective atomic number and mass attenuation coefficients of tannin-added Rhizophora spp. particleboards were similar to those of water, indicating the suitability of tannin-added Rhizophora spp. particleboards as phantom materials for low- and high-energy photons.

  • characterization of tannin added Rhizophora spp particleboards as phantom materials for photon beams
    Industrial Crops and Products, 2017
    Co-Authors: Rokiah Hashim, Mohd Fahmi Mohd Yusof, Sabar Bauk, A A Tajuddin, Othman Sulaiman
    Abstract:

    Abstract The study evaluates the suitability of tannin-added particleboards made of Rhizophora spp. woods as phantom material for photon beams. The particleboards were fabricated at different particle sizes and target density of 1.0 g/cm 3 . The mechanical properties and dimensional stability of the particleboards were evaluated according to Japanese Industrial Standards ( JIS A 5908:2003 ). The microstructure, elemental composition and effective atomic number of the particleboards were studied using Scanning Electron Microscope and Energy Dispersive X-ray Analysis. Computed tomography (CT) images were obtained to determine the CT numbers and density profiles of the particleboards. The results indicated addition of tannin had improved the IB strength and MOR of the particleboards between 5 and 48%. The value of effective atomic number showed good agreement of tannin-added Rhizophora spp. to water with percentage different of 3.7%. The autocondensation of tannin also had improved the compactness of the particleboards. The CT number and density profile of tannin-added Rhizophora spp. were close to water shown by the lower χ 2 of 0.041. The results indicated the suitability of tannin-added Rhizophora spp. particleboards as phantom materials for photon beams.

  • mass attenuation coefficient of binderless pre treated and tannin based Rhizophora spp particleboards using 16 59 25 26 kev photon energy range
    ADVANCING OF NUCLEAR SCIENCE AND ENERGY FOR NATIONAL DEVELOPMENT: Proceedings of the Nuclear Science Technology and Engineering Conference 2014 (NuSTE, 2015
    Co-Authors: Mohd Fahmi Mohd Yusof, Rokiah Hashim, Puteri Nor Khatijah Abdul Hamid, Sabar Bauk, A A Tajuddin
    Abstract:

    The Rhizophora spp. particleboards were fabricated using ≤ 104 µm particle size at three different fabrication methods; binderless, steam pre-treated and tannin-added. The mass attenuation coefficient of Rhizophora spp. particleboards were measured using x-ray fluorescent (XRF) photon from niobium, molybdenum, palladium, silver and tin metal plates that provided photon energy between 16.59 to 25.26 keV. The results were compared to theoretical values for water calculated using photon cross-section database (XCOM).The results showed that all Rhizophora spp. particleboards having mass attenuation coefficient close to calculated XCOM for water. Tannin-added Rizophora spp. particleboard was nearest to calculated XCOM for water with χ2 value of 13.008 followed by binderless Rizophora spp. (25.859) and pre-treated Rizophora spp. (91.941).

  • determining the mass attenuation coefficient effective atomic number and electron density of raw wood and binderless particleboards of Rhizophora spp by using monte carlo simulation
    Results in physics, 2015
    Co-Authors: A A Tajuddin, Mohammad Wasef Marashdeh, Ibrahim F Alhamarneh, Eid Mahmoud Eid Abdel Munem, Alawiah Ariffin, Saleh Alomari
    Abstract:

    Abstract Rhizophora spp. wood has the potential to serve as a solid water or tissue equivalent phantom for photon and electron beam dosimetry. In this study, the effective atomic number ( Z eff ) and effective electron density ( N eff ) of raw wood and binderless Rhizophora spp. particleboards in four different particle sizes were determined in the 10–60 keV energy region. The mass attenuation coefficients used in the calculations were obtained using the Monte Carlo N-Particle (MCNP5) simulation code. The MCNP5 calculations of the attenuation parameters for the Rhizophora spp. samples were plotted graphically against photon energy and discussed in terms of their relative differences compared with those of water and breast tissue. Moreover, the validity of the MCNP5 code was examined by comparing the calculated attenuation parameters with the theoretical values obtained by the XCOM program based on the mixture rule. The results indicated that the MCNP5 process can be followed to determine the attenuation of gamma rays with several photon energies in other materials.

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

  • mass attenuation coefficient of tannin added Rhizophora spp particleboards at 16 59 25 56 kev photons and 137 cs and 60 co gamma energies
    Radiological Physics and Technology, 2017
    Co-Authors: Mohd Fahmi Mohd Yusof, Rokiah Hashim, Sabar Bauk, A A Tajuddin, Puteri Nor Khatijah Abd Hamid, Norriza Mohd Isa, Muhammad Jamal Md Isa
    Abstract:

    The aim of this study was to determine the suitability of tannin-added Rhizophora spp. particleboards as phantom materials in the application of low- and high-energy photons. The tannin-added Rhizophora spp. particleboards and density plug phantoms were created with a target density of 1.0 g/cm3. The elemental composition and effective atomic number of the particleboards were measured using energy dispersive X-ray analysis. The mass attenuation coefficient of the particleboards for low-energy photons were measured using the attenuation of X-ray fluorescence. The mass attenuation coefficients of high-energy photons were measured using the attenuation of 137Cs and 60Co gamma energies. The results were compared to the calculated value of water using XCOM calculations. The results showed that the effective atomic number and mass attenuation coefficients of tannin-added Rhizophora spp. particleboards were similar to those of water, indicating the suitability of tannin-added Rhizophora spp. particleboards as phantom materials for low- and high-energy photons.

  • characterization of tannin added Rhizophora spp particleboards as phantom materials for photon beams
    Industrial Crops and Products, 2017
    Co-Authors: Rokiah Hashim, Mohd Fahmi Mohd Yusof, Sabar Bauk, A A Tajuddin, Othman Sulaiman
    Abstract:

    Abstract The study evaluates the suitability of tannin-added particleboards made of Rhizophora spp. woods as phantom material for photon beams. The particleboards were fabricated at different particle sizes and target density of 1.0 g/cm 3 . The mechanical properties and dimensional stability of the particleboards were evaluated according to Japanese Industrial Standards ( JIS A 5908:2003 ). The microstructure, elemental composition and effective atomic number of the particleboards were studied using Scanning Electron Microscope and Energy Dispersive X-ray Analysis. Computed tomography (CT) images were obtained to determine the CT numbers and density profiles of the particleboards. The results indicated addition of tannin had improved the IB strength and MOR of the particleboards between 5 and 48%. The value of effective atomic number showed good agreement of tannin-added Rhizophora spp. to water with percentage different of 3.7%. The autocondensation of tannin also had improved the compactness of the particleboards. The CT number and density profile of tannin-added Rhizophora spp. were close to water shown by the lower χ 2 of 0.041. The results indicated the suitability of tannin-added Rhizophora spp. particleboards as phantom materials for photon beams.

  • mass attenuation coefficient of binderless pre treated and tannin based Rhizophora spp particleboards using 16 59 25 26 kev photon energy range
    ADVANCING OF NUCLEAR SCIENCE AND ENERGY FOR NATIONAL DEVELOPMENT: Proceedings of the Nuclear Science Technology and Engineering Conference 2014 (NuSTE, 2015
    Co-Authors: Mohd Fahmi Mohd Yusof, Rokiah Hashim, Puteri Nor Khatijah Abdul Hamid, Sabar Bauk, A A Tajuddin
    Abstract:

    The Rhizophora spp. particleboards were fabricated using ≤ 104 µm particle size at three different fabrication methods; binderless, steam pre-treated and tannin-added. The mass attenuation coefficient of Rhizophora spp. particleboards were measured using x-ray fluorescent (XRF) photon from niobium, molybdenum, palladium, silver and tin metal plates that provided photon energy between 16.59 to 25.26 keV. The results were compared to theoretical values for water calculated using photon cross-section database (XCOM).The results showed that all Rhizophora spp. particleboards having mass attenuation coefficient close to calculated XCOM for water. Tannin-added Rizophora spp. particleboard was nearest to calculated XCOM for water with χ2 value of 13.008 followed by binderless Rizophora spp. (25.859) and pre-treated Rizophora spp. (91.941).

  • measurement of mass attenuation coefficients of eremurus Rhizophora spp particleboards for x ray in the 16 63 25 30 kev energy range
    Radiation Physics and Chemistry, 2014
    Co-Authors: Ehsan Taghizadeh Tousi, Rokiah Hashim, Sabar Bauk, M S Jaafar, Ali Abuarra, Khalid Saleh Ali Aldroobi, Amer Mahmoud Aljarrah
    Abstract:

    Abstract The roots of Eremurus spp. were used as a bio-adhesive in the fabrication of Rhizophora spp. particleboards. The mass attenuation coefficients of Eremurus–Rhizophora spp. particleboard of six samples with two different weight percentages of the Eremurus spp. root (6% and 12%) and three various Rhizophora spp. particle sizes (≤149 µm, 149–500 µm and 500–1000 µm) were determined by using X-ray fluorescence (XRF) photons in 16.63 keV and 25.30 keV of the photon energy range. The results were compared with theoretically calculated mass attenuations using the XCOM computer program for younger-age (breast 1: 75% muscle+25% fat), middle-age (breast 2: 50% muscle+50% fat), and old-age (breast 3: 25% muscle+75% fat) breasts. The results indicated that Eremurus–Rhizophora spp. particleboard is the appropriate suitable phantom in the diagnostic energy region. The mass attenuation coefficient in the low weight percentage of the bio-adhesive and the large Rhizophora spp. particle size were found very close to breast 1. Moreover the mass attenuation coefficient of the sample with high weight percentage of the bio-adhesive and small Rhizophora spp. particle size was found very close to water as a standard material phantom. In addition, the viscosity of dissolved Eremurus spp. root in water could be considerably higher than that of formaldehyde-based adhesives, which affects on some properties such as high strength and high binding.

  • some properties of particleboards produced from Rhizophora spp as a tissue equivalent phantom material bonded with eremurus spp
    Measurement, 2014
    Co-Authors: Ehsan Taghizadeh Tousi, Rokiah Hashim, Sabar Bauk, M S Jaafar, Ali Abuarra, Baker Ababneh
    Abstract:

    The objective of this study is to evaluate the mechanical and physical properties of the particleboard manufactured from Rhizophora spp. in three particle sizes bonded with powdered Eremurus spp. root as a bio-based adhesive in two adhesive treatment levels. The samples acquired high internal bond strength values when the Rhizphora spp. particle size was reduced and the adhesive treatment level was increased. Dimensional stability normally increased with the reduced Rhizophora spp. wood particle size. The hydrophilic property of Eremurus spp. indicates that dimensional stability also increased with decreased adhesive treatment level. However, dimensional stability is affected by the adhesive treatment level when the wood particle size is smaller than that of the adhesive particle. The density distributions of the fabricated particleboards were evaluated using Surfer8 software, which showed significant homogeneity in all samples. The microstructures of the fabricated particleboards were investigated by field emission scanning electron microscopy, which refers to the better surrounding adhesive with bigger particles than Rhizophora spp. particles. This study indicates the potential of Eremurus spp. root as a bio-adhesive, which improved the characterization of Rhizophora spp. particleboard.

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

  • efektifitas ekstrak daun Rhizophora mucronata dalam menghambat pertumbuhan aeromonas salmonicida dan vibrio harveyi
    e-Jurnal Rekayasa dan Teknologi Budidaya Perairan, 2012
    Co-Authors: Anisa Suciati
    Abstract:

    Infectious diseases lead to reducing aquaculture productivity. The using of chemical antibiotic was avoided since their negative effect was known, i.e. created resistant bacteria, contaminating environment and fish meat. The purpose of the research is to find the active compound from Rhizophora mucronata leaf and their activity to inhibit pathogenic bacteria Aeromonas salmonicida and Vibrio harveyi . Extraction procedure conducted by using maceration technique to extract type of mangrove leaf (tip, main leaf, dried leaf), and organic solvent (hexan, ethylacetate, methanol). The result of this research showed that active compound from Rhizopra mucronata give negative response inhibiting Aeromonas salmonicida while postif to Vibrio harveyi . The tip of Rhizophora muncronata leaf is more effective to inhibit pathogenic bacteria, and ethylacetate is the best solvent to extract Rhizophora muncronata leaf. Lethal concentration (LC-50) from Rhizopra macronata is 200 ppm.

  • efektifitas ekstrak daun Rhizophora mucronata dalam menghambat pertumbuhan aeromonas salmonicida dan vibrio harveyi efectivity of Rhizophora mucronata leaf extract to inhibit aeromonas salmonicida and vibrio harveyi
    2012
    Co-Authors: Anisa Suciati
    Abstract:

    Infectious diseases lead to reducing aquaculture productivity. The using of chemical antibiotic was avoided since their negative effect was known, i.e. created resistant bacteria, contaminating environment and fish meat. The purpose of the research is to find the active compound from Rhizophora mucronata leaf and their activity to inhibit pathogenic bacteria Aeromonas salmonicida and Vibrio harveyi. Extraction procedure conducted by using maceration technique to extract type of mangrove leaf (tip, main leaf, dried leaf), and organic solvent (hexan, ethylacetate, methanol). The result of this research showed that active compound from Rhizopra mucronata give negative response inhibiting Aeromonas salmonicida while postif to Vibrio harveyi . The tip of Rhizophora muncronata leaf is more effective to inhibit pathogenic bacteria, and ethylacetate is the best solvent to extract Rhizophora muncronata leaf. Lethal concentration (LC-50) from Rhizopra macronata is 200 ppm.