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    Wyświetlanie 1-4 z 4
    Tytuł:
    Extraction of Tannic Acid from Kenaf Bast Fibre using Ultrasonic Assisted Extraction
    Autorzy:
    Mohamad, Mardawani
    Ibrahim, H. A.
    Nasir, M. F. M.
    Mohidem, Nur Atikah
    Shoparwe, N. F.
    Teo, Pao Ter
    Masri, Mohamad Najmi
    Irfan, Abd Rahim
    Powiązania:
    https://bibliotekanauki.pl/articles/2134102.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ultrasonic assisted extraction
    UAE
    sonication time
    duty cycle
    extraction process
    kenaf bast fibre
    Opis:
    Tannic acid or tannin, type of phenolic compound contains in kenaf bast fibre. Conventional extraction has certain limitations in terms of time, energy, and solvent consumption. Ultrasound assisted extraction (UAE) can extract bioactive components in shorter time, low temperature, with lesser energy and solvent requirement. UAE as alternative extraction technique is better equipped to retain the functionality of the bioactive compounds. In this study, the conditions for ultrasound assisted extraction (UAE) of tannic acid from kenaf bast fibre by assessing the effect of sonication time and different duty cycles were optimized. The use of ultrasound to extract tannic acid from kenaf bast fiber was evaluated. Ultrasound-assisted extraction (UAE) was carried out using ethanol as solvent to intensify the extraction efficacy. Phytochemical screening was conducted to identify the presence of tannic acid in extracts. The extracts then were analyzed using High-Performance Liquid Chromatography (HPLC) and Scanning Electron Microscopy (SEM). It was found that 0.2429 mg/mL of tannic acid was obtained under the extraction conditions of extraction temperature of 40℃, sonication time of 20 minutes and duty cycle of 50%. From SEM analysis, it was found that the raw sample demonstrated rough surface and no porous but kenaf bast fibre display smoother surface with less impurities and few pores appeared after the extraction process using UAE. These results indicate that ultrasound-assisted extraction is an efficient method for extracting tannic acid from kenaf bast fibre with the advantages of lower extraction time and higher extraction yield.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 3; 1061--1066
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of thermal cycling on the tensile behavior of Cf/Al fiber metal laminates
    Autorzy:
    Noor, M. F.
    Pasha, R. A.
    Wakeel, A.
    Nasir, M. A
    Bilal, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/102771.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    composite material
    aluminum
    anodizing process
    carbon fiber
    thermal cycling
    tensile strength
    Opis:
    The objective of this research work was to estimate the effect of thermal cycling on the tensile behavior of CARALL composites. Fiber metal laminates (FMLs), based on 2D woven carbon fabric and 2024-T3 Alclad aluminum alloy sheet were manufactured by pressure molding technique followed by hand layup method. Before fabrication, aluminum sheets were anodized with phosphoric acid to produce a micro porous alumina layer on surface. This microporous layer is beneficial to produce a strong bond between the metal and fiber surfaces in FMLs. The effect of thermal cycling (-65 to +70ºC) on the tensile behavior of Cf/Al based FML was studied. Tensile strength was increased after 10 thermal cycles, but it was decreased slightly to some extent after 30 and 50 thermal cycles. Tensile modulus also show similar behavior as that of tensile strength.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 3; 80-86
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular detection and therapeutic study of Trypanosoma brucei evansi from naturally infected horses in Punjab, Pakistan
    Autorzy:
    Zahoor, J.
    Kashif, M.
    Nasir, A.
    Bakhsh, M.
    Qamar, M.F.
    Sikandar, A.
    Rehman, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539325.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    equines
    prevalence
    Trypanosome brucei evansi
    therapeutic trial
    horses
    Opis:
    Trypanosomiasis is one of the severe pathogenic infections, caused by several Trypanosoma species, affecting both animals and humans, causing substantial economic losses and severe illness. The objective of this study was to determine the molecular diagnosis and the risk factors associated with trypanosomiasis in District Jhang, Punjab, Pakistan. For this purpose, blood samples were randomly collected from 200 horses. A predesigned questionnaire was used to collect data on risk factors before the sample collection. The microscopy examination through Giemsa staining, formol gel test and PCR techniques were used to find the prevalence. The prevalence was recorded as 22.5% with microscopy examination, 21% through formol gel test and 15.5% with PCR based results. Analysis of risk factors associated with Trypanosoma brucei evansi occurrence was carried out using Chi-square test. It showed the prevalence of Trypanosoma brucei evansi was significantly (p<0.05) associated with sex, age, rearing purpose and body condition whereas non-significantly (p>0.05) with insects control practices. This study supports the idea that PCR is a sensitive, robust and more reliable technique to diagnose trypanosomiasis. It was concluded that Trypanosoma brucei evansi is widely prevalent in Jhang (Pakistan), highlighting a dire need to develop control strategies and education programmes to control this disease in developing countries.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 3; 429-435
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of Sesame Oil from Artificial Wastewater Applying Fenton Process and Comparing It with Actual Wastewater
    Autorzy:
    Nasir, Mohsin J.
    Kadhum, Zaid F.
    Kariem, Nagham O.
    Jasim, Zaid M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2202107.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    sesame oil
    wastewater
    fenton
    technique
    efficiency
    Opis:
    In this research the removal of sesame oil from aritifical water by Fenton process technique was investigated. The results of removal efficiency were compared with actual wastewater. Effect of time, pH, mixing speed, temperature, oil content were investigated to find the perfect circumstances. The conducted experiments revealed that the optimal conditions for this process were 160 minutes of reaction time in an acidic medium where pH was equal to 3.5, temperature was discovered to be 25 °C, the optimal mixing speed was at 500 rpm, and the Sesame oil concentration amounted to 1500 mg/l. Applying the optimal conditions for this processing, the results of compersion showed the sesame oil had a removal efficiency of 95% for the artificial wastewater in which the concentration decreased from 12800 to 68 mg/l, while the Fenton method was used to treat an actual sample of wastewater the removal efficiency is found to be 87%.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 10; 248--254
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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