Displaying publications 1 - 20 of 302 in total

Abstract:
Sort:
  1. Editorial: mixed soluble fibre in chronic constipation - something new? Authors' reply
    Erdogan A, Rao SS, Thiruvaiyaru D, Lee YY, Coss Adame E, Valestin J, et al.
    Aliment Pharmacol Ther, 2016 08;44(3):303.
    PMID: 27375096 DOI: 10.1111/apt.13688
    Matched MeSH terms: Dietary Fiber*
  2. Fulltext Towards 5G: A Photonic Based Millimeter Wave Signal Generation for Applying in 5G Access Fronthaul
    Alavi SE, Soltanian MR, Amiri IS, Khalily M, Supa'at AS, Ahmad H
    Sci Rep, 2016 Jan 27;6:19891.
    PMID: 26814621 DOI: 10.1038/srep19891
    5G communications require a multi Gb/s data transmission in its small cells. For this purpose millimeter wave (mm-wave) RF signals are the best solutions to be utilized for high speed data transmission. Generation of these high frequency RF signals is challenging in electrical domain therefore photonic generation of these signals is more studied. In this work, a photonic based simple and robust method for generating millimeter waves applicable in 5G access fronthaul is presented. Besides generating of the mm-wave signal in the 60 GHz frequency band the radio over fiber (RoF) system for transmission of orthogonal frequency division multiplexing (OFDM) with 5 GHz bandwidth is presented. For the purpose of wireless transmission for 5G application the required antenna is designed and developed. The total system performance in one small cell was studied and the error vector magnitude (EVM) of the system was evaluated.
    Matched MeSH terms: Dietary Fiber
  3. Functional properties and characterization of dietary fiber from Mangifera pajang Kort. fruit pulp
    Al-Sheraji SH, Ismail A, Manap MY, Mustafa S, Yusof RM, Hassan FA
    J Agric Food Chem, 2011 Apr 27;59(8):3980-5.
    PMID: 21388187 DOI: 10.1021/jf103956g
    A dried high fiber product from bambangan (Mangifera pajang Kort.) fruit pulp was prepared and evaluated for proximate composition, functional properties, and soluble and insoluble dietary fiber composition. Mangifera pajang fibrous (MPF) consisted of 4.7% moisture, 0.8% fat, 4% protein, and 30 mg total polyphenol per g of dry sample, and 9, 79 and 88% soluble, insoluble and total dietary fiber, respectively. Water holding capacity, oil holding capacity, swelling, and solubility were found to be 9 g/g dry sample, 4 g/g dry sample, 16 mL/g dry sample, and 11%, respectively. The glucose dialysis retardation index of MPF was approximately double that of cellulose fiber. Soluble dietary fiber contained mannose, arabinose, glucose, rhamnose, erythrose, galactose, xylose, and fucose at 1.51, 0.72, 0.39, 0.16, 0.14, 0.05, 0.04, and 0.01%, respectively, with 5.8% uronic acid, while insoluble dietary fiber was composed of arabinose (18.47%), glucose (4.46%), mannose (3.15%), rhamnose (1.65%), galactose (1.20%), xylose (0.99%), and fucose (0.26%) with 15.5% uronic acid and 33.1% klason lignin. These characteristics indicate that MPF is a rich source of dietary fiber and has physicochemical properties which make it suitable as an added ingredient in various food products and/or dietetic, low-calorie high-fiber foods to enhance their nutraceutical properties.
    Matched MeSH terms: Dietary Fiber/analysis; Dietary Fiber/pharmacology*
  4. Linear cavity Brillouin fiber laser with improved characteristics
    Shirazi MR, Harun SW, Biglary M, Ahmad H
    Opt Lett, 2008 Apr 15;33(8):770-2.
    PMID: 18414527
    A configuration for linear cavity Brillouin fiber laser (BFL) generation is demonstrated using a standard single-mode fiber, two optical circulators, a 3 dB coupler, and a 95/5 coupler to allow high efficiency. With a Brillouin pump (BP) power of 13 dBm, the laser peak power is 12.3 dB higher than a conventional linear cavity BFL at an upshifted wavelength of 0.086 nm from the BP wavelength. In addition, it is revealed that the BFL peak power can be higher than the transmitted BP peak power when the BP power exceeds the second Brillouin Stokes threshold power.
    Matched MeSH terms: Dietary Fiber
  5. Effects of different Raman pumping schemes on stimulated Brillouin scattering in a linear cavity
    Shirazi MR, Biglary M, Harun SW, Thambiratnam K, Ahmad H
    Appl Opt, 2008 Jun 10;47(17):3088-91.
    PMID: 18545279
    The effects of backward, forward, and bidirectional Raman pumping schemes on stimulated Brillouin scattering (SBS) is investigated in this study. By using a linear cavity, we utilize residual Brillouin pump (BP) and Raman pump (RP) power after each transmission through a 25 km single-mode fiber (SMF) used as a gain medium. The SBS threshold power is reduced in the forward, backward, and bidirectional Raman pumping schemes by 2.5, 1.75, and 2.75 dB, respectively when the 1480 nm RP power is fixed at 150 mW and the BP wavelength is 1580 nm. Surprisingly, it is revealed that the SBS threshold reduction depends strongly and solely on Raman gain and it is independent of the Raman pumping schemes. In addition, the effect of Raman amplification on SBS is more effective at the SBS threshold, especially in the bidirectional and forward schemes.
    Matched MeSH terms: Dietary Fiber
  6. Compound parabolic tapered fiber for fiber coupling with a highly divergent source
    Chen LC, Low AL, Chien SF
    Appl Opt, 2004 Nov 10;43(32):5923-5.
    PMID: 15587718
    A novel fiber tapering shape, which is based on compound parabolic geometry, is proposed to increase the acceptance angle of a compound parabolic concentrator. The proposed design is described by use of ray optics on a step-index multimode fiber.
    Matched MeSH terms: Dietary Fiber
  7. Fulltext Variable-gain erbium-doped fibre amplifier for loss variation studies in a transmission span
    Mahdi, M.A., Sheih, S.J., Al-Mansoori, M.H., Zamzuri, A.K., Adikan, F.R.M.
    ASM Science Journal, 2008;2(2):115-122.
    MyJurnal
    A four-stage erbium-doped fibre amplifier with the gain bandwidth of 35 nm is demonstrated. The amplifier was designed to include a dispersion compensating module to compensate the accumulated dispersion by signals. The amplifier design permited some dynamic features such as the amplifier’s gain could be adjusted from 15 dB to 30 dB by varying the input signal power from –26 dBm to 8 dBm. The maximum output power of 23 dBm was obtained with a maximum allowable gain flatness of 1.5 dB.
    Matched MeSH terms: Dietary Fiber
  8. Fulltext Aspect of fatigue analysis of composite materials: a review
    Suriani, M.J., Aidy Ali, Sapuan, S.M., Khalina, A.
    Pertanika Journal of Science & Technology, 2013;21(1):1-14.
    MyJurnal
    This paper reviewed the aspect of fatigue approaches and analysis in a fibre reinforced composite materials which have been done by researchers worldwide. The aim of this review is to provide a better picture on analytical approaches that are presently available for predicting fatigue life in composite materials. This review also proposes a new interpretation of available theories and identifies area in fatigue of natural fibre reinforced composite materials. Thus, it was concluded there are still very limited studies on fatigue analysis of natural fibre reinforced composite materials, especially using non-destructive technique (NDT) methods and a new mathematical modelling on fatigue should be formulated.
    Matched MeSH terms: Dietary Fiber
  9. Fulltext Ballistic impact performance of the layered and laminated composites: a reviews
    Kannan Rassiah, Megat Ahmad, M.M.H, Aidy Ali
    Pertanika Journal of Science & Technology, 2015;23(2):177-185.
    MyJurnal
    This paper presents an overview topic of layered and laminated fibre composites. The review presents an investigation on the effect of varying the properties of fibre and the matrix of layered and laminated composites and identifies the fundamental parameters determining ballistic impact protection. The advantages of layered and laminated reinforced composites with different thicknesses for further enhancing ballistic penetration resistance of the laminated fibre composite have been reviewed. Lamination of multiple layers of composite material can give better ballistic performance.
    Matched MeSH terms: Dietary Fiber
  10. Properties and characteristics of nanocrystalline cellulose isolated from olive fiber
    Kian LK, Saba N, Jawaid M, Alothman OY, Fouad H
    Carbohydr Polym, 2020 Aug 01;241:116423.
    PMID: 32507177 DOI: 10.1016/j.carbpol.2020.116423
    Olive fiber is a sustainable material as well as alternative biomass for extraction of nanocrystalline cellulose (NCC), which has been widely applied in various industries. In the present study, ONC-I, ONC-II, and ONC-III were extracted from olive stem fiber at different hydrolysis reaction times of 30 min, 45 min, and 60 min, respectively. The nanoparticle size was found gradually reducing from ONC-I (11.35 nm width, 168.28 nm length) to ONC-III (6.92 nm width, 124.16 nm length) due to the disintegration of cellulose fibrils. ONC-II and ONC-III possessed highly pure cellulose compartments and enhanced crystals structure. This study also showed that rigidity increased from ONC-I to ONC-II. ONC-III showed the highest crystallinity of 83.1 %, endowing it as a potentially reliable load-bearing agent. Moreover, ONC-III exhibited highest stable heat resistance among the chemically-isolated nanocellulose. We concluded that olive NCC could be promising materials for a variety of industrial applications in various fields.
    Matched MeSH terms: Dietary Fiber/analysis*
  11. Fulltext Recommended nutrient intake for dietary fibre: bar set too high for Malaysians?
    Ng TKW, Chow SS, Chan LP, Lee CY, Lim SQ
    Malays J Nutr, 2010 Aug;16(2):271-80.
    PMID: 22691932 MyJurnal
    This article presents findings from three separate data sets on food consumption in apparently healthy Malaysian adult males and females aged 22-60 years, and secondary data extracted from the Malaysian Adult Nutrition Survey (MANS) 2003. Assessment of food intake by 24-hour recall or the food diary method and use of the nutrient calculator- DietPLUS- to quantify intake of macronutrients and dietary fibre (DF) in the primary data, revealed low mean DF intakes of 10.7±1.0 g/day (Course participants, n=52), 15.6 ±1.2 (University sample, n=103), and 16.1±6.1 (Research Institute staff, n=25). An alarmingly high proportion of subjects (75 to 95%) in these three data sets did not meet the national population intake goal of 20-30 g DF/day. A list of 39 food items which contain fibre, extracted from the MANS 2003 report as being average amounts consumed daily by each Malaysian adult, provided 19.2 g DF which meant that >50% of Malaysian adults consumed less than the recommended DF intake of 20-30 g/day. This large deficit of actual intake versus recommended intakes is not new and is also observed in developed western nations. What is of great concern is that the preliminary findings presented in this article indicate that the national population goal of 20-30 g DF/day may be beyond the habitual diets of the majority of Malaysians. Appropriately, the authors propose the inclusion of a daily minimum requirement for DF intake in the Malaysian Dietary Guidelines, which would somewhat mimic the Malaysian Dietary Guidelines 1999 for dietary fat, as well as the stand taken by the Scientific Advisory Committee on Nutrition (SACN) of the United Kingdom. This minimum requirement, if agreed to, should not be higher than the 16 g DF or so provided by the hypothetical 'high-fibre' healthy diet exemplified in this article.
    Study name: Malaysian Adult Nutrition Survey (MANS-2003)
    Matched MeSH terms: Dietary Fiber*
  12. Dietary fiber and risk of inflammatory bowel disease: fact or hype?
    Lee YY, Yu S, Khurana S, Rao SS
    Gastroenterology, 2014 Apr;146(4):1133-4.
    PMID: 24576735 DOI: 10.1053/j.gastro.2013.12.043
    Matched MeSH terms: Dietary Fiber/administration & dosage*; Dietary Fiber/therapeutic use*
  13. The effect of fermentation and addition of vegetable oil on resistant starch formation in wholegrain breads
    Buddrick O, Jones OAH, Hughes JG, Kong I, Small DM
    Food Chem, 2015 Aug 01;180:181-185.
    PMID: 25766816 DOI: 10.1016/j.foodchem.2015.02.044
    Resistant starch has potential health benefits but the factors affecting its formation in bread and baked products are not well studied. Here, the formation of resistant starch in wholemeal bread products was evaluated in relation to the processing conditions including fermentation time, temperature and the inclusion of palm oil as a vitamin source. The effects of each the factor were assessed using a full factorial design. The impact on final starch content of traditional sourdough fermentation of wholemeal rye bread, as well as the bulk fermentation process of wheat and wheat/oat blends of wholemeal bread, was also assessed by enzyme assay. Palm oil content was found to have a significant effect on the formation of resistant starch in all of the breads while fermentation time and temperature had no significant impact. Sourdough fermentation of rye bread was found to have a greater impact on resistant starch formation than bulk fermentation of wheat and wheat blend breads, most likely due the increased organic acid content of the sourdough process.
    Matched MeSH terms: Dietary Fiber/analysis*
  14. The phytochemical analysis and pharmacological potentials of husk and straw as paddy waste products
    Murtey MD, Seeni A
    J Sci Food Agric, 2020 Sep;100(12):4347-4352.
    PMID: 32248531 DOI: 10.1002/jsfa.10406
    Rice serves as a staple food for one-half of the global population. However, rice production, particularly the rice milling process, results in a substantial amount of paddy waste products (e.g. bran, husk and straw) annually. Because the potentials of bran have been extensively explored in prior studies, the present review focuses exclusively on the phytochemical analysis and pharmacological potentials of husk and straw. This comprehensive review establishes a solid foundation for promoting husk and straw as medicinal substances given their promising pharmacological potentials as bioactive compound sources with therapeutic functions. © 2020 Society of Chemical Industry.
    Matched MeSH terms: Dietary Fiber/analysis
  15. Renal ACE2 (Angiotensin-Converting Enzyme 2) Expression Is Modulated by Dietary Fiber Intake, Gut Microbiota, and Their Metabolites
    Snelson M, R Muralitharan R, Dinakis E, Nakai M, Jama HA, Shihata WA, et al.
    Hypertension, 2021 06;77(6):e53-e55.
    PMID: 33866801 DOI: 10.1161/HYPERTENSIONAHA.121.17039
    Matched MeSH terms: Dietary Fiber*
  16. Isolation, purification and characterization of β-glucan from cereals - A review
    Sujithra S, Arthanareeswaran G, Ismail AF, Taweepreda W
    Int J Biol Macromol, 2024 Jan;256(Pt 1):128255.
    PMID: 37984576 DOI: 10.1016/j.ijbiomac.2023.128255
    β-glucans are soluble fibers found in cereal compounds, including barley, oats etc., as an active component. They are used as a dietary fiber to treat cholesterol, diabetes and cardiovascular diseases. These polysaccharides are important because they can provide many therapeutic benefits related to their biological activity in human like inhibiting tumour growth, anti-inflammatory action, etc. All these activities were usually attached to their molecular weight, structure and degree of branching. The present manuscript reviews the background of β-glucan, its characterization techniques, the possible ways to extract β-glucan and mainly focuses on membrane-based purification techniques. The β-glucan separation methods using polymeric membranes, their operational characteristics, purification methods which may yield pure or crude β-glucan and structural analysis methods were also discussed. Future direction in research and development related to β-glucan recovery from cereal were also offered.
    Matched MeSH terms: Dietary Fiber/analysis
  17. Fractionation and physicochemical characterization of dietary fiber of kenaf (Hibiscus cannabinus L.) seed
    Nevara GA, Muhammad SKS, Zawawi N, Mustapha NA, Karim R
    J Sci Food Agric, 2024 Apr;104(6):3216-3227.
    PMID: 38072678 DOI: 10.1002/jsfa.13208
    BACKGROUND: Kenaf seeds are underutilized kenaf plant by-products, containing essential nutrients including dietary fiber (DF), which can be potentially utilized as food ingredients. The present study aimed to evaluate the physicochemical characteristics of kenaf seed fiber fractions extracted from kenaf seed.

    RESULTS: Defatted kenaf seed powder yielded four DF fractions: alkali-soluble hemicellulose (146.4 g kg-1 ), calcium-bound pectin (10.3 g kg-1 ) and acid-soluble pectin (25.4 g kg-1 ) made up the soluble fibre fraction, whereas cellulose (202.2 g kg-1 ) comprised the insoluble fraction. All fractions were evaluated for their physicochemical properties. The DF fractions contained glucose, mannose, xylose and arabinose, and a small amount of uronic acid (1.2-2.7 g kg-1 ). The isolated pectin fractions had a low degree of esterification (14-30%). All the isolated DF fractions had high average molecular weights ranging from 0.3 to 4.3 × 106 g mol-1 . X-ray diffractogram analysis revealed that the fractions consisted mainly of an amorphous structure with a relative crystallinity ranging from 31.6% to 44.1%. The Fourier-transform infrared spectroscopy spectrum of kenaf seed and its DF fractions showed typical absorption of polysaccharides, with the presence of hydroxyl, carboxyl, acetyl and methyl groups. Scanning electron microscopy analysis demonstrated that the raw material with the rigid structure resulted in soluble and insoluble DF fractions with more fragile and fibrous appearances, respectively. The soluble DF demonstrated greater flowability and compressibility than the insoluble fractions.

    CONCLUSION: These findings provide novel information on the DF fractions of kenaf seeds, which could be used as a potential new DF for the food industry. © 2023 Society of Chemical Industry.

    Matched MeSH terms: Dietary Fiber/analysis
  18. Fulltext Functional properties of roselle (Hibiscus sabdariffa L.) seed and its application as bakery product
    Nyam KL, Leao SY, Tan CP, Long K
    J Food Sci Technol, 2014 Dec;51(12):3830-7.
    PMID: 25477650 DOI: 10.1007/s13197-012-0902-x
    Roselle (Hibiscus sabdariffa L.) seed is a valuable food resource as it has an excellent source of dietary fibre. Therefore, this study examined the functional properties of roselle seeds. Replacement of cookie flour with roselle seed powder at levels of 0-30 % was investigated for its effect on functional and nutritional properties of cookies. Among the four formulations cookies, the most preferred by panelists was 20 % roselle seed powder cookie (F3), followed by 10 % roselle seed powder cookie (F2) and 30 % roselle seed powder cookie (F4). The least preferred formulation among all was control cookie (F1). Cookie with 20 % roselle seed powder added showed higher content of total dietary fibre (5.6 g/100 g) as compared with control cookie (0.90 g/100 g). Besides that, cookies incorporated with roselle seed powder exhibited improved antioxidant properties. Thus, roselle seed powder can be used as a dietary fibre source and developed as a functional ingredient in food products.
    Matched MeSH terms: Dietary Fiber
  19. Fulltext Temperature-insensitive bend sensor using entirely centered Erbium doping in the fiber core
    Ahmad H, Zulkifli MZ, Muhammad FD, Samangun JM, Abdul-Rashid HA, Harun SW
    Sensors (Basel), 2013;13(7):9536-46.
    PMID: 23881146 DOI: 10.3390/s130709536
    A fiber based bend sensor using a uniquely designed Bend-Sensitive Erbium Doped Fiber (BSEDF) is proposed and demonstrated. The BSEDF has two core regions, namely an undoped outer region with a diameter of about 9.38 μm encompassing a doped, inner core region with a diameter of 4.00 μm. The doped core region has about 400 ppm of an Er2O3 dopant. Pumping the BSEDF with a conventional 980 nm laser diode gives an Amplified Spontaneous Emission (ASE) spectrum spanning from 1,510 nm to over 1,560 nm at the output power level of about -58 dBm. The ASE spectrum has a peak power of -52 dBm at a central wavelength of 1,533 nm when not spooled. Spooling the BSEDF with diameters of 10 cm to 2 cm yields decreasing peak powers from -57.0 dBm to -61.8 dBm, while the central wavelength remains unchanged. The output is highly stable over time, with a low temperature sensitivity of around ~0.005 dBm/°C, thus allowing for the development of a highly stable sensor system based in the change of the peak power alone.
    Matched MeSH terms: Dietary Fiber
  20. Double Brillouin frequency shift through circulation of odd-order Stokes signal
    Shee YG, Al-Mansoori MH, Ismail A, Hitam S, Mahdi MA
    Appl Opt, 2010 Jul 10;49(20):3956-9.
    PMID: 20648173 DOI: 10.1364/AO.49.003956
    We demonstrate a simple configuration for generating a double Brillouin frequency shift through the circulation of an odd-order Brillouin Stokes signal. It is operated based on cascaded Brillouin scattering in single-mode optical fibers that behave as the Brillouin gain media. A four-port circulator is incorporated into the setup to circulate the odd-order Brillouin Stokes signal in the fiber. It thus initiates a higher order Brillouin Stokes signal, which is double Brillouin frequency downshifted from the input signal. For the 5 km long fiber, the Brillouin pump power at 23 mW gives a clean output spectrum with 30 dB sideband suppression ratio. The output signal is 0.174 nm or approximately 21.7 GHz downshifted from the input signal.
    Matched MeSH terms: Dietary Fiber
Related Terms
Filters
Contact Us

Please provide feedback to Administrator (afdal@afpm.org.my)

External Links