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| 1 | Fabrication and characterization of affordable hydrophobic ceramic hollow fibre membrane for contacting processes显示文摘Affordable hydrophobic hollow fibre membranes were prepared using kaolin and alumina based ceramic powders via a combined phase inversion and sintering technique,followed by a grafting with fluoroalkylsilane(FAS).The crux of the matter in this paper is to study the changes in the properties of the hollow fibre membranes(gas permeation,mechanical strength,pore size,porosity,tortuosity,morphology,and contact angle)by the addition of alumina(Al2O3)to the pure kaolin with mono or multiparticle sizes.By varying the overall loading and particle size of alumina addition,different morphologies of the membranes were obtained due to the differences in the path lengths during phase inversion process for each solvent and nonsolvent exchange.The successful grafting with FAS was evidenced by the increase in contact angle from nearly equal to zero degree before grafting to 140°after grafting.Kaolin-alumina-4,one of the hollow fibres fabricated in this work,achieved a mean pore size of 0.25μm with the bending strength of 96.4 MPa and high nitrogen permeance of 2.3×10^(-5) mol·m^(-2)·Pa^(-1)·s^(-1),which makes the hollow fibre most suitable for the membrane contactor application. | Mohammed Abdulmunem ABDULHAMEED Mohd Hafiz Dzarfan OTHMAN Haider Nadhom Azziz Al JODA Ahmad Fauzi ISMAIL Takeshi MATSUURA Zawati HARUN Mukhlis A.RAHMAN Mohd Hafiz PUTEH Juhana JAAFAR | 2017 | Journal of Advanced Ceramics2017，6，4： | 3 |
| 2 | High resolution facies architecture and digital outcrop modeling of the Sandakan formation sandstone reservoir, Borneo:Implications for reservoir characterization and flow simulation显示文摘Advances in photogrammetry have eased the acquisition of high-resolution digital information from outcrops, enabling faster, non-destructive data capturing and improved reservoir modeling. Geocellular models for flow dynamics with in the virtual outcrop in siliciclastic deposits at different sets of sandstone facies architecture remain, however, a challenge. Digital maps of bedding, lithological contrast, spatial-temporal variations of bedding and permeability characteristics make it more easy to understand flow tortuosity in a particular architecture. An ability to precisely model these properties can improve reservoir characterization and flow modeling at different scales. Here we demonstrate the construction of realistic 2 D sandstone facies based models for a pragmatic simulation of flow dynamics using a combination of digital point clouds dataset acquired from LiDAR and field investigation of the Sandakan Formation, Sabah, Borneo.Additionally, we present methods for enhancing the accuracy of outcrop digital datasets for producing high resolution flow simulation. A well-exposed outcrop from the Sandakan Formation, Sabah, northwest Borneo having a lateral extent of 750 m was chosen in order to implement our research approach. Sandstone facies and its connectivity are well constrained by outcrop observations, data from air-permeability measurements, bilinear interpolation of permeability, grid construction and water vector analysis for flow dynamics.These proportions were then enumerated in terms of static digital outcrop model(DOM) and facies model based on sandstone facies bedding characteristics. Flow simulation of water vector analysis through each of the four sandstone facies types show persistent spatial correlation of permeability that align with either cross-bedded orientation or straight with more dispersion high quality sandstone(porosity 21.25%-41.2%and permeability 1265.20-5986.25 mD) and moderate quality sandstone(porosity 10.44%-28.75% and permeability 21.44-1023.33 mD). Whereas, in more heterolithic sandstone(wavy-to flaser-bedded and bioturbated sandstone), lateral variations in permeability show spatially non-correlated patterns over centimeters to tens of meters with mostly of low quality sandstone(porosity 3.4%-12.31% and permeability < 1 mD to 3.21 mD). These variations reflect the lateral juxtaposition in flow dynamics. It has also been resulted that the vertical connectivity and heterogeneities in terms of flow are mostly pragmatic due to the interconnected sandstone rather than the quality of sandstone. | Numair A.Siddiqui Mu.Ramkumar Abdul Hadi A.Rahman Manoj J.Mathew M.Santosh Chow W.Sum David Menier | 2019 | Geoscience Frontiers2019，10，3： | 3 |
| 3 | Zika virus infection—do they also endanger male fertility?显示文摘Zika virus(ZIKV)is a mosquito-borne flavivirus,first discovered in the 1940s.ZIKV was originally limited to sporadic cases in Africa and Asia,until the Brazil ZIKV incidences in 2015,when it rapidly spread throughout the Americas.Usually ZIKV infections are subclinical or characterized by mild febrile illness,but they may also induce neurological complications,including the rare Guillain-Barrésyndrome in adults,and congenital anomalies, | Nafis A.Rahman Ilpo Huhtaniemi | 2017 | Science China(Life Sciences)2017，60，3： | 2 |
| 4 | Cattle behaviour classification from collar, halter, and ear tag sensors显示文摘In this paper,we summarise the outcome of a set of experiments aimed at classifying cattle behaviour based on sensor data.Each animal carried sensors generating time series accelerometer data placed on a collar on the neck at the back of the head,on a halter positioned at the side of the head behind the mouth,or on the ear using a tag.The purpose of the study was to determine how sensor data from different placement can classify a range of typical cattle behaviours.Data were collected and animal behaviours(grazing,standing or ruminating)were observed over a common time frame.Statistical features were computed from the sensor data and machine learning algorithms were trained to classify each behaviour.Classification accuracies were computed on separate independent test sets.The analysis based on behaviour classification experiments revealed that different sensor placement can achieve good classification accuracy if the feature space(representing motion patterns)between the training and test animal is similar.The paper will discuss these analyses in detail and can act as a guide for future studies. | A.Rahman D.V.Smith B.Little A.B.Ingham P.L.Greenwood G.J.Bishop-Hurley | 2018 | Information Processing in Agriculture2018，5，1： | 2 |
| 5 | Nigral dopaminergic neuron replenishment in adult mice through VE-cadherin-expressing neural progenitor cells显示文摘The function of dopaminergic neurons in the substantia nigra is of central importance to the coordination of movement by the brain’s basal ganglia circuitry.This is evidenced by the loss of these neurons,resulting in the cardinal motor deficits associated with Parkinson’s disease.In order to fully understand the physiology of these key neurons and develop potential therapies for their loss,it is essential to determine if and how dopaminergic neurons are replenished in the adult brain.Recent work has presented evidence for adult neurogenesis of these neurons by Nestin^+/Sox2~–neural progenitor cells.We sought to further validate this finding and explore a potential atypical origin for these progenitor cells.Since neural progenitor cells have a proximal association with the vasculature of the brain and subsets of endothelial cells are Nestin^+,we hypothesized that dopaminergic neural progenitors might share a common cell lineage.Therefore,we employed a VE-cadherin promoter-driven CRE^(ERT2):TH^(lox)/TH^(lox) transgenic mouse line to ablate the tyrosine hydroxylase gene from endothelial cells in adult animals.After 26 weeks,but not 13 weeks,following the genetic blockade of tyrosine hydroxylase expression in VE-cadherin^+cells,we observed a significant reduction in tyrosine hydroxylase^+neurons in the substantia nigra.The results from this genetic lineage tracing study suggest that dopaminergic neurons are replenished in adult mice by a VE-cadherin^+progenitor cell population potentially arising from an endothelial lineage. | Abir A.Rahman Nathan K.Lai Joshua E.Albright Paige E.Urquhart Abby R.Webb Brad E.Morrison | 2017 | Neural Regeneration Research2017，12，11： | 1 |
| 6 | Investigation of Linear Tetra-Atomic Negative Ion by Photodetached-Electron Spectra显示文摘Photodetachment spectra from a linear tetra-atomic negative ion is investigated by treating the detached-electron wave function quantum mechanically.A plane polarized laser light,perpendicular to the axis of the ion,is used to detach the electron from the ion.Analytical expressions for the electron flux and total photodetachment cross section are derived.The electron flux on screen shows strong-energy-dependent oscillations with different frequencies.The total cross section of the tetra-atomic negative ion reduces the cross section of mono-atomic,diatomic and triatomic negative ions for high energy photons,while for low energy photons it becomes four times the cross section of mono-atomic negative ions. | A.Rahman Iftikhar Ahmad A.Afaq M.Haneef H.J.Zhao | 2011 | Chinese Physics Letters2011，28，8： | 0 |
| 7 | Photodetachment of H^(-) near a Hard Spherical Surface显示文摘The photodetachment of a hydrogen negative ion (H^(-)) near a hard spherical surface is investigated by using the theoretical imaging method.The surface is oriented in such a fashion that the laser polarization direction is perpendicular to the principal axis of the spherical surface.Analytical expressions are derived for the detachedelectron flux and photodetachment cross section.Strong interference patterns are observed in the detachedelectron flux,while no visible oscillations are found in the photodetachment cross section. | M.Haneef Iftikhar Ahmad A.Afaq A.Rahman | 2012 | Chinese Physics Letters2012，29，1： | 0 |
| 8 | Molecular epidemiology of piliated pneumococcal isolates at a major tertiary hospital in the Klang Valley,Malaysia显示文摘Objective:To characterise a collection of pili-carrying and none pili-carrying pneumococcal isolates of clinical origin for serotypes,antibiotic resistance and genotype.Methods:In total,42 clinical isolates were collected between October 2017 and December 2019.Those isolates were analysed for antimicrobial susceptibility,serotype distribution,detection of pneumococcal virulence and pilus genes.Multilocus sequence typing was performed only for piliated isolates,followed by phylogenetic analysis.Results:The common isolation sites among the pneumococcal isolates were tracheal aspirate(28.6%),blood(26.2%),and sputum(23.8%).Fifty percent isolates were resistant to erythromycin,tetracycline(50.0%)and trimethoprim-sulfamethoxazole(43.0%).The most frequent were serotypes 19F(28.6%),6A/B(23.8%)and 19A(14.3%).Piliated isolates were detected in a small proportion(33.3%);64.3%were multidrug-resistant.ST320 was the prevalent sequence type among the piliated isolates and genetically related to the Pneumococcal Molecular Epidemiology Network clones Taiwan19F-14(CC271).In the phylogenetic analysis,some piliated isolates showed a close association having similar ST320,carrying serotype 19A and both pilus genes indicating their clonal spread.Conclusions:Pneumococcal lineages of piliated isolates have been globally disseminated and pili could have played a role in the spread of antibiotic resistant clones. | Nurul Diana Dzaraly Mohd Nasir Mohd Desa AbdulRahman Muthanna Siti Norbaya Masri Niazlin Mohd Taib Nurul Hana Zainal Baharin Nurshahira Sulaiman Nurul Asyikin Abdul Rahman Navindra Kumari Palanisamy Zarizal Suhaili Semiat Opeyemi Yusuff Nor Iza A.Rahman Tuan Suhaila Tuan Soh Fatimah Haslina Abdullah | 2023 | Asian Pacific Journal of Tropical Medicine2023，16，2： | 0 |
| 9 | Intensity modulated silver coated glass optical fiber refractive index sensor显示文摘Miniature optical fiber sensors with thin films as sensitive elements could open new fields for optical fiber sensor applications. Thin films work as sensitive elements and a transducer to get response and feedback from environments, in which optical fibers act as a signal carrier. A novel Ag coated intensity modulated optical fiber sensor based on refractive index changes using IR and UV-Vis(UV-visible) light sources is proposed. The sensor with an IR light source has higher sensitivity compared to a UV-Vis source. When the refractive index is enhanced to 1.38, the normalized intensity of IR and UV-Vis light diminishes to 0.2 and 0.8, respectively. | Zahra Samavati Alireza Samavati A.F.Ismail Mukhlis A.Rahman M.H.D.Othman | 2018 | Chinese Optics Letters2018，16，9： | 0 |
| 10 | Growth performance and hematology of Djallonké rams fed haulms of four varieties of groundnut (Arachis hypogaea L.)显示文摘The study was conducted to assess the chemical composition of the haulms of 4 dual-purpose groundnut(Arachis hypogaea L.) varieties and their effects on the growth and hematology of Djallonke rams. The groundnut varieties were ICGV 97049(Obolo), ICGX SM 87057(Yenyawoso), RMP 12(Azivivi) and Manipinta. Rams(live weight 15.0 ± 3.0 kg) were randomly assigned to 4 sole groundnut haulm meal(GHM) treatments, with 4 rams each in an individual pen per treatment(total n = 16 rams). Samples of the groundnut haulms were milled and analyzed for crude protein(CP), neutral detergent fiber(NDF)and acid detergent fiber(ADF). The CP concentration was higher(P < 0.05) in Azivivi, Manipinta and Yenyawoso than in Obolo. The highest(P < 0.05) NDF and ADF fractions were obtained in Obolo. Whilst no significant difference was reported in total and daily dry matter(DM) intake among the varieties,CP,NDF and ADF intake all differed between Obolo and other varieties. The apparent nutrient digestibility did not differ(P> 0.05) when the Djallonke rams were fed the haulms. However, significant differences were observed in final live weight and average daily live weight gain. Rams fed the Yenyawoso variety had higher(P < 0.05) final live weight and average daily live weight gain compared with those fed Obolo and Azivivi varieties. Consumption of any of the 4 varieties of groundnut haulms by Djallonke rams did not have any harmful effect on their red and white blood cell numbers and hemoglobin concentration.The study revealed that the different varieties of groundnut haulms differ in nutrient composition and also affect the growth performance of the rams. The Yenyawoso variety may be used as a sole diet for fattening Djallonke rams. | Terry Ansah Zanabongo I.Yaccub Nurudeen A.Rahman | 2017 | Animal Nutrition2017，，4： | 0 |
| 11 | 枪弹伤致四肢长骨干粉碎骨折62例整复固定显示文摘 | 程银树 Aref A.Rahman Banafa | 2001 | 骨与关节损伤杂志2001，16，1： | 0 |
| 12 | Photodetachment of a Homo-Nuclear Linear Tetra-Atomic Negative Molecular Ion显示文摘The photodetachment of a homo-nuclear linear tetra-atomic negative molecular ion is studied theoretically for an arbitrary laser polarization.An expression for the total cross section is obtained by using an extended version of the two center model,where each center acts as a source of coherent photodetached-electron waves.Strong oscillations on observation plane,placed at a large distance from the ion,are observed.The amplitude of these oscillations is maximum when the laser polarization is parallel to the molecular axis.Furthermore,the amplitude decreases as the angle between the laser polarization and molecular axis increases and consequently vanishes when they are perpendicular to each other.It is also found that if the distance between the adjacent centers is very small or very large,then the ampplitude of oscillations is negligibly small. | A.Rahman Iftikhar Ahmad A.Afaq H.J.Zhao | 2012 | Chinese Physics Letters2012，29，4： | 0 |
| 13 | Reflection Profile of Iron Due to Corrosion Activity Using Fiber Optic显示文摘 | Asiah Yahaya Noor A'in A.Rahman Rosly A .Rahman M. Asmu'i M. Akil | 2011 | 材料科学与工程(中英文B版)2011，1，5： | 0 |
| 14 | Interferences in Photodetached Electron Spectra from a Linear Tetra-Atomic Negative Ion显示文摘Photo-detached electron spectra from a hypothetical linear tetra-atomic negative ion is obtained.A plane polarized laser parallel to the axis of the molecular ion is used to knock off the loosely bound electron.The spectrum of the detached-electron flux shows strong interference peaks,while the number of peaks increases with the increase in the photon energy.Strong oscillations are also observed in the total photodetachment cross section spectrum.The frequency of the oscillations increases with the increase in the distance between the successive atoms d in the linear chain.These quantum interference effects vanish for very large d or very high photon energy. | A.Rahman Iftikhar Ahmad A.Afaq M.Haneef | 2011 | Chinese Physics Letters2011，28，6： | 0 |
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