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Novel energy recovery from an integrated municipal solid waste and leachate treatment system

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Waste Disposal and Sustainable Energy 2024年第1期6卷 53-61页

作者： siti Salwa Khamis Hadi Purwanto Hamzah Mohd Salleh Alya Naili Rozhan mohamed Abdur Rahman Mahammadsalman Warimani Noor Alam Faculty of Engineering International Islamic University MalaysiaJalan Gombak53100Kuala LumpurMalaysia Department of Engineering Management Universitas Internasional Semen IndonesiaGresikIndonesia Halalan Thayyiban Research Centre Sultan Sharif Ali Islamic UniversityBandar Seri BegawanBrunei Department of Mechanical Engineering P.A.College of EngineeringMangaloreKarnataka574153India Department of Mechanical Engineering Malaysia-Japan International Institute of TechnologyUniversity of Technology Malaysia54100Kuala LumpurMalaysia

Population growth,waste generation,and massive waste mismanagement have led to environmental *** of municipal solid waste(MSW)requires an efficient and sustainable integrated *** integrated thermal processing of MSW is one of the best waste management *** this study,energy analysis of MSW is carried out based on the material and energy balance of 2000 kg wet MSW,which contains 50%*** the leachate is removed,the dry MSW is sent for carbon content enhancement in carbonization to produce MSW-based ***,the combustion of MSW-based char provided high heat and syngas to be used in a hydrothermal process for MSW leachate *** result shows that the char fuel of MSW produces a sufficient amount of energy,13501.29 MJ(84.55%),in the form of synthetic gas by-product,which has a big potential as an energy *** novelty of the proposed integrated thermal system is to produce 84.55%synthetic gas by-product,which is used for electricity production,cooking,food,and heat energy for industrial *** proposed applications of this paper offer insightful information for policymaking regarding novel MSW techniques,which are economical,energy-efficient,and environmentally ***,it increases the effectiveness of MSW utilization.

关键词： Energy Carbonization Hydrothermal Municipal solid waste Integrated system

Life Threatening Stridor Due to Primary Laryngeal Tuberculosis

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International Journal of Otolaryngology and Head & Neck Surgery 2024年第1期13卷 62-69页

作者： siti Aisyah mohamed Azreen Zaira Abu Bakar Mawaddah Azman Otorhinolaryngology Department Hospital Ampang Selangor Malaysia Otorhinolaryngology Department Faculty of Medicine Universiti Kebangsaan Malaysia Kuala Lumpur Malaysia Otorhinolaryngology Department Hospital Kuala Lumpur Kuala Lumpur Malaysia

Tuberculosis is a potentially serious infectious disease. In otorhinolaryngology practice, lymph node infection is the most common site of predilection followed by the larynx. Laryngeal tuberculosis (LTB) typically presents with dysphagia, odynophagia and hoarseness. We reported a case of primary LTB presenting with acute upper airway obstruction and respiratory distress mimicking acute supraglottitis which requires emergency tracheostomy. Therefore, in acute upper airway obstruction, the appropriate initial investigation should be done to rule out TB to make sure early treatment can be given and it may prevent complications of disease to the patient. .

关键词： Extra-Pulmonary Granulomatous Infection Malignancy Upper Airway

Nephroprotective effects of Zingiber zerumbet Smith ethyl acetate extract against paracetamol-induced nephrotoxicity and oxidative stress in rats

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第3期13卷 176-185页

作者： Zariyantey ABDUL HAMID siti Balkis BUDIN Ng WEN JIE Asmah HAMID Khairana HUSAIN Jamaludin mohamed Department of Biomedical Science Faculty of Health Sciences Universiti Kebangsaan Malaysia Jalan Raja Muda Abdul Aziz 50300 Kuala Lumpur Malaysia Drug and Herbal Research Center Faculty of Pharmacy Universiti Kebangsaan Malaysia Jalan Raja Muda Abdul Aziz 50300 Kuala Lumpur Malaysia

Paracetamol (PCM) overdose can cause nephrotoxicity with oxidative stress as one of the possible mechanisms mediating the event. In this study, the effects of ethyl acetate extract of Zingiber zerumbet rhizome [200 mg per kg of body weight (mg/kg) and 400 mg/kg] on PCM-induced nephrotoxicity were examined. Rats were divided into five groups containing 10 rats each. The control group received distilled water while other groups were treated with extract alone (400 mg/kg), PCM alone (750 mg/kg), 750 mg/kg PCM+200 mg/kg extract (PCM+ 200-extract), and 750 mg/kg PCM+400 mg/kg extract (PCM+400-extract), respectively, for seven consecutive days. The Z. zerumbet extract was given intraperitoneally concurrent with oral administration of PCM. Treatment with Z. zerumbet extract at doses of 200 and 400 mg/kg prevented the PCM-induced nephrotoxicity and oxidative impairments of the kidney, as evidenced by a significantly reduced (P<0.05) level of plasma creatinine, plasma and renal malondialdehyde (MDA), plasma protein carbonyl, and renal advanced oxidation protein product (AOPP). Furthermore, both doses were also able to induce a significant increment (P<0.05) of plasma and renal levels of glutathione (GSH) and plasma superoxide dismutase (SOD) activity. The nephroprotective effects of Z. zerumbet extract were confirmed by a reduced intensity of renal cellular damage, as evidenced by histological findings. Moreover, Z. zerumbet extract administered at 400 mg/kg was found to show greater protective effects than that at 200 mg/kg. In conclusion, ethyl acetate extract of Z. zerumbet rhizome has a protective role against PCM-induced nephrotoxicity and the process is probably mediated through its antioxidant properties.

关键词： Zingiber zerumbet Antioxidant Oxidative stress Nephrotoxicity Paracetamol

Toxic effects of Litsea elliptica Blume essential oil on red blood cells of Sprague-Dawley rats

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第11期10卷 813-819页

作者： Izatus Shima TAIB siti Balkis BUDIN Seri Maseran siti NOR AIN Jamaludin mohamed Santhana Raj LOUIS Srijit DAS Sulaiman SALLEHUDIN Nor Fadilah RAJAB Othman HIDAYATULFATHI Department of Biomedical Sciences Faculty of Allied Health SciencesUniversiti Kebangsaan MalaysiaJalan Raja Muda Abdul Aziz50300 Kuala LumpurMalaysia Unit of Electron Microscope Institute for Medical ResearchJalan Pahang50588 Kuala LumpurMalaysia Department of Anatomy Universiti Kebangsaan MalaysiaJalan Raja Muda Abdul Aziz50300 Kuala LumpurMalaysia

Litsea elliptica Blume leaves have been traditionally used as medicinal herbs because of its antimutagenicity,chemopreventative and insecticidal properties. In this study,the toxic effects of L. elliptica essential oil against Sprague-Dawley rat’s red blood cells (RBCs) were evaluated. L. elliptica essential oil was given by oral gavage 5 times per week for 3 treated groups in the doses of 125,250,and 500 mg/(kg body weight),respectively,and the control group received distilled water. Full blood count,RBC osmotic fragility,RBC morphological changes,and RBC membrane lipid were analyzed 28 d after the treatment. Although L. elliptica essential oil administration had significantly different effects on hemoglobin (Hb),mean cell hemoglobin concentration (MCHC),mean cell volume (MCV),and mean cell hemoglobin (MCH) in the experimental groups as compared to the control group (P0.05). It is concluded that structural changes in the RBC membrane due to L. elliptica essential oil administration did not cause severe membrane damage.

关键词： Litsea elliptica Toxicity Red blood cells Morphology Cell membrane Echinocyte

Influence of urban air pollution on the population in the Klang Valley,Malaysia:a spatial approach

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Ecological Processes 2022年第1期11卷 126-141页

作者： siti Haslina Mohd Shafie Mastura Mahmud Suzani Mohamad Nor Lita Fadilah Rameli Ramdzani Abdullah Ahmad Fariz mohamed Centre for Research in Development Social and Environment(SEEDS)Faculty of Social Sciences and HumanitiesUniversiti Kebangsaan MalaysiaBangiSelangorMalaysia Department of Environment Faculty of Forestry and Envi-ronmentUniversiti Putra MalaysiaSerdangSelangorMalaysia Institute for Environment and Development(LESTARI) Universiti Kebangsaan MalaysiaBangiSelangorMalaysia.

Background:Urban air pollution resulting from economic growth as well as urbanization impacts the health of *** study aims to examine the spatial distribution of particulate matter(PM_(10))and the risk of exposure for the population in the Klang Valley,an urban conglomeration centred in Kuala Lumpur,***:The inverse distance weighted(IDW)interpolation technique in the ArcGIS platform was used to map the air quality from five air monitoring *** statistics of the Global Moran’s I Spatial Autocorrelation and Optimized Hot Spot Analysis were used to estimate the spatial clustering of PM_(10).The population-weighted exposure level(PWEL)technique was used to calculate the population density susceptible to PM_(10)and the AirQ+model was applied to estimate the proportion of the adult population at risk of chronic bronchitis due to long-term exposure to PM_(10)concentrations in the Klang ***:The highest annual mean PM_(10)concentrations at the Klang station ranged between 80 and 100μg/m^(3)from 2000 to 2009 and exceeded the New Malaysia Ambient Air Quality Standard(NMAAQS)and the World Health Organi-zation Air Quality Guidelines(WHOAQG)levels of 40 and 20μg/m^(3),*** Moran’s I results indicated that the statistically significant clusters of high PM_(10)in Klang present a health risk to the local *** PWEL results showed that levels of PM_(10)in Petaling Jaya exceeded the WHOAQG limits,potentially posing a health risk to the high-density *** AirQ+model found Klang to be a significantly high-risk area for chronic bronchitis among the adult population with 804,240 people(with a relative risk of 1.85)in ***:These high-risk values are due to rapid urbanization and high motor vehicle usage in the Klang Valley and therefore the impact of PM_(10)on the population needs to be *** situation should be taken seriously by the Department of Environment and Kuala Lumpur City Hall in addre

关键词： Population Urban air pollution Spatial distribution PM_(10) Adult chronic bronchitis risk

Persistent Pseudomonas Infection Mastoiditis—Local Antibiotic Treatment Is Superior than Systemic

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International Journal of Otolaryngology and Head & Neck Surgery 2023年第3期12卷 92-98页

作者： siti Aisyah mohamed Roslim-siti Norain Shahrul Hitam Asma Binti Abdullah Department of Otorhinolaryngology Hospital Ampang Selangor Malaysia Department of Otorhinolaryngology Universiti Kebangsaan Malaysia Kuala Lumpur Malaysia

Mastoiditis is a common complication of acute otitis media. It is common in younger age compared to adulthood. Mastoiditis occurs when an otitis media infection spread directly to involve the bone of mastoid air cell causing osteitis. Cholesteatoma can contribute to the development of mastoiditis. This typically leads to breakdown of some of the fine bony trabeculae of mastoid cells producing a coalescent mastoiditis with an emphyema in mastoid antrum. Cholesteatoma can contribute to the development of mastoiditis. The common treatment for mastoiditis is intravenous antibiotic. Our cases show that local antibiotic treatment is superior compared to systemic antibiotic in treating multi-drug resistant chronic. Pseudomonas mastoiditis compared to intravenous antibiotic. However, if it presents together with cholesteatoma the main treatment is still early mastoidectomy.

关键词： Antibiotic Cholesteatoma Drug-Resistant Mastoidectomy Mastoiditis

Reconfigurable Pattern Patch Antenna for Mid-Band 5G:A Review

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Computers, Materials & Continua 2022年第2期70卷 2699-2725页

作者： siti Rahena Isa Muzammil Jusoh Thennarasan Sabapathy Jamel Nebhen Muhammad Ramlee Kamarudin mohamed Nasrun Osman Qammer Hussain Abbasi Hasliza A.Rahim Mohd Najib Mohd Yasin Ping Jack Soh Department of Electrical Engineering Politeknik Sultan Abdul Halim Mu’adzam ShahJitra06000Malaysia Advanced Communication Engineering(ACE) Centre of ExcellenceUniversiti Malaysia Perlis.Faculty of Electronic Engineering TechnologyUniversiti Malaysia PerlisPauh Putra02600Malaysia College of Computer Engineering and Sciences Prince Sattam Bin Abdulaziz UniversityP.O.Box 151Alkharj11942Saudi Arabia Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn MalaysiaParit Raja86400Malaysia School of Engineering University of GlasgowGlasgowG128QQU.K

New requirements in communication technologies make it imperative to rehash conventional features such as reconfigurable antennas to adapt with the future adaptability *** paper presents a comprehensive review of reconfigurable antennas,specifically in terms of radiation patterns for adaptation in the upcoming Fifth Generation(5G)New Radio frequency *** represent the key of antenna technology for materializing a high rate transmission,increased spectral and energy efficiency,reduced interference,and improved the beam steering and beam shaping,thereby land a great promise for planar antennas to boost the mid-band *** review begins with an overview of the underlying principals in reconfiguring radiation patterns,followed by the presentations of the implemented innovative antenna topologies to suit particular advanced *** various adaptation techniques of radiation pattern reconfigurable planar antennas and the understanding of its antenna design approaches has been investigated for its radiation pattern enhancement.A variety of design configurations have also been critically studied for their compatibilities to be operated in the midband communication *** review provides new insights on pattern reconfigurable antenna where such antennas are categorized as beam steering antenna and beamshaping antennas where the operation modes and purposes are clearly *** review also revealed that for mid-band 5G communication,the commonly used electronic switching such as PIN diodes have sufficient isolation loss to provide the required beam performance.

关键词： 5G mid-band pattern antenna reconfigurable antenna phased array antenna antenna and propagation

Curcumin gum Arabic nanoparticles demonstrate potent antioxidant and cytotoxic properties in human cancer cells

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BIOCELL 2022年第3期46卷 677-687页

作者： ABDELKADER HASSANI siti ASLINA HUSSAIN MOTHANNA SADIQ AL-QUBAISI mohamed LAKHDER BELFAR HAKIM BELKHALFA HAMID HAMMAD ENEZEI HAMID ZENTOU WISAM NABEEL IBRAHIM ABD ALMONEM DOOLAANEA Department of Pharmaceutical Technology Faculty of PharmacyInternational Islamic University MalaysiaKuantanMalaysia Department of Chemical and Environmental Engineering University Putra MalaysiaSerdang43400Malaysia Department of Chemistry Faculty of Mathematics and Material SciencesUniversity of kasdi MurbahOuarglaAlgeria UPM-MAKNA Cancer Research Laboratory Institute of BioscienceUniversity Putra MalaysiaSerdangMalaysia Scientific and Technical Research Center in Physicochemical Analysis Bou-IsmailTipazaAlgeria Department of Oral&Maxillofacial Surgery College of DentistryUniversity of AnbarRamadiIraq Department of Biomedical Sciences College of Health SciencesQU HealthQatar UniversityDohaQatar Pharmaceutical Research Unit QU HealthQatar UniversityDohaQatar

The main purpose of the study was to enhance the stability and therapeutic effects of Curcumin(Cur)through nanoformulation with gum Arabic(GA)as a coating agent through an efficient synthetic *** antioxidant properties of the developed nanoparticles(Cur/GANPs)were assessed through several in vitro assays,such asβ-carotene bleaching activity,DPPH,and nitric oxide scavenging activities in addition to evaluating its inhibitory activity on angiotensinconverting enzyme(ACE).The cytotoxicity of Cur/GANPs was evaluated in vitro using different types of human cancer cells including breast cancer(MCF7,MDA-MB231),liver cancer(HepG2),and colon cancer(HT29)*** prepared particles displayed an elliptical shape with a size ranging between 20–260 nm and a potential difference of–15 *** Cur/GANPs exhibited significant antioxidant activity compared to free curcumin when using concentrations between 31.5 and 500μg/*** Cur/GANPs also had inhibited the growth of all cancer cell lines in a proportional trend with concentrations ***,the encapsulation with gum Arabic has augmented the antioxidant and anti-neoplastic effects of ***,Cur/GANPs may have effective therapeutic properties in diseases attributed to oxidative stress like cancer and hypertension.

关键词： Curcumin Gum arabic Nanoparticles Cancer cells Antioxidants

Applied whispering gallery modes on ZnO nanorods coated glass for humidity sensing application

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Optoelectronics Letters 2021年第5期17卷 298-301页

作者： Mohd Hafiz Jali Hazli Rafis Abdul Rahim Md Ashadi Md Johari Maslinda Mat Sharif siti Halma Johari Siddharth Thokchom Habibah mohamed Moh Yasin Sulaiman Wadi Harun Department of Electrical Engineering University of MalayaKuala Lumpur50603Malaysia Faculty of Electrical Engineering Universiti Teknikal Malaysia MelakaMelaka76100Malaysia Faculty of Electronic and Computer Engineering Universiti Teknikal Malaysia MelakaMelaka76100Malaysia Faculty of Electrical and Electronic Engineering Technology Universiti Teknikal Malaysia MelakaMelaka76100Malaysia School of Technology Assam Don Bosco UniversityGuwahatiAssam781017India Malaysia-Japan International Institute of Technology Universiti Teknologi MalaysiaKuala Lumpur54100Malaysia Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

In this letter,a humidity sensor is demonstrated by applying a whispering gallery mode(WGM)from a microsphere resonator onto the ZnO nanorods coated glass *** diameter of the microsphere was 234μm and the glass surface was coated with ZnO nanorods using the hydrothermal method at growth duration of 12 h.A significant response to humidity level ranging from 35%RH to 85%RH has been observed with the sensitivity of 0.0142 nm/%*** proposed humidity sensor has successfully employed to enhance interaction between the whispering gallery mode evanescent and surrounds analyte with the assistance of ZnO nanorods coated glass.

关键词： WGM ZnO Applied whispering gallery modes on ZnO nanorods coated glass for humidity sensing application