Displaying publications 1 - 20 of 28 in total

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  1. Chong WH, Ong HY, Ooi JS, Eleen Khaw YY, Lim LM, Tew MM, et al.
    Med J Malaysia, 2024 Mar;79(2):184-190.
    PMID: 38553924
    INTRODUCTION: Hypoxic ischemic encephalopathy (HIE) is a clinically defined syndrome of disturbed neurologic function in the newborn with evidence of perinatal asphyxia. Stages of HIE are categorised into mild, moderate or severe based on the Sarnat classification. Neurological dysfunction constitutes a part of the wide spectrum of hypoxic ischemic insult as affected infants can have co-existing multi-organ dysfunction which further contributes to morbidities and mortality. This study aims to determine the relationship between the severity of HIE with multi-organ complications and early clinical outcomes.

    MATERIALS AND METHODS: All neonates who were admitted to the NICU at Hospital Sultan Abdul Halim between January 2018 to December 2022, who fulfilled the inclusion criteria were included. Demographic data, clinical course and investigation results were retrospectively obtained from the medical records.

    RESULTS: From a total of 90 infants (n = 90) who fulfilled our inclusion criteria, 31 (34%) were mild, 31 (34%) were moderate and 28 (31%) were severe HIE. The mean maternal age was 27 years. Common antenatal issues include diabetes mellitus (37.8%) and anaemia (22.2%). The Apgar scores at 1 and 5 minutes, initial resuscitation requiring intubation, chest compression and adrenaline were associated with higher severity of HIE (p < 0.05). Coagulation dysfunction was the most common complication (79.7%), followed by respiratory dysfunction (33.3%), cardiac dysfunction (28.9%), renal dysfunction (16.1%), haematological dysfunction (15.6%) and hepatic dysfunction (12%). Respiratory and haematological dysfunctions were significantly associated with higher mortality (p < 0.05). There was a significant longer hospital stay (p = 0.023), longer duration of ventilation (p < 0.001) and increase in frequency of seizures (p < 0.001) when comparing moderate and severe HIE patients to mild HIE patients. With increasing severity of HIE, there was also statistically significant higher mortality (p < 0.001).

    CONCLUSIONS: There is a significant relationship between multiorgan dysfunction, the severity of HIE and mortality. Early anticipation of multi-organ injury is crucial for optimal early management which would reduce the mortality and improve the neurological outcome of the patients.

  2. Siti Aishah AA, Normala I, Faruque Reza M, M Iqbal S
    Med J Malaysia, 2023 Jan;78(1):46-53.
    PMID: 36715191
    INTRODUCTION: Studies are lacking in evaluating brain atrophy patterns in the Malaysian population. This study aimed to compare the patterns of cerebral atrophy and impaired glucose metabolism on 18F-FDG PET/CT imaging in various stages of AD in a Klang Valley population by using voxelbased morphometry in SPM12.

    MATERIALS AND METHODS: 18F-FDG PET/CT images of 14 healthy control (HC) subjects (MoCA score > 26 (mean+SD~ 26.93+0.92) with no clinical evidence of cognitive deficits or neurological disease) and 16 AD patients (MoCA ≤22 (mean+SD~18.6+9.28)) were pre-processed in SPM12 while using our developed Malaysian healthy control brain template. The AD patients were assessed for disease severity using ADAS-Cog neuropsychological test. KNE96 template was used for registration-induced deformation in comparison with the ICBM templates. All deformation fields were corrected using the Malaysian healthy control template. The images were then nonlinearly modified by DARTEL to segment grey matter (GM), white matter (WM) and cerebrospinal fluid (CSF) to produce group-specific templates. Age, intracranial volume, MoCA score, and ADASCog score were used as variables in two sample t test between groups. The inference of our brain analysis was based on a corrected threshold of p<0.001 using Z-score threshold of 2.0, with a positive value above it as hypometabolic. The relationship between regional atrophy in GM and WM atrophy were analysed by comparing the means of cortical thinning between normal control and three AD stages in 15 clusters of ROI based on Z-score less than 2.0 as atrophied.

    RESULTS: One-way ANOVA indicated that the means were equal for TIV, F(2,11) = 1.310, p=0.309, GMV, F(2,11) = 0.923, p=0.426, WMV, F(2,11) = 0.158, p=0.856 and CSF, F(2,11) = 1.495 p=0.266. Pearson correlations of GM, WM and CSF volume between HC and AD groups indicated the presence of brain atrophy in GM (p=-0.610, p<0.0001), WM (p=-0.178, p=0.034) and TIV (p=-0.374, p=0.042) but showed increased CSF volume (p=0.602, p<0.0001). Voxels analysis of the 18FFDG PET template revealed that GM atrophy differs significantly between healthy control and AD (p<0.0001). Zscore comparisons in the region of GM & WM were shown to distinguish AD patients from healthy controls at the prefrontal cortex and parahippocampal gyrus. The atrophy rate within each ROI is significantly different between groups (c2=35.9021, df=3, p<0.0001), Wilcoxon method test showed statistically significant differences were observed between Moderate vs. Mild AD (p<0.0001), Moderate AD vs. healthy control (p=0.0005), Mild AD vs. HC (p=0.0372) and Severe AD vs. Moderate AD (p<0.0001). The highest atrophy rate within each ROI between the median values ranked as follows severe AD vs. HC (p<0.0001) > mild AD vs. HC (p=0.0091) > severe AD vs. moderate AD (p=0.0143).

    CONCLUSION: We recommend a reliable method in measuring the brain atrophy and locating the patterns of hypometabolism using a group-specific template registered to a quantitatively validated KNE96 group-specific template. The studied regions together with neuropsychological test approach is an effective method for the determination of AD severity in a Malaysian population.

  3. Alamoudi RM, Aljohani NJ, Alfadhli EM, Alzaman N, Alfadhly AF, Kallash MA, et al.
    Diabetes Metab Syndr, 2023 Jan;17(1):102676.
    PMID: 36463695 DOI: 10.1016/j.dsx.2022.102676
    BACKGROUND AND AIMS: To compare Saudi Arabia with other countries regarding patient attitudes towards fasting Ramadan and complications related to fasting during the COVID-19 pandemic.

    METHODS: Data collected from Saudi Arabia and 12 other mostly Muslim majority countries, via physician administered questionnaire within post Ramadan 2020.

    RESULTS: 1485 Type1 diabetes (T1DM) patients analyzed; 705 (47.5%) from Saudi Arabia vs. 780 (52.5%) from other countries. 1056 (71.1%) fasted Ramadan; 636 (90.2%) of Saudi patients vs. 420 (53.8%) of other countries. Experiencing Ramadan during the COVID-19 pandemic did not affect the Saudi T1DM patients' decision to fast while it significantly influenced their decision in other countries (1.4 vs 9.9%, P 

  4. Siti Nor Aishah AR, Mutalib A, Asma H, Baig AA, Naing NN, Hashim SE, et al.
    Med J Malaysia, 2020 11;75(6):685-690.
    PMID: 33219178
    OBJECTIVES: To design and develop a simple vision test algorithm for mobile application and perform a pilot study to determine its validity and reliability as a tool for vision test in the community.

    METHODS: A simple visual acuity test algorithm in the form of a single letter E display was designed as the optotype for development of a mobile application. The standardised optotype is presented at random to test visual acuity for corresponding level of 3/60, 6/60, 6/18, and 6/12. The final result is auto-generated based on the classification of the WHO for visual impairment and blindness. The Snellen chart was used as the gold standard to determine its validity while five different users were involved to determine its inter-rater reliability. A pilot study was performed between April till November 2019, in the Universiti Sultan Zainal Abidin Medical Centre (UMC) at Kuala Nerus and Mooris Optometrist Centre at Marang, Terengganu. A total of 279 participants aged four years old and above were involved in this study.

    RESULTS: The highest sensitivity was found at the vision level cut-off point of 6/12 with the percentage of 92.7% and 86.8% for the right and left eye, respectively. The specificity was more than 89% for all vision levels in both eyes. The Krippendorff's alpha value for the inter-rater reliability was 0.87 and 0.83.

    CONCLUSION: The relatively high level of validity and reliability obtained indicate the feasibility of using the designed optotype to develop a valid and reliable mobile app for vision test. The app can be used to screen vision by nonmedical persons, at anytime and anywhere to help improve public awareness and capability to correctly determine their visual status.

  5. Emma Aishah, A., Muhammad Firdaus, M.F., Nur Syafiqah, T., Rozana, M.S., Sugasini, S.L., Syamsa Rizal, A., et al.
    Medicine & Health, 2020;15(2):224-235.
    MyJurnal
    Ovitrap autosidal berperanan penting dalam pemantauan dan kawalan vektor denggi, Aedes aegypti and Aedes albopictus. Beberapa jenis ovitrap ini telah digunakan di Malaysia termasuklah Mosquito Larvae Trapping Device (MLTD) yang diperkenalkan oleh Dewan Bandaraya Kuala Lumpur. Kajian ini bertujuan untuk menilai kepadatan larva Aedes dan pembolehubah meteorologi setempat di sebuah penempatan pelajar di Cheras, Kuala Lumpur. MLTD (n=30) dengan umpan larutan baja NPK (5:5:5) organik telah digunakan. Pengumpulan larva dan penyelenggaraan ovitrap telah dilakukan setiap minggu selama lapan minggu. Pemeliharaan larva dan penentuan spesies telah dijalankan di makmal. Daripada sejumlah 2,152 larva Aedes, 85% merupakan Ae. albopictus manakala selebihnya Ae. aegypti. Ae. albopictus lebih banyak dikumpulkan di luar berbanding di dalam bangunan (purata larva per ovitrap, 9.28 lawan 6.08). Sebaliknya, Ae. aegypti lebih banyak dikumpulkan di dalam berbanding di luar bangunan (1.72 lawan 0.86). Ovitrap indeks yang paling tinggi adalah semasa minggu kelima (90%) dan keenam (93%). Minggu pertama menunjukkan ovitrap indeks yang paling rendah (30%). Analisis mendapati korelasi positif antara kepadatan larva Aedes dan suhu maksimum (r=0.830, p=0.011), manakala kelembapan relatif minimum menunjukkan korelasi negatif (r=-0.778, p=0.023). Pemantauan rutin bagi peringkat pramatang vektor denggi boleh memberikan maklumat mengenai kepadatan dan naik turun populasi nyamuk setempat. Apabila digandingkan dengan faktor meteorologi sejajar, maklumat ini dapat memberi panduan bagi perlaksanaan kawalan vektor sebagai sebahagian strategi pencegahan denggi.
  6. Beaman GM, Galatà G, Teik KW, Urquhart JE, Aishah A, O'Sullivan J, et al.
    Clin Genet, 2019 12;96(6):515-520.
    PMID: 31441039 DOI: 10.1111/cge.13631
    CHRM3 codes for the M3 muscarinic acetylcholine receptor that is located on the surface of smooth muscle cells of the detrusor, the muscle that effects urinary voiding. Previously, we reported brothers in a family affected by a congenital prune belly-like syndrome with mydriasis due to homozygous CHRM3 frameshift variants. In this study, we describe two sisters with bladders that failed to empty completely and pupils that failed to constrict fully in response to light, who are homozygous for the missense CHRM3 variant c.352G > A; p.(Gly118Arg). Samples were not available for genotyping from their brother, who had a history of multiple urinary tract infections and underwent surgical bladder draining in the first year of life. He died at the age of 6 years. This is the first independent report of biallelic variants in CHRM3 in a family with a rare serious bladder disorder associated with mydriasis and provides important evidence of this association.
  7. Manaf NA, Saad B, Mohamed MH, Wilson LD, Latiff AA
    J Chromatogr A, 2018 Mar 30;1543:23-33.
    PMID: 29478831 DOI: 10.1016/j.chroma.2018.02.032
    Sorbents were prepared by cross-linking β-cyclodextrin (β-CD) using two different types of cross-linker units at variable reactant mole ratios. The resulting polymers containing β-CD were evaluated as sorbents in micro-solid phase extraction (μ-SPE) format for the extraction of the endogenous steroids testosterone (T), epitestosterone (E), androsterone (A), etiocholanolone (Etio), 5α-androstane-3α,17β-diol (5αAdiol) and 5β-androstane-3α,17β-diol (5βAdiol). The best sorbent (C1; cyclodextrin polymer) showed superior extraction characteristics compared with commercial sorbents (C18 and Bond Elut Plexa). Parameters influencing the extraction efficiency of the C1 sorbent such as extraction and desorption times, desorption solvent and volume of sample were investigated. The extracts were separated using a Hypersil Gold column (50 × 2.1 mm, 1.9 μm) under gradient elution coupled to a LC-MS/MS. The compounds were successfully separated within 8 min. The method offers good repeatability (RSD  0.995) were within the range of 1-200 ng mL-1 for T and E, 250-4000 ng mL-1 for A and Etio and 25-500 ng mL-1 for 5αAdiol and 5βAdiol, respectively. The method was applied for the determination of steroid profile of urine from volunteers.
  8. Tan, J.H., Aishah A. Fauzi, Hasnan, N.
    JUMMEC, 2017;20(2):31-33.
    MyJurnal
    There is a high incidence of 36% to 83% of respiratory dysfunction in patients with acute cervical spinal cord
    injury. Complications arising from respiratory dysfunction remain one of the most common causes of morbidity
    and mortality in the spinal cord injured population. Specialized pulmonary care and therapy can help individuals
    with tetraplegia to maintain a stable respiratory status allowing active participation in active rehabilitation.
    This would allow them to achieve rehabilitation goals of independent function and community reintegration.
    Mechanical insufflation-exsufflation (MIE) therapy is an option for secretion management in individuals with
    acute spinal cord injury. In this paper, we present our experience using MIE as an adjunct to management of
    secretions in the spinal cord injured population at the University of Malaya Medical Centre.
  9. Mustafah NM, Bakar NA, Fauzi AA, Hussein N
    Spinal Cord Ser Cases, 2017;3:17002.
    PMID: 28503319 DOI: 10.1038/scsandc.2017.2
    INTRODUCTION: Spinal cord injury (SCI) has increased over the years, and so has the survival. Women with SCI remain fertile and have equal chance of pregnancy.

    CASE PRESENTATION: We described a case of a 29-year-old lady with traumatic spinal cord injury (SCI) resultant with paraplegia in 2008, who conceived naturally 2 years after the injury. She only had her antenatal check-up at a low-risk antenatal center throughout her pregnancy and was not referred to specialized obstetric care. She did not appreciate active labor, and unexpectedly had a precipituous labor and gave birth in the bathroom.

    DISCUSSION: Pregnancy is relatively safe in women with spinal cord injury (SCI). However, disability-related issues can be exaggerated during pregnancy, delivery and post-partum periods. Thus, understanding common issues related to pregnancy in this population is important. Specialized obstetric care with rehabilitation input throughout antenatal and postnatal care is crucial for a good overall outcome of a pregnant woman with SCI.

  10. Khayoon WS, Saad B, Salleh B, Manaf NH, Latiff AA
    Food Chem, 2014 Mar 15;147:287-94.
    PMID: 24206720 DOI: 10.1016/j.foodchem.2013.09.049
    A single step extraction-cleanup procedure using porous membrane-protected micro-solid phase extraction (μ-SPE) in conjunction with liquid chromatography-tandem mass spectrometry for the extraction and determination of aflatoxins (AFs) B1, B2, G1 and G2 from food was successfully developed. After the extraction, AFs were desorbed from the μ-SPE device by ultrasonication using acetonitrile. The optimum extraction conditions were: sorbent material, C8; sorbent mass, 20mg; extraction time, 90 min; stirring speed, 1,000 rpm; sample volume, 10 mL; desorption solvent, acetonitrile; solvent volume, 350 μL and ultrasonication period, 25 min without salt addition. Under the optimum conditions, enrichment factor of 11, 9, 9 and 10 for AFG2, AFG1, AFB2 and AFB1, respectively were achieved. Good linearity and correlation coefficient was obtained over the concentration range of 0.4-50 ng g(-1) (r(2) 0.9988-0.9999). Good recoveries for AFs ranging from 86.0-109% were obtained. The method was applied to 40 samples involving malt beverage (19) and canned coffee (21). No AFs were detected in the selected samples.
  11. Abedin MZ, Karim AA, Latiff AA, Gan CY, Ghazali FC, Barzideh Z, et al.
    Nat Prod Res, 2014;28(16):1302-5.
    PMID: 24670209 DOI: 10.1080/14786419.2014.900617
    The molecular mass distribution, amino acid composition and radical-scavenging activity of collagen hydrolysates prepared from collagen isolated from the sea cucumber Stichopus vastus were investigated. β and α1 chains of the collagen were successfully hydrolysed by trypsin. The molecular mass distribution of the hydrolysates ranged from 5 to 25 kDa, and they were rich in glycine, alanine, glutamate, proline and hydroxyproline residues. The hydrolysates exhibited excellent radical-scavenging activity. These results indicate that collagen hydrolysates from S. vastus can be used as a functional ingredient in food and nutraceutical products.
  12. Wesam RK, Ghanya AN, Mizaton HH, Ilham M, Aishah A
    Asian Pac J Trop Med, 2013 Oct;6(10):811-6.
    PMID: 23870471 DOI: 10.1016/S1995-7645(13)60143-1
    OBJECTIVE: To investigate the cytotoxicity and the genotoxicity of standardized aqueous of dry leaves of Erythroxylum cuneatum (E. cuneatum) in human HepG2 and WRL68 cells.

    METHODS: The cytotoxicity of E. cuneatum extract was evaluated by both MTS and LDH assays. Genotoxicity study on E. cuneatum extract was assessed by the single cell gel electrophoresis (comet assay). The protective effect of E. cuneatum against menadione-induced cytotoxicity was also investigated.

    RESULTS: Results from this study showed that E. cuneatum extract exhibited cytotoxic activities towards the cells with IC50 value of (125±12) and (125±14) μg/mL for HepG2 and WRL68 cells respectively, after 72 h incubation period as determined by MTS assay. LDH leakage was detected at (251±19) and (199.5±12.0) μg/mL for HepG2 and WRL68 respectively. Genotoxicity study results showed that treatment with E. cuneatum up to 1 mg/mL did not cause obvious DNA damage in WRL68 and HepG2 cells. Addition of E. cunaetum did not show significant protection towards menadione in WRL68 and HepG2 Cells.

    CONCLUSIONS: E. cuneatum standardized aqueous extract might be developed in order to establish new pharmacological possibilities for its application.

  13. Abedin MZ, Karim AA, Ahmed F, Latiff AA, Gan CY, Che Ghazali F, et al.
    J Sci Food Agric, 2013 Mar 30;93(5):1083-8.
    PMID: 22936269 DOI: 10.1002/jsfa.5854
    Sea cucumber (Stichopus vastus) is considered an underutilized resource, since only its stomach and intestines are eaten raw as salad in a few countries and the remaining parts, especially the integument rich in collagen, is discarded. Hence a valuable by-product having potential nutraceutical and pharmaceutical applications is wasted. In the present investigation, pepsin-solubilized collagen (PSC) from the integument of S. vastus was isolated, purified and characterized.
  14. Bahrom NA, Sirajudeen K, Yip GW, Latiff AA, Ghazali FC
    Food Sci Nutr, 2013 Jan;1(1):83-9.
    PMID: 24804017 DOI: 10.1002/fsn3.10
    In this article, the novel inventive steps for the extraction and quantification of sulfated glycosaminoglycan (GAG) from Acanthaster planci starfish, generally known as crown-of-thorns (COT), are reported. Starfish have been implicated with collagenous distributions within their body anatomy, thus making it a prima facie fact searching for the possibility that GAGs can be isolated from COT. In this study, total-, N-, and O-sulfated GAGs were extracted from three anatomical regions of the COT (integument, internal tissue, and coelomic fluid) and comparison was made. The result showed that body region of COT seemed to contain higher amount of sulfated GAGs as opposed to the arm region (55.79 ± 0.65 μg/mg was the highest amount in the body extracted from its coelomic fluid and 32.28 ± 3.14 μg/mg was the highest amount in the arm extracted from its internal tissue). COT's integument and coelomic fluid from its body region possessed the highest total of sulfated GAGs content with no significant difference (P 
  15. Tuan Fauzan Tuan Omar, Ainie Kuntom, Aishah A. Latiff
    Sains Malaysiana, 2013;42:571-578.
    Environmental samples collected from oil palm premises were evaluated for dioxins/furans contamination. The samplings were carried out at oil palm premises located in Banting (Premise A) and Teluk Intan (Premise B), involving two environmental matrices namely ambient air and soil. The soil samples were collected in the plantations while ambient air samples were collected in the vicinity of the mills and refineries. The results of the analyses showed that the level of dioxins/furans in ambient air were generally higher in oil palm premise located adjacent to industrial establishments. The concentration levels at premise A mill and refinery located adjacent to industrial establishments, ranged from 64.14 WHO–TEQ fg m-3 to 131.87 WHO–TEQ fg m-3, while for premise B mill and refinery located in the rural area, ranged from 9.93 WHO–TEQ fg m-3 to 16.66 WHO–TEQ fg m-3. Meanwhile for soil samples, the highest concentrations were recorded in soil collected near roads used heavily by vehicles. The concentration levels of soil samples collected at premise A and
    premise B plantations ranged from 1.910 WHO-TEQ pg g-1 dry weight to 3.305 WHO-TEQ pg g-1 dry weight.
  16. Leong YH, Latiff AA, Ahmad NI, Rosma A
    Mycotoxin Res, 2012 May;28(2):79-87.
    PMID: 23606045 DOI: 10.1007/s12550-012-0129-8
    Aflatoxins are highly toxic secondary fungal metabolites mainly produced by Aspergillus flavus and A. parasiticus. Human exposure to aflatoxins may result directly from ingestion of contaminated foods, or indirectly from consumption of foods from animals previously exposed to aflatoxins in feeds. This paper focuses on exposure measurement of aflatoxins and aflatoxin metabolites in various human body fluids. Research on different metabolites present in blood, urine, breast milk, and other human fluids or tissues including their detection techniques is reviewed. The association between dietary intake of aflatoxins and biomarker measurement is also highlighted. Finally, aspects related to the differences between aflatoxin determination in food versus the biomarker approach are discussed.
  17. Leong YH, Rosma A, Latiff AA, Izzah AN
    Int J Hyg Environ Health, 2012 Apr;215(3):368-72.
    PMID: 22230243 DOI: 10.1016/j.ijheh.2011.12.005
    Aflatoxins are one of the major risk factors in the multi-factorial etiology of human hepatocellular carcinoma. Therefore, the information on aflatoxins exposure is very important in the intervention planning in order to reduce the dietary intake of aflatoxins, especially among the children. This study investigated the relationship between aflatoxin B(1) (AFB(1)) lysine adduct levers in serum and socio-demographic factors and dietary intake of aflatoxins from nuts and nut products in Penang, Malaysia. A cross-sectional field study was conducted in five districts of Penang. A survey on socio-demographic characteristics was administered to 364 healthy adults from the three main ethnic groups (Malay, Chinese and Indian). A total of 170 blood samples were successfully collected and tested for the level of AFB(1)-lysine adduct. 97% of the samples contained AFB(1)-lysine adduct above the detection limit of 0.4 pg/mg albumin and ranged from 0.20 to 23.16 pg/mg albumin (mean±standard deviation=7.67±4.54 pg/mg albumin; median=7.12 pg/mg albumin). There was no significant association between AFB(1)-lysine adduct levels with gender, district, education level, household number and occupation when these socio-demographic characteristics were examined according to high or low levels of AFB(1)-lysine. However, participants in the age group of 31-50 years were 3.08 times more likely to have high AFB(1) levels compared to those aged between 18 and 30 years (P=0.026). Significant difference (P=0.000) was found among different ethnic groups. Chinese and Indian participants were 3.05 and 2.35 times more likely to have high AFB(1) levels than Malay. The result of AFB(1)-lysine adduct suggested that Penang adult population is likely to be exposed to AFB(1) but at a level of less than that needed to cause direct acute illness or death.
  18. Leong YH, Rosma A, Latiff AA, Ahmad NI
    Mycotoxin Res, 2011 Aug;27(3):207-14.
    PMID: 23605801 DOI: 10.1007/s12550-011-0097-4
    Aflatoxin B1 (AFB1) was detected in 57% of the nuts and nut products marketed in Penang, Malaysia using the liquid chromatography tandem mass spectrometry. The contamination levels ranged from 0.40 to 222 μg/kg and 17 out of 128 samples (13.3%) contained AFB1 above the European Commission permitted level (2 μg/kg). Estimated dietary exposure of AFB1 in nuts and nut products were 0.36 ng per kg body weight and day and 8.89 ng per kg body weight and day, representing the low and high-level of exposure, respectively. Dose-response modelling resulted in benchmark dose lower confidence limit (BMDL10) values of 0.305 ng per kg body weight and day, with the best fitted from the log-logistic model. The derived margin of exposure (MoE) values ranged from 34 to 847 suggested that AFB1 would be of public health concern and might reasonably be considered as a high priority for risk management actions.
  19. Jalil AA, Triwahyono S, Adam SH, Rahim ND, Aziz MA, Hairom NH, et al.
    J Hazard Mater, 2010 Sep 15;181(1-3):755-62.
    PMID: 20538408 DOI: 10.1016/j.jhazmat.2010.05.078
    In this study, calcined Lapindo volcanic mud (LVM) was used as an adsorbent to remove an anionic dye, methyl orange (MO), from an aqueous solution by the batch adsorption technique. Various conditions were evaluated, including initial dye concentration, adsorbent dosage, contact time, solution pH, and temperature. The adsorption kinetics and equilibrium isotherms of the LVM were studied using pseudo-first-order and -second-order kinetic equations, as well as the Freundlich and Langmuir models. The experimental data obtained with LVM fits best to the Langmuir isotherm model and exhibited a maximum adsorption capacity (q(max)) of 333.3 mg g(-1); the data followed the second-order equation. The intraparticle diffusion studies revealed that the adsorption rates were not controlled only by the diffusion step. The thermodynamic parameters, such as the changes in enthalpy, entropy, and Gibbs free energy, showed that the adsorption is endothermic, random and spontaneous at high temperature. The results indicate that LVM adsorbs MO efficiently and could be utilized as a low-cost alternative adsorbent for the removal of anionic dyes in wastewater treatment.
  20. Jalil AA, Triwahyono S, Razali NA, Hairom NH, Idris A, Muhid MN, et al.
    J Hazard Mater, 2010 Feb 15;174(1-3):581-5.
    PMID: 19864065 DOI: 10.1016/j.jhazmat.2009.09.091
    Electrochemical dechlorination of chlorobenzenes in the presence of various arene mediators such as naphthalene, biphenyl, phenanthrene, anthracene, and pyrene, was studied. The amount of mediator required was able to be reduced to 0.01 equiv. for all mediators except for anthracene, with the complete dechlorination of mono-, 1,3-di- and 1,2,4-trichlorobenzene still achieved. This catalytic amount of mediator plays an important role in accelerating the dechlorination through the rapid formation of radical anions prior to reduction of the chlorobenzenes.
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