Displaying publications 481 - 500 of 1243 in total

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  1. Jaafar MS, Hamid O, Khor CS, Yuvaraj RM
    Malays J Med Sci, 2002 Jan;9(1):28-33.
    PMID: 22969315 MyJurnal
    The relationship between left ventricular mass (LVM) and the mean arterial blood pressure (MAP) was investigated, using M-Mode echocardiography. MAP was higher in hypertensive patients (p<0.05, n=9) compared to that of controlled subjects. The results showed that LVM index for hypertensive patients was significantly higher (p<0.05, n=9) than that for the normal group. LVM index correlates fairly (r=0.6) with MAP for hypertensive patients. The results also show that the increase of intraventricular septal wall thickness (IVST) was due to hypertension. The LVM (r =0.9) and IVST (r=0.75) of the normal subjects were linearly dependent on the body surface area (BSA). The hypertensive group revealed a non-linear relationship to the BSA.
  2. Wan Omar A, Sulaiman O, Yusof S, Ismail G, Fatmah MS, Rahmah N, et al.
    Malays J Med Sci, 2001 Jul;8(2):19-24.
    PMID: 22893756
    We have recently reported that a dipstick colloidal dye immunoassay (DIA) that detect parasite antigens in human serum is sensitive and specific for the diagnosis of active infection of lymphatic filariasis. Rabbit polyclonal antibodies (RbBmCAg) labelled with a commercial dye, palanil navy blue was used to detect filarial antigenemia among Indonesian and Bangladeshi immigrant workers (N= 630) at oil palm estates at Hulu Trengganu District, Peninsular Malaysia. Microfilaremia with Brugia malayi were detected in 51 (8.10 %) individuals, of which 42 (6.67 %) were among the Indonesians and 9 (1.98 %) among the Bangladeshis. Microfilaremia with Wuchereria bancrofti were detected in 33 (5.24 %) individuals of which 15 (2.38 %) were among the Indonesians and 18 (2.86 %) among the Bangladeshis workers. The DIA detected 96 (15.24 %) antigenemic cases which comprise of all the microfilaremic cases and 15 (2.38 %) amicrofilaremic cases. The amicrofilaremic cases with filarial antigenemia consisted of 9 (1. 43 %) Indonesians and 6 (0.95%) Bangladeshis. We have used 6 ul of the RbBmCAg and diluted (1:10) patients' sera per dipstick which make the DIA reagent conservative. The DIA is a rapid test and can be read in approximate 2 hours.. Additionally, coloured dots developed in the DIA can be qualitatively assessed visually for intensity. The DIA does not require sophisticated equipment or radioactivity, and therefore suitable for field application.
  3. Ahamed MB, Aisha AF, Nassar ZD, Siddiqui JM, Ismail Z, Omari SM, et al.
    Nutr Cancer, 2012;64(1):89-99.
    PMID: 22136553 DOI: 10.1080/01635581.2012.630160
    Cat's whiskers (Orthosiphon stamineus) is commonly used as Java tea to treat kidney stones including a variety of angiogenesis-dependent diseases such as tumorous edema, rheumatism, diabetic blindness, and obesity. In the present study, antitumor potential of standardized 50% ethanol extract of O. stamineus leaves (EOS) was evaluated against colorectal tumor in athymic mice and antiangiogenic efficacy of EOS was investigated in human umbilical vein endothelial cells (HUVEC). EOS at 100 mg/kg caused 47.62 ± 6.4% suppression in tumor growth, while at 200 mg/kg it caused 83.39 ± 4.1% tumor regression. Tumor histology revealed significant reduction in extent of vascularization. Enzyme-linked immunosorbent assay showed EOS (200 mg/kg) significantly reduced the vascular endothelial growth factor (VEGF) level in vitro (211 ± 0.26 pg/ml cell lysate) as well as in vivo (90.9 ± 2 pg/g tissue homogenate) when compared to the control (378 ± 5 and 135.5 ± 4 pg, respectively). However, EOS was found to be noncytotoxic to colon cancer and endothelial cells. In vitro, EOS significantly inhibited the migration and tube formation of human umbilical vein endothelial cells (HUVECs). EOS suppressed VEGF-induced phosphorylation of VEGF receptor-2 in HUVECs. High performance liquid chromatography (HPLC) analysis of EOS showed high rosmarinic acid contents, whereas phytochemical analysis revealed high protein and phenolic contents. These results demonstrated that the antitumor activity of EOS may be due to its VEGF-targeted antiangiogenicity.
  4. Suraya Hanim Abdullah Hashim, Liew K. Y., Sahadevan M., Shoib M. S., Zainal Abidin H., Abidin N. N., et al.
    MyJurnal
    Introduction:Increasing number and the complexity of dengue cases pose a great challenge. The dengue outbreak preparedness and contingency plan is a series of collective intervention or polices put into place via collective agreement between administrative, Medical, Emergency Department and Intensive Care Unit (ICU). The aim of this paper is to evaluate the impact implementation of a dengue contingency plan on the clinical outcome of dengue cases. Methods: Implementation of the dengue outbreak preparedness and contingency plan was commenced in 2017. A pre-intervention (2017) and post-intervention (2018) retrospective review of mortality cases and referral to ICU were undertaken. The interventions included mandatory fast review by Emergency Physician, Medical Physi-cian and Anaesthesist in Emergency Department for ill patients (Dengue Care Pathway), cohorting dengue patient to one ward with mandatory monitoring and review system, clinical management adhering to the Clinical Practice Guideline of Management of Dengue Infection in Adults (2015), referring ill patients to ICU, deployment of nurses and experienced doctors to the dengue ward based on ratio of staff to patients, increasing number of doctors on-call at the dengue ward and a dengue bed manager system led by the Matron and Sisters. The plan was activated by mutual agreement between the Head of Medical Department and the Hospital Director. Results: There was a marked increment of admission of dengue cases into intensive care unit by 59% either directly from emergency department or the dengue wards in 2018 compared to 2017. The mortality rates reduced significantly from 5.4 deaths for every 1000 admission in 2017 to 3.3 in 2018. This is a reduction 2.1 death for every 1000 dengue admission. Conclusion:The implementation of the dengue outbreak preparedness and contingency plan aided the team to provide best care and practice in dengue management especially in the severely ill.
  5. Mohd. Nasir, M. T., Yeo, J., Huang, M. S. L., Koh, M. T., Kamarul Azhar, R., Khor, G. L.
    MyJurnal
    This study determined the association between nutritional status and the use of protease inhibitors (PI)
    containing regimen among HIV-infected children receiving treatment at the referral centres in Klang
    Valley. A total of 95 children currently on antiretroviral (ARV) therapy, aged one to eighteen years, were recruited using purposive sampling. Demographic data, anthropometric measurements, medical history, were collected using a structured questionnaire. Serum micronutrients levels and lipid profile were also examined using blood samples. Mean age was 8.8 3.9 years and 44.2% were on PI. Age ( 2 = 10.351, p = .006), weight-for-age ( 2 = 6.567, p = .010), serum selenium ( 2 = 4.225, p = .040) and HDL-C ( 2 = 7.539, p = .006) were significantly associated with the use of PI. Fewer children on PI were deficient in selenium as compared to those not on PI. On the contrary, more children on PI were underweight and had low HDL-C. The use of PI was found to have both positive and negative effects with better selenium level but poorer HDL-C level and weight status.
  6. Hasmida, M.N., Liza, M. S., Nur Syukriah, A.R., Harisun, Y., Mohd Azizi, C. Y., Fadzilah Adibah, A. M.
    MyJurnal
    Quercus infectoria gall, which is known as manjakani in Malaysia, was traditionally used in treating diseases. The bioactive compounds from the galls can be extracted using various extraction methods. In this study, supercritical carbon dioxide (SC-CO2) extraction was used to study the effects of CO2 flow rate on the yield, total phenolic content and antioxidant activity of Q. infectoria extract by fixing the pressure and temperature at the highest density (P: 30 MPa, T: 40°C). The results were compared with those acquired from the Soxhlet extraction method. The results showed that the Soxhlet extraction had a higher percentage of extraction yield than SC-CO2 extraction. The selectivity of Q. infectoria extracts using SC-CO2 extraction was better than the Soxhlet extraction method. Meanwhile, the extraction efficiency using the SC-CO2 extraction ranged from 46% to 53%. The SC-CO2 extraction also yielded higher total phenolic content than using the Soxhlet extraction method when 2 mL/min of CO2 flow rate was applied (203.53 mg GA/g sample). This study also revealed that the extracts from the SC-CO2 extraction showed a better radical scavenging activity compared to the Soxhlet extraction when analysed using DPPH (2,2-diphenyl-1-picryl hydrazyl) radical scavenging activity assays.radical scavenging activity compared to the Soxhlet extraction when analysed using DPPH (2,2-diphenyl-1-picryl hydrazyl) radical scavenging activity assays.
  7. Ganesananthan S, Rajvinder S, Anil R, Kiew KK, Ng KL, Rosaida MS, et al.
    Med J Malaysia, 2004;59 Suppl C:48.
    Background: Achalasia cardia is an uncommon disease that is often detected late and is associated with significant morbidity. It is a primary esophageal motility disorder diagnosed based on a good history, barium swallow, upper endoscopy and a standard esophageal manometry.
    Materials and Methods: We reviewed complete available records of treatment naïve patients with achalasia cardia from 1st January 2000 till April 2004.
    Results: A total of 40 patients, with average presenting age at 44±16 (range 19-73) years with 14 males: 26 females with 20 Malays: 15 Chinese: 5 Indians, were suitable for further analysis. The classical symptom of dysphagia to liquids and solids were noted in all cases (100%). These patients learnt that water and sometimes-aerated drinks aid in flushing food down. Symptoms of regurgitation (36 patients-90%), heartburn (15 patients-37.5%), weight loss (10 patients–25%), nocturnal cough (16 patient-40%), retrosternal chest discomfort (2 patient-5%) and hemetemesis (2 patient-5%) was noted. One patient had aspiration pneumonia and another had concomitant active pulmonary tuberculosis and 8 had concomitant constipation (20%). In this series the duration of illness before diagnosis was 5±6 (range
    0.3- 30) years and their presenting weight was 53±13 (range 33-82) kg. Barium swallow diagnosed achalasia in 27 patients (67.5%) and a dysmotility disorder in 7 cases (17.5%). There were 10 patients with mega-esophagus and two had epiphrenic diverticulum. There was no pseudoachalasia. Standard esophageal manometry, performed in 36 cases, demonstrated aperistalsis with one vigorous achalasia. The manometric assembly failed to pass through the sphincter in 14 cases and hence LOS assessment was not possible. Four cases demonstrated normal LOS pressure but demonstrated incomplete relaxation (normotensive achalasia). Pneumatic dilatation was performed in 38 newly cases without any complications with excellent symptomatic relief and a 3-12 month post procedural weight gain of 7±5 (range: 0-19) kg. Six patients required a second dilatation and another required two further dilatation. The durability of the total 45 pneumatic dilatations during this short study period was excellent at 24±12 (range 2-48) months.
    Conclusion: A primary esophageal motility disorder must be excluded in any patients who present with dysphagia, with or without regurgitation and a "normal" upper endoscopy. Achalasia is not uncommon, often delayed in diagnosis and has a varied presentation. Although there is no cure for achalasia, but early detection and treatment certainly relieves symptoms and prevents complications. Pneumatic dilatation in our center has excellent durability without any complications.
  8. Sholehah, A. R., Ramle, A., Mohd Tajuddin, A., Wan Rohani, W. T., Jamilah, M. S., Razifah, M.
    MyJurnal
    The prevalence and incidence rate of hypertension among Orang Asli had been increasing due to
    modernization and assimilation of outside practices such as intake of high cholesterol food, alcohol, and
    smoking. Orang Asli utilize their herbs or plants to treat some illness due to the factor of logistics and the
    knowledge on these nature resources since decades ago that is carried out from their ancestors. In this review
    paper, hypertension genes of Orang Asli in Peninsular Malaysia and the utilization of ethno-medicinal plants
    in reducing the clinical manifestation in hypertension were deliberated. There are quite a number of related
    hypertensive genes particularly in renin-angiotensin-aldosterone system (RAAS) playing a pivotal role in
    pathogenesis of hypertension. A genome-wide association studies showed potential candidate genes in
    hypertension among Orang Asli in Peninsular Malaysia. However there is yet molecular study on these genes
    among Orang Asli with their unique genetic profile. Noteworthy information on mechanism of ethnomedicine in treating hypertension are scarce, even the efficacy of modern medicine in treating hypertension
    on Orang Asli are rare. Therefore, study on efficacy of ethno-medicine plant by Orang Asli and the
    regulation effect on hypertension genes are needed to be further explored and elucidated.
  9. Al-Mekhlafi HM, Azlin M, Aini UN, Shaik A, Sa'iah A, Fatmah MS, et al.
    Asia Pac J Clin Nutr, 2005;14(2):188-94.
    PMID: 15927939
    This study aims to determine the prevalence of protein-energy malnutrition and its association with soil-transmitted helminthiases in Orang Asli (Aborigine) children in Selangor, Malaysia. The results obtained from 368 children aged 2-15 years showed that the overall prevalence of mild and significant underweight was 32.1% and 56.5% respectively. The prevalence of mild stunting was 25.6% while another 61.3% had significant stunting. The overall prevalence of mild and significant wasting was 39.0% and 19.5% respectively. The overall prevalence of ascariasis, trichuriasis and hookworm infection were 61.9%, 98.2% and 37.0% respectively and of these 18.9%, 23.5% and 2.5% of the children had severe infection of the respective helminthes. The overall prevalence of giardiasis was 24.9%. The present study vividly shows that stunting and underweight are highly prevalent among Orang Asli children and therefore of concern in this community. In this population intestinal parasitic infections, especially severe trichuriasis and giardiasis, were identified as the main predictors of stunting and wasting respectively, in addition to age between 2 to 6 years.
  10. Grismer LL, Quah ES, Anuar M S S, Muin MA, Wood PL, Nor SA
    Zootaxa, 2014.
    PMID: 24943599 DOI: 10.11646/zootaxa.3815.1.3
    A newly discovered, diminutive, cave-dwelling, lowland species of the colubrid snake genus Lycodon Boie is described from a limestone cave along the Thai-Malaysian border in the state of Perlis, northwestern Peninsular Malaysia. Lycodon cavernicolus sp. nov. is most closely related to L. butleri Boulenger, an endemic, upland, forest-dwelling species from Peninsular Malaysia of the fasciatus group but is separated from L. butleri and all other species of the L. fasciatus group and the closely related L. ruhstrati group by having the combination of 245 (male) and 232 (female) ventral scales; 113 (male) and 92 (female) paired, subcaudal scales; a single precloacal plate; nine or 10 supralabials; 10 or 11 infralabials; a maximum total length of 508 mm (female); a relative tail length of 0.25-0.27; an immaculate venter in juveniles and dark-brown, posterior, ventral scale margins in adults; and dorsal and caudal bands in juveniles white. The discovery of L. cavernicolus sp. nov. adds to a rapidly growing list of newly discovered reptiles from karst regions and limestone forests of Peninsular Malaysia, underscoring the fact that these areas should be studied before they are quarried as they harbor a significant portion of the Peninsular Malaysia's herpetological diversity.
  11. Lua PL, Salek MS, Finlay IG, Boay AGI, Rahimah MS
    Med J Malaysia, 2005 Mar;60(1):28-40.
    PMID: 16250277
    Health-related quality of life (HRQoL) assessment is important in healthcare outcomes. This study aimed to determine the feasibility, reliability and validity of the Malay McGill Quality of Life Questionnaire--Cardiff Short Form (MMQOL-CSF) in advanced cancer population. Patients either completed the MMQOL-CSF alone or in addition to its long version. The study recruited 116 participants (average age = 44 years old). On average, MMQOL-CSF was completed in 5.4 minutes. Most domains showed evidence of reliability (Cronbach's alpha = 0.76-0.92). Correlation with its long version was moderate to strong (r(s) = 0.54-0.87). The MMQOL-CSF was a feasible, reliable and valid HRQoL instrument in this population.
  12. Boo NY, Chandran V, Zulfiqar MA, Zamratol SM, Nyein MK, Haliza MS, et al.
    J Paediatr Child Health, 2000 Aug;36(4):363-9.
    PMID: 10940172
    OBJECTIVES: To identify the types of early cranial ultrasound changes that were significant predictors of adverse outcome during the first year of life in asphyxiated term infants.

    METHODOLOGY: This was a prospective cohort study. Shortly after birth, cranial ultrasonography was carried out via the anterior fontanelles of 70 normal control infants and 104 asphyxiated infants with a history of fetal distress and Apgar scores of less than 6 at 1 and 5 min of life, or requiring endotracheal intubation and manual intermittent positive pressure ventilation for at least 5 min after birth. Neurodevelopmental assessment was carried out on the survivors at 1 year of age.

    RESULTS: Abnormal cranial ultrasound changes were detected in a significantly higher proportion (79.8%, or n = 83) of asphyxiated infants than controls (39.5%, or n = 30) (P < 0.0001). However, logistic regression analysis showed that only three factors were significantly associated with adverse outcome at 1 year of life among the asphyxiated infants. These were: (i) decreasing birthweight (for every additional gram of increase in birthweight, adjusted odds ratio (OR) = 0.999, 95% confidence interval (CI) 0.998, 1.000; P = 0.047); (ii) a history of receiving ventilatory support during the neonatal period (adjusted OR = 8.3; 95%CI 2.4, 28.9; P = 0.0009); and (iii) hypoxic-ischaemic encephalopathy stage 2 or 3 (adjusted OR = 5.8; 95%CI 1.8, 18.6; P = 0.003). None of the early cranial ultrasound changes was a significant predictor.

    CONCLUSIONS: Early cranial ultrasound findings, although common in asphyxiated infants, were not significant predictors of adverse outcome during the first year of life in asphyxiated term infants.

  13. Zamasry MS, Hilmi Z, Mohd Yusof MYP, Razali HSA, Nawawi H, Mahmood MS
    Trop Biomed, 2019 Dec 01;36(4):845-849.
    PMID: 33597456
    Infective endocarditis (IE) is a relatively uncommon disease, but has been challenging to diagnose over the years. With the increasing incidence, variety of causative agents and the resistance of microorganisms towards antibiotics, there is still an occurrence of sudden death due to undiagnosed IE. The most common microorganism causing IE is Staphylococcus aureus. However, there is increasing prevalence of other microorganisms causing IE. This case report highlights a case of sudden death due to IE caused by a rare pathogen, Streptococcus constellatus which belongs to the Streptococcus anginosus group (Milleri group). A study noted the crude incidence of IE in 6 world regions ranged between 1.5 and 11.6 cases per 100,000 people. To date, there has been no previous report on sudden death due to IE caused by Streptococcus constellatus in Malaysia, neither in the forensic nor clinical setting. This case report underlined the characteristics and pathological features of this microorganism. The increasing incidence and variety of causative organisms in IE are important public health issues. It is vital for future studies to examine the risk factors of IE related to Streptococcus constellatus, to enhance better understanding, insight and awareness regarding the course of this disease. This in turn may facilitate preventive measures to avoid morbidity and mortality from this condition.
  14. Ghani AAA, Shahudin MS, Zamri-Saad M, Zuki AB, Wahid H, Kasim A, et al.
    Vet World, 2017 Jun;10(6):630-635.
    PMID: 28717314 DOI: 10.14202/vetworld.2017.630-635
    AIM: The study was conducted at a smallholder goat farm located in Labu, Negeri Sembilan, Malaysia. The objective of this study was to evaluate the effect of proper feeding program on growth performances of replacement breeder goats.

    MATERIALS AND METHODS: A total of 30 healthy female boer cross goats at the age of 4 months old with average initial live body weight (BW) of 20.05±0.5 kg were used for on-farm feeding trial to evaluate the growth performance as preparation for breeding purposes. The experimental goats were divided into two groups of 15 animals each labeled as control and treatment groups, which were kept under intensive farming system. Goats in control group were fed with normal routine feeding protocol practiced by the farmer, while goats in the treatment group were fed with new feed formulation. Throughout the experimental period, on-farm monitoring and data collection were carried out. Initial BW and body condition score (BCS) were recorded before the start of the experiment while final BW and BCS were gained after 7 months of the experimental period. Average daily gain (ADG) was calculated after the experiment end. Data on BW, ADG, and BCS were recorded from both groups for every 2 weeks and reported monthly. The feed intake for the control group was 2.8 kg/animal/day which practiced by the farmer and 3.2 kg/animal/day as new feed formulation for the treatment group.

    RESULTS: After 7 months of the experimental period, final BW shows an improvement in treatment group (39.1±1.53 kg) compared with control group (32.3±1.23 kg). The ADG in treatment group also gives promising result when comparing with control group. Goats in treatment group significantly attained better ADG than control group which were 126.7 g/day and 83.3 g/day, respectively. For the BCS, goats in the treatment group had shown an improvement where 86.67% (13 out of 15) of the group had BCS ≥3 (1-5 scoring scale) and only 66.67% (10 out of 15) of the control group had BCS ≥3.

    CONCLUSION: Therefore, it was concluded that implementation of proper feeding program as shown in treatment group give promising result to improve the growth performance of replacement breeder goats which can be adopted by the farmers to improve farm productivity.

  15. Madihah MS, Ariff AB, Khalil MS, Suraini AA, Karim MI
    Folia Microbiol (Praha), 2001;46(3):197-204.
    PMID: 11702403
    A study of the kinetics and performance of solvent-yielding batch fermentation of individual sugars and their mixture derived from enzymic hydrolysis of sago starch by Clostridium acetobutylicum showed that the use of 30 g/L gelatinized sago starch as the sole carbon source produced 11.2 g/L total solvent, i.e. 1.5-2 times more than with pure maltose or glucose used as carbon sources. Enzymic pretreatment of gelatinized sago starch yielding maltose and glucose hydrolyzates prior to the fermentation did not improve solvent production as compared to direct fermentation of gelatinized sago starch. The solvent yield of direct gelatinized sago starch fermentation depended on the activity and stability of amylolytic enzymes produced during the fermentation. The pH optima for alpha-amylase and glucoamylase were found to be at 5.3 and 4.0-4.4, respectively. alpha-Amylase showed a broad pH stability profile, retaining more than 80% of its maximum activity at pH 3.0-8.0 after a 1-d incubation at 37 degrees C. Since C. acetobutylicum alpha-amylase has a high activity and stability at low pH, this strain can potentially be employed in a one-step direct solvent-yielding fermentation of sago starch. However, the C. acetobutylicum glucoamylase was only stable at pH 4-5, maintaining more than 90% of its maximum activity after a 1-d incubation at 37 degrees C.
  16. Basripuzi NH, Sharma RSK, Norhadila Z, Shahar ZS, Nor-Dilaila MS, Mustapha MS, et al.
    Vet Parasitol, 2020 Oct 15;287:109274.
    PMID: 33086185 DOI: 10.1016/j.vetpar.2020.109274
    This study was conducted to investigate potential interactions between the abomasal blood feeder Haemonchus contortus and the intestinal mucosal browser Trichostrongylus colubriformis among deliberately infected Boer goats. Faecal and blood samples were collected twice a week for eight weeks from 25 parasite-naïve goats. Correlation analysis and multiple linear regression models were conducted to explore the association between phenotypic variables and variables taken at necropsy. Positive associations were identified between total FEC and log T. colubriformis number (r = 0.62, p 
  17. Norhayati M, Al-Mekhlafi HM, Azlin M, Nor Aini U, Shaik A, Sa'iah A, et al.
    Ann Trop Med Parasitol, 2007 Sep;101(6):547-50.
    PMID: 17716439
  18. Khoo CK, Norlina D, Roshaslinda D, Iti Suraya Hani M MS, Zunaida B, Mohd Hasrul AH, et al.
    Trop Biomed, 2021 Dec 01;38(4):499-504.
    PMID: 35001917 DOI: 10.47665/tb.38.4.095
    African swine fever (ASF) is a transboundary haemorrhagic viral disease that affected domestic and wild pigs of all ages. The disease is caused by African swine fever virus (ASFV) and was introduced to China in 2018 before spreading rapidly to neighbouring Asian countries. As such, putting countries free from ASF like Malaysia at risk. ASF is highly lethal with no vaccine or treatment available. In February 2021, we confirmed backyard pigs from various locations in Sabah were infected with ASF using real time polymerase chain reaction (real- time PCR). Further characterization of the Sabah ASFVs indicated that they were of p72 genotype II with intergenic region (IGR) variant II that displayed an addition tandem repeat sequence (TRS) insertion, similar to ASFV from Indonesia, V ietnam and China. These results indicate and support the transboundary expansion of a homogenotypic ASFV (p72 genotype II and IGR variant II) in the Europe and Asia-Pacific, emphasizing the need for a holistic international collaboration in control and preventing further spreading of the current ASF pandemic. Importantly, our results informed the first detection and characterization of ASF, a disease previously not detected in Malaysia. This information is crucial for further mitigation and preventive measures.
  19. Chowdhury MS, Rahman KS, Selvanathan V, Hasan AKM, Jamal MS, Samsudin NA, et al.
    RSC Adv, 2021 Apr 15;11(24):14534-14541.
    PMID: 35423997 DOI: 10.1039/d1ra00338k
    Organic-inorganic perovskite solar cells (PSCs) have recently emerged as a potential candidate for large-scale and low-cost photovoltaic devices. However, the technology is still susceptible to degradation issues and toxicity concerns due to the presence of lead (Pb). Therefore, investigation on ideal methods to deal with PSC wastes once the device attains its end-of-life is crucial and to recycle the components within the cell is the most cost effective and energy effective method by far. This paper reported on a layer-by-layer extraction approach to recycle the fluorine-doped tin oxide (FTO) coated glass substrate which is the most expensive component in the device architecture of mesoporous planar PSC. By adapting the sequential removal of each layer, chemical properties of individual components, including spiro-OMeTAD and gold can be preserved, enabling the material to be easily reused. It also ensured that the toxic Pb component could be isolated without contaminating other materials. The removal of all individual layers allows the retrieval of FTO conductive glass which can be used in various applications that are not only restricted to photovoltaics. Comparison of electrical, morphological and physical properties of recycled FTO glasses to commercial ones revealed minimal variations. This confirmed that the recycling approach was useful in retrieving the substrate without affecting its physicochemical properties.
  20. Siraz MMM, Das SK, Mondol MS, Alam MS, Al Mahmud J, Rashid MB, et al.
    Environ Monit Assess, 2023 Apr 17;195(5):579.
    PMID: 37067680 DOI: 10.1007/s10661-023-11223-8
    Bangladesh is a rapidly developing country, which is vulnerable to various types of pollution due to the large-scale industrial and associated human activities that might potentially affect the locally harvested foodstuffs. Therefore, the transfer factor is an essential tool to assess the safety of foodstuffs due to the presence of natural radioactivity in environmental matrix and/or strata. This is a first study of its kind conducted in a well-known region for mango farming in Bangladesh, measuring the uptake of naturally occurring radioactive materials (NORMs) by grass and mango from soil to assess the ingestion doses to humans. The HPGe gamma-ray detector was used to determine the concentrations of NORMs in samples of soil (20), grass (10), and mango (10), which were then used to calculate the transfer factors of soil to grass and soil to mango. Average activity concentrations of 226Ra, 232Th, and 40K in associated soil samples (47.27 ± 4.10, 64.49 ± 4.32, 421.60 ± 28.85) of mango and 226Ra and 232Th in associated soil samples (45.07 ± 3.93, 52.17 ± 3.95) of grass were found to exceed the world average values. The average transfer factors (TFs) for mango were obtained in the order of 40K(0.80) > 226Ra (0.61) > 232Th (0.31), and for grass, it shows the order of 40K (0.78) > 232Th (0.64) > 226Ra (0.56). However, a few values (3 mango samples and 3 grass samples) of the estimated TFs exceeded the recommended limits. Moreover, Bangladesh lacks the transfer factors for most of the food crops; therefore, calculation of TFs in the major agricultural products is required all over Bangladesh, especially the foodstuffs produced near the Rooppur Nuclear Power Plant, which is scheduled to be commissioned in 2023.
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