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  1. Fulltext Plasma Cystatin C and estimates of Glomerular filtration rate using Cystatin C independently diagnose acute kidney injury in critically ill patients with Sepsis
    Azrina Md Ralib, Iqbalmunawwir Ab Rashid, Nur Aisyah Ishak, Suhaila Nanyan, Nur Fariza Ramly, Mohd Basri Mat Nor
    International Medical Journal Malaysia, 2017;16(11):8-8.
    MyJurnal
    Plasma Cystatin C (CysC) is as an early functional marker for acute kidney
    injury. Estimates of glomerular filtration rate using CysC (eGFRCysC) has been used in
    some clinical setting. We evaluated the utility of CysC and eGFRCysC in diagnosing acute
    kidney injury (AKI) and predicting death in critically ill patients with sepsis. (Copied from article).
  2. Fulltext Towards developing and validating Quality Physical Education in schools-The Asian physical education professionals' voice
    Ho WKY, Ahmed MD, Khoo S, Tan CH, Dehkordi MR, Gallardo M, et al.
    PLoS One, 2019;14(8):e0218158.
    PMID: 31369586 DOI: 10.1371/journal.pone.0218158
    Physical education professionals aim to develop quality programmes for physical education. This study aimed to develop and validate a scale using professionals' perceptions of Quality Physical Education QPE in Asia using twenty-four items regarding QPE quality issues. The items covered status and roles, development of educational elements and supportive features in physical education. A sample of N = 799 sport and physical education professionals from eleven Asian cities participated in this questionnaire survey. Twenty-four items relating to QPE were examined via exploratory factor analysis (EFA) using maximum likelihood extraction and direct oblimin rotation methods. Nevertheless, only 20 items were extracted following the EFA examination. Items 1, 9, 14 and 18 were excluded because of low factor loadings. The remaining items were clustered into four subscales: Development and Supportive Elements for Quality Physical Education in Schools (DSFQPE; α = .918), Core Values of Quality Physical Education (CVPE; α = .908), Curriculum Arrangement of Physical Activities (CAPA; α = .884) and Provision and Norms in Physical Education (PNPE; α = .865). The Cronbach's alpha coefficient (α = .875) indicated excellent internal consistency for the overall measure. Furthermore, the 4 retained factors from the EFA were assessed via robust confirmatory factor analysis (CFA). The 4-factor model demonstrated a good fit with the data (CMIN/DF = 3.450, CFI = .928, TLI = .916, PCFI = .801, RMSEA = .078). The study identified a 4-factor structure with internal consistency and acceptable interfactor correlations. The structure seemed to be applicable, including the twenty items identified as useful and necessary tools for the framework of analysis in the investigation of diverse settings for the study of quality physical education.
  3. Fulltext Aqua zumba versus aqua jogging: comparative effects on health parameters among obese middle aged women
    Sarina Md. Yusof, Maisarah Shari, Zulkifli Kadir, Aishah Adam, Teh, Lay Kek, Suhana Aiman, et al.
    Movement Health & Exercise, 2018;7(2):11-21.
    MyJurnal
    Background: Obesity is major contributor to diseases and mortality. Constant weight loss significantly reverses diseases related to obesity and helps prolong human life expectancy. To date, there has been limited scientific evidence comparing the effectiveness of the Aqua Zumba® Fitness program and conventional aqua jog among obese women. Thus, the purpose of this study is to compare the effects between 12 weeks of Aqua Zumba® Fitness and aqua jog on health parameters among middle-age women. Methods: A total of sixty sedentary obese women (BMI >30 kg/m2), aged 40-59 years old were randomized to either Aqua Zumba® Fitness (AZ, n=20), aqua jog (AJ, n=20) or control group (C, n=20). Exercise groups were involved in different 12-week aqua exercise programs, 3 times per week, 60 minutes per session, with an intensity of 50-75% of maximum heart rate. Body mass (BM), skeletal muscle mass (SMM), body fat percentage (BF%), waist circumference (WC), upper and lower body strength (UBS and LBS), cardiorespiratory fitness (CRF), and flexibility were measured at baseline (week-0) and post-exercise intervention (week-13). Result: The AZ group demonstrated significant changes (p
  4. Morphological variations of plicofollis species (siluriformes: ariidae) in Peninsular Malaysia: an insight into truss network approach
    Siti Waznah Abdurahman, Mohd Azmi Ambak, Shahreza Md Sheriff, Ying GS, Ahmad Azfar Mohamed, Ahmed Jalal Khan Chowdhury
    Sains Malaysiana, 2016;45:1-7.
    Ariid catfishes, belong to family Ariidae is considered as one of the taxonomically problematic groups, which is still under review by fish taxonomist globally. Species level identification of some ariids often resulted in species misidentification because of their complex characters and very similar morphological characters within genera. A vigilant and detail observation is very important during the species level identification of ariid species. In these contexts, this study was carried out in order to determine the morphological variations of one of the ariid genera, Plicofollis, which have been giving misleading taxonomic information in the south-east Asian countries. A Truss network technique was used throughout the study period. The study was conducted based on 20 truss measurements using 22 to 23 specimens per species, namely P. argyropleuron, P. nella and P. tenuispinis found in Peninsular Malaysian waters. Morphological variations were determined using a multivariate technique of discriminant function analysis (DFA). The results obtained in this study showed that discriminant analysis using truss network measurements has produced very clear separations of all the species in Plicofollis group. Several important morphological characters have been identified, which represent body depth and caudal regions of the fish. The documentary evidences of these variables could be considered as the constructive functional features, which could enable us to assess more accurately to distinguish the species within this complex Ariidae family.
  5. Control of microbiologically influenced corrosion using ultraviolet radiation
    Akrima Abu Bakar, Muhammad Khairool Fahmy Mohd Ali, Norhazilan Md. Noor, Nordin Yahaya, Mardhiah Ismail, Ahmad Safuan A. Rashid
    Sains Malaysiana, 2017;46:1323-1331.
    Baram Delta Operation had been producing oil and gas since 1960's and serious pipelines failure was reported in the year of 2005. The final investigation has concluded that one of the species of bacteria that has been identified to cause microbiologically influenced corrosion, specifically known as sulfate reducing bacteria (SRB) was found to be one of the potential contributing factors to the incidents. This work investigates the potential use of ultraviolet (UV) radiation to inhibit the SRB consortium that was cultivated from the crude oil in one of the main trunk lines at Baram Delta Operation, Sarawak, Malaysia. The impact of UV exposure to bio-corrosion conditions on carbon steel coupon in certain samples for 28 days was discussed in this study. The samples were exposed to UV radiation based on variations of parameters, namely: time of UV exposure; and power of UV lamp. The significant changes on the amount of turbidity reading and metal loss of the steel coupon were recorded before and after experiment. The results showed that SRB growth has reduced rapidly for almost 90% after the UV exposure for both parameters as compared to the abiotic samples. Metal loss values were also decreased in certain exposure condition. Additionally, field emission scanning electron microscopy (FESEM) coupled with energy dispersive spectroscopy (EDS) was performed to observe the biofilm layer formed on the metal surface after its exposure to SRB. The evidence suggested that the efficiency of UV treatment against SRB growth could be influenced by the particular factors studied
  6. Macronutrients and sugar content in foods and beverages from three selected zones in peninsular Malaysia
    Rosmawati Dora, Hasnah Haron, Muhamad Fikri Mohd Fauzi, Suzana Shahar, Chong CP, Mohd Fairulnizal Md Noh
    Sains Malaysiana, 2018;47:1557-1562.
    This study was conducted to determine the content of macronutrients and sugar in 30 types of food selected from three
    zones in Peninsular Malaysia. The food samples consisted of 14 types of processed foods and beverages, 8 types of
    fruits and 10 types ready to eat food. Each type of food and drink were purchased from selected restaurants, stores and
    supermarkets from three different zones which were North zone (Perak), Central zone (Selangor) and South Zone (Johor).
    Methods used for proximate analysis were based on the standard methods of AOAC (1997) while the total carbohydrate
    was calculated by difference method. Total calories were calculated using Atwater method. Total sugar content were
    analysed using high performace liquid chromatography (HPLC). Dietary fibre contents were determined by using a
    combination of enzyme-gravimetric methods (AOAC 985.29 and AACC 32-05). The results showed that peanut butter has
    the highest value of fat (44.75 ± 7.59 g/100 g), total calorie (611 ± 38 kcal /100 g) and dietary fibre contents (8.07 ± 0.98
    g/100 g). Highest protein content (21.98 ± 2.57 g/100 g) was found in low-fat milk powder. The highest carbohydrate
    (97.48 ± 1.47 g/100 g) and total sugar (86.7 ± 2.9 g/100 g) contents were found in palm sugar. The results of this study
    will update and add up to the data for the Malaysian Food Composition Table and can provide useful information in
    choosing healthy foods based on the nutrient contents of the food.
  7. Fulltext Correction to: Factors influencing childhood anaemia in Bangladesh: a two level logistic regression analysis
    Yusuf A, Mamun ASMA, Kamruzzaman M, Saw A, Abo El-Fetoh NM, Lestrel PE, et al.
    BMC Pediatr, 2019 Jul 26;19(1):258.
    PMID: 31349810 DOI: 10.1186/s12887-019-1607-3
    Following publication of the original article [1], the authors reported that name that appeared in published online version is incorrect.
  8. Fulltext Validation of the malay version of the snyder hope scale among malaysian cancer patients
    Rohayu Hami, Noorsuzana Mohd Shariff, Siti Shahanis Md Sharif, Appalanaido, Gokula Kumar, Nizuwan Azman, Mohammad Farris Iman Leong Abdullah
    Jurnal Sains Kesihatan Malaysia, 2018;16(1):95-102.
    MyJurnal
    Hope leads to lower depression and anxiety and is associated with improved quality of life of cancer patients. In this
    study, Hope Scale (HS) was translated into Malay, and the psychometric properties of the Malay version of the Hope
    Scale were investigated among Malaysian cancer patients. Concurrent translation and back translation of the original
    English version of the Hope Scale were performed, and the Malay version was administered to 195 cancer patients
    with different cancer diagnoses at baseline assessment and 2 months later at follow-up. The Hope Scale (Malay) total
    score (Cronbach’s α = 0.72; intraclass correlation coefficient (ICC) = 0.67) and its domains (Cronbach’s α [pathway] =
    0.7; Cronbach’s α [agency] = 0.7; ICC[Pathway] = 0.64; ICC[Agency] = 0.70) demonstrated acceptable internal consistencies and
    test-retest reliability. Convergent and discriminant validities were also achieved by the Hope Scale (Malay). The Hope
    Scale (Malay) demonstrated construct validity, as confirmatory factor analysis demonstrated that the items in the Hope
    Scale (Malay) best fit into two domains, which was true for the original English version. The Hope Scale (Malay) had
    acceptable psychometric properties and thus is suitable for assessing hope in Malaysian cancer patients.
  9. Daunorubicin oral bioavailability enhancement by surface coated natural biodegradable macromolecule chitosan based polymeric nanoparticles
    Ahmad N, Ahmad R, Alam MA, Ahmad FJ, Amir M, Pottoo FH, et al.
    Int J Biol Macromol, 2019 May 01;128:825-838.
    PMID: 30690115 DOI: 10.1016/j.ijbiomac.2019.01.142
    BACKGROUND: Daunorubicin hydrochloride (DAUN·HCl), due to low oral bioavailability poses the hindrance to be marketed as an oral formulation.

    AIM OF THE STUDY: To develop a natural biodegradable macromolecule i.e. Chitosan (CS)-coated-DAUN-PLGA-poly(lactic-co-glycolic acid)-Nanoparticles (NPs) with an aim to improve oral-DAUN bioavailability and to develop as well as validate UHPLC-MS/MS (ESI/Q-TOF) method for plasma quantification and pharmacokinetic analysis (PK) of DAUN.

    RESULTS: A particle size (198.3 ± 9.21 nm), drug content (47.06 ± 1.16 mg/mg) and zeta potential (11.3 ± 0.98 mV), consisting of smooth and spherical shape was observed for developed formulation. Cytotoxicity studies for CS-DAUN-PLGA-NPs revealed; a comparative superiority over free DAUN-S (i.v.) in human breast adenocarcinoma cell lines (MCF-7) and a higher permeability i.e. 3.89 folds across rat ileum, as compared to DAUN-PLGA-NPs (p 

  10. Fulltext Implementation of ambulance hotspot strategy in reducing ambulance response time
    Su Na Chin, Phee Kheng Cheah, Muhamad Yaakub Arifin, Hui Shan Kang, Zaturrawiah A Omar, Fouziah Md Yassin, et al.
    Borneo Journal of Medical Sciences, 2020;3(101):3-4.
    MyJurnal
    Ambulance response time (ART) has an inseparable relationship with mortality rates and therefore is important to be reduced. However, an unprecedented increase in road traffic congestion has led to longer ART, especially during peak hours. To reduce ART despite congested traffic, a pre-dispatched ambulance is deployed at hotspot locations during peak hours. This study aims to determine if the hotspot strategy is able to reduce ART in an Urban Emergency Medical Services system.
  11. Fulltext Smart Logbook as alternative solution for continouos industrial training supervision problem: a purview study on student’s perception
    Sulaiman Mahzan, Siti Fairuz Nurr Sadikan, Mohd Ab Malek Md Shah, Mohd Harun Shahudin, Zaini Saat, Shamsol Shafie
    Jurnal Inovasi Malaysia, 2020;4(1):113-132.
    MyJurnal
    Supervision and monitoring of practical students are among the pertinent components in the management of industrial training among students in institutions of higher learning (IPT) in Malaysia. The easiest way to monitor is by reporting such students’ daily activities in their logbooks. Due to the dispersal of offshore industries, it directly impacts to students, institution and industry such as management costs, wastes supervision time for travel and stresses other factors in managing industry supervision such as ongoing supervision, verification of customization of industry entities regarding needs and reduction of allocation by IPT. Thus, a new mechanism needs to be implemented by considering the advantages and benefits that can be developed throughout the use of information technology (IT). In conjunction with this circumstance, a Smart LogBook prototype has been developed to address the problems encountered in the supervision process of the industry training students as stated. A study of students’ perceptions of the Smart Logbook prototype was also tailored to assess student perception compared to using supervisory methods using the old logbook. The Rapid Application Development (RAD) methodology was used in software development while a set of questionnaires was distributed to 65 respondents to obtain their assessment feedback data. The findings show that students have a positive assessment of their perception of the use of this prototype.
  12. Fulltext Reducing painful experiences in neonates during routine minor procedures in special care nursery: A quality improvement project
    Salwana Ku Md Saad, Koik, Boon Hong, Nur Faradilla Mohamad Bakri, Abdul Nasir Mohamed Abdul Kadher, Karniza Khalid
    Q Bulletin, 2020;1(29):4-14.
    MyJurnal
    Neonates in Special Care Nursery (SCN) are constantly exposed to routine procedures that are painful. Repetitive painful exposures in neonates are known to have long-term deleterious effects that may surpass adulthood. A quality improvement project was designed to reduce the pain experienced by neonates during routine minor procedures in SCN unit of Hospital Tuanku Fauziah (HTF), a tertiary state hospital in Perlis, Malaysia. The Neonatal Infant Pain Scale (NIPS) was used as a pain assessment tool in neonates throughout the study. Several factors contributing to neonatal painful experience during routine procedures were identified, including poor awareness on neonatal pain perception, poor procedural etiquette among paediatric house officers, and lack of non-pharmacological pain relief used during the procedures. Interventional measures included adjunctive use of non-nutritive sucking via orthodontic Avent® pacifier, use of adjustable swaddling blanket via SwaddleMe® size S, and introduction of a clinical training module for the house officers. There were 159 neonates recruited in the pre-intervention period and 163 neonates evaluated in the post-intervention period. Our study revealed a significant decrease in neonatal painful experience during routine procedures, from 49.7% to 17.8% (p
  13. Fulltext Comparison of the catching results of mini one-boat and two-boat purse seine in Bali strait, Muncar, east java province
    Ihsan, Yudi Nurul, Khoirunisa, Nita Ulfah, Riyantini, Indah, Elfithri, Rahman, Pribadi, Tri Dewi K., Siti Nor Aisyah Md Bati
    Malaysian Journal of Applied Sciences, 2020;5(1):8-14.
    MyJurnal
    Mini purse seine has a major contribution in increasing production of small pelagic catches in Pelabuhan Perikanan Pantai (PPP) Muncar. This research aimed to investigate the effectiveness and efficiency of mini one-boat and two-boat purse seine in Bali Strait, Indonesia. This research was conducted in Mei 2018 in Muncar, East Java, Indonesia. In this study, survey was used to get the data by distributed the questioners to the fisherman. The primary data are total catch composition, fork length, individual weight of total catch and operation time of both fishing gears. Data were analysed by main catch and bycatch proportion, legal size proportion and catch rate. The results showed that the mini two-boat purse seine had a greater catch volume compared to the mini one-boat purse seine. The bycatch composition dominates in both fishing gear. The proportion of legal-size catching is 67% of the total. The fork length is not significantly different and for the total catches is significantly different. The catching rate of the mini purse seine one boat catch rate is lower at 4,048.67 kg/hour, compared to the mini two-boat purse seine which is 9,189.18 kg/hour.
  14. Two-year surveillance of tilapia lake virus (TiLV) reveals its wide circulation in tilapia farms and hatcheries from multiple districts of Bangladesh
    Debnath PP, Delamare-Deboutteville J, Jansen MD, Phiwsaiya K, Dalia A, Hasan MA, et al.
    J Fish Dis, 2020 Nov;43(11):1381-1389.
    PMID: 32851674 DOI: 10.1111/jfd.13235
    Tilapia lake virus (TiLV) is an emerging pathogen in aquaculture, reportedly affecting farmed tilapia in 16 countries across multiple continents. Following an early warning in 2017 that TiLV might be widespread, we executed a surveillance programme on tilapia grow-out farms and hatcheries from 10 districts of Bangladesh in 2017 and 2019. Among farms experiencing unusual mortality, eight out of 11 farms tested positive for TiLV in 2017, and two out of seven tested positive in 2019. Investigation of asymptomatic broodstock collected from 16 tilapia hatcheries revealed that six hatcheries tested positive for TiLV. Representative samples subjected to histopathology confirmed pathognomonic lesions of syncytial hepatitis. We recovered three complete genomes of TiLV from infected fish, one from 2017 and two from 2019. Phylogenetic analyses based on both the concatenated coding sequences of 10 segments and only segment 1 consistently revealed that Bangladeshi TiLV isolates formed a unique cluster within Thai clade, suggesting a close genetic relation. In summary, this study revealed the circulation of TiLV in 10 farms and six hatcheries located in eight districts of Bangladesh. We recommend continuing TiLV-targeted surveillance efforts to identify contaminated sources to minimize the countrywide spread and severity of TiLV infection.
  15. Fulltext A review: muscle discomfort of police officers in vehicles
    Nur Athirah Diyana, Irniza Rasdi, Vivian How, Karmegam Karuppiah, Shamsul Bahri Mohd Tamrin, Sivasankar S., et al.
    Malaysian Journal of Medicine and Health Sciences, 2019;15(103):96-98.
    MyJurnal
    This paper studies the muscle discomfort among police officers when carrying out their work. The objective of this study is to give a basic introduction of ergonomic problems in among police officers and risk controls in relation to minimize the ergonomics risk factors. This paper gives quick review of muscle discomfort problems and prevalence of musculoskeletal disorders (MSD) among police officer. An ergonomic application has been purposed in the liter- ature to solve the problem related with design of mechanical.
  16. Fulltext Data set on trace metals in surface sediment and water from a sub-tropical estuarine system, Bay of Bengal, Bangladesh
    Hossain MB, Habib SB, Hossain MS, Jolly YN, Kamal AHM, Idris MH, et al.
    Data Brief, 2020 Aug;31:105911.
    PMID: 32637507 DOI: 10.1016/j.dib.2020.105911
    Meghna River Estuary, the largest estuarine system (GBM, Ganges-Brahmaputra-Meghna) in Bangladesh, is a major spawning ground of national fish, Hilsha shad. In this study, we collected 24 surface sediment and 24 water samples from the entire lower estuary (4 sites, 3 sampling points from each site, 2 replicas from each sampling point) to detect trace/heavy metals. Sediment samples were collected from the top surface soil (0-5 cm) using Ekman grab sampler and water samples from 5 cm below the surface layer using plastic water bottles. After collection, sediment and water samples were preserved as necessary using HNO3 (for water). Immediately after reaching the laboratory, sediment samples were dried in an oven at 70°C until the constant weight gained. The metals were then analyzed using energy-dispersive X-ray fluorescence method (EDXRF) and calculated the metal concentrations. In total, 12 metals were detected and the average value (mg/Kg) of all metals for sediment samples followed the descending order of Fe > Ca > K >Ti >Sr >Zr >Rb> Cu > Zn >Pb >As > Ni, and for water the order (µg/mL) of Fe >Ti > Ca > Co >Mn > Ni > Zn >Sr > Cu > As > Se . Besides, several physicochemical parameters i.e. water pH, soil pH, temperature, salinity, dissolved oxygen, hardness, and alkalinity of the 12 sampling points were also measured in-situ using handheld instruments.
  17. Fulltext Abdominal obesity and high-sensitivity c-reactive protein level among malay obese adults in Kuantan, Malaysia
    Siti Zuhaidah Shahadan, Muhammad Lokman Md. Isa, Azlina Daud, Ali Aminuddin Mohd Rasani, Muhammad Ibrahim, Samsul Deraman
    International Medical Journal Malaysia, 2018;17(1):79-86.
    MyJurnal
    Introduction: Abdominal obesity and inflammation are two independent risk factors for cardiovascular disease. However, the inter-relationship between these two factors among Malay population is fragmented. The purpose of this study is to determine the association between waist circumference as a measure of abdominal obesity and high-sensitivity C-reactive protein as an indicator of inflammation status among Malay obese adults in Kuantan, Pahang. Materials and Methods: Ninety-three apparently healthy obese adults (BMI between 27.5 and 39.9 kg/m2 ) aged between 20 to 62 years old were recruited in this study (68% men and 32% women). Circumference tape was used to measure the waist circumference and fasting venous blood was obtained to determine the high-sensitivity C-reactive protein level. Results: On average, the waist circumference of obese men and women was 103 cm (SD = 8.7) and 94 cm (SD = 7.0), respectively. The median (IQR) of the hs-CRP level of the study participant was 3.80 mg/L (1.5, 10.1). The Kendall’s Tau correlation reveals that there is a significant positive linear correlation between waist circumference and hs -CRP level in obese men (r (30) = 0.355, p = 0.006) and women (r (63) = 0.177, p = 0.043). Conclusion: There is a significant inter-relationship between waist circumference and hs-CRP level among apparently healthy obese adults in Kuantan, Pahang. This study suggests that assessment of hs-CRP level is beneficial to predict the risk for future cardiovascular disease event and facilitate the management of obesity in this population. A prospective clinical study is recommended to confirm the findings.
  18. Fulltext Effects of different roasting parameters on selected physicochemical properties and sensory evaluation of coffee beans
    Nur Fatin Najihah Md Sobri, Nur Fazliana Mohd Nazri, Nurpatin Syuhada Sumani, Nurul Adlin Azaman Shah, Naemaa Mohamad, Nadya Hajar
    Journal of Academia Universiti Teknologi MARA Negeri Sembilan, 2019;7(2):130-137.
    MyJurnal
    Arabica coffee beans from the same origin were roasted at three different roasting parameters namely minimum roasting (180°C), medium roasting (220°C) and maximum roasting (260°C) each for 20 minutes in order to investigate the changes in the physical, chemical and sensorial evaluation. During the roasting process, the coffee beans becomes more brittle due to the chemical, physical and structural modifications. There are limited studies reported for coffee beans that have been roasted with different roasting parameters in term of selected physicochemical properties and sensory evaluation. The roasted coffee beans oil was extracted by using Soxhlet Extraction method for 8 hours. The objective of this study was to determine the effects of different roasting parameters on selected physicochemical properties and sensory evaluation of coffee beans in the term of: moisture content (%), oil extraction (%), peroxide value (mEq/kg), acid value (mg KOH/g), furan (absorbance) and sensory evaluation. The furan (abs) content was recorded as 0.24 ± 0.04 (minimum roasting),
    0.69 ± 0.03 (medium roasting) and
    0.91 ± 0.01 (maximum roasting). In terms of sensory evaluation, most participants preferred coffee drink made from medium roasted coffee beans for aroma, colour, sweetness, flavour and overall criteria. Meanwhile, for the acidity and bitterness criteria, the participants preferred coffee drink made from maximum roasted coffee beans. As a conclusion, roasting temperature is the main factor that influences the physicochemical properties and sensory evaluation of coffee beans.
  19. Facile synthesis of CuO/CdS heterostructure photocatalyst for the effective degradation of dye under visible light
    Hossain SS, Tarek M, Munusamy TD, Rezaul Karim KM, Roopan SM, Sarkar SM, et al.
    Environ Res, 2020 09;188:109803.
    PMID: 32590149 DOI: 10.1016/j.envres.2020.109803
    In this work, the photocatalytic property of p-type CuO was tailored by creating a heterojunction with n-type CdS. The CuO/CdS nanocomposite photocatalyst was synthesized by the ultrasound-assisted-wet-impregnation method and the physicochemical and optical properties of the catalysts were evaluated by using N2 physisorption, X-Ray Diffraction (XRD),X-Ray Photoelectron Spectroscopy (XPS), Raman spectroscopy, Transmission electron microscopy (TEM), Energy dispersive X-Ray (EDX) mapping, Field Emission Scanning Electron Microscope (FE-SEM), UV-Vis and photoluminescence spectroscopy experiments. Detailed characterization revealed the formation of a nanocomposite with a remarkable improvement in the charge carrier (electron/hole) separation. The photocatalytic degradation efficiencies of CuO and CuO/CdS were investigated for different dyes, for instance, rhodamine B (RhB), methylene blue (MLB), methyl blue (MB) and methyl orange (MO) under visible light irradiation. The obtained dye degradation efficiencies were ~93%, ~75%, ~83% and ~80%, respectively. The quantum yield for RhB degradation under visible light was 6.5 × 10-5. Reusability tests revealed that the CuO/CdS photocatalyst was recyclable up to four times. The possible mechanisms for the photocatalytic dye degradation over CuO/CdS nanocomposite were elucidated by utilizing various scavengers. Through these studies, it can be confirmed that the conduction band edges of CuO and CdS play a significant role in producing O2-. The produced O2- degraded the dye molecules in the bulk solution whereas the valence band position of CuO acted as the water oxidation site. In conclusion, the incorporation of CuO with CdS was demonstrated to be a viable strategy for the efficient photocatalytic degradation of dyes in aqueous solutions.
  20. Fulltext Knowledge, attitudes, and practices toward the novel coronavirus among Bangladeshis: Implications for mitigation measures
    Paul A, Sikdar D, Hossain MM, Amin MR, Deeba F, Mahanta J, et al.
    PLoS One, 2020;15(9):e0238492.
    PMID: 32877449 DOI: 10.1371/journal.pone.0238492
    The current novel coronavirus (nCoV) pandemic, COVID-19, was first reported in December 2019 in Wuhan, China, and has spread globally, causing startling loss of life, stalling the global economy, and disrupting social life. One of the challenges to contain COVID-19 is convincing people to adopt personal hygiene, social distancing, and self-quarantine practices that are related to knowledge, attitudes, and practices (KAP) of the residents of respective countries. Bangladesh, a densely populated country with a fast-growing economy and moderate literacy rate, has shown many hiccups in its efforts to implement COVID-19 policies. Understanding KAP may help policy makers produce informed decisions. This study assessed KAP in relation to COVID-19 in Bangladesh. An online survey using a pre-tested questionnaire conducted in late March 2020 attained 1,837 responses across Bangladesh. Ultimately, 1,589 completed responses were included in a statistical analysis to calculate KAP scores and their interrelations with sociodemographic variables. The overall KAP was poor, with only 33% of the participants demonstrating good knowledge, whereas 52.4% and 44.8% of the subjects showed good attitudes and practices, respectively. Sociodemographic factors had strong bearings on the KAP scores. Significantly higher KAP scores were evident in females over males, among aged 45 years and older over younger participants, and among retired workers and homemakers over students and public service employees. This study indicated a panic fuelled by poor understanding of COVID-19 associated facts and the need for the government to ensure more granular and targeted awareness campaigns in a transparent and factual manner to foster public confidence and ensure more meaningful public participation in mitigation measures. This study provides a KAP baseline regarding COVID-19 among Bangladeshis.
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