Browse publications by year: 2020

  1. Brown NW, Orchard G, Rhodes A
    Br J Biomed Sci, 2020 Oct;77(4):159-167.
    PMID: 33252323 DOI: 10.1080/09674845.2020.1827578
    Each year the British Journal of Biomedical Science publishes a 'What have we learned' editorial designed to introduce readers within the major disciplines of laboratory medicine to developments outside their immediate area. In addition it is designed to inform a wider readership of the advances in the diagnosis and treatment of disease. To this end, in 2020 the journal published 39 articles covering the disciplines within Biomedical Science in the 4 issues comprising volume 77. These included a review of COVID-19 in this issue, 27 original articles, 6 Biomedical Science 'In Brief' and 4 case histories. 27 of the articles involved molecular techniques, with one of these comparing results with a mass spectrometry based method. The preponderance of molecular genetic studies gives us a good idea of the likely future direction of the disciplines.
    MeSH terms: Humans; Peer Review, Research/trends*; Biomedical Research/trends*; Pandemics*
  2. Teo SK, Mohd Khialdin S, Yong MH, Othman O, Ami M
    Optom Vis Sci, 2020 Dec;97(12):1018-1022.
    PMID: 33252541 DOI: 10.1097/OPX.0000000000001607
    SIGNIFICANCE: Ocular tilt reaction (OTR) is an abnormal eye-head postural reaction that consists of skew deviation, head tilt, and bilateral ocular torsion. Understanding of the pathway of the vestibulo-ocular reflex (VOR) is essential because this will help to localize the pathology.

    PURPOSE: The aim of this study was to report a case of OTR with contralateral internuclear ophthalmoplegia (INO) and fifth and seventh cranial nerve palsies.

    CASE REPORT: A 51-year-old gentleman with underlying diabetes mellitus presented with sudden onset of diplopia for 3 days. On examination, his visual acuity was 20/30 bilaterally without a relative afferent pupillary defect. He had a right OTR consisting of a right head tilt, a skew deviation with a left eye hypertropia, and bilateral ocular torsion (right excyclotorsion and left incyclotorsion) with nystagmus. He also had a left adduction deficit and right abduction nystagmus consistent with a left INO. Ocular examination revealed evidence of proliferative diabetic retinopathy bilaterally. Two days after the initial presentation, the patient developed left seventh and fifth cranial nerve palsies. MRI showed left pontine infarction and multiple chronic lacunar infarctions. There was an incidental finding of a vascular loop compression on cisternal portions of the left trigeminal, facial, and vestibulocochlear nerves. Antiplatelet treatment was started on top of a better diabetic control. The diplopia was gradually resolved with improved clinical signs. In this case, the left pontine infarction had likely affected the terminal decussated part of the vestibulocochlear nerve from the right VOR pathway, medial longitudinal fasciculus, and cranial nerve nuclei in the left pons.

    CONCLUSIONS: The OTR can be ipsilateral to the lesion if the lesion is before the decussation of the VOR pathway in the pons, or it can be contralateral to the lesion if the lesion is after the decussation. In case of an OTR that is associated with contralateral INO and other contralateral cranial nerves palsy, a pathology in the pons that is contralateral to the OTR should be considered. Neuroimaging study can hence be targeted to identify the possible cause.

    MeSH terms: Diplopia/diagnosis; Diplopia/etiology; Diplopia/physiopathology; Facial Nerve Diseases/diagnosis; Facial Nerve Diseases/etiology*; Facial Nerve Diseases/physiopathology; Head*; Humans; Male; Middle Aged; Platelet Aggregation Inhibitors/therapeutic use; Posture*; Reflex, Vestibulo-Ocular/physiology; Strabismus/diagnosis; Strabismus/etiology; Strabismus/physiopathology; Torsion Abnormality/diagnosis; Torsion Abnormality/etiology*; Torsion Abnormality/physiopathology; Visual Acuity/physiology; Ocular Motility Disorders/diagnosis; Ocular Motility Disorders/etiology*; Ocular Motility Disorders/physiopathology; Magnetic Resonance Angiography; Trigeminal Nerve Diseases/diagnosis; Trigeminal Nerve Diseases/etiology*; Trigeminal Nerve Diseases/physiopathology; Brain Stem Infarctions/complications*; Brain Stem Infarctions/physiopathology
  3. Chong YM, Sam IC, Chong J, Kahar Bador M, Ponnampalavanar S, Syed Omar SF, et al.
    PLoS Negl Trop Dis, 2020 11;14(11):e0008744.
    PMID: 33253226 DOI: 10.1371/journal.pntd.0008744
    Malaysia had 10,219 confirmed cases of COVID-19 as of September 20, 2020. About 33% were associated with a Tablighi Jamaat religious mass gathering held in Kuala Lumpur between February 27 and March 3, 2020, which drove community transmission during Malaysia's second wave. We analysed genome sequences of SARS-CoV-2 from Malaysia to better understand the molecular epidemiology and spread. We obtained 58 SARS-CoV-2 whole genome sequences from patients in Kuala Lumpur and performed phylogenetic analyses on these and a further 57 Malaysian sequences available in the GISAID database. Nine different SARS-CoV-2 lineages (A, B, B.1, B.1.1, B.1.1.1, B.1.36, B.2, B.3 and B.6) were detected in Malaysia. The B.6 lineage was first reported a week after the Tablighi mass gathering and became predominant (65.2%) despite being relatively rare (1.4%) globally. Direct epidemiological links between lineage B.6 viruses and the mass gathering were identified. Increases in reported total cases, Tablighi-associated cases, and community-acquired B.6 lineage strains were temporally linked. Non-B.6 lineages were mainly travel-associated and showed limited onward transmission. There were also temporally correlated increases in B.6 sequences in other Southeast Asian countries, India and Australia, linked to participants returning from this event. Over 95% of global B.6 sequences originated from Asia Pacific. We also report a nsp3-C6310A substitution found in 47.3% of global B.6 sequences which was associated with reduced sensitivity using a commercial diagnostic real-time PCR assay. Lineage B.6 became the predominant cause of community transmission in Malaysia after likely introduction during a religious mass gathering. This event also contributed to spikes of lineage B.6 in other countries in the Asia-Pacific. Mass gatherings can be significant causes of local and global spread of COVID-19. Shared genomic surveillance can be used to identify SARS-CoV-2 transmission chains to aid prevention and control, and to monitor diagnostic molecular assays. Clinical Trial Registration: COVID-19 paper.
    MeSH terms: Humans; Malaysia/epidemiology; Mutation; Nasopharynx/virology; Oropharynx/virology; Phylogeny; RNA, Viral/isolation & purification; RNA, Viral/chemistry; Time Factors; Genetic Variation; Computational Biology; Multiplex Polymerase Chain Reaction
  4. Gilcharan Singh HK, Chee WSS, Hamdy O, Mechanick JI, Lee VKM, Barua A, et al.
    PLoS One, 2020;15(11):e0242487.
    PMID: 33253259 DOI: 10.1371/journal.pone.0242487
    OBJECTIVE: Eating self-efficacy behavior is an important predictor of successful lifestyle intervention. This secondary analysis evaluated the changes in eating self-efficacy behavior in patients with type 2 diabetes (T2D) and overweight/obesity following structured lifestyle intervention based on the Malaysian customized transcultural Diabetes Nutrition Algorithm (tDNA).

    METHODS: Patients with T2D and overweight/obesity (n = 230) were randomized either into the tDNA group which included a structured low-calorie meal plan using normal foods, incorporation of diabetes-specific meal replacements, and an exercise prescription or usual T2D care (UC) for 6 months. Patients in the tDNA group also received either counseling with motivational interviewing (tDNA-MI) or conventional counseling (tDNA-CC). The UC group received standard dietary and exercise advice using conventional counseling. Eating self-efficacy was assessed using a locally validated Weight Efficacy Lifestyle (WEL) questionnaire. All patients were followed up for additional 6 months' post-intervention.

    RESULTS: There was a significant change in WEL scores with intervention over one-year [Group X Time effect: F = 51.4, df = (3.4, 318.7), p<0.001]. Compared to baseline, WEL scores improved in both the tDNA groups with significantly higher improvement in the tDNA-MI group compared to the tDNA-CC and UC groups at 6 months (tDNA-MI: 25.4±2.1 vs. tDNA-CC: 12.9±2.8 vs. UC: -6.9±1.9, p<0.001). At 12 months' follow-up, both the tDNA groups maintained improvement in the WEL scores, with significantly higher scores in the tDNA-MI group than tDNA-CC group, and the UC group had decreased WEL scores (tDNA-MI: 28.9±3.1 vs. tDNA-CC: 11.6±3.6 vs. UC: -13.2±2.1, p<0.001). Patients in the tDNA-MI group with greater weight loss and hemoglobin A1C reduction also had a higher eating self-efficacy, with a similar trend observed in comparative groups.

    CONCLUSION: Eating self-efficacy improved in patients with T2D and overweight/obesity who maintained their weight loss and glycemic control following a structured lifestyle intervention based on the Malaysian customized tDNA and the improvement was further enhanced with motivational interviewing.

    CLINICAL TRIAL: This randomized clinical trial was registered under National Medical Research Registry, Ministry of Health Malaysia with registration number: NMRR-14-1042-19455 and also under ClinicalTrials.gov with registration number: NCT03881540.

    MeSH terms: Adult; Aged; Diabetes Mellitus, Type 2/complications*; Diabetes Mellitus, Type 2/therapy*; Diet Therapy; Feeding Behavior; Female; Humans; Male; Middle Aged; Nutritional Status; Weight Loss; Exercise; Self Efficacy; Overweight/complications*; Overweight/therapy*; Healthy Lifestyle*
  5. Mohi-Aldeen SM, Mohamad R, Deris S
    PLoS One, 2020;15(11):e0242812.
    PMID: 33253281 DOI: 10.1371/journal.pone.0242812
    Path testing is the basic approach of white box testing and the main approach to solve it by discovering the particular input data of the searching space to encompass the paths in the software under test. Due to the increasing software complexity, exhaustive testing is impossible and computationally not feasible. The ultimate challenge is to generate suitable test data that maximize the coverage; many approaches have been developed by researchers to accomplish path coverage. The paper suggested a hybrid method (NSA-GA) based on Negative Selection Algorithm (NSA) and Genetic Algorithm (GA) to generate an optimal test data avoiding replication to cover all possible paths. The proposed method modifies the generation of detectors in the generation phase of NSA using GA, as well as, develops a fitness function based on the paths' prioritization. Different benchmark programs with different data types have been used. The results show that the hybrid method improved the coverage percentage of the programs' paths, even for complicated paths and its ability to minimize the generated number of test data and enhance the efficiency even with the increased input range of different data types used. This method improves the effectiveness and efficiency of test data generation and maximizes search space area, increasing percentage of path coverage while preventing redundant data.
    MeSH terms: Algorithms; Automation*; Humans; Mutation/genetics; Quality Control*; Selection, Genetic/genetics; Software*
  6. Abd Rahman R, Min Tun K, Kamisan Atan I, Mohamed Said MS, Mustafar R, Zainuddin AA
    Rev Bras Ginecol Obstet, 2020 Nov;42(11):705-711.
    PMID: 33254264 DOI: 10.1055/s-0040-1715140
    OBJECTIVE:  To determine pregnancy outcomes in women with systemic lupus erythematosus (SLE) who were treated with hydroxychloroquine in a tertiary center.

    METHODS:  A retrospective study involving pregnant women with SLE who had antenatal follow-up and delivery in between 1 January 2007 and 1 January 2017. All participants were retrospectively enrolled and categorized into two groups based on hydroxychloroquine treatment during pregnancy.

    RESULTS:  There were 82 pregnancies included with 47 (57.3%) in the hydroxychloroquine group and 35 (42.7%) in the non-hydroxychloroquine group. Amongst hydroxychloroquine users, there were significantly more pregnancies with musculoskeletal involvement (p = 0.03), heavier mean neonatal birthweight (p = 0.02), and prolonged duration of pregnancy (p = 0.001). In non-hydroxychloroquine patients, there were significantly more recurrent miscarriages (p = 0.003), incidence of hypertension (p = 0.01) and gestational diabetes mellitus (p = 0.01) and concurrent medical illness (p = 0.005). Hydroxychloroquine use during pregnancy was protective against hypertension (p = 0.001), and the gestational age at delivery had significant effect on the neonatal birthweight (p = 0.001). However, duration of the disease had a significant negative effect on the neonatal birthweight (p = 0.016).

    CONCLUSION:  Hydroxychloroquine enhanced better neonatal outcomes and reduced adverse pregnancy outcomes and antenatal complications such as hypertension and diabetes.

    MeSH terms: Adult; Female; Humans; Hydroxychloroquine/administration & dosage; Hydroxychloroquine/therapeutic use*; Lupus Erythematosus, Systemic/drug therapy*; Malaysia; Pregnancy; Pregnancy Complications/drug therapy*; Pregnancy Outcome; Prenatal Care*; Retrospective Studies; Cohort Studies; Treatment Outcome; Tertiary Care Centers
  7. Sharir Aizat Kamaruddin, Muhammad Huzaifah Jaafar, Muhammad Ariff Zakariya, Muhammad Fayyadh Fadzilan, Aliff Iqbal Ahmad Nadzri, Khairul Naim Abd.Aziz, et al.
    MyJurnal
    This research is conducted to investigate the effects of cubed and crushed ice on the crude fat, ash, and
    moisture content of Channa striata and Clarias batrachus. The samples were chilled to four and seven days in the Polyvinyl chloride plastic (PVC) boxes filled with cubed ice and crushed ice. Before the determination of crude, ash, and moisture content, the samples were frozen for 1 week. Statistical
    analyses were carried out to indicate the significant difference in the effects of treatment days and
    physical characteristics of ice towards the crude fat, ash, and moisture content. The result concludes that crushed ice is more superior to cubed ice for all experiments. The outcomes of this research benefit many parties specially to cubed ice suppliers to support aquaculture industries and the socio-economic sectors in Malaysia.
    MeSH terms: Animals; Fishes; Freezing; Ice; Malaysia; Physical Examination; Plastics; Polyvinyl Chloride; Socioeconomic Factors; Aquaculture
  8. Norsyafiqah Mohamad, Masnita Misiran, Zahayu Md Yusof
    MyJurnal
    Businesses adopt queuing mechanism as it can improve efficiency and provide economic use of
    resources. Some business segment that normally adapted queuing theory include assessing staff
    scheduling, productivity, performance, and customers waiting time. This article will adopt queuing
    theory to current service provided by Department of Labour, Kuala Terengganu. As the department is
    committed to provide quality services to its customer, the level of satisfaction and current queueing
    time need to be investigated. To achieve this, four elements in queueing theory – arrival rate, the
    queuing discipline, the service and also the cost structure are utilized. Arrival rate is measured as way
    in which customer arrives at this department and entered for receiving a service. Single server queuing
    model is known as infinite queue length model (exponential service) was used in this study. This model
    is based on certain assumptions about queuing, as the arrivals are described by Poisson probability
    distribution and arrive from infinite population. This study has demonstrated that, majority of the
    customers are dissatisfied with services offered and the major cause of dissatisfaction is the long waiting
    time. Sunday shows the busiest day at Department of Labour, Kuala Terengganu when there are too
    many customers and duty officer faced a hectic day on Sunday, followed by Thursday and Wednesday.
    Department of Labour, Kuala Terengganu needed to do the other internal procedures for reducing
    waiting times and thus ensuring an effective services system. This study recommended of adding a new
    checkout counter and hiring another employee to help duty officer improve the operation at Department
    of Labour, Kuala Terengganu.
    MeSH terms: Computers; Health Resources; Humans; Personal Satisfaction; Personnel Selection; Probability; Systems Theory; Waiting Lists
  9. Mohammad Harris M. Yahya, Normala Hassim, Mohd Rozi Ahmad
    MyJurnal
    The present work deals with the production of paper materials from onion peels (Allium Cepa) fibers
    as an alternative potential non-wood fiber. The onion peels were obtained from a local small and
    medium food industry. The onion peels were cooked at 120, 150 and 180 minutes. The peels were
    grinded and poured in a set of mould and deckle for the formation of a thin sheet of paper. The
    physical, mechanical, morphological characteristics and water rise capillary values (KLEMM
    Method) were evaluated to determine its suitability for a paper material. The results show that the
    increase in cooking time from 120 to 180 minutes resulted in an increase in the tensile index from
    32.28N*m/g to 42.13N*m/g and tear index from 9.80mN*m2
    /g to 15.62mN*m2
    /g. The bonding
    strength increased due to higher number of fibers, finer fiber size, and increase in the fiber contact
    area and fiber distribution. The high porosity area affects the performance of water rise capillary
    values of the paper sheets. The onion peels fiber gave impressive handsheets characteristics when
    compared with other sources of non-wood fibers.
    MeSH terms: Carbohydrates; Cooking; Dietary Fiber; Food Hypersensitivity; Nitrogen Radioisotopes; Water; Porosity; Onions
  10. Muhammad Helmi Nadri, Kian, Kai Cheng, Pei, Ying Ong, Hong, Yeng L., Nor Zalina Othman, Nur Fashya Musa, et al.
    MyJurnal
    Ipomea aquatica, locally known as water spinach, is one of the most common vegetable consumed by
    Malaysian. Based on previous studies, crude extract and phenolic compounds of I. aquatica exhibited
    several biological activities including antioxidant, anti-microbial and anti-proliferative. The presence
    of phenolic compounds in I. aquatica may contributed to their ability to inhibit enzymes, chelate
    metals and scavenge free radicals. Currently, no study reported on anti-inflammatory activity of I.
    aquatica with respect to lipoxygenase, hyaluronidase and xanthine oxidase enzymes. The present
    study aims to enhance current knowledge on biological properties of I. aquatica crude extract
    particularly on anti-inflammatory activity. Three enzymes that involve in inflammatory pathway were
    selected in this study including lipoxygenase, hyaluronidase and xanthine oxidase. I. aquatica was
    extracted in methanol and tested for lipoxygenase, hyaluronidase and xanthine oxidase at different
    concentrations using direct enzyme inhibition assay. Lipoxygenase, hyaluronidase and xanthine
    oxidase inhibitory activities of the methanol crude extract increased with increasing
    concentration. Highest inhibition activity against lipoxygenase, hyaluronidase and xanthine oxidase
    were observed at a concentration of 1000 µg/ml with inhibition of 87.18%, 95.36% and 78.38%,
    respectively. Our finding in this study indicates potential anti-inflammatory activity of I. aquatica
    crude extract through inhibition of lipoxygenase, hyaluronidase and xanthine oxidase.
    MeSH terms: Methanol; Anti-Inflammatory Agents; Antioxidants; Free Radicals; Hyaluronoglucosaminidase; Lipoxygenase; Metals; Oxidoreductases; Phenols; Vegetables; Water; Xanthine Oxidase; Spinacia oleracea; Xanthine; Ipomoea
  11. Siti Noriah Mohd Shotor, Nur Anis Atirah Zulkiflee
    MyJurnal
    This paper deals with a review of the inhibition activity of a Schiff bases on the deterioration of mild steel in hydrochloric acid media. Two Schiff base ligands namely N,N’- Bis(salicylidene) ethylenediamine (Sadimine) and N,N’-Bis(bromosalicylidene)- ethylenediamine (Brosadimine) were synthesized from the condensation reactions of salicylaldehyde or 5-bromosalicylaldehyde with ethylenediamine respectively and evaluated as corrosion inhibitor for mild steel in 1 M HCl solution using weight loss method. The use of inhibitors is one of the most practical methods for protection of mild steel against corrosion in acidic media. Schiff bases are widely being employed in such applications. This paper highlights the influence of structure–inhibition activity relationship of Schiff base compounds
    on their performance as corrosion inhibitors of mild steel in acid media. Sadimine and
    Brosadimine show appreciable corrosion inhibition efficiency against the corrosion of mild
    steel in 1 M HCl solution at room temperature. It has been found that Brosadimine shows
    greater corrosion inhibition efficiency than Sadimine due to extra halogen group presence in
    the structure. As the concentration of studied inhibitors increases, the corrosion inhibition
    efficiency of the prepared compounds also increases. This study demonstrated that corrosion
    inhibitors for metals and alloys can preserve the quality and life of metals from corrosion.
    MeSH terms: Aldehydes; Alloys; Corrosion; Ethylenediamines; Halogens; Hydrochloric Acid; Ligands; Schiff Bases; Steel; Temperature; Weight Loss
  12. Kasim NF, Veldhuijzen van Zanten J, Aldred S
    Exp Gerontol, 2020 07 01;135:110925.
    PMID: 32184194 DOI: 10.1016/j.exger.2020.110925
    Frailty affects the quality of life of older age adults by limiting mobility, reducing physiological reserve and reducing independence. The frailty phenotype is typically characterised by exhaustion, loss or lack of physical activity, weight loss and weakness, although more recently there have been proposals to extend the frailty criteria to include physiological characteristics such as inflammation, oxidative stress and vascular function. Exercise has the potential to prevent, delay or even reverse frailty, but not all exercise is perceived as suitable for an older age population. The purpose of this study was to test Tai Chi and Zumba Gold® as exercise interventions in older age adults (65 to 75 years old) to improve characteristics related to the frailty phenotype. Muscle strength and flexibility (functional fitness as a measure of weakness), cardiorespiratory fitness, blood pressure, vascular function (FMD), markers of oxidative stress (total antioxidant capacity, malondialdehyde, 8-isoprostane, protein carbonyl), inflammation (CRP) and aspects of wellbeing related to exhaustion were assessed at baseline (pre-), 6 weeks (mid-) and 12 weeks (post-intervention). Both Tai Chi and Zumba Gold® improved systolic blood pressure, vascular function, and functional fitness following the 12 week intervention to a similar extent. Furthermore Antioxidant capacity was significantly increased (303 ± 15.56 vs. 336 ± 18.82 μm; p = 0.0028) and lipid oxidation significantly reduced (36.41 ± 6.4 vs 13.49 ± 2.5 pg/ml; p = 0.0042) after 12 weeks of Tai Chi compared to baseline. Anxiety, physical and mental fatigue decreased in both groups, with a greater decrease in mental fatigue in the Tai Chi group. Taken together, these changes suggest that Tai Chi has the potential to reduce outcomes related to the extended frailty phenotype in older age adults.
    MeSH terms: Aged; Humans; Quality of Life; Exercise; Tai Ji*; Muscle Strength
  13. Zainal SMIS, Hejazi F, Aziz FNAA, Jaafar MS
    Materials (Basel), 2020 Nov 10;13(22).
    PMID: 33182531 DOI: 10.3390/ma13225055
    The use of fibers in cementitious composites yields numerous benefits due to their fiber-bridging capabilities in resisting cracks. Therefore, this study aimed to improve the shear-resisting capabilities of conventional concrete through the hybridization of multiple synthetic fibers, specifically on reinforced concrete structures in seismic-prone regions. For this study, 16 hybrid fiber-reinforced concretes (HyFRC) were developed from the different combinations of Ferro macro-synthetic fibers with the Ultra-Net, Super-Net, Econo-Net, and Nylo-Mono microfibers. These hybrids were tested under direct shear, resulting in improved shear strength of controlled specimens by Ferro-Ultra (32%), Ferro-Super (24%), Ferro-Econo (44%), and Ferro-Nylo (24%). Shear energy was further assessed to comprehend the effectiveness of the fiber interactions according to the mechanical properties, dosage, bonding power, manufactured material, and form of fibers. Conclusively, all fiber combinations used in this study produced positive synergistic effects under direct shear at large crack deformations.
    MeSH terms: Dietary Fiber; Hybridization, Genetic; Manufactured Materials; Nucleic Acid Hybridization; Shear Strength
  14. Nda-Umar UI, Ramli I, Muhamad EN, Azri N, Taufiq-Yap YH
    Molecules, 2020 Nov 10;25(22).
    PMID: 33182532 DOI: 10.3390/molecules25225221
    In this study, an optimized mesoporous sulfonated carbon (OMSC) catalyst derived from palm kernel shell biomass was developed using template carbonization and subsequent sulfonation under different temperatures and time conditions. The OMSC catalyst was characterized using acid-base titration, elemental analysis, XRD, Raman, FTIR, XPS, TPD-NH3, TGA-DTA, SEM, and N2 adsorption-desorption analysis to reveal its properties. Results proved that the OMSC catalyst is mesoporous and amorphous in structure with improved textural, acidic, and thermal properties. Both FTIR and XPS confirmed the presence of -SO3H, -OH, and -COOH functional groups on the surface of the catalyst. The OMSC catalyst was found to be efficient in catalyzing glycerol conversion to acetin via an acetylation reaction with acetic acid within a short period of 3 h. Response surface methodology (RSM), based on a two-level, three-factor, face-centered central composite design, was used to optimize the reaction conditions. The results showed that the optimized temperature, glycerol-to-acetic acid mole ratio, and catalyst load were 126 °C, 1:10.4, and 0.45 g, respectively. Under these optimum conditions, 97% glycerol conversion (GC) and selectivities of 4.9, 27.8, and 66.5% monoacetin (MA), diacetin (DA), and triacetin (TA), respectively, were achieved and found to be close to the predicted values. Statistical analysis showed that the regression model, as well as the model terms, were significant with the predicted R2 in reasonable agreement with the adjusted R2 (<0.2). The OMSC catalyst maintained excellent performance in GC for the five reaction cycles. The selectivity to TA, the most valuable product, was not stable until the fourth cycle, attributable to the leaching of the acid sites.
    MeSH terms: Acetylation; Acids; Adsorption; Carbon; Catalysis; Glycerides; Glycerol; Temperature; Triacetin; Spectroscopy, Fourier Transform Infrared; Biomass; Acetic Acid
  15. Zango ZU, Jumbri K, Sambudi NS, Ramli A, Abu Bakar NHH, Saad B, et al.
    Polymers (Basel), 2020 Nov 10;12(11).
    PMID: 33182825 DOI: 10.3390/polym12112648
    Water-borne emerging pollutants are among the greatest concern of our modern society. Many of these pollutants are categorized as endocrine disruptors due to their environmental toxicities. They are harmful to humans, aquatic animals, and plants, to the larger extent, destroying the ecosystem. Thus, effective environmental remediations of these pollutants became necessary. Among the various remediation techniques, adsorption and photocatalytic degradation have been single out as the most promising. This review is devoted to the compilations and analysis of the role of metal-organic frameworks (MOFs) and their composites as potential materials for such applications. Emerging organic pollutants, like dyes, herbicides, pesticides, pharmaceutical products, phenols, polycyclic aromatic hydrocarbons, and perfluorinated alkyl substances, have been extensively studied. Important parameters that affect these processes, such as surface area, bandgap, percentage removal, equilibrium time, adsorption capacity, and recyclability, are documented. Finally, we paint the current scenario and challenges that need to be addressed for MOFs and their composites to be exploited for commercial applications.
  16. Hoque MA, Pradhan B, Ahmed N, Sohel MSI
    Sci Total Environ, 2020 Nov 17.
    PMID: 33248778 DOI: 10.1016/j.scitotenv.2020.143600
    Droughts are recurring events in Australia and cause a severe effect on agricultural and water resources. However, the studies about agricultural drought risk mapping are very limited in Australia. Therefore, a comprehensive agricultural drought risk assessment approach that incorporates all the risk components with their influencing criteria is essential to generate detailed drought risk information for operational drought management. A comprehensive agricultural drought risk assessment approach was prepared in this work incorporating all components of risk (hazard, vulnerability, exposure, and mitigation capacity) with their relevant criteria using geospatial techniques. The prepared approach is then applied to identify the spatial pattern of agricultural drought risk for Northern New South Wales region of Australia. A total of 16 relevant criteria under each risk component were considered, and fuzzy logic aided geospatial techniques were used to prepare vulnerability, exposure, hazard, and mitigation capacity indices. These indices were then incorporated to quantify agricultural drought risk comprehensively in the study area. The outputs depicted that about 19.2% and 41.7% areas are under very-high and moderate to high risk to agricultural droughts, respectively. The efficiency of the results is successfully evaluated using a drought inventory map. The generated spatial drought risk information produced by this study can assist relevant authorities in formulating proactive agricultural drought mitigation strategies.
    MeSH terms: Agriculture; Australia; New South Wales; Fuzzy Logic; Risk Assessment; Droughts; Water Resources
  17. Ong AL, Teh CK, Mayes S, Massawe F, Appleton DR, Kulaveerasingam H
    Plants (Basel), 2020 Nov 03;9(11).
    PMID: 33152992 DOI: 10.3390/plants9111476
    Oil palm (Elaeis guineensis Jacq.) is the most traded crop among the economically important palm species. Here, we report an extended version genome of E. guineensis that is 1.2 Gb in length, an improvement of the physical genome coverage to 79% from the previous 43%. The improvement was made by assigning an additional 1968 originally unplaced scaffolds that were available publicly into the physical genome. By integrating three ultra-dense linkage maps and using them to place genomic scaffolds, the 16 pseudomolecules were extended. As we show, the improved genome has enhanced the mapping resolution for genome-wide association studies (GWAS) and permitted further identification of candidate genes/protein-coding regions (CDSs) and any non-coding RNA that may be associated with them for further studies. We then employed the new physical map in a comparative genomics study against two other agriculturally and economically important palm species-date palm (Phoenix dactylifera L.) and coconut palm (Cocos nucifera L.)-confirming the high level of conserved synteny among these palm species. We also used the improved oil palm genome assembly version as a palm genome reference to extend the date palm physical map. The improved genome of oil palm will enable molecular breeding approaches to expedite crop improvement, especially in the largest subfamily of Arecoideae, which consists of 107 species belonging to Arecaceae.
    MeSH terms: Chromosome Mapping; Cocos; Lipid Metabolism, Inborn Errors; Muscular Diseases; Ichthyosiform Erythroderma, Congenital; RNA, Untranslated; Genomics; Synteny; DNA Shuffling; Genome-Wide Association Study; Phoeniceae
  18. Shah SA, Mahmood MI, Ahmad N
    Asian Pac J Cancer Prev, 2020 Nov 01;21(11):3137-3144.
    PMID: 33247668 DOI: 10.31557/APJCP.2020.21.11.3137
    BACKGROUND: The recent data shows reduced uptake on cancer screening where the Perception towards cancer screening by the public is one of the favorable factor might influence the screening uptake. Therefore, this study aims to determine the predictors of poor cancer screening perceptions among the population in Johor, Malaysia.

    METHODS: This was a cross sectional study of 1,312 respondents selected using a multistage design. Questionnaires relating to the demographic characteristics, socioeconomic profiles, social and physical environment, knowledge and perception of cancer screening were gathered. Multiple logistic regression models were used to examine the variables and their association with poor perceptions of cancer screening.

    RESULTS: Overall, 871(66.4%) respondents had poor perceptions of cancer screenings; 68.4% among males and 64.4% among females. In the multivariable analysis in the category of income, the bottom 40% and lower middle 40%, had not subscribed to health insurance, had poor social support, absence of any family history of cancer or comorbid illnesses, no previous attendance for cancer screening and poor knowledge of cancer, all of which were associated with their poor cancer screening perceptions.

    CONCLUSION: One way of developing cancer screening services to detect cancer in its early stage could include efforts to reach people with less awareness about cancer screening tests, lower socioeconomic status, and inadequate social support. Particular consideration should be taken to locate those who never had health insurance or attended cancer screening tests to provide the appropriate resources.

    MeSH terms: Adult; Cross-Sectional Studies; Female; Follow-Up Studies; Humans; Health Knowledge, Attitudes, Practice*; Male; Neoplasms/diagnosis*; Neoplasms/psychology; Patient Acceptance of Health Care*; Perception; Risk Factors; Social Class*; Socioeconomic Factors*; Early Detection of Cancer/psychology*; Early Detection of Cancer/statistics & numerical data*
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