MyMedR

Fulltext A case report "Chest discomfort in a patient with dengue - is it an acute myocardial infarction?"

Lu HT

Malays Fam Physician, 2019;14(2):48.

Fulltext A woman with fever and cough: coronavirus disease 2019

Lu YQ

Intern Emerg Med, 2020 Nov;15(8):1553-1554.

PMID: 32232784 DOI: 10.1007/s11739-020-02321-3

Renewable energy, carbon emissions, and economic growth in 24 Asian countries: evidence from panel cointegration analysis

Lu WC

Environ Sci Pollut Res Int, 2017 Nov;24(33):26006-26015.

PMID: 28942473 DOI: 10.1007/s11356-017-0259-9

This article aims to investigate the relationship among renewable energy consumption, carbon dioxide (CO2) emissions, and GDP using panel data for 24 Asian countries between 1990 and 2012. Panel cross-sectional dependence tests and unit root test, which considers cross-sectional dependence across countries, are used to ensure that the empirical results are correct. Using the panel cointegration model, the vector error correction model, and the Granger causality test, this paper finds that a long-run equilibrium exists among renewable energy consumption, carbon emission, and GDP. CO2 emissions have a positive effect on renewable energy consumption in the Philippines, Pakistan, China, Iraq, Yemen, and Saudi Arabia. A 1% increase in GDP will increase renewable energy by 0.64%. Renewable energy is significantly determined by GDP in India, Sri Lanka, the Philippines, Thailand, Turkey, Malaysia, Jordan, United Arab Emirates, Saudi Arabia, and Mongolia. A unidirectional causality runs from GDP to CO2 emissions, and two bidirectional causal relationships were found between CO2 emissions and renewable energy consumption and between renewable energy consumption and GDP. The findings can assist governments in curbing pollution from air pollutants, execute energy conservation policy, and reduce unnecessary wastage of energy.

A comparative study of storage stability in virgin coconut oil and extra virgin olive oil upon thermal treatment

Henna Lu, F.S., Tan, P.P

International Food Research Journal, 2009;16(3):343-354.

MyJurnal

This aim of this research is to investigate thermal stability of virgin coconut oil, (VCO) which was heated at 190°C upon 40 days storage as compared to extra virgin olive oil (EVOO). The changes in fatty acids composition through (GC), Fourier Transform Infrared (FTIR) spectra, iodine value (IV) and total phenolic content were determined throughout the period of study. Results from GC showed that there was significant changes (P

Fulltext Toward the Impact of EFL Teachers' Self-Efficacy and Collective Efficacy on Students' Engagement

Lu Q, Mustafa Z

Front Psychol, 2021;12:744586.

PMID: 34589035 DOI: 10.3389/fpsyg.2021.744586

Given the centrality of students' engagement in their academic success, considerable attention has been paid to this construct and its potential predictors. Notwithstanding, a limited number of studies have focused on the role of teacher self- and collective efficacy as antecedents of student engagement. Further, no review study has been carried out to illustrate the impact of EFL teacher' efficacy on learning engagement. Hence, the current study intends to review the previous studies conducted on this topic to probe into the beneficial effects of EFL teachers' sense of efficacy on students' academic engagement. The predictability power of EFL teachers' self- and collective efficacy was confirmed through empirical and theoretical evidence. The conclusion and pedagogical implications of the finding are also discussed.

Abcoronalis protrusus, a new paraboloponine genus and species (Hemiptera: Cicadellidae: Deltocephalinae: Drabescini) from Borneo

Lu L, Zhang Y

Zootaxa, 2018 Aug 15;4459(2):387-394.

PMID: 30314116 DOI: 10.11646/zootaxa.4459.2.11

The Oriental leafhopper genus Abcoronalis gen. nov. is described and illustrated, and placed in the subtribe Paraboloponina (Cicadellidae: Deltocephalinae: Drabescini). The genus differs from other Paraboloponina in having the coronal suture vestigial and the dorsal margin of the male pygofer with a pair of long, curved processes. The type species, Abcoronalis protrusus sp. nov. is from Borneo (Malaysia). A checklist and key of the subtribe Paraboloponina from Northern Borneo is provided.

Fulltext Editorial: Nutraceuticals for the recovery of COVID-19 patients

Karupaiah T, Lu KC

Front Nutr, 2022;9:1054632.

PMID: 36451742 DOI: 10.3389/fnut.2022.1054632

Quantifying an influence of green credit on digital technology innovation: financial perspective of a China's case study

Ke W, Lu S

Environ Sci Pollut Res Int, 2023 Apr;30(17):49744-49759.

PMID: 36781669 DOI: 10.1007/s11356-023-25691-5

This paper examines the impact of green credit (GC) on digital technology innovation based on Chinese enterprises using panel data from 1990 to 2016. The study collected panel data from the 40 Chinese firms listed on the Beijing and Wuhan stock markets. Manufacturing companies were selected because they mainly contribute to green credit from pre- and post-policy periods. First, in the "two high and one surplus" sectors, the application of China's Green Credit 2012 could significantly increase total factor digital technology innovation by 1.21%. Results show a considerable drop in the variable values of digital technology innovation, 61.3%; green credit policy, 10.45%; leverage, 21.0%; and green innovation, 85.4%. The results of the absolute value of standard error after matching is much lower than 20.0%, demonstrating that the variable features of the two sets of samples are similar. In conclusion, GC's impact on the FDI of capital was asymmetrical, reflecting various impacts on businesses with various types of property rights and sizes.

Checklist of vascular plants of Klang Gates Quartz Ridge, Malaysia, a 14-km long quartz dyke

Kiew R, Chung-Lu L

PhytoKeys, 2020;166:57-77.

PMID: 33199961 DOI: 10.3897/phytokeys.166.55778

The Klang Gates Quartz Ridge (KGQR) is proposed for protection as National Heritage and as a UNESCO World Heritage Site because of its spectacular size, exceptional beauty and significant biodiversity. The checklist of vascular plants documents 314 species that comprise a unique combination that grows on lowland quartz and that is distinct from the surrounding lowland equatorial rain forest by the absence of orchids, palms, gingers and tree canopy families. The Rubiaceae, Gramineae, Moraceae, Apocynaceae, Melastomataceae and Polypodiaceae are the most speciose families. The summit vegetation at 200-400 m elevation is dominated by Baeckea frutescens (Myrtaceae) and Rhodoleia championii (Hamamelidaceae) and shows similarities to the plant community on rocky mountain peaks above 1500 m. About 11% of its species are endemic in Peninsular Malaysia and four are endemic to KGQR: Aleisanthia rupestris (Rubiaceae), Codonoboea primulina (Gesneriaceae), Spermacoce pilulifera (Rubiaceae), and Ilex praetermissa (Aquifoliaceae). All four are provisionally assessed as Critically Endangered. Two, Eulalia milsumi (Gramineae) and Sonerila prostrata (Melastomataceae), are endemic to KGQR and a few neighbouring smaller quartz dykes. They are assessed as Endangered. The KGQR is a fragile habitat and conservation management is urgently required to halt the spread of the aggressive alien grass, Pennisetum polystachion and to prevent further habitat degradation from visitors. Based on KGQR being a threatened habitat, its biodiverse flora, and endangered species, it qualifies as an Important Plant Area.

Fulltext Revisiting Mitochondria Scored Cancer Progression and Metastasis

Gundamaraju R, Lu W, Manikam R

Cancers (Basel), 2021 Jan 23;13(3).

PMID: 33498743 DOI: 10.3390/cancers13030432

The Warburg effect has immensely succored the study of cancer biology, especially in highlighting the role of mitochondria in cancer stemness and their benefaction to the malignancy of oxidative and glycolytic cancer cells. Mitochondrial genetics have represented a focal point in cancer therapeutics due to the involvement of mitochondria in programmed cell death. The mitochondrion has been well established as a switch in cell death decisions. The mitochondrion's instrumental role in central bioenergetics, calcium homeostasis, and translational regulation has earned it its fame in metastatic dissemination in cancer cells. Here, we revisit and review mechanisms through which mitochondria influence oncogenesis and metastasis by underscoring the oncogenic mitochondrion that is capable of transferring malignant capacities to recipient cells.

Fulltext CHCHD2: The Power House's Potential Prognostic Factor for Cancer?

Gundamaraju R, Lu W, Manikam R

Front Cell Dev Biol, 2020;8:620816.

PMID: 33537311 DOI: 10.3389/fcell.2020.620816

Tuning into the travel health risks of music tourism

Lu TS, Flaherty GT

J Travel Med, 2018 01 01;25(1).

PMID: 30346571 DOI: 10.1093/jtm/tay106

Fulltext Ethnic differences in the occurrence of acute coronary syndrome: results of the Malaysian National Cardiovascular Disease (NCVD) Database Registry (March 2006 - February 2010)

Lu HT, Nordin RB

BMC Cardiovasc Disord, 2013 Nov 06;13:97.

PMID: 24195639 DOI: 10.1186/1471-2261-13-97

BACKGROUND: The National Cardiovascular Disease (NCVD) Database Registry represents one of the first prospective, multi-center registries to treat and prevent coronary artery disease (CAD) in Malaysia. Since ethnicity is an important consideration in the occurrence of acute coronary syndrome (ACS) globally, therefore, we aimed to identify the role of ethnicity in the occurrence of ACS among high-risk groups in the Malaysian population.

METHODS: The NCVD involves more than 15 Ministry of Health (MOH) hospitals nationwide, universities and the National Heart Institute and enrolls patients presenting with ACS [ST-elevation myocardial infarction (STEMI), non-ST elevation myocardial infarction (NSTEMI) and unstable angina (UA)]. We analyzed ethnic differences across socio-demographic characteristics, hospital medications and invasive therapeutic procedures, treatment of STEMI and in-hospital clinical outcomes.

RESULTS: We enrolled 13,591 patients. The distribution of the NCVD population was as follows: 49.0% Malays, 22.5% Chinese, 23.1% Indians and 5.3% Others (representing other indigenous groups and non-Malaysian nationals). The mean age (SD) of ACS patients at presentation was 59.1 (12.0) years. More than 70% were males. A higher proportion of patients within each ethnic group had more than two coronary risk factors. Malays had higher body mass index (BMI). Chinese had highest rate of hypertension and hyperlipidemia. Indians had higher rate of diabetes mellitus (DM) and family history of premature CAD. Overall, more patients had STEMI than NSTEMI or UA among all ethnic groups. The use of aspirin was more than 94% among all ethnic groups. Utilization rates for elective and emergency percutaneous coronary intervention (PCI) and coronary artery bypass graft (CABG) were low among all ethnic groups. In STEMI, fibrinolysis (streptokinase) appeared to be the dominant treatment options (>70%) for all ethnic groups. In-hospital mortality rates for STEMI across ethnicity ranges from 8.1% to 10.1% (p = 0.35). Among NSTEMI/UA patients, the rate of in-hospital mortality ranges from 3.7% to 6.5% and Malays recorded the highest in-hospital mortality rate compared to other ethnic groups (p = 0.000). In binary multiple logistic regression analysis, differences across ethnicity in the age and sex-adjusted ORs for in-hospital mortality among STEMI patients was not significant; for NSTEMI/UA patients, Chinese [OR 0.71 (95% CI 0.55, 0.91)] and Indians [OR 0.57 (95% CI 0.43, 0.76)] showed significantly lower risk of in-hospital mortality compared to Malays (reference group).

CONCLUSIONS: Risk factor profiles and ACS stratum were significantly different across ethnicity. Despite disparities in risk factors, clinical presentation, medical treatment and invasive management, ethnic differences in the risk of in-hospital mortality was not significant among STEMI patients. However, Chinese and Indians showed significantly lower risk of in-hospital mortality compared to Malays among NSTEMI and UA patients.

Fulltext Are bovine and porcine adenoviruses distinctive from other adenovirus strains?

Florence C. H. Lee, Lu Ping Tan

Malaysian Journal of Medicine and Health Sciences, 2019;15(106):86-86.

MyJurnal

Introduction: Adenoviruses are important in public health. They are used as indicators for microbial pollution source tracking (MST), and as vaccine vectors. Knowledge of host specificity and pre-existing immunity are critical for the two applications. Bovine and porcine adenoviruses are expected to be widespread in the environment through agriculture. Here we examined if bovine and porcine adenovirus strains are truly distinctive from other adenovirus strains. Methods: 46 adenovirus strains with complete genome were downloaded from the RefSeq database of Gen-Bank. 450 bp of nucleotides each at positions 1- 450, 18001-18450, and 27001 – 27450 of the respective strains were subjected to the Disparity Index Test using Mega 7 software. Analysis focused on four adenovirus strains: Bo-vine B, Bovine D, Porcine C and Porcine 3. The total number of strains that were significantly different (P

Effect of flaxseed oil towards physicochemical and sensory characteristic of reduced fat ice creams and its stability in ice creams upon storage

Lim, C.W., Norziah, M.H., Lu, H.F.S.

International Food Research Journal, 2010;17(2):393-403.

MyJurnal

This study investigates the effect of flaxseed oil towards physicochemical and sensory properties of reduced fat ice creams and its stability in ice-creams upon storage. Three formulations, (F1, F2, F3) were developed by substituting milk fat with flaxseed oil at levels of 2.5%, 5.0% and 7.5%, (w/w) respectively. Samples were subjected to sensory evaluation and analyses such as meltdown, titratable acidity, pH, total solids, protein and fatty acids composition. Incorporation of flaxseed oil into ice-cream showed no effects on physicochemical properties of the ice-creams. However, it increased the colour of ice-cream towards yellowness, decreased the sweetness, smoothness and creaminess. Flaxseed oil incorporation also slightly (P < 0.05) decreased the acceptance level of aroma, flavour, texture and overall acceptability of formulated icecreams. The most acceptable level of flaxseed oil substitution is at 2.5 %. Gas chromatography analysis showed that fatty acids slightly decreased upon storage.

Quasiconformal harmonic mappings related to janowski starlike functions

Yasemin Kahramaner, Ya?ar Polato?lu

Sains Malaysiana, 2014;43:1961-1964.

Let be a univalent sense-preserving harmonic mapping of the open unit disc D = {z⎜ ⎜z⎜ < 1}. If f satisfies the condition ⎜ω(z)⎜= < k, 0 < k < 1, then is called k-quasiconformal harmonic mapping in D. The main purpose of this paper was to give some properties of the class of k-quasiconformal mappings related to Janowski starlike functions.

Application of multivariate membership function discrimination method for lithology identification

Jun Zhao, Feifei Wang, Yifan Lu

Sains Malaysiana, 2017;46:2223-2229.

Formation lithology identification is an indispensable link in oil and gas exploration. Precision of the traditional recognition method is difficult to guarantee when trying to identify lithology of particular formation with strong heterogeneity and complex structure. In order to remove this defect, multivariate membership function discrimination method is proposed, which regard to lithology identification as a linear model in the fuzzy domain and obtain aimed result with the multivariate membership function established. It is indicated by the test on lower carboniferous Bachu group bioclastic limestone section and Donghe sandstone section reservoir on T Field H area that satisfactory accuracy can be achieved in both clastic rock and carbonate formation and obvious advantages are unfold when dealing with complex formations, which shows a good application prospect and provides a new thought to solve complex problems on oilfield exploration and development with fuzzy theory.

Codonoboea (Gesneriaceae) in Terengganu, Peninsular Malaysia, including three new species

Kiew R, Lim CL

PhytoKeys, 2019;131:1-26.

PMID: 31537960 DOI: 10.3897/phytokeys.131.35944

Of the 92 Codonoboea species that occur in Peninsular Malaysia, 20 are recorded from the state of Terengganu, of which 9 are endemic to Terengganu including three new species, C. norakhirrudiniana Kiew, C. rheophytica Kiew and C. sallehuddiniana C.L.Lim, that are here described and illustrated. A key and checklist to all the Terengganu species are provided. The majority of species grow in lowland rain forest, amongst which C. densifolia and C. rheophytica are rheophytic. Only four grow in montane forest. The flora of Terengganu is still incompletely known, especially in the northern part of the state and in mountainous areas and so, with botanical exploration, more new species can be expected in this speciose genus.

Fulltext Note on the genus Serendib Deeleman-Reinhold, 2001, with the description of a new species (Araneae, Corinnidae, Castianeirinae)

Zhang L, Zhang F

Biodivers Data J, 2023;11:e99980.

PMID: 38327341 DOI: 10.3897/BDJ.11.e99980

BACKGROUND: Prior to this study, the genus Serendib Deeleman-Reinhold, 2001 has been discovered in Indonesia, Thailand and Laos and comprises three species: S.muadai Jäger, Nophaseud & Praxaysombath, 2012, S.suthepica Deeleman-Reinhold, 2001 and S.volans Deeleman-Reinhold, 2001.

NEW INFORMATION: The genus Serendib Deeleman-Reinhold, 2001 is reviewed. A new species, S.hispida sp. n. (male and female), representing the first record of genus Serendib from Malaysia, is described. Descriptions and illustrations of the females of S.volans (Malaysia) and S.suthepica (China) are also provided. The latter represents the first record of the genus in China.

Overproduction of lipoxygenase from Pseudomonas aeruginosa in Escherichia coli by auto-induction expression and its application in triphenylmethane dyes degradation

Lu J, Zhang C, Leong HY, Show PL, Lu F, Lu Z

J Biosci Bioeng, 2020 Mar;129(3):327-332.

PMID: 31585857 DOI: 10.1016/j.jbiosc.2019.09.006

In this study, the bacterial lipoxygenase (LOX) gene from Pseudomonas aeruginosa ATCC27853 (pse-LOX) was cloned, sequenced and heterologous expressed in Escherichia coli by auto-induction expression strategy. Production of the recombinant pse-LOX (pse-rLOX) gene up to 23,850 U/mL (264 mg pure protein/L bacterial culture fluid) was observed in the end of this process. To the best of our knowledge, this is the first attempt to manipulate LOX heterologous expression process using auto-induction expression approach, and it is the highest production of recombinant LOX compared with other reports. Subsequently, the resulted pse-rLOX was proved to efficiently degrade triphenylmethane dyes such as malachite green, brilliant green and aniline blue. Generally, an overproduction of the LOX from P. aeruginosa was observed in E. coli, and this recombinant gene is a potential candidate as biocatalyst for triphenylmethane dyes decolorization.

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