Displaying publications 3241 - 3260 of 7301 in total

Abstract:
Sort:
  1. Mohammad Anwar Mohamed Iqbal, Muhammad Zulhelmi Nazri, Mohammad Norazmi Ahmad, Erna Normaya Abdullah, Umie Fatihah Mohamad Haziz, Mohd Rizal Razali, et al.
    Science Letters, 2020;14(2):71-84.
    MyJurnal
    Silver (I) dicyanonitrosomethanide, Ag[ONC(CN)2] represent a 3D interwoven coordination polymer organization in which all the donor atoms of the functional groups of ONC(CN)2- are coordinated to the Ag(I). Oxidation of styrene utilizing H2O2 as an oxidant in acetonitrile (CH3CN) was used as a model reaction to investigate the catalytic potential of the Ag (I) complex. The CH3CN was chosen as the solvent based on the data collected from Conductor like Screening Model for Real Solvents (COSMO-RS) study. The data indicate that the Ag [ONC(CN)2] complex was compatible and soluble in CH3CN. Different parameters such as styrene:H2O2 molar ratio, reaction time, catalyst mass, and reaction temperature were studied. Highest styrene conversion (36%) with 100% selectivity towards benzaldehyde (BZ) was achieved when 25 mg catalyst, 1:1 styrene to H2O2 molar ratio were used. The reaction was carried out at 303 K for 3 h. The catalytic conversion of styrene to BZ is proposed to take place via [Ag-H2O2] adduct with styrene oxide (StO) as an intermediate. Molecular Electrostatic Potential (MEP) shows that the Ag atom has the highest probability to coordinate with the oxygen atom of H2O2. The MEP data confirms the proposed mechanism.
  2. Saud, Safaa Najah, Muhammad Irsyad Abdullah, Siti Hadijah Shariff, Ram Singh, Ambrick Singh, Baharudin Hamzah, Nordayati Mat Lehat, et al.
    MyJurnal
    Blindness is an area of inadequate the visual conception because of physiological or even neurological aspects. The partial blindness corresponds to the insufficient integration in the expansion of the optic confidence or perhaps visual center of the eye, and also over-all total blindness is the complete inadequacy of the visual light perception. Within this research, a basic, inexpensive, friendly user, sensible blind assist technique is developed to be integrated with the portability of both blind and even visually impaired people in a particular region. The presented work consists of a wearable apparatus is made up of the head hat to facilitate the blind particular person to get around single-handedly safely and securely in order to keep away from any kind of obstructions that could be experienced, even if mounted and also mobile phone, to avoid virtually any probable accident. The primary function of this product is the Ultrasonic sensing unit which is able to inform the blind people if there exist any specific obstacles or otherwise not around them along with the vibrating motor probably would informs the blind people who which negative are the obstacles located. In addition, by pressing the home or work button this system will straight away link to MIT app inventor and the app will send a signal to Google maps to guide the blind people to its desired location. The implemented system is fast, and easy to use and an innovative affordable solution to blind and visually impaired people in third world countries.
  3. Ilyas S, Tabasum R, Iftikhar A, Nazir M, Hussain A, Hussain A, et al.
    Sci Rep, 2021 01 18;11(1):1708.
    PMID: 33462261 DOI: 10.1038/s41598-020-80579-5
    Ifosfamide is a widely used chemotherapeutic agent having broad-spectrum efficacy against several tumors. However, nephro, hepato, neuro cardio, and hematological toxicities associated with ifosfamide render its use limited. These side effects could range from organ failure to life-threatening situations. The present study aimed to evaluate the attenuating efficiency of Berberis vulgaris root extract (BvRE), a potent nephroprotective, hepatoprotective, and lipid-lowering agent, against ifosfamide-induced toxicities. The study design comprised eight groups of Swiss albino rats to assess different dose regimes of BvRE and ifosfamide. Biochemical analysis of serum (serum albumin, blood urea nitrogen, creatinine, alanine transaminase, aspartate transaminase, alkaline phosphatase, lactate dehydrogenase, total cholesterol, and triglycerides) along with complete blood count was performed. Kidney, liver, brain, and heart tissue homogenates were used to find malondialdehyde, catalase, and glutathione S-transferase levels in addition to the acetylcholinesterase of brain tissue. The results were further validated with the help of the histopathology of the selected organs. HeLa cells were used to assess the effect of BvRE on ifosfamide cytotoxicity in MTT assay. The results revealed that pre- and post-treatment regimens of BvRE, as well as the combination therapy exhibited marked protective effects against ifosfamide-induced nephro, hepato, neuro, and cardiotoxicity. Moreover, ifosfamide depicted a synergistic in vitro cytotoxic effect on HeLa cells in the presence of BvRE. These results corroborate that the combination therapy of ifosfamide with BvRE in cancer treatment can potentiate the anticancer effects of ifosfamide along with the amelioration of its conspicuous side effects.
  4. 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.
  5. Husaini Salleh, Supian Samat, Mohd Khalid Matori, Muhammad Jamal Md Isa, Mohd Ramli Arshad, Shahrul Azlan Azizan, et al.
    MyJurnal
    Heel Effect is the well known phenomena in x-ray production. It contributes the effect to image
    formation and as well as scattered radiation. But there is paucity in the study related to heel effect.
    This study is for mapping and profiling the dose on the surface of water phantom by using mobile
    C-arm unit Toshiba SXT-1000A. Based on the result the dose profile is increasing up to at least
    about 57% from anode to cathode bound of the irradiated area. This result and information can be
    used as a guide to manipulate this phenomenon for better image quality and radiation safety for
    this specific and dedicated fluoroscopy unit.
  6. Ho, S.E., Loong, S., Fatin Nur Laily R., Wan Nur Aizzati M., Muhammad Firdaus I.Z., Ho, Christopher C.K., et al.
    MyJurnal
    Neck pain presents as a symptom of dull pain or discomfort mainly along the trapezius muscle. Dry needling is an invasive procedure which uses acupuncture needle directed at myofascial trigger points. The aim of the study was to evaluate the effectiveness of dry needling in managing patients with neck pain. A pre-test-post-test interventional study design was used. Patient education package was provided to 32 respondents who fulfilled the inclusion criteria. A 13-item Pain Catastrophizing Scale (PCS) questionnaire was used to assess Rumination, Magnification and Helplessness. Subjective pain intensity was measured by Visual Analogue Scale (VAS). These questionnaires were given before and after the dry needling intervention. The findings reported that respondents scored high in pre-test total PCS score (27.41±13.652). Post-test result revealed a significant improvement in total PCS score (23.06±13.938) (p = 0.000). Post-test VAS score (4.78±1.237) was also significantly better than pre-test (6.47±1.414) (p = 0.000). There was no significant difference in pre-test PCS in terms of marital status (p > 0.05) whereas there was significant difference between marital status and rumination in post-test (Z = -2.303, p = 0.021). There was significant difference between pre-test magnification in terms of respondents’ occupation (p = 0.008) and race (p = 0.035) but no significant difference in post-test. Respondents’ age group showed no significant differences between pre-test and post-test PCS and VAS (p > 0.05). In conclusion, patients who received dry needling showed improvement in pain intensity and catastrophizing towards neck pain.
  7. Maryam Farooqui, Mohamed Azmi Hassali, Aishah Knight Abdul Shatar, Asrul Akmal Shafie, Muhammad Aslam Farooqui, Fahad Saleem, et al.
    MyJurnal
    Objectives: Prayers, spiritual healing, yoga, meditation, t'ai chi, qigong and support groups are classified as mind body complementary therapies (MBCTs). The study aimed to examine the prevalence of MBCTs use and the Health Related Quality of Life (HRQoL) in a group of Malaysian cancer patients.
    Methods: This crosssectional study was conducted on 184 cancer patients at the oncology clinic of Penang general hospital, Malaysia. MBCTs was assessed using a self- administered questionnaire while the HRQoL of the participants was assessed by using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30).
    Results: Among the complementary and alternative medicines (CAM) users, 75(40.7%) patients self-reported using MBCTs while having cancer. Majority of MBCTs users were female 60(80%, p=0.01), aged between 38 and 57 (58%), and were of Malay ethnicity (61%). Socio-demographic factors including age (r=0.15, p=0.03) and monthly house-hold income (r= -0.25, p<0.001) were significantly correlated with MBCTs use. Prayers for health reasons was the most frequently practised MBCTs modality, followed by spiritual practices 20(10.8%), meditation 7(5.9%), t'ai chi 7(3.8%), music therapy 4(2.1%), qigong 1(0.5%), hypnotherapy 1(0.5%), and reiki 1(0.5%). Recommendations from friends and family members 53(70%) were the most common reasons of MBCTs use followed by patient's own will 22(29.3%). Health related Quality of Life (HRQoL) scores showed significant difference in all functional and symptoms scores among MBCTs users and non-users (p<0.05). Conclusion: The study helps to identify numerous MBCTs commonly practised by a group of Malaysian cancer patients. Prayers specifically for health reasons and spiritual practices were somewhat common among patients. Viewing MBCTs, not as alternative but to complement conventional cancer therapies may help to address cancer patients' emotional and psychological needs.
    Study site: Oncology clinic, Hospital Pulau Pinang, Malaysia
  8. Mohd Hamzah Harun, Elias Saion, Noorhana Yahya, Anuar Kassim, Ekramul Mahmud, Muhammad Yousuf Hussain, et al.
    MyJurnal
    The composite polymer films of polyvinyl alcohol/polypyrrole/chloral hydrate (PVA-PPy-CH) had been prepared. Effects of J-rays on the electrical conductivity of the composite polymer films had
    been investigated by using Inductance Capacitance Resistance meter (LCR) meter at a frequency
    ranging from 20 Hz to 1 MHz. With the incorporation of chloral hydrate in the polymer sample, the conductivity increased indicates that it is capable to be used as dopant for polymerizing conjugated polymer. The electrical conductivity obtained increased as the dose increased, which is in the order of 10-5Scm-1 indicates that J-rays is capable to enhance the electrical conductivity of the composite polymer films. The parameter of s is in the range of 0.31 d s d 0.49 and obeyed simple power law dispersion Zs. The Scanning Electron Microscopy (SEM) micrographs reveal the formation of polypyrrole globules in polyvinyl alcohol matrix which increased as the irradiation dose was increased.
  9. Muhammad Akmal Asraf Mohamad Sharom, Zainol Abidin Ibrahim, Wan Ahmad Tajuddin Wan Abdullah, Megat Harun Al Rashid Megat Ahmad, Faridah Mohamad Idris, Abdul Aziz Mohamed
    MyJurnal
    Small angle neutron scattering (SANS) is used for probing the microstructure of materials in the range between 1-100 nm in dimension. The scattered neutrons from the target material were detected by a 128 x 128 array area sensitive, Helium gas-filled proportional counter, which is known as Position Sensitive Detector (PSD). The small angle neutron scattering (SANS) facility in Malaysian Nuclear Agency has been developed since 1995. The data acquisition system of this prototype facility consists of the two-dimensional Position Sensitive Detector (2D-PSD) and neutron monitor as a data grabber, TDC Histogram as a memory processing processor, two units of ORTEC 994 as a counter and timer and a computer as a data acquisition controller via GPIB interfacing protocol. This paper will describe on the development of GPIB interface for data acquisition of the SANS instrument on Windows based platform. The GPIB device interface and graphical user interface (GUI) for this data acquisition is developed using WaveMetrics Igor software.
  10. Mohd Hamzah Harun, Elias Saion, Noorhana Yahya, Anuar Kassim, Hussain, Muhammad Yousuf, Iskandar Shahrim Mustafa, et al.
    MyJurnal
    The composite polymer films of polyvinyl alcohol/polypyrrole/chloral hydrate (PVA-PPy-CH) had been prepared. Effects of γ-rays on the electrical conductivity of the composite polymer films had been investigated by using Inductance Capacitance Resistance meter (LCR) meter at a frequency ranging from 20 Hz to 1 MHz. With the incorporation of chloral hydrate in the polymer sample, the conductivity increased indicates that it is capable to be used as dopant for polymerizing conjugated polymer. The electrical conductivity obtained increased as the dose increased, which is in the order of 10-5 Scm-1 indicates that γ-rays is capable to enhance the electrical conductivity of the composite polymer films. The parameter of s is in the range of 0.31 d s d 0.49 and obeyed simple power law dispersion ωs. The Scanning Electron Microscopy (SEM) micrographs reveal the formation of polypyrrole globules in polyvinyl alcohol matrix which increased as the irradiation dose was increased.
  11. Azraf Azman, Mohd Rizal Mamat@Ibrahim, Anwar Abdul Rahman, Megat Harun Al Rashid Megat Ahmad, Abdul Aziz Mohamed, Muhammad Rawi Mohd Zin, et al.
    MyJurnal
    The temperature profile of a cryogenic system for cooling of beryllium filter of a small-angle neutron scattering (SANS) instrument of TRIGA MARK II PUSPATI research reactor was investigated using computational fluid dynamics (CFD) modeling and simulation. The efficient cooling of beryllium filter is important for obtaining higher cold neutron transmission for the SANS instrument. This paper presents the transient CFD results of temperature distributions via the thermal link to the beryllium and simulation of heat
    flux. The temperature simulation data are also compared with the experimental results for the cooling time and distribution to the beryllium.
  12. Ahmad Firdaus Mohd Salleh, Anita Talib, Mohamed Abdullah Marwi, Noor Hayati Mohd Isa, Syamsa Rizal Abdullah, Raja Muhammad Zuha Raja Kamal Bashah, et al.
    MyJurnal
    Chrysomya megacephala (Fabricius) dan Chrysomya rufifacies (Macquart) adalah merupakan dua spesies lalat penting yang boleh dijadikan sebagai penunjuk terbaik untuk menganggarkan selang masa kematian atau Post Mortem Interval (PMI) untuk kegunaan dalam sains forensik. Penentuan PMI adalah berdasarkan kepada saiz dan peringkat perkembangan larva. Kajian perkembangan telur, larva dan pupa lalat Ch. megacepahala dan Ch. rufifacies dijalankan di bawah suhu 27ºC, 30ºC dan 33ºC di makmal dengan menggunakan kebuk pertumbuhann serangga. Data daripada kajian digunakan untuk menghasilkan satu graf pertumbuhan dan Jam Darjah Terkumpul (ADH) bagi kedua-dua spesies. Ch. megacephala mengambil masa selama 9.15 hari pada suhu 27ºC, 8.54 hari (30ºC) dan 6.76 hari (33ºC) untuk melengkapkan satu kitar hidup. Pada C. rufifacies pula, kitar hidupnya lebih lama berbanding Ch. megacephala iaitu 9.92 hari pada suhu 27ºC, 9.13 hari (30ºC) dan 7.44 hari (33ºC). Telur bagi kedua-dua spesies menetas lebih cepat pada suhu 33ºC berbanding dua suhu yang lainnya. Nilai ADH yang rendah pada sesuatu suhu, menunjukkan sesuatu spesies lebih cepat melengkapkan suatu kitar hidup. Penemuan ini berguna dalam menganggarkan selang masa kematian bagi mayat yang dijumpai pada suhu persekitaran yang berlainan.
  13. Ahmad G, Rasool N, Ikram HM, Gul Khan S, Mahmood T, Ayub K, et al.
    Molecules, 2017 Jan 27;22(2).
    PMID: 28134790 DOI: 10.3390/molecules22020190
    The present study describes palladium-catalyzed one pot Suzuki cross-coupling reaction to synthesize a series of novel pyridine derivatives 2a-2i, 4a-4i. In brief, Suzuki cross-coupling reaction of 5-bromo-2-methylpyridin-3-amine (1) directly or via N-[5-bromo-2-methylpyridine-3-yl]acetamide (3) with several arylboronic acids produced these novel pyridine derivatives in moderate to good yield. Density functional theory (DFT) studies were carried out for the pyridine derivatives 2a-2i and 4a-4i by using B3LYP/6-31G(d,p) basis with the help of GAUSSIAN 09 suite programme. The frontier molecular orbitals analysis, reactivity indices, molecular electrostatic potential and dipole measurements with the help of DFT methods, described the possible reaction pathways and potential candidates as chiral dopants for liquid crystals. The anti-thrombolytic, biofilm inhibition and haemolytic activities of pyridine derivatives were also investigated. In particular, the compound 4b exhibited the highest percentage lysis value (41.32%) against clot formation in human blood among all newly synthesized compounds. In addition, the compound 4f was found to be the most potent against Escherichia coli with an inhibition value of 91.95%. The rest of the pyridine derivatives displayed moderate biological activities.
  14. Salman M, Shehzadi N, Hussain K, Saleem F, Khan MT, Asif N, et al.
    Am J Infect Control, 2017 Feb 01;45(2):e23-e25.
    PMID: 28159068 DOI: 10.1016/j.ajic.2016.11.019
    This cross-sectional study aimed to evaluate the knowledge of a Pakistani university population (students and employees) regarding Ebola virus disease. A total of 2,200 individuals were approached and 1,647 were enrolled in the study. We observed that the vast majority of study participants (91.8%) had inadequate knowledge of Ebola virus disease (knowledge score ≤ 12). Our findings highlight the need to increase the knowledge of Ebola virus disease by using multidimensional approach involving awareness campaigns, print, electronic, and social media.
  15. Ikram HM, Rasool N, Zubair M, Khan KM, Abbas Chotana G, Akhtar MN, et al.
    Molecules, 2016 Jul 27;21(8).
    PMID: 27472312 DOI: 10.3390/molecules21080977
    The present study describes several novel 2,5-biaryl-3-hexylthiophene derivatives (3a-i) synthesized via a Pd(0)-catalyzed Suzuki cross-coupling reaction in moderate to good yields. The novel compounds were also analyzed for their anti-thrombolytic, haemolytic, and biofilm inhibition activities. In addition, the anti-tumor activity was also evaluated in vitro for newly-synthesized compounds, where 3-hexyl-2,5-bis(4-(methylthio)phenyl)thiophene exhibited the best anti-tumor activity against 4T1 cells with IC50 value of 16 μM. Moreover, 2,5-bis(4-methylphenyl)-3-hexylthiophene showed the highest activity against MCF-7 cells with an IC50 value of 26.2 μM. On the other hand, the compound 2,5-bis(4-chloropheny)-3-hexylthiophene exhibited excellent biofilm inhibition activity. Furthermore, the compound 2,5-bis(3-chloro-4-fluorophenyl)-3-hexylthiophene also exhibited better anti-thrombolytic and hemolytic activity results as compared to the other newly-synthesized compounds.
  16. Ibrahim M, Mikail MA, Ahmed IA, Hazali N, Abdul Rasad MSB, Abdul Ghani R, et al.
    Eur J Nutr, 2018 Aug;57(5):1817-1828.
    PMID: 28516253 DOI: 10.1007/s00394-017-1466-3
    PURPOSE: Baccaurea angulata (common names: belimbing dayak or belimbing hutan) is a Malaysian underutilized fruit. The preliminary work on B. angulata fruit juice showed that it possesses antioxidant properties. Therefore, further work is needed to confirm the efficacy and proper dosage of B. angulata as a potential natural antioxidant. The present study was thus carried out to compare the effects of three different B. angulata whole fruit (WF) juice doses administered at nutritional doses of 0.50, 1.00 and 1.50 ml/kg/day on plasma, aorta and liver malondialdehyde (MDA) levels, antioxidant enzymes (superoxide dismutase, glutathione peroxidase and catalase) as well as total antioxidant capacity in rabbits fed high-cholesterol diet.

    METHODS: Thirty-five male rabbits of New Zealand strain were randomly assigned to seven groups. For 12 weeks, group CH was fed 1% cholesterol diet only; group C1 was fed 1% cholesterol diet and 0.50 ml/kg/day B. angulata WF juice; group C2 was fed 1% cholesterol diet and 1.00 ml/kg/day B. angulata WF juice; group C3 was fed 1% cholesterol diet and 1.50 ml/kg/day B. angulata WF juice; group N was fed standard pellet only; group N1 was fed standard pellet and 0.50 ml/kg/day B. angulata WF juice; and group N2 was fed standard pellet and 1.00 ml/kg/day B. angulata WF juice.

    RESULTS: The three doses reduced the formation of MDA and enhanced the expression of endogenous antioxidant enzymes. The highest dose used (1.50 ml/kg/day) was, however, seen as the most potent.

    CONCLUSION: Higher doses of B. angulata juice exerted better antioxidant activity.

  17. Muhammad Wafiuddin Ahmad, Ed Simor Khan, Rajandra Kumar, Zamzuri Zakaria, Ahmad Faiza, Haidar Nusuruddin, et al.
    MyJurnal
    Adolescent idiopathic scoliosis (AIS) is the most common spinal deformity among teenager. For those indicated, early surgical intervention allows better surgical correction due to flexibility of the spine during teenage years, hence good functional outcome and better cosmetic can be expected. In this case report, there is the management of four patients surgically using the posterior spinal instrumentation and fusion. Pre-operatively patients were examined at IIUM Medical Centre spine clinic, all necessary investigations were carried out. A thorough explanation was done to patient and parents regarding procedure, risk and benefit. All patients were treated using the same surgical technique. Neuromonitoring was used throughout the whole surgery until skin closure. All patients were hospitalized around one week. Post-operatively patients were followed up at two weeks, six weeks, three months, and every six months thereafter. It is important for clinicians to identify patients with AIS as early detection and timely treatment will change the natural history of curve progression. Surgical intervention when necessary will be easier and with less risk of complications when surgery was carried out during teenage years as the spine is more flexible and the deformity is less severe.
  18. Lim Kuang Hock, Heng Pei Pei, Muhammad Fadhli Mohd Yusoff, Teh Chien Huey, Sumarni Mohamad Ghazali, Lim Hui Li, et al.
    MyJurnal
    Introduction: Tobacco induced illness remains a major contribution to premature death and global burden of dis- eases. The introduction of MPOWER policies by World Health Organization held the value to monitor the imple- mentation of the anti-smoking measures in all signatory countries. This paper aimed to investigate the application of the six MPOWER indicators among Malaysia population. Methods: We utilized the data of Global Adult Tobacco Survey-Malaysia (GATS-M) which recruited 5112 nationally representative samples of Malaysians of 15 years old and above. Descriptive statistical analysis was used to illustrate the social demographic characteristic of the respon- dents while cross tabulation was employed to describe all elements of the MPOWER indicators. Results: About one quarter (23.1%) of Malaysian adults were current tobacco users. The SHS exposure at home (38.4%) and restaurant (42.1%) were high. Approximately eight in ten (80.2%) of the smokers intended to quit, while for those attempted to quit in past one year, 9.0% utilized pharmacotherapy and 4.4% attended counseling. The awareness about tobacco related diseases was generally excellent. The overall tax make up of the cigarettes’ retail price ranging from 41.7% up to 80%. Conclusion: Tobacco consumption remains prevalent and plateau among Malaysian adults over the last two decades with substantial proportion of the population exposed to SHS. The inadequacy in the current anti-smoking policies needs urgent improvement in order to reduce the smoking norms among Malaysians population besides to achieve the ultimate goal of tobacco control end game by year 2045.
  19. Nursyamfarhani Akashah, Siti Najihah Solehin, Marsheilla Lia Janing, Nur Aina Yusra Manap, Nor Shahida Ab Rahman, Muhammad Abdul Latiff Abu Bakar, et al.
    MyJurnal
    Sea cucumber or locally known as gamat and timun laut is a well-known attraction
    of Pulau Langkawi, Kedah, Malaysia. Not only limited to Pulau Langkawi, sea
    cucumber can also be found in other coastal water areas of Malaysia. However,
    the species richness and genetic diversity of sea cucumber in Pulau Tinggi, Johor
    is still unknown to the marine scientific communities, especially for Holothuria
    (Mertensiothuria) leucospilota, the most dominant species in Malaysia.
    Therefore, this study aimed to generate DNA barcodes of H. leucospilota from
    Pulau Tinggi. Protein-coding cytochrome c oxidase 1 (CO1) mtDNA gene was
    used as it is commonly and widely used for molecular species identification via
    DNA barcoding. Polymerase chain reaction (PCR) and DNA sequencing were
    incorporated to generate the DNA barcodes of CO1 mtDNA gene. The BLAST
    program confirmed the species status of the sea cucumber specimens as H.
    leuscospilota or locally known as bat puntil or white threads fish. The application
    for GenBank, NCBI, U.S. National Library of Medicine registration was
    successfully accepted on October 17, 2019 with accession numbers of MN580537
    and MN580538). The phylogenetic trees i.e neighbor joining tree (NJ, distancebased
    method), maximum parsimony tree (MP, character-based method) and
    maximum likehood tree (ML, character-based method) reconstructed using
    MEGA X software version 10.0.5 (BETA) further supported the species status of
    the sea cucumber specimens from Pulau Tinggi as H. leuscospilota. This is the
    first record of CO1 mtDNA barcodes of H. leuscospilota from Pulau Tinggi,
    Johor, Malaysia.
  20. Abu Bakar S, Jusoh N, Mohamed A, Muqoyyanah M, Othman MHD, Mamat MH, et al.
    Environ Sci Pollut Res Int, 2021 Dec;28(46):65171-65187.
    PMID: 34231144 DOI: 10.1007/s11356-021-14918-y
    In this work, waste cooking palm oil (WCPO)-based carbon nanotubes (CNTs) with encapsulated iron (Fe) nanoparticles have been successfully produced via modified thermal chemical vapor deposition method. Based on several characterizations, the dense WCPO-based CNT was produced with high purity of 89% and high crystallinity proven by low ID/IG ratio (0.43). Moreover, the ferromagnetic response of CNTs showed that the average coercivity and magnetization saturation were found to be 551.5 Oe and 13.4 emu/g, respectively. These produced WCPO-based CNTs were further used as heavy metal ions adsorbent for wastewater treatment application. Some optimizations, such as the effect of different adsorbent dosage, varied initial pH solution, and various heavy metal ions, were investigated. The adsorption studies showed that the optimum adsorbent dosage was 1.8 g/L when it was applied to 100 mg/L Cu (II) solution at neutral pH (pH 7). Further measurement then showed that high Cu (II) ion removal percentage (~80%) was achieved when it was applied at very acidic solution (pH 2). Last measurement confirmed that the produced WCPO-based CNTs successfully removed different heavy metal ions in the following order: Fe (II) > Zn (II) ≈ Cu (II) with the removal percentage in the range of 99.2 to 99.9%. The adsorption isotherm for Cu (II) was better fitted by Langmuir model with a correlation coefficient of 0.82751. WCPO-based CNTs can be a potential material to be applied as adsorbent in heavy metal ion removal.
Filters
Contact Us

Please provide feedback to Administrator (afdal@afpm.org.my)

External Links