Displaying publications 1 - 20 of 238 in total

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  1. Mohamed MH
    Med J Malaysia, 2004 May;59 Suppl B:19-20.
    PMID: 15468798
    One of the emerging technologies in the area of plasma processing is plasma immersion ion implantation (PSII). The paper addresses the merits offered by the PSII technique especially in the area of biomaterial processing. Worldwide development status as well as the drive towards commercial applications is elaborated in an attempt to draw the attention to the importance of the process for Malaysia as well as south East Asia.
  2. Sim, F.S., Mohd Irwan Lu, N.A.L., Lee, Z.E.T., Mohamed, M.
    MyJurnal
    In this study, agriculture biomass was used to remove dissolved organic matter from peat swamp runoff. The functional groups and morphological properties of 6 tropical agriculture biomasses (coconut husk, rice husk, empty fruit bunch, sago hampas, saw dust and banana trunk) in their raw and citric acid–treated states were examined. The Fourier transform infrared (FTIR) spectra showed that various biomasses were typically characterised with lignocellulosic compounds. The spectra analysis further demonstrated that citric acid treatment resulted in the dissolution of lignin and hemicelluloses to various extents where carboxyl groups were also introduced. These changes hypothetically suggest improved adsorption ability. Treatment of peat swamp runoff with various untreated biomasses showed no adsorption. With the modified biomass, adsorption was evidenced, with rice husk illustrating the highest removal efficiency of 60% to 65%.The biosorbent can be used in the water treatment process especially for treating water with a high dissolved organic matter content. The spent sorbent can be subsequently applied as a soil conditioner as the dissolved organic fraction, commonly known as humic matter, possesses important agricultural value.
  3. Mostafa MM, Feizollah A, Anuar NB
    Multimed Tools Appl, 2023;82(8):12423-12443.
    PMID: 36157354 DOI: 10.1007/s11042-022-13908-7
    Since its inception, YouTube has been a source of entertainment and education. Everyday millions of videos are uploaded to this platform. Researchers have been using YouTube as a source of information in their research. However, there is a lack of bibliometric reports on research carried out on this platform and the pattern in the published works. This study aims at providing a bibliometric analysis on YouTube as a source of information to fill this gap. Specifically, this paper analyzes 1781 articles collected from the Scopus database spanning fifteen years. The analysis revealed that 2006-2007 were initial stage in YouTube research followed by 2008 -2017 which is the decade of rapid growth in YouTube research. The 2017 -2021 is considered the stage of consolidation and stabilization of this research topic. We also discovered that most relevant papers were published in small number of journals such as New Media and Society, Convergence, Journal of Medical Internet Research, Computers in Human Behaviour and the Physics Teacher, which proves the Bradford's law. USA, Turkey, and UK are the countries with the highest number of publications. We also present network analysis between countries, sources, and authors. Analyzing the keywords resulted in finding the trend in research such as "video sharing" (2010-2018), "web -based learning" (2012-2014), and "COVID -19" (2020 onward). Finally, we used Multiple Correspondence Analysis (MCA) to find the conceptual clusters of research on YouTube. The first cluster is related to user -generated content. The second cluster is about health and medical issues, and the final cluster is on the topic of information quality.
  4. Mohamed M, Diabcare-Asia 2003 Study Group
    Curr Med Res Opin, 2008 Feb;24(2):507-14.
    PMID: 18184454 DOI: 10.1185/030079908X261131
    OBJECTIVE: To collect information on diabetes management, including psychosocial aspects, in patients managed by specialists 5 years after they were first surveyed in 1998.

    METHODS: Data on demography, diabetes status, management and complications were collected via medical records, interview and laboratory assessments. HbA(1c) was analysed by a central laboratory prospectively.

    RESULTS: Patient profile was similar in the 1998 (N = 21,838) and 2003 cohorts (N = 15,549): 95% were diagnosed as type 2 diabetes mellitus and were obese (BMI approximately 25 kg/m(2)). Glycaemic control was unsatisfactory in many patients (mean HbA(1c) approximately 8%; fasting glucose approximately 9 mmol/L). Lipids were well-controlled but hypertension was not. The incidence of neuropathy ( approximately 33%) and cataract ( approximately 27%) were high. The majority ( approximately 71%) of patients in both cohorts were treated with oral antidiabetic drug (OAD) monotherapy; approximately 24% were on insulin therapy. Approximately half of the 2003 cohort reported a healthy state of well-being. Quality of life did not appear to have suffered as a result of having diabetes. However, many patients were worried about hypoglycaemic risk (53.9%) or worsening of diabetes (45.8%) and insulin initiation (64.5%).

    CONCLUSIONS: Although both cohorts were separate cross-sectional studies of diabetes management status in Asia, the results showed that the demography profile, glycaemic control and cardiovascular risk factors were remarkably similar in both cohorts 5 years after the first survey. More concerted efforts are needed to increase diabetes awareness and education.

  5. Haron MN, Mohamed M
    Andrologia, 2016 Jun;48(5):525-31.
    PMID: 26289766 DOI: 10.1111/and.12473
    Exposure to prenatal stress is associated with impaired reproductive function in male rat offspring. Honey is traditionally used by the Malays for enhancement of fertility. The aim of this study was to determine the effect of honey on reproductive system of male rat offspring exposed to prenatal restraint stress. Dams were divided into four groups (n = 10/group): control, honey, stress and honey + stress groups. Dams from honey and honey + stress groups received oral honey (1.2 g kg(-1) body weight) daily from day 1 of pregnancy, meanwhile dams from stress and honey + stress groups were subjected to restraint stress (three times per day) from day 11 of pregnancy until delivery. At 10 weeks old, each male rat offspring was mated with a regular oestrus cycle female. Male sexual behaviour and reproductive performance were evaluated. Then, male rats were euthanised for assessment on reproductive parameters. Honey supplementation during prenatal restraint stress significantly increased testis and epididymis weights as well as improved the percentages of abnormal spermatozoa and sperm motility in male rat offspring. In conclusion, this study might suggest that supplementation of honey during pregnancy seems to reduce the adverse effects of restraint stress on reproductive organs weight and sperm parameters in male rat offspring.
  6. Krishnaswamy S, Mohamed M
    Med J Malaysia, 1985 Dec;40(4):330-2.
    PMID: 3842735
    A case of the Klippel-Feil syndrome presenting with schizophrenia is described. The Klippel-Feil syndrome is reported to be associated with abnormalities in many systems of the body, but its association with a schizophrenic illness has not been described.
  7. Dahlan SA, Mohamed M
    MyJurnal
    ABSTRACTS FOR INTERNATIONAL FAMILY HEALTH CONFERENCE 2019 (I-FaH 2019). Health Intervention Towards Community Wellness, Held at Oriental Crystal Hotel, Kajang, Selangor, Malaysia. 4-5th September, 2019
    Introduction: In Malaysia, the proportion of safe deliveries remains above 98% since 2010. Safe delivery is defined as deliveries conducted by trained personnel; either doctors, nurses with midwifery training or community nurses. Despite the good coverage of trained personnel and continuous effort to promote birth preparedness among antenatal mothers, unsafe delivery still occur in Malaysia and reported as 0.5% in NHMS 2016.
    Methods: A retrospective analysis on the characteristics of unsafe deliveries from the national surveillance data for the period of 2015 to 2017 was carried out. Characteristics of mothers are extracted from the reports of unsafe delivery investigation by Ministry of Health Malaysia and descriptive analyses are carried out by year for trending.
    Results: Total of 985 unsafe deliver-ies were reported and investigated in 2015, 1201 in 2016 and 1045 in 2017. About 37.7% to 49.9% (n=453-521) of these deliveries were among Malaysians followed by 22.9% to 40% (n=239-394) among non-citizen without identification document and 11.1% to 27.6% (109-332 deliveries) among non-citizen with identification document. It is commonly reported among mothers aged 26 to 35 years old (38.6% to 43.4%; n=454-463) and multiparous (47.3% to 52.0%; n=494-512). About 25.5% to 35.4% (n=251-370) of these mothers never attended antenatal check-up. Five main reported reasons which had contributed to the unsafe deliveries in 2015 to 2017 were; invalid identification documents, financial constraints, transportation problems, far distance from health facilities and mother’s personal choice.
    Conclusion: These findings translate into possible intervention targeted the above population on unsafe deliveries. Multi-sectoral strategies and inter-agency partnership are needed in strengthening the intervention.
  8. Othman ZA, Wan Ghazali WS, Noordin L, Mohd. Yusof NA, Mohamed M
    MyJurnal
    Orlistat is a widely used drug in treating obesity as it promotes weight reduction. The aim of this study was to determine the protective effects of orlistat (10 mg/kg/day) on cardiovascular parameters and oxidative stress biomarkers in high-fat diet (HFD)-induced obese rats. Methods:Twenty-four male rats Sprague Dawley rats were divided into three groups and fed with normal diet (N), HFD and HFD with orlistat (HFD+O). Orlistat was administered daily by oral gavage and after six weeks, all rats were sacrificed. Results:Administration of orlistat along with HFD (HFD+O) has brought significant decreases in Lee obesity index and LDL level compared to HFD group. Activities of cardiac superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT) were significantly higher, whereas level of oxidised LDL was significantly lower in HFD+O group compared to HFD group. HFD group had significantly higher necrotic patch area in myocardium while minimal histological changes were seen in HFD+O group. Conclusion:This study may suggest that administration of orlistat at 10 mg/kg/day for 6 weeks may have protective effects against the changes on Lee obesity index, lipid profiles, cardiac oxidative stress biomarkers and histology of myocardium in HFD-induced obese rats possibly through its hypolipidaemic and antioxidant actions.
  9. Mohamed, M., Ariffin, H., Arasu, A., Tuck Soon, S.H., Abdullah, W.A., Lin, H.P.
    MyJurnal
    Fusarium species is an emerging genus of fungal pathogens which until recently were rare causes of human disease apart from localized infection of the skin and nails. Two cases of fungaemia due to Fusarium sp. in children are described. The first child, an 8-year old girl with acute myeloid leukaemia developed character-sitic pyoderma gangrenosum-like skin lesions before succumbing to disseminated Fusarium infection and acute respiratory distress syndrome. The second child, a 5-month old boy, developed pneumonia associated with a transient erythematous skin rash while on chemother-apy for congenital leukaemia. Both patients had Fusarium isolated from blood. The second child improved after six weeks of treatment with ampho-tericin B and granulocyte-macrophage colony stimulat-ing factor but ultimately she died of the disease follow-ing discharge. Fusarium spp should be recognised as an opportunistic pathogen in immunocompromised patients. Current literature suggests that liposomal amphotericin B in conjunction with leukocyte growth factors are the treatment of choice in this potentially fatal infection.
  10. Mohamed M. GahGah, Juhari Mat Akhir, Abdul Ghani M. Rafek, Ibrahim Abdullah
    Sains Malaysiana, 2009;38(6):827-833.
    The aim of this study is to investigate the factors that cause landslides in the area along the new road between Cameron Highlands and Gua Musang. Landslide factors such as lineaments have been extracted from remote sensing data (Landsat TM image) using ERDAS software. A soil map has been produced using field work and laboratory analysis, and the lithology, roads, drainage pattern and rainfall have been digitized using ILWIS software together with the slope angle and elevation from the Digital Elevation Model (DEM). All these parameters, which are vital for landslide hazard assessment, have been integrated into the geographical information system (GIS) for further data processing. Weightage for these landslide relevant factors related to their influence in landslide occurrence using the heuristic method has been carried out. The results from this combination through a modified ‘index overlay with multi class maps’ model was used to produce a landslide hazard zonation map. Five classes of potential landslide hazard have been derived as the following: very low hazard zone 17.27%, low hazard zone 39.35%, medium hazard zone 25.1%, high hazard zone 15.35% and very high hazard zone 2.93%. The results from this work have been checked through the landslide inventory using available aerial photos interpretation and field work, and show that the slope and elevation have the most direct affect on landslide occurrence.
  11. Gikonyo EW, Zaharah AR, Hanafi MM, Anuar RA
    ScientificWorldJournal, 2010 Sep 01;10:1679-93.
    PMID: 20842313 DOI: 10.1100/tsw.2010.174
    The effectiveness of different soil tests in assessing soil phosphorus (P) in soils amended with phosphate rocks (PRs) is uncertain. We evaluated the effects of triple superphosphate (TSP) and PRs on extractable P by conventional soil tests (Mehlich 3 [Meh3] and Bray-1 [B1]) and a nonconventional test (iron oxide-impregnated paper, strip). Extracted amounts of P were in the order: Meh3 >B1 > strip. All the tests were significantly correlated (p = 0.001). Acidic reagents extracted more P from TSP than PRs, while the strip removed equal amounts from the two sources. The P removed by the three tests was related significantly to dry matter yield (DMY), but only in the first harvest, except for B1. Established critical P levels (CPLs) differed for TSP and PRs. In PR-fertilized soils, CPLs were 27, 17, and 12 mg P kg(-1) soil for Meh3, B1, and strip, respectively, and 42, 31, and 12 mg P kg(-1) soil, respectively, in TSP-fertilized soils. Thus, the strip resulted in a common CPL for TSP and PRs (12 mg P kg(-1) soil). This method can be used effectively in soils where integrated nutrient sources have been used, but there is need to establish CPLs for different crops. For cost-effective fertilizer P recommendations based on conventional soil tests, there is a need to conduct separate calibrations for TSP- and PR-fertilized soils.
  12. Farghali MM, Abdelazim IA, El-Ghazaly TE
    Prz Menopauzalny, 2021 Sep;20(3):116-121.
    PMID: 34703411 DOI: 10.5114/pm.2021.109769
    Introduction: Growing interest has focused on the relation between chronic endometritis (CE) or asymptomatic inflammation of the endometrium and recurrent miscarriage (RM).The aim of the study was to assess the relation between CE and RM and the accuracy of hysteroscopy in diagnosing CE.

    Material and methods: One hundred and ten (110) women with unexplained RM were included in this study. Participants were subjected to diagnostic hysteroscopy for uterine cavity, and endometrium evaluation. The diagnosis of CE during hysteroscopic examination was based on CE-related hysteroscopic signs (micro-polyps, stromal edema, and/or hyperemia). At the end of hysteroscopy, an endometrial biopsy was taken from participants for culture, and immunohistochemical (IHC) staining. Collected data were analyzed to assess the relation between CE and RM and the accuracy of hysteroscopy in diagnosing CE.

    Results: The prevalence of CE in women with RM was 31.8% using CE-related hysteroscopic signs, while it was 38.2% using IHC staining and endometrial cultures (p = 0.4). CE-related hysteroscopic signs had 64.1% sensitivity, 85.9% specificity, 71.4% positive predictive value (PPV), 81.3% negative predictive value (NPV), and 78.2% overall accuracy in diagnosing CE. Most cases of CE (> 81%) were caused by Mycoplasma and common pathogens.

    Conclusions: The prevalence of CE in women with RM was 31.8% using CE-related hysteroscopic signs, while it was 38.2% using IHC staining and endometrial cultures. CE-related hysteroscopic signs had 64.1% sensitivity, 85.9% specificity, 71.4% PPV, 81.3% NPV, and 78.2% overall accuracy in diagnosing CE. Most cases of CE (> 81%) were caused by Mycoplasma and common pathogens.

  13. Toumi A, Najaf K, Dhiaf MM, Li NS, Kanagasabapathy S
    PMID: 37000397 DOI: 10.1007/s11356-023-26530-3
    This study investigates the moderating role of environmental disclosures on the market performance of 48 Fintech and 140 non-Fintech firms during the pandemic using data from 2011 to 2022. Ordinary least squares and correlations were used for data analysis. The study's first finding revealed that Fintech firms had a better environmental performance (78.4%) than non-Fintech firms during the pandemic. The study's second finding indicated that environmental disclosures are crucial for shareholders and contributed almost 10.2% to the Fintech firms' market performance during the pandemic. This study's contribution is significant in enhancing the understanding of the shareholders' sensitivity towards sustainability disclosures during financial crisis. The findings of this study are essential for policymakers, start-up entrepreneurs, and shareholders.
  14. Chow MF, Yusop Z, Mohamed M
    Water Sci Technol, 2011;63(6):1211-6.
    PMID: 21436558 DOI: 10.2166/wst.2011.360
    This paper examines the storm runoff quality from a commercial area in south Johor, Malaysia. Six storm events with a total of 68 storm runoff samples were analyzed. Event Mean Concentration (EMC) for all constituents analysed showed large inter-event variation. Site mean concentrations (SMC) for total suspended solids (TSS), oil and grease (O&G), biochemical oxygen demand (BOD), chemical oxygen demand (COD), nitrate-nitrogen (NO(3)-N), nitrite-nitrogen (NO(2)-N), ammonia-nitrogen (NH(3)-N), total phosphorus (Total P) and Soluble P are 261, 4.31, 74, 192, 1.5, 0.006, 1.9, 1.12 and 0.38 mg/L, respectively. The SMCs at the studied site are higher than those reported in many urban catchments. The mean baseflow concentrations were higher than the EMCs for COD, Soluble P, NH(3)-N, NO(3)-N, Total P and NO(2)-N. However, the reverse was observed for TSS and O&G. All pollutants showed the occurrence of first flush phenomenon with the highest strength was observed for TSS, COD and NH(3)-N.
  15. Lau S, Mohamed M, Yen AT, Su'ut S
    Sci Total Environ, 1998 Jun 18;214:113-21.
    PMID: 9646520
    Heavy metals in the aquatic environment have to date come mainly from naturally occurring geochemical materials. However, this has been enhanced by human activity such as gold mining in the case of heavy metal pollution in Sg Sarawak Kanan. The high suspended solid loads in the river have quite efficiently removed most soluble metals from the water and trapped them in the bottom sediment. Three freshwater mollusc species were collected at the point source of the heavy metal pollutants and analysed for the heavy metal contents in their tissues and shells. Two of the mollusc species (Brotia costula and Melanoides tuberculata) are purely freshwater species while the Clithon sp. nr retropictus is able to survive in fresh and brackish water environments. The Brotia costula and the Clithon sp. are the edible species which are sold in the market. Accumulation of As, Cu, Fe, Se and Zn in all the three mollusc species were determined and the level of As in the tissues of Brotia costula and the Clithon sp. was much higher than the permissible level for human consumption. The mollusc species also demonstrated different preferences for the uptake of different metals. Variations in the heavy metal contents in the shell and tissues of the same species were also observed.
  16. Nasrulhaq-Boyce A, Mohamed MAH
    New Phytol, 1987 Jan;105(1):81-88.
    PMID: 33874033 DOI: 10.1111/j.1469-8137.1987.tb00112.x
    A comparative study of four Malayan ferns, Christensenia aesculifolia (Bl.) Maxon, Tectaria singaporeana (Wall.) Ching, Abacopteris multilineata (Wall.) Ching and Hymenophyllum polyanthos Sw. from shady habitats and another four, Dicranopteris linearis (Burm.) Und., Lygodium scandens (L.) Sw., Blechnum orientate Linn, and Stenochlaena palustris (Burm.) Bedd. from sunlit habitats showed that the total chlorophyll content expressed on a gram fresh weight basis was greater in the shade ferns. There was little difference in the chlorophyll content between the sun and shade ferns when it was expressed on a per unit leaf area basis. The protein and protohaem content was greater in the sun ferns. Measurements of the in vitro photochemical activities of the photosystems I and II in isolated chloroplasts by means of an oxygen electrode showed higher rates in the sun ferns. As determined by spectrophotometric analysis, the photosynthetic cytochrome content from isolated chloroplasts was greater in the sun ferns. The results indicate that the sun ferns have physiological characteristics favouring greater capacity for photosynthesis. Mitochondria isolated from the sun ferns showed faster rates of electron transport using exogenous NADH as substrate.
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