Displaying publications 21 - 40 of 143 in total

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  1. Lasekan O, Dabaj F
    Foods, 2020 Aug 17;9(8).
    PMID: 32824398 DOI: 10.3390/foods9081129
    The key aroma constituents in the volatile fractions isolated FROM two differently processed fry breads by solvent-assisted flavor evaporation were characterized by an aroma extract dilution analysis (AEDA). Twenty-two compounds were identified with flavor dilution (FD) factor ranges of 2-516. Among them, 13 compounds (FD ≥ 16) were quantified by stable isotope dilution assays and analyzed by odor activity values (OAVs). Of these, 11 compounds had OAVs ≥ 1, and the highest concentrations were determined for δ-decalactone and 2,3-butanedione. Two recombination models of the fry breads showed similarity to the corresponding fry breads. Omission tests confirmed that aroma-active constituents, such as δ-decalactone (oily/peach), 2-acetyl-1-pyrroline (roasty/popcorn-like), 3-methylbutanal (malty), methional (baked potato-like), 2,3-butanedione (buttery), phenyl acetaldehyde (flowery), (E,E)-2,4-decadienal (deep-fried), butanoic acid, and 3-methylbutanoic acid, were the key aroma constituents of fry bread. In addition, 3-methoxy-4-vinylphenol (smoky) and 4-hydroxy-2,5-dimethyl-3(2H)-furanone were also identified as important aroma constituents of fry bread.
    Matched MeSH terms: Smoke
  2. Paudel S, Shankar PR, Subedi N, Palaian S
    PLoS One, 2023;18(10):e0291265.
    PMID: 37862336 DOI: 10.1371/journal.pone.0291265
    INTRODUCTION: Bronchial asthma continues to be a problem in the Himalayan country of Nepal. This study explored the impact of bronchial asthma on patients' lives in a hill village in Syangja district, Nepal, and obtained information about the perceived impact of the illness, knowledge of the disease, self-care behaviors and treatment among patients.

    MATERIAL AND METHODS: The study site is the village of Jyamire (located at an elevation between 900 to 1200 m) Syangja district. Individuals suffering from asthma residing in the village aged 18 years or above were included. Semi-structured interviews were conducted face-to-face with the respondents at their homes using an interview guide. The interviews were audio recorded, transcribed in the Nepali language, and then translated into English for further analysis.

    RESULTS: Most participants were female, between 18 to 60 years of age, and housewives. Most houses were built of mud and poorly ventilated. Gas was used for cooking though firewood was also used. Most used to get an average of three serious attacks a year both during winter and summer. The themes that emerged were the number and seasonal variation in attacks, the perceived effect of asthma on their lives and social interactions, the knowledge of the interviewee about the disease, the impact of asthma on their socioeconomic status, and treatment and self-care behaviors. Residing in a hill village required them to walk up and down several times a day and the disease seriously impacted their lives. The smoke produced during different ceremonies and during cooking also worsened their asthma.

    CONCLUSION: Findings suggest, the existence of multiple factors, a few unique to Nepal contributing to poor asthma control. Though the recent socioeconomic improvement has led to improved prevention and treatment options, asthma seriously affected the patients.

    Matched MeSH terms: Smoke
  3. Lee J, Lim S, Lee K, Guo X, Kamath R, Yamato H, et al.
    Int J Hyg Environ Health, 2010 Sep;213(5):348-51.
    PMID: 20542729 DOI: 10.1016/j.ijheh.2010.05.007
    Exposure to secondhand smoke (SHS) is a major threat to public health. Asian countries having the highest smoking prevalence are seriously affected by SHS. The objective of the study was to measure SHS levels in hospitality venues in seven Asian countries and to compare the SHS exposure to the levels in Western countries. The study was carried out in four types of related hospitality venues (restaurant, café, bar/club and entertainment) in China, India, Japan, Korea, Malaysia, Pakistan and Sri Lanka. Real-time measurement of particulate matter of <2.5microm aerodynamic diameter (PM(2.5)) was made during business hour using a handheld laser operated monitor. A total of 168 venues were measured in seven countries. The average indoor PM(2.5) level was 137microg/m(3), ranging from 46microg/m(3) in Malaysia to 207microg/m(3) in India. Bar/club had the highest PM(2.5) level of 191microg/m(3) and restaurants had the lowest PM(2.5) level of 92microg/m(3). The average indoor PM(2.5) level in smoking venues was 156micro/m(3), which was 3.6 times higher than non-smoking venues (43microg/m(3)). Indoor PM(2.5) levels were significantly associated with country, type of venue, smoking density and air exchange rate (p<0.05). In the seven Asian countries, PM(2.5) levels were high due to SHS in public places. The current levels are comparable to the levels in Western countries before the adoption of smoke-free policy. Since Asian country has high prevalence of SHS in public places, there is an urgent need for comprehensive smoke-free regulation in Asian countries.
    Matched MeSH terms: Tobacco Smoke Pollution/analysis; Tobacco Smoke Pollution/statistics & numerical data*
  4. Tee GH, Hairi NN, Nordin F, Choo WY, Chan YY, Kaur G, et al.
    Asian Pac J Cancer Prev, 2015;16(9):3659-65.
    PMID: 25987018
    BACKGROUND: Waterpipe tobacco smoking has becoming popular especially among young people worldwide. Smokers are attracted by its sweeter, smoother smoke, social ambience and the misconception of reduced harm. The objective of this study was to systematically review the effects of waterpipe tobacco policies and practices in reducing its prevalence.

    MATERIALS AND METHODS: A systematic review was conducted electronically using the PubMed, OVID, Science Direct, Proquest and Embase databases. All possible studies from 1980 to 2013 were initially screened based on titles and abstracts. The selected articles were subjected to data extraction and quality rating.

    RESULTS: Three studies met the inclusion criteria and were eligible for this review. Almost all of the waterpipe tobacco products and its accessories did not comply with the regulations on health warning labelling practices as stipulated under Article 11 of WHO FCTC. In addition, the grisly new warning labels for cigarettes introduced by Food and Drug Administration did not affect hookah tobacco smoking generally. Indoor air quality in smoking lounges was found to be poor and some hookah lounges were operated without smoke shop certification.

    CONCLUSIONS: Our findings revealed the availability of minimal information on the practices in controlling waterpipe smoking in reducing its prevalence. The lack of comprehensive legislations or practices in controlling waterpipe smoking warrants further research and policy initiatives to curb this burgeoning global epidemic, especially among the vulnerable younger population.
    Matched MeSH terms: Tobacco Smoke Pollution/adverse effects; Tobacco Smoke Pollution/prevention & control*
  5. Chong VH, Yaakub AB
    Singapore Med J, 2007 Jun;48(6):592; author reply 593.
    PMID: 17538765
    Matched MeSH terms: Smoke Inhalation Injury/etiology*; Smoke Inhalation Injury/therapy
  6. Lim KH, Teh CH, Nik Mohamed MH, Pan S, Ling MY, Mohd Yusoff MF, et al.
    BMJ Open, 2018 01 08;8(1):e017203.
    PMID: 29317411 DOI: 10.1136/bmjopen-2017-017203
    OBJECTIVES: Secondhand smoke (SHS) has been associated with increased morbidity and mortality. Therefore, the aims of the paper are to assess SHS exposure among non-smoking adults in Malaysia attending various smoking-restricted and non-restricted public areas according to the Control of Tobacco Product Regulations (CTPR) as well as its relationship with various sociodemographic variables.
    DESIGN: Data were extracted from a cross-sectional study, the Global Adults Tobacco Survey (GATS) 2011 which involved 3269 non-smokers in Malaysia. Data was obtained through face-to-face interviews using a validated pre-tested questionnaire. Factors associated with exposure to SHS were identified via multivariable analysis.
    RESULTS: The study revealed that almost two-thirds of respondents were exposed to SHS in at least one public area in the past 1 month, with a significantly higher exposure among males (70.6%), those with higher educational attainment (81.4%) and higher income (quintile 1%-73.9%). Besides, the exposure to SHS was almost four times higher in non-restricted areas compared with restricted areas under the CTPR (81.9% vs 22.9). Multivariable analysis revealed that males and younger adults at non-restricted areas were more likely to be exposed to SHS while no significant associated factors of SHS exposure was observed in restricted areas.
    CONCLUSIONS: The study revealed the prevalence of SHS exposure was higher among Malaysian adults. Although smoke-free laws offer protection to non-smokers from exposure to SHS, enforcement activities in restricted areas should be enhanced to ensure strict public abidance. In addition, legislation of restricted areas should also be extended to greatly reduce the SHS exposure among non-smokers in Malaysia.
    Study name: Global Adults Tobacco Survey (GATS-2011)
    Matched MeSH terms: Tobacco Smoke Pollution/prevention & control; Tobacco Smoke Pollution/statistics & numerical data*; Smoke-Free Policy*
  7. Sirichotiratana N, Sovann S, Aditama TY, Krishnan M, Kyaing NN, Miguel-Baquilod M, et al.
    Tob Control, 2008 Dec;17(6):372-8.
    PMID: 18669557 DOI: 10.1136/tc.2007.024190
    The Association of Southeast Asian Nations (ASEAN) has made tobacco use prevention a primary health issue. All ASEAN countries except Indonesia have ratified the World Health Organization Framework Convention on Tobacco Control (WHO FCTC), the world's first public health treaty on tobacco control.
    Matched MeSH terms: Tobacco Smoke Pollution/legislation & jurisprudence; Tobacco Smoke Pollution/prevention & control
  8. David AM, Mercado SP, Klein JD, Kaundan MSK, Koong HN, Garcia E
    Child Care Health Dev, 2017 09;43(5):774-778.
    PMID: 28480578 DOI: 10.1111/cch.12472
    BACKGROUND: Non-communicable diseases (NCDs) are generally considered diseases of adulthood, but NCD risk factors like tobacco use often are taken up during childhood and adolescence, and second-hand smoke exposure affects child survival and development.

    METHODS: At a regional meeting of the Asia Pacific Child and Family Health Alliance for Tobacco Control, members reviewed existing good practices of child-focused tobacco control approaches using health promotion strategies. These interventions were implemented nationally in Malaysia, the Philippines and Singapore.

    RESULTS: Three good practice national examples were identified that focused on creating supportive tobacco-free environments and upgrading cessation skills among paediatricians. These country examples highlight strategic areas to protect children and families from the harms of tobacco, as part of NCD prevention and control. Training paediatricians in brief cessation advice has enabled them to address tobacco-using parents. Fully enforcing smoke-free public areas has led to an increase in smoke-free homes. The Tobacco Free Generation is a tobacco control 'endgame' strategy that taps into a social movement to deglamorize tobacco use and empower youth born in and after year 2000 to reject tobacco and nicotine addiction.

    CONCLUSION: Tobacco control is pivotal in the fight against NCDs; health promotion strategies to protect children and youth from tobacco have a critical role to play in NCD prevention and control. Frontline health workers, including primary care paediatricians, need to step up and actively advocate for full implementation of the WHO Framework Convention on Tobacco Control, including tobacco tax increases and smoke-free areas, while monitoring patients and their parents for tobacco use and second-hand smoke exposure, preventing adolescent smoking uptake, and offering cessation support. A life-course approach incorporating child-focused efforts to prevent initiation of smoking and second-hand smoke exposure with measures promoting cessation among parents will offer the greatest chance of overcoming future tobacco-related NCD burden.

    Matched MeSH terms: Tobacco Smoke Pollution/adverse effects*; Tobacco Smoke Pollution/prevention & control*
  9. Zulkifli A, Abidin NZ, Abidin EZ, Hashim Z, Rahman AA, Rasdi I, et al.
    Asian Pac J Cancer Prev, 2014;15(12):4815-21.
    PMID: 24998546
    BACKGROUND: This study aimed to examine the relationship between respiratory health of Malaysian adolescents with secondhand smoke (SHS) exposure and smoke-free legislation (SFL) implementation.

    MATERIALS AND METHODS: A total of 898 students from 21 schools across comprehensive- and partial-SFL states were recruited. SHS exposures and respiratory symptoms were assessed via questionnaire. Prenatal and postnatal SHS exposure information was obtained from parental-completed questionnaire.

    RESULTS: The prevalence of respiratory symptoms was: 11.9% ever wheeze, 5.6% current wheeze, 22.3% exercise-induced wheeze, 12.4% nocturnal cough, and 13.1% self-reported asthma. SHS exposure was most frequently reported in restaurants. Hierarchical logistic regression indicates living in a comprehensive-SFL state was not associated with a lower risk of reporting asthma symptoms. SHS exposure in public transport was linked to increased risk for wheeze (Adjusted Odds Ratio (AOR) 16.6; 95%confidence interval (CI), 2.69-101.7) and current wheezing (AOR 24.6; 95%CI, 3.53-171.8).

    CONCLUSIONS: Adolescents continue to be exposed to SHS in a range of public venues in both comprehensive- and partial-SFL states. Respiratory symptoms are common among those reporting SHS exposure on public transportation. Non-compliance with SFL appears to be frequent in many venues across Malaysia and enforcement should be given priority in order to reduce exposure.

    Matched MeSH terms: Tobacco Smoke Pollution/adverse effects; Tobacco Smoke Pollution/legislation & jurisprudence*; Tobacco Smoke Pollution/prevention & control
  10. Tarmizi AH, Ismail R
    Food Sci Nutr, 2014 Jan;2(1):28-38.
    PMID: 24804062 DOI: 10.1002/fsn3.76
    Binary blends of palm olein (PO) with sunflower oil (SFO), canola oil (CNO), and cottonseed oil (CSO) were formulated to assess their stability under continuous frying conditions. The results were then compared with those obtained in PO. The oil blends studied were: (1) 60:40 for PO + SFO; (2) 70:30 for PO + CNO; and (3) 50:50 for PO + CSO. The PO and its blends were used to fry potato chips at 180°C for a total of 56 h of operation. The evolution of analytical parameters such as tocols, induction period, color, p-anisidine value, free fatty acid, smoke point, polar compounds, and polymer compounds were evaluated over the frying time. Blending PO with unsaturated oils was generally proved to keep most qualitative parameters comparable to those demonstrated in PO. Indeed, none of the oils surpassed the legislative limits for used frying. Overall, it was noted that oil containing PO and SFO showed higher resistance toward oxidative and hydrolytic behaviors as compared to the other oil blends.
    Matched MeSH terms: Smoke
  11. Fan, H.Y., Sharifudin, M.S., Hasmadi, M., Chew, H.M.
    MyJurnal
    A study to measure frying quality and stability of rice bran oil (RBO) compared to palm olein (PO) was conducted. The oils were used to fry French fries continuously for six hours a day up to five days at a temperature of 185 ± 5°C. Oil samples were collected and analyzed for free fatty acid (FFA), peroxide value (PV), smoke point, p-anisidine value (p-AV), iodine value (IV) and colour. At the end of the frying period for both oil samples, FFA, PV, colour and p-AV were increased whereas the IV and smoke point decreased. The rate of FFA formation of RBO was slightly lower which increased from 0.142% to 0.66% compared to PO which was from 0.079% to 0.93%. The PV of RBO showed consistent increased from 3.9 meq/kg to 13.4 meq/kg whereas PO with initial value at 3.4 meq/kg increased to 34.6 meq/kg on the fifth day. Smoke point of RBO and PO progressively dropped from 235°C to 188°C and 220°C to 178°C, respectively. The level of p-AV for RBO increased from 12.19 to 32.65 from the initial to the end of frying day whereas PO had higher rate of changes in p-AV which was from 10.45 to 60.75. The IV decreased over frying time where IV of RBO decreased from 94.5 to 66.5 while IV of PO decreased from 50.9 to 44.6. The colour of RBO showed increased in redness and yellowness but PO was darker at the end of the frying trial. In general, RBO showed better stability than the PO in deep frying of French fries.
    Matched MeSH terms: Smoke
  12. Nurul Fadzlin Hasbullah, Nuurul Iffah Che Omar, Nahrul Khair Alang Md Rashid, Jaafar Abdullah
    MyJurnal
    Nuclear technology has found a great need for use in medicine, industry, and research. Smoke
    detectors in our homes, medical treatments and new varieties of plants by irradiating its seeds are just a few examples of the benefits of nuclear technology. Portable neutron source such as Californium-252, available at Industrial Technology Division (BTI/PAT), Malaysian Nuclear Agency, has a 2.645 year half-life. However, 252 Cf is known to emit gamma radiation from the source. Thus, this chamber aims to provide a proper gamma shielding for samples to distinguish the use of mixed neutron with gamma-rays or pure neutron radiation. The chamber is compatible to be used with other portable neutron sources such as 241 Am-Be as well as the reactor TRIGA PUSPATI for higher neutron dose. This chamber was designed through a collaborative effort of Kulliyyah Engineering, IIUM with the Bahagian Teknologi Industri (BTI) team, Agency Nuklear Malaysia.
    Matched MeSH terms: Smoke
  13. Khoo SP, Lee, K.W.
    Ann Dent, 1995;2(1):-.
    MyJurnal
    A study was carried out to investigate whether smoking had any effect on the Langerhans cells in the oral mucosa, which might throw light onto the mechanism of malignant transformation of some keratotic lesions in the oral cavity. Thirty-two cases of keratotic lesions from biopsy specimens of smokers and non-smokers were studied. Langerhans cells were identified by immuno cytochemical staining for 5100 proteins and their densities quantified. Smokers were associated with a significant reduction in the Langerhans cell population compared to non-smokers. The mean values of Langellans cell density in light smokers and heavy smokers were 2 2 2 28.64/mm and 33.421mm respectively compared to 66.51/mm in non- smokers. There was a dose-response relation between the number of cigarettes smoked daily and the effect on cell counts. These findings of a local immunological effect of smoking on oral epithelium may explain the means by which cigarette smoking contributes to the development of oral cancer.
    Matched MeSH terms: Smoke
  14. Hadi, M.A., Azrina, M.R., Zamzila, A., Ariff, O.
    MyJurnal
    We report a case of sudden hypoxaemia after intubation in a patient who had smoked a few hours prior to a surgical procedure. The cause of his desaturation was not related to bronchial secretions, bronchospasm or obstruction of the upper airways but most likely due to reduced oxygen saturation in the body prior to surgery. We managed to secure the airway and prevent prolonged desaturation by instituting remedial measures. Our conclusion is that cessation of smoking is very important and need to be emphasized in all patients having surgery under general anaesthesia. This applies to emergency cases as well.
    Matched MeSH terms: Smoke
  15. Norfazillah Ab Manan, Mohd Rizal Abdul Manaf, Rozita Hod
    MyJurnal
    Introduction: The transboundary smoke haze has become a major concern as it had a wide ranging impact in Southeast Asia from the aspect of public health to national economics. This review aims to synthesize available literature in epidemiology, economics and haze related studies to provide essential information for the valuation of health costs associated with haze in Malaysia. Methods: Evidence on health economic impact of haze was gathered by conducting a literature review and collecting information on the health effects of haze and the cost of it as well as the hospitalization cost from medical illnesses and hospital admissions due to haze. Articles were taken from those that were published from 1999 to 2016.Results: The 1997 Asian Haze episode has caused increasing trend of prematurity of mortality and respiratory problems and several series of haze later had caused increased number of hospitalization. The cost impact on hospital admission ranges from MYR1.8 million in 2005 to MYR118.9 million in 2013. During the 1997 haze, the incremental cost of illness (COI) was noted to be MYR 21million and it shot up to MYR 410 million during the 2013 haze. Conclusion: The haze gives a serious health effect to our country and our neighbours. These health effect has caused a significant health economy impact which include rise in hospital admission cost and medication, incremental cost of illness and extend to cost of medical-related leaves taken and lead to loss of income opportunities.
    Matched MeSH terms: Smoke
  16. Nuraisyah Hani Zulkifley, Suriani Ismail, Rosliza Abdul Manaf, Zulkifley Hamid
    MyJurnal
    Introduction: One of the known factors that hindered smoking cessation is nicotine dependence. Measurement of the nicotine dependence is important to better understand cigarette smoking addiction dependence and ways to overcome it. Among methods of nicotine dependence measurement are self-reported Fagerstrom Test for Nicotine Dependence (FTND) and biochemical assessment such as saliva cotinine. Biochemical assessment can be used to measure the accuracy of the self-reported measurement of nicotine dependence. Objective: To explore the correlation between the FTND and the saliva cotinine of the smokers in three different timeline. Methods: A total of 61 male smokers who currently smoke cigarette on daily basis were recruited. The study used the one-group pretest-posttest study design and the data were collected three times. The self-reported measurement were measured by using FTND and the biochemical assessment measured by using saliva cotinine from Saliva Bio oral swab (SOS) with the sensitivity of 0.15ng/ml. Data analysis was conducted by using Pearson correlation. Results: There was a significant association between the FTND score and saliva cotinine level of the smokers at baseline, second and third data collection (p=0.014, p=0.003, p
    Matched MeSH terms: Smoke
  17. ISBN: 978-963-3887-72-9
    Citation: Global Adult Tobacco Survey (GATS) Malaysia. Kuala Lumpur: Ministry of Health, Malaysia, 2012
    Fact sheet: http://moh.gov.my/images/gallery/Report/GATS_Malaysia.pdf
    Datasets: GATS_Malaysia_National_2011_SPSS.zip
    https://nccd.cdc.gov/GTSSDataSurveyResources/Ancillary/DataReports.aspx?CAID=2
    Study name: Global Adults Tobacco Survey (GATS-2011)
    Matched MeSH terms: Tobacco Smoke Pollution
  18. Abdullah N, Al-Junid SH, Looi ML, Chin SF, Mohd Haniff EA, Syed Zakaria SZ, et al.
    Background: Validation of self-reported questionnaire is very crucial in ensuring the quality and reliability of data collection.
    Objective: The aim of this study were i) to validate the questionnaire on tobacco smoke intake and second hand smoke exposure among The Malaysian Cohort (TMC) subjects through the determination of urinary cotinine levels, ii) to determine the optimal cut-off point of urine cotinine that discriminates smokers from non-smokers and iii) to estimate misclassification rate between self-reported smoking and urinary cotinine level.
    Methods: Urine samples from a total of 775 The Malaysian Cohort subjects (104 smokers, 102 former smokers and 569 non-smokers) were obtained and urinary cotinine levels were determined by high-performance liquid chromatography (HPLC). Differences between groups were compared using Kruskal Wallis and Mann-Whitney tests. The Receiver Operating Characteristic (ROC) curved was performed to define the optimal urinary cotinine cut-off point.
    Results: Urinary cotinine concentration significantly (p<0.001) correlated with smoking status (r=0.46), the average number of cigarettes smoked per day (r=0.53), duration of smoking (r=0.33) and number of cigarettes packed per year (r=0.47). Smokers and second hand smokers have significantly higher median cotinine levels (978.40 and 21.31 respectively) compared to non-smokers (15.52) and non-exposed (13.60) subjects. Cotinine level at cut-off value of 1.51 ng/mg creatinine is able to distinguish smokers and non-smokers with a sensitivity of 84.62% and specificity of 81.97%.
    Conclusion: The Malaysian Cohort self-reported smoking questionnaire is a reliable tool in assessing the use of tobacco and second hand smoke exposure among the subjects.
    Study name: The Malaysian Cohort (TMC) project
    Matched MeSH terms: Tobacco Smoke Pollution
  19. Fateh Addin Nejm Addin Al-Emad, Zaleha Md. Isa
    Int J Public Health Res, 2017;7(1):783-790.
    MyJurnal
    BACKGROUND: The aim of the study was to assess the knowledge and attitude of secondary school students in Sana'a Yemen related to exposure to second-hand smoking.
    METHODS: A cross-sectional study was conducted in Sana'a city. The total sample size was 336 students in which 63 were males and 273 were females. These students were stratified random sampling . Data were collected by using Questionnaire comprising of 3 parts: Part 1- consists of socio-demographic data. Part 2- consists of the knowledge regarding smoking and second-hand smoking and Part 3-consists of adolescents' attitude in relation to second-hand smoking.
    RESULTS: Out of 336 students, majority were between 14-18 years old (75.9%), males (81.2%) , (55.7%)of them was fathers' occupation private employee and low educated mother was (86.3%).The students who do not have smoking habit were (94.3%),and those who do not have friends with the habit of smoking was (57.4%). (57.10) having some one else at home who smokes beside them .The reaction of non printed mass media for SHS warning was (83.3%) . The exposed to smoke out door was (60.1%) . In this study, the majority of students had inadequate knowledge about the second-hand smoke was (52.7%). A higher percentage of students who had unfavorable attitudes toward secondhand smoke was(86.6%).
    CONCLUSION: We concluded that The level of knowledge and attitude about the second-hand smoke is relatively low among the secondary school student in Sana'a Yemen .The finding of this study emphasized the need of effective awareness programs to increase level of consciousness and knowledge regarding SHS. Keywords: Second-hand Smoking, Secondary School, Adolescent, Sana'a .
    Matched MeSH terms: Tobacco Smoke Pollution
  20. Hayder A. Alrazen, Ahmad, K.A.
    MyJurnal
    Diesel engines produce high emissions of nitrogen oxide, smoke and particulate matter. The challenge is to reduce exhaust emissions but without making changing their mechanical configuration. This paper is an overview of the effect of natural gas on the diesel engine emissions. Literature review suggests that engine load, air-fuel ratio, and engine speed play a key role in reducing the pollutants in the diesel engine emissions with natural gas enrichment. It is found that increasing the percentage of natural gas (CNG) will affect emissions. Nitrogen oxide (NOx) is decreased and increased at part loads and high loads respectively when adding CNG. The reduction in carbon dioxide (CO2), particulate matter (PM) and smoke are observed when adding CNG. However, carbon monoxide (CO) and unburned hydrocarbon (HC) are increased when CNG is added.
    Matched MeSH terms: Smoke
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