Browse publications by year: 2017

  1. Mustafah NM, Bakar NA, Fauzi AA, Hussein N
    Spinal Cord Ser Cases, 2017;3:17002.
    PMID: 28503319 DOI: 10.1038/scsandc.2017.2
    INTRODUCTION: Spinal cord injury (SCI) has increased over the years, and so has the survival. Women with SCI remain fertile and have equal chance of pregnancy.

    CASE PRESENTATION: We described a case of a 29-year-old lady with traumatic spinal cord injury (SCI) resultant with paraplegia in 2008, who conceived naturally 2 years after the injury. She only had her antenatal check-up at a low-risk antenatal center throughout her pregnancy and was not referred to specialized obstetric care. She did not appreciate active labor, and unexpectedly had a precipituous labor and gave birth in the bathroom.

    DISCUSSION: Pregnancy is relatively safe in women with spinal cord injury (SCI). However, disability-related issues can be exaggerated during pregnancy, delivery and post-partum periods. Thus, understanding common issues related to pregnancy in this population is important. Specialized obstetric care with rehabilitation input throughout antenatal and postnatal care is crucial for a good overall outcome of a pregnant woman with SCI.

  2. Hisamud-Din N, Mustafah NM, Fauzi AA, Hashim NM
    Spinal Cord Ser Cases, 2017;3:17020.
    PMID: 28503326 DOI: 10.1038/scsandc.2017.20
    INTRODUCTION: Extramedullary hematopoiesis (EMH) is the production of blood cell precursors outside the bone marrow that occur in various hematological diseases. In patients with thalassemia intermedia, ineffective erythropoiesis drives compensatory EMH in the liver, pancreas, pleura, spleen, ribs and spine.

    CASE PRESENTATION: We describe a patient with thalassemia intermedia who presented with acute neurological symptoms caused by paraspinal EMH, which responded well to combination therapy of steroid, hypertransfusion, laminectomy and excision of pseudotumor and hydroxyurea therapy to boost the formation of fetal haemoglobin.

    DISCUSSION: Prompt recognition of EMH based on clinical presentation and typical radiological findings should be made. Early treatment is recommended to prevent irreversible damage to the spinal cord.

  3. Adibi A, Maleki S, Adibi P, Etminani R, Hovsepian S
    Adv Biomed Res, 2017;6:47.
    PMID: 28503502 DOI: 10.4103/2277-9175.204590
    BACKGROUND: This study aimed to determine the prevalence of nonalcoholic fatty liver disease (NAFLD) and its related risk factors among the general population of Isfahan city located in the central part of Iran.

    MATERIALS AND METHODS: In this cross-sectional study, the prevalence of NAFLD among 483 general adult populations was determined using ultrasonography. Anthropometric and biochemical variables were compared in groups with and without NAFLD and their predictive value for occurrence of NAFLD was investigated also.

    RESULTS: Prevalence of NAFLD was 39.3%. Frequency of focal fatty infiltration (FFI), Grade I, Grade II, and Grade III of NAFLD was 9.5%, 21.1%, 7.2%, 1.4%, respectively. Prevalence of different types of NAFLD and FFI, was not different between female and male participants (P = 0.238). Ordinal regression was determined that all of the studied variables have significant predictive value for NAFLD (P < 0.001, γ = 0.615). Spearman correlation indicated that there was a significant relationship between NAFLD and BMI (r = 0.37, P < 0.001), age (r = 0.15, P = 0.001), FBS (r = 0.20, P < 0.001), cholesterol (r = 0.19, P < 0.001), triglyceride (r = 0.20, P < 0.001), LDL (r = 0.16, P < 0.001), AST (r = 0.17, P < 0.001), and ALT (r = 0.31, P < 0.001).

    CONCLUSIONS: Considering the high prevalence of NAFLD specially its lower grades among Isfahani adult general population and their association with studied variables, it seems that interventional studies which target-related mentioned risk factors could reduce the overall occurrence of NAFLD.

  4. Abdul Rahman N, Abd Halim MR, Mahawi N, Hasnudin H, Al-Obaidi JR, Abdullah N
    Biomed Res Int, 2017;2017:2038062.
    PMID: 28503566 DOI: 10.1155/2017/2038062
    Corn was inoculated with Lactobacillus plantarum and Propionibacterium freudenreichii subsp. shermanii either independently or as a mixture at ensiling, in order to determine the effect of bacterial additives on corn silage quality. Grain corn was harvested at 32-37% of dry matter and ensiled in a 4 L laboratory silo. Forage was treated as follows: bacterial types: B0 (without bacteria-control), B1 (L. plantarum), B2 (P. freudenreichii subsp. shermanii), and B3 (combination of L. plantarum and P. freudenreichii subsp. shermanii). Each 2 kg of chopped forage was treated with 10 mL of bacterial culture and allowed to ferment for 27 days. The first experiment determined the most suitable wavelength for detection of bacteria (490 nm and 419 nm for B1 and B2, resp.) and the preferable inoculation size (1 × 105 cfu/g). The second experiment analysed the effect of B1 and B2 applied singly or as a mixture on the fermentation characteristics and quality of corn silage. L. plantarum alone increased crude protein (CP) and reduced pH rapidly. In a mixture with P. freudenreichii, the final pH was the lowest compared to other treatments. As a mixture, inclusion of bacteria resulted in silage with lower digestibility than control. Corn silage treated with L. plantarum or P. freudenreichii either alone or mixed together produced desirable silage properties; however, this was not significantly better than untreated silage.
    MeSH terms: Aerobiosis; Zea mays/microbiology; Zea mays/chemistry; Fermentation; Hydrogen-Ion Concentration; Silage/microbiology*; Lactobacillus plantarum/metabolism; Lactobacillus plantarum/chemistry*; Propionibacterium freudenreichii/metabolism; Propionibacterium freudenreichii/chemistry*
  5. Kotirum S, Vutipongsatorn N, Kongpakwattana K, Hutubessy R, Chaiyakunapruk N
    Vaccine, 2017 06 08;35(26):3364-3386.
    PMID: 28504193 DOI: 10.1016/j.vaccine.2017.04.051
    INTRODUCTION: World Health Organization (WHO) recommends Rotavirus vaccines to prevent and control rotavirus infections. Economic evaluations (EE) have been considered to support decision making of national policy. Summarizing global experience of the economic value of rotavirus vaccines is crucial in order to encourage global WHO recommendations for vaccine uptake. Therefore, a systematic review of economic evaluations of rotavirus vaccine was conducted.

    METHODS: We searched Medline, Embase, NHS EED, EconLit, CEA Registry, SciELO, LILACS, CABI-Global Health Database, Popline, World Bank - e-Library, and WHOLIS. Full economic evaluations studies, published from inception to November 2015, evaluating Rotavirus vaccines preventing Rotavirus infections were included. The methods, assumptions, results and conclusions of the included studies were extracted and appraised using WHO guide for standardization of EE of immunization programs.

    RESULTS: 104 relevant studies were included. The majority of studies were conducted in high-income countries. Cost-utility analysis was mostly reported in many studies using incremental cost-effectiveness ratio per DALY averted or QALY gained. Incremental cost per QALY gained was used in many studies from high-income countries. Mass routine vaccination against rotavirus provided the ICERs ranging from cost-saving to highly cost-effective in comparison to no vaccination among low-income countries. Among middle-income countries, vaccination offered the ICERs ranging from cost-saving to cost-effective. Due to low- or no subsidized price of rotavirus vaccines from external funders, being not cost-effective was reported in some high-income settings.

    CONCLUSION: Mass vaccination against rotavirus was generally found to be cost-effective, particularly in low- and middle-income settings according to the external subsidization of vaccine price. On the other hand, it may not be a cost-effective intervention at market price in some high-income settings. This systematic review provides supporting information to health policy-makers and health professionals when considering rotavirus vaccination as a national program.

    MeSH terms: Cost-Benefit Analysis; Health Policy; Humans; Rotavirus Infections/prevention & control*; World Health Organization; Quality-Adjusted Life Years; Rotavirus Vaccines/economics; Rotavirus Vaccines/therapeutic use*; Mass Vaccination/economics*
  6. Jong ZW, Kassim NFA, Naziri MA, Webb CE
    J Vector Ecol, 2017 06;42(1):105-112.
    PMID: 28504428 DOI: 10.1111/jvec.12244
    The fundamental approach to the biological control of Aedes albopictus requires the mass rearing of mosquitoes and the release of highly competitive adults in the field. As the fitness of adults is highly dependent on the development of immatures, we aimed to identify the minimum feeding regime required to produce viable and competitive adults by evaluating three response parameters: development duration, immature mortality, and adult wing length. Our study suggests at least 0.60 mg/larva/day of larval diet composed of dog food, dried beef liver, yeast, and milk powder in a weight ratio of 2:1:1:1 is required to maximize adult fitness. With standardized protocols in mass rearing, intensive studies can be readily conducted on mosquito colonies to facilitate comparisons across laboratories. This study also evaluated the differences in response of laboratory and field strains under different feeding regimes. We found that strain alone did not exert substantial effects on all response parameters. However, the field strain exhibited significantly lower immature mortality than the laboratory strain under the minimum feeding regime. Females and males of the laboratory strain had longer wing lengths under nutritional constraint due to the higher mortality that resulted in reduced interactions with the remaining larvae. Meanwhile, the field strain exhibited heterogeneous duration of immature development compared with the laboratory strain. The disparities demonstrated by the two strains in this study suggest the effect of inbreeding surfaced after a long term of laboratory colonization. Despite the trade-offs resulting from laboratory colonization, the competitiveness of the laboratory strain of Ae. albopictus is comparable to the field strain, provided the larvae are fed optimally.
    MeSH terms: Aedes/growth & development*; Animals; Feeding Behavior*; Female; Inbreeding*; Larva/growth & development*; Male
  7. Khoo EJ, Aldubai S, Ganasegeran K, Lee BX, Zakaria NA, Tan KK
    Arch Argent Pediatr, 2017 06 01;115(3):212-219.
    PMID: 28504485 DOI: 10.5546/aap.2017.eng.212
    INTRODUCTION: Emotional exhaustion is an important component of burnout. Burnout is common among doctors. It affects the physical and mental health of doctors, their performance and the quality of care they provide. This study aimed to investigate the level and factors associated with emotional exhaustion among doctors in pediatric practice in Malaysia.

    POPULATION AND METHODS: A self-administered questionnaire was used in this multicenter cross-sectional study. It included questions on the socio-demographics, work characteristics, Emotional Exhaustion, Perceived Stress Scale and sources of job stress. Descriptive, univariate and multivariate analysis were conducted using the SPSS software.

    RESULTS: A total of 197 doctors working in the Pediatric department in eight hospitals returned complete questionnaire. High and moderate emotional exhaustion was reported by 25.4% and 24.4% doctors, respectively. In bivariate analysis, 29 out of the 38 items of sources of stress showed significant association with emotional exhaustion (p <0.05).The significant predictors of emotional exhaustion in the multivariate analysis were: scoring higher on the Perceived Stress Score, dealing with patient's psychosocial problems, disrespectful interactions with colleagues/ subordinates, lack of appreciation from supervisors, lack of incentives and promotions, time pressures and deadlines to meet, and setting unrealistic goals of having them imposed on oneself (p <0.05). The most common source of stress was dealing with difficult parents (80.2%).

    CONCLUSIONS: Emotional exhaustion is associated with sources of stress in the workplace but not with socio-demographic factors.

    MeSH terms: Adult; Burnout, Professional/etiology*; Cross-Sectional Studies; Emotions; Female; Hospitals, Public; Humans; Malaysia; Male; Pediatrics*; Self Report
  8. Abosadegh MM, Rahman SA, Saddki N
    Dent Traumatol, 2017 Oct;33(5):369-374.
    PMID: 28504848 DOI: 10.1111/edt.12349
    BACKGROUND/AIMS: The association of traumatic head injury (THI) with maxillofacial fractures (MFF) is a major health concern worldwide. In spite of the close anatomical proximity of maxillofacial bones to the cranium, the association of THI with MFF is controversial. The aim of this study was to assess the association between THI and MFF. Other factors associated with THI in patients with MFF were also investigated.

    MATERIALS AND METHODS: A hospital-based retrospective study was conducted at the OMFS Unit, Hospital USM, Kelantan, Malaysia. From 12 June 2013 to 31 December 2015, 473 patient records with MFF were reviewed to evaluate the association of THI and MFF.

    RESULTS: A total of 331 patients (69.98%) presented with concomitant THI. The most common associated THI were cranial bone fractures (68.6%) followed by intracranial injuries and concussion. A significant association existed between the Glasgow coma scale (GCS) score and the presence of THI concomitant MFF with P-value

    MeSH terms: Adolescent; Adult; Aged; Aged, 80 and over; Child; Child, Preschool; Female; Craniocerebral Trauma/etiology; Craniocerebral Trauma/epidemiology*; Humans; Infant; Malaysia/epidemiology; Male; Maxillofacial Injuries/etiology; Maxillofacial Injuries/epidemiology*; Middle Aged; Retrospective Studies; Risk Factors; Skull Fractures/etiology; Skull Fractures/epidemiology*; Glasgow Coma Scale; Prevalence
  9. Sharif Nia H, Pahlevan Sharif S, Lehto RH, Boyle C, Yaghoobzadeh A, Kaveh O, et al.
    Jpn J Clin Oncol, 2017 Aug 01;47(8):713-719.
    PMID: 28505271 DOI: 10.1093/jjco/hyx065
    Objective: The surfacing of thoughts and depressive affect associated with the prospect of death are prevalent among patients with advanced cancer. Because death cognitions and associated negative affect occur along an adaptive-less adaptive continuum, it is essential that valid and reliable instruments are available to measure death depression. The present study aimed to determine the psychometric properties of the Death Depression Scale among Iranian patients with advanced cancer.

    Methods: About 497 cancer patients completed a Persian version of the 21-item Death Depression Scale-Revised. The face, content and construct validity of the scale were ascertained. Reliability was also assessed using internal consistency, construct reliability and intra-class correlation coefficient (ICC).

    Results: Construct validity determined one factor with an eigenvalue greater than 1. The model had a good fit (χ2 (179, N = 248) = 520.345, P < 0.001; χ2/df = 2.907, CFI = 0.916, TLI = 0.902, IFI = 0.917, SRMR = 0.049 and RMSEA = 0.088 (90% confidence interval = 0.079-0.097)) with all factors loadings greater than 0.5 and statistically significant. The internal consistency, construct reliability and ICC were greater than 0.70. Convergent validity of the scale was demonstrated.

    Conclusions: Findings revealed that the Persian version of the Death Depression Scale-Revised is valid and reliable, and may be used to assess and evaluate death depression in Iranian patients with advanced cancer.

    MeSH terms: Cross-Cultural Comparison*; Depression/psychology*; Female; Humans; Male; Middle Aged; Psychometrics/methods*; Surveys and Questionnaires
  10. Takaoka H, Srisuka W, Saeung A
    J Med Entomol, 2017 09 01;54(5):1213-1223.
    PMID: 28505301 DOI: 10.1093/jme/tjx080
    Two new species of black flies, Simulium (Simulium) srisukai and S. (S.) kiewmaepanense, are described from specimens collected in Thailand. Both species are assigned to the Simulium variegatum species-group of the subgenus Simulium (Simulium) Latreille. They are characterized by the darkened female femora and tibiae and six inflated pupal gill filaments, and the darkened female tibiae and six ordinary thread-like pupal gill filaments, respectively. Taxonomic notes are given to separate these new species from 10 related species among the group. These new species represent the third and fourth species of the S. variegatum species-group from Thailand.
    MeSH terms: Animals; Female; Larva/anatomy & histology; Male; Pupa/anatomy & histology; Simuliidae/anatomy & histology*; Simuliidae/classification*; Thailand; Biodiversity
  11. Basu Baul TS, Dutta D, Duthie A, Prasad R, Rana NK, Koch B, et al.
    J Inorg Biochem, 2017 08;173:79-92.
    PMID: 28505480 DOI: 10.1016/j.jinorgbio.2017.04.020
    The cytotoxic potency of a series of triphenyltin(IV) compounds of general composition [Ph3Sn(Ln)] (1-6) has been probed in vitro employing MDA-MB-231 (human breast cancer) and HeLa (human cervical cancer) cell lines, where Ln=L1-3; isomeric 2/3/4-{(E)-2-[4-(dimethylamino)phenyl]diazenyl}benzoates and L4-6are their corresponding isoelectronic imino analogues 2/3/4-[(E)-{[4-(dimethylamino)phenyl]methylidene}amino]benzoates. Compounds 1-6 have been characterized by elemental analysis and their spectroscopic properties were studied using IR and NMR (1H,13C,119Sn) techniques. The molecular structures of a pro-ligand 2-[(E)-{[4-(dimethylamino)phenyl]methylidene}amino]benzoic acid (HL4) and two representative molecules, Ph3Sn(L2) 2 and Ph3Sn(L5) 5, have been determined by X-ray crystallography. Structural analyses of 2 and 5 revealed distorted tetrahedral geometries within C3O donor sets owing to monodentate modes of coordination of the respective carboxylate ligands, close intramolecular Sn…O(carbonyl) interactions notwithstanding. Cytotoxic studies in vitro in MDA-MB-231 and HeLa cell lines revealed high activity, in sub-micromolar range, for all investigated compounds. Among these, 1 and 3 exhibited potent cytotoxicity most effectively towards MDA-MB-231 cells with a IC50value of 1.19 and 1.44μM, respectively, whereas 5 showed remarkable activity towards HeLa cells with a IC50value of 0.88μM, yet the series of compounds had minimal cytotoxic effect on normal HEK 293 (human embryonic kidney) cell line. The underlying investigation suggested that the compounds exert potent antitumor effect by elevating intracellular reactive oxygen species generation and cause delay in cell cycle by inhibiting cells at G2/M phase. The results presented herein suggest further development of this class of triphenyltin(IV) compounds-based drugs as potential anti-cancer therapies should be pursued.
    MeSH terms: Antineoplastic Agents/pharmacology; Antineoplastic Agents/chemistry; Benzoates/pharmacology*; Benzoates/chemistry*; Cell Survival/drug effects; Drug Screening Assays, Antitumor; HeLa Cells; Humans; Organotin Compounds/pharmacology*; Organotin Compounds/chemistry*; Molecular Structure; Apoptosis/drug effects; Reactive Oxygen Species/metabolism*; Crystallography, X-Ray; Cell Line, Tumor; HEK293 Cells
  12. Baharudin MS, Taha M, Imran S, Ismail NH, Rahim F, Javid MT, et al.
    Bioorg Chem, 2017 06;72:323-332.
    PMID: 28505547 DOI: 10.1016/j.bioorg.2017.05.005
    Natural products are the main source of motivation to design and synthesize new molecules for drug development. Designing new molecules against β-glucuronidase inhibitory is utmost essential. In this study indole analogs (1-35) were synthesized, characterized using various spectroscopic techniques including 1H NMR and EI-MS and evaluated for their β-glucuronidase inhibitory activity. Most compounds were identified as potent inhibitors for the enzyme with IC50 values ranging between 0.50 and 53.40μM, with reference to standard d-saccharic acid 1,4-lactone (IC50=48.4±1.25μM). Structure-activity relationship had been also established. The results obtained from docking studies for the most active compound 10 showed that hydrogen bond donor features as well as hydrogen bonding with (Oε1) of nucleophilic residue Glu540 is believed to be the most importance interaction in the inhibition activity. It was also observed that hydroxyl at fourth position of benzylidene ring acts as a hydrogen bond donor and interacts with hydroxyl (OH) on the side chain of catalysis residue Tyr508. The enzyme-ligand complexed were being stabilized through electrostatic π-anion interaction with acid-base catalyst Glu451 (3.96Å) and thus preventing Glu451 from functioning as proton donor residue.
    MeSH terms: Dose-Response Relationship, Drug; Glucuronidase/antagonists & inhibitors*; Glucuronidase/metabolism; Glycoproteins/chemical synthesis; Glycoproteins/pharmacology*; Glycoproteins/chemistry; Humans; Indoles/chemical synthesis; Indoles/pharmacology*; Indoles/chemistry; Structure-Activity Relationship; Molecular Structure
  13. Teh AHT, Lee SM, Dykes GA
    BMC Res Notes, 2017 May 12;10(1):182.
    PMID: 28499399 DOI: 10.1186/s13104-017-2504-1
    BACKGROUND: Biofilm formation has been suggested to play a role in the survival of Campylobacter jejuni in the environment and contribute to the high incidence of human campylobacteriosis. Molecular studies of biofilm formation by Campylobacter are sparse.

    RESULTS: We attempted to identify genes that may be involved in biofilm formation in seven C. jejuni strains through construction of mutants using the EZ-Tn5 Transposome system. Only 14 mutants with reduced biofilm formation were obtained, all from one strain of C. jejuni. Three different genes of interest, namely CmeB (synthesis of multidrug efflux system transporter proteins), NusG (transcription termination and anti-termination protein) and a putative transmembrane protein (involved in membrane protein function) were identified. The efficiency of the EZ::TN5 transposon mutagenesis approach was strain dependent and was unable to generate any mutants from most of the strains used.

    CONCLUSIONS: A diverse range of genes may be involved in biofilm formation by C. jejuni. The application of the EZ::TN5 system for construction of mutants in different Campylobacter strains is limited.

    MeSH terms: Bacterial Proteins/genetics; DNA Transposable Elements/genetics*; Genes, Bacterial/genetics*; Mutation; Species Specificity; Campylobacter jejuni/classification; Campylobacter jejuni/genetics*; Campylobacter jejuni/physiology*; Mutagenesis, Insertional/methods*; Biofilms*
  14. Mamat NA, See HH
    J Chromatogr A, 2017 Jun 30;1504:9-16.
    PMID: 28499598 DOI: 10.1016/j.chroma.2017.05.005
    A new electric-field driven extraction approach based on the integration of a bubbleless electrode into the electromembrane extraction (EME) across hollow polymer inclusion membranes (HPIMs) was demonstrated for the first time. The bubbleless electrode was prepared based on an in-situ synthesised polyacrylamide within a fused silica capillary. The electrode functions as a salt bridge, which conducts the electrical current between the acceptor phase in the lumen of the HPIM and the acceptor solution in the reservoir connected to a high voltage supply through a platinum electrode. Two types of HPIMs were employed, which consisted of desired proportions of cellulose acetate as base polymer, tris(2-ethylhexyl)phosphate as plasticizer, and di-(2-ethylhexyl)phosphoric acid as anionic carrier or Aliquat 336 as cationic carrier, respectively. The EME strategy was evaluated for the simultaneous determination of cationic quaternary ammonium and anionic chlorophenoxy acetic acid herbicides present in the river water, respectively. The analysis was carried out using capillary electrophoresis coupled with UV and contactless conductivity detection. Under the optimised conditions, enrichment factors in the range of 152-185-fold were obtained from 4mL of river water sample with a 20min extraction time and an applied voltage of 3000V. The proposed method provided good linearity with correlation coefficients ranging from 0.9982 to 0.9997 over a concentration range of 1-1000μg/L. The detection limits of the method for the herbicides were in the range of 0.3-0.4μg/L, with relative standard deviations of between 4.8% and 8.5%. The relative recoveries obtained when analysing the spiked river water ranged from 99.1% to 100%. A comparison was also made between the newly developed approach with the conventional EME setup by placing the platinum electrode directly in the lumen of the HPIMs.
    MeSH terms: Electrodes; Fresh Water/chemistry; Herbicides/isolation & purification*; Herbicides/chemistry; Membranes, Artificial; Polymers/chemistry*; Water Pollutants, Chemical/isolation & purification*; Water Pollutants, Chemical/chemistry; Electrophoresis, Capillary; Electrochemical Techniques/instrumentation; Electrochemical Techniques/methods*
  15. Seltmann A, Corman VM, Rasche A, Drosten C, Czirják GÁ, Bernard H, et al.
    Ecohealth, 2017 06;14(2):272-284.
    PMID: 28500421 DOI: 10.1007/s10393-017-1245-x
    Emerging infectious diseases (EIDs) are considered a major threat to global health. Most EIDs appear to result from increased contact between wildlife and humans, especially when humans encroach into formerly pristine habitats. Habitat deterioration may also negatively affect the physiology and health of wildlife species, which may eventually lead to a higher susceptibility to infectious agents and/or increased shedding of the pathogens causing EIDs. Bats are known to host viruses closely related to important EIDs. Here, we tested in a paleotropical forest with ongoing logging and fragmentation, whether habitat disturbance influences the occurrence of astro- and coronaviruses in eight bat species. In contrast to our hypothesis, anthropogenic habitat disturbance was not associated with corona- and astrovirus detection rates in fecal samples. However, we found that bats infected with either astro- or coronaviruses were likely to be coinfected with the respective other virus. Additionally, we identified two more risk factors influencing astrovirus shedding. First, the detection rate of astroviruses was higher at the beginning of the rainy compared to the dry season. Second, there was a trend that individuals with a poor body condition had a higher probability of shedding astroviruses in their feces. The identification of risk factors for increased viral shedding that may potentially result in increased interspecies transmission is important to prevent viral spillovers from bats to other animals, including humans.
    MeSH terms: Animals; Chiroptera/virology*; Phylogeny; Seasons; Virus Shedding*; Coronavirus*; Astroviridae*; Forests
  16. Kunjirama M, Saman N, Johari K, Song ST, Kong H, Cheu SC, et al.
    Environ Sci Pollut Res Int, 2017 Jun;24(17):15167-15181.
    PMID: 28500549 DOI: 10.1007/s11356-017-9117-z
    This study was conducted to investigate the potential application of oil palm empty fruit branches (OPEFB) as adsorbents to remove organic methylmercurry, MeHg(II), and inorganic Hg(II) from aqueous solution. The OPEFB was functionalized with amine containing ligand namely 3-ureidopropyltriethoxysilane (UPTES) aiming for better adsorption performance towards both mercury ions. The adsorption was found to be dependent on initial pH, initial concentraton, temperatures, and contact time. The maximum adsorption capacities (Qm.exp) of Hg(II) adsorption onto OPEFB and UPTES-OPEFB were 0.226 and 0.773 mmol/g, respectively. The Qm.exp of MeHg(II) onto OPEFB, however, was higher than UPTES-OPEFB. The adsorption kinetic data obeyed the Elovich model and the adsorption was controlled by the film-diffusion step. The calculated thermodynamic parameters indicate an endothermic adsorption process. Adsorption data analysis indicates that the adsorption mechanism may include ion-exchange, complexation, and physisorption interactions. The potential applications of adsorbents were demonstrated using oilfield produced water and natural gas condensate. The UPTES-OPEFB offered higher selectivity towards both mercury ions than OPEFB. The regenerability studies indicated that the adsorbent could be reused for multiple cycles.
    MeSH terms: Adsorption; Fruit*; Hydrogen-Ion Concentration; Ions; Kinetics; Mercury/chemistry*; Arecaceae
  17. Nadzir MSM, Lin CY, Khan MF, Latif MT, Dominick D, Hamid HHA, et al.
    Environ Sci Pollut Res Int, 2017 Jun;24(18):15278-15290.
    PMID: 28500553 DOI: 10.1007/s11356-017-9131-1
    Open biomass burning in Peninsula Malaysia, Sumatra, and parts of the Indochinese region is a major source of transboundary haze pollution in the Southeast Asia. To study the influence of haze on rainwater chemistry, a short-term investigation was carried out during the occurrence of a severe haze episode from March to April 2014. Rainwater samples were collected after a prolonged drought and analyzed for heavy metals and major ion concentrations using inductively coupled plasma mass spectroscopy (ICP-MS) and ion chromatography (IC), respectively. The chemical composition and morphology of the solid particulates suspended in rainwater were examined using a scanning electron microscope coupled with energy-dispersive X-ray spectroscopy (SEM-EDS). The dataset was further interpreted using enrichment factors (EF), statistical analysis, and a back trajectory (BT) model to find the possible sources of the particulates and pollutants. The results show a drop in rainwater pH from near neutral (pH 6.54) to acidic (
    MeSH terms: Air Movements; Air Pollutants*; Asia, Southeastern; China; Environmental Monitoring; Hydrogen-Ion Concentration; Indonesia; Rain/chemistry*
  18. Choudhury D, Vrbka M, Mamat AB, Stavness I, Roy CK, Mootanah R, et al.
    J Mech Behav Biomed Mater, 2017 08;72:192-199.
    PMID: 28500998 DOI: 10.1016/j.jmbbm.2017.05.011
    Coefficient of friction (COF) tests were conducted on 28-mm and 36-mm-diameter hip joint prostheses for four different material combinations, with or without the presence of Ultra High Molecular Weight Polyethylene (UHMWPE) particles using a novel pendulum hip simulator. The effects of three micro dimpled arrays on femoral head against a polyethylene and a metallic cup were also investigated. Clearance played a vital role in the COF of ceramic on polyethylene and ceramic on ceramic artificial hip joints. Micro dimpled metallic femoral heads yielded higher COF against a polyethylene cup; however, with metal on metal prostheses the dimpled arrays significantly reduced the COF. In situ images revealed evidence that the dimple arrays enhanced film formation, which was the main mechanism that contributed to reduced friction.
    MeSH terms: Bone-Implant Interface; Ceramics/analysis*; Hip Joint; Hip Prosthesis*; Humans; Materials Testing*; Polyethylenes/analysis*; Friction*; Metal-on-Metal Joint Prostheses
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