Browse publications by year: 2018

  1. Lip HTC, Huei TJ, Hamid SRBGS, Vendargon SJ
    Saudi J Anaesth, 2018 8 14;12(3):462-464.
    PMID: 30100848 DOI: 10.4103/sja.SJA_674_17
    The prevalence of pulmonary artery catheter (PAC) entrapment in open-heart surgery is scarce with a prevalence rate of 0.065%. Challenges in managing such cases lie particularly in choosing the modalities (chest roentgenogram, fluoroscopy, and transesophageal echocardiography) to accurately identify the anatomic location and cause of entrapment. In this case, we report a 42-year-old man who underwent mitral valve replacement with PAC entrapment discovered on postoperative day 2 and subsequently underwent retrieval after re-sternotomy. This case also highlights the usefulness of transesophageal echocardiography by the cardiac anesthetist in aiding the surgeons to locate the anatomic location where the catheter was entrapped.
  2. Agatonovic-Kustrin S, Morton DW
    MethodsX, 2018;5:797-802.
    PMID: 30101083 DOI: 10.1016/j.mex.2018.07.013
    A high-performance thin-layer chromatography (HPTLC) method was developed for quantification of α-amylase inhibitory activity and stigmasterol content in ant plant extracts. An improved HPTLC method for the determination of total free radical scavenging activity in samples using DPPH• is also reported. For quantification of α-amylase inhibitory activity, the developed HPTLC plate is dipped into an α-amylase solution, and the bioautogram is then incubated at 25 °C for 30 min under humid conditions. For visualization of enzyme inhibitory activity, the starch test with an iodine indicator solution is used. The blue zone observed comes from the starch-iodine complex formed from starch that was not hydrolyzed by the amylase due to enzyme inhibition by the compound(s) present in the sample. The area of the blue zones was used to compare and quantify relative α-amylase inhibitory activity in different extracts. Location of the blue zones (hRF) on the plate was used to detect compounds that are responsible for the α-amylase inhibitory activity. Relative α-amylase activity was not related to the antioxidant activity, but was highly correlated with the stigmasterol content in the sample extracts (R = 0.95). Therefore, plant sterols present in the extracts might be responsible for α-amylase inhibitory activities in the extracts. •The developed method for quantification of α-amylase inhibitory activity provides an efficient and effective tool that can be used to screen, detect and quantify α-amylase inhibitory activity in plant extracts.•The proposed protocol is easy to run, involves minimal sample preparation, with multiple samples able to be analyzed in parallel on the same chromatographic plate, in a short time.•There were significant differences in α-amylase inhibitory activity, stigmasterol content, and total free radical scavenging activity between methanol, ethanol, dichloromethane, and ethyl acetate ant plant extracts.
  3. Kakkar S, Tahlan S, Lim SM, Ramasamy K, Mani V, Shah SAA, et al.
    Chem Cent J, 2018 Aug 12;12(1):92.
    PMID: 30101384 DOI: 10.1186/s13065-018-0459-5
    BACKGROUND: A new series of benzoxazole analogues was synthesized and checked for their in vitro antibacterial, antifungal and anticancer activities.

    RESULTS AND DISCUSSION: The synthesized benzoxazole compounds were confirmed by IR, 1H/13C-NMR, mass and screened for their in vitro antimicrobial activity against Gram-positive bacterium: Bacillus subtilis, four Gram-negative bacteria: Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, Salmonella typhi and two fungal strains: Candida albicans and Aspergillus niger using tube dilution technique and minimum inhibitory concentration (MIC) was noted in µM and compared to ofloxacin and fluconazole. Human colorectal carcinoma (HCT116) cancer cell line was used for the determination of in vitro anticancer activity (IC50 value) by Sulforhodamine B assay using 5-fluorouracil as standard drug.

    CONCLUSION: The performed study indicated that the compounds 1, 10, 13, 16, 19, 20 and 24 had highest antimicrobial activity with MIC values comparable to ofloxacin and fluconazole and compounds 4, 6, 25 and 26 had best anticancer activity in comparison to 5-fluorouracil.

  4. Puah SM, Tan JAMA, Chew CH, Chua KH
    J Food Sci, 2018 Sep;83(9):2337-2342.
    PMID: 30101982 DOI: 10.1111/1750-3841.14300
    Staphylococcus aureus is able to form multilayer biofilms embedded within a glycocalyx or slime layer. Biofilm formation poses food contamination risks and can subsequently increase the risk of food poisoning. Identification of food-related S. aureus strains will provide additional data on staphylococcal food poisoning involved in biofilm formation. A total of 52 S. aureus strains isolated from sushi and sashimi was investigated to study their ability for biofilm formation using crystal violet staining. The presence of accessory gene regulator (agr) groups and 15 adhesion genes was screened and their associations in biofilm formation were studied. All 52 S. aureus strains showed biofilm production on the tested hydrophobic surface with 44% (23/52) strains classified as strong, 33% (17/52) as moderate, and 23% (12/52) as weak biofilm producers. The frequency of agr-positive strains was 71% (agr group 1 = 21 strains; agr group 2 = 2 strains; agr group 3 = 12 strains; agr group 4 = 2 strains) whereas agr-negative strains were 29% (15/52). Twelve adhesion genes were detected and 98% of the S. aureus strains carried at least one adhesion gene. The ebps was significantly (p < .05) associated with strong biofilm producing strains. In addition, eno, clfA, icaAD, sasG, fnbB, cna, and sasC were significantly higher in the agr-positive group compared to the agr-negative group. The results of this study suggest that the presence of ebps, eno, clfA, icaAD, sasG, fnbB, cna, and sasC may play an important role in enhancing the stage of biofilm-related infections and warrants further investigation.

    PRACTICAL APPLICATION: This work contributes to the knowledge on the biofilm formation and the distribution of agr groups in S. aureus strains as well as microbial surface components in recognizing adherence matrix molecules of organisms isolated from ready-to-eat sushi and sashimi. The findings provide valuable information to further study the roles of specific genes in causing biofilm-related infections.

    MeSH terms: Animals; Bacterial Proteins/genetics*; Fishes/microbiology; Food Microbiology*; Foodborne Diseases/microbiology; Genes, Bacterial*; Humans; Staphylococcal Infections/microbiology*; Staphylococcus aureus/genetics*; Staphylococcus aureus/isolation & purification; Staphylococcus aureus/pathogenicity; Seafood/microbiology*; Biofilms*
  5. Loganathan K, Moriya S, Parhar IS
    Zebrafish, 2018 10;15(5):473-483.
    PMID: 30102584 DOI: 10.1089/zeb.2018.1594
    Ambient light and temperature affect reproductive function by regulating kisspeptin and gonadotrophin-releasing hormone (GnRH) in vertebrates. Melatonin and melatonin receptors, as well as the two-pore domain K+ channel-related K+ (TREK) channels, are affected by light and/or temperature; therefore, these molecules could modulate kisspeptin and GnRH against ambient light and temperature. In this study, we investigated the effect of light and temperature, which affect melatonin levels in gene expression levels of TREK channels, kisspeptin, and GnRH. We first investigated the effects of different light and temperature conditions on brain melatonin concentrations by ELISA. Fish were exposed to either constant darkness, constant light, high temperature (35°C), or low temperature (20°C) for 72 h. Brain melatonin levels were significantly high under constant darkness and high temperature. We further investigated the effects of high brain melatonin levels by constant darkness and high temperature on gene expression levels of melatonin receptors (mt1, mt2, and mel1c), TREK channels (trek1b, trek2a, and trek2b), gnrh3, and kiss2 in the adult zebrafish brain by real-time polymerase chain reaction. Fish were exposed to constant darkness or elevated temperatures (35°C) for 72 h. trek2a, kiss2, and gnrh3 levels were increased under constant darkness. High temperature decreased gene expression levels of mt1, mt2, mel1c, and gnrh3 in the preoptic area, whereas other genes remained unchanged. Melatonin receptors, TREK channels, gnrh3, and kiss2 responded differently under high melatonin conditions. The melatonin receptors and the TREK channels could play roles in the regulation of reproduction by environmental cues, especially ambient light and temperature.
    MeSH terms: Animals; Antioxidants/pharmacology; Brain/drug effects; Brain/metabolism*; Circadian Rhythm; Darkness; Gene Expression Regulation/drug effects*; Hot Temperature; Gonadotropin-Releasing Hormone/genetics; Gonadotropin-Releasing Hormone/metabolism; Melatonin/pharmacology*; Reproduction; Zebrafish/metabolism*; Zebrafish/physiology; Potassium Channels/genetics; Potassium Channels/metabolism*; Zebrafish Proteins/genetics; Zebrafish Proteins/metabolism*; Receptor, Melatonin, MT1/genetics; Receptor, Melatonin, MT1/metabolism*; Kisspeptins/genetics; Kisspeptins/metabolism
  6. Baker EJ, Yusof MH, Yaqoob P, Miles EA, Calder PC
    Mol Aspects Med, 2018 12;64:169-181.
    PMID: 30102930 DOI: 10.1016/j.mam.2018.08.002
    Endothelial cells (ECs) play a role in the optimal function of blood vessels. When endothelial function becomes dysregulated, the risk of developing atherosclerosis increases. Specifically, upregulation of adhesion molecule expression on ECs promotes the movement of leukocytes, particularly monocytes, into the vessel wall. Here, monocytes differentiate into macrophages and may become foam cells, contributing to the initiation and progression of an atherosclerotic plaque. The ability of omega-3 (n-3) polyunsaturated fatty acids (PUFAs) to influence the expression of adhesion molecules by ECs and to modulate leukocyte-endothelial adhesion has been studied in cell culture using various types of ECs, in animal feeding studies and in human trials; the latter have tended to evaluate soluble forms of adhesion molecules that circulate in the bloodstream. These studies indicate that n-3 PUFAs (both eicosapentaenoic acid and docosahexaenoic acid) can decrease the expression of key adhesion molecules, such as vascular cell adhesion molecule 1, by ECs and that this results in decreased adhesive interactions between leukocytes and ECs. These findings suggest that n-3 PUFAs may lower leukocyte infiltration into the vascular wall, which could contribute to reduced atherosclerosis and lowered risk of cardiovascular disease.
    MeSH terms: Adhesives; Animals; Docosahexaenoic Acids; Foam Cells; Humans; Leukocytes; Monocytes; Eicosapentaenoic Acid; Fatty Acids, Omega-3; Cell Adhesion Molecules; Up-Regulation; Vascular Cell Adhesion Molecule-1; Endothelial Cells; Atherosclerosis; Plaque, Atherosclerotic
  7. Mazlan SNHS, Ali MSM, Rahman RNZRA, Sabri S, Jonet MA, Leow TC
    Int J Biol Macromol, 2018 Nov;119:1188-1194.
    PMID: 30102982 DOI: 10.1016/j.ijbiomac.2018.08.022
    GDSL esterase J15 (EstJ15) is a member of Family II of lipolytic enzyme. The enzyme was further classified in subgroup SGNH hydrolase due to the presence of highly conserve motif, Ser-Gly-Asn-His in four conserved blocks I, II, III, and V, respectively. X-ray quality crystal of EstJ15 was obtained from optimized formulation containing 0.10 M ammonium sulphate, 0.15 M sodium cacodylate trihydrate pH 6.5, and 20% PEG 8000. The crystal structure of EstJ15 was solved at 1.38 Å with one molecule per asymmetric unit. The structure exhibits α/β hydrolase fold and shared low amino acid sequence identity of 23% with the passenger domain of the autotransporter EstA of Pseudomonas aeruginosa. The active site is located at the centre of the structure, formed a narrow tunnel that hinder long substrates to be catalysed which was proven by the protein-ligand docking analysis. This study facilitates the understanding of high substrate specificity of EstJ15 and provide insights on its catalytic mechanism.
    MeSH terms: Crystallization; Esterases/metabolism; Esterases/chemistry*; Models, Molecular; Photobacterium/enzymology*; Catalytic Domain
  8. Marin-Mogollon C, van Pul FJA, Miyazaki S, Imai T, Ramesar J, Salman AM, et al.
    Malar J, 2018 Aug 09;17(1):288.
    PMID: 30092798 DOI: 10.1186/s12936-018-2431-1
    BACKGROUND: Rodent malaria parasites where the gene encoding circumsporozoite protein (CSP) has been replaced with csp genes from the human malaria parasites, Plasmodium falciparum or Plasmodium vivax, are used as pre-clinical tools to evaluate CSP vaccines in vivo. These chimeric rodent parasites produce sporozoites in Anopheles stephensi mosquitoes that are capable of infecting rodent and human hepatocytes. The availability of chimeric P. falciparum parasites where the pfcsp gene has been replaced by the pvcsp would open up possibilities to test P. vivax CSP vaccines in small scale clinical trials using controlled human malaria infection studies.

    METHODS: Using CRISPR/Cas9 gene editing two chimeric P. falciparum parasites, were generated, where the pfcsp gene has been replaced by either one of the two major pvcsp alleles, VK210 or VK247. In addition, a P. falciparum parasite line that lacks CSP expression was also generated. These parasite lines have been analysed for sporozoite production in An. stephensi mosquitoes.

    RESULTS: The two chimeric Pf-PvCSP lines exhibit normal asexual and sexual blood stage development in vitro and produce sporozoite-containing oocysts in An. stephensi mosquitoes. Expression of the corresponding PvCSP was confirmed in oocyst-derived Pf-PvCSP sporozoites. However, most oocysts degenerate before sporozoite formation and sporozoites were not found in either the mosquito haemocoel or salivary glands. Unlike the chimeric Pf-PvCSP parasites, oocysts of P. falciparum parasites lacking CSP expression do not produce sporozoites.

    CONCLUSIONS: Chimeric P. falciparum parasites expressing P. vivax circumsporozoite protein fail to produce salivary gland sporozoites. Combined, these studies show that while PvCSP can partially complement the function of PfCSP, species-specific features of CSP govern full sporozoite maturation and development in the two human malaria parasites.

    MeSH terms: Animals; Anopheles/parasitology*; Chimera/genetics*; Plasmodium falciparum/genetics*; Plasmodium vivax/genetics; Salivary Glands/parasitology; Protozoan Proteins/genetics*; Protozoan Proteins/metabolism; Gene Expression; Sporozoites/physiology*
  9. Borgquist S, Rosendahl AH, Czene K, Bhoo-Pathy N, Dorkhan M, Hall P, et al.
    Breast Cancer Res, 2018 08 09;20(1):93.
    PMID: 30092829 DOI: 10.1186/s13058-018-1026-7
    BACKGROUND: Long-term insulin exposure has been implicated in breast cancer etiology, but epidemiological evidence remains inconclusive. The aims of this study were to investigate the association of insulin therapy with mammographic density (MD) as an intermediate phenotype for breast cancer and to assess associations with long-term elevated circulating insulin levels using a genetic score comprising 18 insulin-associated variants.

    METHODS: We used data from the KARolinska MAmmography (Karma) project, a Swedish mammography screening cohort. Insulin-treated patients with type 1 (T1D, n = 122) and type 2 (T2D, n = 237) diabetes were identified through linkage with the Prescribed Drug Register and age-matched to 1771 women without diabetes. We assessed associations with treatment duration and insulin glargine use, and we further examined MD differences using non-insulin-treated T2D patients as an active comparator. MD was measured using a fully automated volumetric method, and analyses were adjusted for multiple potential confounders. Associations with the insulin genetic score were assessed in 9437 study participants without diabetes.

    RESULTS: Compared with age-matched women without diabetes, insulin-treated T1D patients had greater percent dense (8.7% vs. 11.4%) and absolute dense volumes (59.7 vs. 64.7 cm3), and a smaller absolute nondense volume (615 vs. 491 cm3). Similar associations were observed for insulin-treated T2D, and estimates were not materially different in analyses comparing insulin-treated T2D patients with T2D patients receiving noninsulin glucose-lowering medication. In both T1D and T2D, the magnitude of the association with the absolute dense volume was highest for long-term insulin therapy (≥ 5 years) and the long-acting insulin analog glargine. No consistent evidence of differential associations by insulin treatment duration or type was found for percent dense and absolute nondense volumes. Genetically predicted insulin levels were positively associated with percent dense and absolute dense volumes, but not with the absolute nondense volume (percentage difference [95% CI] per 1-SD increase in insulin genetic score = 0.8 [0.0; 1.6], 0.9 [0.1; 1.8], and 0.1 [- 0.8; 0.9], respectively).

    CONCLUSIONS: The consistency in direction of association for insulin treatment and the insulin genetic score with the absolute dense volume suggest a causal influence of long-term increased insulin exposure on mammographic dense breast tissue.

    MeSH terms: Insulin Glargine/adverse effects*; Adult; Aged; Breast/drug effects; Breast/pathology; Breast Neoplasms/prevention & control; Diabetes Mellitus, Type 1/blood; Diabetes Mellitus, Type 1/drug therapy*; Diabetes Mellitus, Type 2/blood; Diabetes Mellitus, Type 2/drug therapy*; Female; Humans; Hypoglycemic Agents/adverse effects*; Insulin/blood; Insulin/genetics*; Mammography; Middle Aged; Phenotype; Prospective Studies; Risk Factors; Sweden; Time Factors; Case-Control Studies; Genetic Predisposition to Disease; Polymorphism, Single Nucleotide; Genetic Association Studies; Breast Density/drug effects*
  10. Abd-Elhay FA, Elhusseiny KM, Kamel MG, Low SK, Sang TK, Mehyar GM, et al.
    Clin Breast Cancer, 2018 12;18(6):e1293-e1310.
    PMID: 30093263 DOI: 10.1016/j.clbc.2018.07.003
    BACKGROUND: Male breast cancer (MBC) is usually diagnosed at late stages and therefore has a worse prognosis than female breast cancer (FBC). MBC is also more likely to have lymph node (LN) involvement than FBC.

    MATERIALS AND METHODS: We sought to determine the prognostic role of the examined lymph node (LN), negative LN (NLN), and positive LN counts and the LN ratio (LNR), defined as (positive LNs/ENLs), on the survival rate among MBC patients. We performed a large population-based study using the data from the Surveillance, Epidemiology, and End Results program.

    RESULTS: Older age, black race, stage IV disease, ≤ 1 NLN, and a > 31.3% LNR were significantly associated with worse survival across all prediction models. Moreover, we demonstrated a decreased risk of mortality in MBC patients across the MBC-specific survival model (hazard ratio, 0.98; 95% confidence interval, 0.96-0.998; P = .03) and 10-year MBC-specific survival model (hazard ratio, 0.98; 95% confidence interval, 0.96-0.999; P = .04).

    CONCLUSION: MBC has had an augmented incidence over the years. We found several independent predictors of MBC survival, including age, race, stage, NLNs, and the LNR. We strongly suggest adding the NLN count and/or LNR into the current staging system. Further studies are needed to provide information on the mechanisms underlying the association between the NLN count and MBC survival and the LNR and MBC survival.

    MeSH terms: Follow-Up Studies; Humans; Lymph Node Excision/mortality*; Lymph Nodes/pathology*; Lymph Nodes/surgery; Male; Middle Aged; Prognosis; Survival Rate; SEER Program; Breast Neoplasms, Male/mortality*; Breast Neoplasms, Male/pathology; Breast Neoplasms, Male/surgery
  11. Thong MK, See-Toh Y, Hassan J, Ali J
    Genet Med, 2018 10;20(10):1114-1121.
    PMID: 30093710 DOI: 10.1038/s41436-018-0135-0
    Advances in genetic and genomic technology changed health-care services rapidly in low and middle income countries (LMICs) in the Asia-Pacific region. While genetic services were initially focused on population-based disease prevention strategies, they have evolved into clinic-based and therapeutics-oriented service. Many LMICs struggled with these noncommunicable diseases and were unprepared for the needs of a clinical genetic service. The emergence of a middle class population, the lack of regulatory oversight, and weak capacity-building in medical genetics expertise and genetic counseling services led to a range of genetic services of variable quality with minimal ethical oversight. Some of the current shortcomings faced include the lack of awareness of cultural values in genetic health care, the variable stages of socioeconomic development and educational background that led to increased demand and abuse of genetics, the role of women in society and the crisis of gender selection, the lack of preventive and care services for genetic and birth defects, the issues of gene ethics in medicine, and the lack of understanding of some religious controversies. These challenges provide opportunities for both developing and developed nations to work together to reduce the inequalities and to ensure a caring, inclusive, ethical, and cost-effective genetic service in the region.
    MeSH terms: Asia; Delivery of Health Care; Developing Countries; Genetic Counseling/trends*; Genetics, Medical/trends*; Health Services Needs and Demand; Humans; Genetic Services/trends*
  12. Mukherjee S, Sharma M, Devgan A, Jatana SK
    Med J Armed Forces India, 2018 Jul;74(3):235-240.
    PMID: 30093766 DOI: 10.1016/j.mjafi.2017.07.003
    BACKGROUND: Iron deficiency anemia (IDA) in cyanotic congenital heart disease (CCHD) and its association with cyanotic spells has been documented in literature. However, Indian data especially in the pediatric age group is scarce. This study was conducted to find out the prevalence of IDA in this population.

    METHODS: An observational study was conducted in a tertiary care hospital. Children with CCHD in the age group of birth-12 years were included in the study. Hematological parameters of these patients were determined and compared. An assessment of the incidence of cyanotic spells in the iron-deficient and iron non-deficient children was also done. Data analysis was done using Fischer's exact test.

    RESULTS: The prevalence of IDA was 47.06% in the study population. The study also showed that hemoglobin and hematocrit levels were paradoxically higher in the iron-deficient group as compared to the non-deficient, though the iron studies revealed the iron deficiency. The incidence of cyanotic spells was higher in the iron-deficient group. The mean corpuscular volume (MCV), red cell distribution width (RDW), serum ferritin, serum iron, total iron binding capacity (TIBC), and transferrin saturation (TS) values were the parameters, which were found to be statistically significant to differentiate the study groups.

    CONCLUSION: The prevalence of IDA in children with CCHD was found to be high. Iron-deficient group had an increased frequency of cyanotic spells as compared to the non-deficient group, which was statistically significant.

  13. Verma RK, Paraidathathu T, Taha NA, Chong WW
    PMID: 30094032 DOI: 10.1186/s40545-018-0146-x
    Background: Obesity is now widely regarded as a main contributor to poor health. Involvement of community pharmacists can be a valuable tool in obesity management. However, there is still a lack of data in Malaysia on the potential involvement of and opportunities for community pharmacists in providing weight management services. Thus, it is essential to investigate the perceptions of the general public on weight management services in the community pharmacy setting. To evaluate the general public's perceptions on weight management services by community pharmacists in terms of perceived availability, utilization and factors influencing acceptability of services.

    Methods: A descriptive, cross sectional-survey was conducted using a self-administered questionnaire comprising of sections that focused on public preferences and options on weight management approaches, perceived availability of extended services and resources provided by community pharmacists in relation to weight management, utilization of these services and resources, and factors influencing acceptability of weight management services provided by community pharmacists. The questionnaires were distributed to the general public aged 18 years and above in Klang Valley, Malaysia.

    Results: A total of 730 respondents with a median age of 31 years participated in this study. Majority of respondents ranked dieticians as their preferred first line of consultation, with only about a quarter of respondents ranking community pharmacists as their preferred first or second line of consultation. Although more than half show of the study respondents perceived that community pharmacies they had visited offered services for measuring weight, height, blood pressure, blood glucose and blood cholesterol, fewer perceived that community pharmacies provided advice on physical activity and healthy eating to achieve weight loss. Additionally, majority of the respondents indicated that they had not utilized these services. However, most respondents perceived that community pharmacists should provide weight management services. The main factors influencing acceptability show of services included training of pharmacists, payment, waiting time and the issue of privacy.

    Conclusion: The findings of this study demonstrated that the majority of respondents were in support of weight management services in community pharmacy; however only a low percentage reported utilizing these services. Factors influencing acceptability of services included payment, waiting time and the issue of privacy. With adequate training among pharmacists and increased awareness of services among the public, community pharmacists could play a larger and important role in addressing the issue of obesity in Malaysia.

  14. Rajasuriar R, Hearps AC, Crowe SM, Anzinger JJ, Palmer CS
    Ann Transl Med, 2018 Jul;6(13):277.
    PMID: 30094263 DOI: 10.21037/atm.2018.06.20
    MeSH terms: HIV Infections
  15. Gul Y, Sultan Z, Jokhio GA
    Heliyon, 2018 Aug;4(8):e00715.
    PMID: 30094383 DOI: 10.1016/j.heliyon.2018.e00715
    It has been reported in the literature that the perception of crime at the neighbourhood level inversely affects the walking behaviour of individuals. On the other hand, the gated neighbourhoods are considered safe from crime, however, there is a lack of research on the association of the perception of crime and walking in gated neighbourhoods. Therefore, the objectives of the study reported in this paper were to investigate the association between the perception of crime and walking in gated and non-gated neighbourhoods. A questionnaire was used to collect the data on walking and the perception of crime in 16 neighbourhoods of Karachi Pakistan, 8 out of which were gated. Independent sample t-test and gamma tests were used for the data analysis. The results show that although there is a lower perception of crime in the gated neighbourhoods, yet the inhabitants of gated neighbourhoods engage in less physical activity comprising of walking. In spite of a greater perception of crime in non-gated neighbourhoods, higher values of walking were reported by the residents of those neighbourhoods. Therefore, it has been concluded that there does not exist a definite relationship between the perception of crime and walking behaviour at the neighbourhood level and the perceived safety from crime claimed by the proponents of the gated neighbourhoods does not encourage walking among the residents.
    MeSH terms: Crime; Humans; Pakistan; Perception; Surveys and Questionnaires; Residence Characteristics; Exercise; Walking
  16. Nor Hanipah Z, Schauer PR
    Obes Surg, 2018 10;28(10):3310-3311.
    PMID: 30094576 DOI: 10.1007/s11695-018-3457-8
    MeSH terms: Aged; Humans; Obesity, Morbid/surgery*; Bariatric Surgery*
  17. Martla M, Umsakul K, Sudesh K
    J Basic Microbiol, 2018 Nov;58(11):977-986.
    PMID: 30095175 DOI: 10.1002/jobm.201800279
    Polyhydroxyalkanoates (PHAs) has been paid great attention because of its useful thermoplastic properties and complete degradation in various natural environments. But, at industrial level, the successful commercialization of PHAs is limited by the high production cost due to the expensive carbon source and recovery processes. Pseudomonas mendocina PSU cultured for 72 h in mineral salts medium (MSM) containing 2% (v/v) biodiesel liquid waste (BLW) produced 79.7 wt% poly(3-hydroxybutyrate) (PHB) at 72 h. In addition, this strain produced 43.6 wt% poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) with 8.6 HV mol% at 60 h when added with 0.3% sodium propionate. The synthesized intracellular PHA granules were recovered and purified by the recently reported biological method using mealworms. The weight average molecular weight (Mw ) and number average molecular weight (Mn ) of the biologically extracted PHA were higher than that from the chloroform extraction with comparable melting temperature (Tm ) and high purity. This study has successfully established a low-cost process to synthesize PHAs from BLW and subsequently confirmed the ability of mealworms to extract PHAs from various kinds of bacterial cells.
    MeSH terms: Animals; Biotransformation; Conservation of Natural Resources*; Nitrogen/metabolism; Polyesters/isolation & purification*; Polyesters/metabolism*; Polyesters/chemistry; Tenebrio/metabolism*; Waste Disposal, Fluid/methods*; Reproducibility of Results; 3-Hydroxybutyric Acid/isolation & purification; 3-Hydroxybutyric Acid/metabolism; Pseudomonas mendocina/growth & development; Pseudomonas mendocina/metabolism*; Polyhydroxyalkanoates/isolation & purification; Polyhydroxyalkanoates/metabolism; Biofuels*
  18. Foo LL, Shariffuddin II, Chaw SH, Lee PK, Lee CE, Chen YS, et al.
    Expert Rev Med Devices, 2018 Aug;15(8):597-603.
    PMID: 30095289 DOI: 10.1080/17434440.2018.1506329
    BACKGROUND: The Baska functional endoscopic sinus surgery (FESS) mask is a new supraglottic airway designed for head and neck procedures. This prospective, randomized controlled trial compared the oropharyngeal leak pressure (OLP) of the Baska FESS mask with the laryngeal mask airway (LMA) Supreme in different head and neck positions.

    METHODS: One hundred patients undergoing elective surgery were recruited. OLP was compared in supine position, 45° lateral rotation, 45° neck extension, and 30° neck flexion. Glottic view, insertion time, ease of insertion, number of attempts, ease and time of insertion of gastric tube, and complications were also compared.

    RESULTS: The OLP of the Baska FESS was higher than the LMA Supreme in all head and neck positions studied (p 

  19. Sattar A, Zakaria Z, Abu J, Aziz SA, Gabriel RP
    PLoS One, 2018;13(8):e0202034.
    PMID: 30096205 DOI: 10.1371/journal.pone.0202034
    Culture is considered the gold standard for definitive diagnosis of mycobacterial infections. However, consensus about the most suitable culture procedure for isolation of nontuberculous mycobacteria is lacking. The study compared the recoveries of mycobacteria after decontamination of spiked and fresh avian feces with 4% sodium hydroxide (NaOH), 12% sulfuric acid (H2SO4), or 1% cetylperidinium chloride (CPC), with and without mixture of three antibiotics, namely vancomycin (VAN, 100 μg/ml), nalidixic acid (NAL, 100 μg/ml), and amphotericin B (AMB, 100 μg/ml). The antibiotic mixture was referred to as VNA. Decontamination procedures were evaluated using two (n = 2) avian fecal samples spiked with 106, 104, and 102 CFU/ml of Mycobacterium avium subsp. avium (ATCC 15769) and fresh avian feces (n = 42). M. avium subsp. avium was detected on the culture media from spiked samples (106 and 104 CFU/ml) decontaminated with NaOH, NaOH-VNA, H2SO4, and H2SO4 -VNA for 2-6 weeks. These bacteria were detected in 2-4 weeks when using CPC and CPC-VNA. M. avium subsp. avium cannot be isolated on culture media from spiked samples (102 CFU/ml) decontaminated with any decontaminating agent. Two mycobacterial isolates, namely, Mycobacterium terrae and M. engbaekii, were isolated from field samples decontaminated with NaOH and CPC-VNA. With regard to the contamination rate, the use of CPC-VNA showed lower contamination rates (5.5% and 19.0%) from spiked and field samples than those of the other methods (NaOH: 22.2% and 59.5%, NaOH-VNA: 16.7% and 21.4%, H2SO4: 11.1% and 40.5%, H2SO4-VNA: 5.5% and 21.4%, and CPC: 66.7% and 50%). In conclusion, the decontamination of fecal samples following a two-step procedure with 1% CPC and VNA can ensure high recovery rate of many mycobacteria with the lowest contamination in cultures.
    MeSH terms: Animals; Antitubercular Agents/pharmacology; Feces/microbiology*; Mycobacterium avium Complex/drug effects; Mycobacterium avium Complex/genetics; Mycobacterium avium Complex/isolation & purification*; Mycobacterium avium-intracellulare Infection/microbiology*
  20. Quiroz JC, Geangu E, Yong MH
    JMIR Ment Health, 2018 Aug 08;5(3):e10153.
    PMID: 30089610 DOI: 10.2196/10153
    BACKGROUND: Research in psychology has shown that the way a person walks reflects that person's current mood (or emotional state). Recent studies have used mobile phones to detect emotional states from movement data.

    OBJECTIVE: The objective of our study was to investigate the use of movement sensor data from a smart watch to infer an individual's emotional state. We present our findings of a user study with 50 participants.

    METHODS: The experimental design is a mixed-design study: within-subjects (emotions: happy, sad, and neutral) and between-subjects (stimulus type: audiovisual "movie clips" and audio "music clips"). Each participant experienced both emotions in a single stimulus type. All participants walked 250 m while wearing a smart watch on one wrist and a heart rate monitor strap on the chest. They also had to answer a short questionnaire (20 items; Positive Affect and Negative Affect Schedule, PANAS) before and after experiencing each emotion. The data obtained from the heart rate monitor served as supplementary information to our data. We performed time series analysis on data from the smart watch and a t test on questionnaire items to measure the change in emotional state. Heart rate data was analyzed using one-way analysis of variance. We extracted features from the time series using sliding windows and used features to train and validate classifiers that determined an individual's emotion.

    RESULTS: Overall, 50 young adults participated in our study; of them, 49 were included for the affective PANAS questionnaire and 44 for the feature extraction and building of personal models. Participants reported feeling less negative affect after watching sad videos or after listening to sad music, P

    MeSH terms: Adult; Affect; Analysis of Variance; Auditory Perception; Emotions; Happiness; Heart Rate; Humans; Music; Surveys and Questionnaires; Research Design; Surgical Instruments; Wrist; Young Adult
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