Different Groups Of Population Research Articles

Aktivní prvky bezpečnosti v rámci výuky cykloturistiky na ZŠ a SŠ

Biking tourism is becoming the dominant tourist activity in the education of students to meet with teaching cycling courses primarily through cycling. Their implementation is still risky. In research we focused on the active component of the safety aspects of tourism and cycling. We used the method of observation, interview, and interview questionnaire. Our research involved three different groups of population. Results suggest teachers and students interested in learning not only in the cycling course. The most significant barrier form staffing levels and riding skills of students.

Patterns of knowledge and condom use among population groups: Results from the 2005 Ethiopian Behavioral Surveillance Surveys on HIV

Background: Behavioral surveys help interpret the magnitude of HIV/AIDS. We analyzed indicators of knowledge on HIV/AIDS and condom use among different groups of populations selected for behavioral surveillance in Ethiopia. Methods: We used HIV/AIDS Behavioural Surveillance Surveys (BSS) data collected from ten target groups in Ethiopia. These were female sex workers, military personnel, police force, pastoralists, long distance truck drivers, intercity bus drivers, road construction workers, teachers, factory workers and ANC catchment populations. Results: Data from 14,524 individuals were analyzed. The majority were male (63.6%). Knowledge of the three preventive methods (abstinence, faithfulness and consistent condom use), misconceptions and comprehensive knowledge was 57%, 75% and 18.5%, respectively. Female sex workers and the defence force showed positive results in using condom during last sexual encounter and did so consistently with non regular sexual partners and paying partners. Women, pastoralists and the illiterate were negatively impacted. Conclusion: Inadequate and incorrect knowledge on HIV/AIDS was observed with special deficiency among the underserved groups such as pastoralists. Women and the older age group were found to be at a disadvantage. The findings indicate the need to expand prevention activities to hard-to-reach groups and such a certain specific population segments. Population groups such as female sex workers and the defense force that were known to be severely affected by the epidemic and are focus of HIV/AIDS interventions showed positive behaviors. Although this s encouraging, considerable proportion of the study groups did not use condom during sex with non regular partners. This underscores the importance of intensifying interventions across all groups and extended to their localities.

Analysis of urinary iodine levels in normal pregnant Chinese women in four districts

Objective To analyze the median urinary iodine(MUI)level in normal pregnant women based on World HeMth Organization(WHO) recommended criterion,and to provide the MUI reference values for monitoring and evaluating iodine nutrition during pregnancy and related studies.Methods Total 604 normal pregnant and 192 non-pregnant women(as a comparison)were selected from a cross-sectional survey.These women were all healthy,iodine sufficient,with normal thyroid function,and negative anti-thyroid antibodies.The iodine content in drinking water,edible salt,and urine was determined by standard methods,and serum TSH,FT4,FT3,thyroid peroxidaseantibody(TPOAb),and thyroglobulin antibody(TgAb)were measured using chemiluminescent immunoassay.Resuits (1)The iodine in drinking water was 3.0μg/L indicating such small amount of iodine could be neglected for daily iodine intake.(2)All women consumed iodized salt with the median iodine in salt of 31.7 mg/kg.The daily iodine intake of at least 240 μg could be roughly estimated if an average of 10 g salt was taken per person per day and further subtracted by 20%iodine lost during cooking,which could meet the iodine needs during pregnancy.(3)The MUI of 173.1μg/L was calculated from 604 pregnant women having 174.5,167.0,and 180.7 μg/L during the first,second,and third trimesters,respectively,reaching the optimal level of 150-249 μg/L recommended by WHO for pregnant women.However,our data showed relatively lower levels,not reaching 200μg/L.The MUI of 240.2μg/L was calculated from 192 non-pregnant women,reaching the level ofabove requirement(200-299μg/L) recommended by WHO for adults.(4)All women were euthyroid and antibody-negative,but the TSH level in pregnant women was lower than that in non-pregnant women,in particular during the first trimester,while FT4 and FT3 were considerably decreased compared with the non-pregnant(with an exception of FT4 in the first trimester),and both gradually declined with the gestational age.Conclusions The optimal MUI level of 150-249 μg/,L recommended by WHO can be applied to pregnant Chinese women,but our data provided a relatively low range of 150-200μ/L throughout pregnancy.The higher MUI of 240.2μg/L in non-pregnant women indicated that iodized salt with different contents should be supplied on market to meet the requirement of different groups of population. Key words: Pregnant women; Median urinary iodine; Iodized salt; Reference Values

Major Sources of Sodium Intake of the Korean Population at Prepared Dish Level - Based on the KNHANES 2008 & 2009 -

We attempted to define the sources of sodium intake for the Korean population at prepared dish level to provide a basis for developing sustainable nutrition policies and feasible programs for sodium intake reduction. Dietary intake data from 2008 and 2009 Korea National Health and Nutrition Examination Survey was used in the analysis for sodium intake sources. Sodium intake from individual dish consumed by each subject was calculated and used in delineating major sodium sources at dish and dish group level for sub-populations of different sex and age. Also, sodium intake was compared between eaters and non-eaters of some specific dish groups with considerable contribution to total sodium intake. The number of subjects included in the analysis was 18,022 and mean sodium intake was 4,600 mg/capita/day. Major sources of sodium intake at dish group level were in the following order: kimchi (1125 mg, 24.5%), noodles (572 mg, 12.4%), soups (488 mg, 10.6%), stews (399 mg, 8.7%), and cooked rice (284 mg, 6.2%). The magnitude of contribution to total sodium intake by soups and stews was different by age group. Sodium intake difference between eaters and non-eaters was much larger for kimchi group (2,343 mg for male, 1,452 mg for female) than for soups or stews. Interaction between consumption of aforementioned specific dish groups and age was highly significant (p < 0.0005) for both sexes. This study revealed an importance of having not only the control over sodium content of foods/dishes, but also the customized approach for different groups of population to accomplish an appreciable reduction in sodium intake. (Korean J Community Nutr 16(4) : 473~487, 2011)

Elliptic Fourier Analysis of leaf outline shape in forest fragment populations of Anthurium sinuatum and A. pentaphyllum (Araceae) from Northeast Brazil

A field-based comparative study of leaflet outline shape in five populations of Anthurium sinuatum Benth. ex Schott from Amazonia and humid brejo forests of Ceara, Northeast Brazil, and ten populations of A. pentaphyllum (Aubl.) G. Don var. pentaphyllum from Amazonia and the Brazilian Atlantic forest is reported. 1,120 leaflets from 561 individuals in 15 populations were sampled. Using images, leaflet outlines were captured by digitisation and subjected to Elliptic Fourier Analysis (EFA) to produce matrices of Fourier coefficients based on 40 harmonics; lateral and central leaflets were analysed separately. Twelve shape variables, extracted from the Fourier coefficient matrices, described the leaflet outlines of 531 individuals. Between-population relationships were estimated using cluster analysis, Canonical Variates Analysis and non-parametric MANOVA. Amazonian populations showed the greatest within-population variability. In A. sinuatum the Pacatuba population was the most distinct in Ceara and the Para population (Amazonia) was not significantly different from those at Ibiapaba and Maranguape (both Ceara). In A. pentaphyllum 80% of population pairs were significantly different and three significantly different groups of populations were observed. Although the populations of A. pentaphyllum displayed considerable variation, the morphological patterns did not correlate with previously reported molecular ones. The two species were found to be slightly but significantly different on leaf outline data.

Tracking composition and dynamics of nitrification and denitrification microbial community in a biofilm reactor by PCR-DGGE and combining FISH with flow cytometry

A compact suspended carrier biofilm reactor (SCBR) was operated at three different C/N ratios (C/N = 10:1, 5:1 and 3:1) with focus on reactor performance and microbial community composition of nitrifying and denitrifying bacteria. The process was capable of achieving over 90% removal of chemical oxygen demand (COD) and over 83.3% of simultaneous nitrification and denitrification (SND) efficiency. Denaturing gradient gel electrophoresis (DGGE) analysis showed that the diversity of ammonia-oxidizing bacteria (AOB) community decreased with inoculation sludge, C/N ratio 3:1, 10:1 and 5:1 in turn. Phylogenetics analysis indicated that there were three distinct groups of AOB in Betaproteobacteria subdivision, where Nitrosomonas were the dominant members in the biofilm. Fluorescence in situ hybridization-flow cytometry (FISH-FCM) results revealed that Alpha-, Beta- and Gamma-proteobacteria accounted for over 50% of all cells. Additionally, the clusters of Nitrosomonas, Nitrosospira, Nitrobacter, Nitrospira and AOB of Betaproteobacteria yielded a similar distribution pattern about 5–12% of all cells. Nested analysis of variance assay (ANOVA) demonstrated that the C/N ratio did not significantly affect the shift of populations in different groups of nitrifying and denitrifying bacteria detected by FISH-FCM.

Hypertension management in older people

This article provides an overview of the blood pressure (BP) in elderly, how it is assessed and its management. It explains the need of multiple BP measurements as well as the standing measurement and use of ambulatory blood pressure monitoring for assessing blood pressure in elderly. Some years ago elderly people were seen as a different group of population who needed to be managed differently for BP and this view is now changed. The management can be pharmacological or non-pharmacological, which includes weight reduction, salt reduction, reducing alcohol consumption, carrying out regular exercise and physical activity, healthy diet and smoking cessation. This article explains on how the anti-hypertensive medication should be started on an elderly patient and what measures should be taken while they are on this medication.

What do artificial neural networks tell us about the genetic structure of populations? The example of European pig populations

General and genetic statistical methods are commonly used to deal with microsatellite data (highly variable neutral genetic markers). In this paper, the self-organizing map (SOM) that belongs to the unsupervised artificial neural networks (ANNs) was applied to analyse the structure of 58 European and two Chinese pig populations (Sus scrofa) including commercial lines, local breeds and cosmopolitan breeds. Results were compared with other unsupervised classification or ordination methods such as factorial correspondence analysis, hierarchical clustering from an allele sharing distance and the Bayesian genetic model and with principal components analysis and neighbour joining from allelic frequencies and genetic distances between populations. Like other methods, SOMs were able to classify individuals according to their breed origin and to visualize similarities between breeds. They provided additional information on the within- and between-population diversity, allowed differences between similar populations to be highlighted and helped differentiate different groups of populations.

Bacterial flora of processed broiler chicken skin after successive washings in mixtures of potassium hydroxide and lauric acid.

Changes in the size of populations of different groups of bacteria composing the normal flora of processed broiler skin were examined after each of five consecutive washings in mixtures of potassium hydroxide (KOH) and lauric acid (LA). Portions of skin from commercially processed broiler carcasses were washed in distilled water (control) or in mixtures of 0.25% KOH-0.5% LA or 0.5% KOH-1% LA by using a stomacher laboratory blender to agitate the skin in the solutions. After each wash, skin was transferred to fresh solutions, and washing was repeated to provide samples washed one to five times in each solution. Bacteria in rinsates of the washed skin were enumerated on plate count (PC) agar, Staphylococcus (STA) agar, Levine eosin methylene blue (EMB) agar, lactic acid bacteria (LAB) agar, and Perfringens (PER) agar with TSC supplement. Selected isolates recovered on each medium were identified. Overall, no significant differences were observed in numbers of bacteria recovered on PC, STA, or EMB agars from skin after repeated washing in water, but there were significant reductions in the number of bacteria recovered on LAB and PER agars. Repeated washing of skin in 0.25% KOH-0.5% LA or 0.5% KOH-1% LA generally produced significant reductions in the number of bacteria recovered on all media. Furthermore, no bacteria were recovered on PER agar from skin washed five times in 0.25% KOH-0.5% LA. Likewise, no bacteria were recovered on EMB or LAB agars from skin washed three or more times in 0.5% KOH-1% LA or on PER agar from skin washed four or five times in this solution. Staphylococcus spp. were identified as the skin isolates with the highest degree of resistance to the bactericidal activity of KOH-LA. Findings indicate that although bacteria may be continually shed from poultry skin after repeated washings, bactericidal surfactants can be used to remove and kill several types of bacteria found on the surface of the skin of processed broilers.

Bloodstream Infections

Information available on bloodstream infection (BSI) is usually restricted to short periods of time, certain clinical backgrounds, or specific pathogens, or is just outdated. We conducted the current prospective study of patients with BSI in a 1750-bed teaching hospital to evaluate workload trends and the incidence and etiology of BSI in a general hospital during the last 22 years, including the acquired immunodeficiency syndrome (AIDS) era. The main outcome measures were laboratory workload, trends in incidence per 1000 admissions and per 100,000 population of different microorganisms, and the impact of the human immunodeficiency virus (HIV) epidemic in the period 1985-2006.From 1985 to 2006 we had 27,419 episodes of significant BSI (22,626 patients). BSI incidence evolved from 16.0 episodes to 31.2/1000 admissions showing an annual increase of 0.83 episodes/1000 admissions (95% confidence interval, 0.61-1.05; p < 0.0001). The evolution of the incidence per 1000 admissions and per 100,000 population of different groups of microorganisms was as follows: Gram positives 8.2 to 15.7/1000 admissions and 66.8 to 138.3/100,000 population; Gram negatives 7.8 to 16.2/1000 admissions and 63.5 to 141.9/100,000 population; anaerobes 0.5 to 1.3/1000 admissions and 4.1 to 11.7/100,000 population; and fungi 0.2 to 1.5/1000 admissions and 1.7 to 12.5/100,000 population. All those differences were statistically significant. We observed the emergence of multiresistant Gram-positive and Gram-negative microorganisms. At least 2484 episodes of BSI (9.1%) occurred in 1822 patients infected with HIV. The incidence of BSI in HIV-infected patients increased from 1985 and reached a peak in 1995 (17.6% of BSI). Since 1995, the decrease was continuous, and in 2006 only 3.9% of all BSI episodes occurred in HIV-positive patients in our institution. We conclude that the BSI workload has increased in modern microbiology laboratories. Gram-positive pathogens have overtaken other etiologic agents of BSI. Our observation shows the remarkable escalation of some resistant pathogens, and the rise and relative fall of BSI in patients with HIV.

MELASMA IN BASRAH: A CLINICAL AND EPIDEMIOLOGICAL STUDY

A total of 392 individuals were enrolled in the study divided into two main groups (196 melasma cases and 196 control group). Melasma prevalence and diagnosis were done by screening different groups of population on clinical basis with the aids of Wood's light examination (by the same dermatologist). The study was carried out at the departments of microbiology and dermatology in Basrah medical college during the period from October 2003 to the end of March 2005. The study showed that melasma was more prevalent in age intervals of 21-30 years and 31-40 years presented in 45.7% and 38.2% respectively. The prevalence of melasma among dermatological clinic attendants was 0.57% while the prevalence among pregnant women, female teachers and male outdoor workers were presented in 37.9%, 17.5% and 14.2% respectively. Melasma was more frequent among brown skin patients (75.5%) compared to white (18.3%) and black (6.1%) colored skin (P

Comparison of predicted and measured concentrations of selected pharmaceuticals, fragrances and hormones in Spanish sewage

A review of consumption and excretion rates of 17 pharmaceuticals, two musk fragrances and two hormones by the Spanish population in 2003 was performed. For that purpose, three different models were used: (i) extrapolation of the per capita use in Europe to the number of inhabitants of Spain for musk fragrances; (ii) annual prescription items multiplied by the average daily dose for pharmaceuticals and; (iii) excretion rates of different groups of population for hormones. This information enabled the prediction of the expected concentrations (PEC) entering sewage treatment plants (STPs), which were subsequently compared with the measured environmental concentrations (MEC) in raw sewage. Annual drugs consumption in Spain ranges from few kilograms (Oxazepam and 17α-ethinylestradiol) to several hundred of tons (Ibuprofen). The quantities of musks used accounts for 110–450 kg d −1 and the total amount of hormones excreted daily reaches almost 1 kg d −1. 12 out of 21 selected substances were predicted to be present in raw sewage influent at concentrations greater than 100 ng l −1 and these predicted concentrations fitted with the measured values for half of them (Carbamazepine, Diazepam, Ibuprofen, Naproxen, Diclofenac, Sulfamethoxazole, Roxithromycin, Erythromycin and 17α-ethinylestradiol).

Counting the Greeks in Egypt: Immigration in the First Century of Ptolemaic Rule

This paper presents the data and the methods available to estimate the number of Greeks immigrating and settling in Ptolemaic Egypt. I shall argue that the evaluations generally proposed (10% of Greeks) are too high and the flow of immigration implicitly expected too regular. The new calculations demonstrate that we should rather consider 5% of Greeks in Egypt. I use four independent methods to evaluate the number of Greeks based on an estimation of the number of: (1) Greek soldiers fighting at Raphia (217 BC); (2) Macedonian soldiers settled in Egypt; (3) cavalry men granted with land; (4) adult Greek males living in the Fayyum. The first three methods focus on soldiers while the fourth one provides us with a mathematical model for evaluating both Greek military and civilian settlers. These demographic revisions refine our analysis of the socio-economic and cultural interactions between the different groups of population.

Famines without shortages

We present a model that describes features common to many famines: (i) a famine may occur without a substantial decline in aggregate food availability; (ii) famines often have a very uneven impact on different groups of population; and (iii) expectations about future food markets affect current market behaviour and result in starvation for certain groups of population. We consider an exchange economy with two types of agents, food producers and non-food producers. An agent starves if his consumption of food falls below the minimum subsistence level. We show that non-food producers are more vulnerable to starvation than food producers, and may fail to survive even when the aggregate amount of food in the economy is enough to guarantee survival of all agents. In an economy with government procurement and public distribution, we show that the government policy may become unsustainable if the food producers condition their expectations about future public sales on current public stock level.

Th-P15:95 The cellular retinoic acid binding protein II gene (CRABP-2) is associated with increased plasma cholesterol in three different groups of population

Th-P15:95 The cellular retinoic acid binding protein II gene (CRABP-2) is associated with increased plasma cholesterol in three different groups of population

Microbiology of a wetland ecosystem constructed to remediate mine drainage from a heavy metal mine

A pilot passive treatment plant (PPTP) was constructed to evaluate the potential of a composite wetland system to remediate acidic, metal-rich water draining the former Wheal Jane tin, in Cornwall, England. The treatment plant consists of three separate and controllable composite systems, each of which comprises a series of aerobic wetlands for iron oxidation and precipitation, a compost bioreactor for removing chalcophilic metals and to generate alkalinity, and rock filter ponds for removing soluble manganese and organic carbon. To understand the roles of microorganisms in remediating acid mine drainage (AMD) in constructed wetland ecosystems, populations of different groups of cultivatable acidophilic microbes in the various components of the Wheal Jane PPTP were enumerated over a 30-month period. Initially, moderately acidophilic iron-oxidising bacteria (related to Halothiobacillus neapolitanus) were found to be the major cultivatable microorganisms present in the untreated AMD, though later heterotrophic acidophiles emerged as the dominant group, on a numerical basis. Culturable microbes in the surface waters and sediments of the aerobic wetlands were similarly dominated by heterotrophic acidophiles, though both moderately and extremely acidophilic iron-oxidising bacteria were also present in significant numbers. The dominant microbial isolate in waters draining the anaerobic compost bioreactors was an iron- and sulfur-oxidising moderate acidophile that was closely related to Thiomonas intermedia. The acidophiles enumerated at the Wheal Jane PPTP accounted for 1% to 25% of the total microbial population. Phylogenetic analysis of 14 isolates from various components of the Wheal Jane PPTP showed that, whilst many of these bacteria were commonly encountered acidophiles, some of these had not been previously encountered in AMD and AMD-impacted environments.

RESPIRATORY HEALTH EFFECTS OF AIR POLLUTION IN MORBIDITY AMONG CHILDREN RESIDING IN CIUDAD JUAREZ, CHIHUAHUA, MEXICO

ISEE-40 Introduction: Various epidemiological studies have provided evidence of the adverse effect of air pollution on health in different groups of populations. Few studies, however, have focused on young children and none evaluated the impact of air pollution on groups of children that may be more vulnerable because of poor living conditions. We conducted a study in Ciudad Juarez, Chihuahua, Mexico, to determine the health effects of air pollution among children with different living conditions. Methods: The number of respiratory-related emergency room (ER) visits among children younger than 16 years of age was obtained from two major clinics in the city during the period of the study (1997–2001). In addition levels of air pollutants from the governmental air monitoring system from the similar period of time were obtained and related with the morbidity information using generalized additive models (GAM), and adjusted by minimum temperature, days of week and weekends, season and year of the study. Results: The annual mean concentration of PM10 ranged from 33.05 ug/m3 to 43.20 ug/m3, during the period of the study and in 6 days of the study the PM10 levels were above the Mexican standard (150 ug/m3). The annual mean concentration for ozone ranged from 23.4 ppb to 32.7 ppb, during 14 days of the study the Mexican standard for ozone was exceeded (110 ppb). From the total ER visits due respiratory diseases, 37% of them were observed in children younger than 1 year of age due low respiratory infectious diseases. An increase of 5.1% of respiratory-related ER visits (95% CI 2.1% – 8.5%) per 20 ppm of increase of 1-hr maximum of ozone three days prior to the visit. The major increased was observed because of asthma in a one day lag (8.3%; 95% CI, 3.8% – 13.1%). When we related the ER visits with different levels of PM10 no effect was observed. Discussion: Our results in this study showed a significant increase in respiratory-related ER visits due to ozone exposure although the ozone levels were lower than the Mexican standard. No effect was observed regarding the particulate exposure.

Historicity and the population genetics of Drosophila melanogaster and D. simulans.

We summarize data showing that there is population structure in African populations of Drosophila from the melanogaster-simulans complex. In D. melanogaster, population structuring is found at individual loci, but is obscured by population structuring for large inversions that simultaneously affect several loci. In D. simulans, molecular polymorphism at the X-linked vermilion locus suggests that different groups of populations have been geographically isolated for some time. Invading populations are probably derived from different areas in Africa. European populations originate from an east African population that was probably not at a demographic equilibrium. The origin of the Antilles population is apparently different and is as yet unknown. In south-western France, populations from these two species undergo different population structuring at the scale of a few kilometres: D. melanogaster makes up a large panmictic population, whereas D. simulans forms a metapopulation that is divided into smaller demes.

Negative correlation between aneuploidy and growth in the Pacific oyster, Crassostrea gigas: ten years of evidence

This study unites previous and new observations that chromosome loss in somatic cells of juveniles of the Pacific oyster Crassostrea gigas is associated with reduced growth rate. New data were obtained from four hatchery-produced progenies. Within each progeny, oysters of identical age were sampled and classified as fast-growing or slow-growing according to their shell length, or live weight. Chromosome numbers were individually scored from 30 randomly chosen metaphases from gill tissue. Although the diploid chromosome number in C. gigas is 2 N=20, hypodiploid cells of 2 N=19, 18 or 17 were observed in all progenies. The difference in percentage of aneuploidy between fast- and slow-growing oysters ranged from 5% to 22% and was highly significant. In one progeny, a highly significant negative correlation ( R 2=0.58) was observed between individual level of aneuploidy and growth performances individually recorded under common controlled conditions. The consistency of the negative relationship between growth rate and aneuploidy was obvious in all populations studied between 1988 and 1999. However, when comparing aneuploidy between fast- and slow-growing oysters, two different groups of populations can be clearly distinguished. The question remains to determine the cause of these differences.

Genetic variation and differentiation in Nordic populations of Elymus alaskanus (Scrib. ex Merr.) Löve (Poaceae)

To gain information on the extent and nature of genetic variation in Elymus alaskanus, levels and distribution of genetic variation were assessed within and among 13 populations originating from Iceland, Norway, Sweden and Russia using allozymes. The results showed that four (30.7%) of the 13 loci were polymorphic within the species, while the mean percentage of polymorphic loci within the populations was 1.9%. The mean number of alleles per locus for the species was 1.8 and 1.02 across the populations. Genetic diversity at the species level was low (Hes=0.135), and mean population diversity was notably lower (Hep=0.005). A high degree of genetic differentiation was observed among populations. The salient points emerging from this study are: (1) statistically significant differences were found in allele frequencies among populations for every polymorphic locus (P<0.001), (2) the high mean coefficient of gene differentiation (GST) showed that 95% of the total allozyme variation was attributable to differences among populations, and (3) relatively high genetic distances between the populations were obtained (mean D=0.16). The Norwegian populations had the highest genetic diversity as compared with the other populations. Geographical comparisons revealed three different groups of populations clearly differentiated, i.e. Scandinavia (Norway and Sweden), Iceland and Russia. Cluster and principal coordinates analyses revealed the same genetic patterns of relationships among populations. Generally, this study indicates that E. alaskanus contains low allozymic variation in its populations. The implications of these results for the conservation of the species are discussed.