Serum uric acid and metabolic risk factors in three ethnic groups: Asian Indians and Creoles in Mauritius and Chinese in Qingdao, China

In humans with a loss of uricase the final oxidation product of purine catabolism is uric acid (UA). The prevalence of hyperuricemia has been increasing around the world accompanied by a rapid increase in obesity and diabetes. Since hyperuricemia was first described as being associated with hyperglycemia and hypertension by Kylin in 1923, there has been a growing interest in the association between elevated UA and other metabolic abnormalities of hyperglycemia, abdominal obesity, dyslipidemia, and hypertension. The direction of causality between hyperuricemia and metabolic disorders, however, is unceartain. The association of UA with metabolic abnormalities still needs to be delineated in population samples. Our overall aims were to study the prevalence of hyperuricemia and the metabolic factors clustering with hyperuricemia, to explore the dynamical changes in blood UA levels with the deterioration in glucose metabolism and to estimate the predictive capability of UA in the development of diabetes. Four population-based surveys for diabetes and other non-communicable diseases were conducted in 1987, 1992, and 1998 in Mauritius, and in 2001-2002 in Qingdao, China. The Qingdao study comprised 1 288 Chinese men and 2 344 women between 20-74, and the Mauritius study consisted of 3 784 Mauritian Indian and Mauritian Creole men and 4 442 women between 25-74. In Mauritius, re-exams were made in 1992 and/or 1998 for 1 941 men (1 409 Indians and 532 Creoles) and 2 318 non pregnant women (1 645 Indians and 673 Creoles), free of diabetes, cardiovascular diseases, and gout at baseline examinations in 1987 or 1992, using the same study protocol. The questionnaire was designed to collect demographic details, physical examinations and standard 75g oral glucose tolerance tests were performed in all cohorts. Fasting blood UA and lipid profiles were also determined. The age-standardized prevalence in Chinese living in Qingdao was 25.3% for hyperuricemia (defined as fasting serum UA > 420 μmol/l in men and > 360 μmol/l in women) and 0.36% for gout in adults between 20-74. Hyperuricemia was more prevalent in men than in women. One standard deviation increase in UA concentration was associated with the clustering of metabolic risk factors for both men and women in three ethnic groups. Waist circumference, body mass index, and serum triglycerides appeared to be independently associated with hyperuricemia in both sexes and in all ethnic groups except in Chinese women, in whom triglycerides, high-density lipoprotein cholesterol, and total cholesterol were associated with hyperuricemia. Serum UA increased with increasing fasting plasma glucose levels up to a value of 7.0 mmol/l, but significantly decreased thereafter in mainland Chinese. An inverse relationship occurred between 2-h plasma glucose and serum UA when 2-h plasma glucose higher than 8.0 mmol/l. In the prospective study in Mauritius, 337 (17.4%) men and 379 (16.4%) women developed diabetes during the follow-up. Elevated UA levels at baseline increased 1.14-fold in risk of incident diabetes in Indian men and 1.37-fold in Creole men, but no significant risk was observed in women. In conclusion, the prevalence of hyperuricemia was high in Chinese in Qingdao, blood UA was associated with the clustering of metabolic risk factors in Mauritian Indian, Mauritian Creole, and Chinese living in Qingdao, and a high baseline UA level independently predicted the development of diabetes in Mauritian men. The clinical use of UA as a marker of hyperglycemia and other metabolic disorders needs to be further studied. Keywords: Uric acid, Hyperuricemia, Risk factors, Type 2 Diabetes, Incidence, Mauritius, Chinese

Molecular epidemiology of human rhinoviruses

The first part of this work investigates the molecular epidemiology of a human enterovirus (HEV), echovirus 30 (E-30). This project is part of a series of studies performed in our research team analyzing the molecular epidemiology of HEV-B viruses. A total of 129 virus strains had been isolated in different parts of Europe. The sequence analysis was performed in three different genomic regions: 420 nucleotides (nt) in the VP4/VP2 capsid protein coding region, the entire VP1 capsid protein coding gene of 876 nt, and 150 nt in the VP1/2A junction region. The analysis revealed a succession of dominant sublineages within a major genotype. The temporally earlier genotypes had been replaced by a genetically homogenous lineage that has been circulating in Europe since the late 1970s. The same genotype was found by other research groups in North America and Australia. Globally, other cocirculating genetic lineages also exist. The prevalence of a dominant genotype makes E-30 different from other previously studied HEVs, such as polioviruses and coxsackieviruses B4 and B5, for which several coexisting genetic lineages have been reported. The second part of this work deals with molecular epidemiology of human rhinoviruses (HRVs). A total of 61 field isolates were studied in the 420-nt stretch in the capsid coding region of VP4/VP2. The isolates were collected from children under two years of age in Tampere, Finland. Sequences from the clinical isolates clustered in the two previously known phylogenetic clades. Seasonal clustering was found. Also, several distinct serotype-like clusters were found to co-circulate during the same epidemic season. Reappearance of a cluster after disappearing for a season was observed. The molecular epidemiology of the analyzed strains turned out to be complex, and we decided to continue our studies of HRV. Only five previously published complete genome sequences of HRV prototype strains were available for analysis. Therefore, all designated HRV prototype strains (n=102) were sequenced in the VP4/VP2 region, and the possibility of genetic typing of HRV was evaluated. Seventy-six of the 102 prototype strains clustered in HRV genetic group A (HRV-A) and 25 in group B (HRV-B). Serotype 87 clustered separately from other HRVs with HEV species D. The field strains of HRV represented as many as 19 different genotypes, as judged with an approximate demarcation of a 20% nt difference in the VP4/VP2 region. The interserotypic differences of HRV were generally similar to those reported between different HEV serotypes (i.e. about 20%), but smaller differences, less than 10%, were also observed. Because some HRV serotypes are genetically so closely related, we suggest that the genetic typing be performed using the criterion "the closest prototype strain". This study is the first systematic genetic characterization of all known HRV prototype strains, providing a further taxonomic proposal for classification of HRV. We proposed to divide the genus Human rhinoviruses into HRV-A and HRV-B. The final part of the work comprises a phylogenetic analysis of a subset (48) of HRV prototype strains and field isolates (12) in the nonstructural part of the genome coding for the RNA-dependent RNA polymerase (3D). The proposed division of the HRV strains in the species HRV-A and HRV-B was also supported by 3D region. HRV-B clustered closer to HEV species B, C, and also to polioviruses than to HRV-A. Intraspecies variation within both HRV-A and HRV-B was greater in the 3D coding region than in the VP4/VP2 coding region, in contrast to HEV. Moreover, the diversity of HRV in 3D exceeded that of HEV. One group of HRV-A, designated HRV-A', formed a separate cluster outside other HRV-A in the 3D region. It formed a cluster also in the capsid region, but located within HRV-A. This may reflect a different evolutionary history of distinct genomic regions among HRV-A. Furthermore, the tree topology within HRV-A in the 3D region differed from that in the VP4/VP2, suggesting possible recombination events in the evolution of the strains. No conflicting phylogenies were observed in any of the 12 field isolates. Possible recombination was further studied using the Similarity and Bootscanning analyses of the complete genome sequences of HRV available in public databases. Evidence for recombination among HRV-A was found, as HRV2 and HRV39 showed higher similarity in the nonstructural part of the genome. Whether HRV2 and HRV39 strains - and perhaps also some other HRV-A strains not yet completely sequenced - are recombinants remains to be determined.

Measurement of the Λb0 Lifetime in Λb0→Λc+π- Decays in pp̅ Collisions at √s=1.96 TeV

We report a measurement of the lifetime of the Lambda_b baryon in decays to the Lambda_C+ pi- final state in a sample corresponding to 1.1 fb^-1 collected in p-pbar collisions at sqrt(s) = 1.96 TeV by the CDF II detector at the Tevatron collider. Using a sample of about 3000 fully reconstructed Lambda_b events we measure tau(Lambda_b) = 1.401 +- 0.046 (stat) +- 0.035 (syst) ps (corresponding to c.tau(Lambda_b) = 420.1 +- 13.7 (stat) +- 10.6 (syst) um, where c is the speed of light). The ratio of this result and the world average B^0 lifetime yields tau(Lambda_b)/tau(B^0) = 0.918 +- 0.038 (stat and syst), in good agreement with recent theoretical predictions.

Suomen metsäteollisuuden uusien mahdollisuuksien aluetaloudelliset vaikutukset

Biojalostamo lisäisi talouskasvua ja työllisyyttä Tutkimuksessa selvitettiin biojalostamotoiminnan aluetaloudellisia vaikutuksia Kymenlaakson ja Satakunnan maakuntiin. Biodieselin valmistus kohentaisi molemmilla alueilla talouskasvua yhteensä 3,0–3,5 prosenttiyksiköllä eli noin 200 miljoonalla eurolla vuoteen 2020 mennessä. Työllisyys paranisi Kymenlaaksossa 437 ja Satakunnassa 420 henkilötyövuodella. Biojalostamotoiminta näyttäisi tukevan työllisyyttä suhteellisesti vähemmän kuin talouskasvua johtuen alan pääomavaltaisuudesta. Kymenlaakso hyötyisi biojalostamosta hiukan enemmän kuin Satakunta johtuen aluetalouksien rakenteellisista eroista. Metsäteollisuuden menetyksiä voitaisiin kompensoida Kymenlaakso on kärsinyt metsäteollisuuden supistumisesta tähän asti suurimmat menetykset. Biojalostamon perustaminen Kymenlaaksoon voisi merkittävästi korvata paperin tuotannon laskusta aiheutuneita menetyksiä. Talouskasvun suhteen biojalostamo voisi korvata puolet menetyksistä. Työllisyysmenetyksistä biojalostamotoiminta pystyisi kompensoimaan noin neljäsosan. Tukien merkitystä biojalostamon aluetaloudellisiin vaikutuksiin selvitettiin tukityypeittäin ja -tasoittain. Sekä raaka-aine- että tuotantotukivaikutukset jäivät simuloinneissa vaatimattomiksi. Tukien tehottomuutta selittää niiden pienuus. Muut toimialat kärsivät biojalostamoalan tukemisesta, mikä vähentää tukien aluetaloudellista vaikuttavuutta. Toisaalta reaalimaailmassa tuet voivat olla ratkaisevassa asemassa bioenergia-alan käynnistyessä ja sen kehityksen alkumetreillä. Bioenergia-strategian mukainen kehitys tuottaisi tulosta Bioenergian käytön lisäämisen aluetaloudellista vaikuttavuutta tutkittiin Keski-Suomen maakuntaa koskevan tapaustutkimuksen avulla. Vaikutusten laskenta pohjautui maakunnan bioenergian käytön tavoitteiden mukaisiin määriin. Mikäli bioenergian käyttö kasvaisi Keski-Suomessa neljällä terawattitunnilla vuoteen 2015 mennessä, vaikutus talouskasvuun olisi yhteensä 0,5 prosenttiyksikköä eli 35 miljoonaa euroa. Maakunnan työllisyys paranisi yli 200 henkilötyövuodella. Todennäköisesti myönteisiä aluetalousvaikutuksia vahvistaisi vielä alueen energiaostoista johtuvien vuotojen väheneminen energiaomavaraisuuden kasvaessa. Keski-Suomelle voisi kertyä hyötyjä myös bioenergiateknologian alan laitevalmistuksen osaamisen lisääntymisen kautta. Biojalostamotoiminta on täysin uudenlaista toimintaa, joten tilastollista seurantatietoa tältä alalta ei ole käytettävissä. Julkisia teknis-taloudellisia selvityksiä biodieselin tuotannosta on saatavilla suhteellisen niukasti. Koska simuloinneista saadut tulokset perustuvat biojalostamolle oletettuun kustannusrakenteeseen, tuloksia on tästä syystä käsiteltävä vain suuntaa-antavina. Ruralia-instituutti suosittaa biojalostamotoiminnan aluetaloudellisten vaikutusten seuraamista ja laskelmien päivittämistä, kun tarkempaa tietoa biojalostamon tuotannon kustannuksista ja tuotteiden kysynnän rakenteesta on saatavilla. Biojalostamon kustannusrakenne. Biojalostamotoiminta kompensoisi noin puolet massa- ja paperiteollisuuden supistumisesta aiheutuneista talouskasvun menetyksistä Kymenlaaksossa.

Critical Incidents in Internal Relationships

Critical incidents have had an important role in service quality and service management research. The focus of critical-incident studies has gradually shifted from separate acts and episodes towards relationships, and even switching from one relationship to another. The Critical Incident Technique has mainly been used when studying the service sector, concentrating on the customer's perception of critical incidents. Although some studies have considered the perceptions of employees important, critical incidents have not been considered a tool for studying internal relationships to any larger extent. This paper takes a process approach and shifts the focus from an external to an internal setting. It puts forward a new technique for analysing internal relationships from a critical-incident perspective. The technique captures the dynamism in relationships through considering internal critical incidents as micro-processes affecting not only internal but also external relationships.