Prediabetes and Type 2 Diabetes are Independent Risk Factors for Computed Tomography-Estimated Nonalcoholic Fatty Pancreas Disease

OBJECTIVES: Nonalcoholic fatty pancreas disease (NAFPD) is characterized by excessive fat deposition in the pancreas in the absence of alcohol consumption. In this study, we aimed to detect a possible relationship between adipose tissue accumulation, prediabetes and diabetes. METHODS: This cross-sectional and retrospective study included 110 patients. Three groups were classified as controls, patients with prediabetes and patients with type 2 diabetes. The abdominal computed tomography (CT) attenuation measurement results of the pancreas were evaluated independently by two experienced radiologists. CT measurements and biochemical parameters were compared between study groups. The relationship between continuous variables was assessed by using one-way ANOVA. To determine the changes in the dependent variable for the effects on study groups, the independent variable was adjusted using ANCOVA. A p-value less than 0.05 was considered statistically significant. RESULTS: The presence of prediabetes and type 2 diabetes was correlated with a decrease in the mean Hounsfield Unit (HU) value of the pancreas (p=0.002). Age was determined to be an independent risk factor and was correlated with NAFPD (p=0.0001). When compared to the controls (p=0.041), 71% of patients with prediabetes and 67% of patients with type 2 diabetes were observed to have an increased incidence of NAFPD. Decreased serum amylase was found to be correlated with the mean HU value of the pancreas (p=0.043). CONCLUSION: NAFPD was independently correlated with both prediabetes and type 2 diabetes adjusted for age (p=0.0001) in this study. Additionally, age was determined to be an independent risk factor and was correlated with NAFPD

The Activity of Oxygenic Photosynthetic Microbial Consortia on Different Granites

WOS: 000336887900011Deterioration of stone is a combined process caused by physical, chemical and biological factors especially, microbial growth. Various microorganisms are playing a key role in the weathering of historical artifacts, buildings, and monuments made of granite, marble, and other dimension stones. In this study, the biodeterioration of three types granite, Blue Pearl from Norway, Pergamon Grey from Turkey, and Rosa Porrino from Spain were studied for thirty days under laboratory conditions. The results showed that two of the granite surfaces, Pergamon Grey and Rosa Porrino, supported a heavy colonization of phototrophic microbial consortia. These results also showed that filamentous phototrophic microorganisms were dominant on the surfaces of the granites and indicated that the porosity, the availability of water and chemical composition of the granite have encouraged colonization and caused modification on the surfaces. The filamentous aggregates, possibly calcified fibrillar bodies in the inner parts of granites were also detected by SEM studies.Nigde University [FEB 2010/31]The authors would like to extend their gratitude to Nigde University for the financial support for project FEB 2010/31

A Comparative study on the activity of oxygenic photosynthetic consortia on marble and granite

This Many kinds of microorganisms are playing key role in degradation of historical artifacts, buildings and monuments made of marble, granite and other dimension stones. It is well known that, photoautotrophic microorganisms predispose the stone surface as a breeding-ground for other group of microorganisms. However, the effects of photoautotrophic and other microorganisms on stone materials, where hygiene is crucial, are not well known. Until now, the relation between microorganisms and rock properties and its effect on usage is not investigated. In this study; the biological weathering of AW (true marble) and BP (granite) has been investigated in laboratory condition. Both stone surfaces also supported a heavy colonization of phototrophic microbial consortia (outer and inner part, respectively). After phototrophic microbial growth on AW and BP, while AW turned to yellowish green from original white color, BP turned to green from original grey color. Inner sides of stones, filamentous biota, are possible member of cyanobacteria, were dominant. However, small spherical aggregates, possible calcified globular bodies on the stones were detected with SEM studies

Oksijenik Fotosentetik Mikrobiyal Topluluğun Farklı Granitler Üzerindeki Aktivitesi

Taşın aşınması fiziksel, kimyasal ve biyolojik, özellikle mikrobiyal gelişmenin neden olduğu kombine birişlemdir. Çeşitli mikroorganizmalar granit, mermer ve diğer taşlardan yapılmış heykel ve binaların; tarihieserlerin aşınmasında anahtar rol oynamaktadır. Bu çalışmada, Blue Pearl (Norveç), Bergama Gri (Türkiye)ve Rosa Porrino (İspanya) olmak üzere üç farklı granitin laboratuar koşulları altında 30 gün süreyle biyolojikaşınması araştırılmıştır. Sonuçlar, Bergama Gri ve Rosa Porrino granitlerinin yoğun bir fototrofikmikroorganizma kolonizasyonunu desteklediğini göstermiştir. Granit yüzeyinde ipliksi fototrofikmikroorganizmalar daha baskındır. Porozite, suyun kullanılabilirliği ve granitin kimyasal bileşimikolonizasyonu etkilediği ve bunların yüzeyde değişmelere neden olduğu görülmüştür. SEM çalışmalarındagranitin iç kısımlarında kalsifiye yapılar olarak ipliksi yığınlar tespit edilmiştir. SEM araştırmaları, üçgranitde de ipliksi mikroorganizmaların ipliksi uzantılarıyla taşa yapıştığını ve bunların granit içine nüfuzettiğini göstermiştirDeterioration of stone is a combined process caused by physical, chemical and biological factors especially,microbial growth. Various microorganisms are playing a key role in the weathering of historical artifacts,buildings, and monuments made of granite, marble, and other dimension stones. In this study, thebiodeterioration of three types granite, Blue Pearl from Norway, Pergamon Grey from Turkey, and RosaPorrino from Spain were studied for thirty days under laboratory conditions. The results showed that twoof the granite surfaces, Pergamon Grey and Rosa Porrino, supported a heavy colonization of phototrophicmicrobial consortia. These results also showed that filamentous phototrophic microorganisms weredominant on the surfaces of the granites and indicated that the porosity, the availability of water andchemical composition of the granite have encouraged colonization and caused modification on the surfaces.The filamentous aggregates, possibly calcified fibrillar bodies in the inner parts of granites were alsodetected by SEM studies

A Comparative study on the activity of oxygenic photosynthetic consortia on marble and granite

2nd International Conference on Environmental Science and Technology (ICEST 2011) -- FEB 26-28, 2011 -- Singapore, SINGAPOREWOS: 000392767300099This Many kinds of microorganisms are playing key role in degradation of historical artifacts, buildings and monuments made of marble, granite and other dimension stones. It is well known that, photoautotrophic microorganisms predispose the stone surface as a breeding-ground for other group of microorganisms. However, the effects of photoautotrophic and other microorganisms on stone materials, where hygiene is crucial, are not well known. Until now, the relation between microorganisms and rock properties and its effect on usage is not investigated. In this study; the biological weathering of AW (true marble) and BP (granite) has been investigated in laboratory condition. Both stone surfaces also supported a heavy colonization of phototrophic microbial consortia (outer and inner part, respectively). After phototrophic microbial growth on AW and BP, while AW turned to yellowish green from original white color, BP turned to green from original grey color. Inner sides of stones, filamentous biota, are possible member of cyanobacteria, were dominant. However, small spherical aggregates, possible calcified globular bodies on the stones were detected with SEM studies.Asia Pacific Chem Biol & Environm Engn Soc, Int Assoc Comp Sci & Informat TechnolNigde University [FEB 2010/31]The authors would like to extend their gratitude to Nigde University for the financial support for FEB 2010/31 project

Impact of biofilm in the maturation process on the corrosion behavior of galvanized steel: long-term evaluation by EIS

In this study, the effect of biofilm in the maturation process on the corrosion behavior of galvanized steel was investigated in a model of a recirculating water system over 6months. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization methods were used to determine the corrosion behavior of galvanized steel. The biofilm and corrosion products on the galvanized steel surfaces were investigated by using scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry(EDS). EIS results showed that the structure of the biofilm changed during the maturation process over time and the altering structure of the biofilm affects the corrosion behavior of galvanized steel. Also, EIS analyses validated that the biofilm has a dynamic and complex structure. The data obtained from SEM and macroscopic images indicated that EIS is an effective method for monitoring the biofilm-development process

Microbiologically influenced corrosion of galvanized steel by Desulfovibrio sp. and Desulfosporosinus sp. in the presence of Ag-Cu ions

The effects of Ag-Cu ions on the microbiologically induced corrosion of galvanized steel in the presence of Desulfovibrio sp. and Desulfosporosinus sp. were investigated. The corrosion behavior of galvanized steel was analyzed by potentiodynamic polarization and electrochemical impedance spectroscopy. The biofilm, corrosion products and Ag-Cu ions on the surfaces were investigated by using scanning electron microscopy, energy dispersive X-ray spectrometry and elemental mapping

Toward a better understanding of microbiologically influenced corrosion caused by sulfate reducing bacteria

© 2019Sulfate reducing bacteria (SRB) are often the culprits of microbiologically influenced corrosion (MIC) in anoxic environments because sulfate is a ubiquitous oxidant. MIC of carbon steel caused by SRB is the most intensively investigated topic in MIC because of its practical importance. It is also because biogenic sulfides complicate mechanistic SRB MIC studies, making SRB MIC of carbon steel is a long-lasting topic that has generated considerable confusions. It is expedient to think that biogenic H2S secreted by SRB acidifies the broth because it is an acid gas. However, this is not true because endogenous H2S gets its H+ from organic carbon oxidation and the fluid itself in the first place rather than an external source. Many people believe that biogenic H2S is responsible for SRB MIC of carbon steel. However, in recent years, well designed mechanistic studies provided evidence that contradicts this misconception. Experimental data have shown that cathodic electron harvest by an SRB biofilm from elemental iron via extracellular electron transfer (EET) for energy production by SRB is the primary cause. It has been demonstrated that when a mature SRB biofilm is subjected to carbon source starvation, it switches to elemental iron as an electron source and becomes more corrosive. It is anticipated that manipulations of EET related genes will provide genetic-level evidence to support the biocathode theory in the future. This kind of new advances will likely lead to new gene probes or transcriptomics tools for detecting corrosive SRB strains that possess high EET capabilities