Search results for "16"

Antidiabētiskā medikamenta metformīna lietošanas ietekme uz cilvēka zarnu mikrobiomu

2015

Metformīns ir plaši lietots medikaments 2. tipa cukura diabēta ārstēšanā. Pastāv hipotēze, ka metformīna ietekme uz organismu daļēji varētu tikt skaidrota ar tā mijiedarbību ar zarnu mikrobiomu. Bakalaura darba mērķis bija noskaidrot, kā metformīns ietekmē zarnu mikrobioma kompozīciju. Darba ietvaros tika izdalīta mikrobiālā DNS no astoņu cilvēku fēču paraugiem, kas bija ievākti dažādos laika posmos no metformīna lietošanas uzsākšanas, un, izmantojot lielapjoma paralēlo sekvenēšanu, veikta 16S rRNS V3 reģiona analīze, lai salīdzinātu mikrobioma kompozīciju. Pēc nedēļu ilgas metformīna lietošanas tika novērotas būtiskas izmaiņas vairāku taksonomisko vienību īpatsvarā un mikrobioma iekšējās d…

Synthesis and characterization of ferrocene-based Schiff base and ferrocenecarboxaldehyde oxime and their adsorptive removal of methyl blue from aque…

2018

Abstract The ferrocene-based Schiff base 3 was synthetized by reaction of ferrocenecarboxaldehyde 1 with 4-aminoantipyrine 2. However, the reaction of 1 with hydroxylamine affords ferrocenecarboxaldehyde oxime 4. Compounds 3 and 4 were fully characterized by IR, 1H, 13C and DEPT-135 NMR spectroscopy, elemental analyses and also by single crystal X-ray diffraction. Compounds 3 and 4 were used to remove anionic methyl blue dye from wastewater. The results established that both compounds have high adsorption capacity towards methyl blue. Langmuir adsorption capacity of compound 4 (464 mmol/g) is much higher than that of compound 3 (193 mmol/g) at 25 °C. The kinetics data was fitted well pseudo…

Dutch forest products' trade in the Baltic from the Late Middle Ages to the Peace of Munster in 1648

1994

Role of microRNAs in fetal heart development and in isolated cardiac progenitor cells

2012

Estudio transversal de la microbiología salival mediante pirosecuenciación en escolares de la Comunitat Valenciana y su relación con la caries dental

2013

La salud oral, que está fuertemente influenciada por la microbiota oral, ejerce un papel significativo en la salud general. Las comunidades bacterianas orales contienen especies que promueven estados de salud, mientras que otras contribuyen a la enfermedad. Conocer qué especies están presentes y cómo se componen las comunidades microbianas en estados de salud es el primer paso para comprender qué cambios pueden llevar a la enfermedad. El tipo de muestras a utilizar para este tipo de estudios, bien con objetivos epidemiológicos o etiológicos, es crucial. La saliva representa un medio fácil y no invasivo de obtención de muestras que contengan bacterias orales de varias localizaciones como las…

Response of Soil Microbial Communities to Iron-Porphyrin Catalytic Amendments.

2010

Intensive agricultural practices strongly increase CO2 emission from soil. Synthetic metal-porphyrins were shown to significantly decreased CO2 emission from soil due to an in-situ catalysis of oxidative polymerization of soil organic matter. This research aimed to assess the effects of iron-porphyrin (POR) amendments on soil microbial communities in three arable soils under wheat and maize cropping located in Naples, Turin and Piacenza, characterized by different pedological and climatic conditions. Bulk-soil and rhizo-soil were sampled during 4 years and the microbial groups directly involved in organic matter (OM) mineralization and in key processes of the nitrogen cycle were examined. M…

Predicting stiffness and strength of birch pulp:Polylactic acid composites

2016

This paper studies failure of birch pulp–polylactic acid composites. Stiffness and strength are calculated using the theory of short fibre composites and the results are compared to experimental data. The results differed from the experimental values by 0–6%. With less aligned fibres the short fibre theory is not feasible. The performance of the 40 wt% birch pulp – polylactic acid composite is predicted with X-ray microtomography based finite element modelling, and the results are compared with experiments. Stiffness results differed from experiments by 1–17% . By adding into the models a third material phase representing the interface between the fibres and the matrix, the stress–strain c…

Determination of metal concentrations in certified plastic reference materials after small-size autoclave and microwave-assisted digestion followed w…

2017

Abstract The digestion methods for the determination of As, Cd, Cr, Pb, Sb, Sn and Zn concentrations in plastic samples using microwave-assisted digestion (MW-AD) and small-size autoclave digestion was developed. The certified polyethylene, polypropylene, polyvinyl chloride and acrylonitrile butadiene styrene certified reference materials were used in order to find digestion method working properly for several sample matrices. Efficiency of the digestion methods was evaluated by analyzing the residual carbon in digests by TOC analyzer. MW-AD using a mixture of 7 mL of HNO 3 and 3 mL of H 2 O 2 as a digestion solution resulted in excellent recoveries for As, Cd, Pb, Sb and Zn, and were in th…

Meaningful Work Protects Teachers’ Self-Rated Health under Stressors

2020

A sense of meaningfulness is one of the most sought?after work characteristics which has been associated with employees’ well-being. This study explored whether meaningful work enhances self-rated health in challenging work context, under the stressors of distractions, unnecessary tasks, and unreasonable tasks. Data was collected from Finnish teachers (N = 1,658) and structural equation modelling was employed with the latent interaction terms. Results showed that meaningful work was associated with better self-rated health and the stressors were associated with poorer self-rated health. Protective potential of meaningful work against stressors was also discovered, as meaningful work mitigat…

No evidence for associations between brood size, gut microbiome diversity and survival in great tit (Parus major) nestlings

2022

Abstract Background The gut microbiome forms at an early stage, yet data on the environmental factors influencing the development of wild avian microbiomes is limited. As the gut microbiome is a vital part of organismal health, it is important to understand how it may connect to host performance. The early studies with wild gut microbiome have shown that the rearing environment may be of importance in gut microbiome formation, yet the results vary across taxa, and the effects of specific environmental factors have not been characterized. Here, wild great tit (Parus major) broods were manipulated to either reduce or enlarge the original brood soon after hatching. We investigated if brood siz…