Search results for " GAS"

Pepsinogēna un gastrīna-17 nozīme autoimūna gastrīta diagnostikā

2015

Ievads: AG ir pārāk reti diagnosticēts stāvoklis ar augstu KV attīstības risku. Ilgstošas asimptomātiskas gaitas dēļ to ir grūti diagnosticēt, tāpēc nepieciešamas jaunas, efektīvas un mazāk invazīvas diagnostikas metodes. Mērķis: Darba mērķis ir analizēt seruma biomarķieru (pepsinogēns, G-17) nozīmīgumu AG diagnostikā. Materiāli un metodes: Pētījuma modelis ir nejaušās izlases princips, iekļaujot pacientus, kuri laika periodā no 2004. - 2014. gadam Gremošanas veikuši augšējā gastrointenstinālā trakta endoskopiju. Lai izmērītu seruma biomarķieru (pepsinogēns un G-17) līmeni, pacientiem tika ņemti asins paraugi. Balstoties uz Sidnejas klasifikāciju, tika ņemtas biopsijas. Rezultāti: Pētījumā …

Etiological factors of chronic hepatitis in Italy: a 2014 national survey.

2017

Background The last Italian prevalence survey on chronic hepatitis (CH) conducted in 2001 showed that the hepatitis C virus (HCV) was the main agent associated with CH. Aim The aim of this study was to evaluate epidemiological changes in CH occurring after 13 years. Patients and methods Enrollment of 1392 CH consecutive patients referred to 16 Italian liver units in 2014 scattered all over the country (four in the North, four in the Center, four in the South, and four in the Islands) was performed. Results The mean age of the patients was 58.3 years, with a sex ratio (male/female) of 1.5. HCV infection (also with other etiologies) continues to be the most prevalent etiology (58.1%). However…

MBOAT7 locus rs641738 variant predisposes to hepatocellular carcinoma in nonalcoholic fatty liver

2016

Liver stiffness quantification in biopsy-proven nonalcoholic fatty liver disease patients using shear wave elastography in comparison with transient …

2021

Purpose: This study prospectively assessed the performance of liver stiffness measurements using point shear-wave elastography (p-SWE) in comparison with transient elastography (TE) in patients with biopsy-proven nonalcoholic fatty liver disease (NAFLD). Methods: Fifty-six consecutive adult patients with a histological diagnosis of NAFLD prospectively underwent TE and p-SWE on the same day. The median of 10 measurements (SWE-10), the first five (SWE-5), and the first three (SWE-3) measurements were analyzed for p-SWE. Liver biopsy was considered as the reference standard for liver fibrosis grade. Receiver operating characteristic (ROC) curves and areas under the ROC curves (AUROCs) were cal…

Gas emissions from five volcanoes in northern Chile and implications for the volatiles budget of the Central Volcanic Zone

2014

This study performed the first assessment of the volcanic gas output from the Central Volcanic Zone (CVZ) of northern Chile. We present the fluxes and compositions of volcanic gases (H2O, CO2, H2, HCl, HF, and HBr) from five of the most actively degassing volcanoes in this region—Láscar, Lastarria, Putana, Ollagüe, and San Pedro—obtained during field campaigns in 2012 and 2013. The inferred gas plume compositions for Láscar and Lastarria (CO2/Stot = 0.9–2.2; Stot/HCl = 1.4–3.4) are similar to those obtained in the Southern Volcanic Zone of Chile, suggesting uniform magmatic gas fingerprint throughout the Chilean arc. Combining these compositions with our own UV spectroscopy measurements of …

MAFLD vs NAFLD: Let the contest begin!

2020

Effects of reduced pH on shell integrity of a common whelk from a natural undersea CO2 vent community off Vulcano Island, Italy.

2014

Hexaplex trunculus is a widespread Mediterranean gastropod mollusc that plays a crucial role in benthic ecosystem dynamics. Individuals occur in shallow, sublittoral habitats near Vulcano Island, Italy, where an undersea CO2 vent provides a gradient of seawater acidification mimicing future predicted levels of ocean acidification. Individuals were collected from three sites with declining pH [ambient ( pH 8.18), medium (pH 8.05) and low (pH 7.49)]. Dissolution of shells was clearly evident at the medium (smoothing of outer shell ) and low (pitting and holes) pH sites. Scanning electron microcroscopy will provide a qualitative comparative assessment of micro-scale impacts of shell dissolutio…

Ražošanas izmaksas un faktori, kas tās ietekmē, galvenokārt naftas un gāzes uzņēmumos Uzbekistānā

2021

Produkta cenu veidošanās ķēdē vissvarīgākā un būtiskākā loma ir ražošanas izmaksām, tas ir sākumpunkts, kur sākas produkta cenas veidošanās, kas cenu noteikšanā iet cauri tālākiem posmiem, līdz nonāk nonācēju rokās. klients vai patērētājs. Kā tādu nevar uzsvērt nozīmi, kāda ir ražošanas izmaksām un faktoriem, kas tās ietekmē. Uzņēmumi ražošanas izmaksu aprēķināšanai izmanto dažādus modeļus atkarībā no nozares, uzņēmuma lieluma, ieguldījumiem un vēlamajiem rezultātiem. Tā kā naftas un gāzes nozare ir ļoti specializēta un reti korelē ar citām nozarēm, šis pētījums izvirzīja mērķi izpētīt ražošanas izmaksu veidošanas veidu, izmantojot vienu no naftas un gāzes uzņēmumiem. Šajā darbā tika veikts…

Asymmetric Organocatalytic Synthesis of 4-Aminoisochromanones via a Direct One-Pot Intramolecular Mannich Reaction

2016

Synthesis 48(24), 4451 - 4458(2016). doi:10.1055/s-0035-1562522

Recent progress in metal-organic frameworks (MOFs) for CO2 capture at different pressures

2022

Global climate change ensued by the rise in atmospheric CO2 levels is one of the greatest challenges our planet is facing today. This worldwide distress demands technologies that can contribute to our society toward “negative carbon emissions”. Carbon capture and storage (CCS) technologies are in in important role for capturing CO2 from existing emission sources, such as industrial and energy production point sources, before new more prominent modifications to the energy infrastructure can be implemented. Recently, alongside point source capture, direct air capture (DAC) processes have emerged as highly sought-after technologies that are able to capture CO2 from the ambient air. Alongside t…