Search results for "bulk"
showing 6 items of 286 documents
Compost Amendment Impact on Soil Physical Quality Estimated from Hysteretic Water Retention Curve
2022
Capacity-based indicators of soil physical quality (SPQ) and pore distribution parameters were proposed to assess the effects of compost amendment but their determination was limited to desorption water retention experiments. This study also considered the pore size distribution obtained from adsorption experiments to establish the effectiveness of compost amendment in modifying the physical and hydrological attributes of a sandy loam soil. Repacked soil samples with different compost to soil ratios, r, were subjected to a wetting–drying cycle, and the water retention data were fit to the van Genuchten model to obtain the pore volume distribution functions. The soil bulk density was m…
Luminescence Properties of Non Bridging Oxygen Hole Centers at a Silica Surface
2008
Carbon nanotube derivatives for electro-optical active bulk heterojunctions
2012
Inferring Phytoplankton, Terrestrial Plant and Bacteria Bulk δ¹³C Values from Compound Specific Analyses of Lipids and Fatty Acids.
2015
Stable isotope mixing models in aquatic ecology require δ13C values for food web end members such as phytoplankton and bacteria, however it is rarely possible to measure these directly. Hence there is a critical need for improved methods for estimating the δ13C ratios of phytoplankton, bacteria and terrestrial detritus from within mixed seston. We determined the δ13C values of lipids, phospholipids and biomarker fatty acids and used these to calculate isotopic differences compared to the whole-cell δ13C values for eight phytoplankton classes, five bacterial taxa, and three types of terrestrial organic matter (two trees and one grass). The lipid content was higher amongst the phytoplankton (…
Composition and corrosion phases of Etruscan Bronzes from Villanovan Age
2008
A neutron diffraction (ND) and neutron tomography (NT) study of laminated ancient bronzes was performed at the ISIS (Rutherford Appleton Laboratory, UK) neutron source and at the BENSC reactor (Hahn-Meitner Institut, Germany). The samples are part of an 8th century BC Etruscan collection discovered in the necropolises of Osteria-Poggio Mengarelli and Cavalupo in the Vulci area (Viterbo, Italy). The study allowed us to derive-in a totally non-destructive manner-information related to the main composition of the objects, possible presence of alterations and their nature, crusts and inclusions, as well as structure of the bulk. The presence of some components is linked to a variety of question…
Hormonus nesekretējošo hipofīzes neiroendokrīno audzēju klasifikācijas izstrāde, izmantojot transkriptomu de novo pielīdzināšanu un datu dimensiju re…
2021
Īso nolasījumu RNS sekvencēšana ir metode, kuru bieži pielieto diferenciāli ekspresēto gēnu noteikšanai. Hipofīzes neiroendokrīnie audzēji jeb PitNET ir galvenokārt labdabīgi audzēji ar dažādu molekulāro izcelsmi un klīniskajā izpausmēm. Līdz šim noteiktas vairākas somatiskās mutācijas (GNAS, USP48, BRAF, USP8) un dažas pārmantojamās (AIP, MEN1, PRKAR1A, GPR101), kas asociētas PitNET veidošanos dažādos klīniskajos kontekstus, taču rezultātus bieži neizdodas replicēt dažādās it kā fenotipiski līdzīgās paraugkopās, kas varētu būt saistīts ar sarežģīto PitNET klasifikāciju. Darbā izmantoti 58 hormonus nesekretējošu PitNET paraugi, kuru RNS sekvencēšanas nolasījumi iegūti no Valsts Iedzīvotāju …