Search results for "chemical parameters"

Distinct photodynamics of κ-N and κ-C pseudoisomeric iron(ii) complexes

2021

Two closely related FeII complexes with 2,6-bis(1-ethyl-1H-1,2,3-triazol-4yl)pyridine and 2,6-bis(1,2,3-triazol-5-ylidene)pyridine ligands are presented to gain new insights into the photophysics of bis(tridentate) iron(II) complexes. The [Fe(N^N^N)2]2+ pseudoisomer sensitizes singlet oxygen through a MC state with nanosecond lifetime after MLCT excitation, while the bis(tridentate) [Fe(C^N^C)2]2+ pseudoisomer possesses a similar 3MLCT lifetime as the tris(bidentate) [Fe(C^C)2(N^N)]2+ complexes with four mesoionic carbenes. Financial support from the Deutsche Forschungsge-meinschaft [DFG, Priority Program SPP 2102] "Light-controlled reactivity of metal complexes" (BA 4467/7-1, LO 714/11-1, …

Mining extraction in the ocean depths: a baseline to understand and reduce acoustic impact on biodiversity.

2020

[ES] A lo largo de la historia, el hombre ha explotado los recursos minerales de la tierra para su supervivencia y desarrollo tecnológico sin un equilibrio con su regeneración. Dado el crecimiento de la población mundial y la reducción de recursos, el hombre comenzó a buscar nuevos depósitos que se encontraron en la década de 1960 en las profundidades de los océanos. Con estos, la humanidad empezò a pensar en extraer los minerales de estos depósitos y esto llevò al nacimiento de Deep Sea Mining (DSM). Las consecuencias de las actividades mineras en las profundidades del mar no se conocen realmente y los efectos pueden ser diferentes: contaminación acústica, contaminación lumínica, contamina…

Wpływ punktowych źródeł zanieczyszczeń na jakość wód dolnego biegu Nysy Kłodzkiej

2000

Optimal Solutions for the Use of Sewage Sludge on Agricultural Lands

2021

The use of sewage sludge in agriculture decreases the pressure on landfills. In Romania, massive investments have been made in wastewater treatment stations, which have resulted in the accumulation of important quantities of sewage sludge. The presence of these sewage sludges coincides with large areas of degraded agricultural land. The aim of the present article is to identify the best technological combinations meant to solve these problems simultaneously. Adapting the quality and parameters of the sludge to the specificity of the land solves the possible compatibility problems, thus reducing the impact on the environment. The physico-chemical characteristics of the fermented sludge were …

Biochemical adaptations in middle-distance runners: an assessment of blood and anthropometric parameters

2014

In order to understand the mechanism underlying the physiological adaptation of purely aerobic workout, we investigated the effect of 2 months of training on nine males (17-22 year-old) middle distance running agonistic athletes. Blood sample was collected in the morning to analyze: hematological parameters, lipid profile, liver function enzymes [glutamate oxaloacetate transaminase, glutamate pyruvate transaminase, gamma-glutamyl transferase (γ-GT)] and skeletal and myocardial markers of muscle damage [creatin kinase (CK) and creatin kinase MB (CK-MB)]. Endurance training, as it implies high oxygen consumption, should increase reactive oxygen species, but it has been shown that exercise lea…

Estudio experimental comparado de marcadores bioquímicos en la infección por Fasciola hepatica y F. gigantica

2017

Fascioliasis is caused by the genetically and phenotypically very close Fasciola hepatica and F. gigantica. The latter, always considered secondary in human infection, appears nowadays increasingly involved in human endemic areas of Africa and Asia. Unfortunately, little is known about the pathogenicity of this liver fluke species, mainly due to difficulties assessing the moment of a patient's infection in the anamnesis and in the differential diagnosis with F. hepatica. This is the first experimental study comparing F. hepatica and F. gigantica in a long-term study of up to 24 weeks with genotypically and phenotypically standardised fluke strains in the same animal model host, the Guirra s…

Ocena mikrobiologiczna niepasteryzowanych soków owocowych i warzywnych

2017

Celem pracy była ocena parametrów fizykochemicznych oraz mikrobiologicznych niepasteryzowanych soków owocowych i warzywnych podczas próby przechowalniczej. Analizie poddano takie parametry fizykochemiczne, jak: pH, kwasowość ogólną, gęstość względną oraz zawartość ekstraktu. W badaniach mikrobiologicznych określono ilość mikroorganizmów oraz przeprowadzono ocenę jakościową badanych soków. Przetrzymywanie otwartych soków przez jedną godzinę w temperaturze pokojowej nie wpłynęło istotnie na zmianę parametrów fizykochemicznych. W trakcie badań odnotowano wzrost ogólnej liczby drobnoustrojów, stwierdzono obecność bakterii grupy coli oraz bakterii rodzaju Pseudomonas. Nie stwierdzono obecności S…