Search results for "Satu"

Sensory adaptation of antennae and sex pheromone-mediated flight behavior in male oriental fruit moths (Leptidoptera: Tortricidae) after prolonged ex…

2013

Sensory adaptation has been measured in the antennae of male Grapholita molesta (Busck) after 15 min of exposure to its main pheromone compound (Z)-8-dodecen-1-yl acetate (Z8-12:OAc) at the aerial concentration of 1 ng/m(3) measured in orchards treated with pheromone for mating disruption. Exposing males to this aerial concentration of Z8-12:OAc for 15 min, however, had only a small effect on their ability to orientate by flight to virgin calling females in a flight tunnel. Experiments were undertaken to determine if exposure to the main pheromone compound in combination with the two biologically active minor compounds of this species, (E)-8-dodecen-1-yl acetate (E8-12:OAc) and (Z)-8-dodece…

Lipid and fatty acid variations inCiona intestinalis ovary after tri-n-butyltin(IV)chloride exposure

2005

Reduction of total lipids (TL) content and significant variations of triglyceride (TG) and phospholipid (PL) fractions were observed as a consequence of exposure of Ciona intestinalis ovaries to tributyltin chloride (TBTCL) solutions. In particular, an evident TG decrease and a PL increase were observed, which probably provoked an increment in membrane fluidity, because of the high concentration of long chain fatty acids and, as a consequence, PL. This could be a cell adaptive standing mechanism towards the pollutants, as observed in Saccharomyces cerevisiae. Also the increase in the content of the polyunsaturated fatty acids (PUFA), important in the synthesis of compounds such as prostagla…

The Respiratory Potential of Oxygen: A New Quantity to Characterize State, Effects and Bio-Availability of the Gas in Organism

1992

A number of quantities are known which enable to characterize the state of oxygen in blood, for instance: the concentration, which means the physically solved mass per volume; or the content, which comprises the whole mass per volume irrespective of the molecular state; or capacity, which is the chemically bound mass of oxygen per volume and, relatively, the saturation, or the oxygen partial pressure. These various quantities may be divided into two types: the mass-related and the not-mass-related ones.

2021

Abstract. Homogeneous freezing of aqueous solution aerosol particles is an important process for cloud ice formation in the upper troposphere. There the air temperature is low, the ice supersaturation can be high and the concentration of ice-nucleating particles is too low to initiate and dominate cirrus cloud formation by heterogeneous ice nucleation processes. The most common description to quantify homogeneous freezing processes is based on the water activity criterion (WAC) as proposed by Koop et al. (2000). The WAC describes the homogeneous nucleation rate coefficients only as a function of the water activity, which makes this approach well applicable in numerical models. In this study…

The use of soil water retention curve models in analyzing slope stability in differently structured soils

2017

Abstract This study analyzes whether and at what rate the parameterization of the Soil Water Retention Curve (SWRC) affects the analysis of shallow slope stability for differently structured unsaturated soils. Advanced empirical or physically-based equations of SWRCs have been proposed in literature to describe soil systems characterized by the so-called bimodal porous domain. In unsaturated soils, SWRC affects the stability assessment in two ways. It influences the resistance properties in terms of shear strengths, which depend on the soil water suction; and it affects the hydrological process modeling (e.g. infiltration) directly influencing soil moisture patterns and indirectly influenci…

Hydro-mechanical behaviour of shot-clay bentonite

2015

Experimental tests were conducted to characterise the hydro-mechanical behaviour of shot-clay MX-80 bentonite. Granular bentonite was mixed continuously with water and shot on the walls of a tunnel section at the Grimsel Underground Research Laboratory (URL), in Switzerland. The shot-clay was placed to create a layer of bentonite in direct contact with the host rock to avoid preferential water and/or gas flow along the tunnel wall. Samples for an experimental programme were collected during the shooting. Results from an experiment, conducted under controlled total suction to analyse the hydro-mechanical behaviour of the material, are shown.

Testing of the hydro-mechanical behaviour of shales.

2016

Shales are among the most commonly considered geomaterials in current energy-related geomechanical investigations, as they are involved in engineering applications such as the unconventional extraction of natural gas, CO2 sequestration and nuclear waste geological storage. A deep understanding of their hydro-mechanical behaviour is of primary significance for such applications. In this paper selected results on the water retention behaviour and on the high pressure oedometric compression behaviour of shales are presented.

Sensitive THM coupled analysis of buffer-rock barriers for nuclear waste storage. In Unsaturated Soil Mechanics from Theory to Practice

2016

The buffer-rock barriers system is widely proved to be one of the most promising options for isolating high-level radioactive waste from the human environment. To certify the efficiency and provide the additional development regarding design and assessment of this barriers system, it is essential to understand the complex Thermo-Hydro-Mechanical (THM) behavior of confining buffer under a variety of environmental conditions. To this end, a case of buffer-rock barriers system is studied using a THM finite element approach. The contributions of different processes, including the vapor diffusion process, the water saturation dependent thermal conductivity and specific heat capacity as well as t…

Informatīvo materiālu ietekme uz pacientu sagatavotību urodinamikas izmeklēšanas metodei

2017

Pētījuma nosaukums “Informatīvo materiālu ietekme uz pacientu sagatavotību urodinamikas izmeklēšanas metodei”. Latvijā no urīna nesaturēšanas jeb patvaļīgas urīna izdalīšanās cieš apmēram 150 000 cilvēku. Statistiskas dati rāda, ka Latvijā urīna nesaturēšana ir sastopama katrai ceturtajai sievietei vecumā virs 35 gadiem (1). Pētījumi liecina, ka Latvijā aptuveni pusei no visiem pacientiem ir tā dēvētā slodzes inkontinence, 43% pacientu nesaturēšana ir jaukta tipa, kamēr 7% urīna nesaturēšanu izraisa pāraktīvs urīnpūslis (pastāvīgi kairināts urīnpūslis, kas var izraisīt pēkšņu un nepārvaramu urīnpūšļa iztukšošanos), to apstiprina īpaša diagnostika – urodinamiskie izmeklējumi (1). Urīna nesat…

Zvaigžņotā Debess: 2005, Rudens

2005

Latvijas Zinātnes padome, Latvijas Universitāte