Search results for "EFE"

Intra-individual variability in TSH levels of healthy women during the first half of pregnancy

2017

TSH is the parameter most widely accepted to assess thyroid function, especially in pregnant women. The aim of this current study was to analyze intra-individual changes in TSH during the first half of pregnancy in women with TSH levels higher than 2.5mIU/L in early pregnancy.An observational, prospective study was conducted on 243 healthy pregnant women in the first trimester of pregnancy. Thyroid function was assessed by testing TSH and free T4 levels. A subgroup of women with TSH levels2.5mIU/L underwent additional tests (TSH, free T4, peroxidase antibodies). Information on dietary iodine intake and/or iodine supplements was also recorded.Mean TSH level was 1.89mIU/L (range 0.024-6.48mIU…

Changes in the motility patterns of spermatozoa from the rabbit epididymis as assessed by computer-aided sperm motion analysis

1996

Sperm maturation in the epididymis includes changes in their potential for motility that enables spermatozoa to reach the egg and penetrate its investments. The motility characteristics of spermatozoa from the testis, the epididymis, and vas deferens of the rabbit were investigated by computer-assisted sperm analysis (CASA). Various forms of motility were displayed by sperm from different regions of the epididymis released into incubation medium. Testicular sperm were motile, although nonprogressive. The maximum percentage motility was expressed by sperm in the proximal cauda epididymidis, and forward progression was developed by spermatozoa from the distal caput. Once forward progression w…

Method optimization to measure polybrominated diphenyl ether (PBDE) concentrations in soils of Bratislava, Slovakia.

2010

We modified an analytical method to determine polybrominated diphenyl ethers (PBDEs) in urban soils of Bratislava (Slovakia). Gel permeation chromatography (GPC) introduced as a clean-up step for soil extracts substantially reduced matrix enhancements when PBDEs were measured with gas chromatography-negative chemical ionization-mass spectrometry (GC-NCI-MS). The resulting method proved to be accurate, precise, and showed low detection limits. The sum of 15 PBDE concentrations in surface horizons of Bratislava soils ranged from 87 to 627 pg g(-1). PBDE concentrations were mostly higher in surface than deeper horizons probably because of atmospheric deposition and lack of substantial vertical…

Sperm morphological abnormalities appearing in the male rabbit reproductive tract

1996

The role of the excurrent duct system in producing and/or eliminating morphologically abnormal spermatozoa may modify the semen parameters and interfere with sperm fertilizing capacity. To study this process, changes in the morphology of spermatozoa during their transit through the reproductive tract in sexually mature rabbits were investigated. The incidence of head, midpiece and tail abnormalities as well as of multiple defects in a single spermatozoon, and the position of the cytoplasmic droplet along the sperm midpiece were evaluated in samples from the testis, 6 regions of the epididymis and the vas deferens. Spermatozoa were characterized by rapid migration of the cytoplasmic droplet …

Effect of Cetrorelix on sperm morphology during migration through the epididymis in the cynomolgus macaque (Macaca fascicularis)

2000

The importance of the cynomolgus monkey as a model for human reproductive medicine prompted this examination of epididymal sperm morphology. Computer-aided sperm morphological analysis was used for the first time to provide morphometric data on sperm heads as they traversed the epididymal duct of Macaca fascicularis. The duct was divided into six regions, starting close to the testis (proximal) and ending close to the vas deferens (distal). To determine the androgen-dependence of the changes, one group of animals received a GnRH-antagonist (Cetrorelix, Asta Medica, Frankfurt, Germany) to induce testicular regression and lower epididymal androgens, while a control group received only vehicle…

Wykorzystanie energii wiatru występującego w warstwie przygruntowej oraz architektonicznej

2016

W pracy przedstawiono wyniki analiz możliwości wykorzystania energii wiatru za pomocą mikro turbin wiatrowych. Przeanalizowano możliwość wykorzystania energii wiatru występującego w warstwie przygruntowej oraz architektonicznej. Zaproponowano zastosowanie układu mikroelektrowni wiatrowej o mocy 2 kW na potrzeby pojedynczego gospodarstwa domowego.Określono opłacalność zastosowania tego typu mikroelektrowni w warunkach wietrzności panujących w Opolu.

Latvijas makroekonomiskās attīstības scenāriju un prognožu novērtējums, lai izvērtētu Eiropas Komisijas pārskatīto energoefektivitātes un atjaunoto e…

2021

Nodevums projekta “Klimata mērķu ekonomiskās ietekmes modelēšana un analīze” ietvaros.

Riferibilità dei contatori statici di energia reattiva in presenza di armoniche. Evoluzione normativa e prove sperimentali

2013

Traceability of static reactive energy meters in the presence of harmonics: theoretical considerations and a DAQ-based reference meter

2013

This paper deals with some problems related to the measurements traceability with static meters for reactive energy. These problems arise when the meters operate in the presence of harmonics, which can negatively affect their performances, depending on implemented metric. The paper analyzes the problem in the light of both in-force and draft standards, from the viewpoint of the performances of both commercial meters and reference standard instruments. The analysis is supported by some experimental tests, which are carried out by means of a reference meter, based on data acquisition boards, which can be used in both sinusoidal and distorted conditions.

Enerģijas sektora integrēta attīstības plānošana Latvijas pašvaldību teritorijās

2015

Enerģija ir galvenais virzītājspēks, uz kuru tiek balstīta preču un pakalpojumu nodrošināšana visās tautsaimniecības nozarēs – lauksaimniecībā, rūpniecībā (ieguve, ražošana), transportā, u.c. Enerģijas nozares plānošana gan valsts, gan pašvaldības līmenī ir svarīgs instruments, lai apzinātu esošo situāciju un plānotu nozares attīstību ilgtermiņā. Maģistra darba mērķis ir izstrādāt priekšlikumus sektorālās plānošanas integrācijai Latvijas teritorijas plānošanas dokumentos, par piemēru ņemot enerģijas sektora integrāciju. Maģistra darba ietvaros tika apkopota ar tēmu saistītā zinātniskā literatūra, pētīti ārvalstu piemēri un esošās situācija valstī, kā arī tika veiktas nozares speciālistu un …