93 research outputs found
Spatial planning and ecological networks in Serbia
The paper explains the importance and role of spatial planning in the context of the preservation and sustainable use of ecological networks. The concept of ecological networks is presented in terms of its main goals, structure, functions and approaches to biodiversity conservation. The paper gives an overview of ecological network development in Serbia, but also an overview of the activities carried out in establishing the NATURA 2000 European ecological network. Possibilities for improving the spatial planning process in light of the functional development of ecological networks in Serbia are indicated through an analysis of the requirements arising from the policies relevant for spatial planning and the development of ecological networks using the example of drawn up spatial plans
Does SAQ training improve the speed and flexibility of young soccer players? A randomized controlled trial
The aim of this study was to determine the effects of a 12-week speed, agility and quickness (SAQ) training program on speed and flexibility in young soccer players. One hundred and thirty-two soccer players were randomly assigned to experimental (EG; n = 66, MeanĀ±SD: age: 18.5 Ā± 0.4 years (range 17-19 years); body mass: 71.30 Ā± 5.93 kg; stature: 177.2 Ā± 6.5 cm) and control groups (CG; n = 66, MeanĀ±SD: age: 18.6 Ā± 0.6 years (range 17-19 years); body mass: 70.63 Ā± 4.87 kg; stature: 175.9 Ā± 5.7 cm). The experimental group performed SAQ training whilst the control group undertook straight-line sprint training matched for volume and duration. Sprint performance was assessed using 5 m and 10 m sprints and a further test including maximal speed, a 20 m sprint. Flexibility was assessed using sit and reach, V-sit and reach, leg lift from supine position and lateral leg lift while lying on the side tests. Sprints over 5, 10 and 20 m did not differ between groups at baseline, but by week 12, the 5 m sprint had significantly improved (P 0.05) for all flexibility tests were found between experimental and control group at baseline and after the training programmes. Consequently SAQ training was found to be an effective way of improving sprint time for short distances over 5 and 10 m but not over 20 m (where maximum speed was achieved) or flexibility. These results indicate that SAQ training may be more effective for improving sprint performance for some soccer players but more research is required to determine ideal training methods for improving acceleration and flexibility in young soccer players
Influence of maternal dexamethasone treatment on morphometric characteristics of pituitary GH cells and body weight in near-term rat fetuses.
Growth hormone (GH) and glucocorticoids have a powerful influence on controlling fetal growth, differentiation and maturation of numerous tissues. In the present study, the effect of maternal dexamethasone (Dx) treatment on GH cells and body weight in 19- and 21-day-old rat fetuses was investigated using immunocytochemical and morphometric methods. Pregnant female rats received daily injections of 1.0-0.5-0.5 mg Dx/kg b.w. on days 16-18 of pregnancy (experimental group), while the control group received an equal volume of saline. Dx treatment of pregnant rats enhanced immunostaining intensity and significantly increased (
Hydrocarbons at the Vojvoda Stepa oil drilling sites
The objective of this study was to assess the effect of oil drilling waste on
the environment. This paper reviews the results of analyses of sotl and ground water
taken from the two oil-drilling sites situated near the Vojvoda Stepa village tn eastern
part of Banat region. A total of 29 soil samples and 5 surface and ground water samples have been analyzed.
In the location of Vojvoda Stepa | (VS1) and Vojvoda Stepa 2 (VS2) total petroleum
hydrocarbons (TPH) ranged from 1, 54 g/kg to 5, 98 g/kg and 6, 26 g/kg to SS, 94 g/ke
respectively. The soils in the location VS2 should be adequately recultivated in order tt
lower the TPH to the aceptable level of 2. 5 ofke.
TPH concentrations in water ranged from 6,8 mg/d? to 44, 3 myfdm. The methoc
detection limit for water was 5 mg/dnv. US standards for ground water specify that the
water more than 100 m away from a possible source of potable walter may Contain it}
to 50 mgldne af TPH, while the water potentially usable for water supply should no
have more than | mg/dmā of TPH (CERL Special Report, 2000). If we apply this stan
dard, there is no risk for water supply since there are no settlements near the analyzec
sites
The effect of ovariectomy on thyroid c cells of adult rats
The structure and function of C cells of adult female rats after ovariectomy (Ovx) were investigated. Intact control and Ovx rats were i.p. treated with sterile olive oil for 4 weeks. Peroxidase-antiperoxidase (PAP) immunohistochemical procedure was applied to localize calcitonin (CT) in thyroid C cells while its serum content was determined by RIA method. Morphometric analyses of the C cells volume, that of their nuclei and relative volume density included stereological method with the multipurpose test system M42. Also, the average number of C cells number per mm2 was calculated. Ovx led to a significant increase in body weight (21%; p<0.005). At the same time the C cells of Ovx rats had a significantly decreased cell volume (13%; p<0.005) and their number per mm2 was increased by 59% (p<0.001) in comparison with the controls. Ovx resulted in reduction of serum CT level by 45% comparing to the corresponding controls. Based on these data it can be concluded that Ovx inhibits both the structure and function of the C cells.U ovom radu ispitivana je struktura i funkcija C Äelija adultnih ženki pacova posle ovarijektomije (Ovx). Intaktne kontrolne i Ovx životinje su tretirane i.p. sterilnim maslinovim uljem u trajanju od Äetiri nedelje. Za lokalizaciju kalcitonina (CT) u C Äelijama Å”titaste žlezde koriÅ”Äena je imunohistohemijska metoda peroksidaze- antiperoksidaze (PAP). Nivo CT-a u serumu odreÄen je RIA metodom. Morfometrijska ispitivanja volumena C Äelija, njihovih jedara i relativne volumenske gustine Äelija vrÅ”ena su viÅ”enamenskim testnim sistemom M42. TakoÄe je izraÄunat broj C Äelija po mm2. StatistiÄka obrada podataka vrÅ”ena je Studentovim t-testom. Posle Ovx-a telesna masa životinja znaÄajno je poveÄana za 21% (p<0.005). Volumen C Äelija Ovx pacova znaÄajno je smanjen za 13% (p<0.005), njihov broj po mm2 poveÄan za 59% (p<0.001), a nivo CT-a u serumu smanjen za 45% u poreÄenju sa intaktnom kontrolom. Na osnovu dobijenih rezultata možemo zakljuÄiti da Ovx deluje inhibitorno na strukturu i funkciju C Äelija Å”titaste žlezde kod pacova
Effects of intracerebroventricularly administered octreotide on gonadotrophic cells in female rats
Effects of intracerbroventricularly (ICV) administered octreotide on gonadotrophic cells (FSH and LH) of adult Wistar female rats were examined by immunocytochemical and morphometric methods. The animals received ICV three 1.0 mg doses of octreotide dissolved in 10 mL saline every second day. The controls were treated with equivalent volume of physiological saline by the same schedule. FSH- and LH-producing cells were examined using peroxidase-antiperoxidase immunocytochemical procedure. Morphometric and stereologic examinations were performed to evaluate changes in the number, volume and volume densities of gonadotrophic cells. In females treated with octreotide, the gonadotrophic cells were smaller and often pycnotic, while the number of FSH- and LH-immunopositive cells per unit area (mm2) was significantly reduced. Octreotide also induced a significant reduction of the FSH- and LH-immunoreactive cells volume, as well as of their volume densities. On the basis of these results it can be concluded that octeotride, centrally administered to adult female rats provokes changes in immunocytochemical and morphometric features of both types of gonadotrophic cells.Ispitivani su efekti oktreotida davanog intracerebroventrikularno (ICV) odraslim ženkama pacova na gonadotropne Äelije (FSH i LH). Životinje su tretirane sa ukupno tri doze od 1 mg oktreotida rastvorenog u 10 mL fizioloÅ”kog rastvora svakog drugog dana. Kontrole su na isti naÄin primile odgovarajuÄu zapreminu fizioloÅ” kog rastvora. FSH i LH Äelije su ispitivane imunocitohemijskim postupkom peroksidaza-antiperoksidaza. Da bi se ustanovile promene u broju, zapremini i zapreminskoj gustini gonadotropnih Äelija primenjen je morfometrijski kao i stereoloÅ”ki pristup. Kod ženki tretiranih oktreotidom, gonadotropne Äelije su bile manje i Äesto piknotiÄ ne. Broj imunopozitivnih FSH i LH Äelija po jedinici povrÅ”ine (mm2) je bio statistiÄki znaÄajno smanjen. Oktreotid je, takodje, izazvao znaÄajno smanjenje zapremine FSH i LH imunoreaktivnih Äelija, kao i njihove zapreminske gustine. Na osnovu ovih rezultata, može se zakljuÄiti da je oktreotid, dat ICV odraslim ženkama pacova doveo do promena imunocitohemijskih i morfometrijskih osobina oba ispitivana tipa gonadotropnih Äelija
Yttrium Orthoferrite Powder Obtained by the Mechanochemical Synthesis
Yttrium orthoferrite (YFeO3) powder was prepared by a mechanochemical synthesis from a mixture of Y2O3 and alpha-Fe2O3 powders in a planetary ball mill for 2.5 h. The obtained YFeO3 powder sample was characterized by X-ray diffraction (XRD), Raman and infrared spectroscopy. The average crystallite size calculated by the Scherrer equation was 12 nm. The Mossbauer spectroscopy at room temperature confirms the superparamagnetic character of YFeO3 orthoferrite sample
The effect of ovariectomy on thyroid c cells of adult rats
The structure and function of C cells of adult female rats after ovariectomy (Ovx) were investigated. Intact control and Ovx rats were i.p. treated with sterile olive oil for 4 weeks. Peroxidase-antiperoxidase (PAP) immunohistochemical procedure was applied to localize calcitonin (CT) in thyroid C cells while its serum content was determined by RIA method. Morphometric analyses of the C cells volume, that of their nuclei and relative volume density included stereological method with the multipurpose test system M42. Also, the average number of C cells number per mm2 was calculated. Ovx led to a significant increase in body weight (21%; p<0.005). At the same time the C cells of Ovx rats had a significantly decreased cell volume (13%; p<0.005) and their number per mm2 was increased by 59% (p<0.001) in comparison with the controls. Ovx resulted in reduction of serum CT level by 45% comparing to the corresponding controls. Based on these data it can be concluded that Ovx inhibits both the structure and function of the C cells.U ovom radu ispitivana je struktura i funkcija C Äelija adultnih ženki pacova posle ovarijektomije (Ovx). Intaktne kontrolne i Ovx životinje su tretirane i.p. sterilnim maslinovim uljem u trajanju od Äetiri nedelje. Za lokalizaciju kalcitonina (CT) u C Äelijama Å”titaste žlezde koriÅ”Äena je imunohistohemijska metoda peroksidaze- antiperoksidaze (PAP). Nivo CT-a u serumu odreÄen je RIA metodom. Morfometrijska ispitivanja volumena C Äelija, njihovih jedara i relativne volumenske gustine Äelija vrÅ”ena su viÅ”enamenskim testnim sistemom M42. TakoÄe je izraÄunat broj C Äelija po mm2. StatistiÄka obrada podataka vrÅ”ena je Studentovim t-testom. Posle Ovx-a telesna masa životinja znaÄajno je poveÄana za 21% (p<0.005). Volumen C Äelija Ovx pacova znaÄajno je smanjen za 13% (p<0.005), njihov broj po mm2 poveÄan za 59% (p<0.001), a nivo CT-a u serumu smanjen za 45% u poreÄenju sa intaktnom kontrolom. Na osnovu dobijenih rezultata možemo zakljuÄiti da Ovx deluje inhibitorno na strukturu i funkciju C Äelija Å”titaste žlezde kod pacova
Effects of intracerebroventricularly administered octreotide on gonadotrophic cells in female rats
Effects of intracerbroventricularly (ICV) administered octreotide on gonadotrophic cells (FSH and LH) of adult Wistar female rats were examined by immunocytochemical and morphometric methods. The animals received ICV three 1.0 mg doses of octreotide dissolved in 10 mL saline every second day. The controls were treated with equivalent volume of physiological saline by the same schedule. FSH- and LH-producing cells were examined using peroxidase-antiperoxidase immunocytochemical procedure. Morphometric and stereologic examinations were performed to evaluate changes in the number, volume and volume densities of gonadotrophic cells. In females treated with octreotide, the gonadotrophic cells were smaller and often pycnotic, while the number of FSH- and LH-immunopositive cells per unit area (mm2) was significantly reduced. Octreotide also induced a significant reduction of the FSH- and LH-immunoreactive cells volume, as well as of their volume densities. On the basis of these results it can be concluded that octeotride, centrally administered to adult female rats provokes changes in immunocytochemical and morphometric features of both types of gonadotrophic cells.Ispitivani su efekti oktreotida davanog intracerebroventrikularno (ICV) odraslim ženkama pacova na gonadotropne Äelije (FSH i LH). Životinje su tretirane sa ukupno tri doze od 1 mg oktreotida rastvorenog u 10 mL fizioloÅ”kog rastvora svakog drugog dana. Kontrole su na isti naÄin primile odgovarajuÄu zapreminu fizioloÅ” kog rastvora. FSH i LH Äelije su ispitivane imunocitohemijskim postupkom peroksidaza-antiperoksidaza. Da bi se ustanovile promene u broju, zapremini i zapreminskoj gustini gonadotropnih Äelija primenjen je morfometrijski kao i stereoloÅ”ki pristup. Kod ženki tretiranih oktreotidom, gonadotropne Äelije su bile manje i Äesto piknotiÄ ne. Broj imunopozitivnih FSH i LH Äelija po jedinici povrÅ”ine (mm2) je bio statistiÄki znaÄajno smanjen. Oktreotid je, takodje, izazvao znaÄajno smanjenje zapremine FSH i LH imunoreaktivnih Äelija, kao i njihove zapreminske gustine. Na osnovu ovih rezultata, može se zakljuÄiti da je oktreotid, dat ICV odraslim ženkama pacova doveo do promena imunocitohemijskih i morfometrijskih osobina oba ispitivana tipa gonadotropnih Äelija
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