Temat: reproductive activity - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Hormonal regulation of cephalopod reproduction in the light of comparative endocrinology of invertebrates
Autorzy:: Pokora, Z.
Powiązania:: https://bibliotekanauki.pl/articles/83779.pdf
Data publikacji:: 1999
Wydawca:: Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:: hormonal regulation
cephalopod
animal reproduction
endocrinology
invertebrate
reproductive activity
gametogenesis
neurohormone
Źródło:: Folia Malacologica; 1999, 07, 4
1506-7629
Pojawia się w:: Folia Malacologica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Thyroid hormones in the cerebrospinal fluid of the third ventricle of adult female sheep during different periods of reproductive activity
Autorzy:: Skipor, J.
Misztal, T.
Szczepkowska, A.
Powiązania:: https://bibliotekanauki.pl/articles/30646.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: thyroid hormone
cerebrospinal fluid
ventricle
adult
female
sheep
reproductive activity
reproductive period
ewe
thyroxine
triiodothyronine
breeding season
anoestrus
Opis:: Thyroid hormones (THs) are obligatory for transition from breeding season to anestrus in sheep. In this process, THs act during a very limited time of the year and primarily within the brain. In ewes chronically equipped for sampling cerebrospinal fluid (CSF) from the third ventricle, we have characterized the concentrations of total and free thyroxine (T4), triiodothyronine (T3), and total reverse T3 (rT3) in the CSF during breeding season, anestrus and during a critical period required for transition to anestrus (December-March). The total T4, T3, rT3 and free T3 average concentrations (± SEM) in CSF were 1.5 ± 0.07 ng/ml, 14.5 ± 1.2 pg/ml, 43 ± 7.4 pg/ml, and 0.6 ± 0.05 pg/ml, respectively, and all were significantly lower (p < 0.001) than in blood plasma except free T4 (12.6 ± 1.1 pg/ml), which was similar to that in plasma. There was a seasonal trend (p < 0.05) in the concentration of total T3 (highest in December) and free T4 (highest in November) in the CSF that does not follow that in blood plasma. During the period of transition to anestrus the CSF total T3/TT4 molar ratio and free T3/ T4 ratio were significantly lower (p < 0.05 and p < 0.01, respectively) than in blood plasma, while the total rT3/T4 ratio was significantly higher (p < 0.01) at the end of this period (March). Additionally, the CSF total rT3 concentrations were also significantly correlated with the CSF total T4 levels (r = 0.57; p < 0.05). In conclusion, the CSF in sheep may serve as a considerable source of thyroid hormones for neuroendocrine events. The lack of significant changes in THs concentrations in the CSF during the period of transition to anestrus indicate that neither seasonal changes of THs circulating in the blood plasma nor THs circulating in the CSF actively drive the transition to anestrus.
Źródło:: Polish Journal of Veterinary Sciences; 2010, 13, 4
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effects of three pesticides on superoxide dismutase and glutathione-S-transferase activities and reproduction of Daphnia magna
Autorzy:: Song, Y.
Chen, M.
Zhou, J.
Powiązania:: https://bibliotekanauki.pl/articles/204826.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: enzyme activity
reproductive parameter
pesticide
Daphnia magna
Opis:: Applying pesticides to crops is one of the causes of water pollution by surface runoff, and chlorpyrifos, trifluralin and chlorothalonil are used respectively as insecticide, herbicide and fungicide for crop plants widely. To explore effects of three pesticides on aquatic organisms, superoxide dismutase (SOD) and glutathione S-transferase (GST) activities were determined after 24 h and 48 h exposure of D. magna with ages of 6–24 h to several low concentrations of chlorpyrifos (0.36, 0.72, 1.43, 2.86, 5.72 μg∙L⁻¹), trifluralin (0.17, 0.33, 0.66, 1.33, 2.65 mg∙L⁻¹) and chlorothalonil (0.09, 0.18, 0.36, 0.72, 1.43 mg∙L⁻¹) respectively. Main reproductive parameters including first pregnancy time, first brood time, the number of first brood and total fecundity after 21 d exposures at the same concentrations of pesticides as described above were also measured. The results showed that the activities of GST increased in lower concentrations and decreased in higher concentrations after 24 h exposure to three pesticides, respectively. The activities of SOD showed the same changes after 48 h exposure. With the time prolonged, the activities of GST decreased while the activities of SOD increased. After 21 d exposure, the first pregnancy time and first brood time were delayed, while the number of the first brood and total fecundity per female decreased with increasing concentrations. These results corroborated that GST activity was more sensitive to those pesticides than SOD activity, and there was a significant relationship between total fecundity and pesticides-dose(r>0.94, n=6), GST activity after 48 h exposure and total fecundity after 21 d exposure (r>0.92, n=6).
Źródło:: Archives of Environmental Protection; 2017, 43, 1; 80-86
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Effect of Raw Extract of Clitoria ternatea L. on Sexual Stimulate Test of Female Genital Tract in Rat
Autorzy:: Chandru, G.
Jayakumar, Kaliyamoorthy
Girija, M.
Powiązania:: https://bibliotekanauki.pl/articles/1178251.pdf
Data publikacji:: 2018
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Clitoria ternatea
Estrogenic activity
Female rat
Hematological and Biochemical profile
Reproductive stimuli
Opis:: Clitoria ternatea have no toxicity as per the earlier reports of sexual stimulate effect of traditional medicine used by the tribal and fishery village women’s of Point Calimere Wildlife Sanctuary, Nagapattinam district, Southern India. In the present study, reproductive stimuli and fertility effect of raw extract of Clitoria ternatea (RECT) was administered orally at the doses of 250 mg/kg body weight of female rat for a period of 30 days and normal clean water (Normal slain 0.9%, 0.5 ml/kg per day) to control groups. There were no significance changes in the body weight of RECT treated group when compared to control group. RECT treated female rat group vigorously mated with male when allowed on estrus phase of female rat observed in vaginal smears. The serum estradiol level was increased (P < 0.05) significantly. Administered the RECT showed no significant change in the biochemical parameters and hematological parameters of RBC, WBC count when compared to control group. It is concluded that the test of RECT could be due to its reproductive effect in female rat.
Źródło:: World Scientific News; 2018, 91; 86-98
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Activity of hydrolases in the reproductive system and in consecutive stages of Ascaris suum development
Autorzy:: Dziekońska-Rynko, J.
Powiązania:: https://bibliotekanauki.pl/articles/2146551.pdf
Data publikacji:: 2004
Wydawca:: Polskie Towarzystwo Parazytologiczne
Tematy:: hydrolase
development stage
stage
enzyme
reproductive system
Ascaris suum
hydrolase activity
egg
Opis:: The activity of hydrolases in the eggs isolated from the uterus of A. suum is in most cases similar to that in the reproductive system. The activity of hydrolases was low in the stages of cleavage and gastrulation, and it grew until the larva stage.
Źródło:: Wiadomości Parazytologiczne; 2004, 50, 2; 269-272
0043-5163
Pojawia się w:: Wiadomości Parazytologiczne
Dostawca treści:: Biblioteka Nauki