196,417 research outputs found
Data for: Modelling the 14C bomb-pulse in young speleothems using a soil carbon continuum model.
No full textYarrangobilly (stalagmites HW-S1, HW-S2 and HW_38b), Wellington (stalagmites WB and WC)and Golgotha Cave (stalagmites GL-S1, GL-S2 and GL-S4) 14Cspel. measurements and age estimation. From tip refers to the distance from the tip of stalagmite and mid-point refers to the average between the top and bottom sampling increment (mm). * The value of d13C is assumed and based on the mean measured d13C of the other samples. A measured value was not available. The error refers to the analytical error of 14C analysis. Distance from tip (DFT) measurements with a * indicated represent a calculated F14C used to estimate the IP see section 3.2.1. MID represents the mid-point of the sample relative to DFT. ‘Uncert. SI’ and is the equivalent to the uncertainty of one sample. The total chronological uncertainty estimates from the sampling interval (SI) and the variable growth rate (VGR) is shown in the ‘Total error (y)’ column
Problems of migrants’ acculturation in intercultural education
No full textThe aim of the text is to present – based on the research – various planes of acculturation of the culturally Others (belonging to new groups of migrants) in Polish society. Here have been analyzed the processes of shaping the identity, various types of relationships occurring among migrants in different areas of their lives, their identity and social ties as the possibility of breaking down the barriers in the integration in the process of intercultural learning. The text provides a starting point for the inclusion of acculturation threads to intercultural pedagogy.Ewa Dąbrowa - Akademia Pedagogiki Specjalnej im. M. Grzegorzewskiej w WarszawieUrszula Markowska-Manista - Akademia Pedagogiki Specjalnej im. M. Grzegorzewskiej w Warszawie17/2546
INVESTIGATIONS ON THE ACUTE EFFECTS OF NEUROPEPTIDES ON THE PITUITARY-ADRENOCORTICAL FUNCTION IN NORMAL AND COLD-STRESSED RATS .2. NEUROTENSIN AND NEUROMEDIN-N
No full textThe effects of a subcutaneous bolus injection of 2 micrograms neurotensin (NT) or neuromedin N (NMN) on the function of the hypothalamo-pituitary-adrenocortical axis were investigated in both normal and cold-stressed rats. The blood concentrations of ACTH, corticosterone (B) and aldosterone (ALDO) were measured by specific radioimmunoassays 1, 2 or 4 h after the neuropeptide administration. Cold stress enhanced plasma levels of ACTH, B and ALDO, and these rises lasted unchanged until 4 h. NT did not affect either basal or stress-stimulated plasma levels of ACTH and B, while it lowered the plasma ALDO concentration at 4 h in normal rats and increased it at 1 h in stressed animals. NMN did not change the basal plasma level of ACTH, but it did markedly raise blood levels of both B and ALDO; on the other hand, in cold-stressed rats NMN strongly depressed ACTH response and decreased B plasma concentration at 2 h, without evoking apparent changes in ALDO response. In light of these findings the following conclusions and hypotheses can be drawn and suggested: (i) NT and NMN, when administered at a relatively high dose, do not affect ACTH release in rats under basal conditions; (ii) NMN, but not NT, is able to prevent cold stress-induced stimulation of ACTH secretion, probably by inhibiting hypothalamic thermoregulatory centers; and (iii) NT and NMN exert direct adrenocortical antisecretagogue and secretagogue effects, respectively, which could explain the evident lack of correlation between the levels of circulating ACTH and the plasma concentrations of the main adrenal steroid hormones in both normal and stressed rats after neuropeptide administration
EVIDENCE THAT ENDOGENOUS VASOACTIVE-INTESTINAL-PEPTIDE (VIP) IS INVOLVED IN THE REGULATION OF RAT PITUITARY-ADRENOCORTICAL FUNCTION - IN-VIVO STUDIES WITH A VIP ANTAGONIST
No full textThe effect of a subcutaneous bolus injection of 2 micrograms magnitude of Ac,Tyr1,D-Phe2-GRF(1-29) amide, a specific VIP antagonist (VIP-A), on the hypothalamo-pituitary-adrenocortical (HPA) axis were investigated in both normal and ether- or cold-stressed rats. Blood concentrations of ACTH, aldosterone (ALDO) and corticosterone (B) were measured by specific RIA 1, 2 or 4 h after VIP-A injection. VIP-A administration to normal rats strikingly lowered the plasma concentration of ALDO, without significantly affecting those of ACTH and B. Ether and cold stresses notably raised the blood levels of ACTH, ALDO and B, and these rises lasted unchanged until 4 h. VIP-A did not affect the response of HPA axis to ether stress, but provoked a marked depression of that to cold stress. In light of these findings the following conclusions can be drawn: (i) endogenous VIP does not regulate HPA-axis function under basal conditions, but it plays a pivotal role in the mechanisms involved in the activation of HPA axis induced by cold exposure; and (ii) endogenous VIP exerts a tonic stimulatory action on ALDO secretion, probably by acting directly on the adrenal zona glomerulosa
EFFECTS OF NEUROMEDIN-U (NMU)-8 ON THE RAT HYPOTHALAMO-PITUITARY-ADRENAL AXIS - EVIDENCE OF A DIRECT EFFECT OF NMU-8 ON THE ADRENAL-GLAND
No full textA 6-day subcutaneous (s.c.) treatment of adult rats with NMU-8 (1.5 or 6 micrograms/100 g/day) increased the average volume of zona fasciculata cells and decreased the number of zona reticularis cells in the adrenal cortex. The lower dose of NMU-8 did not change blood ACTH concentration and adrenal weight, but it notably enhanced serum corticosterone level and basal corticosterone output by adrenal slices. ACTH blood level increased after ether stress in both control and NMU-8-treated rats, but stress-evoked rise in serum corticosterone was observed only in control rats. The higher dose of NMU-8 increased the level of circulating ACTH; however, it decreased adrenal weight and had no effect on serum corticosterone concentration and basal corticosterone output by adrenal slices. NMU-8 (10(-10)/10(-6) M) did not affect basal and ACTH-stimulated corticosterone yield by isolated adrenocortical cells, nor did it change their cytosolic Ca2+ concentration. NMU-8 (10(-8) M) markedly raised basal corticosterone secretion by adrenal slices (including cortex and medulla); higher concentrations of NMU-8 (10(-7)/10(-6) M) were ineffective on basal corticosterone secretion, but strongly inhibited the response to ACTH stimulation. On the ground of these findings it seems reasonable to suggest that NMU-8 exerts a biphasic effect on the function of the peripheral branch of the hypothalamo-pituitary-adrenal axis in rats: NMU-8 at low doses directly stimulates the function and growth of the adrenal cortex, while at high doses exerts a direct inhibitory action
Role of adrenal renin-angiotensin system in the control of aldosterone secretion in sodium-restricted rats
No full textThis study examined the effect of the pharmacological manipulation of adrenal renin-angiotensin system (RAS) on aldosterone secretion from in situ perfused adrenals of rats kept on a normal diet and sodium restricted for 14 days. Neither the angiotensin-converting enzyme inhibitor captopril nor the nonselective angiotensin II receptor antagonist saralasin and the AT(1) receptor-selective antagonist losartan affected basal aldosterone output in normally fed rats. In contrast, they concentration dependently decreased aldosterone secretion in sodium-restricted animals, with maximal effective concentration ranging from 10(-7) to 10(-6) M. Captopril (10(-6) M), saralasin (10(-6) M), and losartan (10(-7) M) counteracted aldosterone response to 10 mM K(+) in sodium-restricted rats but not in normally fed animals. Collectively, these findings provide evidence that adrenal RAS plays a role in the regulation of aldosterone secretion, but only under conditions of prolonged stimulation of zona glomerulosa probably leading to overexpression of adrenal RAS
Cerebellin stimulates the secretory activity of the rat adrenal gland: in vitro and in vivo studies
No full textCerebellin is a 16-aminoacid peptide widely distributed in the central nervous system, where it exerts
neuromodulatory functions. Cerebellin is contained in human adrenal medulla, and it has been recently demonstrated
that cerebellin elicits catecholamine release by human adrenal in vitro. Aim of the present study was to ascertain
whether cerebellin affects adrenal function in the rat. Cerebellin concentration-dependently (from 10–9 to 10–7 M)
increased norepinephrine (but not epinephrine) and cyclic-AMP production by adrenomedullary tissue in vitro. The
norepinephrine response to 10–7 M cerebellin was blocked by the protein kinase (PK) A inhibitor H-89, but not by the
phospholipase C inhibitor U-73122 or the PKC inhibitor calphostin-C. Cerebellin did not affect aldosterone and
corticosterone secretion of dispersed zona glomerulosa and zona fasciculata-reticularis adrenocortical cells. Cerebellin
concentration-dependently (from 10–8 to 10–7 M) enhanced norepinephrine release by in situ perfused rat adrenals.
Cerebellin (10–7 M) also elicited a significant rise in aldosterone and corticosterone output, and this effect was annulled
by either the b1-adrenoceptor antagonist l-alprenolol or H-89. Collectively, the present findings allow us to conclude
that cerebellin 1) directly stimulates norepinephrine release via the adenylate cyclase/PKA-dependent signaling
pathway; and 2) indirectly enhances adrenocortical secretion in vivo, through a paracrine mechanism involving
medullary catecholamine release
Effect of Ce3+ concentration on persistent luminescence of YAGG:Ce3+,Cr3+,Nd3+ nanophosphors obtained by the co-precipitation method
No full textSynthesis of Y3Al2Ga3O12 garnet (YAGG) nanophosphors co-doped with Ce3+, Cr3+, and Nd3+ ions by co-precipitation is reported. The effect of Ce3+ concentration on the structure of garnet and on optical properties including persistent luminescence was investigated. The X-ray diffraction measurements showed that single garnet phase was obtained. The contraction of the crystallites size was observed with increasing the cerium concentration. The combined emission of three used co-dopants together allows to extend persistent luminescence spectral range. The photoluminescence, excitation and persistent luminescence spectra were collected and the optimal Ce3+ concentration for the highest efficiency conversion of UV and blue light into the red and the near infrared emission was determined. Based on thermoluminescence data, the effect of Ce3+ concentration on the traps redistribution was also investigated
Between the theory and praxis of intercultural contact
No full textThe text draws attention to the theory and practice of intercultural contact, constituting the basis of the communal functioning of communities, groups and individuals. By referring to interactionist concepts and praxis, we attempt to present the realities of conducting intercultural (Polish-Israeli) youth meetings. The meetings allow to increase the chance of achieving positive results in the area of reducing mutual stereotypes and prejudice. The text attempts to indicate the possibilities of applying the theory of intercultural contact in praxis related to international Polish-Israeli projects which conform to the framework of intercultural education.Urszula Markowska-Manista: [email protected] Zakrzewska-Olędzka: [email protected] Markowska-Manista - Katedra UNESCO im. Janusza Korczaka, Interdyscyplinarnych Studiów nad Rozwojem i Dobrostanem Dziecka, Wydział Stosowanych Nauk Społecznych, Akademia Pedagogiki Specjalnej w WarszawieDominika Zakrzewska-Olędzka - Katedra UNESCO im. Janusza Korczaka, Interdyscyplinarnych Studiów nad Rozwojem i Dobrostanem Dziecka, Wydział Stosowanych Nauk Społecznych, Akademia Pedagogiki Specjalnej w WarszawieAllport G., (1954). The Nature of Prejudice, Addison-Wesley Publishing Company Massachusetts, California, London, Amsterdam, Ontario, SydneyAronson E., Wilson T. D., Akert R. M. (1997). Uprzedzenia. Przyczyny i środki zaradcze, (w:) Psychologia Społeczna. Serce i umysł, PoznańBem M., (2013), Modele kompetencji międzykulturowych, (w:) J. Muszyńska, W. Danielewicz, T. Bajkowski (red.), Kompetencje międzykulturowe jako kapitał społeczności wielokulturowych, WarszawaBilewicz M., (2006), Kiedy kontakt osłabia uprzedzenia? Kategoryzacje społeczne i temporalne jako warunki skuteczności kontaktu międzygrupowego, „Psychologia Społeczna”, t. 1(02)Błeszyńska K., (2013), Komunikacja międzykulturowa jako negocjowanie znaczeń, „Pogranicze. Studia Społeczne”, t. XXIDąbrowa E., Markowska-Manista U., (2014), Contact theory in multicultural school praxis, (w:) I. Nowosad (red.), International Forum for Education, nr 1(7) School Quality and Culture, ToruńFatyga B., (2004), Słownik antropologii i socjologii kultury, WarszawaKuleta-Hulboj M., (2008), Spotkanie z Innym. Czy polsko-izraelska wymiana młodzieży sprzyja nawiązaniu relacji dialogicznej? „Pedagogika Społeczna”, t. 4Nikitorowicz J., (2013), Kompetencje do komunikacji międzykulturowej w aspekcie tradycyjnej wielokulturowości regionu aspekcie procesów migracyjnych, (w:) J. Nikitorowicz, A. Sadowski, M. Sobecki (red.), „Pogranicze. Studia Społeczne”, t. XXINelson T. D., (2013), Przeciwdziałanie uprzedzeniom, (w:) Psychologia uprzedzeń, GdańskNelson T. D., (2013), Wprowadzenie w tematykę stereotypizacji i uprzedzeń. Definicje uprzedzeń, (w:) Psychologia uprzedzeń, GdańskPettigrew T. F., (1998), Intergroup Contact Theory. „Annual Review of Psychology”, t. 49Sherif M., (1958), Superordinate goals in the Reduction of Intergroup Contact. „The American Journal of Sociology”, t. 63, nr 4Sherif M., Harvey O. J., White B. J., Hood W. R., Sherif C. W., Intergroup Conflict and Cooperation: The Robbers Cave Experiment. 1954–1961, Classics in the History of Psychology, An internet resource developed by Christopher D. Green York University, Toronto,
Ontario, http://psychclassics.yorku.ca/Sherif/ [16.07.2016]Szuchta R., (2007), Podróż do przeszłości. Podróże studyjne młodzieży izraelskiej do Polski, „Przegląd Edukacyjny”Winiewski M., Haska A., Bulska D., (2015), Krytyka państwa Izrael a antysemityzm, (w:) A. Stefaniak, M. Bilewicz, M. Winiewski (red.), Uprzedzenia w Polsce, WarszawaZakrzewska D., (2013), Gotowość do agresji i wzajemne uprzedzenia wśród młodzieży polskiej i żydowskiej. Międzynarodowe studia porównawcze polsko-izraelskie. Praca magisterska przygotowana pod kierunkiem prof. dr. hab. A. Frączka, Akademia Pedagogiki Specjalnej, Warszawa (maszynopis)Zakrzewska D., Żochowska A., (2013), Mutual prejudice among Polish and Jewish adolescents. Research announcement, materiał konferencyjny, IV Tajfel Seminar. History, reconcilliation and intergroup relations, Warszawahttp://www.uniaeuropejska.info.pl/polska-w-unii-europejskiej [16.07.2016]http://stat.gov.pl/spisy-powszechne/nsp-2011/ [16.07.2016]http://web.archive.org/web/20130617162348/http://www.stat.gov.pl:80/gus/5840_5620_PLK_HTML.htm [16.07.2016]https://www.salto-youth.net/tools/toolbox/ [16.07.2016]https://d1dmfej9n5lgmh.cloudfront.net/msport/article_attachments/attachments/10735/original/Izrael_program.pdf?1334722066 [16.07.2016]http://embassies.gov.il/warsaw/Relations/ProjectActivities/Documents/HiddenOpportunities.pdf [21.07.2016]113-1293011312
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
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