Acadia University

About: Acadia University is a education organization based out in Wolfville, Nova Scotia, Canada. It is known for research contribution in the topics: Population & Wireless sensor network. The organization has 1903 authors who have published 3881 publications receiving 90517 citations. The organization is also known as: Queen's College.

Frequency and nature of falls among older women in India.

Abstract: The purpose of this study was to examine the frequency and nature of falls and fall-related injuries among older women in the state of Kerala, India. The study involved 82 community living and 63 institutionalized women aged 60 years or older in Trivandrum, Kerala, India. Demographic data and falls profile were collected through the use of a field survey. A significantly lower percentage (45%) of community dwelling participants suffered a fall in the previous year, compared to 64% of those in the Long Term Care (LTC) settings (p Language: en

Acid-base relationships in the blood of the toad, Bufo marinus. II. The effects of dehydration.

Abstract: Cutaneous CO 2 excretion is reduced as the skin dries during dehydration but an increase in breath frequency acts to regulate the arterial blood P co co2 and thus pHα. Moreover, the toad does not urinate and water is reabsorbed from the bladder to replace that lost by evaporation at the skin and lung surfaces. The animal does, however, produce a very acid bladder urine to conserve circulating levels of plasma [HCO 3 -] and this together with an increased ventilation effectively maintains the blood acid-base status for up to 48 h of dehydration in air. Water loss and acid production are presumably also reduced by the animal9s behaviour; animals remain still, in a crouched position or in a pile if left in groups. Dehydrated toads are less able than hydrated toads to regulate blood pH during hypercapnia: they hyperventilate and mobilize body bicarbonate stores in much the same fashion as hydrated animals but due to the restrictions on cutaneous CO 2 excretion and renal output, there is comparatively little reduction in the P CO CO2 difference between arterial blood and inspired gas thereby resulting in a more severe respiratory acidosis. These factors further contribute to the persistent acidosis which continues even when the animals are returned to air.

Provenance variations in northern Appalachian Avalonia based on Detrital zircon age patterns in Ediacaran and Cambrian sedimentary rocks, New Brunswick and Nova Scotia, Canada

Abstract: Avalonia in the northern Appalachian orogen is generally assumed to have originated near the margin of Gond- wana, although its position along that extensive margin and the timing of its separation remain disputed. U-Pb ages deter- mined by laser ablation - inductively coupled plasma - mass spectrometry are reported here for detrital zircon from Avalonian clastic sedimentary units, three in southern New Brunswick, and one in southeastern Cape Breton Island, with depositional ages ranging from ca. 630 to ca. 505 Ma. Considered in combination with previously published detrital data sets from two other samples from southern New Brunswick deposited in a similar age range, the samples show a wide spec- trum of ages from Ediacaran to Neoarchean (as old as 3.2 Ga). The dominant zircon populations in all six samples are Edia- caran-Cryogenian with ages between 770 and 540 Ma and can be matched with known magmatic events in Avalonia. Pre- Avalonian cycle detrital zircon dates in the samples are relatively sparse and do not reveal a consistent signature that might be used to place Avalonia in a unique paleogeographic position, although they are compatible with Amazonian provenance. An increase in ca. 2.2-1.9 Ga zircon dates in Early Cambrian through Early Ordovician samples suggests that sources for zircon of those ages became available in Avalonia by the end of the Ediacaran, possibly by motion of Avalonia to a different part of the Amazonian margin or to the West African craton. Resume : Il est presume que l'origine d'Avalonie dans l'orogene du nord des Appalaches se situait a proximite de la bor- dure de Gondwana, bien que sa position le long de cette longue bordure et le moment de sa separation demeurent des points de controverse. Des âges U-Pb obtenus par ablation laser - spectrometrie de masse a plasma inductif (LA-ICP-MS) sont donnes dans cet article pour des zircons detritiques provenant d'unites sedimentaires clastiques d'Avalonie, soit trois unites du sud du Nouveau-Brunswick et une du sud-est de l'ile du Cap-Breton; les âges des depositions varient entre ∼630 Ma a ∼505 Ma. Lorsque ces echantillons sont etudies a la lumiere d'ensembles de donnees publies anterieurement provenant de deux autres echantillons du sud du Nouveau-Brunswick, deposes dans une plage de temps similaire, ils montrent une vaste plage d'âge, de l'Ediacarien au Neoarcheen (atteignant 3,2 Ga). Les populations dominantes de zircons dans tous les six echantillons datent de l'Ediacarien-Cryogenien avec des âges entre 770 et 540 Ma; elles peuvent etre reliees a des evene- ments magmatiques connus en Avalonie. Dans les echantillons, les dates pour le zircon detritique d'avant l'Avalonie sont peu nombreuses et ne revelent pas une signature constante qui pourrait servir a placer l'Avalonie dans une position paleo- geographique unique, bien qu'elles soient compatibles avec une provenance amazonienne. Une augmentation, ∼2,2 a 1,9 Ga, des dates du zircon dans les echantillons du Cambrien precoce a l'Ordovicien precoce suggere que les sources pour les zircons de ces âges soient devenues disponibles en Avalonie a la fin de l'Ediacarien, possiblement par le deplacement d'A- valonie a une autre partie de la bordure d'Amazonie ou vers le craton ouest-africain. (Traduit par la Redaction)