Results 21 to 30 of about 595,547 (165)

Development of novel diatom metrics to assess ecological status of phytobenthos in Greek lakes

open access: yesEcological Indicators, 2023
Mediterranean lakes present particular challenges when developing ecological assessment techniques, due partly to long histories of human activity in their catchments but also to strong interactions with climate, intensifying in recent decades due to ...
Martyn Kelly   +4 more
doaj   +1 more source

Natural history of gastro‐oesophageal reflux disease diagnosed in general practice [PDF]

open access: yesAlimentary Pharmacology & Therapeutics, 2004
SummaryBackground : Cross‐sectional studies indicate that gastro‐oesophageal reflux disease symptoms have a prevalence of 10–20% in Western countries and are associated with obesity, smoking, oesophagitis, chest pain and respiratory disease.Aim : To determine the natural history of gastro‐oesophageal reflux disease presenting in primary care in the UK ...
Ruigomez, A.   +5 more
openaire   +3 more sources

British Museum (Natural History): General and Departmental Libraries [PDF]

open access: yesNature, 1930
WITH reference to a review, appearing in the Supplement to NATURE for Oct. 4, of the list of place-numbers of societies issuing serial publications contained in the General Library of the British Museum (Natural History), I have been desired to point out that this List, being a General Library List, does not include the more special serials housed in ...
openaire   +2 more sources

Natural History of Patients with X-ray-negative Dyspepsia in General Practice [PDF]

open access: yesBMJ, 1972
When 102 patients with dyspepsia who had normal findings on barium-meal examination in 1964 were interviewed in 1970, 85 of them (76%) were symptomatically improved, and only three were later shown to have a peptic ulcer. This suggests that "x-ray-negative dyspepsia" has a good prognosis in a general practice setting.
D W, Gregory   +3 more
openaire   +4 more sources

Classical Nature: Natural History, Classical Humanism, and the Value of Knowledge in Sweden, 1800–1850

open access: yesJournal for the History of Knowledge, 2021
This article investigates a series of attempts to imbue natural history with humanistic values and align its epistemological goals with those of classical studies in Sweden during the first half of the nineteenth century. By tracing the claims made by a
Isak Hammar
doaj   +1 more source

Natural history and general management of unruptured intracranial aneurysms

open access: yesNeurosurgical Focus, 2004
After an aneurysmal subarachnoid hemorrhage, nearly half of the patients die and the half who survive suffer from irreversible cerebral damage. With increasing use of noninvasive neuroimaging techniques (for example, magnetic resonance and computerized tomography angiography), more unruptured cerebral aneurysms are found.
Peng Roc, Chen   +2 more
openaire   +2 more sources

Postcranial skeletal anatomy of the holotype and referred specimens of Buitreraptor gonzalezorum Makovicky, Apesteguía and Agnolín 2005 (Theropoda, Dromaeosauridae), from the Late Cretaceous of Patagonia [PDF]

open access: yesPeerJ, 2018
Here we provide a detailed description of the postcranial skeleton of the holotype and referred specimens of Buitreraptor gonzalezorum. This taxon was recovered as an unenlagiine dromaeosaurid in several recent phylogenetic studies and is the best ...
Federico A. Gianechini   +3 more
doaj   +2 more sources

Elemental and isotopic analysis of leaves predicts nitrogen-fixing phenotypes

open access: yesScientific Reports
Nitrogen (N)-fixing symbiosis is critical to terrestrial ecosystems, yet possession of this trait is known for few plant species. Broader presence of the symbiosis is often indirectly determined by phylogenetic relatedness to taxa investigated via ...
Joshua R. Doby   +6 more
doaj   +1 more source

Bivalvia biostratigraphy of Aksütlü region (Hekimhan, NW Malatya, Türkiye) and paleoclimatological interpretations

open access: yesBulletin of the Mineral Research and Exploration
In this study, Early Miocene bivalve fauna obtained from Hekimhan Aksütlü locality is presented. Abundant and well-preserved ostreid samples are interesting in the area where molluscs have notbeen studied before.
Müjde Gürsoy
doaj   +1 more source

Natural History: the sense of wonder, creativity and progress in ecology

open access: yesScientia Marina, 2001
This essay addresses the question of blending natural history and ecological wisdom into the genuine creativity exemplified by Prof. Ramon Margalef. Many have observed that modern biology is a triumph of precision over accuracy, and that ecology has ...
Paul K. Dayton, Enric Sala
doaj   +1 more source

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