94 research outputs found
Bijdrage tot de kennis der weersgesteldheid ter kuste van Atjeh
No full textdoor P.A. Bergsma en L. Backer Overbee
Alternanthera paronychioides St Hil. (Amaranthaceae) in Indo-Malesia
No full textDuring a study of species of Alternanthera Forsk. introduced in the Netherlands it was necessary to compare the Malesian representatives of A. ficoidea (L.) R. Br. ex Griseb. ssp. bettzickiana (Regel) Backer (Fl. Mal. I, 4, 1949, 91). The material under this name present in the Rijksherbarium, Leiden, proved to be heterogeneous, part of it belonging to another species.
Dr. Van Steenis pointed out to me an article by Pedersen (Kurtziana 14, 1967, 437), where A. paronychioides St. Hil. was mentioned for Malesia, and showed me his correspondence with the author, where further details concerning this species were given. A closer study showed the unidentified specimens to belong to that species
HIGH RESOLUTION INFRARED SPECTRA OF THE ) OZONE MOLECULE (1200 TO . LINE POSITIONS
No full textAuthor Institution: Groupe de Spectrom\'etrie Mol\'eculaire et Atmosph\'erique, UMR CNRS 6089 Universit\'e de Reims - Moulin de la Housse - BP 1039After the previous systematic analysis of in medium infrared, we present here the results of the analysis of new observed bands. The spectra have been recorded with the FTS of , with a resolution of , and products pathlength pressure up to Torr. The data reduction to derive line positions uses a new multifit . The analysis of spectra is performed using the same formalism as in references [1-4], using standard Watson's Hamiltonian for diagonal blocks and Coriolis and Fermi resonances for off diagonal blocks. 8 polyads have been analysed, among them 7 being analysed for the first time. They correspond to 10 observed bands (underlined) in interaction with ``dark'' bands. We give here the range of J and for observed transitions, statistics for energy levels, spectroscopic parameters and resonance coupling parameters. Acknowledgments: Authors thank S.A Tashkun for use of GIP programs, X. Thomas and P. Von der Heyden for recording spectra, L. R\'{e}galia and J. J. Plateaux for the use of multifit program. 1. S. M. Mikhailenko, A. Barbe, VI. G. Tyuterev and A. Chichery, Atmos. Oceanic Opt., 12, 9 (1999) 2. A. Chichery, A. Barbe, VI. G. Tyuterev, J. Molecular Spectrosc., 206, 1 - 26 (2001) 3. A. Chichery, A. Brabe, VI. G. Tyuterev, S.A. Tashkun, J. Molecular Spectrosc., 205, 347-349 (2001) 4. M. R. De Backer Barilly, A. Barbe, VI. G. Tyuterev, A. Chichery, Mol. Phys., accepted (2002). 5. J.J. Plateaux, A. Barbe, and A. Delahaigue, Spectrochim. Acta, A 51, 1153-1196 (1995). 6. L. R\'{e}galia, Thesis Universit\'{e} de Reims, (France) (1996). 7. J.J. Plateaux, L. R\'{e}galia, C. Boussin and A. Barbe, J.Q.S.R.T., 68, 507-520 (2001)
Environmental toxicity, redox signaling and lung inflammation:the role of glutathione
No full textGlutathione (gamma-glutamyl-cysteinyl-glycine, GSH) is the most abundant intracellular antioxidant thiol and is central to redox defense during oxidative stress. GSH metabolism is tightly regulated and has been implicated in redox signaling and also in protection against environmental oxidant-mediated injury. Changes in the ratio of the reduced and disulfide form (GSH/GSSG) can affect signaling pathways that participate in a broad array of physiological responses from cell proliferation, autophagy and apoptosis to gene expression that involve H(2)O(2) as a second messenger. Oxidative stress due to oxidant/antioxidant imbalance and also due to environmental oxidants is an important component during inflammation and respiratory diseases such as chronic obstructive pulmonary disease, idiopathic pulmonary fibrosis, acute respiratory distress syndrome, and asthma. It is known to activate multiple stress kinase pathways and redox-sensitive transcription factors such as Nrf2, NF-kappaB and AP-1, which differentially regulate the genes for pro-inflammatory cytokines as well as the protective antioxidant genes. Understanding the regulatory mechanisms for the induction of antioxidants, such as GSH, versus pro-inflammatory mediators at sites of oxidant-directed injuries may allow for the development of novel therapies which will allow pharmacological manipulation of GSH synthesis during inflammation and oxidative injury. This article features the current knowledge about the role of GSH in redox signaling, GSH biosynthesis and particularly the regulation of transcription factor Nrf2 by GSH and downstream signaling during oxidative stress and inflammation in various pulmonary diseases. We also discussed the current therapeutic clinical trials using GSH and other thiol compounds, such as N-acetyl-l-cysteine, fudosteine, carbocysteine, erdosteine in environment-induced airways disease
Author Correction: Metaverse in surgery — origins and future potential (Nature Reviews Urology, (2024), 10.1038/s41585-024-00941-4)
No full textCorrection to: Nature Reviews Urologyhttps://doi.org/10.1038/s41585-024-00941-4, published online 30 September 2024. In the version of the article initially published, Enrico Checcucci was wrongly stated to be affiliated with the University of Verona. This has now been amended in the HTML and PDF versions of the article so that Enrico Checcucci’s only affiliation is Department of Surgery, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Turin, Italy
Exercises in anatomy: tetralogy of Fallot
No full text\ua9 The Author 2014. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved. It is axiomatic that those performing surgery on the congenitally malformed heart require a thorough knowledge of the lesions they will be called upon to correct. The necessary anatomical knowledge is becoming increasingly difficult to obtain at first hand, since relatively few centres now hold archives of specimens obtained in an appropriately legal fashion from the patients unfortunately dying in previous years. One centre with such an archive is Ann and Robert H. Lurie Children\u27s Hospital in Chicago, known previously as Chicago Memorial Children\u27s Hospital. The archive was established by Farouk S. Idriss, and was subsequently enhanced and consolidated by his son, Rachid. It is now under the care of Carl L. Backer, the current chief of paediatric cardiothoracic surgery at Lurie Children\u27s. With the support of Carl, the archive has been triaged and catalogued by Diane E. Spicer and Robert H. Anderson. It has now been used to create a series of video presentations, illustrating the salient features of surgical anatomy of selected entities, with the videoclips being edited and prepared for publication by Anne Sarwark. This video contains the fruits of the first of these exercises in anatomy, and is devoted to tetralogy of Fallot.We begin the exercise by making comparisons between the normal heart and the arrangement seen in typical tetralogy. We emphasize the need to recognize the \u27building blocks\u27 of the normal outflow tracts, and show how they come apart in tetralogy. We then show the variations to be found in the specific morphology of the borders of the hole between the ventricles, with the crest of the apical ventricular septum being overridden by the orifice of the aortic valve such that the latter structure has a biventricular connection. We emphasize that it is the squeeze between the deviated muscular outlet septum and septoparietal trabeculations that is the essential phenotypic feature of the lesion. We then proceed to demonstrate the further variation to be found in the length of the outlet septum, which in extreme cases can be fibrous and hypoplastic rather than muscular. We also show how the ventriculo-arterial connection can vary from being concordant to becoming double outlet from the right ventricle. We conclude by emphasizing that the anatomy of tetralogy can also be recognized when the subpulmonary outflow tract is atretic rather than stenotic
Estimation of central arterial pressure from the radial artery in patients undergoing invasive neuroradiological procedures
No full textBackgrounds: Central arterial pressure can be derived from analysis of the peripheral artery waveform. The aim of this study was to compare central arterial pressures measured from an intra-aortic catheter with peripheral radial arterial pressures and with central arterial pressures estimated from the peripheral pressure wave using a pressure recording analytical method (PRAM). Methods: We studied 21 patients undergoing digital subtraction cerebral angiography under local or general anesthesia and equipped with a radial arterial catheter. A second catheter was placed in the ascending aorta for central pressure wave acquisition. Central (AO) and peripheral (RA) arterial waveforms were recorded simultaneously by PRAM for 90-180 s. During an off-line analysis, AO pressures were reconstructed (AOrec) from the RA trace using a mathematical model obtained by multi-linear regression analysis. The AOrec values obtained by PRAM were compared with the true central pressure value obtained from the catheter placed in the ascending aorta. Results: Systolic, diastolic and mean pressures ranged from 79 to 180 mmHg, 47 to 102 mmHg, and 58 to 128 mmHg, respectively, for AO, and 83 to 174 mmHg, 47 to 107 mmHg, and 60 to 129 mmHg, respectively, for RA. The correlation coefficients between AO and RA were 0.86 (p < 0.01), 0.83 (p < 0.01) and 0.86 (p < 0.01) for systolic, diastolic and mean pressures, respectively, and the mean differences-0.3 mmHg, 2.4 mmHg and 1.5 mmHg. The correlation coefficients between AO and AOrec were 0.92 (p < 0.001), 0.87 (p < 0.001) and 0.92 (p < 0.001), for systolic, diastolic and mean pressures, respectively, and the mean differences 0.01 mmHg, 1.8 mmHg and 1.2 mmHg. Conclusions: PRAM can provide reliable estimates of central arterial pressure. © 2019 The Author(s)
Protocol for the United Kingdom Rotator Cuff Study (UKUFF) : a randomised controlled trial of open and arthroscopic rotator cuff repair
No full textThis project was funded by the NIHR Health Technology Assessment programme (project number 05/47/02). J. L. Rees has received a grant from Oxford University which is related to this paper. J. Dawson reports that Oxford University has received a grant from HTA which is related to this paper, as well as a study grant.Peer reviewe
PAST AND PRESENT LAND TENURE SYSTEMS IN ALBANIA: PATRILINEAL, PATRIARCHAL, FAMILY-CENTERED
No full textThis paper attempts to evaluate whether Albanian rural social structure has changed to the extent that individual rights and protection of those rights have become important policy questions. If the evaluation suggests that rural Albanians retain the set of family-oriented norms and beliefs that are based primarily on patriarchalism and patrilineal inheritance, we must address the following questions: How appropriate is the mixture of western law that emulates individualistic notions of property rights with the customary family-tenure system of rural Albania? What are the likely problems that could emerge during the transition given a potential conflict between family notions of ownership and individual notions of ownership? This paper discusses five broad issues: the contemporary importance of family ownership, the role of the patriarch, the contemporary inheritance procedures, the vulnerability of specific groups of women, and the structure of the Albanian family. Keywords: Land tenure -- Albania Right of property -- Albania Inheritance and succession -- Albania Albania -- Social conditionsLand tenure -- Albania, Right of property -- Albania, Inheritance and succession -- Albania, Albania -- Social conditions, Land Economics/Use,
The impact of vascular calcification on ambulatory and central aortic blood pressure in a South African dwelling dialysis population : a clinical, radiological and pathophysiological study of vascular health in a young prevalent dialysis population in a developing country
No full textIncludes abstract.Includes bibliographical references.In Sub-Saharan Africa, the prevalence of vascular calcification (VC) in CKD-5D is unknown. We undertook to determine the effect of ethnicity on VC, the risk factors for VC, the utility of abdominal X-ray (AXR) in predicting coronary calcium score (CCS) and the effect of VC on central aortic systolic pressure (CASP) and left ventricular mass index (LVMI) in South African dialysis patients. ... Black race significantly protects from VC in South African CKD-5D patients and warrants further study. The AXR is a useful screening tool for CCS in our population. VC does not appear to influence CASP in our population
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