Search Results - (Author, Cooperation:S. Mathews)

2013-06-08

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

2013-04-13

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Animals ; Arm Bones/anatomy & histology ; Biological Evolution ; Biomechanical Phenomena ; Bones of Upper Extremity/*anatomy & histology/physiology ; Clavicle/anatomy & histology ; Female ; *Fossils ; Hominidae/*anatomy & histology/*physiology ; Humans ; Locomotion ; Male ; Principal Component Analysis ; Scapula/anatomy & histology ; South Africa ; Upper Extremity/*anatomy & histology/*physiology

2011-10-25

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Bayes Theorem ; *Biological Evolution ; Climate Change ; *Cycadophyta/anatomy & histology/classification/genetics ; Extinction, Biological ; *Fossils ; Genes, Plant ; *Genetic Speciation ; Molecular Sequence Data ; Phylogeny

2018-02-10

Royal Society

2054-5703

Natural Sciences in General

evolution, health and disease and epidemiology

1089-7690

AIP Digital Archive

Physics

Chemistry and Pharmacology

The infrared spectrum of gaseous CH3I has been investigated in the range 500–16 500 cm−1, up to six quanta of excitation in CH stretching. A total of 16 perpendicular bands lying above 3700 cm−1 have been analyzed, some as Fermi resonance diads, in order to determine accurate vibrational wave numbers for the constituent levels. The local mode model has been applied to the CH stretching manifold to account for anharmonicity and the effects of Darling–Dennison resonances. Vibrations not involving CH stretching have been treated in a normal mode basis. The joint approach, which also takes into account known Fermi resonances, enables a complete set of 27 vibrational anharmonicity parameters to be determined for CH3I which fits 63 observed vibrational levels up to V=6 with a root-mean square (rms) error of 2.75 cm−1.

Electronic Resource

1077-3118

AIP Digital Archive

Physics

High quality epitaxial SrS:Eu,Sm thin films have been deposited on (111) and (001) BaF2, (001) Gd3Ga5O12, and (001) MgO oriented substrates by pulsed laser deposition (PLD) in vacuum and H2S partial pressures. Structural evaluation of the SrS films showed them to be highly oriented along the (001) direction when deposited on (001) BaF2 or (001) MgO substrates, with a rocking angle full width half-maximum (FWHM) of about 0.5° for the SrS (002) peak on both substrates. The φ scans of the (111) SrS peak of these films indicated a high degree of in-plane epitaxy as well, with no signs of high angle grain boundaries. For the films grown on MgO substrates, the infrared stimulated luminescence was measured as a function of deposition temperature and found to depend on the film's degree of crystallinity. These results indicate that PLD is a viable technique for the growth of highly epitaxial photoluminescent SrS:Eu,Sm thin films. © 1996 American Institute of Physics.

Electronic Resource

1365-3040

Blackwell Publishing Journal Backfiles 1879-2005

Biology

The structures and functions of the phytochrome apoprotein genes (the PHY genes), their diversity across the plant kingdom, and their evolution are central concerns in the study of red-light sensing in plants. We summarize here recent advances in two areas relating to these topics: (1) the characteristics of the PHY gene family in Arabidopsis thaliana, the higher plant species for which the most extensive information on these genes is available, and (2) the similarity relationships, phylogeny, and evolutionary implications of PHY gene sequences and partial sequences which have been described from various plants. Together, these two areas of study, one directed at understanding in detail the phytochromes present in a single species and the other directed at a much broader understanding of PHY gene relatedness and distribution, are producing an increasingly clear picture of the diversity and evolution of plant red-light photoreceptors. Moreover, they suggest that the complexity of the phytochrome family has increased as land plants have evolved novel morphologies.

Electronic Resource

1365-2044

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Summary We studied whether tramadol administered at the time of wound closure can prevent 
postanaesthetic shivering. One hundred and fifty patients scheduled for general anaesthesia and surgery were randomly allocated and tramadol was administered intravenously at a dose of 
2 mg.kg−1 in the high-dose group, 1 mg.kg−1 in the low-dose group and 0.9% saline in the control group. In the high-dose group, 2% of patients had postanaesthetic shivering, compared to 4% in the low-dose group and 48% in the control group (p 〈 0.001 vs. tramadol groups). There was no delay in tracheal extubation after reversal of neuromuscular blockade. The incidence of adverse side-effects such as sedation and vomiting did not differ statistically and were clinically not significant. This study strongly supports the use of tramadol at wound closure for prevention of postanaesthetic shivering.

Electronic Resource

0308-8146

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Process Engineering, Biotechnology, Nutrition Technology

Electronic Resource

0361-476X

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Education

Psychology

Electronic Resource

0167-0115

Dog ; Glucagon ; Insulin ; Islet ; Somatostatin

Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Medicine

Electronic Resource

0009-6407

History

Theology and Religious Studies

Books Reviewed

1432-0983

mtDNA of Saccharomyces cerevisiae ; rho−restriction mapping ; Intervening sequence mutations

Springer Online Journal Archives 1860-2000

Biology

Summary A physical map of the COB region in mtDNA of yeast has been established. This region harbours a split gene coding for apocytochrome b. It includes restriction sites of seven endonucleases (EcoRI, HindII, HindIII, HaeIII, HpaII, AluI and BamHI). Various mtDNA sequences of this region, retained in a series of genetically characterized rho− clones have been allocated to this map. The combination of this physical map with a genetic map of the rho− clones revealed that 1) cob− mutational sites spread over 8,400 bp, 2) mutations in sequences coding for apocytochrome b map in five distinct segments which are separated by intervening sequences with minimum lengths from 350 to 1,900 bp.

Electronic Resource

1432-5195

Springer Online Journal Archives 1860-2000

Medicine

Résumé. Nous avons étudié rétrospectivement l’utilisation de l’analgésie contrôlée par le patient (ACP) chez 100 adolescents ayant subi une chirurgie de correction de scoliose idiopathique. Quatre-vingt-quatorze adolescentes et 6 adolescents, de 11 à 19 ans, ont été inclus dans cette étude. La programmation de la pompe d’ACP pour la morphine était la suivante: dose de charge 114.5 μg · kg –1 , bolus de 24.8 μg · kg–1 et intervalle entre deux injections de 9.9 minutes. L’ACP a été utilisée en moyenne pendant 75.8 heures, et le pourcentage de demandes satisfaites était de 52.2. Les besoins en morphine délivrée par l’ACP, ont été très variables, avec une tendance vers des besoins plus importants avec l’âge. Les besoins en morphine n’ont pas été significativement différents durant les trois premiers jours postopératoires, et la consommation moyenne de morphine pendant cette période a été de 52.5 μg · kg–1· h–1. Les nausées et vomissements ont été rapportés chez 45% des adolescents, contre 15% pour le prurit. Nous avons enregistré 7 cas de dépression respiratoire, mais tous les patients ont récupéré rapidement et complètement. L’utilisation de l’ACP chez l’adolescent après chirurgie orthopédique majeure est associée à des besoins importants en morphine, mais reste sécuritaire.

Summary. One hundred adolescents undergoing posterior spinal fusion for scoliosis were reviewed to assess the adequacy of postoperative patient-controlled analgesia. There were 94 females and 6 males. The mean settings for morphine dosage were a loading dose of 114.5 μg · kg –1 , a bolus dose of 24.8 μg · kg–1, and a lockout interval of 9.9 minutes. This was used for an average of 75.8 h, with a 52.2% success rate. Adolescents using patient-controlled analgesia showed a great variability in morphine requirements with greater use as they became older. The requirement was not significantly different on the 1st, 2nd and 3rd postoperative days and the total consumption was 52.2 μg · kg–1· h–1. Nausea and vomiting occurred in 45% and pruritus in 15%. There were 7 cases of respiratory depression who all recovered promptly and completely. This method is associated with high morphine requirements in adolescents, but can be used safely.

Electronic Resource

1573-0743

biodistribution ; SPET ; tetrofosmin

Springer Online Journal Archives 1860-2000

Medicine

Abstract The recommended protocol for Tc99m tetrofosmin myocardial imaging suggests either a one- or two day imaging protocol so that stress and rest studies are sufficiently separated in time to allow optimum myocardium to background uptake ratios to differentiate between myocardial ischaemia and/or infarction. The biokinetic data for tetrofosmin suggest that no significant changes occur in myocardial distribution up to 180 minutes post injection. It is, therefore, necessary for two doses of the radiopharmaceutical and two separate studies to evaluate the myocardial status during stress and rest. This study assessed the differences between the 1 and 4 hour post injection SPET images obtained following peak exercise in 20 consecutively chosen patients. In addition, these images were compared to the rest images obtained on the following day after a second dose of the radiopharmaceutical was administered. In 4 patients, a one and four hour post injection study was also done during the rest phase. The results demonstrate significant changes in Tc-99m tetrofosmin distribution between the one hour and four hour post injection images. These differences are present during the stress as well as rest studies.

Electronic Resource

1572-9605

High-temperature superconductivity ; multiplexer ; narrow-band filter ; circulator ; high-Q spiral resonator

Springer Online Journal Archives 1860-2000

Electrical Engineering, Measurement and Control Technology

Physics

Abstract The application of high-temperature superconducting thin films to microwave systems is expected to lead to major volume and weight savings as well as improved performance. To take full advantage of the properties that the new materials have to offer and justify the additional cooling equipment that accompanies the introduction of superconductivity, many HTS components will have to be integrated. In this paper some of the key microwave circuits that show great promise in this respect, such as multiplexers, circulators, and very narrowband filters, will be discussed and experimental results presented.

Electronic Resource