Search results for "pine"
showing 10 items of 2022 documents
Post-spinel transformations and equation of state inZnGa2O4: Determination at high pressure byin situx-ray diffraction
2009
Room-temperature angle-dispersive x-ray diffraction measurements on spinel ZnGa{sub 2}O{sub 4} up to 56 GPa show evidence of two structural phase transformations. At 31.2 GPa, ZnGa{sub 2}O{sub 4} undergoes a transition from the cubic spinel structure to a tetragonal spinel structure similar to that of ZnMn{sub 2}O{sub 4}. At 55 GPa, a second transition to the orthorhombic marokite structure (CaMn{sub 2}O{sub 4}-type) takes place. The equation of state of cubic spinel ZnGa{sub 2}O{sub 4} is determined: V{sub 0} = 580.1(9) {angstrom}{sup 3}, B{sub 0} = 233(8) GPa, B'{sub 0} = 8.3(4), and B''{sub 0} = -0.1145 GPa{sup -1} (implied value); showing that ZnGa{sub 2}O{sub 4} is one of the less comp…
Apparent magic numbers in embedded Ti-O clusters
2003
Stable clusters constituted of four ${\mathrm{TiO}}_{2}$ entities have been evidenced in nanometer-sized spinel oxides by a combination of diffraction and x-ray-absorption experiments. Contrary to free clusters, the size of the embedded clusters is strongly determined by the constraints imposed by the surrounding matrix so that the magic number of four is in fact specific to the matrix and only then apparent.
Structural and vibrational properties of CdAl2S4 under high pressure: Experimental and theoretical approach
2014
The behavior of defect chalcopyrite CdAl2S4 at high pressures and ambient temperature has been investigated in a joint experimental and theoretical study. High-pressure X-ray diffraction and Raman scattering measurements were complemented with theoretical ab initio calculations. The equation of state and pressure dependences of the structural parameters of CdAl2S4 were determined and compared to those of other AB(2)X(4) ordered-vacancy compounds. The pressure dependence of the Raman-active mode frequencies is reported, as well as the theoretical phonon dispersion curves and phonon density of states at 1 atm. Our measurements suggest that defect chalcopyrite CdAl2S4 undergoes a phase transit…
AB$$_{2}$$O$$_{4}$$ Compounds at High Pressures
2014
In this chapter, we present an overview of the effects of pressure on the crystalline structure and physical properties of oxygen-based spinels and other related oxides. Recent X-ray diffraction and Raman spectroscopy studies are summarized. A brief description of pressure-driven transitions and post-spinel structures is also provided. We also compare the response to high-pressure of several spinel oxides. We conclude with an examination of elastic and magnetic properties.
Effects of Nifedipine on Blood Pressure, Arterial Compliance and Left Ventricular Mass in Elderly Patients with Isolated Systolic Hypertension
1989
The aim of this study was to evaluate the effects of acute and chronic administration of slow-release nifedipine (SRN) on blood pressure (BP), aortic index (AI), average wall stress (AWS), left ventricular mass (LVM), and other hemodynamic parameters in elderly patients with isolated systolic hypertension (ISH) (systolic blood pressure [SBP] > 175 mmHg). We studied 10 patients (mean age 73.7 ± 5.6 years) in which after a washout period, in basal conditions, 3 h after the administration of SRN (20 mg), and 180 days after chronic therapy (40 mg daily), we evaluated the changes of BP, HR, AI, AWS, LVM, and other parameters obtained by means of echocardiography. After SRN we observed a signific…
Copia de vna carta, escrita al Padre Fray Alonso Sandin, de la Orden de Predicadores, Difinidor, y Procurador General de la Prouincia del Santo Rosar…
Inclou : Pvntos que hemos sabido se escriuen al Consejo contra nosotros este año, y respuesta à ellos... / del mismo Autor de la Carta, h. 8-14 Sign.: A-G2
Epidemiology, monitoring, and treatment strategy in cardiogenic shock. A multinational cross-sectional survey of ESC-acute cardiovascular care associ…
2022
Abstract Aims Cardiogenic shock (CS) is a life-threatening condition burdened by mortality in up to 50% of cases. Few recommendations exist with intermediate–low level of evidence on CS management and no data on adherence across centres exist. We performed a survey to frame CS management at multinational level. Methods and results An international cross-sectional survey was created and approved by European Society of Cardiology-Acute Cardiovascular Care Association board. A total of 337 responses from 60 countries were obtained. Data were assessed by the hospital level of care of the participants. The most common cause of CS was AMI (AMI-CS—79.9%) with significant difference according to ho…
Articaine versus lidocaine inferior alveolar nerve block in posterior mandible implant surgeries: a randomized controlled trial
2023
Background: The aim of this study is to compare the effects of %4 articaine and %2 lidocaine on inferior alveolar nerve block (IANB) for implant surgery in the posterior mandible.Material and Methods: The patients who have inserted implants in the posterior mandible were divided into 2 groups for IANB: lidocaine and articaine. VAS = visual analog scale, pain during surgery and injection, lip numb-ness time, mandibular canal-implant apex distance, age, gender, bone density, implant number, release incision, adjacent teeth, and duration of surgery were analyzed using t-test, Mann-Whitney U test, Spearman's coefficient, and, Pearson's chi-squared test. This trial followed the recommendations o…
Chemical composition and antimicrobial activity of the essential oils of some species of Anthemis sect. Anthemis (Asteraceae) from Sicily
2017
The chemical composition of the essential oils isolated from the aerial parts of Anthemis arvensis L. subsp. arvensis, Anthemis cretica subsp. messanensis (Brullo) Giardina & Raimondo and from flowers and leaves of Anthemis cretica subsp. columnae (Ten.) Frezén were determinated by GC–FID and GC–MS analyses. Torreyol (85.4%) was recognised as the main constituent of the Anthemis arvensis subsp. arvensis essential oil, while in the essential oils of Anthemis cretica subsp. messanensis, collected on the rock and cultivated in Hortus Botanicus Panormitanus, (E)-chrysanthenyl acetate (28.8 and 24.2% resp.), 14-hydroxy-α-humulene (8.1 and 5.3% resp.), santolina triene (8 and 5.8% resp.) and …
Oxcarbazepine does not affect the anticoagulant activity of warfarin.
1992
The possible interaction of the antiepileptic drug oxcarbazepine (OCBZ) on the anticoagulant effect of warfarin was investigated in 10 healthy male volunteers. After reaching steady-state conditions by repeated administration of warfarin, the prothrombin time (Quick value) was assessed before and after single (600 mg) and multiple dosing (450 mg twice daily in 1 week) of OCBZ. In 7 of the 10 volunteers with evaluable data, the prothrombin time was not significantly different (paired t test) from baseline either after single (p = 0.299) or repeated dosing (p = 0.333), indicating that OCBZ does not interact to any relevant extent with the hypothrombinemic effect of warfarin.