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  • hypertension  (27)
  • NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
  • Springer  (27)
  • PANGAEA  (3)
  • 1985-1989  (29)
  • 1940-1944
  • 1935-1939  (1)
Collection
Keywords
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  • Springer  (27)
  • PANGAEA  (3)
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    A comparison of felodipine and propranolol as additions to hydrochlorothiazide in the treatment of hypertension (1988)
    Springer
    European journal of clinical pharmacology 34 (1988), S. 115-118 
    Details
    ISSN: 1432-1041
    Keywords: felodipine ; propranolol ; hydrochlorothiazide ; hypertension ; general practice ; blood pressure ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Eighty one patients with uncomplicated hypertension who required additional antihypertensive medication (diastolic Phase V [dBP]≧95 mm Hg) after 4 weeks treatment with hydrochlorothiazide (HCTZ) 25 mg o.m. were randomized to receive felodipine 5 mg b.i.d. (n=40) or propranolol (n=41) 80 mg b.i.d. in addition to HCTZ 25 mg o.m. If the dBP measured about 12 h post-dose was not ≦90 mm Hg after 4 weeks, the dose of felodipine or propranolol was doubled. The double blind trial period was 8 weeks for all patients. Over the 8 week period, felodipine reduced the seated dBP from 100 to 83 mm Hg and propranolol from 101 to 86 mm Hg. The attained seated dBPs were significantly different in the two groups. About one third of patients in each group received the high dose of second-line therapy. After 8 weeks 91% of patients receiving HCTZ+felodipine and 84% receiving HCTZ+propranolol had a dBP ≦ 90 mm Hg. Both regimens were well-tolerated with an equal incidence but different pattern of adverse events (felodipine: flushing, headache and peripheral oedema; propranolol: dyspepsia, fatigue and vasospasm). In this 8-week study, felodipine and propranolol were safe and effective second-line antihypertensive drugs when added to hydrochlorothiazide. At the doses selected, felodipine was at least as effective as propranolol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614545
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  • 2
    Electronic Resource
    Electronic Resource
    A double-blind comparison of felodipine and hydrochlorothiazide added to metoprolol to control hypertension (1988)
    Springer
    European journal of clinical pharmacology 34 (1988), S. 21-24 
    Details
    ISSN: 1432-1041
    Keywords: felodipine ; metoprolol ; hydrochlorothiazide ; hypertension ; blood pressure ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Seventy-six uncomplicated hypertensive patients treated in General Practice, whose seated diastolic blood pressure (Phase V) (dBP) remained ≥95 mmHg after a minimum of 4 weeks treatment with metoprolol 50 mg b.i.d. as antihypertensive monotherapy, were randomized to receive the selective ‘calcium antagonist’ felodipine 5 mg b.i.d. or hydrochlorothiazide 12.5 mg b.i.d. in addition to metroprolol 50 mg b.i.d. The trial duration was 8 weeks, the dose of the felodipine or hydrochlorothiazide being doubled after 4 weeks if ‘control’ of BP (dBP 〈90 mmHg) was not achieved on the initial doses. Over the trial period of 8 weeks, felodipine reduced dBP from 102 to 85 mmHg and hydrochlorothiazide from 101 to 91 mmHg; the dBP reduction in the felodipine group was greater than that in the hydrochlorothiazide group (17 vs 9 mmHg) and the attained dBP lower in the felodipine group. About half of the patients in each group required the higher dose. Both regimes were effective and well tolerated. In the dosages used, felodipine was a slightly more effective antihypertensive drug than hydrochlorothiazide when added to metoprolol. There was no apparent difference in the tolerability of the two regimes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01061411
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  • 3
    Electronic Resource
    Electronic Resource
    The effects of the 5 HT2 antagonist ritanserin on blood pressure and serotonin-induced platelet aggregation in patients with untreated essential hypertension (1988)
    Springer
    European journal of clinical pharmacology 35 (1988), S. 123-129 
    Details
    ISSN: 1432-1041
    Keywords: ritanserin ; hypertension ; serotonin ; (5 HT) ; blood pressure ; platelet aggregation ; QT interval
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary We have given the selective 5 HT2 antagonist ritanserin in a dose of 10 mg twice daily for 4 weeks in a double-blind, randomized, placebocontrolled, parallel group study of 18 patients with untreated essential hypertension. The fall in single platelet count due to 5 HT-induced platelet aggregation was significantly reduced by ritanserin compared with placebo (p〈0.05). There were no significant changes in supine or erect blood pressure or heart rate after ritanserin compared to placebo. Forearm blood flow, measured by mercury-in-strain gauge venous occlusion plethysmography, was not significantly altered by ritanserin. Ritanserin caused prolongation of the QTc interval by 41 (SEM 11) ms (p〈0.05 compared to placebo) but had no detectable effect on QRS duration, features suggestive of Class III antiarrhythmic activity. These findings do not support an independent role of the 5 HT2 receptor in maintaining raised arterial pressure in essential hypertension.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00609240
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  • 4
    Electronic Resource
    Electronic Resource
    The pharmacokinetics and haemodynamics of BTS 49465 and its major metabolite in healthy volunteers (1985)
    Springer
    European journal of clinical pharmacology 28 (1985), S. 659-664 
    Details
    ISSN: 1432-1041
    Keywords: BTS 49465 ; hypertension ; pharmacokinetics ; blood pressure effect ; heart rate effect ; side-effects ; healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The pharmacokinetic and haemodynamic effects of a 200 mg oral dose of BTS 49465 (7-fluoro-1-methyl-3-methylsulphinyl-4-quinolone) were investigated in a double-blind placebo controlled study. BTS 49465 was rapidly absorbed and cleared from the systemic circulation with a half-life of 1.6 h by oxidation to the sulphone metabolite. The metabolite was cleared with a half-life of 37.6 h. Saliva concentrations of both BTS 49465 and its metabolite correlated well with the plasma concentrations. Compared to placebo, BTS 49465 produced statistically significant reductions in blood pressure and increases in heart rate both supine and after a 60° head up tilt. The time course of the haemodynamic changes suggested that the sulphone metabolite contributed to the overall hypotensive response. Plasma Renin Activity was only marginally elevated and there was no evidence of acute fluid retention. BTS 49465 was well tolerated in terms of haematological and biochemical parameters and subjective side-effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00607911
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  • 5
    Electronic Resource
    Electronic Resource
    The effects of substituting frusemide for a thiazide diuretic in the drug regimens of patients with essential hypertension (1987)
    Springer
    European journal of clinical pharmacology 33 (1987), S. 31-34 
    Details
    ISSN: 1432-1041
    Keywords: thiazide diuretics ; hypertension ; electrolytes ; frusemide ; loop diuretics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Eighteen patients with mild to moderate hypertension on a drug regimen which included a thiazide diuretic had the latter substituted by frusemide for twelve weeks after an initial two-week placebo wash-out period. Blood pressure and heart rate and a number of plasma and urinary biochemical indices were measured. Significant findings included a reduction in standing blood pressure and an elevation of plasma sodium, potassium, chloride, osmolarity, creatinine and alkaline phosphatase levels at the end of the twelve week frusemide phase relative to the values on the thiazide. However the means for all the biochemical indices remained within the normal laboratory reference limits. In the 24-hour urinary studies, no significant findings emerged, apart from an elevated calcium. The foregoing suggest that frusemide is an effective component of an anti-hypertensive drug regimen and that in a dose of 40 mg/day it produces no detectable perturbations of plasma electrolytes. The significance of the enhanced levels of urinary calcium excretion in conjunction with the augmented plasma alkaline phosphatase is unclear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00610376
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  • 6
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    Analysis of sediments at Domes Site A, Pacific Ocean (1987)
    PANGAEA
    In:  Supplement to: Piper, David Z; Rude, P D; Monteith, S (1987): The chemistry and mineralogy of haloed burrows in pelagic sediment at DOMES Site A: The equatorial North Pacific. Marine Geology, 74(1-2), 41-55, https://doi.org/10.1016/0025-3227(87)90004-1
    Details
    Publication Date: 2023-08-28
    Description: The chemical and mineralogical composition of burrowed sediment, recovered in 66 box cores at latitude 9°25'N and longitude 151°15'W in the equatorial Pacific, demonstrates the important role of infauna in determining the geochemistry of pelagic sediment. Haloed burrows, approximately 3 cm across, were present in many of the cores. Within early Tertiary sediment that was covered by less than 5 cm of surface Quaternary sediment in several cores, the burrows in cross-section consist of three units: (1) a dark yellowish-brown central zone of Quaternary sediment surrounded, by (2) a pale yellowish-orange zone (the halo) of Tertiary sediment, which is surrounded by (3) a metal-oxide precipitate; the enclosing Tertiary sediment is dusky brown. Several elements - Mn, Ni, Cu, Co, Zn, Sb and Ce - have been leached from the light-colored halo, whereas Cr, Cs, Hf, Rb, Sc, Ta, Th, U, the rare earth elements exclusive of Ce, and the major oxides have not been leached. The metal-oxide zone, 1-5 mm thick, contains as much as 16% MnO2, as the mineral todorokite. The composition of the todorokite, exclusive of the admixed Tertiary sediment, resembles the composition of the metal deficit of the halo and also the composition of surface ferromanganese nodules that have been interpreted as having a predominantly diagenetic origin. Thus bioturbation contributes not only to the redistribution of metals within pelagic sediment, but also to the accretion of ferromanganese nodules on the sea floor.
    Keywords: NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 7
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    Unknown
    Description and chemical composition of ferromanganese encrustations and deposits in the Atlantic Ocean from R/V Atlantis II cruises 20, 42, 60, 85; R/V Chain cruise 35; R/V Knorr cruise 61 and RRS Shackleton cruise 75/1 stations (1987)
    PANGAEA
    In:  Supplement to: Goddard, D A; Thompson, G; Jones, E J W; Okada, H (1987): The chemistry and mineralogy of ferromanganese encrustations on rocks from the Sierra Leone Rise, equatorial Mid-Atlantic Ridge and New England Seamount Chain. Marine Geology, 77(1-2), 87-98, https://doi.org/10.1016/0025-3227(87)90084-3
    Details
    Publication Date: 2023-09-29
    Description: Chemical and mineralogical compositions of ferromanganese oxide coatings on rocks dredged from the New England Seamounts, the Sierra Leone Rise and the Mid-Atlantic Ridge near the Equator have been determined in an investigation of regional differences in Atlantic ferromanganese deposits. Most encrustations are clearly of hydrogenous origin, consisting mainly of todorokite and delta MnO2, but several recovered from the equatorial fracture zones may be hydrothermal accumulations. Differences in the chemistry of the water column and in growth rates of the ferromanganese coatings may be important in producing this regional contrast in composition. Fine-scale changes in element abundances within the encrustations indicate that the nature of the substrate has little influence on compositional variations.
    Keywords: NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 8
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    Unknown
    Description and illustrations of Mn deposits from the John Murray Expedition (R/V Mabahiss) (1937)
    PANGAEA
    In:  Supplement to: Wiseman, J D H (1937): Basalts from the Carlsberg Ridge, Indian Ocean. In: Geological and Mineralogical Investigations, The John Murray Expedition 1933-1934 - Scientific Reports. British Museum ( Natural History ), London, United Kingdom, 3(1), 2-31, hdl:10013/epic.46160.d006
    Details
    Publication Date: 2023-08-28
    Description: During the cruise of the" Mabahiss" from Zanzibar to Colombo at Station 133 (1° 25' 54" S. to 1° 19' 42" S. and 66° 34' 12" E. to 66° 35' 18" E.) several small rock fragments were brought up in the Monegasque net; and, since at this position there is no possibility of the material being transferred by floating Ice, these specimens are of some interest as samples of oceanic rock foundations. All the rocks have a black appearance, but in the majority this skin is of negligible thickness. Exceptionally, however, it may attain to 1/3 in. (St. 133, 8), and then the specimens are rounded. The coating is made of dark opaque manganese material. At Station 166 one or two similar specimens of angular basalt were found in the trawl consisting mainly of manganese nodules.
    Keywords: NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 9
    Electronic Resource
    Electronic Resource
    The efficacy and tolerability of atenolol, nifedipine, and their combination in the management of hypertension (1988)
    Springer
    European journal of clinical pharmacology 34 (1988), S. 543-548 
    Details
    ISSN: 1432-1041
    Keywords: atenolol ; nifedipine ; hypertension ; adverse effects ; fixed combination ; drug efficacy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In this randomized, double-blind, crossover study we investigated the haemodynamic effects of a beta-blocker (atenolol 50 mg) and a calcium antagonist (nifedipine SR 20 mg) given either separately or in combination in three groups of hypertensive patients. Each treatment was administered twice daily. The fixed combination given twice daily for four weeks produced reductions in blood pressure which lasted for at least 12 h after administration of the last dose. The control of blood pressure by the combination was superior to that achieved by its individual components. Adverse effects normally associated with nifedipine were less frequent when it was given with atenolol. Compliance with treatment was good, but best when the drugs were given together rather than separately. A fixed combination of atenolol and nifedipine may prove useful in treating hypertensive patients inadequately controlled on beta-blocker therapy alone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00615215
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  • 10
    Electronic Resource
    Electronic Resource
    Doxazosin in patients with hypertension (1988)
    Springer
    European journal of clinical pharmacology 35 (1988), S. 21-24 
    Details
    ISSN: 1432-1041
    Keywords: doxazosin ; hypertension ; alpha-adrenergic blockade ; bioavailability ; pharmacokinetics ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The antihypertensive effects and steady-state pharmacokinetics of doxazosin, as well as the bioequivalence of four dosage forms, were studied in 25 hypertensive patients. For an 8 mg daily dose mean Cmax at steady-state for all patients was 108 ng/ml; the mean tmax was 1.8 h. The mean terminal elimination half-life was 22 h. The four tablets containing 1, 2, 4, or 8 mg of doxazosin were bioequivalent in delivering the 8 mg dose. In patients with mild to moderate hypertension, 26-day treatment with doxazosin resulted in blood pressure reduction of 10/7 mm Hg in the supine and 13/18 mm Hg in the standing position. Adverse effects were generally mild and of brief duration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00555502
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