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  • Articles  (162)
  • Column liquid chromatography  (88)
  • adverse effects  (37)
  • maize  (37)
  • Springer  (162)
  • American Chemical Society (ACS)
  • 2015-2019
  • 2005-2009
  • 1990-1994  (162)
  • 1980-1984
  • 1991  (162)
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  • Articles  (162)
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  • 2015-2019
  • 2005-2009
  • 1990-1994  (162)
  • 1980-1984
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  • 1
    Electronic Resource
    Electronic Resource
    Oviposition by the African migratory locust, Locusta migratoria migratorioides, in a crop environment in South Africa (1991)
    Springer
    Entomologia experimentalis et applicata 61 (1991), S. 169-177 
    Details
    ISSN: 1570-7458
    Keywords: African migratory locust ; crop environment ; oviposition behaviour ; oviposition sites ; maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Oviposition by the African migratory locust, Locusta migratoria migratorioides (Orthoptera: Acrididae), was studied in maize and wheat crops on the Orange Free State Highveld. Maize was shown to be the most important oviposition habitat with peak laying taking place in autumn and early winter when highest pod densities were recorded. Laying was mainly concentrated along the middle of the crop interrows in maize and within clearings in the wheat crop. Despite the uniform layout of these crops, the distribution of egg pods was found to be aggregated. Non-reproductive behaviour, such as locust aggregation, basking and feeding, as well as environmental factors appeared to influence the distribution of egg pods in these crops. Secondary selection for optinum soil moisture and compaction on the laying site enhanced the aggregation of pods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00191747
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  • 2
    Electronic Resource
    Electronic Resource
    Mycotoxin production by Fusarium species isolated from New Zealand maize fields (1991)
    Springer
    Mycopathologia 113 (1991), S. 35-40 
    Details
    ISSN: 1573-0832
    Keywords: Fusarium ; maize ; moniliformin ; mycotoxins ; trichothecenes ; zearalenone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Forty Fusarium isolates obtained from maize fields were screened for moniliformin production on maize kernels. Twelve isolates, including seven of F. subglutinans, were found to produce moniliformin at levels ranging from 0.4 to 64 ppm. Twenty six isolates were also screened for production of deoxynivalenol, diacetoxyscirpenol, T-2 toxin and zearalenone. Of these, 22, including all 11 isolates of F. graminearum, produced zearalenone at levels ranging from 0.1 to 96.0 ppm, while 13 produced T-2 toxin at low levels, (〈1.1 ppm). Deoxynivalenol and diacetoxyscirpenol were each produced by six isolates, also at low levels (〈1.0 ppm). Three isolates of F. graminearum and one of F. sambucinum produced four toxins simultaneously.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00436385
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  • 3
    Electronic Resource
    Electronic Resource
    The effects of two centrally-acting anti-hypertensive drugs on the quality of life (1991)
    Springer
    European journal of clinical pharmacology 41 (1991), S. 397-400 
    Details
    ISSN: 1432-1041
    Keywords: Antihypertensive therapy ; Quality of life ; centrally-acting drugs ; clinical trials ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The objectives of this study were to compare the effects of two centrally-acting antihypertensive drugs on measures of quality of life in a three-month double-blind trial of hypertensive patients randomized to methyldopa (n=79) or rilmenidine (n=78). We studied men and women aged over 21 y attending eight hospital out-patient clinics in the United Kingdom. They had average diastolic blood pressures between 95 and 110 mm Hg and systolic pressures below 210 mm Hg after a 4-week placebo run-in period. The doses ranged from 1 to 2 mg daily of rilmenidine and 500 mg to 1 g of methyldopa. Hydrochlorothiazide (25 mg daily) was added after 8 weeks when the diastolic blood pressure remained at 90 mm Hg or more in 29% of patients on rilmenidine and 35% of those on methyldopa. Quality of life was assessed from self-completed questionnaires using standardized instruments. Both drugs reduced blood pressure, but at the end of the trial the fall in the methyldopa group (19.3/13.0 mm Hg) was significantly greater than in the rilmenidine group (13.2/10.0 mm Hg). Ten patients in the methyldopa group withdrew from the trial compared with three in the rilmenidine group, primarily because of adverse effects. In both groups there was a significant increase in the overall reporting of adverse effects. Reports of dry mouth increased on both drugs, and sleepiness on rilmenidine but not methyldopa. There was no significant difference between the drugs in the overall reporting of adverse effects or of individual adverse effects. Psychological well-being tended to improve on rilmenidine, but was adversely affected by methyldopa, with increases in reports of depression and cognitive impairment. However, at the end of the trial there were no significant differences in overall psychological well-being between the two groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00626358
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of ampicillin on mefloquine pharmacokinetics in thai males (1991)
    Springer
    European journal of clinical pharmacology 40 (1991), S. 631-633 
    Details
    ISSN: 1432-1041
    Keywords: Mefloquine ; ampicillin ; Thai subjects ; pharmacokinetics ; enterohepatic recycling ; drug interaction ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The kinetics of a single oral dose of mefloquine given either alone or with ampicillin has been studied in 8 healthy Thai male volunteers. There was a significantly higher maximum whole blood mefloquine concentration after coadministration with ampicillin (1648 vs 1228 ng·ml−1), as well as a significantly reduced terminal half life (15.3 vs 17.7 days), mean residence time (20.1 vs 23.4 days) and volume of distribution at steady state (14.1 vs 19.4 l·kg−1). Although there was no significant change in the AUC from zero time to infinity, the AUC from zero time to 5 days was significantly increased by ampicillin (4.86 vs 3.27 μg·ml−1 day). These changes in mefloquine disposition after antibiotic treatment may be due both to an increase in fractional bioavailability and a reduction in the enterohepatic recycling of mefloquine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00279985
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  • 5
    Electronic Resource
    Electronic Resource
    Ambulatory blood pressure monitoring in elderly hypertensives treated with the new calcium antagonist, nilvadipine (1991)
    Springer
    European journal of clinical pharmacology 41 (1991), S. 255-257 
    Details
    ISSN: 1432-1041
    Keywords: Nilvadipine ; Hypertension ; elderly patient ; circadian rhythm ; ambulatory blood pressure monitoring (ABPM) ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary. A newly developed calcium antagonist, nilvadipine, was administered to 7 hypertensive patients aged 75.6 y. Nilvadipine 4 mg b.d. decreased the average 24-h blood pressure significantly from 169/89 mm Hg to 152/81 mm Hg after 7 to 14 days without any change in the pulse rate. The circadian patterns of blood pressure and pulse rate were not affected by nilvadipine. Although the present study was a preliminary one done over a short period in a small number of patients, the results suggest that nilvadipine exerts an antihypertensive effect without altering the circadian pattern or the variability of blood pressure in elderly hypertensive patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00315439
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  • 6
    Electronic Resource
    Electronic Resource
    Prospective comparative study in NIDDM patients of metformin and glibenclamide with special reference to lipid profiles (1991)
    Springer
    European journal of clinical pharmacology 41 (1991), S. 263-265 
    Details
    ISSN: 1432-1041
    Keywords: Metformin ; Glibenclamide ; NIDDM ; lipoproteins ; C-peptide ; diabetes mellitus ; adverse effects ; serum lipids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary. Twenty-two NIDDM patients completed an open randomized cross-over study comparing metformin and glibenclamide over 1 year. The drugs had an equivalent effect on glycaemic control, but, in contrast to glibenclamide, metformin reduced body weight. Neither drug affected triglycerides, total-and LDL-cholesterol or C-peptide. Metformin caused a slight elevation of HDL-cholesterol (P 〈 0.05). No serious adverse effects were observed. The results show that oral hypoglycaemic agents are not associated with undesirable effects on lipids and lipoproteins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00315441
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  • 7
    Electronic Resource
    Electronic Resource
    Plasma level monitoring of mitotane (o,p'-DDD) and its metabolite (o,p'-DDE) during long-term treatment of cushing's disease with low doses (1991)
    Springer
    European journal of clinical pharmacology 41 (1991), S. 259-261 
    Details
    ISSN: 1432-1041
    Keywords: Cushing's disease ; Mitotane ; o,p'-DDD ; long term treatment ; plasma monitoring ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary. Mitotane (o,p'-DDD) can be used for the treatment of various adrenocortical diseases such as Cushing's syndrome, but the usual doses of 6–8 g per day are often associated with severe adverse effects. This paper reports the results of much lower doses of o,p'-DDD (0.5–2 g per day) in two patients with Cushing's disease over periods of 8 and 5 years, respectively, under concomitant monitoring of the plasma levels of the parent drug and its major metabolite, o,p'-DDE. It became apparent that o,p'-DDD and o,p'-DDE have a strong tendency to accumulate in the body due to their high lipophilicity. As a consequence, changes in dose regimens had long lag times before they were reflected in plasma levels and once an increase or decrease had started one had to be careful not to cause overshoot. Steady state plasma levels of o,p'-DDD between 5–10 μg/ml appeared sufficient to induce and to maintain remission of the disease, which was accompanied with normal cortisol levels in plasma and urine. DDD-levels below 5 μg/ml for several weeks may lead to relapses, whereas DDD-levels over 10 μg/ml gave rise to side effects. On the other hand, o,p'-DDE seemed inactive at levels up to 4 μg/ml in plasma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00315440
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  • 8
    Electronic Resource
    Electronic Resource
    Buccal versus intravenous nitroglyerin in unstable angina pectoris (1991)
    Springer
    European journal of clinical pharmacology 41 (1991), S. 5-9 
    Details
    ISSN: 1432-1041
    Keywords: Unstable angina pectoris ; Buccal nitroglycerin ; intravenous nitroglycerin ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The clinical syndrome of unstable angina includes patients with the first onset of angina, change in a previous stable pattern or the development of chest pain at rest. Administration of intravenous nitroglycerin is established therapy in unstable angina. Buccal nitroglycerin has been introduced as an alternative means of administering nitroglycerin, which provides relief of anginal pain within 2 to 3 min and a sustained effect for 3 to 5 h. Twenty-nine patients admitted to the coronary care unit due to unstable angina were randomized to receive treatment with nitroglycerin i.v. for 24 h or buccal nitroglycerin every 4 h. Therapy was titrated according to haemodynamic effects. The mean dose of buccal nitroglycerin was 4.42 mg versus 0.45 ug·kg−1·min−1 in the intravenous group. The efficacy of treatment was similar in the two groups. Buccal nitroglycerin appeared to cause fewer adverse effects, especially less haemodynamic intolerance and headache, although the differences were not significant. Repeated administration of buccal nitroglycerin appears to be a safe and well tolerated alternative to high-dose i.v. nitroglycerin treatment in unstable angina pectoris.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00280098
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  • 9
    Electronic Resource
    Electronic Resource
    Relationship between renal function and disposition of oral cefixime (1991)
    Springer
    European journal of clinical pharmacology 41 (1991), S. 579-583 
    Details
    ISSN: 1432-1041
    Keywords: Cefixime ; renal failure ; pharmacokinetics ; volunteers ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The pharmacokinetics of cefixime following a single oral dose of 200 mg have been investigated in 6 normal subjects and in 22 patients with various degrees of renal insufficiency. Serum and urine samples were collected between 0 and 72 h and were subjected to two methods of analysis: bioassay and HPLC. There was a linear relationship between the two sets of results from 228 samples. This result suggests that none of the metabolites, which may accumulte in uraemic patients, has antibacterial activity. In normal subjects, the peak serum level (Cmax) was 2.50 μg·ml−1 at 2.83 h (tmax); the apparent elimination half-life (t1/2) was 3.73 h; the apparent total body clearance (CL·f−1) was 154 ml·min−1, the mean renal clearance (CLR) was 39.1 ml·min−1 and the apparent fraction of the dose recovered in 24 h urine was 0.22. In uraemic patients, Cmax and tmax were slightly increased and t1/2 was increased to 12–14 h in patients with an endogenous creatinine clearance below 20 ml·min−1. The apparent volume of distribution was decreased. Apparent total and renal clearances were lower in proportion to the degree of renal insufficiency. Linear relationships were found between CL/f, CLR and creatinine clearance (CLCR). The findings suggest that the dose of cefixime needs to be reduced only in patients with severe renal failure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314988
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  • 10
    Electronic Resource
    Electronic Resource
    Pharmacokinetics of ibuprofen in febrile children (1991)
    Springer
    European journal of clinical pharmacology 40 (1991), S. 427-428 
    Details
    ISSN: 1432-1041
    Keywords: Ibuprofen ; children ; fever ; pharmacokinetics ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Ibuprofen may be an alternative to acetaminophen to control fever in children but little is known about its pharmacokinetics in pediatric patients. We studied 17 patients (age 3–10 yr) with fever; the most prevalent diagnoses were streptococcal pharyngitis and otitis media. Ibuprofen liquid was given as a single dose, 5 mg/kg (9 patients) or 10 mg/kg (8 patients). Multiple blood samples were collected over 8 hours and analyzed by HPLC. The maximum observed serum concentrations of ibuprofen ranged from 17–42 μm·ml−1 at 5 mg·kg−1 and 25–53 μm·ml−1 at 10 mg·kg−1 doses. Pharmacokinetics did not appear to be affected by ibuprofen dose. Mean tmax, oral clearance and elimination half life were 1.1 h, 1.2 ml·min−1·kg−1, and 1.6 h, respectively in patients at 5 mg·kg−1 doses; the corresponding values were 1.2 h, 1.4 ml·min−1·kg−1, and 1.6 h in those receiving 10 mg·kg−1 doses. There was no relationship between age and ibuprofen kinetics. No adverse effects occurred in any patients. These data suggest that ibuprofen pharmacokinetics may not be affected by dose between 5 and 10 mg/kg or age between 3 and 10 years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265858
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