Publications by authors named "Graefe U"

Article Synopsis
  • - The study investigates how introducing temporary grassland into annual crop rotations impacts five key soil ecosystem services, including soil structure maintenance, water regulation, biodiversity conservation, pathogen regulation, and forage production and quality.
  • - Three different crop rotation schemes were tested over twelve years, varying the percentage of grassland—0%, 50%, and 75%—to observe the effects on soil and ecosystem services.
  • - Results indicated that increasing the grassland proportion improved soil structure and biodiversity but did not significantly affect water regulation, pathogen control, or forage production; higher grassland percentages showed stronger positive impacts on soil maintenance and biodiversity.
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Background & Aims: Point of care tests (POCTs) might be used to identify patients with undiagnosed celiac disease who require further evaluation. We performed a large multicenter study to determine the performance of a POCT for celiac disease and assessed celiac disease prevalence in endoscopy centers.

Methods: We performed a prospective study of 1055 patients (888 adults; median age, 48 yrs and 167 children; median age, 10 yrs) referred to 8 endoscopy centers in Germany, for various indications, from January 2016 through June 2017.

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A checklist of the German earthworm fauna (Oligochaeta: Lumbricidae) is presented, including published data, data from reports, diploma- and PhD- theses as well as unpublished data from museum collections, research institutions and private persons. Overall, 16,000 datasets were analyzed to produce the first German checklist of Lumbricidae. The checklist comprises 46 earthworm species from 15 genera and provides ecological information, zoogeographical distribution type and information on the species distribution in Germany.

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Lecanoric acid (1), orsellinic acid methyl ester (2), orcinol (3), and usnic acid (4) were isolated from the lichen Parmelia subrudecta, collected on Palma of the Canary Islands, Spain. Compounds 1, 2, 3, and 4 were purified by solvent extraction, silica gel column chromatography, and preparative high-performance liquid chromatography (HPLC) consecutively. The structures of the four compounds were elucidated by one- and two-dimensional nuclear magnetic resonance (NMR) experiments and mass spectrometric investigations.

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The fungus, Tritirachium sp. HKI 0317, was isolated from the Antarctic lichen Neuropogon sp. Fermentation of this strain, extraction of the culture broth, and preparative separation of produced compounds furnished 4-carboxy-5,5'-dihydroxy-3,3'-dimethyldiphenylether (1), macrosphelide A (2), and macrosphelide J (3).

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The use of herbs for treating various ailments dates back several centuries. Usually, herbal medicine has relied on tradition that may or may not be supported by empirical data. The belief that natural medicines are much safer than synthetic drugs has gained popularity in recent years and led to tremendous growth of phytopharmaceutical usage.

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Background And Objective: Clinical sedation assessment becomes insufficient in deeply sedated patients. Bispectral index as a processed electroencephalogram parameter provides a continuous and observer-independent value reported to change with sedation. The aim of this prospective observational study was to determine the reliability and possible confounding factors of the bispectral index to assess sedation in surgical intensive care patients.

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Article Synopsis
  • Hyperhomocyst(e)inemia is a significant risk factor for atherosclerosis, particularly in hemodialysis patients who often have high serum homocyst(e)ine levels.
  • A study tested the effects of varying doses of folate, cobalamin, and pyridoxal phosphate on serum homocyst(e)ine in 33 hemodialysis patients over eight weeks.
  • The findings showed that increased administration of cobalamin significantly raised its serum levels and reduced homocyst(e)ine levels, indicating that cobalamin plays a crucial role in managing homocyst(e)ine levels in these patients.
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Background: Hyperhomocysteinemia has been increasingly recognized as an important risk factor for elevated atherosclerotic vascular disease in chronic renal failure. We measured in patients with chronic renal failure homocysteine and metabolites of its 2 metabolic pathways, transulfuration (cystathionine, cysteine) and remethylation (methionine, methylmalonic acid, 2-methylcitric acid).

Patients And Methods: Eleven patients on conservative treatment (creatinine clearance 10 to 30 ml/min) and 50 chronic uremic subjects on regular hemodialysis were included in the study.

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Article Synopsis
  • The study measured serum levels of homocysteine and related metabolites in 40 nondialyzed and 50 hemodialysis patients, assessing the impact of vitamin supplementation.
  • Positive correlations were observed between creatinine and metabolite levels, particularly indicating strong relationships between homocysteine and cystathionine, cysteine, and other metabolites.
  • Hemodialysis patients receiving vitamin supplements showed significantly lower levels of homocysteine and cystathionine compared to those not receiving supplements, highlighting the lack of effective remethylation in chronic renal disease.
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The objective of this study was to examine if hyperhomocysteinemia is associated with occlusive vascular disease in hemodialysis patients. The study design included risk factor analysis and determination of serum homocysteine in hemodialysis patients. Fifty chronic uremic patients on regular hemodialysis treatment were studied.

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1. Calcium concentration and Ca(2+)-ATPase activity under basal conditions and after maximal stimulation with calmodulin were measured in erythrocytes from 32 patients with end-stage renal failure on haemodialysis and from 27 healthy subjects. 2.

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In a homogeneous group of 467 cadaver kidney transplants performed within one single center between 1979 and 1987, we analysed the influence of main risk factors on long-term survival up to 72 months. Calculating survival rates by Kaplan-Meier actuarial methods the overall graft survival exceeded 71%. The corresponding patient survival was higher than 90%.

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The methylester of griseochelin (1) is a new chemically-made antiviral derivate of the antibiotic griseochelin isolated from fermentations of Streptomyces griseus. It belongs to the polyether group and possesses antiviral activity against enveloped RNA and DNA viruses cultivated in chicken embryo cells (CEC), namely influenzavirus A/WSN, vesicularstomatitis virus (Indiana), vaccinia virus (Lister) and herpes simplex hominis virus type 1 (Kupka). The methylester of griseochelin failed to show virucidal effects on extracellular influenza vacciniavirus particles or to influence virus adsorption and penetration processes.

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Deposits of calcium salts in the conjunctivas and corneas of 72 patients showed a statistically significant correlation to the duration of hemodialysis. The deposition of calcium salts is not influenced by other signs of disturbed calcium metabolism (Ca-PO4 product, alkalic phosphatase) or the patient's age.

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After a historical review of the dialytic technics for correction of acidosis, the advantages of bicarbonate dialysis are stressed specially as regards the greater hemodynamic stability that it secures when short but highly efficient dialysis are performed and as regards its lowering effect on the blood triglycerides levels.

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