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At least 217 records · Page 12Linked to original sources
PubMedDate not supplied

[SMC-electrophoresis of peat mud in the treatment of patients with duodenal ulcer in outpatient care unit].

To study collagen metabolism in reparative regeneration of duodenal ulcer in response to peat mud electrophoresis of Uva sanatorium using sinusoidal modulated currents (SMC) as monotherapy in a day hospital, 82 duodenal ulcer patients in exacerbation or attenuation were examined. They received SMC-electrophoresis of peat mud diluted by sulfate sodium-calcium mineral water Uvinskaya of moderate mineralization. The dynamics of clinico-endoscopic and morphological picture of the disease was controlled with fibrogastroduodenoscopy with target biopsy of the periulcer zone and antral stomach, investigation of secretory and acid-producing function of the stomach, hormone profile and collagen metabolism. Positive changes were found attributed to favourable shifts in the hormone status and normalization of collagen metabolism in duodenal mucosa.

Adult↗
PubMed1997

[Influence of extraction on fluorescence of the subrenite in the peat].

Comparative study on the subrenite in the peat and extracted remain has been made. The study reveals that extraction has considerable influence on the fluorescence of the subrenite. Before extracted, the subrenite in the peat gives out violently fresh yellowish green to green fluorescent light ,and the lambda(max), ranges from 470 to 520nm and the Q650/500 from 0.10 to 0.65, but after extracted, the subrenite in the extrated remain gives out weakly dark yellow to orange-yellow fluorescent light and the lambda(max) ranges from 605 to 660nm and the Q650/500 from 1.85 to 4.09. The extraction has made the fluorescent intensity of the subrenite weak.

English Abstract↗
PubMedDate not supplied

[Bacteria of the genus Burkholderia as a typical component of the microbial community of sphagnum peat bogs].

Bacteria of the genus Burkholderia are a typical component of the microbial complex of sphagnum peat bogs and constitute a substantial portion of the aerobic chemoorganotrophic isolates which are routinely obtained from these environments on acidic nutrient media. The ecophysiological characteristics of the 27 strains of such organisms, which were isolated from the peat of acidic sphagnum bogs of the boreal and tundra zones of Russia, Canada, and Estonia, were investigated in the present paper. The overwhelming majority of the Burkholderia strains isolated from these bogs were phylogenetically close to the species B. glathei, B. phenazinium, B. fungorum, and B. caryophylli, the typical inhabitants of soil and plant rhizosphere. The bog isolates utilized a broad range of substrates as carbon and energy sources, including organic acids, sugars, polyalcohols, and certain aromatic compounds. All the strains studied were capable of growth on nitrogen-free media. They developed in the pH ranges of 3.5 to 7.4 and from 3 to 37 degrees C, with the optima at pH 5-7 and 11-23 degrees C, respectively. They were therefore moderately acidophilic, psychroactive, dinitrogen-fixing microorganisms well adapted to the conditions of acidic northern sphagnum bogs.

Burkholderia↗
PubMedDate not supplied

[Efficacy of SMC-electrophoresis of peat mud in primary chronic duodenitis].

Sinusoidal modulated current (SMC) electrophoresis of peat mud was used as monotherapy of primary chronic duodenitis in Uva sanatorium. A total of 65 patients with primary chronic duodenitis received SMC electrophoresis of peat mud diluted with distilled water. The effect was followed up with fibrogastroduodenoscopy and target biopsy of duodenal mucosa with further study of its morphological structure and element composition, acid-producing function of the stomach, hormonal profile, collagen metabolism. Positive changes were observed in clinical-endoscopic and morphological picture of the disease which is explained by favourable shifts in hormonal status and normalization of collagen metabolism in duodenal mucosa.

Adult↗
PubMedDate not supplied

[Effect of salt supplements on lipid growth and synthesis by yeast cultivated on peat oxidates].

The accumulation of biomass and lipids and their fatty acid composition were investigated during cultivation of the yeast Candida tropicalis and Lipomyces lipoferus on peat oxidates supplemented with inorganic compounds containing nitrogen, phosphorus, potassium and magnesium. The absence of additional sources of the above elements from the nutrient substrate inhibited the culture growth. In order to optimize cultivation of lipid synthesizing yeast on peat oxidates, the above compounds should be added in certain concentrations.

Ascomycota↗
PubMed1994

[The influence of natural peat and isolated humic acid solution on certain indices of metabolism and of acid-base equilibrium in experimental animals].

The biological effect in rats treated with natural peat homogenate and isolated humic acids has been shown in pharmacodynamic studies. After 24 days of this treatment decrease of total cholesterol, total lipids, an increase of HDL fraction of cholesterol, decrease in glucose level and increase of protein fraction of globulin, hemoglobin, hematocrit and total number of erythrocytes were observed. The treatment did not influence the electrolyte equilibrium. However, after the treatment with humic cides the respiratory acidosis not compensated with the metabolic component was observed. The activity of the natural peat was more favorable as compared to the activity of humic acids solution.

Acid-Base Equilibrium↗
PubMed1993

The dose-dependent effect of Tołpa Peat Preparation on the humoral response of mice immunized with sheep erythrocytes.

The Balb/c strain mice were immunized by single intraperitoneal administration of 0.2 cm3 of 10% sheep erythrocyte suspension (SRBC). Tołpa Peat Preparation (TPP) used in the study was a peat-derived substance obtained in prof. St. Tołpa's laboratory. It was given to mice intraperitoneally, 4 times at 24-hour intervals. The first dose was administered 2 hours before immunization. Testing was performed with the following doses: 0.5, 2.5, 5, 10, 25, 50, 100 and 250 mg/kg. The determinations comprised the number of spleen cells producing anti-SRBC haemolysins, the level of serum haemagglutinins to SRBC (19S+7S and 7S types) and the percentage of splenocytes forming spontaneous E-rosettes. It was found that the effect of TPP on these immunologic parameters of the mice immunized with SRBC was dose-dependent. The effect potentiating the humoral response occurred for the doses of 0.5-10 mg/kg. The doses of 25 and 50 mg/kg did not affect the immunologic response to SRBC, while the doses of 100 and 250 mg/kg had a suppressive effect. The impact of TPP on the percentage of splenocytes forming E-rosettes was also dose-dependent, but in this case stimulating activity was observed for the doses of 2.5-25 mg/kg.

Adjuvants, Immunologic↗
PubMed2002

Identification of compound classes in soil and peat fulvic acids as observed by electrospray ionization tandem mass spectrometry.

Soil and peat fulvic acids obtained from the International Humic Substances Society were fractionated by their solubility in methanol and analyzed by electrospray ionization tandem mass spectrometry. Precursor and product ion experiments produced mass spectra that indicated the presence of benzene, phenol, dihydroxy benzene, furan and thiophene carboxylic acids. Standards were used to substantiate the fragmentation patterns observed in the product ion spectra of the fulvic acid samples. This study makes significant progress into the direct identification of individual compounds in humic substances using a non-degradation technique.

Benzopyrans↗
PubMed1999

Adsorption of Nitrogen on Thermally Treated Peat Soils: The Role of Energetic and Geometric Heterogeneity.

We investigate adsorption isotherms of nitrogen at 80 K on several peat soils. In addition to natural soil samples we also study samples thermally treated at 50, 100, and 150 degrees C. The experimental adsorption isotherms are used to evaluate the surface fractal dimension and the energy distribution functions. Moreover, for some samples we have also determined the pore size distributions from mercury intrusion data. We compare the surface fractal dimensions evaluated from the mercury intrusion data and from adsorption isotherms and discuss how the thermal treatment changes the energetic heterogeneity of the samples. Copyright 1999 Academic Press.

Journal Article↗
PubMed1990

Influence of environmental factors on 2,4-dichlorophenoxyacetic acid degradation by Pseudomonas cepacia isolated from peat.

A Pseudomonas cepacia, designated strain BRI6001, was isolated from peat by enrichment culture using 2,4-dichlorophenoxyacetic acid (2,4-D) as the sole carbon source. BRI6001 grew at up to 13 mM 2,4-D, and degraded 1 mM 2,4-D at an average starting population density as low as 1.5 cells/ml. Degradation was optimal at acidic pH, but could also be inhibited at low pH, associated with chloride release from the substrate, and the limited buffering capacity of the growth medium. The only metabolite detected during growth on 2,4-D was 2,4-dichlorophenol (2,4-DCP), and degradation of the aromatic nucleus was by intradiol cleavage. Growth lag times prior to the on-set of degradation, and the total time required for degradation, were linearly related to the starting population density and the initial 2,4-D concentration. BRI6001, grown on 2,4-D, oxidized a variety of structurally similar chlorinated aromatic compounds accompanied by stoichiometric chloride release.

2,4-Dichlorophenoxyacetic Acid↗
PubMed2002

The Langmuir two-surface equation as a model for cadmium adsorption on peat: a new method of the calculation of equation constants.

The Langmuir isotherm equation is often used to describe the adsorption of cadmium on peat. If the total surface consists of two or more populations of sites with different bonding energies, it is proposed that the Langmuir two-surface equation be used. The effects of the contact time and pH on adsorption were investigated in batch experiments. Adsorption batch isotherm studies were carried out by using 12 solutions with initial concentrations of 5-110 mg/l. The samples were analysed by using axial ICP-AES. Adsorption data were compared using four different linearizations (Lineweaver-Burk, Eadie-Hofstee, Scatchard and Langmuir linearizations). Better results among linearizations were found with the Langmuir linearization, but the results obtained by using the nonlinear regression were still the best. A new, nonlinear regression method for the calculation of the equation constants was created by using the system of equations and these findings were compared to the results found using earlier methods.

Adsorption↗
PubMed2000

Changes in the physiological and agricultural characteristics of peat-based Bradyrhizobium japonicum inoculants after long-term storage.

Commercial soybean inoculants processed with sterilised peat and stored at 20 degrees C for 1-8 years were used as experimental materials to assess the changes in the physiological activity of Bradyrhizobium japonicum after storage. Viable counts decreased and physiological characteristics of the bacterium changed during storage, with an increase in the time taken for colony appearance on a medium without yeast extract, an increase in the lag time for nodule appearance on soybean grown in glass tubes and a decrease in survival on seeds. All the inoculants produced a significant increase in grain yield in a field experiment. The percentage of efficient cells in the field (relative to the plate counts) decreased as the length of storage increased. These results suggest that the physiological activity of B. japonicum cells changes after storage. Practical implications for inoculant quality control are discussed.

Bradyrhizobium↗
PubMed1984

Extended hopanoids in peat environments.

Detailed results are presented for the distributions of triterpenoid alkanes, acids and alcohols of the hopane family in ten samples of peat from three environments, and of contributing organisms in the case of Lyne of Skene, Scotland. Extended hopanoids of the beta alpha and alpha beta configuration appear at the very earliest stage of diagenesis. Such environments appear to be characterised by particular distributions of C32 hopanoid acids and alcohols, and a high preponderance of the C31 alpha beta hopane.

Acetates↗
PubMed1988

Multi-component sorption isotherms of basic dyes onto peat.

The adsorption of basic dyes onto peat from single component and multi-component solution is reported. The adsorption is presented in the form of the equilibrium isotherms. The Freundlich, Langmuir and Redlich-Peterson isotherm equations are fitted to the results and the isotherm constants obtained.

Journal Article↗
PubMed1993

Assessment by laboratory simulation of approaches to amelioration of peat acidification.

The effects of different liming materials (CaCO(3), Ca(OH)(2), CaHPO(4), and dolomite) on soil and drainage-water chemistry have been investigated for upland acidic peats by using a soil-core-simulation experiment. Intact cores from three depths (0-30, 0-60, and 0-90 mm) were subjected to ten years of simulated rainfall. Drainage water was periodically analysed for Ca(2+), Mg(2+), Na(+), K(+) NH(4)(+), TOC, Cl(-), SO(4)(2-), NO(3)(-), PO(4)(3-), and pH, and at the end of the experiment the cores were destructively sampled and analysed. Temporal changes in soil and drainage-water chemistry are used to evaluate the advantages and disadvantages of using different liming materials for the amelioration of soil and drainage-water chemistry.

Journal Article↗
PubMed1994

The use of peat in the historical monitoring of trace metals in the atmosphere.

The concentrations of lead, zinc, copper, manganese, cadmium and calcium have been measured in three peat bogs. The distribution of Pb, Zn, Mn and Ca are dependent on the position and fluctuations of the water table. They all become depleted in the waterlogged, anaerobic zone. Copper and cadmium are uniformly distributed and appear to be immobilised, probably by the formation of metal/organic complexes, and independent of the acid and redox conditions existing in the bogs. The use of the concentration profiles of the metal ions as a means of historical monitoring of trace metal contamination is complex for Pb, Zn, Mn and Ca but may be more straightforward for Cu and Cd.

Journal Article↗
PubMed2004

Advanced bioconversion of biowaste for production of a peat substitute and renewable energy.

Traditional composting systems for biowaste generally produce low quality composts that may endanger recycling. A pilot-scale bioconversion process yielding quality compost and renewable energy was designed and tested. The process consisted of a set of wet physical separation units, composting and anaerobic digestion. Biowaste was divided in four streams by physical separation: (1) organic fraction >2 mm, (2) inorganic fraction 0.05-2 mm, (3) residual fraction composed of organics 0.05-2 mm and the fraction <0.05 mm and (4) a fraction solubilised in the washing water. The organic fraction >2 mm was composted and the compost, high in organic matter and low in EC and heavy metals, aimed at replacing peat in horticulture. The inorganic fraction 0.05-2 mm was completely made up of sand and can be used as a construction material. Solubilised organic matter in the washing water was converted to CH(4) by anaerobic digestion. The residual fraction can be used as landfill cover material.

Bacteria, Anaerobic↗