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  • 1
    Electronic Resource
    Electronic Resource
    004
Topical Zinc Oxide for Open Pilonidal Wounds (2005)
    Oxford, UK; Malden, USA : Blackwell Publishing Ltd/Inc.
    Wound repair and regeneration 13 (2005), S. 0 
    Details
    ISSN: 1524-475X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Extended healing time and lack of documented effective treatments of sacrococcygeal pilonidal disease create substantial problems. Locally applied zinc oxide has been reported to promote wound healing. We have compared topical zinc oxide (3%) with placebo meshes for pilonidal wounds healing by secondary intention in a randomized, double-blind, placebo-controlled multicenter trial. Sixty-four consecutive patients, 53 males, aged between 18 and 60 years (median 26 years) with excised pilonidal wounds were centrally randomized to local zinc oxide (30 mg/g, n = 33) or to placebo (n = 31) mesh treatment. Patients were followed with strict recording of beneficial and harmful effects. The median healing times were 54 days (42–71 days, interquartile range, n = 33) for the zinc group and 62 days (55–82 days, n = 31) for the placebo group. This difference was not statistically different (p = 0.32). Based on Cox regression analysis initial wound volume influenced healing negatively (p = 0.016) while smoking (p = 0.011) was associated with faster wound healing. Significantly (p 〈 0.01) more placebo (n = 12) than zinc oxide-treated patients (n = 3) needed antibiotics postoperatively. Although topical zinc oxide increased (p 〈 0.001) wound fluid zinc levels (1830 ± 405 μM, mean ± SEM) compared with placebo (3.1 ± 1.6 μM) serum-zinc levels did not differ significantly between the zinc (13.5 ± 0.4 μM) and placebo (12.8 ± 0.4 μm) groups on postoperative day 7. No adverse events were recorded. Topical zinc oxide treatment did not accelerate time to closure of open pilonidal wounds but was associated with reduced antibiotic usage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1067-1927.2005.130215d.x
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  • 2
    Electronic Resource
    Electronic Resource
    Investigation of the projectile atomic number dependence of the L-subshell ionization
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 4 (1984), S. 311-315 
    Details
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-583X(84)90034-X
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  • 3
    Electronic Resource
    Electronic Resource
    Mass spectrometric determination of gases in plants
    Amsterdam : Elsevier
    Vacuum 34 (1984), S. 757-758 
    Details
    ISSN: 0042-207X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0042-207X(84)90323-3
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  • 4
    Electronic Resource
    Electronic Resource
    Determination of the calcium binding capacity to discriminate between urines of calcium stone formers and healthy persons (1992)
    Springer
    Urological research 20 (1992), S. 101-102 
    Details
    ISSN: 1434-0879
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Calcium binding by undiluted fasting urine has been tested as a means of demonstrating the capacity of urine from control subjects and calcium stone patients to hold spontaneous precipitation of stone forming compounds. Preliminary data are promising with respect to the possibility that controls and patients can be separated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00294350
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  • 5
    Electronic Resource
    Electronic Resource
    DSC studies on the polymorphism and pseudopolymorphism of pharmaceutical substances (1992)
    Springer
    Journal of thermal analysis and calorimetry 38 (1992), S. 1017-1025 
    Details
    ISSN: 1572-8943
    Keywords: pharmaceutical substances ; polymorphism ; pseudopolymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Zur Untersuchung des physikalisch-chemischen Verhaltens binärer Gemische wird ein komplexes System, bestehend aus thermoanalytischen Methoden, IR und Röntgendiffraktion nach dem Debye-Scherrer-Verfahren, beschrieben. Dieses System wurde an binären Gemischen von Amphetaminhydrochloridsalzen getestet. Die Untersuchungen zeigten, daß von den gewählten Verbindungen die Hydrochloride der primären und sekundären Amine eine Tendenz zur Konglomeratbildung zeigen, während die Hydrochloride der tertiären Amine Molekülverbindungen (Racemate) bilden. Für p-Fluoramphetamin-Hydrochlorid wurde die Existenz von zwei polymorphen Modifikationen nachgewiesen.
    Notes: Abstract A complex system including thermoanalytical methods, infrared spectroscopy and X-ray powder diffraction for studying physico-chemical behaviour of binary mixtures is described. This system has been tested by investigating binary mixtures of amphetamine hydrochloride salts. These studies have proved that among the selected compounds the primary and secondary amine hydrochloride salts exhibit conglomerate forming tendency, while the tertiary amine hydrochloride salts form molecular compounds (racemates). For thep-fluoro amphetamine hydrochloride the existence of two polymorphic modifications has been detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01979435
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchung und Bestimmung des Wassergehalts von feindispersen Kieselsäuren (1984)
    Springer
    Journal of thermal analysis and calorimetry 29 (1984), S. 157-166 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ziel der Arbeit war die Entwicklung einer Schnellmethode zur Bestimmung des Wassergehaltes von in der Gummiindustrie als Füll- und Verfestigungsstoffe angewandten Silikaten. Da diese das Wasser teils adsorptiv, teils chemisch gebunden enthalten, wurde durch IR-Untersuchungen verfolgt, wie sich bei unterschiedlichen Bedingungen die Art der Bindung des Wassers verändert. Das physikalisch gebundene Wasser wurde thermometrisch bestimmt. Diese Methode beruht darauf, dass die Wärmetönung der Reaktion zwischen Karl-Fischer-Lösung und Wasser stark exotherm ist und im adiabatischen Kalorimeter die Temperaturveränderung unter geeigneten Bedingungen proportional dem Wassergehalt ist.
    Abstract: Резюме Разработан быстрый м етод определения вла ги в кремневой кислоте, ис пользуемой в резинов ой промышленности в к ачестве ингредиента и активн ого наполнителя. Вода в кремневой кисл оте связана химическ ими и адсорбционными сила ми. Методом ИК спектроскопии изу чено изменение при ра зличных условиях природы так ой связи. Количество физическ и связанной воды было определено прямой термометрией. Метод основан на том, что теп лота реакции между во дой и реактивом Фишера дос таточно большая и при соответствующих усл овиях в адиабатическ ом калориметре изменен ие температуры пропо рционально содержан ию воды в образцах.
    Notes: Abstract The aim of the present work was to develop a rapid method for moisture determination in silicic acid used in rubber industry as a reinforcer and ingredient. Water is bound in silicic acid by chemical and adsorption forces. The changes in the nature of the bond under different conditions were studied by infrared spectroscopy. The amount of the physically bound water was determined by direct thermometry (DIE). The method is based on the phenomenon that the heat of reaction between the Karl Fischer reagent and water is great, and that in an adiabatic calorimeter under appropriate conditions the temperature change is proportional to the water content of the samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02069952
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  • 7
    Electronic Resource
    Electronic Resource
    Identification of two fix loci controlling the expression of nif genes in Rhizobium meliloti 41 (1989)
    Springer
    Molecular genetics and genomics 215 (1989), S. 345-348 
    Details
    ISSN: 1617-4623
    Keywords: Rhizobium ; Symbiosis ; Oxygen regulation ; nif genes ; Fix- mutants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Recently, Fix- mutants of Rhizobium meliloti 41 defective for nifHDK transcription in the bacteroid state have been described. Two of these mutants have been used to identify bacterial genes involved in the regulation of nif gene expression. A nifA::lacZ fusion was introduced into the mutant strains and β-galactosidase activity was assayed in nodule bacteria, as well as in bacteria grown under microaerobic conditions. One of the mutants did not express the nifA gene in symbiosis, suggesting that the gene inactivated by mutation fix-24 is involved in controlling the expression of the nif structural genes via the regulatory gene nifA, The mutation fix-24 also impaired the expression of nifA under microaerobic conditions. These data are in agreement with earlier findings that low oxygen concentration may serve as a signal for nif gene expression in symbiosis. The fix gene marked by the mutation fix-24 might be a positive regulator of nifA expression in R. meliloti 41. The other mutation (fix-25) represented another cluster of fix genes which also affected the expression of nifA. This influence, however, was specific for symbisis. The fix genes (fix-24, fix-25) were localized on the symbiotic megaplasmid pRme41b. The two genes are 10 kb apart from each other and are located at 200 kb downstream of the nif structural genes in R. meliloti 41.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00339740
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  • 8
    Electronic Resource
    Electronic Resource
    Silica-scaled chrysophytes (Synurophyceae) from some rivers and shallow lakes in Hungary (1994)
    Springer
    Hydrobiologia 289 (1994), S. 157-162 
    Details
    ISSN: 1573-5117
    Keywords: Silica scales ; Synurophyceae ; Synura bloom ; seasonality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Silica-scaled chrysophytes are a special group in the phytoplankton of rivers and shallow lakes. They are present the whole year at low density, but sometimes — mainly during autumn and spring — some species can become frequent and very numerous to form real water blooms. In this study, seven species of silica-scaled chrysophytes have been recorded and identified by electron microscopy of phytoplankton samples from some rivers and shallow lakes in Hungary. Most of these silica-scaled chrysophytes have previously been found in eutrophic and hypertrophic localities, and almost all of them are common and widely distributed, even cosmopolitan. Only Synura echinulata Korshikov has not previously been recorded from Hungary. Some of them as Synura curtispina (Petersen & Hansen) Asmund, S. petersenii Korshikov, Mallomonas acaroides Perty emend. Ivanov, M. tonsurata Teiling were frequently found in the phytoplankton samples. Sometimes in autumn and winter Synura petersenii was the most abundant species in the phytoplankton and formed blooms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00007416
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  • 9
    Electronic Resource
    Electronic Resource
    Ecological observations on Skeletonema potamos (Weber) Hasle in the River Danube, near Budapest (1991–92, daily investigations) (1994)
    Springer
    Hydrobiologia 289 (1994), S. 163-170 
    Details
    ISSN: 1573-5117
    Keywords: Bacillariophyceae ; Centrales ; Skeletonema potamos ; ecology ; river phytoplankton
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The small, chain-forming centric diatom Skeletonema potamos (Weber) Hasle is one of the most important species of phytoplankton in the River Danube in Hungary. In low water periods from May to October, its abundance is high, contributing 10–20% of total biomass (its fresh weight is 3–6 mg l−1). The first data about its occurrence in Hungary, in the southern Danube stretch, were published by Schmidt & Vörös (1981). The presence of S. potamos was noted in Danube samples taken at the end of fifties near Budapest (Kiss, 1986). This species became abundant in the Hungarian stretch of River Danube at the end of sixties simultaneously with eutrophication. The main factors influencing the quantities of S. potamos populations are floods and temperature. The nutrient supply of the river is very high, therefore it cannot be a limiting factor. The effect of floods is a complex one. Increase in current velocity is not insignificant. Transparency influenced by the suspended matter content is important. In low water periods when suspended matter content is low (10–20 mg l−1), 70–90% of water column belongs to the euphotic zone. For this reason, low water periods favour increases in phytoplankton density. On the basis of this study, we conclude that S. potamos is a warm stenothermic species, with high light demand. Changes in length of pervalvar axis, diameter, S\V ratio and cell number in chains is influenced by temperature, duration of daylight and rate of cell division.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00007417
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  • 10
    Electronic Resource
    Electronic Resource
    Winter blooms of centric diatoms in the River Danube and in its side-arms near Budapest (Hungary) (1993)
    Springer
    Hydrobiologia 269-270 (1993), S. 317-325 
    Details
    ISSN: 1573-5117
    Keywords: Bacillariophyceae ; Centrales ; phytoplankton bloom ; winter bloom
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Although the phytoplankton in large eutrophic rivers is often abundant, data on winter populations are scarce. Phytoplankton has been sampled since 1979 in the main arm of the River Danube at Göd (20 km north from Budapest), and also from two side-arms, upstream and downstream of Budapest. Analysis of winter samples has shown high population densities of phytoplankton ‘blooms’ on several occasions. In general centric diatoms (20 taxa determined) were abundant and dominant during the blooms. The most abundant taxon in November was Stephanodiscus hantzschii f. tenuis, and in February S. minutulus. The most important factors in forming winter blooms of Centrales are rich nutrient supply, slow current speed and high transparency. Massive phytoplankton blooms occurred several times between November and March in the small side-arm at Göd. In the large side-arm downstream of Budapest (Soroksári-Dung) large blooms of centric diatoms were found in winter (often under ice, which was covered by snow in many cases). Here S. hantzschii f. tenuis and S. minutulus were the most abundant species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028030
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