Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Palmoplantar keratoderma of Unna-Thost: response to biotin in one family (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental dermatology 17 (1992), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Three members of a family with Unna-Thost palmo-plantar keratoderma who showed skin improvement whilst receiving oral biotin are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2230.1992.tb00224.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Intrinsic aging vs. photoaging: a comparative histopathological, immunohistochemical, and ultrastructural study of skin (2002)
    Oxford, UK : Munksgaard International Publishers
    Experimental dermatology 11 (2002), S. 0 
    Details
    ISSN: 1600-0625
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Cutaneous aging is a complex biological phenomenon affecting the different constituents of the skin. To compare the effects of intrinsic and extrinsic aging processes, a total of 83 biopsies were collected from sun-exposed and protected skin of healthy volunteers representing decades from the 1st to the 9th (6–84 years of age). Routine histopathology coupled with computer-assisted image analysis was used to assess epidermal changes. Immunoperoxidase techniques with antibodies against type I and type III collagens and elastin were used to quantitatively evaluate changes in collagen and elastic fibers and their ultrastructure was examined by transmission electron microscopy. Epidermal thickness was found to be constant in different decades in both sun-exposed and protected skin; however, it was significantly greater in sun-exposed skin (P = 0.0001). In protected skin, type I and III collagen staining was altered only after the 8th decade, while in sun-exposed skin the relative staining intensity significantly decreased from 82.5% and 80.4% in the 1st decade to 53.2% and 44.1% in the 9th decade, respectively (P = 0.0004 and 0.0008). In facial skin the collagen fiber architecture appeared disorganized after the 4th decade. The staining intensity of elastin in protected skin significantly decreased from 49.2% in the 1st decade to 30.4% in the 9th decade (P = 0.05), whereas in sun-exposed skin the intensity gradually increased from 56.5% in the 1st decade to 75.2% in the 9th decade (P = 0.001). The accumulated elastin in facial skin was morphologically abnormal and appeared to occupy the areas of lost collagen. Collectively, the aging processes, whether intrinsic or extrinsic, have both quantitative and qualitative effects on collagen and elastic fibers in the skin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-0625.2002.110502.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Genetics of fruit body production in higher basidiomycetes II. Monokaryotic and dikaryotic fruiting in schizophyllum commune (1979)
    Springer
    Current genetics 1 (1979), S. 85-88 
    Details
    ISSN: 1432-0983
    Keywords: Fruiting in Schizophyllum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In the wood destroying fungus Schizophyllum commune, a well known subject for genetic studies, fruit bodies are produced not only in the course of the sexual cycle but also asexually. Sexual fruiting requires the establishment of a dikaryon which is under the control of the incompatibility factors A and B. Asexual fruiting, however, starts directly from a monokaryon. The initiation of monokaryotic fruiting requires the presence of a single gene leading to the differentiation of fruit body initials. The action of at least two more genes is required for the further morphogenetic steps resulting eventually in the production of fruit bodies which differ in shape from dikaryotic fruit bodies. As a consequence of a mitosis their basidia produce two spores only. The three genes responsible for monokaryotic fruiting are pleiotropic and determine synergistically the timing of dikaryotic fruiting within a range between 6 to 20 d or longer. A fourth gene was found which codes epistatically for the formation of dome-like masses of stromatic tissue, thus directing morphogenesis into a side track.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00413309
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Two morphological markers indicating dikaryosis in Schizophyllum commune (1982)
    Springer
    Theoretical and applied genetics 63 (1982), S. 279-281 
    Details
    ISSN: 1432-2242
    Keywords: Dikaryon formation ; Schizophyllum ; Fruit bodies ; Incompatibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In the wood destroying basidiomycete Schizophyllum commune a method is described to recognize the onset of dikaryosis rapidly in using recessive genetic markers. The gene ai +/ai causes in its mutant recessive allele (ai) the production of dark coloured fruit bodies. This can be made use of to evaluate macroscopically the formation of a dikaryon. Another useful marker is the gene rd +/rd. The recessive allele (rd) causes phenotypically the formation of a round looking mycelium instead of the fringed looking mycelium, the wild type. This genetic marker which is closely linked to the A-incompatibility factor is therefore also qualified to detect the onset of dikaryosis without much effort.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304009
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Influence of cellulose type on the properties of extruded pellets. Part I. Physicochemical characterisation of the cellulose types after homogenisation (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 597-607 
    Details
    ISSN: 1435-1536
    Keywords: Key words Powdered cellulose ; Microcrystalline cellulose ; Physicochemical properties ; Homogenisation process
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  The physicochemical properties of different types of powdered cellulose (PC) and microcrystalline cellulose (MCC) were studied by examining the changes in particle size, viscosity and specific surface area after a homogenisation process. An additional characterisation was carried out using X-ray diffractometry. A preliminary investigation using a type of MCC showed that increasing the homogenisation pressure and the number of passage cycles led to a significant decrease in the particle size and simultaneously to a remarkable increase in the specific surface area and viscosity. Most MCC types showed the same pattern during the homogenisation process. “Colloidal” MCC displayed a higher viscosity than the others but without significant change in the viscosity after different homogenisation cycles. In contrast to this behaviour of the MCCs, the PCs showed no remarkable change in the particle size but did show a marked change in their viscosity. Furthermore, only MCC suspensions, with the exception of “colloidal” MCC, agglomerated after the homogenisation process, whereas this was not seen in the PC suspensions. Hence, since the MCC types as well as the PC types originally had the same chemical structure, this different behaviour among these types can only be attributed to their different physical properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960000292
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Recovery of Uranium, Thorium and Cerium from Egyptian monazite sands. I (1970)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 375 (1970), S. 308-314 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es wird ein Verfahren zur Abtrennung von Uran, Thorium und Cer aus ägyptischem Monazitsand beschrieben, das auf einem Aufschluß mit 50proz. Natronlauge und der Fällung der Metalle als Oxidhydrate beruht.
    Notes: A process is described for the recovery of uranium, thorium and cerium from Egyptian monazite sands. The process consisted of: 1. Treatment of fine ground monazite sands with hot 50% caustic soda solution with a caustic soda to monazite sand ratio of 1:1. 2. Dilution of the reaction slurry with 6 times the weight of the sand with water to dissolve the sodium phosphate formed. 3. Filtration of the reaction slurry to remove the solid hydrous metal oxides from the sodium phosphate and excess sodium hydroxide. 4. Drying of the mixed hyrous oxides at 150°C for 10 hours to oxidise cerium. 5. Dissolution of the trivalent rare earths by addition of dilute nitric acid dropwise to an aqueous suspension of the dried hydrous oxides to pH 1.3.6. Separation of uranium, thorium and cerium by filtration of the dissolved tervalent rare earths from undissolved residue of the mixed hydrous oxides.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19703750314
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Separation of Samarium and Europium from Egyptian Monazite Sands by Sodium Amalgam. Part I (1972)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 392 (1972), S. 69-80 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Trennung von Samarium und Europium aus ägyptischem Monazitsand mittels Natriumamalgam. Teil IDie Abtrennung von Sm und Eu von anderen Seltenerden mit Hilfe von Na-Amalgam nach saurem Monazit-Aufschluß gelingt bei pH = 3,5 und Kühlung auf nahe 0°C mit einem Anreicherungsverhältnis Sm: Eu: La = 14:9:1. Zusatz von NaCl vermindert die Verunreinigung des abgetrennten Sm durch La. Die optimale totale Seltenerdkonzentration in der Einsatzlösung liegt bei 35 g/l, gepuffert wird durch ≤ 64 ml Eisessigzusatz/l.Bei alkalisch aufbereiteten Seltenerdlösungen erwies sich eine Natriumamalgam-Dispersion in Dodecylamin als vorteilhaft.
    Notes: Factors affecting the separation of both Sm and Eu from other rare earths, after acid processing of monazite, by sodium amalgam are: Increasing extraction in the order Sm 〉 Eu 〉 La at all pH values, preferably at pH 3.5 with an enrichment ratio of 14:9:1; 0.26% sodium amalgam giving optimal results, preferably on cooling nearer to zero temperature. The pollution by La of separated Sm or Eu could be masked by sodium chloride addition in up to 0.2 N. Buffering by acetate was proved to be indispensable and preferentially in no less than 64 ml glacial acetic acid/l feed. Concerning the total lanthanons concentration, a 35 gm/l feed is recommended. When working on alkali by-produced rare earths liquors, good enhancement in both recoveries and purity was achieved by use of dodecylamine dispersed sodium amalgam.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19723920110
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Separation and Purification of Cerium from Egyptian Monazite Sands (1966)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 347 (1966), S. 205-214 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es wird eine Methode zur Rückgewinnung von Cer aus Ce(III)-nitrat-Rohlösungen beschrieben, bei der Na—Ce(III)-sulfat ausgefällt, mit 18% wäßriger Natronlauge zersetzt, und nach Trocknen bei 110°C Ceroxidhydrat erhalten wird.Es wurde ferner die Reinigung von Ce-Verbindungen durch Extraktion aus wäßriger Phase und der Einfluß verschiedener Parameter auf den Ce(VI)-Verteilungskoeffizient für Salpetersäure-Tributylphosphat/Kerosin untersucht. Ein Extraktionsverfahren zur Darstellung von spektroskopisch reinem CeO2 wird angegeben.
    Notes: A process is described for the recovery of cerium from crude cerium(III) nitrate solution as sodium cerium sulphate. The double sulphate is then treated with 18% NaOH solution and dried at 110°C to hydrated ceric oxide.The purification of crude cerium by solvent extraction was studied and data are presented on the effect of several variables on the distribution coefficient of Ce(IV) between nitric acid and tributyl phosphate-kerosene. After extraction and scrubbing the cerium compounds obtained were found to be of spectroscopic purity grade.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19663470314
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Effect of diluents on the extraction of thorium nitrate with tributyl phosphate (1969)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 371 (1969), S. 106-112 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es wurde die Extraktion von Thorium aus salpetersaurem wäßrigem Medium durch Tributylphosphat TBP in Abhängigkeit von verschiedenen organischen Verdünnungs-mitteln untersucht. Bei Konzentrationen 〈 150 g ThO2/1 und 5 m HNO3 wurde eine starke Abhängigkeit beobachtet, wobei mit hadelsüblichen Kerosin verdünntes TBP die beste Extraktionswirkung zeigte.
    Notes: Investigations on the extraction of thorium nitrate with TBP diluted with various diluents were made. At lower concentrations of thorium (〈 150g ThO2/1) and lower concentrations of nitric acid (〈 57 - HNO3) in the aqueous solution, extraction depends very much on the nature of diluents used. The greatest extraction ability is shown by TBP diluted with commercial keresene than with toiuene, rising sun kerosene, benzene, n-hexane, xylene, carbon tetrachloride, diethyl ether and di-isopropyl ether. At higher concentrations of thorium (〉 150 gThO2/1) and /or higher nitric acid concentrations (〉10 M-HNO3/1) as well as very low nitric acid concentrations (〈1 M-HNO3/1) differences in the distribution coefficient of thorium decrease and almost disappear. Also, at very low and very high concentrations of TBP the dependence of distribution coefficient of thorium on the nature of the diluents is very small.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19693710113
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...