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  • 1
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 255 (1977), S. 1040-1040 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Materials and structures 23 (1990), S. 252-255 
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Description / Table of Contents: Résumé La boue rouge est un déchet de l’extraction d’aluminium: il s’agit principalement d’oxydes d’aluminium, de fer et de titanium. La production actuelle de boue rouge dépasse en Inde 2 millions de tonnes chaque année qui ne sont employées à aucun usage valable excepté, en quantité limitée, comme filler dans la préparation des routes. On a tenté au Central Building Research Institute de produire des briques d’argile cuites en remplaçant partiellement l’argile par de la boue et des cendres volantes. Cette fabrication de boue rouge est appelée rapidement à une utilisation importante. On a également essayé d’incorporer dans la boue rouge un faible pourcentage de chaux et de compresser le mélange sous forme de briques à une teneur en humidité optimale dans le but d’examiner leur résistance et leur stabilité à l’action érosive de l’eau. On a obtenu à 28 jours de moulage et de conservation en atmosphère humide (mois d’août) une résistance à la compression en humidité maximale de 3,75 MN m−2 avec 5% de chaux et de 4,22MN m−2 avec 8% de chaux. Les échantillons de boue rouge examinés provenaient de la Société Indienne d’Aluminium (Indalco). On a soumis les échantillons de brique à un vieillissement accéléré, et on a trouvé qu’ils convenaient comme éléments de maçonnerie pour habitations à faible coût. En même temps, on a examiné les modifications qui interviennent dans le mélange de boue rouge, en particulier du point de vue de la distribution dimensionnelle des pores, quand on le remplace partiellement par de la terre grossière et des cendres volantes. Les résultats montrent que l’action bénéfique de la chaux sur la boue rouge est surtout d’ordre chimique.
    Notes: Abstract Red mud is a waste material obtained from the aluminium extraction industry and consists mainly of the oxides of aluminium, iron and titianium. The present red mud production in the country is above two million tons every year, which is not being put to any worthwhile use except as a filler to a small extent in the preparation of roads. Efforts have been made at CBRI to produce burnt clay bricks by partially replacing the clay with red mud and fly-ash. In this process, the red mud is expected to find a major use shortly. Efforts have also been made to incorporate in the red mud a small percentage of lime and compress the mix at optimum moisture content in the form of bricks with a purpose of examining their strength and stability to the erosive action of water. A maximum wet compressive strength of 3.75 MN m−2 with 5% lime and 4.22 MN m−2 with 8% lime has been obtained after 28 days of casting and humid curing in the month of August. The red mud sample studied was obtained from the Indian Aluminium Company. The brick samples were studied for accelerated weathering and found suitable for use as a walling material for low-cost shelters. Modifications in the red mud mix, especially from the viewpoint of particle size distribution, have also been examined simultaneously by its part replacement with coarse-grained soil and fly-ash. The results indicate that the basis of the beneficial action of lime on red mud is predominantly chemical.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Inhibitors of, and radioactive substrates for, protein synthesis were introduced into germinating pea (Pisum sativum L.) seeds, and protein synthesis was allowed to proceed in vivo. Subsequent analyses of subcellular fractions showed the following: Cycloheximide strongly inhibited the incorporation of [14C]leucine into both mitochondrial and cytoplasmic proteins. d-Threo-chloramphenicol and erythromycin did not affect cytoplasmic protein synthesis, but partially inhibited mitochondrial protein synthesis. These results suggest that most of the new mitochondrial proteins were originally synthesized in the cytoplasm. Actinomycin D did not appreciably affect the initial incorporation of [14C]leucine into either mitochondrial or cytoplasmic proteins, suggesting that information (mRNA) concerning the initially synthesized proteins may be present in the quiescent seeds. The lack of appreciable incorporation of [3H]thymidine into mitochondrial DNA supported our previons report that mitochondria may not be synthesized de novo in pea cotyledons.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 56 (2000), S. 755-761 
    ISSN: 1432-1041
    Keywords: Unstable angina Drug utilisation Developing countries
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract. Objective: The current study was designed to investigate drug utilisation in the management of unstable angina in India and to calculate the costs incurred by patients in the treatment of a single episode of unstable angina. Methods: We conducted a prescription survey to examine the use of antianginal drugs in patients with unstable angina in a tertiary care Indian hospital. The use of concurrent medications such as antidiabetic, antihypertensive and lipid-lowering agents was also examined. Data on the cost of treatment, investigations, income, and family size were collected from the case histories or direct interviews with the patients/relatives. Results: A total of 336 consecutive prescriptions were evaluated. Aspirin was the most frequently prescribed drug (98%) followed by nitroglycerin infusion (90%) and enoxaparin (52%). One of the heparins was used by 89% of all patients and β-blockers by up to 62% of the patients. Besides antianginals, antihypertensive (49%) and antidiabetic (16%) drugs were commonly coadministered. The mean (±SD) cost of treatment of a single episode of unstable angina in the hospital was US $494 (±271) against an annual per capita income of US $245. The mean (±SD) cost incurred by the patients due to drugs alone during the hospital stay was US $70 (±18) and enoxaparin accounted for 60% of the expenditure due to drugs. Conclusions: The results of our study show that low-molecular-weight heparin, enoxaparin, is replacing unfractionated heparin in the treatment of unstable angina. In view of the use of costly new drugs, there is an urgent need for carrying out pharmacoeconomic analysis in developing countries as the treatment of a single episode of unstable angina imparts a considerable economic burden on the patient.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 27 (1992), S. 853-862 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Porosity occurs in cast solidifying metals and alloys due to negative pressures generated during solidification contraction, and pressure developed by gases dissolved in the motten metal. Both the above processes may act either together or separately to produce such shrinkage or gas defects (collectively termed pores). They are generally unwanted and constitute a major industrial problem. This paper is an attempt to review up-to-date knowledge of the conditions of pore formation in cast metals and alloys. Various mechanisms responsible for pore nucleation and growth are summarized, and experimentally evaluated using an unfed type of mould with aluminium alloy castings. The observations are in support of a non-nucleation mechanism of pore formation playing a major role in the occurrence of such defects in cast metals. Further, in gas-containing alloy melts the critical amounts of gas required for single and multiple pore nucleation have been determined quantitatively and are listed in the text. The gas contents of the melts were measured using an apparatus based on the “first bubble technique”. It is also experimentally observed that under poor feeding conditions more than one of the non-classical nucleation mechanisms may be functional at the same time for the formation of such defects.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 14 (1995), S. 1484-1485 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Bioscience reports 5 (1985), S. 551-558 
    ISSN: 1573-4935
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Ca2+ ATPase molecules in sarcoplasmic reticulum, isolated from rabbit skeletal muscl% have been induced to crystallize into two-dimensional arrays by incubating the vesicles with phospholipase A2 and dialysing against dilute Tris/HCl buffer. These crystals differ in shape and size from those produced by treatment of the sarcoplasmic reticulum vesicles with Na3VO4. However, the unit-cell dimensions of both types of crystals are similar. The differences in shape and size are presumably due to differences in the mechanisms of crystal formation induced by treatment with phospholipase and Na3VO4.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Bioscience reports 6 (1986), S. 1065-1070 
    ISSN: 1573-4935
    Keywords: Ca2+-ATPase crystals ; phospholipase-induced crystals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A two-dimensional projection map was computed of the Ca2+-ATPase molecules in sarcoplasmic reticulum, isolated from rabbit skeletal muscle. Crystalline arrays of Ca2+-ATPase molecules were formed by incubating the membrane vesicles with phospholipase A2 and dialysing against Tris/HCl buffer. Ca2+-ATPase molecules appear as quasi-triangular blobs in the projection map and seem to form dimers. The projection map seems to indicate an enzyme conformation somewhat similar to vanadate-induced crystals but different from lanthanide-induced crystals of Ca2*-ATPase.
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  • 10
    ISSN: 1573-4935
    Keywords: immunocytochemistry ; J1-31 monoclonal antibody ; astrocytes ; Müller cells ; ependyma ; Sprague-Dawley rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Monoclonal antibody (MAb) J1-31 raised using human brain homogenate as immunogen in mice can be used as a cell type marker for certain types of CNS macroglia, namely astrocytes, Müller cells and tanycytes as well as ciliated ependymal cells. Except for the ciliated ependymal cells, these types of macroglia express glial fibrillary acidic protein (GFAP). J1-31 antigen is an intracellular protein which has a MW of 30 kD under reducing conditions for gel electrophoresis (Singhet al., 1986). This protein is distinct from GFAP (MW 50 kD) and vimentin (MW 55 kD), the two core proteins of 10 nm IFs known to be expressed in the above types ofmacroglia. This conclusion is based on several criteria including temporal differences in the onset of expression of GFAP and J1-31 antigen during development of the rat cerebellum. Also, there is no detectable (by immunofluorescence microscopy) expression of J1-31 antigen in the prenatal CNS or outside the CNS where vimentin has been reported to be abundant. The most direct evidence that J 1-31 antigen and GFAP are distinct proteins comes from studies on the mature ciliated ependymal cells which do not express GFAP and yet show intense immunostaining for J1-31 antigen.
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