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  • 1
    Electronic Resource
    Electronic Resource
    An outbreak of post-surgical wound infections due to Mycobacterium abscessus (1998)
    Springer
    Pediatric surgery international 13 (1998), S. 406-410 
    Details
    ISSN: 1437-9813
    Keywords: Key words Mycobacteria ; atypical ; Mycobacterium abscessus ; Mycobacterium chelonae ; Infection ; post-surgical ; Infection control ; Glutaraldehyde
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract An outbreak of post-operative wound infections due to Mycobacterium abscessus is described. During a 5-month period 45 post-surgical patients developed wound infection, manifested by wound breakdown, cellulitis, and discharge and progressing slowly to suppuration and sinus formation. The majority (43/45) had undergone out-patient operations, and 40 had had surgery in the inguinal region. The source of infection was identified as contaminated tap water. A study revealed serious deficiencies in the disinfection and sterilisation techniques employed in the operating theatre (OT), including major defects in the autoclaving machine. The outbreak was controlled after several specific measures were instituted. The patients responded well to treatment with conventional first-line anti-tuberculous drugs administered for 3–8 months. The report highlights the necessity of strict monitoring of disinfection and sterilisation techniques in surgical units and OTs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003830050350
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  • 2
    Electronic Resource
    Electronic Resource
    Polymetamorphism of ores in Precambrian stratiform massive sulfide deposits at Ambaji-Deri, Western India (1979)
    Springer
    Mineralium deposita 14 (1979), S. 21-31 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Massive stratiform zinc-lead-copper sulfide ores, in association with cordierite-anthophyllite rocks, occur in adjacent localities of Ambaji and Deri, in Western India. The metasedimentary country rocks, interlayered with amphibolites and intruded by acidic to intermediate plutonic rocks, belong to the Precambrian Delhi Supergroup. The ore minerals identified by detailed mineragraphic studies include: sphalerite, galena, chalcopyrite, pyrite, pyrrhotite (both monclinic and hexagonal phases), magnetite, ilmenite, rutile, arsenopyrite, molybdenite, cubanite, mackinawite, boulangerite, gudmundite, meneghinite, lautite, tenantite, native bismuth, native silver, chalcocite and covellite. The common sulfide-silicate schistosity in the ores, flowage of sulfide streaks and tails around rotated poikiloblasts and in their pressure shadow region developed during early folding (F1) and regional metamorphism of the rocks under green schist facies condition. These were superimposed by a pervasive hornfelsic fabric involving sulfides and silicates and including microfabrics due to annealing and grain growth in sulfides, during a subsequent phase of low pressure thermal metamorphism and related tectonism (F2). Finally certain deformation features and some uncommon fabrics like martensitic lamellae in galena and subgrains in sphalerite developed during a mild deformation episode (F3) in the waning stages of tectonism in the area. Compositional change in the ores during thermal metamorphism was minimal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00201865
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  • 3
    Electronic Resource
    Electronic Resource
    Reply on the comments of M. K. Pandya and S. L. Solanki (1980)
    Springer
    Mineralium deposita 15 (1980), S. 401-405 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00202806
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  • 4
    Electronic Resource
    Electronic Resource
    Precambrian stromatolite and other structures in the Rajpura-Dariba polymetallic ore deposit, Rajasthan, India (1978)
    Springer
    Mineralium deposita 13 (1978), S. 1-9 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Intimate association of ∼ 2 billion years old stromatolite with pyritic lead-zinc ores in the Precambrian polymetallic deposit at Rajpura-Dariba in Rajasthan, which hitherto remained unreported, provides an additional documentation of the syn(-dia)-genetic mineralization. The growth form and petrography of the stromatolite structure have been described and an explanation sought regarding the concentration of sulfides along the siliceous and carbonaceous laminations, as well as in the intercolumnar regions. Consideration of the geologic features noted in the mineralized zone and surrounding region suggests that the stratiform ores were deposited in a near-shore shallow marine environment, developed on basement highs and associated with euxinic conditions. Later, the ores were metamorphosed under conditions reaching upto amphibolite facies during a three-stage deformational history of their enclosing rocks. Some salient features of the secondary structures in the ores have been discussed in relation to this deformation history.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00202904
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  • 5
    Electronic Resource
    Electronic Resource
    Sulfur and carbon isotope compositions in the stratiform Zn-Pb-Cu sulfide deposits of the Rajpura-Dariba belt, Rajasthan, NW India: A model of ore genesis (1986)
    Springer
    Mineralium deposita 21 (1986), S. 313-321 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The sulfur isotope composition of 86 sulfide minerals from the Middle Proterozoic, metamorphosed, stratiform, sediment-hosted Zn-Pb-CU sulfide deposits of Dariba and Sindeswar Kalan located within the Rajpura-Dariba belt in Rajasthan, NW India, have been determined. In addition, 16 carbonaceous and 2 carbonate rock samples from the ore zone have been analyzed for their Ctot and Corg contents and carbon isotope compositions. The sulfur isotope compositions range from 9.1‰ to −6.7‰ (mean value of 1.9‰). Increasing δ34S values stratigraphically upward are observed, particularly for pyrite and pyrrhotite suggesting a syngenetic origin for the sulfur. No marked lateral isotopic variations or isotopic variation in minerals from successive laminae in banded ore samples occur. Fractionation of sulfur isotopes between coexisting sulfides suggests that the original isotopic pattern was basically preserved during the amphibolite-facies metamorphism suffered by the deposits. Corg in carbonaceous rocks ranges 0.5–9.3 wt%, with δ13C values between −21‰ and −31‰ (mean of −25.4‰) in keeping with the biogenic derivation of the carbon. Recrystallized dolostones have δ13C values close to −14.4‰ Geological evidence and isotopic features are consistant with the following genetic scheme: (a) base-metal ores along the belt formed from geothermal emanations carrying H2S, produced by the chemical reduction of seawater sulfates and leaching of mafic volcanics, in a semiclosed (with respect to SO4), shallow-water, rift-related basin with high biological activity; (b) pyrite and pyrrhotite formed diagenetically by bacterial reduction of sulfate in pore seawater in a system open to H2S, thus bringing about the gradual enrichment of 34S in these minerals stratigraphically upward; and (c) northward in the belt, at Sindeswar Kalan, the basin of ore deposition was relatively more open.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204350
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  • 6
    Electronic Resource
    Electronic Resource
    Tourmaline in Proterozoic Massive Sulfide Deposits from Rajasthan, India (1997)
    Springer
    Mineralium deposita 32 (1997), S. 94-99 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract We have analyzed the chemical composition and boron isotope composition of tourmaline from tourmalinites, granite and a quartz-tourmaline vein from the Deri ore zone and from a pegmatitic band in the Rampura-Agucha ore body. These two Proterozoic massive sulfide deposits occur in the Aravalli-Delhi orogenic belt, Rajasthan, northwest India. Tourmaline from stratiform tourmalinites closely associated with the massive sulfides in the Deri deposit have preserved their original chemical compositions despite regional and thermal metamorphism in the area. These tourmalines have low Fe/(Fe + Mg) ratios (0.19–0.30; mean 0.26) that suggest formation close to the sediment-sea water interface. The δ11B values (−15.5 and −16.4‰) are compatible with boron derived from leaching of argillaceous sediments and/or felsic volcanics underlying the original massive sulfide deposit during its formation. Boron isotope compositions measured in tourmaline from a post-ore granite and quartz-tourmaline vein in the Deri deposit indicate that boron in these tourmalines was derived from the tourmalinites produced during ore formation. The boron isotope systematics of a coarse brown tourmaline crystal from a pegmatitic band on the hanging wall contact of the Rampura-Agucha deposit indicate that 45 ± 25% of the boron within the original tourmaline was lost during upper amphibolite facies regional metamorphism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001260050075
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  • 7
    Electronic Resource
    Electronic Resource
    Spectrophotometric determination of thorium in standard samples and monazite sands based on the floated complex of thorium with N-hydroxy-N,N′-diphenylbenzamidine and thorin (1996)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 355 (1996), S. 34-36 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A selective and sensitive spectrophotometric method for the determination of Th(IV) has been based on the reaction with thorin and subsequent extraction of the red-orange coloured complex with N-hydroxy-N,N′-diphenylbenzamidine (HDPBA) in benzene as floated complex at pH 2.2. The complex in ethanol exhibits a maximum absorbance at 495 nm, with a molar absorptivity of 6.0×104 l mol-1 cm-1, with a Sandell’s sensitivity of 3.9×10-3 μg cm-2. The method follows Beer’s law up to 3.0 μg Th(IV) ml-1. None of the common cations and anions tested interfere. The detection limit of the method is 0.04 μg Th(IV) ml-1, the RSD (n=10) is 1.4%. The method has been successfully employed for the determination of thorium in various standard and monazite samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0021663550034
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