ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    facet.materialart.
    Unknown
    Simulation of 2003 Bam (Iran) earthquake using empirical Green's function method via very small and near-fault events (2015)
    Oxford University Press
    Details
    Publication Date: 2015-04-04
    Description: The 2003 Bam, Iran, earthquake ( M w  = 6.6) was recorded by the BAM accelerometer station. Since the causative fault was located just below the city, the accelerometer recorded the main shock, a foreshock and several local aftershocks. To study the scenario of rupturing, we simulated all components of the observed main shock waveform via the empirical Green's function method. 28 selected aftershocks and the single foreshock are used to simulate the main shock in the frequency range of 0.5–5 Hz. Since the events were very close to the station, some small events may not have similar path effects to the main shock. Therefore, it is essential to employ some appropriate changes to the waveforms to alleviate path difference effects. The starting point of the rupture is identified in the centre of the strong motion generation area and is located approximately 5 km south of the BAM station and in depth of about 7 km. The horizontal simulated components imply that the main shock was located west of the BAM station. In contrast, significant variation in the ratio of amplitudes in EW and NS components may be used to discuss the possibility of dissimilarity in the focal mechanism of the small events. Most aftershocks with similar mechanisms to the main shock, that is similar EW/NS maximum amplitude ratio, have capacity to simulate certain peaks of their horizontal components. However, some small events with different mechanisms are only able to simulate the peaks of up to one horizontal component. Some changes were applied to the empirical Green's function method to incorporate two small events by using a combined fault model. While the two aftershocks have different mechanisms, some combinations may improve simulations. The rupture initiating point at the middle of the fault plane and improved simulations by combination of two fault surfaces with different focal mechanisms may suggest a bilateral rupture and combination of two focal mechanisms for the main shock of the Bam earthquake.
    Keywords: Seismology
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Enrichment of Artemia nauplii with essential fatty acids and vitamin C: effect on rainbow trout (Oncorhynchus mykiss) larvae performance (2018)
    Details
    Publication Date: 2021-05-19
    Description: The effect of essential fatty acids (EFA) and vitamin C-enriched Artemia nauplii on growth, survival, and resistance to temperature (high) stress in rainbow trout larvae reared in tanks were investigated. The larvae (average weight 120.43mg±13.5) were fed 6 times daily starting at the onset of exogenous feeding for 1 week. Triplicate groups of fish were offered one of four treatments (1) commercial starter food for rainbow trout، (2) newly hatched Artemia nauplii (unenriched) ،(3) highly unsaturated fatty acid (HUFA) + vitamin C-enriched Artemia nauplii and (4) combination of 10 % HUFA+ vitamin C enriched nauplii and commercial starter food. After 1 week, all groups of fish were switched to the commercial diet for an additional period of 3 weeks. Statistical analysis of growth after the first week and at the end of the experiment, showed that growth of larvae in various treatments was significantly different (P〈0.05). After 4 weeks, the larvae in treatment 3 with the average weight of 657.50 ± 57.93 mg had the highest body weight (P〈0.05). The highest percentage of survival (96%) was observed in treatment 3 (P〈0.05). Proximate compositions of trout larvae after one week feeding with experimental diets showed that the protein in the larvae of treatments 3 and 4 was significantly different compared to other treatments (P〈0.05). The best result of resistance to temperature (up to 24ºC) was observed in larvae reared on treatment 3 with 91.34 ± 1.52 percent (P〈0.05).
    Description: Published
    Keywords: Artemia nauplii ; Rainbow trout ; Essential fatty acid ; Vitamin C ; Oncorhynchus mykiss ; Stress resistance ; Temperature ; Growth ; Survival ; Feeding ; Larvae ; Performance
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.557-569
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Dietary toxicity of colloidal silver nanoparticles in rainbow trout (Oncorhynchus mykiss) (2017)
    Details
    Publication Date: 2021-05-19
    Description: To evaluate the dietary toxicity of colloidal silver nanoparticles (AgNPs) in rainbow trout, fish were fed with diets containing 0, 20 and 50 mg.kg-1 of AgNPs for 5 weeks and then were fed free nanoparticles diet for a week. During this period, fish growth, as well as silver accumulation and elimination in liver, kidney, gastrointestinal tract and muscle were studied. According to our results, high doses of AgNPs in the fish diet decreased appetite and fish growth. In addition, feeding fish with the diet containing AgNPs (especially at higher doses) increases the accumulation of silver in fish tissues (silver concentration in liver〉 kidney〉 gastrointestinal tract 〉 muscle). Although, a oneweek period considered for elimination of nanoparticles from fish tissues were not enough; however, caused some changes in the accumulation of silver in different organs of the fish. Observed effects due to fish feeding with diets containing silver nanoparticles, suggests that nanoparticle ingestion could affect the fish health. Therefore, preventing the entry of these new materials into the food chain of aquatic organisms seems to be necessary.
    Description: Published
    Keywords: Silver Nanoparticles ; Rainbow trout ; Oncorhynchus mykiss ; Dietary ; Toxicity ; Aquatic nanotoxicology ; Accumulation ; Elimination
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.23-31
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Dietary toxicity of colloidal silver nanoparticles in rainbow trout (Oncorhynchus mykiss) (2021)
    In:  http://aquaticcommons.org/id/eprint/21989 | 18721 | 2018-01-19 11:23:50 | 21989 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-06
    Description: To evaluate the dietary toxicity of colloidal silver nanoparticles (AgNPs) in rainbow trout, fish were fed with diets containing 0, 20 and 50 mg.kg-1 of AgNPs for 5 weeks and then were fed free nanoparticles diet for a week. During this period, fish growth, as well as silver accumulation and elimination in liver, kidney, gastrointestinal tract and muscle were studied. According to our results, high doses of AgNPs in the fish diet decreased appetite and fish growth. In addition, feeding fish with the diet containing AgNPs (especially at higher doses) increases the accumulation of silver in fish tissues (silver concentration in liver〉 kidney〉 gastrointestinal tract 〉 muscle). Although, a oneweek period considered for elimination of nanoparticles from fish tissues were not enough; however, caused some changes in the accumulation of silver in different organs of the fish. Observed effects due to fish feeding with diets containing silver nanoparticles, suggests that nanoparticle ingestion could affect the fish health. Therefore, preventing the entry of these new materials into the food chain of aquatic organisms seems to be necessary.
    Keywords: Aquaculture ; Biology ; Rainbow trout ; Dietary toxicity ; Aquatic nanotoxicology ; Silver nanoparticles ; Accumulation ; Elimination ; Oncorhynchus mykiss ; Fish ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 23-30
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    Comparison of perfish solution efficiency with malachite green and formalin on fungal contamination control of rainbow trout (Oncorhynchus mykiss) eggs in incubation stage (2020)
    Details
    Publication Date: 2021-05-19
    Description: This research was conducted in autumn and winter 2016 in Shahid Motahary Coldwater Fishes Genetic and Breeding Research Center. In this study, comparison of Perfish solution efficiency with malachite green and formalin on fungal contamination control of rainbow trout (Oncorhynchus mykiss) eggs in incubation stage was done. For this porpuse the California incubators (20 × 35 × 30 cm) with depth of 20 cm, the height of water on the egg, 10 cm and water flow rate 4 to 6 liters per minute were used. Then the number of 700 fertilized eggs transported to each incubator tray. In this study, 9 treatments (perfish 15, 37, 75, 150, 300 ppm; malachite 2ppm; formalin 1000ppm; positive control and negative control) were tested with 3 replications. The highest Percentage of Eyed eggs in treatment of green malachite, formalin and perfish 75 ppm were observed respectively with 69.38±1.94, 64.99±8.05 and 63.76±4.72. The highest of hatching rate were observed in treatment of perfish 75 ppm (95.8±.6). Treatments of formalin and perfish 15 were showed the lowest (3.33±1.15) and highest (5.33±2.08) of larva deformity respectively, without the Significant difference among the experimental treatments. Finally the results showed that the best and more effective dose of Perfish was 75ppm in 30 min. furthermore with involving all aspects Perfish solution is a suitable new compound for the prevention of fungal contamination during the incubation period of Rainbow trout eyed eggs.
    Description: Published
    Keywords: Oncorhynchus mykiss ; Fungal contamination ; Eggs ; Incubator ; Hatching
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.177-186
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...