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  • Jüdische Studien  (7)
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  • Jüdische Studien  (7)
  • 1
    Online-Ressource
    Online-Ressource
    Effect of Acute Ammonia Stress on Antioxidant Enzymes and Digestive Enzymes in Barramundi Lates calcarifer Larvae
    SAABRON PRESS ; 2018
    In:  Israeli Journal of Aquaculture - Bamidgeh Vol. 70 ( 2018-1-1)
    Details
    In: Israeli Journal of Aquaculture - Bamidgeh, SAABRON PRESS, Vol. 70 ( 2018-1-1)
    Kurzfassung: The acute toxicity of ammonia to barramundi Lates calcarifer larvae (15 days post-hatching, DPH) was studied with a semi-static bioassay method to understand the physical response of fish larvae to ammonia stress. In this study, 15 and 20 mg/L ammonia were tested, and 0 mg/L ammonia (control) was used as control. The activity of antioxidant enzymes including superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), acid phosphatase (ACP), glutathione peroxidase (GSH-Px), and digestive enzymes lipase (LPS), amylase (AMS), trypsin (TRYP) were used as biochemical indicators. With the increase of residue time, the SOD activity in barramundi was elevated at 15 mg/L ammonia and decreased at 20 mg/L ammonia. CAT activity was lower at 20 mg/L ammonia. GSH- PX activity was elevated at the low ammonia concentration and decreased at the high ammonia concentration. ACP activity was elevated after exposure to ammonia. LPS and AMS activities in the control were significantly higher than those of the other groups (P 〈 0.05). TRYP activity was elevated after exposure to ammonia. The results indicate that acute ammonia stress significantly affects antioxidant capacity and digestive capacity, and barramundi exhibited a certain tolerance of ammonia in a short time ( 〈 6h). Results from the present study will improve our understanding of the physical response of fish to ammonia and may guide hatchery practice for Lates calcarifer.
    Materialart: Online-Ressource
    ISSN: 0792-156X , 0792-156X
    URL: Article
    DOI: 10.46989/001c.20930
    Sprache: Englisch
    Verlag: SAABRON PRESS
    Publikationsdatum: 2018
    ZDB Id: 291787-7
    ZDB Id: 2542938-3
    SSG: 21,3
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 2
    Online-Ressource
    Online-Ressource
    Experimental and Modeling Study of the High‐Temperature Ignition of Methane and Methane Mixtures with Ethane and Propane
    Wiley ; 1996
    In:  Israel Journal of Chemistry Vol. 36, No. 3 ( 1996-01), p. 305-312
    Details
    In: Israel Journal of Chemistry, Wiley, Vol. 36, No. 3 ( 1996-01), p. 305-312
    Kurzfassung: An important part of deepening our understanding of the reaction mechanism of natural gas oxidation is validating a detailed model against experimental flame and ignition data. Ignition delays in shock‐heated CH 4 –O 2 mixtures, with and without ignition‐promoting additives, account for most of the available validation data. Most, but not all, ignition delays in such mixtures reported in the literature have been found to agree with calculations done using the GRI‐Mech 1.2 model. Additional reflected shock wave ignition experiments were done to explore possible reasons for the mismatches and to study the promotion of CH 4 ignition by small amounts of C 2 H 6 and C 3 H 8 additives. Empirical correlations were derived that describe ignition delays in CH 4 –O 2 –C 2 H 6 (C 3 H 8 ).
    Materialart: Online-Ressource
    ISSN: 0021-2148 , 1869-5868
    URL: Issue
    URL: Article
    DOI: 10.1002/ijch.v36.3
    DOI: 10.1002/ijch.199600042
    Sprache: Englisch
    Verlag: Wiley
    Publikationsdatum: 1996
    ZDB Id: 2066481-3
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 3
    Online-Ressource
    Online-Ressource
    Effect of Algae Decaying on Shrimp Culture System and Suggested Biological Remediation Strategies
    SAABRON PRESS ; 2020
    In:  Israeli Journal of Aquaculture - Bamidgeh Vol. 72 ( 2020-4-29)
    Details
    In: Israeli Journal of Aquaculture - Bamidgeh, SAABRON PRESS, Vol. 72 ( 2020-4-29)
    Kurzfassung: Pond water with algae blooms was collected, and maintained in the dark over a 2-day period without nutritional supplements. The physico-chemical parameters and the density of algae were measured. The concentration of NH 4+-N, DIN and PO4–P in water in darkness significantly increased, and the density of algae decreased significantly. Isolated water was exposed to three bio-remediation water treatments: addition of green algae, Bacillus subtilis and photosynthetic bacteria. After remediation, the concentrations of NH4+ -N, NO3- -N, DIN and PO4- -P in the three treatment groups were significantly lower than the control group. No difference was observed in the concentration of NO2–N between the control group and the photosynthetic bacteria group. Results from all treatments showed water quality deterioration along with increase in nitrogen and phosphorus concentrations. Bio-remediation methods can be effectively adapted in shrimp culture after algae decay, and one of the most promising biological remediation strategies is the use of green algae.
    Materialart: Online-Ressource
    ISSN: 0792-156X , 0792-156X
    URL: Article
    DOI: 10.46989/001c.18974
    Sprache: Englisch
    Verlag: SAABRON PRESS
    Publikationsdatum: 2020
    ZDB Id: 291787-7
    ZDB Id: 2542938-3
    SSG: 21,3
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 4
    Online-Ressource
    Online-Ressource
    Molecular Cloning and Response to Water Temperature and Nutrient Manipulation of Insulin-like Growth Factor (IGF) Genes in Golden Pompano Trachinotus ovatus (Linnaeus 1758) Larvae
    SAABRON PRESS ; 2016
    In:  Israeli Journal of Aquaculture - Bamidgeh Vol. 68 ( 2016-1-1)
    Details
    In: Israeli Journal of Aquaculture - Bamidgeh, SAABRON PRESS, Vol. 68 ( 2016-1-1)
    Kurzfassung: In this study, insulin-like growth factor I (IGF I) and IGF II in golden pompano larvae were cloned and analyzed. In the first trial, IGF expression during ontogeny of larvae in the first 18-days of their life was explored, and then the response of IGFs to water temperature (23, 26, and 29oC) on 12 day post hatching (DPH) and 18 DPH were compared. On 28 DPH, the response of IGFs to the manipulation of nutrients was evaluated. The expression of IGF I increased with the increase of fish age, and was not significantly affected by water temperature. The expression of IGF II was affected by water temperature on 12 DPH and 18 DPH. The expression of IGF II at 23oC was significantly higher than at 26oC and 29oC. The expression of IGFs in fish larvae on 28 DPH was not concomitant with nutrient manipulation. This study detected the gene expression of IGFs at the early stage of golden pompano larvae. The time dependent expression of IGF genes in fish larvae is important to understand the ontogenetic development and growth of fish larvae in early life.
    Materialart: Online-Ressource
    ISSN: 0792-156X , 0792-156X
    URL: Article
    DOI: 10.46989/001c.20790
    Sprache: Englisch
    Verlag: SAABRON PRESS
    Publikationsdatum: 2016
    ZDB Id: 291787-7
    ZDB Id: 2542938-3
    SSG: 21,3
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 5
    Online-Ressource
    Online-Ressource
    Effects of Dietary Supplementation with Fermented Ginkgo Leaves on Innate Immunity, Antioxidant Capability, Lipid Metabolism, and Disease Resistance Against Aeromonas hydrophila Infection in Blunt Snout Bream (Megalobrama amblycephala)
    SAABRON PRESS ; 2015
    In:  Israeli Journal of Aquaculture - Bamidgeh Vol. 67 ( 2015-1-1)
    Details
    In: Israeli Journal of Aquaculture - Bamidgeh, SAABRON PRESS, Vol. 67 ( 2015-1-1)
    Kurzfassung: This study was conducted to investigate the effect of Candida utilis and Aspergillus niger, combined with fermented Ginkgo biloba leaves (FGB) on immunity, antioxidant capability, lipid metabolism, and disease resistance against Aeromonas hydrophila infection in juvenile blunt snout bream (Megalobrama amblycephala). Fish were fed basal diets supplemented with fermented Ginkgo biloba leaves FGB1(0.125%), FGB2(0.25%), FGB3(0.5%), FGB4(1.0%), or Control (0.00%) respectively. At the end of the 60-day feeding trial, fish were challenged by A. hydrophila and mortality rate was recorded for the next 7 days. Results showed that, compared with the control, serum myeloperoxidase (MPO) activity of groups FGB1 and FGB2, alkaline phosphatase (AKP) and lysozyme (LZM) activity of group FGB2 increased significantly (P 〈 0.05), while malondialdehyde (MDA) and low density lipoprotein cholesterol (LDL-C) contents of group FGB2, immunoglobulin M (IgM) activity of group FGB4 decreased significantly (P 〈 0.05). Furthermore, Acid phosphatase (ACP), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH) and triglyceride (TG) activities were not affected (P 〉 0.05). After A. hydrophila challenge, the relative mortality of group FGB1 and FGB2 were significantly lower than the control (P 〈 0.05), however the highest rate was in group FGB4. Results of this study indicate that dietary supplementation of 0.125%~0.25% fermented G. biloba leaves can significantly enhance immunity, antioxidant capability, and lipid metabolism of blunt snout bream, as well as improve its disease resistance.
    Materialart: Online-Ressource
    ISSN: 0792-156X , 0792-156X
    URL: Article
    DOI: 10.46989/001c.20689
    Sprache: Englisch
    Verlag: SAABRON PRESS
    Publikationsdatum: 2015
    ZDB Id: 291787-7
    ZDB Id: 2542938-3
    SSG: 21,3
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 6
    Online-Ressource
    Online-Ressource
    Physical Responses of Lates calcarifer to Acute Nitrite Stress
    SAABRON PRESS ; 2019
    In:  Israeli Journal of Aquaculture - Bamidgeh Vol. 71 ( 2019-1-1)
    Details
    In: Israeli Journal of Aquaculture - Bamidgeh, SAABRON PRESS, Vol. 71 ( 2019-1-1)
    Kurzfassung: Abstract_The acute toxicity of nitrite (133.33, 266.66, 399.99mg/L) to 15 days posthatched Lates calcarifer (barramundi) was studied by semi-static bioassay method; 0 mg/L nitrite was used as control. Samples were obtained at 0, 6, 12, 24, 36, 48, 72 and 96 h respectively to measure and analyze the activity of antioxidant, digestive enzymes, and concentration of serum cortisol. Nitrite concentration and exposure time significantly affected the antioxidant and digestive enzymes activities. By the end of the experiment, superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities in the experimental group were significantly higher than in the control group, while peroxidase (POD) and catalase activities were significantly lower than in the control group except for in higher concentrations. Differing from POD and catalase, the acid phosphatase (ACP) activity of sub-concentration treatment was significantly higher than in the control group. Amylase activity in the nitrite stressed group was significantly lower than the control group, while the results of protease and lipase activity were reversed. Cortisol activity was delayed because of acute nitrite stress in the barramundi. Lates calcarifer showed certain short-term tolerance to nitrite stress. Results from the present study indicate that nitrite stress stimulates the responses of antioxidant and digestive enzyme activity and cortisol in fish, and these parameters can be used as physical indicators of stress.
    Materialart: Online-Ressource
    ISSN: 0792-156X , 0792-156X
    URL: Article
    DOI: 10.46989/001c.20993
    Sprache: Englisch
    Verlag: SAABRON PRESS
    Publikationsdatum: 2019
    ZDB Id: 291787-7
    ZDB Id: 2542938-3
    SSG: 21,3
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 7
    Online-Ressource
    Online-Ressource
    Molecular Cloning of Twist Gene and its Expression in Golden Pompano Trachinotus ovatus (Linnaeus 1758) Larvae at Different Water Temperatures
    SAABRON PRESS ; 2018
    In:  Israeli Journal of Aquaculture - Bamidgeh Vol. 70 ( 2018-1-1)
    Details
    In: Israeli Journal of Aquaculture - Bamidgeh, SAABRON PRESS, Vol. 70 ( 2018-1-1)
    Kurzfassung: The twist gene in golden pompano Trachinotus ovatus larvae was cloned and analyzed in this study. in the first 18 days the expression of twist during larval fish ontogeny was explored, then on 18 day post hatch (DPH) the expression of twist in fish tissues was evaluated. Subsequently, the response of twist to water temperatures of 23, 26, and 29oC was compared on 12 DPH and 18 DPH. The cDNA sequence length of the twist gene in golden pompano is 880 bp with an open reading frame of 507 bp. The twist gene encodes 168 amino acids and has a calculated molecular weight of 18.93 kDa and a theoretical isoelectric point of 9.14. After hatching, the expression of twist increased with fish age, and peaked at 3 and 4 DPH. The highest expression of twist in fish tissue occurred in the spleen and stomach, followed by the brain and kidney on 18 DPH. On 12 DPH, the highest expression of twist was observed in fish reared at 26oC, and lowest expression was observed in fish reared at 29oC. On 18 DPH, the expression of twist was not significantly affected by the rearing temperatures. This study identified the gene expression of twist at the early developmental stage of golden pompano; the time dependent expression of twist in fish larvae may improve knowledge of bone ontogeny and formation in fish larvae.
    Materialart: Online-Ressource
    ISSN: 0792-156X , 0792-156X
    URL: Article
    DOI: 10.46989/001c.20948
    Sprache: Englisch
    Verlag: SAABRON PRESS
    Publikationsdatum: 2018
    ZDB Id: 291787-7
    ZDB Id: 2542938-3
    SSG: 21,3
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
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