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Abstract

Chunky graphite has been recognized for a long time as one of the major problems in production of heavy section nodular cast iron. A great number of studies have been conducted to describe the chunky graphite formation, but a clear understanding of its appearance and a safe mastering of the melt preparation to avoid chunky graphite are not yet available. In the present work the cooling curves were recorded in large cone blocks and standard TA cup. According to measured data from the cone block, melt characteristics and heat transfer coefficient between casting and mould were adjusted in the ProCAST® simulation software. For a near-eutectic nodular cast iron test melt with 0.7 wt. % Ni, relationship between the area of the cone block affected by chunky graphite and simulation software results has been observed, i.e., thermal modulus and time to solidus.

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Authors and Affiliations

B. Bauer
I. Mihalic Pokopec
M. Petrič
P. Mrvar
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Abstract

The aim of this study is to determine the protective efficacy of anise in cerebral ischemia and reperfusion injury in rats. In this study, 28 Wistar Albino rats, weighing 250-300 grams (g), were used. Four groups were formed with 7 rats in each group. Group 1 (n=7): Control group, Group 2 (n=7): Anise group, 5 mL/kg/day of anise aqueous extract prepared according to Gamberini’s protocol was given orally by gavage for 30 days. Group 3 (n=7): Cerebral ischemia reperfusion (CIR) group, at the beginning of the experiment, 30 minutes of cerebral ischemia and 1 hour of reperfusion were induced and the animals were sacrificed by exanguination. Group 4 (n=7): Anise+ CIR group, After administering 30 days of anise’s aqueous extract, CIR was induced and the study was terminated. TOS values of the Anise+ CIR group was significantly lower than that of the CIR group (p<0.05). Il-6 and TNF-α values of the CIR group were significantly higher than the Anise+ CIR group (p<0,05). Our study revealed that anise ameliorates oxidative damage and inflammation due to cerebral ischemia/reperfusion, by reducing the levels of inflammatory cytokines (TNF-α, Il-6).
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Bibliography

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Authors and Affiliations

E. Yildizhan
1
H. Ozesmer
2
M.M. Inan
2
F. Tatli
2
M. Rencber
3
A. Akbas
2
M. Kamar
2
E. Gündüz
4
N. Baksi
5
B.V. Ulger
2
M. Akkuş
1
A. Kaydu
6

  1. Department of Histology and Embryology, Faculty of Medicine, Dicle University, 21280, Diyarbakır, Turkey
  2. Department of General Surgery, Faculty of Medicine, Dicle University, 21280, Diyarbakır, Turkey
  3. Department of General Surgery, Viransehir State Hospital, 63700, Viransehir, Şanlıurfa, Turkey
  4. Department of Emergency Medicine, Faculty of Medicine, Dicle University, 21280, Diyarbakır, Turkey
  5. Department of Laboratuary Animals, Faculty of Veterinary, Dicle University, 21280, Diyarbakır, Turkey
  6. Department of Anesthesia, Faculty of Medicine, Dicle University, 21280, Diyarbakır, Turkey

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