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- 저자 : N.A.D. Khattak (검색결과 2 건)
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A.W. Khan,F. Jan,A. Saeed,M. Zaka-ul-Islam,M. Abrar,N.A.D. Khattak,M. Zakaullah 한국물리학회 2013 Current Applied Physics Vol.13 No.7
Magnetic Pole Enhanced-Inductively Coupled Plasmas (MaPE-ICPs) in analogy to the conventional ICPs exhibit two modes of operation, depending on the power coupling mechanism, i.e., a low power mode with dominant capacitive coupling (E-mode) and a high power mode with dominant inductive coupling (H-mode). A comparative study of the electron temperature measured by a Langmuir probe ðTLP e Þ and the electron excitation temperature ðTOES exc Þ determined by Optical Emission Spectroscopy (OES) is reported in the two distinct modes of a MaPE-ICP operated in argon. The dependence of TLP e , TOES exc and their ratio ðTLP e =TOES exc Þ on applied power (5-50 W) and gas pressure (15-60 mTorr) is explored, and the validity of TOES exc as an alternative diagnostic to TLP e is tested in the two modes of MaPE-ICP. The OES based noninvasive measurement of the plasma parameters such as electron temperature is very useful for plasma processing applications in which probe measurements are limited.
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Effect of Storage Time on the Rancidity and Metabolizable Energy of Rice Polishing in Poultry
Pasha, T.N.,Khattak, F.M.,Khan, D.R.,Jabbar, M.A. Asian Australasian Association of Animal Productio 2008 Animal Bioscience Vol.21 No.3
The storage of rice polishing (RP) with and without addition of antioxidant for sixteen weeks and its effect on rancidity and metabolizable energy values during the summer season was determined. Fifteen Single Comb White Leghorn cockerels of approximately uniform age and weight were procured and kept in metabolic cages under standard feeding and management practices. Five force feeding trials were conducted. In the first trial, fresh RP with 0 weeks of storage (diet 1 and 2) was used followed by four feeding trials with 4 (diet 3, 4), 8 (diet 5, 6), 12 (diet 7, 8), and 16 (diet 9, 10) weeks of storage of RP. The same birds were used in all trails. The birds were fasted for a period of 21 h, followed by force feeding of 20 g of RP with and without antioxidant for all storage periods. The control/fasting group was also maintained to measure endogenous fecal losses. Excreta were collected after 48 h for the determination of AME and TME values of RP. Along with the biological trials, laboratory assay of the RP stored with and without antioxidant was conducted to measure the extent of rancidity in terms of Thiobarbituric acid value (TBA). The TBA values were affected (p<0.05) by storage period and the values increased when the storage period increased from 4 to 16 weeks. However, the TBA values were significantly reduced (p<0.05) when RP was stored after addition of antioxidant when compared with the values obtained from RP stored without antioxidant (diet 3 vs. 4, 5 vs. 6, 7 vs. 8, and 9 vs. 10). The AME MJ/kg and TME MJ/kg values of RP were neither affected by increase in storage period nor addition of antioxidant. The findings of this study revealed that there was no effect of rancidity and storage time on the nutritive value, AME or TME of RP in poultry. However, TBA values were increased with the increase in storage period.
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