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Foliar Responses of Peristrophe bicalyculata to Coal Smoke Fnllution
Nighat, Farah,Mahmooduzzafar,Iqbal, Muhammad 한국식물학회 1999 Journal of Plant Biology Vol.42 No.3
Study of the foliar responses of Peristrophe bicalyculata (Reth) Nees to the pollution caused by thermal power plant emissions revealed that the stomatal size, pore length, density, and index, as well as the photosynthetic rate and total chlorophyll content were reduced in P. bicalyculata plants at the polluted site in pre-flowering, flowering as well as post-flowering stage of plant growth. Contrary to this, stomatal conductance increased at each stage. The intercellular level of carbon dioxide was raised in the pre-flowering and flowering stages but decreased later at the polluted site.
The XRCC1 Arg399Gln Gene Polymorphism and Risk of Colorectal Cancer: a Study in Kashmir
Khan, Nighat Parveen,Pandith, Arshad Ahmad,Yousuf, Adfar,Khan, Nuzhat Shaheen,Khan, Mosin Saleem,Bhat, Imtiyaz Ahmad,Nazir, Zahoor Wani,Wani, Khursheed Alam,Hussain, Mahboob Ul,Mudassar, Syed Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.11
Background: The DNA repair gene XRCC1 Arg399Gln gene polymorphism has been found to be implicated in the development of various cancers, including colorectal cancer (CRC), in different populations. We aimed to determine any association of this polymorphism with the risk of CRC in Kashmir. Materials and Methods: A total of 120 confirmed cases of CRC and 146 healthy cancer free controls from the Kashmiri population were included in this study. Genotyping was carried out by the polymerase chain reaction- restriction fragment length polymorphism (PCR-RFLP) method. Results: Genotype frequencies of XRCC1 Arg399Gln observed in controls were 34.2%, 42.5% and 23.3% for GG (Arg/Arg), GA (Arg/Gln), AA( Gln/Gln), respectively, and 28.3%, 66.7% and 5% in cases, with an odds ratio (OR)=5.7 and 95% confidence interval (CI) =2.3-14.1 (p=0.0001). No significant association of Arg399Gln SNP with any clinicopathological parameters of CRC was found. Conclusions: We found the protective role of 399Gln allele against risk to the development of CRC. The XRCC1 heterozygote status appears to be a strong risk factor for CRC development in the Kashmiri population.
Design of Multivariable PID Controllers: A Comparative Study
Memon, Shabeena,Kalhoro, Arbab Nighat International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.8
The Proportional Integral Derivative (PID) controller is the most popular industrial controller and more than 90% process industries use this controller. During the past 50 years, numerous good tuning methods have been proposed for Single Input Single Output Systems. However, design of PI/PID controllers for multivariable processes is a challenge for the researchers. A comparative study of three PID controllers design methods has been carried-out. These methods include the DS (Direct Synthesis) method, IMC (Internal model Control) method and ETF (Effective Transfer Function) method. MIMO PID controllers are designed for a number of 2×2, 3×3 and 4×4 process models with multiple delays. The performance of the three methods has been evaluated through simulation studies in Matlab/Simulink environment. After extensive simulation studies, it is found that the Effective Transfer Function (ETF) Method produces better output responses among two methods. In this work, only decentralized methods of PID controllers have been studied and investigated.
Design of Multivariable PID Controllers: A Comparative Study
Memon, Shabeena,Kalhoro, Arbab Nighat International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.9
The Proportional Integral Derivative (PID) controller is the most popular industrial controller and more than 90% process industries use this controller. During the past 50 years, numerous good tuning methods have been proposed for Single Input Single Output Systems. However, design of PI/PID controllers for multivariable processes is a challenge for the researchers. A comparative study of three PID controllers design methods has been carried-out. These methods include the DS (Direct Synthesis) method, IMC (Internal model Control) method and ETF (Effective Transfer Function) method. MIMO PID controllers are designed for a number of 2×2, 3×3 and 4×4 process models with multiple delays. The performance of the three methods has been evaluated through simulation studies in Matlab/Simulink environment. After extensive simulation studies, it is found that the Effective Transfer Function (ETF) Method produces better output responses among two methods. In this work, only decentralized methods of PID controllers have been studied and investigated.
Rekha Garg,Anita Kumari,S. C. Joshi,Nighat Fahmi 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.8
A new series of Mn(II) and Mo(VI) complexes containing the Schiff bases hydrazinecarbothioamide and hydrazinecarboxamide of 5,6-dimethyl-1H-indol-2,3-dione have been synthesized.The nature of bonding and the stereochemistry of the complexes have been deduced from elemental analyses, molecular weight determinations and spectral studies viz. electronic IR, ESR, 1H NMR and 13C NMR and X-ray diffraction spectral studies. The magnetic moment values of the manganese(II) complexes are in the range of 5.80-6.15 B.M. suggesting a high spin state of manganese in these complexes. The spectral data are consistent with a tetrahedral geometry around Mn(II) and an octahedral geometry for Mo(VI), in which the ligands act as bidentate chelating agents, coordinated through the nitrogen and sulfur/oxygen atoms. The ligands and their metal complexes have been tested against a number of pathogenic fungi and bacteria at different concentrations and were found to possess sufficient fungicidal and bactericidal properties. Further, the complexes were also tested for their antifertility activity in male albino rats and the results were indeed positive.
New Butyrylcholinesterase Inhibitory Triterpenes from Salvia santolinifolia
Sajid Mehmood,Naheed Riaz,Sarfraz Ahmed Nawaz,Nighat Afza,Abdul Malik,Muhammad Iqbal Choudhary 대한약학회 2006 Archives of Pharmacal Research Vol.29 No.3
Slavins A (1) and B (2), the new amyrin type triterpenes, have been isolated from the chloroform soluble fraction of Salvia santolinifolia and assigned structures on the basis of spectral studies including 2D NMR. Both the compounds displayed inhibitory potential against the enzyme butyrylcholinesterase.
Design and Implementation of Router for NOC on FPGA
Gaurav Verma,Harsh Agarwal,Shreya Singh,Shaheem Nighat Khanam,Prateek Kumar Gupta,Vishal Jain 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.12
In today’s technological era, SOC has undergone rapid evolution and is still processing at a swift pace. But due to this explosive evolution of semiconductor industry, the devices are scaling down at a rapid rate and hence, SOC today have become communication-centric. However, the existing bus architectures comprising of wires for global interconnection in SOC design are undergoing design crises as they are not able to keep up with the rate of scaling down of devices. To overcome bottleneck of communication system, NOC is an upcoming archetype. In on-chip network, router is considered as an important component. This paper proposes router, its components and parameters which affects the entire design. Thus, to validate the functioning of NOC on hardware, router has been designed in VHDL and simulated in Xilinx ISE 14.1 targeting Xilinx XC5VLX30-3 FPGA.
Butyrylcholinesterase Inhibitory Guaianolides from Amberboa ramosa
Sher Bahadar Khan,Azhar-ul-Haq,Shagufta Perveen,Nighat Afza,Abdul Malik,Sarfraz Ahmad Nawaz,Muhammad Raza Shah,Muhammad Iqbal Choudhary 대한약학회 2005 Archives of Pharmacal Research Vol.28 No.2
Phytochemical investigation of the whole plant of Amberboa ramosa led to the isolation of six sesquiterpene lactones which could be identified as 8α-hydroxy-11β−methyl-1αH, 5αH, 6βH, 7αH, 11αH-guai-10(14), 4(15)-dien-6, 12-olide(1), 3β, 8α-dihydroxy-11α−methyl-1αH, 5αH, 6βH, 7αH, 11βH-guai-10(14), 4 (15)-dien-6, 12-olide (2), 3β, 4α, 8α-trihydroxy-4β-(hydroxymethyl)- 1αH, 5αH, 6βH, 7αH-guai-10(14), 11(13)-dien-6, 12-olide (3), 3β, 4α, 8α-trihydroxy-4β- (chloromethyl)-1αH, 5αH, 6βH, 7αH-guai-10(14),11(13)-dien-6, 12-olide(4), 3β, 4α, dihydroxy- 4β-(hydroxymethyl)-1αH, 5αH, 6βH, 7αH-guai-10(14),11(13)-dien-6, 12-olide(5), 3β, 4α-dihydroxy- 4β- (chloromethyl)-8α-(4-hydroxymethacrylate)-1αH, 5αH, 6βH, 7αH-guai-10(14),11 (13)-dien-6,12-olide (6) by spectroscopic methods. All of them showed inhibitory potential against butyrylcholinesterase.
Ophiamides A-B, New Potent Urease Inhibitory Sphingolipids from Heliotropium ophioglossum
Sadiqa Firdous,Abdul Malik,Nida Hassan Ansari,Itrat Fatima,Nighat Afza,Lubna Iqbal,Mehreen Lateef 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.7
Ophiamides A (1) and B (2), two new sphingolipids have been isolated from the n-hexane subfraction of the MeOH extract of the whole plant of Heliotropium ophioglossum along with glycerol monopalmitate (3) and β-sitosterol 3-O-β-D-glucoside (4) reported for the first time from this species. Their structures were elucidated by spectroscopic techniques including MS and 2D-NMR spectroscopy. Both the compounds 1 and 2 showed potent inhibitory activity against the enzyme urease.