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28篇 您的检索式:作者名="Perveen M"
    题名 作者 年代 出处 被引量
1Isolation and structure elucidation of three glycosides and a long chain alcohol from Polianthes tuberosa Linn 显示文摘Kha K M Perveen S Ayattollahi S A 2002Nat Prod Lett2002,16,4:1
2Epimers from the leaves of Calophyllum inophyllum 显示文摘ALI M S MAHMUD S PERVEEN S 1999Phytochemistry1999,50,:1
3Epimers from the leaves of Calophyllum inophyllum显示文摘Ali M S Mahmud S Perveen S 1999Phytochemistry1999,50,8:1
4Pollen flora of Pakistan : 36, Flacourtiaceae显示文摘Perveen A Qaiser M 2000 2000Palaistan J Bot2000,32,1:1
5Effects of bismuth on structural and dielectric properties of cobalt-cadmium spinel ferrites fabricated via micro-emulsion route显示文摘Spinel ferrites have a significant role in high-tech applications.In the present work nano-crystalline ferrites having general formula Co0.5Cd0.5BixFe2-xO4 with(x=0.0,0.05,0.1,0.15,0.2,and 0.25)are synthesized via micro-emulsion route.Powder x-ray diffraction(XRD)studies discover the FCC spinel structure.Crystalline size is calculated in a range of 11 nm-15 nm.Lattice parameter calculations are reduced due to its substitution which leads to the exchange of large ionic radius of Fe^3+for small ionic radius of Bi^3+.The x-ray density is analyzed to increase with doping.Fourier transform infrared spectroscopy(FTIR)is performed to analyze absorption band spectra.The two absorption bands are observed in a range of 400 cm^-1-600 cm^-1,and they are the characteristic feature of spinel structure.Thermo-gravimetric analysis(TGA)reveals the total weight loss of nearly 1.98%.Dielectric analysis is carried out by impedance analyzer in a frequency span from 1 MHz to 3 GHz by using the Maxwell Wagner model.Dielectric studies reveal the decrease of dielectric parameters.The alternating current(AC)conductivity exhibits a plane behavior in a low frequency range and it increases with the applied frequency increasing.This is attributed to the grain effects in a high frequency range or may be due to the reduction of porosity.Real and imaginary part of impedance show the decreasing trend which corresponds to the grain boundary action.The imaginary modulus shows the occurrence of peak that helps to understand the interfacial polarization.Cole-Cole graph shows a single semicircle which confirms that the conduction mechanism is due to the grain boundaries at low frequency.Dielectric studies reveal the applicability of these ferrites in high frequency equipment,microwave applications,high storage media,and semiconductor devices.Furhaj Ahmed Sheikh Muhammad Khalid Muhammad Shahzad Shifa H M Noor ul Huda Khan Asghar Sameen Aslam Ayesha Perveen Jalil ur Rehman Muhammad Azhar Khan Zaheer Abbas Gilani 2019Chinese Physics B2019,28,8:1
6lnhibitors of apoptotic proteins: new targets for anticancer therapy 显示文摘Saleem M Qadir MI Perveen N 2013Chem Biol Drug Des2013,82,3:1
7Pretreatment of seed with H2 02 improves salt tolerance of wheat seedlings by alleviation of oxidative damage and expression of stress pro- teins 显示文摘Wahid A Perveen M Gelani S 2007Journal of Plant Physiology2007,164,3:1
8Pretreatment of seed with H2O2improves salt tolerance of wheat seedlings by al-leviation of oxidative damage and expression of stress pro- teins显示文摘Wahid A Perveen M Gelani S 2007Journal of Plant Physiology2007,164,3:1
9Prevalence and health-care seeking pattern of patients with functional diarrhoea in an urban community of Bangladesh显示文摘Perveen I Hasan M 2010Mymensingh Med J2010,19,1:1
10Domain disruption and mutation of the bZIP transcription factor,MAF,associated with cataract,ocular anterior segment dysgenesis and coloboma显示文摘Jamieson RV Perveen R Kerr B Carette M Yardley J Heon E 2002Hum Mol Genet2002,11,:1
11Pollen Flora of Pakistan-Tamaricaceae 显示文摘Qaiser M Perveen A 2004Pakistan Journal of Botany2004,36,1:1
12Pretreatment of seed with Hz 02 improves salt tolerance of wheat seedlings by allevia- tion of oxidative damage and expression of stress proteins显示文摘Wahid A Perveen M Gelani S 2007Journal of Plant Physiology2007,164,3:1
13Dams and Development:Report on a Policy Dialogue显示文摘J Bandyopadhyay B Mallik M Mandal S Perveen 2002Economic and Political Weekly2002,37,40:1
14Inhibitors of apoptotic proteins: new targets for antieaneer therapy显示文摘Saleem M Qadir MI Perveen N 2013Chem Biol Drug Des2013,82,3:1
15The effects of lead and zinc on the quality of semen of albino rats 显示文摘Rafique M Khan N Perveen K 2009J Call Physicians Surg Pak2009,19,8:1
16Inhibitors of apoptotic proteins:new targets for anticancer therapy显示文摘SALEEM M QADIR M I PERVEEN N 2013Chem Biol Drug Des2013,82,3:1
17Tertiary amines promoted synthesis of symmetrical 1,3-disubstituted ureas 显示文摘Abdul Hai S M Perveen S Khan R A 2003Natural product research2003,17,5:1
18The effect soflead and zinc on the quality of semen of albino rats 显示文摘Bafique M Khan N Perveen K 2009J Col] Physicians Surg Pak2009,19,8:1
19Biochemical basis of insect resistance in coton 显示文摘Shahida Perveen S Qaisrani T M Amin S 2001Online Journal of Biological Sciences2001,1,6:1
20Expeditious Method for Synthesis of Symmetrical 1,3 -Disubstituted Ureas and Thioureas显示文摘Perveen S Abdul Hai S M Khan R A 2005Synthetic communications2005,35,12:1
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