|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Vegetation-environment relationships in the forests of Chitral district Hindukush range of Pakistan显示文摘We investigated the composition of plant communities to quantify their relationships with environmental parameters in the Chitral Hindukush range of Pakistan. We sampled tree vegetation using the Point Centered Quarter (PCQ) method while understory vegetation was sampled in 1.5-m circular quadrats. Cedrus deodara is the national symbol of Pakistan and was dominant in the sampled communities. Because environmental variables determine vegetation types, we analyzed and evaluated edaphic and topographic factors. DCA-Ordination showed the major gradient as an amalgam of elevation (p<0.05) and slope (p<0.01) as the topographic factors correlated with species distribution. Soil variables were the factors of environmental significance along DCA axes. However, among these factors, Mg2+ , K + and N2+ contributed not more than 0.054% 0.20% and 0.073%, respectively, to variation along the first ordination axis. We conclude that the principal reason for weak or no correlation with many edaphic variables was the anthropogenic disturbance of vegetation. The understory vegetation was composed of perennial herbs in most communities and was most dense under the tree canopy. The understory vegetation strongly regulates tree seedling growth and regeneration patterns. We recommend further study of the understory vegetation using permanent plots to aid development of forest regeneration strategies. | Nasrullah Khan Syed Shahid Shaukat Moinuddin Ahmed Muhammad Faheem Siddiqui | 2013 | Journal of Forestry Research2013，24，2： | 8 |
| 2 | Phytosociology, structure and dynamics of Pinus roxburghii associations from Northern Pakistan显示文摘We investigated the phytosociology, structure and dynamics of Pinus roxburghii in 40 stands in northern areas of Pakistan by using cluster analysis(Ward's agglomerative clustering) and ordination(Nonmetric Multidimensional Scaling). Cluster analysis revealed three major groups associated with specific environmental characteristics:(1) P. roxburghii(2) Pinus-Quercus baloot and(3) Pinus-Olea ferruginea community types. NMS-ordination showed the major gradient as an amalgam of elevation(r2 = 0.441, p <0.01) and slope(r2 = 0.391, p <0.05) as the two topographic factors correlated with species distribution. The first ordination axis also showed positive correlation with soil variables like pH and electrical conductivity, suggesting that soil chemistry was related to topographic characteristics and probably acted as a secondary gradient. We also examined size class distributions, age structures and growth rates of the three communities in order to describe community development and dynamics. Total tree density was 14700 plants/ha, with P. roxburghii having a relative density of 82% to 100%. Density of juvenile and total density and basal area of the subordinate tree species were low. The low density of trees in the smallest diameter size-class suggested that the recruitment of small P. roxburghii plants into the adult population may be lower than the required replacement rate for the stands. Pooled size-class distributions for the species showed a multimodal pattern with some regeneration gaps. Browsing, heavy logging and other anthropogenic activities were the overriding factors responsible for the poor recruitment of P. roxburghii. We concluded from the age structure that the forests were characterized by the dominance of young trees. Growth rate analysis revealed that P. roxburghii was the fastest growing species among the conifers species in Pakistan. In view of its relatively fast growth and longevity, P. roxburghii seems to be a suitable choice for short-term cultural practices in order to enhance wood production in lesser Himalaya and Hindukush ranges of Pakistan. | Nasrullah Khan Kishwar Ali Shahid Shaukat | 2014 | Journal of Forestry Research2014，25，3： | 5 |
| 3 | Environmental Suitability and Distribution of the Caucasian Rock Agama,Paralaudakia caucasia (Sauria:Agamidae) in Western and Central Asia显示文摘Predictive potential distribution modeling is crucial in outlining habitat usage and establishing conservation management priorities.In this paper we provide detailed data on the distribution of the Caucasian rock agama Paralaudakia caucasia,and use species distribution models(MAXENT) to evaluate environmental suitability and potential distribution at a broad spatial scale.Locality data on the distribution of P.caucasia have been gathered over nearly its entire range by various authors from f ield surveys.The distribution model of P.caucasia showed good performance(AUC=0.887),and predicted high suitability in regions mainly located in Tajikistan,north Pakistan,Afghanistan,southeast Turkmenistan,northeast Iran along the Elburz mountains,Transcaucasus(Azerbajan,Armenia,Georgia),northeastern Turkey and northward along the Caspian Sea coast in Daghestan,Russia.The identifi cation of suitable areas for this species will help to assess conservation status of the species,and to set up management programs. | Seyyed Saeed HOSSEINIAN YOUSEFKHANI Gentile Francesco FICETOLA Nasrullah RASTEGAR-POUYANI Natalia B ANANJEVA Eskandar RASTEGAR-POUYANI Rafaqat MASROOR | 2013 | Asian Herpetological Research2013，4，3： | 4 |
| 4 | Future of Abies pindrow in Swat district,northern Pakistan显示文摘Swat district is a biodiversity hub of Pakistan.The plant species,especially trees,in the Swat District are exposed to extinction threat from global climate change.Maximum entropy(MaxEnt)modelling of species distribution,using HADCM3 A2a global climate change scenario,predicted a considerable change in the future distribution of Abies pindrow(Royle ex D.Don)Royle.AUC(area under the curve)values of 0.972 and0.983 were significant for the present and future distribution models of the species,respectively.It is clear that bioclimatic variables such as the mean temperature of the warmest quarter(bio_10)and the annual temperature range(bio_7)contribute significantly to the model and thus affect the predicted distribution and density of the species.The future model predicts that by the year 2080 population density will have decreased significantly.The highest density of the species is recorded in the eastern and western borders of the Valley in the areas of Sulatanr and Mankial.The changes in density and distribution of the species can have considerable impact,not only on the tree species itself,but on the associated subflora as well. | Kishwar Ali Habib Ahmad Nasrullah Khan Stephen Jury | 2014 | Journal of Forestry Research2014，25，1： | 4 |
| 5 | High performance electrocoagulation process in treating palm oil mill effluent using high current intensity application显示文摘Electrocoagulation process using high current intensity to treat palm oil mill effluent(POME) was investigated in this study.Various operating parameters such as electrolysis time, inter-electrode distance and initial pH were carried out to determine the efficient process condition on the removal of chemical oxygen demand(COD),biological oxygen demand(BOD) and suspended solids(SS).The highest treatment was achieved at 50 min with the removal efficiencies for COD, BOD and SS obtained as 85%, 83%, and 84%, respectively.More than 50 min treatment showed the fluctuated trends of removal efficiencies which can be considered insignificant.The application of higher current resulted in higher removals of organics while the gas bubbles also assisted in removing the pollutant particles by floatation.In an inter-electrode distance study, the removal efficiency decreased when inter-electrode distance was either higher or lower than 10 mm due to the increase of solution resistance and the decrease of anode active surface area.In initial pH study, it was found that high removal efficiencies were achieved in slightly acidic POME sample rather than in neutral or basic condition.An electrocoagulation process by using the optimum operating parameters was able to remove COD, BOD and SS up to 95%, 94% and 96% respectively.The experimental results confirm that application of high current intensity in electrocoagulation provided high treatment efficiency at a reduced reaction time. | Mohd Nasrullah A.W.Zularisam Santhana Krishnan Mimi Sakinah Lakhveer Singh Yap Wing Fen | 2019 | Chinese Journal of Chemical Engineering2019，27，1： | 2 |
| 6 | Hollow fiber-based liquid phase microextraction followed by analytical instrumental techniques for quantitative analysis of heavy metal ions and pharmaceuticals显示文摘Hollow-fiber liquid-phase microextraction(HF-LPME)and electromembrane extraction(EME)are miniaturized extraction techniques,and have been coupled with various analytical instruments for trace analysis of heavy metals,drugs and other organic compounds,in recent years.HF-LPME and EME provide high selectivity,efficient sample cleanup and enrichment,and reduce the consumption of organic sol-vents to a few micro-liters per sample.HF-LPME and EME are compatible with different analytical in-struments for chromatography,electrophoresis,atomic spectroscopy,mass spectrometry,and electrochemical detection.HF-LPME and EME have gained significant popularity during the recent years.This review focuses on hollow fiber based techniques(especially HF-LPME and EME)of heavy metals and pharmaceuticals(published 2017 to May 2019),and their combinations with atomic spectroscopy,UV-VIS spectrophotometry,high performance liquid chromatography,gas chromatography,capillary elec-trophoresis,and voltammetry. | Wajid Ali Khan Muhammad Balal Arain Yadollah Yamini Nasrullah Shah Tasneem Gul Kazi Stig Pedersen-Bjergaard Mohammad Tajik | 2020 | Journal of Pharmaceutical Analysis2020，10，2： | 2 |
| 7 | Silicosis mor- tality with respiratory tuberculosis in the United States, 1968 -2006 显示文摘 | NASRULLAH M MAZUREK J M WOOD J M | 2011 | Am J Epidemiol2011，174，7： | 1 |
| 8 | Automated parallel polyurethane dispersion synthesis and characterization显示文摘 | Nasrullah M J Bahr J A Gallagher-Lein C | | 0，，01： | 1 |
| 9 | Unintentional falls mortality among elderly in the United States: Time for action显示文摘 | Hasanat Alamgir Sana Muazzam Muazzam Nasrullah | 2011 | Injury2011，，： | 1 |
| 10 | A practical route for the preparation of poly (4 - hydroxystyrene) , a useful photoresist material 显示文摘 | Nasrullah J Mohammed Raja S | 2000 | Journal of Polymer Science Part A: Polymer Chemistry2000，38，3： | 1 |
| 11 | Differential electrophysio- logical response during rest, self-referential, and non-self-referen- tial tasks in human posteromedial cortex显示文摘 | Dastjerdi M Foster BL Nasrullah S | 2011 | Proc Natl Acad Sci USA2011，108，： | 1 |
| 12 | An interacting scenario for dark energy in a Bianchi type-I universe显示文摘We study the interaction between dark energy(DE) and dark matter in the scope of anisotropic Bianchi type-I space-time. First we derive the general form of the DE equation of state(EoS) parameter in both non-interacting and interacting cases and then we examine its future by applying a hyperbolic scale factor. It is shown that in the non-interacting case, depending on the value of the anisotropy parameter K,the DE EoS parameter varies from phantom to quintessence whereas in the interacting case the EoS parameter varies in the quintessence region. However, in both cases, the DE EoS parameter ωdeultimately(i.e. at z =-1) tends to the cosmological constant(ωde=-1). Moreover, we fix the cosmological bound on the anisotropy parameter K by using recent observational data about the Hubble parameter. | Hassan Amirhashchi Syed Nasrullah Ali Qazi Hishamuddin Zainuddin | 2014 | Research in Astronomy and Astrophysics2014，14，11： | 1 |
| 13 | Novel tailor-made diols for polyurethane coatings using a combination of controlled radical polymerization, ring opening polymerization, and click chemistry 显示文摘 | VORA ANKIT NASRULLAH MOHAMMED J WEBSTER DEAN C | 2010 | Journal of Coatings Technology and Research2010，7，4： | 1 |
| 14 | The effect of tetrahydrofuran as solvent on matrix-assisted laser desorptlon/ ionization and ele tmspray ionization mass spectra of functional polystyrenes 显示文摘 | Zagorevskii D V Nasrullah M J Raghunadh V | 2006 | Rapid Communications in Mass Spectrometry2006，20，2： | 1 |
| 15 | Fresh tuber yield stability analysis of fifteen cassava genotypes across five environments in east Java (Indonesia) using GGE biplot显示文摘 | Noerwijati K Nasrullah Taryono | 2014 | Energy Procedia2014，47，： | 1 |
| 16 | Efficacy and tolerability of carbamazepine for the treatment of painful diabetic neuropathy in adults:a 12-week,open-label,multicenter study显示文摘 | Saeed T Nasrullah M Ghafoor A | 2014 | Int J Gen Med2014，7，： | 1 |
| 17 | Modeling the Past and Current Distribution and Habitat Suitability for Ablepharus grayanus and A. pannonicus(Sauria: Scincidae)显示文摘Study of the climate variability in the past and present, and correlating those with changes in the distribution range of species has attracted considerable research interest. The genus Ablepharus consists of 10 recognized species, of which A. bivittatus, A. grayanus and A. pannonicus are documented from Iran. In the present study, we modeled with Max Ent the potential distribution areas and determined the suitable habitats in past(mid-Holocene [MH], and the Last Interglacial [LIG]) and their current distribution for two species of snake-eyed skinks(A. grayanus and A. pannonicus) separately. Models of the species indicated good fit by the average high area under the curve(AUC) values(A. grayanus= 0.929 ± 0.087 and A. pannonicus = 0.979 ± 0.007). Precipitation of the driest quarter of the year, mean temperature of the coldest quarter of the year, and precipitation of the driest month variables made important contributions to A. grayanus. Two important climate variables contributed importantly to A. pannonicus; temperature seasonality, and mean temperature of the wettest quarter of the year, and one topographic variable, slope. We conclude that these variables form a natural barrier for species dispersal. The MH and the LGM models indicated a larger suitable area than the current distribution. | Rasoul KARAMIANI Nasrullah RASTEGAR-POUYANI Eskandar RASTEGAR-POUYANI | 2018 | Asian Herpetological Research2018，9，1： | 1 |
| 18 | Computational identification of interplay between phosphorylation and O-!3-glycosylation of human occludin as potential mechanism to impair hepatitis C virus entry显示文摘 | Butt AM Feng D Nasrullah I | 2012 | Infect Genet Evol2012，12，6： | 1 |
| 19 | Silicosis mortality with respiratory tuberculosis in the United States,1968-2006显示文摘 | Nasrullah M Mazurek JM Wood JM | 2011 | Am J Epidemiol2011，174，7： | 1 |
| 20 | Unintentional falls mortality among elderly in the United States: time for action 显示文摘 | Alamgir H Muazzam S Nasrullah M | 2012 | Injury2012，43，12： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员