oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 4 )

2018 ( 25 )

2017 ( 23 )

2016 ( 29 )

Custom range...

Search Results: 1 - 10 of 2566 matches for " Sajjad Saeed "
All listed articles are free for downloading (OA Articles)
Page 1 /2566
Display every page Item
Spatial variation in pollinator communities and reproductive performance of Prosopis juliflora (Fabaceae)
Asif Sajjad,Shafqat Saeed,Muhammad Amjad Bashir
Journal of Pollination Ecology , 2012,
Abstract: This study was conducted in an effort to understand the effects of spatial variations in pollinator assemblage due to habitat isolation on the reproductive performance of perennial plant species. Variations in pollinator assemblage structure (abundance, diversity and Shannon-Wiener index) were studied at three widely isolated (100 to 200 km apart) nature reserves of Southern Punjab, Pakistan, in order to explore its effects on reproductive performance of Prosopis juliflora. Species richness and abundance were highest in Pirowal Sanctuary followed by Chichawatni Sanctuary and Chak Katora forest reserve. The pollination system of P. juliflora was highly generalized with 77 insect visitor species in four orders among all the three sites. However, pollinator assemblage varied significantly in composition among the sites. Out of the four reproductive parameters considered, the number of pods per raceme and germination varied significantly among the three locations. The reproductive performance of P. juliflora in terms of number of pods per raceme and germination improved with abundance of pollinators.
Assessment of Forest Growing Stock of Timergara Forest Subdivision, Dir Lower Forest Division  [PDF]
Majid Ullah, Amjad Ali Khan, Aamir Saleem, Sajjad Saeed, Umar Wahab
Open Journal of Ecology (OJE) , 2015, DOI: 10.4236/oje.2015.511044
Abstract: The present study was aimed to assess the growing stock of Timergara forest subdivision which was a part of Dir lower forest division (Pakistan). The study area was divided into two different climatic zones (i.e. sub-tropical sub humid and sub-humid temperate zones) on the basis of altitudinal considerations. A total of 43 sample plots are taken in the forest area of 8480 hectare with random sampling technique representing 0.5% of the total forest area. Each sample plot size was of one hectare. In each 100 × 100 m (1 ha plot), number of trees, diameter, age, height, increment, form factor and volume were measured. An interrelation between the diameter (independent variable) and all the other dependent variables (volume, increment and height) were found. At the end, volume tables were made which suited the local conditions as the ones used before were not suited to the local conditions.
The Carbon Sinks and Mitigation Potential of Deodar (Cedrus deodara) Forest Ecosystem at Different Altitude in Kumrat Valley, Pakistan  [PDF]
Adnan Ahmad, Muhammad Amir, Abdul Mannan, Sajjad Saeed, Sher Shah, Sami Ullah, Rahman Uddin, Qijing Liu
Open Journal of Forestry (OJF) , 2018, DOI: 10.4236/ojf.2018.84034
Abstract: Forest carbon monitoring and reporting are critical for informing global climate change assessment. The regional estimates of forest carbon attached greater attention, to assess the role of forest in carbon mitigation. Here using field inventory, we examined the carbon sink and mitigation potential of monospecific Deodar forest in the Kumrat valley, of Hindu Kush Himalaya, Region of Pakistan, at a different elevation. The elevation of monospecific Deodar forest ranges from 2300 to 2700 m (a.s.l). We divided the forest into three elevation classes (that is 2300 - 2400 m (EI) 2400 - 2500 m (EII) and 2500 - 2700 m (EIII) a.s.l respectively). In each elevation class, we laid out 09 sample plots (33*33 m2) for measuring carbon values in living tree biomass (LT), soil (SC), litter, dead wood, cone (LDWC) and understory vegetation (USV). Our results showed that the carbon density at EI was 432.37 ± 277.96 Mg·C-1, while the carbon density at EII and EIII was 668.35 ± 323.94 and 1016.79 ± 542.99 Mg·C-1 respectively. Our finding revealed that the carbon mitigation potential of the forest increases with increasing elevation. Among the different elevation classes, EIII stored significantly higher carbon due to the dominance of mature, old age, larger trees, and the minimum anthropogenic disturbance, whereas EI stored statistically lower carbon because of maximum anthropogenic disturbance, which resulted in the removal of mature and over-mature trees. Furthermore, our correlation analysis between tree height and carbon stock and basal area and LT carbon, underlines that the basal area is the stronger predictor of LT carbon estimation than height. Overall our results highlight that deodar forest stored 716.94 ± 462.06 Mg?C·ha-1. However, the rehabilitation, preservation and sustainable management of disturb forest located at a lower elevation could considerably improve carbon mitigation potential.
Anilinium-3-carboxylate 3-carboxyanilinium nitrate
Saeed Ahmad,Sajjad Hussain,Shahzad Sharif,Islam Ullah Khan
Acta Crystallographica Section E , 2013, DOI: 10.1107/s1600536812049392
Abstract: The title compound, C7H8NO2+·NO3 ·C7H7NO2, exists in the form of a protonated dimer of two anilinium-3-carboxylate molecules related by an inversion center, and a nitrate anion located on a twofold rotation axis. The bridging H atom occupies, with equal probability, the two sites associated with the carboxyl atoms. In addition to the strong O—H...O hydrogen bond, in the crystal, the various units are linked via N—H...O and C—H...O hydrogen bonds forming a three-dimensional structure.
Improved Bacterial Foraging Algorithm for Optimum Economic Emission Dispatch with Wind Power
Sajjad Farajianpour,Ali Mohammadi,Saeed Tavakoli,S. Masoud Barakati
TELKOMNIKA : Indonesian Journal of Electrical Engineering , 2012, DOI: 10.11591/telkomnika.v10i4.851
Abstract: In this paper, an improved bacterial foraging algorithm (IBFA) is employed to solve economic-emission dispatch (EED) problem. Regarding to more interest to renewable energy sources especially wind energy in recent years, it is necessary to use of incorporate wind power plants into EED problem. To consider realistic conditions, EED is included bi-objective of cost and NOx emission. The problems encountered with BFA are ineffective bacteria elimination resulted in poor performance. To overcome this, a modified BFA is proposed in reproduction step. EED is performed both with and without wind power plant subjected to couple of constraints using proposed approach and investigated from stand point of cost generation, and grid losses. Simulation results verify the accuracy of the proposed algorithm.
Fluctuations Mitigation of Variable Speed Wind Turbine through Optimized Centralized Controller
Ali Mohammadi,Sajjad Farajianpour,Saeed Tavakoli,S. Masoud Barakati
TELKOMNIKA : Indonesian Journal of Electrical Engineering , 2012, DOI: 10.11591/telkomnika.v10i4.854
Abstract: A wind energy conversion system (WECS) including a variable wind turbine in grid-connected mode is considered to control. In this paper, each component of WECS model is systematically presented and then the integrated overall model is validated.Regarding to nonlinear nature of WECS and the complex system structure as multiple-input- multiple-output (MIMO),control procedure counters the problem which strategy to handle.To simplify the control policy, a centralized controller which is compatible with systematic modelling introduced, is employed. In other hand to augment the centralized controller performance, an optimization based on genetic algorithm (GA) is accomplished. Simulation results demonstate the proper efficiency in fluctuations mitigation.
Combining Ability Analysis for Some Polygenic Traits in a 5X5 Diallel Cross of Bread Wheat (Triticum aestivum L.)
Muhammad Aslam Chowdhry,Muhammad Sajjad Saeed,Ihsan Khaliq,Muhammad Ahsan
Asian Journal of Plant Sciences , 2005,
Abstract: The experiment was conducted to evaluate and select strains/varieties of wheat in terms of their genetic values and also to make selection criteria for further breeding program. Mean squares for general combining ability were highly significant for flag leaf area, number of fertile tillers per plant and significant for spike length while non-significant for plant height and peduncle length. Specific combining ability mean squares were highly significant for plant height, number of fertile tillers per plant and peduncle length, while non-significant for flag leaf area and spike length. Mean squares for reciprocal effects were non-significant for all the traits under study. Additive gene effects controlled the expression of the traits like flag leaf area, number of fertile tillers per plant and spike length as is evident by greater mean squares for general combining ability while non-additive type of gene action indicated the pre-dominant role for plant height and peduncle length. However it is concluded from the results that flag leaf area, number of fertile tillers per plant and spike length might be used as selection criteria for further breeding program.
Genetic Analysis for Some Metric Traits in Aestivum Species
Muhammad Sajjad Saeed,Muhammad Aslam Chowdhry,Muhammad Ahsan
Asian Journal of Plant Sciences , 2005,
Abstract: Mean squares for General Combining Ability (GCA) were highly significant for number of spikelets per spike while non-significant for spike density, number of grains per spike, 1000-grain weight and grain yield per plant. Specific combining ability mean squares were highly significant for spike density, number of grains per spike; 1000-grain weight and grain yield per plant. While significant for number of spikelets per spike. Mean squares for reciprocal effects were highly significant for number of spikelets per spike and number of grains per spike while non-significant for spike density and 1000-grain weight. Additive gene effects controlled the expression of the traits like number of spikelets per spike and number of grains per spike as is evident by greater mean squares for general combining ability. However the gene action was non-additive for spike density, number of grains per spike, 1000-grain weight and grain yield per plant as indicated by the greater mean squares of SCA variances than GCA ones. It is therefore suggested from the results that number of spikelets per spike and number of grains per spike can be transferred from the parents to the progeny with additive effects, which are ultimately responsible for increased grain yield.
Timothy Hay Business in Alberta: Business Models and Supply Chain Issues  [PDF]
Sajjad Zahir
American Journal of Industrial and Business Management (AJIBM) , 2013, DOI: 10.4236/ajibm.2013.32021
Abstract:

This paper presents the business model and supply chain issues of Timothy hay business in Southern Alberta. Production, processing, marketing and distribution aspects of the business are described. Research was conducted using case-based field studies involving Timothy farmers, hay plant operators and forage research scientists. It is recommended that further research in raising yield of hay production and a better management of freight and exchange rate fluctuations will be greatly beneficial to this sector of business.

Synthesis and Modification of Carboxylated Multi Wall Nanotubes with Atenolol  [PDF]
Sajjad Sedaghat
Soft Nanoscience Letters (SNL) , 2014, DOI: 10.4236/snl.2014.43011
Abstract:

In this paper functionalized multiwall carbon nanotubes (FMWCNT) were modified using atenolol as a class of drugs that were used in cardiovascular diseases containing reactable nitrogen, which could attach chemically to functionalized MWCNT. This product was characterized by Fourier transform infrared spectroscopy (FT-IR) and Raman spectroscopy. These spectrums proved the existence of nitrogen atoms of amide due to new functional group. The morphology were also determined by scanning electron microscopy (SEM) and showed that this product was synthesized in the nanometer dimension. Thermal gravimetery (TGA) analysis was also used to evaluate thermal properties.

Page 1 /2566
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.