Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 59 )

2018 ( 100 )

2017 ( 94 )

2016 ( 113 )

Custom range...

Search Results: 1 - 10 of 7369 matches for " MUHAMMAD MANSUR "
All listed articles are free for downloading (OA Articles)
Page 1 /7369
Display every page Item
The Occurrence of Hybrid in Nepenthes hookeriana Lindl. from Central Kalimantan can be Detected by RAPD and ISSR Markers
HAYATI Journal of Biosciences , 2012,
Abstract: Nepenthes spp. (Nepenthaceae) is one of the most popular ornamental plants in Southeast Asia. There are 97 species of Nepenthes to which 64 are found in Indonesia with the center of its diversity located in Borneo. N. x hookeriana was hypothesised to be a natural hybrid between N. ampullaria and N. rafflesiana on the basis of morphological characters. Several variants of each species were also known. This present study aimed to detect the occurrence of hybrid within N. x hookeriana ‘spotted’ and ‘green’ variant using random amplified polymorphic DNA (RAPD) and inter-simple sequence repeats (ISSR). Five RAPD primers and three ISSR primers were used to amplify total DNA genome and produced 83 polymorphic bands ranging in size from 300-1700 bp. Clustering analysis was performed based on RAPD and ISSR profiles using the UPGMA method. The genetic similarity of the combined markers range between 0.30-0.75 indicating a narrow range of genetic similarity among the accessions. Results from cluster analyses suggested that N. x hookeriana was indeed a hybrid between N. ampullaria and N. Rafflesiana, however it was genetically more similar to N. raflessiana.
Investigation of the Surface Morphology and Structural Characterization of Palm Fiber Reinforced Acrylonitrile Butadiene Styrene (PF-ABS) Composites  [PDF]
Budrun Neher, Md. Abdul Gafur, Muhammad Abdullah Al-Mansur, Md. Mahbubur Rahman Bhuiyan, Md. Rakibul Qadir, Farid Ahmed
Materials Sciences and Applications (MSA) , 2014, DOI: 10.4236/msa.2014.56043

With the aid of Injection Moulding Machine (IMM) Palm fiber reinforced Acrylonitrile Butadiene Styrene (ABS) composites (PF-ABS) were prepared. Three sets of samples were prepared for three different wt% (5%, 10% and 20%) of fiber contents. Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) experiments were performed to study the surface morphology, microstructure (if it crystalline or noncrystalline) and new bond formation after preparation of the composites. SEM pattern shows that after addition of palm fiber in PF-ABS composites the brittleness increased due to creation of voids in the composites except 10% fiber content in PF-ABS. From XRD pattern it is clear that the palm fiber, ABS and PF-ABS composites are amorphous in nature. Moreover FTIR spectrum shows that there is no new bond formed after addition of palm fiber in ABS polymeric matrix to create PF-ABS composites.

Isolation of Bulk Amount of Piperine as Active Pharmaceutical Ingredient (API) from Black Pepper and White Pepper (Piper nigrum L.)  [PDF]
Zihan Rahman Khan, Fatema Moni, Suriya Sharmin, Muhammad Abdullah Al-Mansur, Abdul Gafur, Obaidur Rahman, Farhana Afroz
Pharmacology & Pharmacy (PP) , 2017, DOI: 10.4236/pp.2017.87018
In the pharmaceutical world the majority of the active pharmaceutical ingredients (API) have been obtained from the natural products. Piperine is such naturally occurring alkaloid which can be considered as major bioactive phytochemical having broad spectrum of pharmacological activities. It is obtained from the most valuable ethnomedicinal spices peppercorns i.e. black pepper and white pepper, which are the fruits of the Asian vine Piper nigrum L. Because of the widespread traditional uses of this medicinal compound, present article reveals a simple and effective isolation method of bulk piperine. The novelty of this investigation is to provide an idea for utilizing such natural method of large scale commercial piperine production as API drug in spite of chemical synthesis. Piperine was isolated in a pure crystal form and characterized by its melting point, X-Ray diffraction (XRD) studies and spectral data, including two-dimensional nuclear magnetic resonance (2D-NMR) spectroscopy. Chromatographic techniques like Thin Layer Chromatography (TLC) and High Performance Liquid Chromatography (HPLC) were applied to determine the purity of the yielded piperine. It was found that piperine yield from black pepper was within 2.5% - 3.0% and from white pepper within 4.0% - 4.5% and the purity of the yielded piperine was found to be up to 98.5% for black pepper and 98.2% for white pepper. Considering this yield value and purity it is indicated that, such effective isolation method can be successfully utilized for industrial large-scale production commercially. According to the result, it can be claimed that, as a natural product the isolated piperine can also be utilized as API drug like other expensive chemically synthesized piperine in different drug formulation.
Manifestatation of Hetetrosis in Bread Wheat under Irrigated and Drought Stress Conditions
Ghulam Mahboob Subhani,Muhammad Aslam Chowdhry,Syed Mansur Mohsin Gilani
Pakistan Journal of Biological Sciences , 2000,
Abstract: Six high yielding and rust resistant bread wheat parents were crossed in a diallel fashion to get all possible combinations (30 crosses). Heterosis and heterobeltiosis analysis was performed for morpho-physiological traits like, stomatal frequency, leaf venation, flag leaf area, specific flag leaf weight, days to heading, tillers per plant, plant height, spike length, grains per spike, 1000-grain weight, biomass per plant and grain yield per plant under irrigated and drought stress conditions. Significant mid and better parent heterosis values were observed in certain single crosses for all traits under both environments. The maximum heterosis of 36.39, 15.17 and 12.54 per cent was noted for grain yield per plant, tillers per plant and spike length, respectively, in cross LU26S X Roh.90 under irrigated conditions, whereas cross combination Inq.91 X 4072 manifested maximum heterosis and heterobeltiosis for 1000-grain weight under irrigated and drought stress conditions. The presence of heterosis suggests that high yielding wheat hybrids can be developed.
Estimates of Genetic Variability Parameters and Regression Analysis in Bread Wheat under Irrigated and Drought Stress Conditions
Ghulam Mahboob Subhani,Muhammad Aslam Chowdhry,Syed Mansur Mohsin Gilani
Pakistan Journal of Biological Sciences , 2000,
Abstract: Thirty-six genotypes of bread wheat (Triticum aestivum L.) were evaluated for genetic variability parameters and regression analysis under irrigated and drought stress conditions. Tillers per plant, peduncle length, 1000-grain weight, grain weight of mother shoot, biomass per plant and grain yield per plant exhibited high genotypic coefficient of variability under both environments. Grain yield per plant suffered a maximum reduction of 68 per cent followed by 58.9, 57.4, 42.7, 41.5 and 27.4 per cent for biomass per plant, flag leaf area, tillers per plant, grain weight of mother shoot and plant height under drought stress conditions compared to irrigated conditions, respectively. High heritability estimates 90.08, 85.01, 83.32, 76.01, 74.86 and 72.23 per cent were found for 1000-grain weight, days to heading, peduncle length, spike length, plant height and spikelets per spike, respectively under irrigated conditions. High values of heritability were shown for days to heading, 1000-grain weight and spike length under drought stress conditions. Regression analysis indicated the importance of biomass per plant, harvest index and tillers per plant in influencing grain yield per plant in bread wheat. The plant height is more important than grain weight of mother shoot in case of drought stress conditions for the contribution of grain yield per plant.
Tracing children with blindness and visual impairment using the key informant survey in a district of north-western Nigeria
Muhammad Nasiru,Maishanu Nuhu,Jabo Aliyu,Rabiu Mansur
Middle East African Journal of Ophthalmology , 2010,
Abstract: Purpose: To identify children with irreversible blindness in a district of northern Nigeria for enrolment into an inclusive education pilot project. Materials and Methods: Using key informants (KIs) working and residing within the communities, children with blindness and visual impairment in Gwadabawa local government area (LGA) were identified and then examined by a team of ophthalmologists/optometrists. Data analysis was performed manually using simple percentages and proportions. Results: Sixty children were reported with visual problems by parents/guardians of whom 58 (97%) were examined. Twenty children (35%) were blind, 17 (29%) were irreversibly blind, and 9 (16%) had low vision (<6/18 to 3/60) with presenting vision. The major causes of childhood blindness were corneal opacity/phthisis bulbi (75%), and cataract (15%). The cause of irreversible blindness in these children was largely preventable (80%) as it was due to childhood-related illnesses, such as vitamin A deficiency and measles. Conclusions: The major causes of childhood blindness in the study area were avoidable and the use of KI survey in this study provided an opportunity for service delivery.
Performance of Heat Pipe Utilized for Atmospheric Air Heating  [PDF]
Mohammed Mansur
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.38125

The objective of the present experimental work is to investigate the performance of a wrapped screen heat pipe for atmospheric air heating to compare with the limits of this pipe. The experiment was conducted using copper pipe material and acetone as working fluid at different vapor temperatures. The testing also consists of a heater, a blower for heat removal (condenser), temperature measuring device, a vapor temperature probe, acetone charging system, and a vacuum pump. The copper outside diameterof the pipe is 0.022 m, with a total length of 0.6 m. The results showed that the pipe wall temperature (Tw) for a wrapped screen heat pipe has a rapid increase and takes 50 min to reach steady state at (Q = 63 W). The vapour temperature of working fluid increases as the heat load increases at constant air velocity. It was also been found that the range of vapour temperature deceases as the filling ratio increases that means the increasing of the filling ratio results the decrease of the maximum vapour temperature and the variation in the vapour temperature. The best recorded filling ratio is 0.6 which has the lowest vapour temperature at highest heat load. The maximum heat transport limit for this pipe is 80 W and the maximum temperature difference for air is 5C.

Genetic Control of Some Yield Attributes in Bread Wheat
Muhammad Aslam Chowdhry,Mohsin Ali Chaudhry,Syed Mansur Mohsin Gilani,Muhammad Ahsan
Pakistan Journal of Biological Sciences , 2001,
Abstract: Five wheat varieties/lines viz., Shahkar-95, Chakwal-86, Fsd-85, Rawal-87 and Pasban-90 were crossed in a diallel fashion to determine the genetic mechanism controlling yield and its components. Spike length, number of spikelet per spike, 1000-grain weight and grain yield per plant were governed by over dominance type of gene action. Number of tillers per plant and number of grains per spike were controlled by additive type of gene action with partial dominance. Epistasis was absent for all the traits studied
Secondary Metabolites from Jatropha Podagrica Hook
Nowshin N. Rumzhum,Md. Hossain Sohrab,Muhammad Abdullah Al-Mansur,Mohammad S. Rahman
Journal of Physical Science , 2012,
Abstract: The stem bark of Jatropha podagrica Hook (Family - Euphorbiaceae) was subjected to a thorough phytochemical investigation. Repeated chromatographic separation and purification of the crude methanol extract of this bark provided six compounds: fraxidin (1), fraxetin (2), scoparone (3), 3-acetylaleuritolic acid (4), β- sitosterol (5) and sitosterone (6). The structures of the isolated compounds were determined by spectroscopic analysis, most notably 2D NMR techniques, and by comparison of their spectral data with previously reported values.
Brazil World Cup Challenges
Salesian Journal on Information Systems , 2012,
Abstract: Overcoming the productivity challenge is the main benefit of the 2014 World Cup for Brazilian people. The sustainable development of our cultural tourism industry will catapult the new middle class growing up rate.
Page 1 /7369
Display every page Item

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