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Articles by Ijaz Ahmad
Total Records ( 6 ) for Ijaz Ahmad
  Rizwana Aleem Qureshi , Ijaz Ahmad and Muhammad Ishtiaq
  Tehsil Gujar Khan is a typical example of Potohar region characterized by the natural beauty and specific cultural heritage. Only one family represented Pteridophytes, Gymnosperms by three families and Angiosperms by 66 families (10 monocots and 56 dicots). About 271 plants were enlisted from the study area in which 206 species of plants (76.01%) are herbs, species are trees (16.60%) and about 20 species are shrubs (07.38%). As for as conservation status of plants species is concerned 8.12% are abundant, 4.65% common, 2.14% uncommon, .71 rare and 7.38% of species are very rare. The results of utilization of plants showed that some plants have multiple uses. Based on utility, there were 197 medicinal plants (72.69%), whereas 76 species (28.04%) served as fodder and forage for animals, 2 species (15.49%) were used as fuel wood, species (17.34%) served for attracting honey bees, 2 species (11.81%) were used as vegetables and pot herbs, species (12.91%) used for thatching, sheltering and roofing, 1 species (11.43%) were planted as ornamental, species (9.96%) used for making various agricultural appliances and ropes, 1 species (07.74%) were timber yielding, 0 species (7.38%) were used for fencing and hedges whereas 22 species (08.11%) each were serving for the Category of fruit yielding plants. Lastly 7 species (02.58%) were serving as a source of spices and condiments. The species within a stand were arranged on the basis of importance values and named after the three leading species with the highest importance value as dominant; the closely approaching species were considered as co-dominant and followed by associated and rare species on the basis of I.V. So following four communities were found namely, Acacia-Aristida -Gnaphalium community, Poa-Acacia-Cymbopogon Community, Inula-Tamarix-Chenopodium community and Acacia-Prosopis-Imperata Community.
  Chong Liu , Xiao-Quan Yang , Ijaz Ahmad , Chuan-He Tang , Lin Li , Jian-Hua Zhu and Jun-Ru Qi
  Steady shear and dynamic oscillatory measurements were used to investigate the effect of concentration, ionic strength and thermal treatment on rheological properties of soybean β-conglycinin in aqueous dispersions. SDS-PAGE and Differential Scanning Calorimetry (DSC) showed that β-conglycinin exhibited partial denaturation and formation of aggregates during isolation. Under steady shear flow, strong shear-thinning behavior was observed with increasing shear rate from 0.001 to 1200 s-1. A dispersion of β-conglycinin (≥5% w/v, without applying thermal treatment) exhibited gel-like dynamic mechanical spectra at 20°C. This suggested that β-conglycinin in aqueous dispersions showed rheological properties of typical weak gel-like (entanglement) or semi diluted polymeric solution. Weak gel network of β-conglycinin was susceptible to ionic strength, suggesting that electrostatic forces play an important role in the formation of weak gel network. These properties of β-conglycinin have practical significance for the food processors in the formulation of new products.
  Muhammad Ayyaz Khan , Ishtiaq Taj , Ijaz Ahmad and Muhammad Safdar Baloch
  Experiments were conducted to evaluate allelopathic influence of eucalyptus on the germination and seedling growth of cotton, sunflower, sorghum, mungbean and mothbean under the laboratory conditions. One kg of fresh leaves of eucalyptus was soaked in ten liter of water for 72 hours. This extract was used in seeds soaking prior to sowing in the pure sand culture. The same extract was applied to the germinated seeds in comparison with simple water application to the control treatments. The results revealed that application of aqueous extract of fresh leaves to seeds of all crops reduced the germination and suppressed the growth of roots and shoots of seedlings of crops belonging to different families.
  Samina Aslam , Naheed Abbas , Sajjad- ur-Rahman , Iftikhar Hussain , Uzma Tabbassum , Ijaz Ahmad and Sarfraz Hussain
  The main objective of the present study was to achieve the background knowledge for the preparation and packaging of chicken powder upto international standards. A part from chemical analysis the project was intended to estimate the shelf life of the prepared chicken powder. There was non significant change in nutritive value specially for protein, fat, calorific value and cholesterol contents. Only rancidity, moisture and ash contents were affected significantly with the passage of time.
  Qaisar Abbas , Ijaz Ahmad , Muhammad Asghar Shahid , Muhammad Faheem Akhtar , Mussurat Hussain , Muhammad Akram and Ali Raza
  A field study was carried out to determine the role of weather factors on canola aphids population. Aim of this study was to investigate, how meteorological factors play a role in fluctuating aphid population. The experiment was conducted on canola crop grown under three farming systems i.e., synthetic fertilizer, farm yard manure and untreated control. Aphid population was recorded from 1st week of February to 2nd week of March during 2009 and 2010 and weather data was collected from metrological observatory during the same period. The results revealed that a peak aphid population was recorded during the beginning of 2nd week of March in both years of the study. Aphid density was positively associated with maximum as well as minimum temperature while it showed a negative correlation with relative humidity. The rainfall during 2009 showed significant and negative correlation with aphid population while during 2nd year of studies (2010) it showed non significant correlation. On division of aphid infestation period into different phases of infestation, it was observed that during the establishment phase, the rainfall and relative humidity were negatively correlated, whereas, temperature was positively correlated while, during the declining phase temperature had negative relationship with aphid population build up.
  Hamid Iqbal , Muhammad Ishfaq , Muhammad Naseer Abbas , Ijaz Ahmad , Ali Rehman , Syed Badar Amin , Bibi Ibtesam Shagufta and Musarat Ullah
  Background and Objective: The present study was investigated to aim with the screening of selected medicinal plant to substantiate in vitro antimicrobial activity of methanolic extract of Tamarix aphylla bark against microbial strains and designed to provide scientific evidence for its use as a folk remedy in view of phytochemical constituents. Materials and Methods: Bacterial strains viz. Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Salmonella typhi and fungal strains including Aspergillus flavus and Candida albicans were tested using dilutions of 25, 50, 75 and 100 mg mL-1 of the stock solution prepared in dimethyl sulfoxide (DMSO) via disc diffusion assay. Inhibitory effect of extract in millimeters was determined by measuring the zone of growth inhibition surrounding the discs and compared with the standard drug. Results: Investigation revealed that extract of Tamarix aphylla bark was found to exhibit marked zone of inhibition at higher concentration in most of the bacterial and fungal strains examined. Conclusion: The present study suggests the presence of great potential of bioactive and phytochemical compounds rationalizing the use of this plant in primary health care.
 
 
 
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