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Articles by M. Hanif
Total Records ( 8 ) for M. Hanif
  Aamir Shahzad , Hashim Farooq , Sofia Akba , Mushtaq Yousaf , Kamran Hafeez and M. Hanif
  The purpose of this study is to design a Programmable Logic Controller (PLC) to command 8-relays to control and automate ac loads via PC parallel port. In this project, the PLC is connected to the Personal Computer called hybrid PLC and this PC controls all the field ac loads via parallel printer port. Eight signals of different sequences are sent on parallel port via computer keyboard, which activate the microcontroller as inputs. Microcontroller responds according to these inputs and its user programming, which then commands 8-relays to control (on/off) different electronic appliances. Microcontroller memory makes easier to store its programming permanently. This hybrid PLC is applicable for controlling and monitoring industrial processes particularly of small to medium scale manufacturing processes and may be used for home automation as well. Parallel port is accessed by a program written in C++ language and microcontroller is programmed in assembly language. Ac load of any kind, whether resistive or inductive can be controlled with the help of this project.
  M. Hanif and M. S. Davies
  A 8 day exposure to NaCl reduced the length of root apical meristem in Secale cereale (cv. K2) to a greater extent than Triticum aestivum (cv. Chinese Spring). NaCl induced also root hair formation much closer to the root cap boundary than in the control roots. Contrasting cultivars were differentially sensitive by NaCl in respect of distance of the first root hair from the root cap boundary in root meristem and this may be used as a character for screening genotypes at the seedling stage for variability in NaCl tolerance.
  M. Hanif and M. S. Davies
  Seedings of Triticum aestivum cvs. Lyallpur-73, Pak-81 and Lu-26-S were grown in solution culture at varying concentration of NaCl for 8 days. Increasing concentrations of NaCl reduced the size of apical meristem and caused the most distal root hair to form closer to the root tip in all the cultivars. Although the position of the first root hair from the root cap boundary was reduced by salinity, yet there were comparatively little differences between these Pakistani Wheat cultivars in response to NaCl, thus in these studies the relative positions of root hairs is not a good discriminating character for assessing the salt tolerance.
  M. Hanif and M. S. Davies
  Eight day exposure to NaCI reduced the Mitotic indices in the root meristems of all the cultivars in aerated solution culture. There were large differences between the cuitivars in the control solutions. The relative frequency of prophase and metaphase in Mitotic cells decreased with increasing NaCI concentration while the relative frequency of anaphase and telophase increased. Mitotic index in the root meristem of Chinese spring was reduced to a greater extent than in K: cultivar.
  M. Hanif and M. S. Davies
  This study was to compare the relative salt tolerance of differentially salt-tolerant cultivars of wheat, rye and barley grown at varying concentrations of NaCl in solution culture during germination. Increasing concentration of NaCl (60-150 mM) reduced the percentage of seed germinating. The lines of Hordeum sativum were generally less sensitive to the NaCl-induced reduction in respect of the character than Triticum aestivum or Secale cereale. Germination is not a good discriminating character for salt tolerance in this study.
  M. Hanif and M. S. Davies
  The seedlings of Triticum aestivum cvs. Lyallpur 73 and Lu-26-S were grown in aerated 0.1 Rorison nutrient solution for 72 hours. Then the kinetics of cells cycle in the root meristem were determined by a pulse labelling experiment with low specific activity tritiated thymidine following a 70 hours exposures to three concentrations of NaCl (0, 30, 70 mM NaCl). Treatments with 30 and 70 mM NaCl increased the length of cell cycle in cv Lu-26-S but that of Lyallpur 73 was decreased. The growth fraction (refers to percentage of meristematic cells which are actively cycling as opposed to these that are not cycling in the meristem) was increased in Lyallpur 73 from 7.9 to 11.11% over the range of 0-70 mM NaCl whereas that of Lu-26-S was decreased in response to increasing NaCl concentration.
  M. Hanif and M. S. Davies
  The Pakistan wheat cultivars investigated exhibited different cell doubling times not only at the control but they also differed in response to increasing the NaCl concentration. The rates of metaphase accumulation of the cultivars were very slow and thus cell doubling times were very long. This may be a reflection of very slow mitotic activity in root meristems.
  M. Hanif and M. S. Davies
  The seeds of Hordeum sativum lines B-88079 and B-jou87 were grown in aerated 0.1 Rorison nutrient solution for 72 hours. Then the kinetics of cell cycle in the root meristem were determined by a pulse labelling experiment with low specific activity tritiated thymidine following a 70 hours exposures to three concentrations of NaCI (0, 50 and 100 mM NaCI). Hordeum sativum lines B-jou87 had a longer cell cycle duration than that of line B-88079. The mitotic cell cycle in line B-88079 remained unaffected at 50 and 100 mM NaCI concentrations but that of B-jou87 was decreased. The growth fraction (refers to percentage of meristematic cells which are actively cycling as opposed to these that are not cycling in the meristem) was not determined due to non labelling of any cells in continuos labelling experiment.
 
 
 
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