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Articles by H. Khan
Total Records ( 3 ) for H. Khan
  Amir Zaman Khan , H. Khan , R. Khan , Adel Ghoneim and Azza Ebid
  The aim of present study were to characterize the pattern of seed development in precociously mature soybean seeds planted on different dates during its progression from germination to seedling growth and maturation and its effect on yield under temperate environment. Changes in seed quality (Viability and Germination) were monitored from developmental to maturation (growth stage R5 to R7) of soybean (Glycine max (L.) Merr.) in different planting dates. Information on the effect of planting date on seed fresh and dry weight, moisture content and germination of soybean is meager. A field experiment was conducted with four planting dates and two soybean cultivars to study the influence of planting dates on seed developmental traits for 2 years. Determinate cultivars (Epps, maturity group [MG] V) and indeterminate cultivar, Williams 82 [MG] 111) were planted on May 1st to August 1st at one month interval at the Agriculture Research Farm of the NWFP Agricultural University Peshawar, during 2000 and 2001. Seeds were harvested at 10-days interval from 35 to 75 days after anthesis (DAA) in all planting dates. Epps planted in early May gave maximum fresh, dry seed weight and moisture content. A steady decrease in fresh and dry weight and moisture content were observed with delay in sowing of soybean. An inverse relationship was noted in Williams 82 regarding fresh, dry weight and moisture content in all planting dates. Water per seed increased up to 100% DAA, after which no further increase occurred. Moisture content declined for the whole seed, respectively, from above 75 and 65% at 95 DAA to 65 and 50% at 140 DAA in both cultivars. Decrease in seed moisture content during development was accompanied by increase in desiccation tolerance and germination, reaching maximum at physiological maturity in both cultivars. Fresh and dry seed germination increased linearly in both varieties. Mean rate of change in germination was more pronounce in Epps as compared to Williams 82. Immature seeds in both cultivars during early developmental stage did not germinate in all planting dates.
  H. Khan , S. S. Lasker and T. A. Chowdhury

Aims  To determine the prevalence and reasons for refusal to commence insulin in Bangladeshi patients with Type 2 diabetes.

Methods  A survey of 212 Bangladeshi patients seen in a hospital diabetes unit, with poor glycaemic control (HbA1c≥ 8.0%) on maximum oral glucose-lowering therapy, in whom insulin was deemed necessary. Patients who refused insulin were invited to attend focus groups. Data were analysed by thematic content analysis using the constant comparative method.

Results  Of 212 patients offered insulin, 122 (57.5%) commenced insulin immediately, 47 (22.1%) started insulin within 6 months and 43 (20.3%) refused to commence insulin despite repeated counselling. Thirty-six (83.7%) of those who refused insulin agreed to participate in focus groups. Reasons for insulin refusal included: disease severity—perceptions that requirement for insulin was an indicator of a more serious stage of their condition; insulin leading to premature death—common suggestion that commencing insulin led to early death; loss of control—including fear of hypoglycaemia, weight gain, loss of independence and reliance on others to give insulin or look for signs of hypoglycaemia; lack of perception of benefits—poor perception of the benefits of improved glycaemic control on quality of life and cardiovascular risk; needle anxiety—a significant proportion of subjects conveyed concern over frequent injections.

Conclusions  Insulin refusal is common in Bangladeshi subjects with Type 2 diabetes and poor glycaemic control. A number of factors contribute to this, and methods to overcome the barriers to insulin therapy need to be sought.

  H. Khan , A.Z. Khan , R. Khan , N. Matsue and T. Henmi
  The objective of the present study was to quantify the effects of zeolite application and allophanic soil (KyP and KnP) on leaf area development, plant height and reproductive morphology of soybean. One determinate (Enrei [MG] 1V) and indeterminate cultivar (Harosoy [MG] 11) were planted in pots on April 20th at the Faculty of Agriculture, Ehime University, Matsuyama Japan during 2007. Zeolite levels of 0, 1 and 2 wt.% were used to determine the growth behavior of soybean cultivars grown on two allophanic (KyP and KnP) and a paddy soil. Zeolite application and allophanic soil significantly affected leaf area development, plant height and reproductive morphology of soybean cultivars. Maximum leaf area and plant height were obtained from 2 wt.% zeolite application and allophanic soil (KyP and KnP). Minimum number of days to flowering, pod formation, seed filling duration and physiological maturity were taken by 1 and 2 wt.% zeolite application in both cultivars. The same trend was observed in number of days to reproductive development by KyP and KnP allophanic soil. Enrei took maximum days to all reproductive stages as compared to Harosoy. Zeolite treated plots and allophanic soil (KyP and KnP) attained more plant height than control plots grown on paddy soil without zeolite application. Harosoy produced the tallest plants than Enrei. Present findings supported the results of experiments by demonstrating that zeolite application at planting time promotes leaf area, plant height and encourage the reproductive morphology of soybean cultivars grown on KyP and KnP allophanic soil.
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