Contents

• Editorial

Regular Papers

• Karyomorphological Study of Some Selected Cycads
  Nitsri Sangduen, Mathanee Toahsakul and Vipa Hongtrakul
• Bit Error Period Determination and Optimal Frame Length Prediction for a Noisy Communication Channel
  Georgi Atanasov Naydenov and Petko Stoyanov Stoyanov
• Effect of Coiled Capillary Tube Pitch on Vapour Compression Refrigeration System Performance
  Mutalubi Aremu Akintunde
• Effect of a Konjac Flour / Soy Protein Isolate Mixture on Reduced-fat, Added Water Chiffon Cakes
  Adisak Akesowan
• Determination of Length of Growing Season in Samaru Using Different Potential Evapotranspiration Models
  Rita Ngozi.Edoga

Review Article

• Zeolites - Earliest Solid State Acids
  David Tin Win

Technical Reports

• The Case Study of 5 kHz – 25 kHz High Frequency Adjustment in Converter Circuit to Generate Ozone Gas
  Siseerot Ketkaew
• Development of Electronic Hygrometer System
  Abubakar Saddiq Mohammed and Abdullahi Mahmud

Letters

• Practical Limitations of Break-Even Theory
  Mohammed B. Ndaliman and Katsina C. Bala
• Development of an Apparatus for Measuring Angle of Repose of Granular Materials
  Ogbonnaya Chukwu and Fatai Bukola Akande

How to Write Analytical Expressions and Equations