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K^łeksi Malaysiana

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A Journal of Biological, Physical and Social Sciences

Number 3, December 1991

Contents

Section I: Biological Sciences

Productivity of Homogeneous and Heterogeneous Oat Populations at Two Sowing Dates - Nańmah Md. Kaimdin Changes in Moisture Content of Com Starch during Pneumatic Conveying - Asbi B. Ali and J. Uimb    229

A Survey of Microbiological Quality of Fish .Sold in Two Lx>cal Wel Markets - G. Rusul, Mohamed Mahyuddin Dahan 237 and Mustaffa Dollah    243

Prevalencc of IJstnia monocytogenes in Relail Beef and Poultry - Ghulam Rusul Rahmal, Aziah Ibrahtm and Fatimah

Mm Bętkar    249

Laboratory Studies on the Release of Cations and Anions in Acid Sulfate Soils from Pulau Lumut, Sclangor -

J. Shamsuddin and Edgardo A.    Auxtero    257

Fifect of Tracked and Rubber-Tyred l.ogging Machines on Soil Physica) Properiies of thc Berkelah Forest

Reserve, Malaysia - Kamaruiaman Jusoff    265

Communication

EfFects of Host Fruii and.l*arval Den sity on Development and Survival of Bactrocera sp. (Malaysian B.) (Diptera:

Tephriiidae). - Chua Tock Hing    277

Bioniass Production and Biomass Relationship of Young CaUicarpa pentandru - Lim Meng Tsai    281

Ground Water-Bottom Soil-Water Interaciions in Tropical Carp Nursery Ponds - M. Ahsan Inn Habib, M. Ja hangi r

A lam, L. Rahman Khan and Morntaz Begum    287

Section II: Physical Sciences

4

Flavonoid Glycosides from the Pinnac of Lunathyńum japomcum - Y. Umikalsom and JB. Harbome    293

Flavonoid Distribulion in Asplenioid Ferns - Y. Umikalsom and J.B. Harbome    297

The Distribution of Service Time at Bangi, Kajang, Sungai Bęsi and l^rniversiti Pertanian Malaysia Closed System

Toll Plazas - Radni Umar Bin Radin Sohadi Habsah bt. Midi and Muhammad Salih Haji Jaajar    301

Computing Dispersion CocfFicient of Model Waste Stabili/ation Ponds - IIoch Lye Koli and Rob Eng Lim    311

A Simple Approach to Ascertain the Magnitudes of the Coeflicicnts of 2 p-Atomic Orbitals in Fach 7T - Electron

Molecular Orbital of the Linear Polyenes or Polyenyl Systems - Mohammad Niyaz Khan    317

Masalah Pelajar dałam Menamakan Sebatian-Sebatian Organik Berpolifungsi - Rehan Bt. Haji Mohd Nor    323

The Group F.xplicit Methods for Parabolic Problems with Cylindrical and Spherical Symmetry - MohdSalleh Sahimi 331 and David J. Eitans

Communication

Effect of Milling Time on the Microstructure of YBa, Cu., O, - A. Halim Shaań, M. Hashim, J. Suradi, M. Yahya 347 and M.N. I)ali mm

Dicentrinc: the Major Alkaloid of Gyclea laxiflora Miers. - Nordin Hj. Lajis, Zainudin Sarnadi and Norhayati Ismail 353

Phacanthine and Limacine from Phaeanthus crassipetalus Bece. - Fasihuddin B.A. Shanty, V and Alan M.S.    355

A Subroutinc Package for Solving Hydrodynamic Lubrication Problems - Shahnor Baśń    359

Section III: Social Sciences

Returns to Bidding and Target Firms in Hostile Takeovers: Somc L-K Evidence - Shamsher Mohamad and Annuar 373 Md. Nasstr

A Model tor the Rice and Wheat Economy in Malaysia: An Empirical Assessment of AJtemative Specificauons -

Ahmad Z.ubaidi Bahammshah    383

A Motał Approach to Risk Management Strategies for Vegetable Producers in Malaysia - Zamal Abidin Mohamed

and Ahmad Zubaidi Baharumshah    393