1. Co-culture of bovine embryos from oocytes matured and fertilized in vitro to the blastocyst stage with oviductal tissue
YINDEE KITIYANANT, CHAROENSRI THONABULSOMBAT, CHAINARONG TOCHARUS, BOONYAWAT SANITWONGSE AND KANOK PAVASUTHIPAISIT

2. Devewpment of, and seasonal changes in, the reproductive system of achatina fulica
UDOMSRI NGOWSIRI, PRAPEE SERTARUGSA, PRASERT SOBHON, MALEEYA KRUATRACHUE, JITTIPAN CHAVADEJ AND E. SUCHART UPATHAM

3. Echinoparyphium oscitansi n.sp. (trematoda echinostomatidae) natural infection in asian open-billed storks (anasidmus oscitans, aves ciconiidae) in thailand
PILAI POONSWAD AND PRADON CHATIKAVANIJ

4. Parameter-space classification of the dynamic behavior of the chemostat subject to product inhibition
Y. LENBURY, S. ROONGRUANGSORAKARN AND N. TUMRASVIN

5. Priorities for biodiversity research
WARREN Y. BROCKELMAN

6. Seedlings of laxmannia gracilis r.br. (anthericaceae) forms and evolutionary value
A.THONGPUKDEE

7. The presence of dimethylnitrosamine in fermented fishes and its mutagenicity
PRASONG KOONANUWATCHAIDET AND CHAILAI SRISUWAN