Production of biomaterials from seafood waste for application as vegetable wash disinfectant.

The production of seafood waste was studied by analyzing calcium oxide from the shells of tropical oyster and chitosan from the shells of white shrimp to use as a vegetable wash disinfectant. The preparations used were: natural oyster shell powder (NOSP), calcined tropical oyster shell powder in a programmable furnace for 2 h at 700 °C (OSP), 800 °C (OSP) and 900 °C (OSP) including white shrimp shell chitosan (CS). The physical properties of all biomaterials were analyzed using Thermogravimetric analysis, X-ray diffraction and Fourier-transformed infrared spectrometry.

Conjugation in Escherichia coli: A laboratory exercise.

Bacterial conjugation is a genetic transfer that involves cell-to-cell between donor and recipient cells. With the current method used to teach students in genetic courses at the undergraduate level, the transconjugants are identified using bacterial physiology and/or antibiotic resistance. Using physiology, however, is difficult for both first-year undergraduates and special science students at the high school levels, who do not have the basic knowledge.

Improving Thai students' understanding of concepts in protein purification by using Thai and English versions of a simulation program*.

To support student learning in biochemistry and related courses, a simulation program, the Protein Purification Program, offers an alternative multimedia-based tool. This program has now been translated to produce a Thai version. However, translation from the original into the Thai language is limited by the differences between the language characteristics of English and Thai.

Streptomycin production by Streptomyces griseus can be modulated by a mechanism not associated with change in the adpA component of the A-factor cascade.

In Streptomyces coelicolor, AtrA is an activator of transcription of the actinorhodin cluster-situated regulator gene actII-ORF4. In previous work, we showed that S. coelicolor AtrA binds in vitro to the promoter of S.