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The Florida Entomologist, 1995
A BSTRACT Different staining procedures were evaluated for their time requirements and effectiven... more A BSTRACT Different staining procedures were evaluated for their time requirements and effectiveness to differentially stain Liriomyza trifolii (Burgess)(Diptera: Agromyzidae) eggs and wounds (i.e., stipples) made by the female flies ovipositing within cos lettuce (Lactuca sativa L.) leaves. The best method for staining eggs within leaves was a lactophenol acid fuchsin solution that cleared the leaves of chlorophyll and stained the eggs pink to dark red. Modification of this established procedure reduced the total staining time to 7 min per leaf. Stipples were counterstained blue by immersing the leaves in a lactophenol cotton blue solution for 1 min immediately following the egg staining procedure. Larvae were not stained by either procedure. A new technique was devised for highlighting stipples using solutions of silver nitrate, sodium carbonate, formaldehyde and citric acid. The procedure resulted in blackened stipples that
Communications in Soil Science and Plant Analysis, 2001
Soil testing for silicon (Si) in the predominantly organic soils of the Everglades Agricultural A... more Soil testing for silicon (Si) in the predominantly organic soils of the Everglades Agricultural Area has not been sufficiently investigated. The objective of this study was to identify a suitable Si extraction method for these soils for rice (Oryza saliva L.). Twenty-two surface soil ...
Journal of Chemical Education, 2004
This article outlines a structured investigative activity for students in lower secondary school.... more This article outlines a structured investigative activity for students in lower secondary school. It was developed for the Australian Mathematics and Science Partnership Programme, a government initiative intended to promote the employment of more hands-on investigations in secondary science within Australian schools. The investigation focuses on water purification and is intended to develop conceptual knowledge of this topic and also high-level skills such as experimental design, particularly in relation to identifying and controlling variables. The investigation is outlined in detail and was trialed with practicing science teachers, school students and preservice secondary teachers. All of these groups provided feedback in various forms that indicated the investigation was valuable, relevant, interesting and allowed students to take some responsibility for their own inquiry learning.
The Florida Entomologist, 1995
A BSTRACT Different staining procedures were evaluated for their time requirements and effectiven... more A BSTRACT Different staining procedures were evaluated for their time requirements and effectiveness to differentially stain Liriomyza trifolii (Burgess)(Diptera: Agromyzidae) eggs and wounds (i.e., stipples) made by the female flies ovipositing within cos lettuce (Lactuca sativa L.) leaves. The best method for staining eggs within leaves was a lactophenol acid fuchsin solution that cleared the leaves of chlorophyll and stained the eggs pink to dark red. Modification of this established procedure reduced the total staining time to 7 min per leaf. Stipples were counterstained blue by immersing the leaves in a lactophenol cotton blue solution for 1 min immediately following the egg staining procedure. Larvae were not stained by either procedure. A new technique was devised for highlighting stipples using solutions of silver nitrate, sodium carbonate, formaldehyde and citric acid. The procedure resulted in blackened stipples that
Communications in Soil Science and Plant Analysis, 2001
Soil testing for silicon (Si) in the predominantly organic soils of the Everglades Agricultural A... more Soil testing for silicon (Si) in the predominantly organic soils of the Everglades Agricultural Area has not been sufficiently investigated. The objective of this study was to identify a suitable Si extraction method for these soils for rice (Oryza saliva L.). Twenty-two surface soil ...
Journal of Chemical Education, 2004
This article outlines a structured investigative activity for students in lower secondary school.... more This article outlines a structured investigative activity for students in lower secondary school. It was developed for the Australian Mathematics and Science Partnership Programme, a government initiative intended to promote the employment of more hands-on investigations in secondary science within Australian schools. The investigation focuses on water purification and is intended to develop conceptual knowledge of this topic and also high-level skills such as experimental design, particularly in relation to identifying and controlling variables. The investigation is outlined in detail and was trialed with practicing science teachers, school students and preservice secondary teachers. All of these groups provided feedback in various forms that indicated the investigation was valuable, relevant, interesting and allowed students to take some responsibility for their own inquiry learning.