EVALUATION OF AN INEXPENSIVE CD4 CELL COUNTING TECHNIQUE

Inexpensive CD4 counting for the developing world.

An inexpensive feeding bioassay technique for stored-product insects.

ABSTRACT We used the red flour beetle, Tribolium castaneum Herbst (Coleoptera: Tenebrionidae), to compare three feeding bioassay techniques using flour disks. The area (scanner or digital photographs) and mass (sensitive balance) of the same flour disks were measured daily for 1 or 2 wk to assess feeding by insects. The loss in mass and area over 4 h was measured, as some variation over time wa...

an investigation into iranian teachers consistency and bias in evaluation of students writings

while performance-based language assessment has led to an increased authenticity and content validity in the practice of writing assessment, the reliability of ratings has become a major issue. research findings have shown different reactions by native english speaker (nes) and non-native english speaker (nns) teachers to students’ writings. the focus of this study is on investigating whether i...

Evaluation of stabilized blood cell products as candidate preparations for quality assessment programs for CD4 T-cell counting.

BACKGROUND Exceptionally robust cell preparations are needed for quality assessment programs (QAPs) such as the International Program for Quality Assessment and Standardization for Immunological Measures (QASI) relevant to HIV/AIDS. A suitable product must withstand environmental stress related to transportation for a minimum of 6 days. The two objectives of this study are (1) to evaluate the p...

Quantitative assay of interferon by the immunofluorescent cell-counting technique.

A rapid, quantitative assay of interferon was developed, based on the reduction of the number of virus-infected cells by dilutions of interferon. Infected cells were enumerated by fluorescent cell-counting 24 hours after challenge of interferontreated McCoy cover-slip cell monolayers. A quantitative linear relationship between the reduction of fluorescent cells and dilutions of interferon was d...