Biomedical subjects

B A Weiner

Publications and source records attributed to B A Weiner.

2 recordsLinked to original sources

PubMed1991

Comparative study of computer-based and standard clinical accommodative facility testing methods.

Two methods for assessing accommodative facility were compared: the Computer Orthoptics Diagnostic Program and the standard Lens Flipper Method. In random fashion, 40 visually normal [modified clinical technique (MCT) screening] subjects, ages 10 to 18 years, were tested monocularly and binocularly on both methods. Scatter-plot comparisons of the data showed no apparent relation between the two methods, with correlation coefficients close to zero for both monocular (r = 0.0205) and binocular (r = 0.1180) results. In addition, the subject's diagnostic classification (pass or fail) was compared between the two methods. The kappa statistic indicated a low level of agreement between the two methods both monocularly and binocularly. These results suggest that the Computer Orthoptics' diagnostic test is not a valid method for diagnosing accommodative facility deficiencies.

Accommodation, Ocular↗

PubMed1978

Isolation and partial characterization of the parasporal body of Bacillus popilliae.

The sporangial wall of Bacillus popilliae encloses a spore and parasporal body and is very resistant to breakage. High-energy sonication can disrupt this envelope and release free spores and parasporal bodies which retain refractility. Parasporal bodies, free spores, and sporangial debris were separated by centrifugation in linear sucrose gradients. Purified parasporal bodies are proteinaceous. Of the 17 amino acids detected, glutamic and aspartic acids are highest in concentration and account for the low isoelectric point of 4.5; a lipid moiety was not found. Parasporal bodies are soluble in 0.1N NaOH, 8M guanidine hydrochloride, 8M urea, or alkaline thioglycollate. Paper electrophoresis at 3000 V separated soluble parasporal protein into three cathodic components. Solubilized or whole intact parasporal bodies fed to third-instar larvae of the Japanese beetle were not detectable toxic. However, solubilized parasporal protein was twice as toxic as the intact parasporal bodies when injected into the hemocoel.

Bacillus↗