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Too many middle school students struggle to comprehend their textbooks in science and other content areas. Thus, many adolescent learners lag behind in developing scientific literacy, which the National Research Council has defined as sufficient understanding of the scientific concepts and processes required for personal decision making, participation in civic life, and economic productivity. With these concerns in mind, professors and doctoral students from the University of Florida at Gainesville collaborated with two middle school teachers in the 2004-05 academic year to integrate reading instruction and a wide range of science readings into these teachers' 6th grade science classrooms. Their action research team provided students with explicit instruction in reading strategies, exposure to award-winning science books and related activities, and professional development focused on building teachers' comfort with integrating reading into science. End-of-year test results showed that students who received this intervention achieved higher scores in both science and reading than did students whose teachers didn't participate.

Momentary time samples (MTS) of 2, 4, and 6 minutes were compared to continuous recording samples of on-task behavior for three elementary-aged students with emotional/behavioral orders (EBD). Results indicated that the 2-minute, but not the 4- or 6-minute, interval MTS were consistent with the continuous measure. Implications for research and classroom use of MTS are drawn. (Contains references.) (Author/DB)

Students need to read more science texts and develop strategies for learning from these texts in order to become scientifically literate, but content-area teachers tend to focus more on covering content than on teaching students how to learn from texts. An account of how professors and doctoral students in the College of Education at the University of Florida in Gainesville initiated a research project aimed at helping science teachers infuse reading comprehension strategy instruction into the classroom, is presented.

Summary: The objective of this study is to compare aneuploidy rates between three distinct areas of the human trophectoderm: mural, polar and a region in between these two locations termed the 'mid' trophectoderm. This is a cohort study on in vitro fertilization (IVF) patients undergoing comprehensive chromosome screening at the blastocyst stage at a private IVF clinic. All embryos underwent assisted hatching on day 3 with blastocyst biopsy and comprehensive chromosome screening. Biopsied blastocysts were divided into three groups depending on which area (polar, mid, or mural) of the trophectoderm was protruding from the zona pellucida and biopsied. Aneuploidy rates were significantly higher with cells from the polar region of the trophectoderm (56.2%) compared with cells removed from the mural region of the trophectoderm (30.0%; P = 0.0243). A comparison of all three areas combined also showed a decreasing trend, but this did not reach clinical significance, polar (56.2%), mid (47.4%) and mural trophectoderm (30.0%; P = 0.1859). The non-concordance demonstrated between polar and mural trophectoderm can be attributed to biological occurrences including chromosomal mosaicism or procedural differences between embryologists. [ABSTRACT FROM AUTHOR]

Stimulated Fe(III) reduction in hog manure can rapidly remove the malodorous compounds and enhance methane production by 200%. The study showed that Fe(III) supplementation combined with appropriate bioaugmentation provides a simple, cost-effective approach to deodorize and treat swine waste, removing a significant impediment to the expansion of pork production facilities.

Characterizing the resilience of mammalian cells to non-physiological conditions is necessary to develop preservation and long-term storage strategies at low or ambient temperatures. Using the domestic cat model, the objective of the study was to characterize structural integrity (morphology and DNA damage) as well as functional properties (sperm aster formation and embryo formation after sperm injection) of spermatozoa after microwave-assisted drying to a moisture content compatible with storage in a glassy state at supra-zero temperatures. In Experiment 1, cat epididymal spermatozoa were porated with hemolysin and dried (using a commercial microwave oven set to 20% power) in the presence of trehalose for up to 50 min in a low humidity environment (11%) before measuring moisture content and sample temperature. In Experiment 2, morphology and DNA integrity were evaluated in sperm dried for up to 30 min (using the same method as above) versus fresh spermatozoa. In Experiment 3, the functionality of sperm dried for 30 min versus fresh sperm cells was evaluated after injection into oocytes based on sperm aster formation (5 h post-injection) and embryo development in vitro over 7 days. Moisture contents compatible with dry state storage were reached after 30 min of microwave-assisted drying. After rehydration, sperm morphology was not affected and the percentages of cells with damaged DNA (∼6.5%) was similar to the fresh controls. Sperm aster diameters appeared to be generally smaller for dried-rehydrated cells compared to the fresh controls. This observation was consistent with a lower proportion of blastocyst formation after injection with dried spermatozoa (6.5%) compared to fresh spermatozoa (15%). However, the blastocyst quality based on the total blastomere number was not affected by the sperm treatment. This is the first and encouraging report in any species so far demonstrating that spermatozoa can be dried using microwaves without causing irreversible damage to the cellular structure and function. [ABSTRACT FROM AUTHOR]