Arts for All School Arts Survey: Measuring Quality, Access and Equity in Arts Education

As part of its goal to make quality, sequential arts education a reality in all public K-12 classrooms in Los Angeles County, Arts for All connects school districts with effective tools and resources to improve arts learning. The Arts for All School Arts Survey: Measuring Quality, Access and Equity in Arts Education is the most recent of these tools to be introduced. It was developed to measure access to and quality of arts instruction at the school site level as well as to develop a system for collecting and reporting the data. The results are useful to schools and school districts to find out what is working, what's not working, and to point the way toward improvement. But the results can also provide a picture of what's happening across a region. The following summary describes how the survey was built and its first test in five school districts encompassing 100 schools. As a result of this test, some refinements will be made in the survey, but the survey's strength and utility have been proven. Los Angeles County now has a means of objectively measuring quality and access to arts education and making the results easily accessible

Modelling of Indicator Escherichia coli Contamination in Sentinel Oysters and Estuarine Water.

This study was performed to improve the ability to predict the concentrations of Escherichia coli in oyster meat and estuarine waters by using environmental parameters, and microbiological and heavy metal contamination from shellfish growing area in southern Thailand. Oyster meat (n = 144) and estuarine waters (n = 96) were tested for microbiological and heavy metal contamination from March 2016 to February 2017. Prevalence and mean concentrations of E. coli were 93.1% and 4.6 × 103 most probable number (MPN)/g in oyster meat, and 78.1% and 2.2 × 102 MPN/100 mL in estuarine water. Average 7-day precipitation, ambient air temperature, and the presence of Salmonella were associated with the concentrations of E. coli in oyster meat (p < 0.05). Raw data (MPN/g of oyster meat and MPN/100 mL of estuarine water) and log-transformed data (logMPN/g of oyster meat and logMPN/100 mL of estuarine water) of E. coli concentrations were examined within two contrasting regression models. However, the more valid predictions were conducted using non-log transformed values. These findings indicate that non-log transformed data can be used for building more accurate statistical models in microbiological food safety, and that significant environmental parameters can be used as a part of a rapid warning system to predict levels of E. coli before harvesting oysters

Mandibular Dentition in Six Species of Salamanders, genus Plethodon (Caudata: Plethontidae), from Arkansas Using Scanning Electron Microscopy

The mandibular (dentary) dentition of six species of Plethodon (P. caddoensis, P. dorsalis, P. fourchensis, P. glutinosus, P. ouachitae, and P. serratus) from Arkansas was studied using scanning electron microscopy. In all species, the mandibular teeth were bicuspid, and each tooth possessed a prominent labial cusp and a well-developed, inward-curving lingual cusp. All species showed similar tooth crown features, except P. caddoensis which exhibited a reduced tooth height and a reduced lingual cusp (only slightly larger than the labial cusp). We compared our data with other studies on premaxillary, maxillary, and palatal teeth in Plethodon and found overall similarities in tooth types. Tooth morphology does not appear to be an effective tool for taxonomic purposes in our Plethodon species because of the range of morphological variation in tooth structure

Assessment of Bacterial Accumulation and Environmental Factors in Sentinel Oysters and Estuarine Water Quality from the Phang Nga Estuary Area in Thailand.

This study characterized microbiological and chemical contamination of oyster meat and estuarine water in Phang Nga, Thailand. Pooled oyster meats (n = 144), estuarine waters (n = 96) and environmental parameters were collected from March, 2016 to February, 2017, and assessed for levels of total coliforms (TC), fecal coliforms (FC), Escherichia coli (EC), and Vibrio parahaemolyticus (VP), presence of Salmonella and Shigella and levels of heavy metals (Mn, Pb and Cd). The prevalence of TC, FC and EC were in 99.3%, 94.4% and 93.1% of oyster meat and 94.8%, 79.2%, and 78.1% of water, respectively. The average VP levels was 8.5 × 10⁷ most probable number (MPN)/g oyster. Prevalence of Shigella and Salmonella in the pooled oysters were 7.6% and 30.6%, respectively. The dominant Salmonella serovars were Paratyphi B followed by Seremban, and Kentucky. In contrast, the prevalence of Shigella were 27.1%, but Salmonella was not detected in estuarine water. Factors statistically associated with EC accumulation in oyster were level of FC, 7-day average precipitation, temperature, relative humidity, and presence of Salmonella in the sample. The optimal cutoff value of EC to predict Salmonella in oyster was 420 MPN/g. Results indicate this area has relatively safe levels of heavy metals, whereas bacterial contamination was very high for oysters

Evaluation of Water and Nitrogen Management Practices in Southern Us Rice (Oryza Sativa L.) Production

Nitrogen (N) fertility and irrigation costs are the greatest input expenses required for rice production in Mississippi, therefore N management and irrigation should be conducted in efficiently. Field experiments were conducted at the Delta Research and Extension Center in Stoneville, MS, and the LSU AgCenter in Crowley, LA, to evaluate water and nitrogen management practices. Nitrogen use efficiency and yield were not different for alternate wetting and drying (AWD) systems compared to a traditional continuous flood. Additionally, experiments were conducted to test for differences comparing two experimental designs, randomized complete block (RCB) and split-plot (SP), for N-rate response trials in Mississippi. Rice grain yield response to N-rate was similar for RCB and SP designs, therefore either experimental design would be appropriate for N-response experiments in rice. Increasing efficiency of water and N management practices further improves environmental and economic benefits from rice production in Mississippi

Evaluating the Osteogenic Potential of Raspberry Ketone and Simvastatin Dual-Loaded Electrospun Chitosan Membranes on Preosteoblasts

This study evaluated the osteogenic potential of dual-loading raspberry ketone (RK) and simvastatin (SMV) onto electrospun chitosan membranes (ESCMs) to impart bioactivity onto guided bone regeneration (GBR) membranes and give them a more active role in osteodifferentiation. In this study, W-20-17 cells in media exposed to 12-100µg/ml RK in combination with 75-150ng/ml SMV resulted in increased basal alkaline phosphatase (ALP) expression, whereas RK groups alone had no effect on ALP expression. Additionally, there was a dose-dependent combinatory cytotoxic effect in which SMV in combination with increasing concentrations of RK resulted in decreased viability and vice versa. RK+SMV combinations were loaded onto hexanoic anhydride modified ESCMs and evaluated for cytotoxicity and osteogenic potential. The RK dose used had minimal effect on viability, whereas the higher SMV dose had significant cytotoxic effects even with daily media change. The RK+SMV ESCMs did not have a positive effect on osteodifferentiation, and combinations with higher SMV loading inhibited osteodifferentiation ALP and calcium expression below basal level. It is speculated that RK has minimal effect on preosteoblast differentiation, and that it may have positive effects on less differentiated cell types. Additionally, it is possible the SMV elution kinetics when combined with RK resulted in exposure to higher SMV concentrations. With some modification of RK+SMV combination concentrations and better understanding of the specific mechanistic effects of RK, RK+SMV dual loaded ESCMs may have potential to be used in GBR applications