Drug-Free School Zones

2010 ◽  
pp. 394-395
Author(s):  
Jose Mercado
Keyword(s):  
Free School ◽  
Drug Free ◽  
School Zones

Are Drug-Free School Zones Effective? Evidence From Matching Schools and School-like Entities

2021 ◽  
pp. 002204262110579
Author(s):  
Erica Freer ◽  
Quinn Keefer
Keyword(s):  
Los Angeles ◽  
Treatment Effects ◽  
Matching Model ◽  
Free School ◽  
Average Treatment ◽  
Related Drug ◽  
Average Treatment Effects ◽  
K 12 ◽  
Drug Free ◽  
School Zones

Using a combination of spatial and statistical analysis, this paper focuses on analyzing the effectiveness of drug-free school zones (DFSZ) around K-12 schools in Los Angeles County. A propensity score matching model is employed to match schools and school-like entities to compare the amount of drug crimes in two distinct 1000-foot buffers surrounding them. The model is then compared to a coarsened exact matching model. The average treatment effects (ATE) and average treatment effects on the treated (ATT) are estimated. Our results indicate that there are 2.7 and 1.7 fewer drug crimes and non–marijuana-related drug crimes respectively near schools, as a result of the policy. The total effect of the policy is estimated to reduce drug crime near schools by between 1065 to 1643 fewer incidences per year. Furthermore, we find no significant differences in gang-related drug crimes, gang-related violent crimes, or property crimes as a result of the policy.

Measuring school engagement for child welfare involved youth: Assessing the dimensionality of the Drug Free School Scale

2019 ◽  
Vol 92 ◽  
pp. 85-92 ◽  
Author(s):  
Jamie Cage ◽  
Susan Yoon ◽  
Sheila Barhart ◽  
Crystal Coles ◽  
Hollee A. McGinnis ◽  
...  
Keyword(s):  
Child Welfare ◽  
School Engagement ◽  
Free School ◽  
Drug Free

Gun-Free School Zones

2010 ◽  
pp. 489-491
Author(s):  
Teresa P Clark ◽  
John S Carlson
Keyword(s):  
Free School ◽  
School Zones

Effect of piperacillin on morphology and viability of gram-negative bacteria

1984 ◽  
Vol 42 ◽  
pp. 218-219
Author(s):  
R. H. Liss
Keyword(s):  
Inhibitory Concentration ◽  
Cytoplasmic Membrane ◽  
Drug Binding ◽  
Gram Negative Bacteria ◽  
Bacterial Cells ◽  
Drug Induced ◽  
Penicillin Binding Proteins ◽  
Lactam Antibiotic ◽  
Drug Free ◽  
Tube Dilution

Piperacillip (PIP) is b-[D(-)-α-(4-ethy1-2,3-dioxo-l-piperzinylcar-bonylamino)-α-phenylacetamido]-penicillanate. The broad spectrum semisynthetic β-lactam antibiotic is believed to effect bactericidal activity through its affinity for penicillin-binding proteins (PBPs), enzymes on the bacterial cytoplasmic membrane that control elongation and septation during cell growth and division. The purpose of this study was to correlate penetration and binding of 14C-PIP in bacterial cells with drug-induced lethal changes assessed by microscopic, microbiologic and biochemical methods.The bacteria used were clinical isolates of Escherichia coli and Pseudomonas aeruginosa (Figure 1). Sensitivity to the drug was determined by serial tube dilution in Trypticase Soy Broth (BBL) at an inoculum of 104 organisms/ml; the minimum inhibitory concentration of piperacillin for both bacteria was 1 μg/ml. To assess drug binding to PBPs, the bacteria were incubated with 14C-PIP (5 μg/0.09 μCi/ml); controls, in drug-free medium.

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