Cephalothin Stability in Normal Saline, Five Percent Dextrose in Water, and Dianeal® Solutions
Bibliographic record
Abstract
ABSTRACT The stability of cephalothin sodium (1 g) in polyvinyl chloride minibags containing 50 mL of 0.9% normal saline, 5% dextrose in water (D5W) or 500 mg in 2L of Dianeal® (containing 1.5% or 4.5% dextrose) was evaluated using a validated, stability-indicating, liquid chromatographic method during 30 days storage at 4° C and room temperature (23°C). Physical inspections and pH determinations also completed on each of the 11 study days during the 30 day storage period. During the 30-day study period all solutions lost more than 10% of the initial cephalothin concentration. In D5W and saline solutions stored at 4°C, 10% of the initial concentration was lost within 17 days, and at room temperature 10% was lost within one day. In Dianeal®, regardless of the dextrose concentration, solutions stored at 4°C, lost 10% of the initial concentration within eight days, and at room temperature 10% was lost within one day. During the 30-day study period the pH decreased in every solution. However, the decrease was less than 1.0 of a pH unit. The colour of solutions stored at room temperature gradually changed during the study period, becoming a deeper yellow. Solutions stored at °C remained clear and colourless throughout the study period. We conclude that cephalothin solutions (1 g/50 mL of D5W or normal saline) stored at 4°C for seven days followed by 12 hours storage at room temperature will retain 90% of the initial cephalothin concentration, whereas, cephalothin concentrations stored in Dianeal® (500 mg/2L) at 4°C will lose approximately 8% of the initial concentration after only three days storage at 4°C followed by an additional 12 hours storage at room temperature.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".