Chelating ion-exchange Properties of Polyurethane Resin Derived from Thiazolo[5,4-D]Thiozole

3,6-dihydrothiazolo [5, 4-d] thiazole which supported on polyurethane was synthesized. The prepared compound was characterized by FTIR and 1H NMR spectroscopy. The chelating properties towards various metal ions Pb2+, Mn2+, Cr3+, Co3+and Cd+3 was examined. The effects of concentration of metal ions, time of extraction and pH as well as the recovery of ions have been studied. The results showed that the high activity order of resin to extract the metal ions is Pb2> Cd+3 > Mn2+>Cr3+> Co3+. Keywords: thiazole, polyurethane, chelating resin, chelating efficiency, coordination polymer

Impact of opioid-free analgesia on pain severity and patient satisfaction after discharge from surgery: multispecialty, prospective cohort study in 25 countries

Background: Balancing opioid stewardship and the need for adequate analgesia following discharge after surgery is challenging. This study aimed to compare the outcomes for patients discharged with opioid versus opioid-free analgesia after common surgical procedures.Methods: This international, multicentre, prospective cohort study collected data from patients undergoing common acute and elective general surgical, urological, gynaecological, and orthopaedic procedures. The primary outcomes were patient-reported time in severe pain measured on a numerical analogue scale from 0 to 100% and patient-reported satisfaction with pain relief during the first week following discharge. Data were collected by in-hospital chart review and patient telephone interview 1 week after discharge.Results: The study recruited 4273 patients from 144 centres in 25 countries; 1311 patients (30.7%) were prescribed opioid analgesia at discharge. Patients reported being in severe pain for 10 (i.q.r. 1-30)% of the first week after discharge and rated satisfaction with analgesia as 90 (i.q.r. 80-100) of 100. After adjustment for confounders, opioid analgesia on discharge was independently associated with increased pain severity (risk ratio 1.52, 95% c.i. 1.31 to 1.76; P < 0.001) and re-presentation to healthcare providers owing to side-effects of medication (OR 2.38, 95% c.i. 1.36 to 4.17; P = 0.004), but not with satisfaction with analgesia (beta coefficient 0.92, 95% c.i. -1.52 to 3.36; P = 0.468) compared with opioid-free analgesia. Although opioid prescribing varied greatly between high-income and low- and middle-income countries, patient-reported outcomes did not.Conclusion: Opioid analgesia prescription on surgical discharge is associated with a higher risk of re-presentation owing to side-effects of medication and increased patient-reported pain, but not with changes in patient-reported satisfaction. Opioid-free discharge analgesia should be adopted routinely

Photoluminescence properties of Na145La855(SiO 4)6(F09O11):Eu for applications as a reddish orange phosphor

Europium-doped Na1.45La8.55-8.55x(SiO 4)6(F0.9O1.1)(0.000 ≤ x ≤ 0.045) phosphors were prepared by a conventional solid-state reaction method at 1200°C and their properties were studied by X-ray diffraction (XRD), and a spectral analysis system. No impurities were observed. The phosphor could be excited at 254 nm, 395 nm and 465 nm to yield a reddish orange emission which was attributed to the 5D0 → 7Fj (j = 0-2) transitions of the Eu ion. ? 2014 World Scientific Publishing Company

Assessing the compressive performance of PVC coating on steel wire mesh reinforced concrete

AbstractReinforced concrete RC is a versatile and durable building material widely used in construction. This study investigated the impact of PVC-coated steel wire mesh layers on the compressive strength of RC. Seven cube specimens (70 × 70×70 mm) with varying numbers of PVC-coated layers were tested after a 28-day curing period. Results showed that specimens with two layers of PVC coating exhibited the highest ultimate compression stress and breaking force, indicating a significant 38% increase in compressive strength compared to those without PVC coating. The findings suggest that PVC-coated steel wire mesh provides a sustainable and cost-effective method for reinforcing RC structures. By mechanically enhancing these structures, their overall mechanical properties can be improved. This research highlights the potential of PVC-coated steel wire mesh as an effective reinforcement technique, offering practical solutions for strengthening concrete structures