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Argui H, Suner SC, Periz ÇD, Ulusoy S, Türker G, Ben-Attia M, Büyükkaya F, Oral A, Coşkun Y, Said H. Preparation of cypress ( Cupressus sempervirens L.) essential oil loaded poly(lactic acid) nanofibers. OPEN CHEM 2021. [DOI: 10.1515/chem-2021-0065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Abstract
This study investigated the production of poly(lactic acid) (PLA) nanofibers containing cypress (CUP) essential oil (EO) via electrospinning. The nanofibers were produced from polymer solution prepared with different percentages of cypress EO. Cypress EO-containing PLA nanofibers were characterized and some mechanical and thermal properties were examined using thermogravimetric analysis, scanning electron microscopy, Fourier-transform infrared spectroscopy, and dynamic mechanical analysis. The thermal stability of the nanofibers was reduced depending on the percentage of the cypress EO. As the ratio of the cypress EO to polymer matrices was increased, it was observed that the glassy transition temperatures of the nanofibers decreased and their flexibility increased. The T
g value was determined to be 53.74°C for the neat PLA nanofiber, while 51.83°C for the PLA-CUP nanofiber (containing 15% cypress EO). According to the results of releasing trial, the increased amount of cypress EO resulted in less cypress EO releasing from polymer matrices. The nanofibers were observed to exhibit antibacterial activity against Escherichia coli and Staphylococcus aureus. The inhibition zone diameter of the nanofibers containing 10% cypress EO was 20 mm for S. aureus and 16 mm for E. coli, while 10 mm in the presence of Kanamycin.
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Affiliation(s)
- Hayfa Argui
- Materials Chemistry Laboratory, Department of Chemistry, Faculty of Sciences of Bizerte, University of Carthage , 7021 , Jarzouna , Tunisia
- Biomonitoring of the Environment Laboratory (LR01/ES14), Department of Chemistry, Faculty of Sciences of Bizerte, University of Carthage , 7021 , Jarzouna , Tunisia
| | - Salih Can Suner
- Department of Chemistry and Chemical Processing, Lapseki Vocational School, Canakkale Onsekiz Mart University , 17800 , Canakkale , Turkey
| | - Çağdaş Deniz Periz
- Department of Biology, Faculty of Art and Science, Suleyman Demirel University , 32200 , Isparta , Turkey
| | - Seyhan Ulusoy
- Department of Biology, Faculty of Art and Science, Suleyman Demirel University , 32200 , Isparta , Turkey
| | - Gülen Türker
- Department of Food Technology, Faculty of Canakkale Applied Sciences, Canakkale Onsekiz Mart University , 17020 , Çanakkale , Turkey
| | - Mossadok Ben-Attia
- Biomonitoring of the Environment Laboratory (LR01/ES14), Department of Chemistry, Faculty of Sciences of Bizerte, University of Carthage , 7021 , Jarzouna , Tunisia
| | - Fikret Büyükkaya
- Department of Medical Science, Faculty of Istanbul Medical, Istanbul University , 34119 , Istanbul , Turkey
| | - Ayhan Oral
- Department of Chemistry, Faculty of Art and Science, Canakkale Onsekiz Mart University , 17100 , Çanakkale , Turkey
| | - Yalçın Coşkun
- Department of Plant Production and Animal Husbandry, Lapseki Vocational School, Canakkale Onsekiz Mart University , 17800 , Canakkale , Turkey
| | - Hechmi Said
- Materials Chemistry Laboratory, Department of Chemistry, Faculty of Sciences of Bizerte, University of Carthage , 7021 , Jarzouna , Tunisia
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Kızılkaya B, Doğan F, Akgül R, Türker G. Biosorption of Co(II), Cr(III), Cd(II), and Pb(II) Ions from Aqueous Solution Using NonlivingNeochloris PseudoalveolarisDeason & Bold: Equilibrium, Thermodynamic, and Kinetic Study. J DISPER SCI TECHNOL 2012. [DOI: 10.1080/01932691.2011.599214] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kızılkaya B, Türker G, Akgül R, Doğan F. Comparative Study of Biosorption of Heavy Metals Using Living Green AlgaeScenedesmus quadricaudaandNeochloris pseudoalveolaris: Equilibrium and Kinetics. J DISPER SCI TECHNOL 2012. [DOI: 10.1080/01932691.2011.567181] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
OBJECTIVE To evaluate the effect of domperidone use on corrected QT interval in premature infants. STUDY DESIGN A prospective study of premature infants receiving domperidone was included in this study. A baseline electrocardiogram was obtained just before and 3, 7 and 14 days after initiation of domperidone. Corrected QT was considered prolonged if it exceeded the upper limit for age. RESULT A total of 40 premature infants were enrolled in this study. The mean birth weight of 1109+/-332 g, mean gestational age of 28.8+/-2.4 years and mean age at the onset of domperidone were 32.8+/-2 days. No difference in corrected QT interval was observed between just before and 3, 7 and 14 days after the start of the treatment. Two infants had corrected QT interval prolongation without any clinical side effect that resolved spontaneously. CONCLUSION Our experience suggests that domperidone administered cautiously in modest doses does not result in arrhythmias or conduction defects in premature infants statistically. Additional data are needed to give optimal advice regarding the safety of domperidone treatment in premature infants.
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Affiliation(s)
- A Günlemez
- Department of Neonatology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey.
| | - A Babaoğlu
- Section of Pediatric Cardiology, Department of Pediatrics, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
| | - A E Arısoy
- Section of Neonatology, Department of Neonatology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
| | - G Türker
- Section of Neonatology, Department of Neonatology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
| | - A S Gökalp
- Section of Neonatology, Department of Neonatology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
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Oktor K, Yilmaz S, Türker G, Erkuş E. Speciative determination of Cr (III) and Cr (VI) in dyeing waste water of Dil Creek discharge to Izmit Gulf (Izmit-Kocaeli, Turkey) by ICP-AES. Environ Monit Assess 2008; 141:97-103. [PMID: 17665140 DOI: 10.1007/s10661-007-9881-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2006] [Accepted: 07/03/2007] [Indexed: 05/16/2023]
Abstract
Wastewater pollution in industrial areas is one of the most important environmental problems. Heavy metal pollution, especially chromium pollution in wastewater sources from dyeing and tannery has affected the life on earth. This pollution can affect all ecosystems and human health directly or by food chain. Therefore, the determination of chromium in this study is of great importance. Dil Creek is located in the eastern Marmara region and discharges into the Izmit Gulf. This water source is used for irrigation in agriculture and as drinking water for animals. In this study, a rapid, sensitive and selective method for the speciative direct determination of Cr (III) and Cr (VI) in dyeing waste water samples collected from the nearest station to Izmit Gulf of Dil Creek in May 2006 by inductively coupled plasma-atomic emission spectrometry (ICP-AES) has been developed. An analysis of a given sample is completed in about 15 min for ICP-AES the method. As the result of the chromium analysis, the limit of quantification (LOQ) for the Cr (III), Cr (VI) and total Cr were founded as 0.0111 +/- 0.0002 mg/l (RSD, 1.80%), 0.0592 +/- 0.0010 mg/l (RSD, 1.70%) and 0.0703 +/- 0.0020 mg/l (RSD, 2.84%) respectively. In addition, the general mathematical formula has been developed to calculate the concentration of Cr(III), which can be applied to any other metal species. The result of Cr (VI) analysis indicated that water quality of Creek was IV. class quality according to the inland water classification. In order to validate the applied method, recovery studies were performed.
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Affiliation(s)
- Kadriye Oktor
- Department of Environment Engineering, Faculty of Engineering, University of Kocaeli, Veziroglu Campus, 41040 Izmit-Kocaeli, Turkey
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Alat I, Türker G, Akpinar MB, Taşkapan H, Kekilli E, Eğri M, Aydin OM. A dilemma: prophylaxis for pulmonary embolism after surgical or invasive interventions for hemodialysis. MINERVA CHIR 2006; 61:315-23. [PMID: 17122764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
AIM This study was designed to investigate if it needs to do prophylaxis for pulmonary embolism in the patients treated with different kinds of dialysis or not, and if it is, to find a proper method for prophylaxis. METHODS Ten numbers of patients with central venous catheters (CVC group), 13 numbers of patients with arteriovenous fistula (AVF group) were enrolled in this study. Eleven patients treated with peritoneal dialysis (PD group) were utilized as a control group. Clinical and laboratory examinations to exclude pulmonary embolism were carried out in both AVF and PD groups at the onset and after three months. Same examinations were performed in CVC group at the onset and after 3 weeks (mean: 21 days). Examinations to exclude pulmonary embolism consist of medical history, clinical examinations, d-dimer measures, chest x-ray, respiratory function tests, blood gas analyses, ventilation-perfusion scintigraphies. RESULTS Neither clinical nor laboratory findings in any stages reflected any suspicion for pulmonary embolism. None of the patients in any groups was admitted with pulmonary embolism in any period of follow-up. There was not any statistically difference between the outcomes of all first examinations and of all second ones (P>0.005). Neither obvious nor subclinical pulmonary embolism was detected in any case. None of the patients had deep venous thrombosis in any stage of follow-up. CONCLUSIONS Conventional techniques of haemodialysis do not lead to pulmonary embolism unless deep venous thrombosis due to any intervention occurs in the patients. Thus, prophylactic anticoagulant usage to prevent pulmonary embolism is not necessary in haemodialysis patients. To shorten the length of stay of central venous catheters is the most important factors for pulmonary embolism prophylaxis in haemodialysis patients.
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Affiliation(s)
- I Alat
- Inönü University Medical Faculty, Department of Cardiovascular Surgery, Malatya, Turkey.
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Türker G, UCkunkaya N, Yilmazlar A, Demirag B, Tokat O. Effects of adding epinephrine plus fentanyl to low-dose lidocaine for spinal anesthesia in outpatient knee arthroscopy. Acta Anaesthesiol Scand 2003; 47:986-92. [PMID: 12904191 DOI: 10.1034/j.1399-6576.2003.00194.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND This study investigated whether addition of 15 microg epinephrine plus 25 microg fentanyl to lidocaine spinal anesthesia for outpatient knee arthroscopy makes it possible to use a subanesthetic lidocaine dose. The aim was to assess the quality of anesthesia and the suitability of this protocol for outpatient knee arthroscopy. METHODS Seventy-five outpatients scheduled for knee arthroscopy were randomly assigned to one of three spinal anesthetic protocols: Group L10F25 received 10 mg of lidocaine plus 25 micro g fentanyl; Group L10F25E15 received 10 mg of lidocaine plus 25 microg fentanyl plus 15 microg epinephrine; and Group L20F25 received 20 microg lidocaine plus 25 microg fentanyl. Tourniquet pain and surgical pain were assessed using a visual analog scale. If spinal anesthesia was inadequate despite supplementary intravenous analgesia and sedation, the patient was converted to general anesthesia. Recovery times and side-effects in the early postoperative period were recorded. RESULTS The highest level of sensory block was above the T12 dermatome in all patients. Compared with the other groups, significantly more patients in Group L10F25 converted to general anesthesia. Group L10F25 had a significantly higher mean surgical pain score than the other groups. The mean tourniquet pain score was significantly higher in Group L20F25 than Group L10F25E15. Group L10F25E15 had a significantly shorter time to discharge than the other groups. Post-operative nausea and vomiting and drowsiness were more frequent in Group L10F25 than in the other groups. CONCLUSION The combination of 10 mg lidocaine and 25 microg fentanyl plus 15 microg epinephrine provides adequate spinal anesthesia and has favorable recovery characteristics for outpatient knee arthroscopy.
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Affiliation(s)
- G Türker
- Departments of Anesthesiology and Orthopedic Surgery, Uludag University School of Medicine, Bursa, Turkey.
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Türker G, Uçkunkaya N, Yavaşçaoğlu B, Yilmazlar A, Ozçelik S. Comparison of the catheter-technique psoas compartment block and the epidural block for analgesia in partial hip replacement surgery. Acta Anaesthesiol Scand 2003; 47:30-6. [PMID: 12492794 DOI: 10.1034/j.1399-6576.2003.470106.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND The aim of this study was to compare the intra- and postoperative analgesia provided by the catheter-technique psoas compartment block and the epidural block in hip-fractured patients. We also compared hemodynamic stability, motor blockade, ease of performing the technique, and complications. METHODS Thirty patients who underwent partial hip replacement surgery were included in this prospective single-blind study. Subjects were randomly assigned to Group E (n=15; general anesthesia plus epidural block with 15 ml of 0.5% bupivacaine) or Group P (n=15; general anesthesia plus psoas compartment block with 30 ml of 0.5% bupivacaine). Hemodynamic parameters were recorded at 10-min intervals intraoperatively. Regional anesthesia procedure time, number of attempts at block, intraoperative blood loss, and need for supplemental fentanyl and/or ephedrine were noted. Postoperatively, a patient-controlled analgesia device delivered an infusion and boluses of bupivacaine/fentanyl. Pain, motor blockade, ambulation time, patient satisfaction with analgesia, and complications were recorded postsurgery. RESULTS The epidural required significantly more attempts than the psoas block, thus procedure time was longer in this group. Group E also showed significantly greater drops in mean arterial blood pressure from baseline at 30, 40 and 50 min after the start of general anesthesia. Significantly more Group E patients required epinephrine supplementation. The groups were similar regarding pain scores (at rest and on movement) and patient satisfaction, but Group E had higher motor blockade scores, longer ambulation time, and significantly more complications. CONCLUSION The continuous psoas compartment block provides excellent intraoperative and postoperative analgesia with a low incidence of complications for partial hip replacement surgery
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MESH Headings
- Aged
- Analgesia, Epidural/adverse effects
- Analgesia, Patient-Controlled
- Analgesics, Opioid/administration & dosage
- Analgesics, Opioid/therapeutic use
- Anesthetics, Local/administration & dosage
- Anesthetics, Local/therapeutic use
- Arthroplasty, Replacement, Hip
- Blood Loss, Surgical
- Bupivacaine/administration & dosage
- Bupivacaine/therapeutic use
- Catheterization
- Female
- Fentanyl/administration & dosage
- Fentanyl/therapeutic use
- Hemodynamics/drug effects
- Hip Fractures/surgery
- Humans
- Male
- Middle Aged
- Nerve Block/adverse effects
- Orthopedic Procedures
- Pain, Postoperative/drug therapy
- Prospective Studies
- Psoas Muscles
- Single-Blind Method
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Affiliation(s)
- G Türker
- Department of Anesthesiology and Reanimation, Uludag University Medical Faculty, Bursa, Turkey.
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Yilmazlar A, Tokat O, Kutlay O, Yilmazlar T, Türker G. Comparison of the efficacy of 2 mg versus 5 mg tropisetron in the management of post-operative nausea and vomiting. J Int Med Res 2001; 29:385-8. [PMID: 11725824 DOI: 10.1177/147323000102900501] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A randomized, double-blind, placebo-controlled study was carried out to investigate the efficacy of 2 mg versus 5 mg tropisetron in the prevention of post-operative nausea and vomiting. Patients between 22 and 64 years old who were undergoing surgery under general anaesthesia and who had been classified according to the American Society of Anesthesiologists criteria with physical status I or II were included in this trial. Sixty female patients were recruited and divided into three groups (n = 20 in each group). Patients in group 1 received saline solution as control, whereas in groups 2 and 3, 2 mg or 5 mg tropisetron, respectively, was administered intravenously as a single dose during the induction of anaesthesia. The number of patients vomiting within the first 2 h following the operation was significantly less in groups 2 and 3 compared with that in group 1 (one of 20 for each of the groups 2 and 3 versus 12 of 20 in group 1). Three patients required rescue anti-emetic medication in each of the groups 2 and 3. In conclusion, 2 mg tropisetron appears to be equally as efficacious as 5 mg in preventing post-operative nausea and vomiting.
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Affiliation(s)
- A Yilmazlar
- Department of Anaesthesiology and Intensive Care, Medical School, Uludağ University, Bursa, Turkey.
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Tokat O, Kelebek N, Türker G, Kahveci SF, Ozcan B. Intravenous immunoglobulin in adult varicella pneumonia complicated by acute respiratory distress syndrome. J Int Med Res 2001; 29:252-5. [PMID: 11471863 DOI: 10.1177/147323000102900313] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Pneumonia is a rare but serious complication of varicella in adults. We report a case of a previously healthy 32-year-old man with varicella pneumonia that was complicated by acute respiratory distress syndrome. He was treated successfully with acyclovir and intravenous immunoglobulin in addition to mechanical ventilation. We conclude that intravenous immunoglobulin, in combination with acyclovir, is a safe and probably effective therapy for adult varicella pneumonia that is complicated by acute respiratory distress syndrome.
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Affiliation(s)
- O Tokat
- Department of Anaesthesiology, Uludağ University Medical School, Bursa, Turkey.
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Altan-Yaycioglu R, Türker G, Akdöl S, Acunaş G, Izgi B. The effects of beta-blockers on ocular blood flow in patients with primary open angle glaucoma: a color Doppler imaging study. Eur J Ophthalmol 2001; 11:37-46. [PMID: 11284483 DOI: 10.1177/112067210101100108] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE To evaluate the effects of four commonly used beta-blockers on ocular blood flow in patients with primary open angle glaucoma (POAG). METHODS Eighty eyes of 40 subjects with POAG were included in the study. Subjects were randomly divided into four groups given timolol maleate 0.50%, betaxolol HCl 0.50%, carteolol 1% or levobunolol 0.50% drops, applied twice daily (one drug to each group). Before beginning the treatment and at the end of the first month ocular blood flow velocity was measured using the color Doppler imaging (CDI) method. In the ophthalmic artery (OA), central retinal artery (CRA) and temporal posterior ciliary artery (TPCA) the peak systolic (PS) and end-diastolic (ED) blood flow velocities were measured and resistive index (RI) values were calculated. The results within each group were analysed using the matched paired student's t-test. The data between groups was compared with one-way analysis of variance (ANOVA) and Tukey-Kramer multiple comparison tests. RESULTS The timolol group showed a significant increase in RI values of TPCA. In the betaxolol group RI decreased significantly in CRA and TPCA, whereas in the carteolol group there was a significant decrease only in CRA. In the levobunolol group there was no change in any artery. CONCLUSIONS. Betaxolol seemed to have a greater vasodilator effect than carteolol, and levobunolol had no effect on the retinal and choroidal vasculature. Timolol may have some vasoconstrictive effect in the ciliary vasculature.
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Affiliation(s)
- R Altan-Yaycioglu
- Department of Ophthalmology, Istanbul University, Istanbul Faculty of Medicine, Turkey.
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