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  1. Article ; Online: Assessment of organizational carbon footprints in a denim-washing company: a systematic approach to indirect non-energy emissions.

    Aykaç Özen, Hülya / Vayiç, Bahar / Çoruh, Semra

    Environmental science and pollution research international

    2024  

    Abstract: As stated in the 2016 Paris Agreement, concerns about global climate change and carbon emissions have increased, and organizations, in particular, have embarked on an annual measurement process to estimate their contribution to global climate change. ... ...

    Abstract As stated in the 2016 Paris Agreement, concerns about global climate change and carbon emissions have increased, and organizations, in particular, have embarked on an annual measurement process to estimate their contribution to global climate change. Carbon footprint, one of the measurement methods, is a widely applied tool to assess the environmental impact of organizations. This study presents a real case study of a denim-washing company's activities based on ISO standard calculation methods of greenhouse gas emissions. Accordingly, the annual carbon footprint of the denim-washing company was 2482.09 tCO
    Language English
    Publishing date 2024-05-14
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-024-33640-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Smoke filtration performances of membranes produced from commercial PVA and recycled PET by electrospinning method and ANN modeling

    Özen, Hülya Aykaç / Mutuk, Tuğba / Yiğiter, Merve

    Environ Sci Pollut Res. 2023 Jan., v. 30, no. 2 p.2469-2479

    2023  

    Abstract: Plastic waste and air pollution are becoming a great concern due to their adverse effect on human health and the environment. There is increasing number of evidence showing that recycling plastic and filtering harmful air pollutants are one of the most ... ...

    Abstract Plastic waste and air pollution are becoming a great concern due to their adverse effect on human health and the environment. There is increasing number of evidence showing that recycling plastic and filtering harmful air pollutants are one of the most effective and promising way to eliminate their hazard on the environment. In this purpose, we developed eco-friendly filtration materials from recycled PET by electrospinning method to be used in air filtration and compared them with conventional PVA membranes. Filtration efficiency of prepared membranes were tested homemade membrane system using cigarette smoke source. Characterization results and smoke filtration performance of recycled PET and PVA membranes before and after smoke filtration were examined. The results demonstrated that the removal efficiencies of PVA-5 wt.%, PVA-10 wt.%, and PVA-15 wt.% were 4.11%, 11.32%, and 12.14%, respectively. A similar trend was also observed in recycled PET-5 wt.%, PET-10 wt.%, and PET-15 wt.% membranes with 4.32%, 10.79%, and 11.68% of filtration efficiency, respectively. Based on this result, using recycled PET can be an alternative way to produce a higher value product compared to traditional polymer membranes used commercially. This result is also supported by the neural network model of this study.
    Keywords adverse effects ; air ; air pollution ; cigarettes ; filtration ; human health ; neural networks ; polymers ; smoke ; wastes
    Language English
    Dates of publication 2023-01
    Size p. 2469-2479.
    Publishing place Springer Berlin Heidelberg
    Document type Article ; Online
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-22383-4
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Evaluation of the Effect of Self-Efficacy on Symptoms in Gastrointestinal Cancer Patients.

    Ozkaraman, Ayşe / Kazak, Aysun / Dudaklı, Nuran / Ozen, Hülya

    Journal of palliative care

    2022  Volume 38, Issue 2, Page(s) 207–214

    Abstract: Objective: ...

    Abstract Objective:
    MeSH term(s) Humans ; Adolescent ; Adult ; Middle Aged ; Aged ; Cross-Sectional Studies ; Self Efficacy ; Syndrome ; Neoplasms ; Pain ; Gastrointestinal Neoplasms/complications ; Nausea ; Fatigue/etiology ; Fatigue/epidemiology ; Sleep Wake Disorders/diagnosis ; Sleep Wake Disorders/epidemiology ; Xerostomia
    Language English
    Publishing date 2022-09-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 639326-3
    ISSN 2369-5293 ; 0825-8597
    ISSN (online) 2369-5293
    ISSN 0825-8597
    DOI 10.1177/08258597221125286
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Smoke filtration performances of membranes produced from commercial PVA and recycled PET by electrospinning method and ANN modeling.

    Özen, Hülya Aykaç / Mutuk, Tuğba / Yiğiter, Merve

    Environmental science and pollution research international

    2022  Volume 30, Issue 2, Page(s) 2469–2479

    Abstract: Plastic waste and air pollution are becoming a great concern due to their adverse effect on human health and the environment. There is increasing number of evidence showing that recycling plastic and filtering harmful air pollutants are one of the most ... ...

    Abstract Plastic waste and air pollution are becoming a great concern due to their adverse effect on human health and the environment. There is increasing number of evidence showing that recycling plastic and filtering harmful air pollutants are one of the most effective and promising way to eliminate their hazard on the environment. In this purpose, we developed eco-friendly filtration materials from recycled PET by electrospinning method to be used in air filtration and compared them with conventional PVA membranes. Filtration efficiency of prepared membranes were tested homemade membrane system using cigarette smoke source. Characterization results and smoke filtration performance of recycled PET and PVA membranes before and after smoke filtration were examined. The results demonstrated that the removal efficiencies of PVA-5 wt.%, PVA-10 wt.%, and PVA-15 wt.% were 4.11%, 11.32%, and 12.14%, respectively. A similar trend was also observed in recycled PET-5 wt.%, PET-10 wt.%, and PET-15 wt.% membranes with 4.32%, 10.79%, and 11.68% of filtration efficiency, respectively. Based on this result, using recycled PET can be an alternative way to produce a higher value product compared to traditional polymer membranes used commercially. This result is also supported by the neural network model of this study.
    MeSH term(s) Humans ; Filtration/methods ; Plastics ; Recycling/methods ; Positron-Emission Tomography
    Chemical Substances Plastics
    Language English
    Publishing date 2022-08-05
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-22383-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Thrombin generation assay in platelet-poor plasma in children with iron deficiency anemia.

    Özdöl, Umur / Özdemir, Zeynep Canan / Töret, Ersin / Özen, Hülya / Bör, Özcan

    International journal of laboratory hematology

    2023  Volume 46, Issue 2, Page(s) 345–353

    Abstract: Objectives: Iron deficiency anemia (IDA) is the most common type of anemia in childhood and it leads to a hypercoagulable state. We investigated endogenous thrombin production in platelet-poor plasma before and after oral iron replacement in children ... ...

    Abstract Objectives: Iron deficiency anemia (IDA) is the most common type of anemia in childhood and it leads to a hypercoagulable state. We investigated endogenous thrombin production in platelet-poor plasma before and after oral iron replacement in children with IDA using the thrombin generation assay (TGA).
    Methods: A total of 72 children diagnosed with IDA (IDA group) and 60 healthy children (control group) were included in the study. Blood samples were collected from the patients before and 1 month after oral iron replacement. TGA parameters [lag time, time to peak, peak height, endogenous thrombin potential (ETP)] were studied.
    Results: In the IDA group, the lag time and time to peak decreased by 8.3% and 10.6%, respectively, and the endogenous thrombin potential (ETP) and peak height both increased by 30% compared to those of the control group. Compared to the values before iron replacement, 1 month after iron replacement, the lag time and time to peak increased by 8.7% and 5%, respectively, and the ETP and peak height decreased by 31% and 31.3%, respectively, and became similar to those of the control group.
    Conclusion: Children with IDA have increased endogenous thrombin production in platelet-poor plasma and a tendency for hypercoagulability. These changes are reversible, and the ETP values become similar to those of healthy children 1 month after iron replacement.
    MeSH term(s) Child ; Humans ; Thrombin ; Anemia, Iron-Deficiency ; Blood Coagulation Tests ; Thrombophilia ; Iron
    Chemical Substances Thrombin (EC 3.4.21.5) ; Iron (E1UOL152H7)
    Language English
    Publishing date 2023-12-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 2268590-X
    ISSN 1751-553X ; 1751-5521 ; 0141-9854
    ISSN (online) 1751-553X
    ISSN 1751-5521 ; 0141-9854
    DOI 10.1111/ijlh.14206
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Differentiation of peripheral and non-peripheral etiologies in children with vertigo/dizziness: The video-head impulse test and suppression head impulse paradigm.

    Kirbac, Arzu / Kaya, Ercan / Incesulu, Saziye Armagan / Carman, Kursat Bora / Yarar, Coskun / Ozen, Hulya / Pinarbasli, Mehmet Ozgur / Gurbuz, Melek Kezban

    International journal of pediatric otorhinolaryngology

    2024  Volume 179, Page(s) 111935

    Abstract: Objectives: To identify the etiology of vertigo/dizziness and determine the effectiveness of the video-head impulse test (vHIT) and the suppression head impulse paradigm (SHIMP) tests in distinguishing between peripheral and non-peripheral etiologies in ...

    Abstract Objectives: To identify the etiology of vertigo/dizziness and determine the effectiveness of the video-head impulse test (vHIT) and the suppression head impulse paradigm (SHIMP) tests in distinguishing between peripheral and non-peripheral etiologies in children who presented to the otolaryngology department with complaints of vertigo/dizziness.
    Methods: The vHIT and SHIMP tests were applied to the children. The vestibulo-ocular reflex (VOR) gain and saccade parameters were compared.
    Results: In 27 children presenting with vertigo/dizziness, the most common etiological factor was inner ear malformation (IEM) (n = 6/27, 22.2%), followed by cochlear implant surgery (11.1%) and migraine (11.1%). Vestibular hypofunction was indicated by the vHIT results at a rate of 60% (9/15 children) and SHIMP results at 73.3% (11/15 children) among the children with a peripheral etiology, while these rates were 8.3% (1/12 children) and 25% (3/12 children), respectively, in the non-peripheral etiology group. SHIMP-VOR and vHIT-VOR gain values had a moderate positive correlation (p = 0.01, r = 0.349). While there were overt/covert saccades in the vHIT, anti-compensatory saccade (ACSs) were not observed in the SHIMP test (p = 0.041). The rates of abnormal vHIT-VOR gain (p = 0.001), over/covert saccades (p = 0.019), abnormal vHIT response (p = 0.014), ACSs (p = 0.001), and abnormal SHIMP response (p = 0.035) were significantly higher in the peripheral etiology group.
    Conclusions: IEM was the most common etiological cause, and the rate of vestibular hypofunction was higher in these children with peripheral vertigo. vHIT and SHIMP are effective and useful vestibular tests for distinguishing peripheral etiology from non-peripheral etiology in the pediatric population with vertigo/dizziness. These tests can be used together or alone, but the first choice should be the SHIMP test, considering its short application time (approximately 4-5 min) and simplicity.
    MeSH term(s) Child ; Humans ; Head Impulse Test/methods ; Dizziness ; Vertigo/diagnosis ; Vertigo/etiology ; Saccades ; Reflex, Vestibulo-Ocular/physiology
    Language English
    Publishing date 2024-04-02
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 754501-0
    ISSN 1872-8464 ; 0165-5876
    ISSN (online) 1872-8464
    ISSN 0165-5876
    DOI 10.1016/j.ijporl.2024.111935
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Audio-vestibular and radiological analysis in Meniere's disease.

    Kirbac, Arzu / Incesulu, Saziye Armagan / Toprak, Ugur / Caklı, Hamdı / Ozen, Hulya / Saylisoy, Suzan

    Brazilian journal of otorhinolaryngology

    2022  Volume 88 Suppl 3, Page(s) S117–S124

    Abstract: Objective: Intravenous gadolinium-enhanced inner ear magnetic resonance imaging (IV Gd-enhanced inner ear MRI) is a new technique for diagnosing Meniere's disease (MD). Vestibular tests have also long been used for MD, but which tests should be included ...

    Abstract Objective: Intravenous gadolinium-enhanced inner ear magnetic resonance imaging (IV Gd-enhanced inner ear MRI) is a new technique for diagnosing Meniere's disease (MD). Vestibular tests have also long been used for MD, but which tests should be included in the oto-neurological test battery remains controversial. The evaluation method to be used to confirm the clinical diagnosis in MD is not clear. This study aimed to examine the results of vestibular tests and IV Gd-enhanced inner ear MRI in individuals diagnosed with unilateral definite Meniere's disease.
    Methods: IV Gd-enhanced inner ear MRI (Endolymphatic Hydrops [EH] and Perilymphatic Enhancement [PE]), conventional audiometry (0.25-8 kHz), video Head Impulse Test (vHIT), cervical Vestibular Evoked Myogenic Potential (cVEMP), air caloric test, and dizziness handicap inventory were applied to 16 adult patients diagnosed with unilateral definite MD.
    Results: Among the patients with definite MD, EH (cochlear and/or vestibular) was identified in 93.7% and 68.7% of the symptomatic and the asymptomatic ears, respectively. There was a positive correlation between the hearing thresholds at 2, 4, 6 and 8 kHz and the degree of cochlear EH (p < 0.05). PE (cochlear and/or vestibular) was observed in 37.5% of the asymptomatic and symptomatic ears. The sensitivity of the vestibular test battery (vHIT, cVEMP, and caloric test) was 100% and its specificity was 50%, while the sensitivity of the IV Gd-enhanced inner ear MRI (EH and PE together) was 93.8% and the specificity was 81.3%.
    Conclusion: MRI had higher sensitivity and specificity than the vestibular test battery. PE or vHIT alone was not considered to be reliable in the diagnosis of MD. In suspected MD, the clinical history, hearing tests, and IV Gd-enhanced inner ear MRI are sufficient for diagnosis. If MRI technique is not possible, vestibular tests (caloric test and cVEMP, not vHIT) can provide reliable results when evaluated together.
    Language English
    Publishing date 2022-10-11
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 2428110-4
    ISSN 1808-8686 ; 1808-8694
    ISSN (online) 1808-8686
    ISSN 1808-8694
    DOI 10.1016/j.bjorl.2022.08.003
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  8. Article ; Online: Evaluation of ketogenic diet therapy in children diagnosed with drug-resistant epilepsy: a single-center experience.

    Yıldırım, Gonca Kılıç / Yağcı, Murat / Uygur, Anıl Çiğdem / Özen, Hülya / Yarar, Coşkun / Çarman, Kürşat Bora

    The Turkish journal of pediatrics

    2022  Volume 64, Issue 3, Page(s) 435–445

    Abstract: Background: We evaluate here the effect of the ketogenic diet (KD) on children with drug-resistant epilepsy (DRE) in terms of clinical effectiveness, anthropometric measurements, and some electroencephalogram (EEG) and biochemical findings.: Methods: ...

    Abstract Background: We evaluate here the effect of the ketogenic diet (KD) on children with drug-resistant epilepsy (DRE) in terms of clinical effectiveness, anthropometric measurements, and some electroencephalogram (EEG) and biochemical findings.
    Methods: Included in the study were 18 children (median age 70 months, 61.1% female) who received the classical KD and modified Atkins diet (MAD) for at least one year due to DRE. The patients` demographic and laboratory data; weight, height and body mass index values; EEG and electrocardiographic findings; abdominal ultrasonography findings; and biochemical parameters were recorded at baseline and at 12 months after the initiation of the diet. A reduction of ≥50% in the number of seizures was accepted as a response to KD.
    Results: Classic KD was chosen for 14 patients (77.8%), and MAD for four patients (22.2%). The response to KD therapy (≥50% reduction) was 55.5% (n = 10) (p = 0.008), and one patient even became seizure-free. By the 12th month of treatment, 10 patients had experienced a reduction of more than 50% in epileptiform discharges, as indicated by EEG findings. There was no difference in seizure reduction between the patients who received classical KD and MAD. A total of 11.1% of the children lost weight during KD treatment. The most common side effect was constipation (n = 10, 55.6%). At the end of one year of treatment, total cholesterol and low density lipoprotein cholesterol (LDL-C) LDL-C levels had increased dramatically, while fasting blood glucose levels had decreased significantly.
    Conclusions: Our study suggests that KD treatment provides good clinical efficacy in the treatment of pediatric DRE, and can significantly reduce the frequency of epileptic discharges. Also, total cholesterol and LDL-C levels increased significantly, and fasting blood glucose levels decreased significantly compared to the baseline levels.
    MeSH term(s) Blood Glucose ; Child, Preschool ; Cholesterol, LDL ; Diet, Carbohydrate-Restricted ; Diet, Ketogenic/adverse effects ; Drug Resistant Epilepsy ; Epilepsy ; Female ; Humans ; Male ; Seizures ; Treatment Outcome
    Chemical Substances Blood Glucose ; Cholesterol, LDL
    Language English
    Publishing date 2022-07-28
    Publishing country Turkey
    Document type Journal Article
    ZDB-ID 123487-0
    ISSN 2791-6421 ; 0041-4301
    ISSN (online) 2791-6421
    ISSN 0041-4301
    DOI 10.24953/turkjped.2020.3091
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  9. Article: Investigation of Factors Influencing Thoroughbred Horses' Racing Career Length in Turkey

    Özen, Doğukan / Kaya, Ufuk / Özen, Hülya / Ambarcioğlu, Pınar / Ünal, Necmettin / Gürcan, İsmayil Safa

    Journal of equine veterinary science. 2021 Dec., v. 107

    2021  

    Abstract: The aim of this research was to determine the average length of a Thoroughbred horse's racing career in Turkey using survival functions of Thoroughbred horses with various characteristics. In addition, the aim was to identify risk factors that could ... ...

    Abstract The aim of this research was to determine the average length of a Thoroughbred horse's racing career in Turkey using survival functions of Thoroughbred horses with various characteristics. In addition, the aim was to identify risk factors that could influence the duration of a Thoroughbred horse's racing career and develop a survival model that took these factors into account. A total of 11,721 Thoroughbred horses born in 2007 and later were included in the study population. The horses involved in the study were followed for a minimum of 1 year. Kaplan-Meier analysis was used to calculate the average length of racing career for each factor studied. Extended Cox regression analysis was used to determine the risk factors upon time of career ending and to create a survival model. Results showed that, the mean career length of Thoroughbred horses was 17.79 months (95% CI: 17.41–18.13). Also, "starting age of the race," "number of starts," "type of track where the race started," "racing on a single type racetrack" and "earning status" were found risk factors that affect the length of the racing career. Earnings was the top relative contributor to the established model, and its sole adjusted effect showed that being in the lowest earning group increased the hazard of career ending 2.28 times (95% CI:1.98–2.61) compared to horses with highest earning group. In conclusion, clear differences upon the length of racing career was observed for each investigated factor. Future studies should be considerate of these differences when analyzing population data.
    Keywords Thoroughbred ; horses ; models ; regression analysis ; veterinary medicine
    Language English
    Dates of publication 2021-12
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 2102631-2
    ISSN 1542-7412 ; 0737-0806
    ISSN (online) 1542-7412
    ISSN 0737-0806
    DOI 10.1016/j.jevs.2021.103782
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Relationship between oxidant-antioxidant status and hypercoagulobility indices in children with iron deficiency anaemia.

    Özdemir, Zeynep Canan / Çolak, Emine / Kar, Yeter Düzenli / Özen, Hülya / Bör, Özcan

    Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosis

    2021  Volume 32, Issue 7, Page(s) 451–457

    Abstract: Oxidative stress is a potential mechanism involved in the pathogenesis of iron deficiency anaemia (IDA). Although a tendency for hypercoagulability has been reported in IDA, its underlying mechanism is yet to be elucidated. This study investigated the ... ...

    Abstract Oxidative stress is a potential mechanism involved in the pathogenesis of iron deficiency anaemia (IDA). Although a tendency for hypercoagulability has been reported in IDA, its underlying mechanism is yet to be elucidated. This study investigated the probable relationship between oxidative stress and hypercoagulability in children with IDA. This study included 57 children diagnosed with IDA (IDA group) between October 2016 and October 2017 in addition to 48 healthy children (control group). The maximum clot firmness (MCF) index, and clot formation time (CFT) index, which are indicators of hypercoagulability in rotational thromboelastometry assays [intrinsic TEM (INTEM) and extrinsic TEM (EXTEM)] derived from our previous study, were recorded. Total oxidant status (TOS), total antioxidant capacity (TAC) and oxidative stress index (OSI) were analysed from serum samples of the individuals. In IDA group, OSI and TOS levels were higher and TAC level was lower compared to the control group (P < 0.001, for all). The EXTEM and INTEM MCF in the IDA group was higher than in the control group, while the INTEM CFT was lower than in the control group (P < 0.001, P < 0.001, P < 0.05, published data).TOS and OSI had a negative correlation with INTEM CFT (r:-0.361, P < 0.001 and r:-0.333, P = 0.001) and a positive correlation with INTEM MCF (r:+0.420, P < 0.001 and r:+0.367, P < 0.001) and EXTEM MCF (r:+0.476, P < 0.001 and r:+0.403, P < 0.001). However, TAC demonstrated no correlation with CFT and MCF index. The oxidant-antioxidant balance is disrupted in favour of oxidative stress in children with IDA. In addition, TOS and OSI, which are parameters of oxidative stress, are correlated with CFT and MCF indices. Oxidative stress appears to be an important factor for the development of tendency to hypercoagulability in IDA.
    MeSH term(s) Adolescent ; Anemia, Iron-Deficiency/blood ; Anemia, Iron-Deficiency/complications ; Anemia, Iron-Deficiency/metabolism ; Blood Coagulation ; Child ; Child, Preschool ; Female ; Humans ; Male ; Oxidative Stress ; Thrombophilia/blood ; Thrombophilia/complications ; Thrombophilia/metabolism
    Language English
    Publishing date 2021-07-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 1033551-1
    ISSN 1473-5733 ; 0957-5235
    ISSN (online) 1473-5733
    ISSN 0957-5235
    DOI 10.1097/MBC.0000000000001060
    Database MEDical Literature Analysis and Retrieval System OnLINE

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