bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis of polyacrylonitrile and mechanical properties of its electrospun nanofibers
Authors: Duan Gaigai , Liu Shuwu , Hou Haoqing 
Published: September 2018

Abstract
Polyacrylonitrile (PAN) nanofibers are very important to achieve high performance carbon nanofibers. In this work, co-polyacrylonitriles (co-PANs) with different molecular weights were synthesized by a simple free-radical polymerization. The effect of the initiator amount on the molecular weight of co-PAN was investigated. The co-PANs with different molecular weight were electrospun into aligned nanofibers by adjusting the absolute viscosity of co-PAN solution into ~1.0 Pa·s. All the co-PAN nanofibers showed smooth surfaces and homogeneous fiber diameters of ~450 nm. Tensile tests were applied to evaluate the mechanical properties of electrospun aligned co-PAN nanofibers. The results indicated that higher molecular weight led to better mechanical performance of electrospun aligned co-PAN nanofibers. When the molecular weight was 2.3×105, the highest strength of 153 MPa, strain of 0.148, and toughness of 16.0 J/g were obtained. These electrospun aligned co-PAN nanofibers could be good candidates for the preparation of high performance carbon nanofibers.
The diagnostic value of a detailed first trimester anomaly scan in fetuses with increased nuchal translucency thickness
Authors: Tekesin Ismail 
Published: September 2018

Abstract

Objectives
To assess the diagnostic value of an early anomaly scan in fetuses with increased nuchal translucency (NT) in the prediction of aneuploidy.

Methods
In this study we analyzed the data of pregnant women obtained at their first trimester screening in our unit. The detailed examination routinely includes measurement of NT and a scan for anatomical defects. For fetuses with an NT≥3.5 mm, the diagnostic power of early major sonographic findings (MSF) regarding abnormal karyotype was calculated.

Results
A total of 7352 first trimester examinations were screened. Two hundred and twenty-two fetuses with an NT≥3.5 mm were analyzed. The median gestational age was 12.5 weeks (range 11.0–14.6) and the median NT was 5.1 mm (range 3.5–15.3). MSF were detected in 51.8% of fetuses with increased NT. Among 115 fetuses with MSF, 91 were aneuploid, yielding a positive predictive value for aneuploidy of 79.1%. In the absence of MSF, the negative predictive value was 70.1%. The presence of MSF was significantly predictive for aneuploidy both in bivariate and multivariate regression analysis.

Conclusion
Our study underlines the importance of a detailed anatomical ultrasound in fetuses with increased NT, as MSF occurred frequently. However, the diagnostic value of MSF regarding aneuploidies appears to be moderate.
Protein carbonylation in freshly diagnosed hypothyroidism is independent of thyrotropin levels
Authors: Chandra Kailash , Iqbal Johar 
Published: September 2018

AbstractBackgroundHypothyroidism is a common endocrine disorder with female preponderance. Protein carbonyls (cP) and malondialdehyde (MDA) are generated due to protein and lipid peroxidation, respectively. Oxidative stress (OS) in freshly diagnosed hypothyroidism met with conflicting data in the research. And, a clear relationship between OS and early hypothyroidism is very limited and obscure. Therefore, we aimed to investigate the association between levels of MDA vs. thyrotropin (TSH) and cP vs. TSH among freshly diagnosed hypothyroid subjects.MethodsWe collected blood samples of 80 hypothyroid subjects prior to initiation of thyroxine therapy to know the association between OS and freshly diagnosed hypothyroidism. Serum MDA, cP along with total cholesterol (TC), low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C) and triacylglycerols (TG) were quantified in patients as well as 80 age- and sex-matched control subjects.ResultsLevels of MDA and cP were significantly elevated among hypothyroid subjects as compared to control. The rise in MDA levels positively correlated with TSH values among the patients. In addition, cP levels were substantially elevated as compared to MDA values; however, it does not correlate with TSH among hypothyroid subjects.ConclusionsOur study found no relationship between cP and TSH in freshly diagnosed hypothyroidism. Though it may be due to differential degradation of protein peroxidation products, the mechanism needs further elucidation in future studies.
Measuring the internal quantum efficiency of light-emitting diodes: towards accurate and reliable room-temperature characterization
Authors: Shim Jong-In , Shin Dong-Soo 
Published: September 2018

Abstract
For accurate and reliable measurement of the internal quantum efficiency (IQE) of light-emitting diodes (LEDs), the method should be theoretically solid and experimentally simple to use without any prior assumption of physical parameters or complicated equipment. In this paper, we critically review the conventional characterization techniques for measuring the IQE of LEDs, including the methods based on temperature-dependent electroluminescence and constant AB(C) models. After reviewing the limitations of the existing IQE measurement techniques, we present the recently proposed method based on the improved AB model, called room-temperature reference-point method (RTRM). The RTRM is then applied to various LED devices to show how the IQE measurement techniques can be utilized to analyze their optoelectronic performances quantitatively.
Military Expenditure and External Debt in South Asia: A Panel Data Analysis
Authors: Abbas Shujaat , Wizarat Shahida 
Published: September 2018

Abstract
This study investigates the effect of military expenditure on the exploding external debt in five major South Asian economies, i.e. Pakistan, Bangladesh, India, Nepal and Sri Lanka from 1990 to 2015 using panel fixed effect regression model. The estimated result reveals that the external debt of selected South Asian countries is positively determined by their military expenditure, and negatively explained by their domestic investment activities. The study urges the efficient utilization of available capital resources into more productive investment activities to create employment for the labor force. The future prosperity of the region lies in the peaceful resolution of all outstanding disputes and a corresponding reduction in military spending that can make the region safe for domestic and international investments.
Development of the Attitudes toward Infertility Scale (ATIS): validity and reliability study
Authors: Siyez Diğdem Müge , Esen Erol , Baran Bahar , Seymenler Seçil , Kağnıcı Dilek Yelda , Siyez Ender 
Published: September 2018

Purpose: The purpose of the study was to develop both a valid and reliable scale to determine the attitudes of university students towards infertility. Materials and Methods: This study was conducted in two phases, Study 1 (n = 443) and Study 2 (n = 309), with university students. Item analysis, exploratory factor analysis, discriminant validity, and internal reliability were calculated in Study 1. Confirmatory factor analysis and internal reliability were calculated in Study 2. Results: The result of exploratory factor analysis showed that the scale has a single factor structure with 12 items and confirmatory factor analysis indicated a good fit of the model for Attitudes Toward Infertility Scale. Cronbach’s alpha coefficients were .85 and .83 for two studies.Conclusion: The findings of this study demonstrate that the Attitudes toward Infertility Scale is a reliable and valid instrument.
Correlation between decompression period and initial volume of large cystic lesions of the mandible: a retrospective CBCT Study
Authors: ULU Murat , KELEBEK Seyfi , KALABALIK Fahrettin , AKÇAY Hüseyin 
Published: September 2018

Purpose: The aim of this retrospective study was to evaluate the outcomes of the decompression of large cystic lesions of the mandible and to analyze the correlation between decompression period and the cone-beam computed tomography (CBCT) volume of initial lesions.Materials and Methods: The retrospective study included 13 patients who underwent decompression due to single cystic lesions. All the cystic lesions were localized in the mandible, between the anterior region and the ramus region. All the lesions recovered completely via decompression alone. Volume of the lesions was measured with CBCT and decompression was conducted with a customized acrylic resin stent inserted in the cystic cavity. Decompression period and initial CBCT volume were compared.Results: Mean age of the patients was 39.85 years, mean decompression periods was 12.38 months, mean follow-up period was 20.15 months, and mean initial CBCT volume was 7076.81 mm3. A positive correlation was found between the volume of the cystic lesions and the decompression period.Conclusion: Decompression can provide useful outcomes in the treatment of large cystic lesions in compatible cases since it provides numerous advantages such as noninvasive surgery, low risk of morbidity and severe complications such as bone fracture and inferior alveolar nerve injury. However, in aggressive cystic lesions such as odontogenic keratocyst and ameloblastoma, subsequent definitive surgery following decompression is recommended.
Incidence of post-infectious glomerulonephritis: single center results
Authors: ATMIŞ Bahriye , KARABAY BAYAZIT Aysun , MELEK Engin , ÇAĞLI Çağla , ANARAT Ali 
Published: September 2018

Purpose: The aim of this study was to retrospectively evaluate the incidence of post-infectious glomerulonephritis (PIGN) in department of Pediatric Nephrology at Cukurova University between November-December 2016. Materials and Methods: The clinical and laboratory datas of 13 children with PIGN who were seen in our clinic between November-December 2016, and their follow-up results were evaluated retrospectively.Results: Thirteen children who diagnosed PIGN were evaluated with the mean age of 9 (3-15) years. All of the patients had history of throat or gastrointestinal infections. Symptoms of the patients at admission were edema (100%), oliguria (38.5%), macroscopic hematuria (23%), hypertension (15.3%), dispnea (15.3%), respectively. Serum complement C3 was low in all patients while one patient had both low serum complement C3 and C4. The patient who had hypocomplementemia (both C3 and C4) also had severe proteinuria and acute kidney injury. Renal biopsy was performed to this patient and diagnosed diffuse proliferative glomerulonephritis after renal biopsy.Conclusion: PIGN is observed with higher incidence in the developing countries in current era. We detected an increase in the number of PIGN patients in a short period and we aimed to draw attention of pediatricians about PIGN patients with different clinical presentations.
Özel yetenek sınavına giren adayların çizim başarısı ile el anatomisi arasındaki ilişki
Authors: KABAKCI Ayse Gül , NARİN Handan , YÜCEL Ahmet Hilmi 
Published: September 2018

Amaç: Bu çalışma, Resim-İş Eğitimi özel yetenek sınavına giren adayların el anatomisinin (parmak uzunlukları, el bileği çap, çevre ve hareket genişliği ölçümleri) desen sınavında aldıkları puan ile ilişkisi olup olmadığını ortaya koymayı amaçlamaktadır.Gereç ve Yöntem: Türkiye’deki bir üniversitenin Eğitim Fakültesi Güzel Sanatlar Eğitimi Bölümü Resim-İş Eğitimi Anabilim Dalı Özel Yetenek Sınavı’na giren adaylar çalışmaya dahil edilmiştir. Öğrencilerin dijital kaliper, esnek olmayan mezura ve dijital inklinometre kullanılarak parmak uzunlukları, el bileği çapı, çevresi ve hareket genişlikleri ölçülmüştür. Bulgular: Çalışmamıza 18-25 yaş arası 161 öğrenci (60 erkek, 101 kız öğrenci) dahil edilmiştir. Desen sınavında elli ve üzerinde puan alan 49 kız, 35 erkek öğrenci, kırk dokuz ve altında puan alan 52 kız, 25 erkek öğrenci bulunmaktadır. Çizim başarısı puanı elli ve üzerinde olan ile kırk dokuz ve altında olanların antropometrik özellikleri karşılaştırıldığında anlamlı fark elde edilememiştir. Sonuç: Bu çalışma, çizim becerisine etki eden pek çok unsurun olduğu ve tek başına antropometrik standartlarla çizim başarısı arasındaki ilişkinin ifade edilmesinin zor olduğunu göstermiştir.
Perbedaan Keterampilan Berpikir Kritis Siswa yang Berbantuan Media Audio Visual dan LKS Cetak Sebagai Panduan Percobaan pada Metode Eksperimen dengan Pendekatan Verifikasi Kelas XI Semester 2 SMA Negeri 1 Sewon
Authors: Suryandari Suryandari 
Published: September 2018

This research purposed to know the differences of student cognitive critical thinking and psychomotor skills, along with knowing where was the better group between audio visual media and paper sheet in student cognitive critical thinking and psychomotor skills as experiment guidelines . Critical thinking skills that analyzed were belonged to priority, analyzed, synthesis, and evaluation aspects.This research was an quasi-experiment with the static pretest posttest group design. The populate was belonged to all student of XI IPA 1, XI IPA 3, and XI IPA 5. The sample was given by cluster random sampling, and the result is XI IPA 1 as the group help by audio visual media, XI IPA 5 as paper sheet. The instruments were 10 questions of critical thinking skill and psychomotor observation sheet. Data were obtained from posttest and psychomotor observation scores. Data analyzing used independent sample T-test and different populate average estimation test.The results showed that there were differences of student cognitive critical thinking and psychomotor skills between of the group that helped by audio visual media and paper sheet, along with the student cognitive critical thinking and psychomotor skills of audio visual media group are better than paper sheet, it was because of the ranges of different average populate estimation in cognitive aspect was ranging from 0,1246 9,2313 and psychomotor was 7,752 12,906 for each α = 5%
ANTIULCER ACTIVITY OF DINITRATE 2-PHENYL-9DIETHYLAMINOETHYLAMINE[1,2-A]BENZIMIDAZOLE WITH HELICOBACTER PYLORI-LIKE DAMAGE OF GASTRIC MUCOSA
Authors: Chernikov M. V. , Oganova M. A. , Gerasimenko A. S. , Artemyev E. A. 
Published: September 2018

The search for new drugs providing effective and safe therapy of acid-dependent diseases of the gastrointestinal tract, continues to be an actual problem of modern pharmacotherapy. One of the most significant pathogenetic mechanisms of these diseases is associated with Helicobacter pylori damage to the gastric mucosa.The aim of this study is the experimental investigation of the antiulcer effect of 2-phenyl-9-diethylaminoethylamine [1,2-a] benzimidazole substance (hereinafter a Benzimidazole derivative substance) on the model of Helicobacter pylori-like gastric mucosal injury in combination with immobilization stress (a restraint).Materials and methods. For modeling a mucous membrane damage to experimental animals (white Wistar male rats), they were injected 120 mmol/l ammonia solution after a 24-hour immobilization stress (restraint). As reference drugs, the following officinal anti-ulcer drugs widely used in clinical practice, had been chosen: Rranitidine (30 mg/kg, 10 mg/kg and 3 mg/kg) and Omeprazole (3 mg/kg, 1 mg/kg and 0.3 mg/kg). The study substance was used in the doses of 30 mg/kg, 10 mg/kg and 3 mg/kg. The maximum doses of the reference drugs were calculated on the basis of maximum daily doses for humans, taking into consideration the interspecies conversion factor. The maximum dose of the substance under study was selected experimentally. The logarithmic dose range was used for the convenience of further calculations of the ED50 value. All the studied objects were introduced intragastrically through a non-traumatic tube.Results and discussion. It has been established that the studied substance significantly reduced the area of mucosal damage relative to the control values in modeling Helicobacter pylori-like gastric mucosal injury provoked by the administration of ammonia solution against the background of gastric mucosal ischemia after a 24-hour restraint. At the same time, the inhibition of ulceration reached 78%, while in the groups receiving Ranitidine and Omeprazole, it reached 66% and 50%, respectively. The calculated ED50 values were the following: for the substance under study – 16.03 mg/kg, and for Ranitidine – 15.99 mg/kg.Conclusion. The gained results indicate that the studied Benzimidazole derivative is superior to analogs in its ability to suppress gastric mucosal ulceration provoked by Helicobacter pylori-like gastric mucosal injury, which confirms the relevance of further study of anti-ulcer activity and the development of the pharmaceutical dosage form based on it.
Critères de choix et de réforme des reproducteurs mâles et femelles dans les élevages de porcs des départements de l’Ouémé et du Plateau au Bénin
Authors: Dotché Ignace Ogoudanan , Ahounou Serge Gbênagnon , Salifou Chakirath Folakè Arikè , Biobou Rodrigue , Kiki Pascal Sègbégnon , Govoeyi Benoit , Antoine-Moussiaux Nicolas , Dehoux Jean-Paul , Mensah Guy Apollinaire , Farougou Souaïbou , Thilmant Pierre , Youssao Abdou Karim Issaka , Koutinhouin Benoît 
Published: September 2018

L’objectif de l’étude a été de décrire les critères de choix et de réforme des reproducteurs porcins au Bénin. Une enquête a été réalisée auprès de 65 éleveurs porcins. L’analyse factorielle des correspondances a été utilisée pour identifier des groupes d’éleveurs en fonction de leurs pratiques au niveau de chaque sexe. Le groupe 1 était composé en majorité de personnes non scolarisées élevant principalement des porcs locaux en liberté. Le groupe 2 était composé majoritairement d’éleveurs de niveau du primaire ou du secondaire. Le groupe 3 comprenait des éleveurs non scolarisés et de niveau du secondaire. Les éleveurs des groupes 2 et 3 utilisaient des races améliorées et des animaux croisés, en claustration. Les critères les plus utilisés pour le choix des mâles dans les élevages ont été l’état de santé, la conformation et les testicules très développés, le nombre de tétines, l’absence de défaut génétique, et la croissance. L’absence de défaut génétique a été plus utilisée dans les groupes 2 et 3, puis les testicules développés dans le groupe 1. Les critères les plus utilisés pour le choix des femelles dans les trois groupes ont été l’état de santé, la taille de la portée, les liens de parenté et la croissance des porcelets. La plupart de ces critères ont été moins utilisés dans le groupe 1. Les critères les plus utilisés pour la réforme des verrats ont été l’âge et la perte de libido. Les principaux critères de réforme des femelles âgées dans tous les groupes ont été le rang de portée et la baisse de la taille de la portée. Cette dernière a été plus utilisée dans les groupes 2 et 3. Pour conclure, les éleveurs disposaient de bons critères de choix et de réforme des reproducteurs qu’il faudrait améliorer afin d’augmenter leur productivité.
Valorisation des tourteaux d’amandes d’hévéa et d’anacarde chez le porc en postsevrage et en croissance
Authors: Kouakou N'Goran David Vincent , Angbo-Kouakou Cho Euphrasie Monique , Koné Gningnini Alain , Kouame Kouadio Bertin , Yéboué François de Paul , Kouba Maryline 
Published: September 2018

La valorisation du tourteau détoxiqué d’amandes d’hévéa (Hevea brasiliensis) (TH) et du tourteau d’amandes déclassées de cajou (Anacardium occidentale) (TA) dans l’alimentation animale a été étudiée chez les porcs croisés de 28 jours (sevrage) à 180 jours. Ces animaux, répartis au sevrage en cinq lots, ont reçu soit un régime témoin (RT), soit un des quatre régimes expérimentaux contenant 7,5 % ou 15 % de TH (TH7,5 et TH15) ou de TA (TA7,5 et TA15). Les croissances journalières ont été de 246 ± 26, 198 ± 41, 191 ± 31, 154 ± 20 et 153 ± 31 g.j-1 de 29 à 89 jours d’âge, et de 511 ± 84, 456 ± 74, 463 ± 140, 460 ± 53 et 504 ± 48 g.j-1 de 90 à 180 jours d’âge, respectivement pour les régimes TH7,5, TH15, TA7,5, TA15 et RT. Les poids vifs à 180 jours ont été de 74 ± 6, 71 ± 10, 65 ± 12, 61 ± 5 et 65 ± 5 kg respectivement pour les mêmes régimes. Les résultats suggèrent que le TH et le TA peuvent être incorporés à 15 % sans effet néfaste dans la ration alimentaire des porcs locaux en postsevrage et en croissance en milieu tropical. Aussi, l’utilisation de ces tourteaux dans l’alimentation des porcs permettrait à la Côte d’Ivoire de réduire sa dépendance vis-à-vis de certaines matières premières importées comme le tourteau de soja.
Comparison of wavelet-based hybrid models for the estimation of daily reference evapotranspiration in different climates
Authors: Araghi Alireza , Adamowski Jan , Martinez Christopher J. 
Published: September 2018

Abstract
Reference evapotranspiration (ETo) is one of the most important factors in the hydrologic cycle and water balance studies. In this study, the performance of three simple and three wavelet hybrid models were compared to estimate ETo in three different climates in Iran, based on different combinations of input variables. It was found that the wavelet-artificial neural network was the best model, and multiple linear regression (MLR) was the worst model in most cases, although the performance of the models was related to the climate and the input variables used for modeling. Overall, it was found that all models had good accuracy in terms of estimating daily ETo. Also, it was found in this study that large numbers of decomposition levels via the wavelet transform had noticeable negative effects on the performance of the wavelet-based models, especially for the wavelet-adaptive network-based fuzzy inference system and wavelet-MLR, but in contrast, the type of db wavelet function did not have a detectable effect on the performance of the wavelet-based models.
Neumann’s Tumor - A Rare Neonatal Tumor
Authors: Sahin Ceyhan , Akış yıldız Zeliha , Kaymakcı Aytekin , Gergin tinay Ozgül 
Published: September 2018

Neumann’s tumor, also known as congenital granular cell tumor, congenital myoblastoma, congenital epulis, was first described by Neumann in 1871. It’s a rare cause of newborn’s intraoral masses. they are usually on the maxilla and soliter , they can rarely be seen on the mandibula and multiple. Even if it is not clinically symptomatic, surgical resection is performed because of its cosmetic appearance, negative psychological effect on the family , differential diagnosis and treatment. Neumann’s tumor is fully cured by surgical resection because it does not show recurrence or metastasis after excision.