Lymphoid papillary hyperplasia of palatine tonsils: a rare pediatric case from Turkey

Lymphoid papillary hyperplasia (LPH) is a rare abnormality of the tonsils with a tendency to affect young Asian females. We report a case of this rare condition in a 13-year-old girl. To our best knowledge, this case is the only pediatric Turkish case of LPH reported in the literature. The significance of recognizing this abnormality lies in its clinical appearance, given the fact that despite the clinical characteristics suggesting a diagnosis of epithelial papilloma or evenmalignancy, this process is benign, non-neoplastic, can readily be differentiated from other neoplastic lesions by histologic examination, and can easily be cured by tonsillectomy. (C) 2015 Elsevier Ireland Ltd. All rights reserved

Sıçanlarda altlık değişim sıklığının lipid peroksidasyon, antioksidan durum ve histopatolojik değişiklikler üzerine etkileri

The aim of this research was to evaluate the effect of bedding change frequency on oxidative stress parameters of rats. In the experiment; animals were randomly and equally divided into 4 groups, each group consisted of 6 male rats. Group 1; bedding change every day, Group 2; bedding change once in 2 days, Group 3; bedding change once in 4 days, and Group 4; bedding change once in a week. Dust-free wood shavings were used as bedding material and the study lasted for 2 months. At the end of experimental period, MDA levels were found to be increased in blood, liver, kidney, heart, brain, and lung of groups with longer intervals of bedding change whereas GSH levels of these tissues were decreased. It was also found that SOD and CAT activities were higher in erythrocyte and lung tissues in Group 1 than the other groups. Moreover, notable histopathological alterations were observed in the tissues of longer intervals of bedding change (especially, group 3 and 4). As a result, it has been determined that long periods of bedding change in animals causes oxidative stress, tissues damages, and these alterations adversely affect the life quality of laboratory animals.Bu araştırmanın amacı sıçanlarda altlık değişim sıklığının oksidatif stres parametreleri üzerine etkisi değerlendirmektir. Çalışmada hayvanlar her grupta 6 erkek sıçan olacak şekilde rastgele ve eşit olarak 4 gruba ayrıldı. Gruplar: Grup 1; her gün altlığı değişen, Grup 2; 2 günde bir altlığı değişen, Grup 3; 4 günde bir altlığı değişen ve Grup 4; haftada bir altlığı değişen şeklinde oluşturuldu. Çalışma 2 ay olacak şekilde planlandı ve altlık malzemesi olarak tozsuz ağaç talaşı kullanıldı. Çalışmanın sonunda, daha uzun aralıklarla altlık değişimi olan gruplarda kan, karaciğer, böbrek, kalp, beyin ve akciğer dokularında MDA düzeylerinin arttığı, bu dokulardaki GSH düzeylerinin ise azaldığı görülmüştür. Ayrıca, eritrosit ve akciğer dokularında SOD ve CAT aktivitelerinin Grup 1'de, diğer gruplardan daha yüksek olduğu belirlendi. Ayrıca, daha uzun aralıklarla altlıkları değişen grupların (özellikle grup 3 ve 4) beyin, akciğer, kalp, karaciğer ve böbrek dokularında histopatolojik değişiklikler gözlendi. Sonuç olarak, hayvanlarda uzun aralıklarla altlık değişiminin oksidatif strese, doku hasarlarına yol açarak laboratuvar hayvanlarının yaşam kalitesini olumsuz etkilediği belirlenmiştir

Quasisynchronous LoRa for LEO nanosatellite communications

Perfect synchronization in LoRa communications between Low Earth Orbit (LEO) satellites and ground base stations is still challenging, despite the potential use of atomic clocks in LEO satellites, which offer high precision. Even by incorporating atomic clocks in LEO satellites, their inherent precision can be leveraged to enhance the overall synchronization process, perfect synchronization is infeasible due to a combination of factors such as signal propagation delay, Doppler effects, clock drift and atmospheric effects. These challenges require the development of advanced synchronization techniques and algorithms to mitigate their effects and ensure reliable communication from / to LEO satellites. However, maintaining acceptable levels of synchronization rather than striving for perfection, quasisynchronous (QS) communication can be adopted which maintains communication reliability, improves resource utilization, reduces power consumption, and ensures scalability as more devices join the communication. Overall, QS communication offers a practical, adaptive, and robust solution that enables LEO satellite communications to support the growing demands of IoT applications and global connectivity. In our investigation, we explore different chip waveforms such as rectangular and raised cosine. Furthermore, for the first time, we study the Symbol Error Rate (SER) performance of QS LoRa communication, for different spreading factors (SF), over Additive White Gaussian Noise (AWGN) channels.IEEE Communications Societ

Beam selection for ambient backscatter communication in beamspace mmWave symbiotic radio

The Internet of Things revolution has profoundly impacted wireless communication systems. Access to high data rates is now just as important as low power operation. The use of incident millimeter-wave (mmWave) signals for ambient backscatter communication (AmBC) has shown significant promise for delivering high data rates. However, due to channel sparsity, incident signal availability to backscatter devices (BDs) at mmWave is erratic. In order to address the incident signal inaccessibility problem and enable high data-rate AmBC, this paper presents an efficient beam selection method in the beamspace millimeter-wave symbiotic radio system. The proposed method improves the overall system’s sum-rate performance by up to 30% while ensuring signal accessibility to BDs

Efficient spectrum occupancy prediction exploiting multidimensional correlations through composite 2D-LSTM models

In cognitive radio systems, identifying spectrum opportunities is fundamental to efficiently use the spectrum. Spectrum occupancy prediction is a convenient way of revealing opportunities based on previous occupancies. Studies have demonstrated that usage of the spectrum has a high correlation over multidimensions, which includes time, frequency, and space. Accordingly, recent literature uses tensor-based methods to exploit the multidimensional spectrum correlation. However, these methods share two main drawbacks. First, they are computationally complex. Second, they need to re-train the overall model when no information is received from any base station for any reason. Different than the existing works, this paper proposes a method for dividing the multidimensional correlation exploitation problem into a set of smaller sub-problems. This division is achieved through composite two-dimensional (2D)-long short-term memory (LSTM) models. Extensive experimental results reveal a high detection performance with more robustness and less complexity attained by the proposed method. The real-world measurements provided by one of the leading mobile network operators in Turkey validate these results

Potential protective effect of boron against gentamicin-induced oxidative stress on rat tissues

Çalışmada gentamisin maruziyeti ile toksisite oluşturulan ratlarda borun (B) muhtemel koruyucu etkisinin belirlenmesi amaçlandı. Bu amaçla Wistar albino 56 erkek rat kullanıldı. Her grupta 7 hayvan olacak şekilde, kontrol, gentamisin (100 mg/kg i.p.), B-5 (5 mg/kg B, i.p.), B-10 (10 mg/kg B, i.p.), B-20 (20 mg/kg B, i.p.), B-5 + gentamisin (5 mg/kg B ve 100 mg/kg gentamisin, i.p.), B-10 + gentamisin (10 mg/kg B ve 100 mg/kg gentamisin, i.p.), B-20 + gentamisin (20 mg/kg B ve 100 mg/kg gentamisin, i.p.) olarak 8 gruba ayrıldı. Ratlara B uygulaması gentamisin enjeksiyonundan 4 gün önce verilmeye başlandı. Gentamisin uygulamasına 4. gün başlandı ve 12. gün bu uygulama sonlandırıldı. Gentamisin uygulamasının bitişinden itibaren hayvanlara 2 gün daha B verildi. Uygulama sonunda hayvanlardan anestezi altında karaciğer, kalp, beyin, akciğer ve testis dokuları alındı. Gentamisinin karaciğer dokusunda malondialdehid düzeylerini arttırdığı, buna karşın redükte glutatyon düzeylerini, superoksid dismutaz ve katalaz aktivitelerini azalttığı tespit edildi. Histopatolojik incelemede gentamisinin dokularda hasar oluşturduğu gözlendi. Buna karşın, B uygulamasının gentamisin ile indüklenen hasarı azalttığı tespit edildi.The objective of this study was to determine the protective effects of boron on gentamicin induced toxicity in rats. Rats were divided into eight experimental groups containing seven animals in each group. Experimental groups were as follows; control group (fed without B), gentamicin group (100 mg/kg, i.p.), B-5 group (5 mg/kg B, i.p.), B-10 group (10 mg/kg B, i.p.), B-20 group (20 mg/kg B, i.p.), B-5 + gentamicin group (5 mg/kg B and 100 mg/kg gentamicin, i.p.), B-10 + gentamicin group (10 mg/kg B and 100 mg/kg gentamicin, i.p.), and B-20 + gentamicin group (20 mg/kg B and 100 mg/kg gentamicin, i.p.). B was given to rats before four days. Gentamicin was given to rats on the fourth day and finished on the twelfth day. Also, administration of B was completed the fourteenth day. End of the experiment, liver, hearth, brain, lung, and testis tissues were collected from animals under anaesthesia. Administration of gentamicin increased malondialdehyde levels whereas decreased reduce glutathione levels, superoxide dismutase and catalase activities in the liver. Histopathologically, damages were detected in the tissues of gentamicin group. However, treatment of boron resulted in a reversal of gentamicin-induced damages

Protective effect of taurine against acrylamide-induced oxidative stress in rats

Bu çalışmada, sıçanlarda akrilamid ile oluşturulan oksidatif strese karşı antioksidan ajan olan taurinin koruyucu etkisinin araştırılması amaçlandı. Toplam 35 Wistar erkek sıçan standart rodent yemiyle beslendi ve 5 eşit gruba ayrıldı. I. Grup: kontrol grubu, II. Grup: sadece 15 mg/kg akrilamid 60 gün boyunca gastrik gavaj yolu ile verildi. III., IV. ve V. gruplara sırasıyla akrilamid (15 mg/kg) ve taurin 50, 100 ve 200 mg/kg/gün olacak şekilde ağızdan gastrik gavaj ile verildi. Akrilamid uygulaması sıçanların kan ve dokularında malondialdehid seviyelerinde önemli bir artışa ve glutatyon seviyelerinde azalmaya neden oldu. Buna ilave olarak, akrilamid uygulaması ile süperoksid dismutaz ve katalaz aktivitelerinin sıçan eritrosit ve dokularında azaldığı belirlendi. Taurin uygulamasının akrilamid ile indüklenen oksidatif stres ve lipid peroksidasyonu azaltarak vücudun antioksidan savunma sistemini iyileştirdiği belirlendi. Bunun yanı sıra, taurin uygulaması ile akrilamid verilen sıçanların karaciğer ve beyin dokularındaki IFN-γ, IL-1β, TNF-α ve NFĸB mRNA ekspresyon düzeylerinin azaldığı gözlendi. Ayrıca, taurin dokularda akrilamid ile indüklenen oksidatif stres sonucu oluşan histopatolojik değişikliklere karşı koruyucu etki gösterdi. Sonuçta doza bağlı olarak taurinin sıçanlarda antioksidan savunma mekanizmasını artırarak akrilamidle indüklenen oksidatif strese karşı koruyucu etki gösterdiği belirlendi.The aim of the present study was to evaluate the protective effect of taurine on acrylamide-induced oxidative stress in rats. Totally, 35 Wistar albino male rats were fed standard rodent diet and divided into 5 equal groups. I. Group: control group, II. Group: only 15 mg/kg acrylamide treated by gastric gavage for 60 days. III., IV., and V. group received 15 mg/kg acrylamide with taurine at dose of 50, 100 and 200 mg/kg/day by gastric gavage. Treatment with acrylamide significantly increased malondialdehyde levels and decreased glutathione levels in blood and tissues of rats. Additionally, acrylamide treatment decreased superoxide dismutase and catalase activities in erythrocyte and tissues of rats. However, treatment of taurine inhibited acrylamide-induced oxidative stress, lipid peroxidation, and enhanced the antioxidant enzymes activities. Besides, mRNA expression levels of IFN-γ, IL-1β, TNF-α, and NFĸB in liver and brain of acrylamide exposed rats were decreased with taurine treatment. Moreover, taurine exhibited protective action against the acrylamide-induced histopathological changes in tissues. In conclusion, it was determined that taurine in a dose-dependent manner has a protective effect against acrylamide induced oxidative stress by increasing antioxidant defense mechanism in rats

Social capital and regional development in Turkey

This paper aims to improve the shortcomings of the empirical literature on regional social capital. The following three research questions are addressed: (i) do regional social capital and economic growth have an endoneous (circular) relationship as opposed to the exogenous one-way relationship assumed in the literature; (ii) What are the socio-economic and demographic determinants of cross-regional variation in social capital? And (iii) Are spatial spillovers relevant in the analysis of these questions? Empirically, we pursue the analysis for 81 Turkish provinces in 2015. Indeed, regional social capital in Turkey is far less studied than country-level social capital. The methodology adopted includes kernel density estimates, ordinary least squares, three stage least squares, and spatial error models. In terms of the obtained results, First, regional social capital is heterogenously distributed across regions. Second, social capital has no significant impact on economic growth but the growth induces the generation of social capital (in social norms). This represents a first result of reserve causality in the literature. Third, a typical province that has high social capital is the one with relatively high income, more even income distribution, low unemployment, big households and older age profile. Fourth, there is the evidence of spatial dependence that should be incorporated in empirical analyses

PERFORMANCES OF SESAME GENOTYPES (SESAMUM INDICUM L.) WITH DIFFERENT SEED SHELL COLORS IN SEMI-ARID CLIMATE CONDITIONS

This research was conducted to determine the adaptability of some sesame (Sesamum indicum L.) varieties as a second crop under semi-arid climatic conditions during 2014 and 2015. The experiment was conducted on the research area of Agricultural Faculty, Kezer Campus, Siirt University, Turkey. Thirteen registered sesame species were used as material in the experiment. The experiment was carried out in a randomized block design with four replications. Planting of sesame seeds was performed by hand following the harvest of wheat planted as the first crop. The plant height, number of side branches in the plant, the first branch height in the plant, the number of capsules per plant, the number of seeds per capsule, the weight of 1000 seeds, seed yield, fat content, fat yield and protein content were determined in the study. The results of two-year study revealed that 10 out of 13 varieties were not suitable to semi-arid climatic conditions (Siirt province ecological conditions). The varieties which were not adopted to semi-arid climatic conditions (Tan 99, 6DUÕVX 7DQDV g]EHUN .HSVXW 0XJDQOÕ 57, Baydar 2001, Ottoman 99, Orhangazi 99 and Cumhuriyet 99) are widely cultivated sesame cultivars in the Aegean and Mediterranean regions. The other WKUHH YDULHWLHV $UVODQEH\ +DWLSR÷OX DQG %R\GDN are mostly recommended for the Southeastern Anatolia Region. The study clearly revealed the importance of genotype x climate interaction in adaptation of sesame species to a region