124,162 research outputs found
Metallothionein and metals in Geophagus brasiliensis - Acar??
No full textMetalotione??nas (MTs) s??o prote??nas citos??licas cuja fun????o biol??gica est?? relacionada ?? regula????o de metais essenciais e a detoxifica????o de metais t??xicos. O conhecimento da compartimentaliza????o intracelular de metais, da fun????o fisiol??gica das MTs e dos fatores que controlam seus n??veis em diferentes esp??cies de peixes ?? essencial para compreens??o dos efeitos t??xicos induzidos por metais. Geophagus brasiliensis (acar??) ?? uma esp??cie nativa do Brasil, com ampla distribui????o e aspectos ecol??gicos que favorecem sua utiliza????o como esp??cie bioindicadora dos efeitos da polui????o ambiental por metais. Este trabalho teve por objetivo estudar MT e metais em acar??s, analisando a influ??ncia dos par??metros biol??gicos do animal, al??m das altera????es produzidas pela exposi????o a um metal t??xico como c??dmio (Cd). Acar??s coletados no rio Guandu foram divididos em dois grupos. (...) Neste estudo foi verificado que MT e metais em acar??s s??o influenciados por alguns par??metros biol??gicos. A exposi????o ao Cd tamb??m promove uma altera????o nos n??veis de MT e de metais bem como na distribui????o intracelular. Estes fatores est??o relacionados com ?? toxicidade e a toler??ncia ?? exposi????o a metais e devem ser considerados para que esta esp??cie possa ser utilizada como bioindicadora da exposi????o ambiental a metai
Study of Defects in GaAs by 2D-ACAR Positron Annihilation
No full textWe describe the two dimensional angular correlation of positron annihilation radiation (2D-ACAR) method and show that it can be advantageously used to study the electronic structure of defects, in addition to standard positron lifetime and Doppler broadening measurements. Using annihilation fractions determined by lifetime measurements, we separate 2D-ACAR distributions for negatively charged and neutral arsenic vacancies in n-type GaAs. In electron-irradiated semi-insulating GaAs, we present 2D-ACAR results for the negatively charged gallium vacancy and for positron Rydberg states induced by gallium antisites. The 2D-ACAR for delocalized positrons, needed in the separation process, has been obtained from measurements on as-grown semi-insulating GaAs. Our results outline the capabilities of the 2D-ACAR technique when it is applied to the study of defects: the electronic structure in the vacancies are found to be well described by recent molecular dynamics calculations. The method also provides information about atomic relaxations around the vacancy sites, they are in agreement with the calculated relaxations. We conclude that the 2D-ACAR method is a promising tool to investigate defects in semiconductors
Protective effects of beta-carotene against ammonium sulfate toxicity: Biochemical and histopathological approach in mice Model
No full textAcar, Ali/0000-0001-8617-2206WOS: 000446677000001PubMed: 30300052In this study, the protective role of beta-carotene against ammonium sulfate-induced toxicity has been evaluated in Mus musculus var. albino mice, along with biochemical and histopathological parameters. Some biochemical parameters such as aspartate transaminase (AST), alanine transaminase (ALT), blood urea nitrogen (BUN), creatinine and oxidative stress parameters, malondialdehyde (MDA), and glutathione (GSH) levels in kidney and liver tissues were investigated. The mice were randomly divided into six groups. Group I received intraperitoneal injections of 0.9% NaCl; group II received orally administered 250 mg kg(-1) bw beta-carotene, group III received orally administered 500 mg kg(-1) bw beta-carotene; group IV received 320 mg kg(-1) bw ammonium sulfate; group V was given 250 mg kg(-1) bw beta-carotene +320 mg kg(-1) of bw ammonium sulfate; and group VI received orally administered 500 mg kg(-1) of bw beta-carotene +320 mg kg(-1) of bw ammonium sulfate. As a result, it was determined that the ammonium sulfate treatment causes significant changes in the biochemical and oxidative stress parameters and also in histological examinations. In group IV, significant increases in ALT, AST, BUN, MDA, and creatinine levels, and a significant decrease in GSH levels were observed compared with control group. In histopathological examinations, different pathological findings such as proteinaceous deposits, thickening of basement membrane, hyaline cast in kidney tissue and stellate cell, karyomegaly, and binucleated cells in liver tissue were observed. beta-carotene treatment in group V and VI ameliorated the elevated levels of liver enzymes and improved oxidative stress and histopathological findings, and so, it could be concluded that beta-carotene offered remarkable protection against ammonium sulfate-induced toxicity
Sur un nouveau Tyroglyphide (Trichotarsus manicati, n. sp.) [Acar.], parasite d' Anthidium manicatum L., et sur le genre Trichotarsus
No full textGiard Alfred. Sur un nouveau Tyroglyphide (Trichotarsus manicati, n. sp.) [Acar.], parasite d' Anthidium manicatum L., et sur le genre Trichotarsus. In: Bulletin de la Société entomologique de France, volume 5 (19),1900. pp. 375-377
Turkish teachers' social judgements on autism spectrum‐based exclusion in primary schools
No full textInclusive education has become a primary educational goal in many countries that aim to end the exclusion of students with different needs. However, we still know little about the perspectives of teachers regarding the exclusion of students with different needs. Given that background, the present study used semi‐structured clinical interviews to investigate Turkish pre‐service (N = 31, mean age = 20.02 years) and in‐service (N = 23, mean age = 40.88 years) teachers' judgements and justifications related to peer exclusion of students with autism spectrum disorder (ASD) and teachers' failure to include. Findings revealed that the context of exclusion has a significant effect on whether the teachers judged typically developing students' exclusion of their peers with ASD as acceptable. Teachers evaluated peer exclusion in the academic context as less acceptable than exclusion in the play context, citing more moral concerns. Further findings and implications for teacher education are discussed.WOS:0005553324000012-s2.0-85088964846Emerging Sources Citation IndexArticleAralıkYÖK - 2020-2
Staphylococcus aureus résistant à la méthicilline (SARM) d'origine animale et le danger pour l'homme. Conclusions
No full textAcar Jacques. Staphylococcus aureus résistant à la méthicilline (SARM) d'origine animale et le danger pour l'homme. Conclusions. In: Bulletin de l'Académie Vétérinaire de France tome 163 n°3, 2010. p. 281
Evaluation of short-term and long-term results of the ACAR-style bladder suture approach during uterus-sparing surgery and hysterectomy in cases of placenta percreta
No full textAbstract Purpose This study evaluated the short- and long-term results of ACAR-style bladder suturing performed during uterus-sparing surgery or hysterectomy in patients with placenta percreta and bladder invasion. Methods This retrospective cohort study included pregnant women who underwent a cesarean section at the University Gynecology and Obstetrics Clinic between January 2018 and March 2023, diagnosed with placenta percreta with bladder invasion, for which bladder dissection was not possible. In this study, patients with placenta percreta who underwent uterine-sparing surgery or subtotal hysterectomy received an ACAR-style bladder suture. We evaluated the intraoperative and postoperative morbidity and mortality in all cases. We questioned and recorded urinary symptoms such as stress or urge incontinence, nocturia, and urinary frequency during follow up. Results A total of thirty-eight patients were included in the study. The mean age of the pregnant women in the study was 37.4 ± 4.12 years. The average surgery time was 149.47 ± 65.57 min, the average hospital stay was 9.53 ± 8.66 days, the intraoperative transfusion rate was 65.8% (n = 25), and the postoperative transfusion rate was 47.4% (n = 18). The subtotal hysterectomy rate was 13.1% (n = 5). Evaluation of the post-operative urinary functions in these cases revealed an increase in complaints of urinary incontinence, nocturia, and urgency compared to the preoperative period. While the incontinence rate was 7.9% (n = 3) before, this rate increased to 31.6% (n = 12) after the bladder suture and this increase was statistically significant (p = 0.013). The rate of nocturia was 23.7% (n = 9) before the bladder suture and 50.0% (n = 19) after the bladder suture and this increase was statistically significant (p = 0.008). Conclusion In cases with bladder invasion and placenta percreata, cystostomy can be performed and bladder suture by ACAR method can be used as an alternative to bladder dissection and cystectomy
Fermi surfaces of high-<i>Tc</i> superconductors by positron 2D-ACAR
No full textWe review the work aimed at identifying the Fermi surface of high-Tc superconducting oxides using positron 2D-ACAR technique. We also present our recent observation of the pillbox in YBa2Cu3O7−δ and the first identification of Fermi surface signals in Nd2−xCexCuO4−δ obtained by 2D-ACAR
Weighted Approximation by New Bernstein-Chlodowsky-Gadjiev Operators
No full textAcar, Tuncer/0000-0003-0982-9459In the present paper, we introduce Bernstein-Chlodowsky-Gadjiev operators taking into consideration the polynomials introduced by Gadjiev and Ghorbanalizadeh [2]. The interval of convergence of the operators is a moved interval as polynomials given in [2] but grows as n -> infinity as in the classical Bernstein-Chlodowsky polynomials. Also their knots are shifted and depend on x. We firstly study weighted approximation properties of these operators and show that these operators are more efficient in weighted approximating to function having polynomial growth since these operators contain a factor b(n) tending to infinity. Secondly we calculate derivative of new Bernstein-Chlodowsky-Gadjiev operators and give a weighted approximation theorem in Lipchitz space for the derivatives of these operators.Scientific and Technological Research Council of TurkeyTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [112T548]The first author is supported by The Scientific and Technological Research Council of Turkey under Project No: 112T548
Sınıf III maloklüzyonun cerrahi düzeltiminde farklı maksillomandibuler hareketlerin üst havayolu anteroposterior boyutları üzerindeki etkilerinin karşılaştırılması
No full textAmaç: Sınıf 3 maloklüzyonun düzeltilmesi için farklı
bimaksiller cerrahi planların üst hava yolunun ön-arka boyutlarına
etkisini değerlendirmek.
Gereç ve Yöntem: Sınıf 3 düzeltimi için bimaksiller cerrahi
ile tedavi edilen 59 birey (ortalama yaş: 23.11±1.85 yıl) dahil
edildi. Ameliyat öncesi (T1) ve ameliyat sonrası (T2) lateral
sefalogramlar analiz edilerek kafa kaidesi üzerinde çakıştırıldı.
A ve B noktalarının yatay hareketlerinin miktarlarına göre 3
grup oluşturuldu. Grup-1: (n=21) B noktasının yer değiştirmesi
A noktasından büyüktü. Grup-2: (n=13) A ve B noktalarının
yer değiştirmeleri arasındaki fark ≤1mm idi. Grup-3: (n=25),
A noktasının yer değiştirmesi B noktasından büyüktü. Ön-arka
faringeal hava yolu boyutları (mm), arka (PAS), üst-arka (SPAS),
orta (MAS), alt (IAS), epiglottik (EAS) hava yolu boşluklarında
ölçüldü. Sınıf içi değerlendirme Paired sample t testi ve Wilcoxon
testi ile yapıldı. Sefalometrik değişiklikler için sınıflar arası
karşılaştırmalar ANOVA ve Tukey testi ile değerlendirilirken,
hava yolu değişiklikleri için Welch ANOVA ve Kruskal-Wallis
testleri yapıldı. Hava yolu parametrelerinin ikili karşılaştırmaları
Bonferroni düzeltmeli Mann-Whitney u-testi ile yapıldı. Birincil
yordayıcı ve sonuç değişkenleri arasındaki ilişkiyi değerlendirmek
için Pearson korelasyon analizi yapıldı.
Sonuçlar: Maksiller yükseklik, palatal düzlem, SNA, SNB,
ANB, Wits, N-Perp, maksiller derinlik toplam örnekte önemli
ölçüde değişti. Mandibular düzlemdeki ve SNB’deki değişiklikler
Grup-1’de daha yüksekti (p<0.05). SNA, N-PERP, maksiller
derinlikteki değişiklikler Grup-3’te daha yüksekti (p<0.05). Toplam
örnekte PAS (ortalama:2.44±2.21mm; medyan:2.17mm) ve SPAS
(ortalama:1.07±2.31mm; medyan:1.14mm) oldukça anlamlı
artış gösterdi. Grup-1’de İAS anlamlı olarak azaldı (ortalama:
– 1,98±3,68 mm; ortanca: – 1,36 mm). Grup-2’de önemli bir
faringeal değişiklik yoktu. Grup-3’te PAS (ortalama:3.03±2.20mm,
ortanca:2.63mm) ve SPAS (ortalama:1.64±1.81mm, ortanca:
1,74mm) anlamlı olarak arttı. Toplam örnek, PAS ve SNA arasında
(r=0.335); ve IAS ve B noktası arasında (r=0.275) anlamlı pozitif
doğrusal zayıf ilişki ortaya koydu. Grup-3’te PAS ve SNA ölçümleri
arasında anlamlı pozitif doğrusal orta ilişki vardı (r=0.613).
Sonuç: Farklı kombinasyonlardaki maksillomandibular
hareketler üst hava yolunun ön-arka boyutları üzerinde belirgin
olarak farklı etkiler göstermiştir. Klinisyenler, hava yolu üzerindeki
etkilerini göz önünde bulundurarak ameliyat planlamasını dikkatli
bir şekilde yapmalıdır.Objective: To evaluate the effect of different surgery plans on
anteroposterior dimensions of upper airway in bimaxillary surgery
for correction of Class III malocclusion.
Materials and Methods: 59 subjects (mean age:
23.11±1.85years) treated with bimaxillary surgery for Class III
correction were included. Preoperative (T1) and postoperative
(T2) lateral cephalograms were traced and superimposed. 3 groups
were formed according to different relative horizontal movements
of A and B-points. Group-1: (n=21) displacement of B-point
was greater than A-point. Group-2: (n=13) difference between
displacements of A and B-points were ≤1mm. Group-3: (n=25),
displacement of A-point was greater than B-point. Anteroposterior
pharyngeal airway dimensions(mm) were measured at posterior(PAS), superoposterior(SPAS), middle(MAS),
inferior(IAS), epiglottic(EAS) airway spaces. Intraclass evaluation
was performed with Paired sample t-test and Wilcoxon’s test.
Interclass comparisons were evaluated with ANOVA and Tukey
test for cephalometric changes while Welch ANOVA and KruskalWallis tests were performed for airway changes. Pairwise
comparisons of airway parameters were made with Mann-Whitney
u-test with Bonferroni correction. Pearson correlation analysis was
performed to evaluate relationship between primary predictor and
outcome variables.
Results: Maxillary-height, palatal-plane, SNA, SNB,
ANB, Wits, N-Perp, maxillary-depth changed significantly
in total sample. Changes in Mandibular-plane and SNB were
higher in Group-1 (p<0.05). Changes in SNA, N-PERP,
maxillary-depth were higher in Group-3 (p<0.05). In total
sample, PAS (mean:2.44±2.21mm; median:2.17mm) and SPAS
(mean:1.07±2.31mm; median:1.14mm) showed highly significant
increase. In Group-1, IAS decreased significantly (mean:-
1.98±3.68mm; median:-1.36mm). Group-2 had no significant
pharyngeal changes. In Group-3, PAS (mean:3.03±2.20mm,
median:2.63mm) and SPAS (mean:1.64±1.81mm, median:
1,74mm) increased significantly. Total sample revealed significant
positive linear weak relationship between PAS and SNA (r=0.335);
and between IAS and B-point (r=0.275). Group-3 had significant
positive linear moderate relationship existed between PAS and
SNA measurements (r=0.613).
Conclusion: Differential maxillomandibular movements
showed distinctly different effects on anteroposterior dimensions
of upper airway. Clinicians should prepare surgery planning
carefully, considering its effects on the airway
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