Midhat Paşa

Taha Toros Arşivi, Dosya No: 106-Midhat Paşa. Not: Gazetenin "Günün Tarihi" köşesinde yayımlanmıştır

Yeşil Gece'nin dil yapısı

Taha Toros Arşivi, Dosya No: 95-Reşat Nuri Günteki

ASSOCIATION BETWEEN MANDIBULAR CANAL COURSE AND INTERFORAMINAL AREA IN PANORAMIC RADIOGRAPHS FOR IMPLANT PLACEMENT

ABSTRACT Objective: The aim of this study was to evaluate the relationship of mandibular canal course with mental foramen localization on edentulous patients’ for implant placement. Material and Methods: This retrospective study was carried out on the panoramic radiographs of 788 edentulous patients. Horizontal measurements L (left mental foramen to the left mandibular ramus), R (right mental foramens to the right mandibular ramus), M (between the mental foramens) and vertical measurements D1 (mental foramen’s inferior border to the mandibular basis), D2 (mental foramen’s superior border to the alveolar crest) were digitally evaluated. Mandibular canals were classified into two types as linear and elliptic. Analysis of demographic data and correlations between canal course and linear measurements were carried out. Kolmogorov-Smirnov and Shapiro Wilks tests, Kruskal Wallis test, and Chi-squared test was used to compare the qualitative data (p <0.05). Results: There was a statistically significant difference between the D1/D2 mean values and the canal course according to the age groups. The rate of the elliptic canal course in the men (41.6%) was significantly higher than that in the women (26.6%). There was no statistically significant difference between the mean D1/D2, (R + L)/M and L/M values according to the canal course. Conclusions: Both elliptical and linear canal courses do not affect the interforaminal distances, resulting ineffective in the anteroposterior spread of implants in cases of interforaminal implant placement. Key Words: Mandibular canal, canal course, interforaminal area, canal anatomy, implant. ÖZET Amaç: Bu çalışmanın amacı dişsiz hastalarda implant uygulaması için mandibular kanal seyri ve mental foramen konumunun ilişkisinin değerlendirilmesidir. Gereç ve Yöntemler: Bu retrospektif çalışma 788 dişsiz hastanın panoramik radyografileri ile yürütülmüştür. Ölçümler horizontal ve vertikal şeklinde dijital olarak yapılmıştır. L (sol mental foramen ile sol ramus arası mesafe), R (sağ mental foramen ile sağ ramus arası mesafe), M (mental foramenler arası mesafe) horizontal ölçümler; D1 (mental foramenin alt sınırı ile basis mandibular arası mesafe) ve D2 (mental foramenin üst sınırı ile alveol kret tepesi arası mesafe) ise vertikal ölçümlerdir. Mandibular kanal seyri doğrusal ve eliptik olarak iki sınıfta incelenmiştir. Demografik veriler, kanal seyri ve dijital ölçümler arası ilişki değerlendirilmiştir. Kolmogorov-Smirnov ve Shapiro Wilks testleri, Kruskal Wallis testi, ve Ki-Kare testi niteliksel verilerin karşılaştırılmasında kullanılmıştır (p <0,05). Bulgular: Yaş grupları arasında D1/D2 oranları ve kanal seyri açısından istatsitiksel olarak anlamlı farklılık tespit edilmiştir. Kanal seyrinin eliptik görülme oranı erkeklerde (%41,6) kadınlardan (%26,6) anlamlı derecede yüksek bulunmuştur. Kanal seyrine gore D1/D2, (R+L)/M ve L/M ortalamaları açısından istatistiksel olarak anlamlı farklılık yoktur. Sonuç: Eliptik ve doğrusal kanal seyrinin interforaminal mesafeye herhangi bir etkisi yoktur, bu durum antero-posterior yönde interforaminal aralığa implant yerleştirilmesini etkilememktedir. Anahtar Kelimeler: Mandibular kanal, kanal seyri, interforaminal bölge, kanal anatomisi, implant

Effect of thermal treatment and storage on bioactive compounds, organic acids and antioxidant activity of baobab fruit (Adansonia digitata) pulp from Malawi

Bioactive compounds of baobab (Adansonia digitata) pulp from Malawi were investigated. The effect of thermal treatment and storage on selected quality attributes of the juice was also evaluated. Organic compounds were analysed by HPLC; total phenol content (TPC) and total antioxidant activity (FRAP, ABTS and DPPH) were measured by spectrophotometry. Malawi baobab pulp contains high levels of procyanidin B2 (533 ± 22.6 mg/100 g FW), vitamin C (AA + DHA) (466 ± 2.5 mg/100 g FW), gallic acid (68.5 ± 12.4 mg/100 g FW) and (−)-epicatechin (43.0 ± 3.0 mg/100 g FW) and showed a maximum TPC of 1.89 × 103 ± 1.61 mg GAE/100 g FW. The maximum antioxidant activity was 2.81 × 103 ± 92.8 mg TEAC/100 g FW for FRAP, 1.52 × 103 ± 17.1 mg TEAC/100 g FW for ABTS and 50.9 ± 0.43% DPPH for DPPH. Thermal pasteurisation (72 °C, 15 s) retained vitamin C which further showed extended half-life under refrigeration temperature (6 °C). Procyanidin B2, (−)-epicatechin, TPC and antioxidant activity fluctuated during storage. Antioxidant activity was significantly correlated (p ≤ 0.05) with bioactive compounds and TPC

The Synthesis of Styrene-Oligoester Copolymer and Investigation of Their Physico-mechanical Properties

The copolymerization reaction of commercial propylene oxide with glycidylmethacrilate in the presence of BF3·O(C2H5)2 catalyst have been investigated. The composition and structure of copolymerization products and anchored functional groups have been determined using IR and gel chromatographic methods. The physico-mechanical properties and utility of polyfunctional unsaturated oligoester were investigated. The obtained thermoset product via the reaction of the oligoester with both styrene and oligostyrene obtained from the bottom of column as a waste material during the rectification operation of styrene in the presence of radicalic initiator has a good adhesion capability, hardness and high heat and water resistance. Thus the waste material was converted to the high valuable polymeric material

Kinetics of ascorbic acid degradation in fruit-based infant foods during storage

The kinetics of ascorbic acid (AA) degradation in a fruit-based beikost product added with AA were determined after storage at 4, 25, 37 and 50 °C during 4, 8, 12, 16 and 32 weeks in plastic polypropylene/ethylenevinyl alcohol vacuum packaging. It was confirmed that AA degradation followed an Arrhenius first-order kinetics, with an activation energy of 20.11 ± 0.33 kcal mol−1. No AA losses at 4 °C were recorded during the entire storage period. In contrast, a time - and temperature - dependent decrease (p the degradation rate decreasing from 50 °C to 25 °C, as expected. AA percentage retention at the end of storage ranged between 6.4% (50 °C/16 weeks) and 100.9% (4 °C/32 weeks)