The purpose of this study was to evaluate mineral content of root canal dentin after treatment with different antibiotic pastes including the mixture of metronidazole, ciprofloxacin, doxycycline, cefaclor, amoxicillin, or minocycline. Fifty extracted maxillary canine teeth were randomly divided into five groups (n = 10 teeth for each group). Root canals were prepared Reciproc rotary files. Canals were irrigated using 5 ml 5% NaOCl and 1 ml 15% EDTA. Each tooth in all groups were longitudinally splitted into two pieces as a control and experimental samples. Each experimental group received following antibiotic paste; double antibiotic paste (DAP) and triple antibiotic paste with doxycycline (TAPd), TAP with cefaclor (TAPc), TAP with amoxicillin (TAPa), and TAP with minocycline (TAPm) for 21 days. The Ca, P, Mg, Ca, and K levels, and the Ca/P ratio was analyzed by a scanning electron microscope (SEM) equipped using a Bruker energydispersive X-Ray (EDX) detector. Data were analyzed with independent samples t-test, one-way ANOVA, and Duncan tests. Ca and Ca/P ratio showed a statistically significant increase TAP with amoxicillin and cefaclor (p < .05). DAP, TAPd, and TAPm did not change the mineral levels (p > .05). TAPa and TAPc with increased the Ca level and Ca/P ratio of the root canal dentin which consequently positively influences the revascularization process.

Pyrolytic degradation behavior of peach and sour cherry seed were investigated by thermal analysis techniques such as thermogravimetric (TG) and derivative thermogravimetric (DTG). Pyrolysis study of peach and sour cherry seed, which are the sources of plant biomass, were carried out under air flowrate of 10 mL.min -1 and heating rates of 2.5,5,10 and 20 K min -1 in the temperature range of 298-1173 K by means of thermal analysis techniques. The activation energy and pre-exponential factor were determined with different methods as Kissinger-Akahira-Sunose (KAS) and Flyn-Wall-Ozawa (FWO). Although the FWO method gives higher values, it was observed that all activation energy values calculated by both methods are compatible with each other. In addition, as the amount of volatile matter increases, the decomposition becomes difficult due to the increase in mass transfer resistance and pressure, so it was determined that the activation energy of the peach seed is higher than the sour cherry seed.

Background: Turkey is approximately 72% of the world’s boron sources. Colemanite, tincal, ulexite and pandermite are among the most significant in Turkey. Boron compounds and minerals are widely used in many industrial fields. <p> Objective: The main purpose of this study was to investigate the control of impurities in the boric acid production process using colemanite by carrying out the reaction with a mixture of CO 2 and SO 2 - water, and determining the appropriate process conditions to develop a new process as an alternative to the use of sulfuric acid. Due to worrying environmental problems, intensive studies are being carried out globally to reduce the amount of CO 2 and SO 2 gases released to the atmosphere. <p> Method: The Taguchi method is an experimental design method that minimizes the product and process variability by selecting the most appropriate combination of the levels of controllable factors compared to uncontrollable factors <p> Result: It was evaluated the effects of parameters such as reaction temperature, solid-to liquid ratio, SO 2 /CO 2 gas flow rate, particle size, stirring speed and reaction time. The optimum conditions determined to be reaction temperature of 45°C; a solid–liquid ratio of 0.083 g.mL −1 ; an SO 2 /CO 2 ratio of 2/2 mL.s −1 ; a particle size of -0.354+0 .210 mm; a mixing speed of 750 rpm and a reaction time of 20 min. <p> Conclusion: Under optimum operating conditions, 96.8% of colemanite was dissolved. It is thought that the industrial application of this study will have positive effects on the greenhouse effect by contributing to the reduction of CO 2 and SO 2 emissions that cause global warming. <p>