Nowadays, whitening of stained teeth has become the most popular topic in aesthetic and cosmetic dentistry. Because of the side effects of materials that were used for bleaching, in this study the effects of some plants which were used in Anatolian folk medicine on the treatment of tooth staining were examined. In this study, upper central incisors which were extracted for periodontal reasons were used. The colour values of numbered teeth were obtained and the teeth were immersed into three different essential oils of medicinal plants (Mentha piperita, Ocimum basilicum, Rosmarinus officinalis, Salvia officinalis) for different time periods (1 day, 1 week, 1 month). At the end of the immersion periods, colour measurements of all samples were made and the colour changes were analysed. Obtained data were statistically analysed by using ANOVA and Duncan test. As a result of the variance analysis, plant species and the duration of immersion was found to be statistically significant. Within the limits of this study, we can indicate that tested medicinal plants has a whitening effect by resulting significant change in tooth colour.

In honey bee (Apis mellifera L.), aggression and aggressive behavior occur due to many reasons and the most important one is the genotype. However, regardless of genotype, a bee colony can have different levels of aggression at different times. If the bee’s aggression is not due to racial characteristics, this may indicate some problems in the colony. One of the most important reasons is the absence of queen bees in the colony, and the other is that the amount of nutrients in the hive has decreased to a critical level. Some other environmental effects are effective on bees’ aggression and aggressive behavior. In this study, the determination of the relationships between the aggression of four different honey bee genotypes (Carniolan, Caucasian, Black Sea and Muğla) in Samsun province in two different months (July, August) at different times of the day (09:00-13:00-17:00) was intended. For this purpose, a Log-linear model analysis was made. According to the findings, genotype, month and time, which are the main effects, and genotype × month interaction among the second-order interactions were found to be statistically significant, while genotype * hour and month × hour interactions were not significant. In Samsun province, it was determined that the Carniolan genotype was 7.846 times less, the Caucasian genotype 3.991 times and the Black Sea genotype 3.888 times less aggressive than the Muğla genotype. In addition, it was determined that the aggression in July was 1.185 times less than in August, and they were less aggressive in the daytime than in the evening and morning hours. It was determined that the Carniolan genotype was 2.04 times less aggressive than the Muğla genotype in July. Before and after the nectar flow seasons, studies to determine the aggression for all genotypes suitable for the regions will be a good source of information for beekeepers and researchers.

In semi-arid regions, unfavorable weather conditions are the most important limiting factors for seed germination. The imbibed or germinating seeds in soil can be dried by hot and dry weather. Thus, seeds can largely lose their germination abilities until the next water uptake (called as ‘alatav’ in Turkish). Before drying, the time of the first water uptake by a seed may be more effective on seed viability at the second water uptake for germination. Therefore, this experiment was conducted to identify the first water uptake rates (WU) of seeds of three bread wheat genotypes (Bezotaja, Kirac and 13-BVD-4) per hour during 50 hours and their germination rates (GR) at the second water uptake after drying the seeds for 3-week in laboratory conditions. The results presented here indicated that the WU and GR were significantly affected by genotypes, imbibition time (T) and their interaction (1% probability level). There was also a significant negative correlation between the WU and GR (r** = –0.9295) at all times studied. Furthermore, the germination ability of Kirac lasted longest (for 38th hour) when the WU reached to 160.24%, and it was followed by Bezostaya and 13-BVD-4 genotypes (63.34% at 37th hour and 152.58% 34th hour, respectively).

Coconut shell extract contains phytochemical compounds tannins, saponins and steroids which are thought to act as antimicrobial compounds. This makes coconut shell extract has great potential as a natural preservative, one of which is the natural preservative coconut sap. This study aims to know the effect of coconut shell type, extraction time, extraction temperature and the combination of the three treatments on the antimicrobial activity and phytochemical extracts produced. This study using a Randomized Block Design (RBD). The factors tested were coconut shell type consisting of: fresh old coconut shell; dry old coconut shell; fresh young coconut shell; dry young coconut shell; length of extraction time consisting of: 3 and 5 hours’ extraction time, and extraction temperature consisting of: 28°C and 70°C. The variables observed in this study include microbiological and phytochemical variables. The results showed that all type of coconut shell extract contains phytochemical compounds such as tannin, saponins, and some samples contain steroid compounds and had the ability of antimicrobial activity, especially in the bacterium A.aceti. The combination of a dry old shell with an extraction time of 3 hours and extraction temperature of 28°C has the highest antimicrobial activity against A.aceti bacteria with inhibition zone diameter of 13.25 mm, positive containing phytochemical compounds tannins, saponins and steroids and contains total phenol levels of 18.67 mg/100g.