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Öğe The Effect of the Leg and Back Strength of the Serve and Tennis Players to the Serve Throwing Speed and Agility(Sergii Iermakov, 2018-09-30) Kaya, Mustafa; Soyal, Mehmet; Karakuş, MustafaThe aim of this study was to examine the effect of leg and back strength on serve throwing speed and agility of 19- 23 year old male tennis players who are studying at university. Material: Twelve male tennis players, aged between 19 and 23, who were studying at university in Kayseri participated in the study voluntarily. Individuals who played tennis for at least 5 days per week participated in the study and leg and back strength measurements and their relation with the serve and agility were compared. Results: In the study, leg strength test, back strength test, agility test and serve throwing speed tests were applied to the subjects. These tests reveal a significant relation between back strength and serve throwing speed (R=,660, R2=,435; p< ,050). When the t-test results on the significance of the regression coefficient are examined, it is seen that back strength level (t=2,774, p = ,024) affects serve throwing speed and explains approximately 43% of the total variance. There is a significant relation between leg strength and serve throwing speed (R=,586, R2=,343; p<, 050). When the t-test results on the significance of the regression coefficient are examined, it is seen that leg strength level affects serve throwing speed and it explains approximately 34% of the total variance. Conclusions: As a consequence, it has been revealed that leg strength and back strength in tennis players have a statistical relationship with agility and serve throwing speed. For this reason, it is considered necessary to apply training programs to improve leg and back strength in trainings.Öğe Examining the Impact of Musculus Palmaris Longus on Serve Speed and on Certain Motoric Properties in Tennis Players(IERMAKOV S S, BOX 11135, KHARKOV-68, 61068, UKRAINE, 2019) Soyal, Mehmet; Kaya, Mustafa; Çelik, Nuri MuhammetPurpose: The aim of this study is to examine the impacts of existence or absence of musculus palmaris longus (MPL) on serve speed and certain motoric properties in the tennis players. Material: In the study, 25 male volunteers participated, who are playing tennis at university level and in whom the existence of musculus palmaris longus was checked. The ages of volunteers, who participate in tennis activities under licenses, vary between 18 and 25 and they have no disability or illness in the upper extremity. The experimental group (n=7) is comprised of individuals, who do not have musculus palmaris longus, while the control group (n=18) is comprised of individuals having musculus palmaris longus. Results: The age averages of the groups participating in the study was 21, 89 +/- 2, 246 years old for the group with musculus palmaris longus, while it was 22, 00 +/- 2, 517 years old for the participants without the musculus palmaris longus; as per their average height, it was 174, 94 +/- 5, 713 cm for the group with the musculus palmaris longus, while it was 174, 71 +/- 3, 546 cm for the participants without the musculus palmaris longus; the body weight average was 70, 83 +/- 5, 79 kg for the participants with musculus palmaris longus, while it was 72, 14 +/- 4, 059 kg for the participants without the musculus palmaris longus; sports-age average was 13, 00 +/- 1, 645 years for the ones with musculus palmaris longus, while it was 12, 29 +/- 1, 380 years for the participants without musculus palmaris longus. It was determined that there was statistically significant difference for the serve speed (p<0, 001) and the hand flexion strength (p<0, 05) parameters of the participants; however, there was statistically no significant difference (p>0, 05) in other parameters. Conclusions: As the conclusion, existence of musculus palmaris longus in tennis players positively influences the hand wrist flexion strength, however, it negatively influences the serve speed.Öğe Examining the relationship between joint range of motion and serve speed and hit(IERMAKOV S S, BOX 11135, KHARKOV-68 61068, UKRAINE, 2019) Soyal, Mehmet; Kaya, Mustafa; Çelik, Nuri MuhammetPurpose: In this study, the relationship between the joint range of motion, and the serve speed and hit rate of tennis players was examined. The voluntary participants of this study are tennis players in the university tennis team. Material: Twelve male students aged 18-25 voluntarily participated in the study. Participants were individuals, who professionally played tennis with a license. Certain parameters of the participants such as the upper extremity joint range of motion, extension and flexion angles of the elbow joint, abduction angle of the shoulder joint, and flexion and extension angles of the wrist were measured through standard plastic 12 goniometers. Similarly, the hit values were examined via the Revised Dyer Wall Test and serve speed values were examined by using the Stalker solo 2 brand radar. Pearson correlation analysis was used to examine the relationship between the joint range of motion and the serve speed and hit rate of the participants. The values below p <0.05 were considered as significant. Results: In the study, it was determined that there was a moderate positive correlation between wall test and shoulder abduction (p <0.05, r =.599); similarly, there was a high positive correlation between wall test and wrist extension (p <0.05, r = 671); there was a high positive correlation between wall test and wrist flexion (p <0.05, r = 638); there was a high positive correlation between abduction of the shoulder and wrist extension (p <0.05, r =, 603); there was a very high positive correlation between wrist extension and wrist flexion (p <0.001, r = 819), and it was determined that there was no significant relationship between the other parameters (p> 0.05). Conclusions: In conclusion, in this study, it was determined that the joint range of motion has a positive relationship with both serve speed and hits.Öğe Mineralogical, petrological, and geochemical characteristics of Senkaya Chrysoprase, Turkey(Tubitak Scientific & Technological Research Council Turkey, 2022) Selim, H. Haluk; Guctekin, Aykut; Sahin, Ferhan; Kaya, Mustafa; Tanc Kaya, Beril; Guner, Elanur; Tas, K. OmerSenkaya chrysoprase is a gemstone and can be found near the Turnali village located in the west-northwest of Senkaya (Erzurum) county in the uplifted Kirdag of Northeast Anatolia of Turkey. Chrysoprase only found in Senkaya County and known with the same name commercially in Turkey is a light-dark green and cryptocrystalline structure gemstone encountered in the Orukyayla Melange. Samples were collected from the field for defining mineralogical-petrographical, XRD, XRF, ICP-MS, optical cathodoluminescence microscopy (OCLM), FTIR-Raman and stable isotopic properties of Senkaya chrysoprase. According to mineralogical and petrographic examination, Senkaya chrysoprase has generally heterogeneous color distribution in macroscale and has 5 Mohs mineral hardness. Microquartz filling (10%-15%) was seen in the microexamination with serpentine as main component with partly massive opal type silica. The XRF analyses indicate that many samples had high SiO2 values (91.45-94.38 wt%). As a result of trace elements, rare earth elements, Au-Pt group analyses using ICP-MS, Ni (167-387 ppm) and Co (12.57-74.78 ppm) values are quite remarkable. In the OCLM studies, few metallic minerals which could produce CL and could spread CL in different colors due to some trace activator elements were observed. Oxygen isotopic (delta O-18(V-SMOW)) values obtained from three chrysoprase samples are 24.8 parts per thousand, 27.7 parts per thousand and 30.63 parts per thousand, respectively and mean formation temperature is 96-99 degrees C.Öğe Mineralogical, petrological, and geochemical characteristics of Şenkaya Chrysoprase, Turkey(TÜBİTAK, 2022) Selim, Hamit Haluk; Güçtekin, Aykut; Şahin, Ferhan; Kaya, Mustafa; Tanç Kaya, Beril; Güner, Elanur; Taş, Kamil Ömer; Karakaş, Ahmet; Kantarçeken, YaseminŞenkaya chrysoprase is a gemstone and can be found near the Turnalı village located in the west-northwest of Şenkaya (Erzurum) county in the uplifted Kırdağ of Northeast Anatolia of Turkey. Chrysoprase only found in Şenkaya County and known with the same name commercially in Turkey is a light-dark green and cryptocrystalline structure gemstone encountered in the Örükyayla Mélange. Samples were collected from the field for defining mineralogical-petrographical, XRD, XRF, ICP-MS, optical cathodoluminescence microscopy (OCLM), FTIR-Raman and stable isotopic properties of Şenkaya chrysoprase. According to mineralogical and petrographic examination, Şenkaya chrysoprase has generally heterogeneous color distribution in macroscale and has 5 Mohs mineral hardness. Microquartz filling (10%–15%) was seen in the microexamination with serpentine as main component with partly massive opal type silica. The XRF analyses indicate that many samples had high SiO2 values (91.45–94.38 wt%). As a result of trace elements, rare earth elements, Au-Pt group analyses using ICP-MS, Ni (167–387 ppm) and Co (12.57–74.78 ppm) values are quite remarkable. In the OCLM studies, few metallic minerals which could produce CL and could spread CL in different colors due to some trace activator elements were observed. Oxygen isotopic (?18OV-SMOW) values obtained from three chrysoprase samples are 24.8‰, 27.7‰ and 30.63‰, respectively and mean formation temperature is 96–99 o C.Öğe Tissue Thiol Concentration in High-Grade Gliomas: Is There any Association Between IDH1 Mutation Presence and Tumoral Cellular Antioxidant Defense?(Turkish Neurosurgical Soc, 2021) Evran, Sevket; Kayhan, Ahmet; Baran, Oguz; Cevik, Serdar; Katar, Salim; Kaya, Mustafa; Sonmez, DeryaAIM: To assess and compare the antioxidant capacities of high-grade gliomas (HGG) according to their grades and the presence of isocitrate dehydrogenase 1 (IDH1) mutation using tissue thiol level measurement. MATERIAL and METHODS: Tissue thiol concentrations were measured in 41 HGG samples and 21 healthy brain tissues obtained from autopsy procedures, which were performed within the first 4 hours of death. All samples were stored at -80 degrees C, and a thiol quantification kit was used in evaluating tissue thiol levels. The Number Cruncher Statistical System was used for statistical analyses to detect the differences between the control group and the HGG group, which was also divided into subgroups according to their grade and IDH1 mutation presence. RESULTS: The tissue thiol levels of HGGs were found to be higher than the control group (p=0.001). Although the median thiol levels of Grade 4 gliomas were higher than those of Grade 3, no statistically significant difference was noted (p=0.076). When all tumors were compared according to the IDH1 mutation presence, IDH1-negative (IDH1-) HGGs had higher thiol contents than IDH1 mutant (IDH1+) HGGs (p=0.001). The thiol levels of Grade 4 IDH1- gliomas were statistically significantly higher than of Grade 3 gliomas (p=0.023), but no statistically significant difference between the thiol levels of Grade 3 and Grade 4 IDH1+ tumors was noted (p=0.459). CONCLUSION: We have demonstrated the higher thiol concentrations of HGGs, particularly IDH1- ones. The sulfhydryl contents of gliomas as an indicator of tumoral antioxidant capacity may be responsible for the treatment resistance of IDH1- gliomas, the mechanism of which is not clear. Thiols can be a novel target for treatment, considering the unsatisfactory results of current modalities for HGGs.
