Browsing by Author "Yildirim, B."

Now showing 1 - 11 of 11

Chemical Composition and Antibacterial Activities of Juniperus Horizontalis Essential Oil
(Canadian Science Publishing, Nrc Research Press, 2014) Eryigit, T.; Okut, N.; Ekici, K.; Yildirim, B.
In recent years, the screening of antibacterial activity has been the subject of much research, and the antibacterial activity of essential oils could be a promising subject for future investigation. In this study, the antibacterial activities of Juniperus horizontalis essential oils and their components were investigated. Essential oils were isolated using the hydro-distillation method and their components were analyzed by gas chromatography-mass spectrometry (GC-MS). The main compounds found in the oil of leaves were linalool (33.76%), P-cymene (23.20%), gamma-terpinene (8.67%), trans-sabinene hydrate (8.59%), thyme camphor (8.49%), carvol (5.08%) and borneol (4.22%). Juniperus horizontalis essential oils were evaluated for antibacterial activity against six bacterial strains using the disc diffusion method. The results indicate that the essential oil of J. horizontalis shows variable and significant antibacterial activities against the six tested bacteria species. The diameters of the inhibition zones formed for bacteria were measured. The lowest inhibition zone was 12 mm (sensitive) against Pseudomonas aeruginosa ATCC 10145 and the highest zone was 32 mm (extremely sensitive) against Enterococcus faecalis ATCC 29212.
Chemical Composition and Antibacterial Activities of Juniperus Horizontalis Essential Oil (Vol 94, Pg 323, 2014)
(Canadian Science Publishing, Nrc Research Press, 2018) Eryigit, T.; Okut, N.; Ekici, K.; Yildirim, B.
Chemical Constituents and Antibacterial Activities of Essential Oils of Common Mugwort (Artemisia Vulgaris L.) From Eastern Anatolia Flora
(Vallecchi Editore, 2016) Yildirim, B.; Kumlay, A.M.; Ekici, K.; Rezaeieh, K.A.P.
The essential oil components of common mugwort (Artemisia vulgaris L.) and their antibacterial activity were analyzed in the present study. Aerial parts of A. vulgaris plants were collected from natural habitats from Van region of Turkey. Essential oils were isolated using the hydro-distillation method and their components were analyzed by gas chromatography-mass spectrometry (GC-MS). The major components found in essential oil of common mugwort were thujone (60.28%), caryophyllene oxide (11.46%), α-Thujone (9.46%), 1.8 cineole (5.06%), trans-caryophyllene (3.57) and linalool (3.40%). Antibacterial activity of the essential oil was designated against six microorganisms using the disc diffusion method. Essential oils of A. vulgaris extracts were screened for antibacterial activity against three gram-negative (Pseudomonas aeruginosa, Salmonella typhimurium and Escherichia coli) and three gram-positive bacteria (Staphylococcus aureus, Bacillus subtilis and Enterecoccus faecalis). The results illustrated that the essential oils of common mugwort were sensitive; inhibition zones differed to various bacteria such as Escherichia coli ATCC 11775 (14-14 mm), Salmonella typhimurium ATCC 25241 (13-14 mm), Enterecoccus faecalis ATCC 29212 (12-13 mm), Bacillus subtilis ATCC 6051 (12-12 mm), Pseudomonas aeruginosa ATCC 10145 (11-11 mm) and Staphylococcus aureus ATCC 12600 (10-11 mm). The presented results may open new avenues for the development of new phytotherapeutic products from the common mugwort plant species.
Determination of Physiological and Biochemical Reactions of Different Pea Varieties and Lines Under Chilling Stress
(Scibulcom Ltd, 2016) Togay, Y.; Yasar, F.; Togay, N.; Yildirim, B.; Uzal, O.
Under field conditions, growth parametres like fresh weight and leaf number, superoxide dismutase (SOD), catalase (CAT), ascorbic peroxidase (APX) enzymes in the antioxidant defence sytems are analysed on 12 lines and two cultivars of pea seedlings which are specified as tolerant against cold. Besides the relationship between the protection mechanisms from abiotic stress conditions (change on the antioxidant enzymes) on the pea plant is tried to be revealed. In terms of macro and microelement accumulation, considering control plants, the effect of low temperature application is not observed in Mn, Mg, Cu microelements. However, approximately ten times decrease is observed on Fe and Zn accumulations. It is also observed that there is not a change on K and Ca accumulation of the plants considering control plants. It is seen that with the low temperature application, there are significant increases on CAT, APX and SOD enzyme activities which are among the antioxidant enzymes of the plants.
The Effects of Maxicrop Leaf Fertilizer on the Yield and Quality of Soybean (Glycine Max L. Merril)
(Academic Journals, 2008) Yildirim, B.; Okut, N.; Türközü, D.; Terzioǧlu, Ö.; Tunçtürk, M.
The aim of this study which was conducted in the summer of 2001 on the trial fields of Van YYU (Yüzüncü Yil University) was to determine the effects of Maxicrop leaf fertilizer, applied on Beason soybean at various stages, on the yield and yield components. Maxicrop doses of 500, 1000 and 1500 g.ha-1 per hectare were applied at three different stages of the plant (seed stage, four-leaf stage and "beginning of blooming" stage). The highest plant height was achieved as 32.98 cm on average from 2000 g.ha-1 dose. No difference was recorded between the applications in terms of 1000 seed weight. The values of 1000 seed weight varied between 134.25-144.25 g on average. Application doses lead to an increase in seed yield. The highest seed yield value was achieved as 1265.7 kg. ha-1 from 2000 g.ha-1 dose while the lowest seed yield was achieved as 997.3 kg. ha-1 from the control dose. © 2008 Academic Journals.
The Effects of Varying Phosphorus Doses on Yield and Some Yield Components of Black Cumin (Nigella Sativa L.)
(2011) Tuncturk, M.; Tuncturk, R.; Yildirim, B.
This study was carried out to determine the effects of different phosphorus doses (0, 20 and 40 kg/ha) on yield and some yield components of black cumin (Nigella sativa L.) in Van ecological conditions in 2006 and 2007. Field trials were designed by Completely Randomized Block Design with three replications at the experimental fields of Agricultural Faculty of Yuzuncu Yi{dotless}l University. In the study, plant height (cm), the number of branch (branch/plant), the number of capsule (capsule/plant), the number of seeds in the capsule (seed/capsule), thousand-seed weight (g) and seed yield (kg/ha) were determined. According to statistical analysis, significant differences were determined among the phosphorus doses applications for the number of capsule, thousand-seed weight and seed yield. Seed yield increased by increasing phosphorus doses. According to the results, the highest seed yield (597 kg/ha) and thousand-seed weight (2.48 g) were obtained from 40 kg P/ha fertilizer application. The highest mean values for the number of capsule (5.68 capsule/plant) resulted in 20 kg P/ha application.
Histological Comparison of Healing Following Tooth Extraction With Ridge Preservation Using Enamel Matrix Derivatives Versus Bio-Oss Collagen: a Pilot Study
(Churchill Livingstone, 2013) Alkan, E. A.; Parlar, A.; Yildirim, B.; Senguven, B.
The goal of the present clinical study was to evaluate new bone formation in human extraction sockets augmented with enamel matrix derivatives (EMD) and Bio-Oss Collagen. Patients with symmetrical single-rooted teeth in the bilateral quadrants of the upper jaw condemned for extraction participated in this study. Following extraction, the sockets (20 sockets) were randomly augmented using either EMD or Bio-Oss Collagen. After 3 months of healing, bone biopsies were obtained and prepared for histological analyses. Dental implants were then placed. Implant stability quotient (ISQ) readings were obtained for each implant at the time of surgery and at 1 and 3 months postoperatively. The mean new bone formation was 34.57 +/- 25.67% in the EMD sites and 28.80 +/- 16.14% in the Bio-Oss Collagen sites. There was no significant difference between the groups. The ISQ values were significantly higher for the implants placed in the EMD sites at the first and third months, but no significant differences were observed in the ISQ values for the implants placed in the Bio-Oss Collagen sites. The augmentation of the extraction sockets with EMD or Bio-Oss Collagen leads to similar behaviour in bone regeneration.
Identification of Chemical Composition and Antibacterial Properties Juniperus Oxycedrus L. Subsp. Oxycedrus Leaf Essential Oil
(Centenary University, 2018) Okut, N.; Yildirim, B.; Ekici, K.; Terzioğlu, Ö.; Özgökçe, F.
The constituents of leaf essential oil of Juniperus oxycedrus L. subsp. oxycedrus (JOO) from wild flora of Gevas-Van in Turkey (Mount Artos) were studied using Gas Chromatography-Mass Spectrometry (GC-MS) and their antibacterial activities were assessed. A total of 18 compounds representing 99.98% of leaves oil were identified. The oils of the plant are all dominated by monoterpenes. The main compounds of essential oil in leaves were Limonene (45.77%), α-Pinene (23.94%), β-Phellandrene (10.83%), β-Pinene (5.68%), o-Cymene (3.30%), respectively. The essential oils were tested against Staphylacoccus aureus, Bacillus subtilis, Pseudomanas aeruginosa, Enterecoccus faecalis, Salmonella typhimurium, and Escherichia coli strains using the disc diffusion method. The diameter of the inhibition zones formed for bacteria were measured. The essential oils of JOO found to be active against all of the tested microorganisms and showed the susceptible inhibition zones. However, they were not as much as effective against bacterial strains when compared to ampicillin and ofloxacin. The extracts of JOO showed most significant antibacterial activity against Escherichia coli with inhibition zone diameter of 15 mm. The lowest inhibition zone diameter was Staphylococcus aureus with 11 mm. © 2018, Centenary University. All rights reserved.
Immunoexpression of P38 Mitogen-Activated Proteinkinase in Patients With Aggressive and Chronic Periodontitis
(Biolife Sas, 2013) Uraz, A.; Ayhan, E.; Yildirim, B.; Baris, E.; Pehlivan, S.; Eren, K.
The influence of p38 mitogen-activated proteinkinase (MAPK) expression in the development and progression of periodontal disease is currently under investigation. The aim of the present study is to investigate whether the p38 MAPK expression in gingival tissues correlates with IL-1 beta levels in gingival crevicular fluid (GCF). Twenty patients with generalized aggressive periodontitis (GAgP), 15 patients with generalized chronic periodontitis (GCP) and 10 healthy subjects (H) were enrolled in the study. Clinical data, gingival tissue biopsies and GCF samples were collected. The expression of p38 was investigated by immunohistochemistry. The levels of IL-1 beta inGCF were measured using ELISA. Mean clinical parameters and GCF volumes were statistically higher in patients with GAgP and GCP compared to H subjects. Higher levels of IL-1 beta were found in both periodontitis groups. The p38 expression was significantly increased in inflamed gingival tissues. There were no statistically significant differences in levels of IL-1 beta and p38 expression between subjects with GAgP and GCP. Our data support the hypothesis that MAPK signaling pathway is an additional player in the pathogenesis of periodontitis. This is the first report to evaluate the involvement of p38 MAPK in patients with GAgP and GCP which might be, in part, considered of value in understanding disease mechanisms.
Molecular Characterization of Some Soybean (Glycine Max L.) Varieties
(Centenary University, 2021) Kumlay, A.M.; Demırel, S.; Demırel, F.; Yildirim, B.
Global warming and the continuous increasing in human population have adverse effects on the food source. Soybean plays a significant role in human nutrition due to its high protein and fat content. In this study, the genetic relationship of 12 soybean varieties (Nova, Nazlican, SA88, Ataem7, Arısoy, A3127, Türksoy, Adasoy, Yemsoy, ANP2018, Yeşilsoy and Samsoy) was investigated using 6 IPBS markers. According to the results of the IPBS analysis, totally 44 polymorphic bands were obtained and the average polymorphism rate was 85.83%. The average number of polymorphic bands obtained per primer was determined as 7.33. The Dice similarity index between genotypes varied between 0.1 and 0.9091 with the average being 0.4506. According to the results of the analysis, the genotypes showing the closest relationship are Yeşilsoy and Arısoy varieties, while the farthest genotypes are Samsoy and Yemsoy. As a result, IPBS markers can be used effectively to characterize genotypes in the selection of suitable parents in soybean breeding programs. © 2021, Centenary University. All rights reserved.
Volatile Oil Components and Antibacterial Activity of Achillea Biebersteinii Afan. From Lake Van Basin, Turkey
(Chemical Publishing Co., 2015) Yildirim, B.; Ekici, K.; Rezaeieh, K.A.P.
Antibacterial activity of the essential oil from dried flowering aerial parts of Achillea biebersteinii (Van region of Turkey) was assessed against six microorganism using disc diffusion method. Five microorganisms sensitive to Alcillea biebersteinii Afan. were included Salmonella typhimurium ATCC 25241 (8-10 mm), Bacillus subtilis ATCC 6051 (8-10 mm), Pseudomonas aeruginosa ATCC 10145 (10-10 mm), Staphylococcus aureus ATCC 12600 (9-10 mm) and Escherichia coli ATCC 11775 (8-9 mm). Meanwhile, GC/MS analysis of oil releaved twenty-one compounds with the main compounds as camphor (20.77 %), 1,8-cineol (18.60 %), artemisia ketone (14.69 %), camphene (7.80 %), α-pinene (5.94 %), artemisia alcohol (5.88 %), β-phellandrene (4.87 %) and chrysanthenone (4.33 %), respectively.