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1-MCP, low O2 and high CO2 reduce disorders and extend vase life of "Rosalin" gerberas during storage
(Taylor and Francis, 2013-03) Akbudak, Bülent; Murat, Şenay; Uludağ Üniversitesi/Ziraat Fakültesi/Tarla Bitkileri Bölümü.; 56253171700; 55484924000
The hormone ethylene performs an important function in the processes related to the senescence of cut flowers, and, in particular, anti-ethylene treatments are recommended to extend the vase life of orchids. Among the treatments currently used for such postharvest treatment, 1-methylcyclopropene (1-MCP) is an efficient inhibitor of the autocatalytic production of ethylene. Although postharvest 1-MCP treatment is used to counter ethylene activity and delay senescence in fresh produce, its potential application in cut flowers has not been adequately tested. The objective of this study was to investigate the effect of 1-MCP treatment with modified atmosphere packaging on the shelf life of cut Rosalin gerberas. To this end, gerberas harvested at commercial maturity were divided into two groups: 1-MCP treatment (625 ppb at 4 +/- 1 degrees C for 4 hours) and no treatment. Both groups of flowers were stored under normal and modified atmosphere conditions at 4 +/- 1 degrees C and 80 +/- 5% relative humidity. The flowers were covered with materials of different characteristics for the modified atmosphere. To determine the differences between the treatments, quality parameters were examined in the flowers at 7-day intervals during the storage. The 1-MCP treatment with both the normal and modified atmosphere significantly reduced the overall postharvest loss in quality. The best results for the quality characteristics determined were obtained from the 1-MCP and 30 mu m polyvinylchloride combined treatment. These results indicate that 1-MCP and a modified atmosphere treatment are good methods for extending the vase life, maintaining the visual quality, and reducing the loss of quality of gerberas.
1st and 2nd law characteristics in a micropipe: Integrated effects of surface roughness, heat flux and reynolds number
(Taylor&Francis, 2009) Özalp, A. Alper; Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü.; 0000-0002-4976-9027; ABI-6888-2020; 6506131689
A computational study of the integrated effects of surface roughness, heat flux, and Reynolds number on the 1st and 2nd law characteristics of laminar-transitional flow in a micropipe is presented. Analyses are carried by solving the variable fluid property continuity, Navier-Stokes, and energy equations for the surface roughness, heat flux, and Reynolds number ranges of 1-50 m, 5-100 W/m2, and 1-2000, respectively. Computations put forward that surface roughness not only accelerates transition to lower Reynolds number but also augments heat transfer rates, such that the transitional Reynolds numbers and intermittency values are evaluated as 1650, 575, and 450 and 0.132, 0.117, and 0.136 for the surface roughness cases of 1, 20, and 50 m, respectively. Thermocritical Reynolds numbers are identified by determining the viscous dissipation rates, which characterize the heating/cooling behavior and the related Reynolds number range. Surface roughness comes out to have no role on entropy generation at low Reynolds numbers; moreover, entropy generation is found to be inversely proportional with mean temperature variation, where the trends become almost asymptotic at the lower limit of the investigated Reynolds number range. Being independent of surface roughness, heat flux, and Reynolds number, radial irreversibility distribution ratio is determined to be negligible at the pipe centerline, indicating that the frictional entropy is minor and the major portion of the total entropy generation is thermal based.
2D finite-element analysis of interlaminar flux density distribution at joints of zip-type unicore
(Elsevier, 2006-09) Moses, Anthony; Erdem, Sezer; Derebaşı, Naim; Uludağ Üniversitesi.; 0000-0003-2546-0022; AAI-2254-2021; AAI-1248-2021; 13805689400; 11540936300
Normal flux distribution along the rolling directions at joints of overlapped stacked electrical laminations is investigated to set up a flux distribution similar to that in the zip-type unicore. A 2D model of a C-core and three layers of overlapped laminations with joints with similar characterisitics to a zip-type unicore were formed and an FE analysis was carried out to solve the problem using a static magnetic analysis and unidirectional vector potential formulation. The results show that when the reluctance changes in the closed magnetic paths causes the flux deviates towards shorter magnetic paths moving to adjacent layers increasing the magnetic flux density. This redistribution causes the flux to transfer easier at joints in the unicore compared to other jointed cores.
2D holodirected lead(II) bromide coordination polymers constructed of rigid and flexible ligands
(Elsevier Science, 2009-04-01) Aslani, Alireza; Morsali, Ali; Büyükgüngör, Orhan; Yılmaz, Veysel Turan; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Anabilim Dalı.; 0000-0002-2849-3332; L-7238-2018; 7006269202
Three new 2D Pb-II coordination polymers containing 4,4'-bipyridine (4,4'-bipy), 1,2-bis(4-pyridyl)ethane (bpa) and 1,2-bis(4-pyridyl) ethene (bpe) with bromide anions, [Pb(mu-4,4'-bipy)(mu-Br)(2)](n) (1), [Pb(mu-bpa)(mu-Br)(2)](n) (2) and [Pb(mu-bpe)(mu-Br)(2)](n) ( 3) have been synthesized and characterized by elemental analysis, IR spectroscopy and their structures studied by X-ray crystallography. The thermal stability of compounds 1-3 was studied by thermal gravimetric (TG) and differential thermal analyses ( DTA). The single-crystal X-ray data shows that the Pb2+-ions have coordination numbers of six and contain the rarely holodirected geometries.
2D Magnetic texture analysis of Co-Cu films
(Walter de Gruyter Gmbh, 2017-05-01) Bayırlı, Mehmet; Karaağaç, Öznur; Koçkar, Hakan; Alper, Mursel; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; AAG-8795-2021; 7005719283
The magnetic textures for the produced magnetic materials are important concepts in accordance with technical applications. Therefore, the aim of this article is to determine 2D magnetic textures of electrodeposited Co-Cu films by the measurement of hysteresis loops at the incremented angles. For that, Co-Cu films were deposited with different Co2+ in the electrolyte. In addition, the easy-axis orientation in the films from the squareness values of the angles, M-p(beta) obtained by the hysteresis loops have been numerically studied using the Fourier series analysis. The differences observed in the magnetic easy-axis distributions were attributed to changes of the incorporation of Co2+ in the films with the change of Co2+ in the electrolyte. The coefficients of Fourier series (A(0) and A(2n)) were also computed for 2D films. It is seen that a systematic and small decrease in A(0) and an obvious decrease in A(2n) (n = 1) were observed with increasing incorporated Co in the films. Results imply that interactions cause slightly demagnetization effect accordance with higher incorporation of Co in the films. Furthermore, the crystal structure of the Co-Cu films analysed by X-ray diffraction revealed that the films have dominantly face-centred cubic structure. Film contents analysed by energy-dispersive X-ray spectroscopy and film morphologies observed by scanning electron microscope also support the magnetic texture analysis results found by numerical computation.
A 4 year retrospective analysis of our patients with mushroom poisoning
(Sage, 2013-03) Köksal, Özlem; Armaǧan, Erol; İnal, Taylan; Ayyıldız, Talat; Öner, Nuran; Uludağ Üniversitesi/Tıp Fakültesi/Acil Tıp Anabilim Dalı.; Uludağ Üniversitesi/Tıp Fakültesi/Gastroenteroloji Anabilim Dalı.; 0000-0003-2271-5659; AAH-8846-2021; AAK-8332-2020; 23389880200; 6506464232; 55695563500; 6603155277; 55695552500
Objective: This study presented the demographic, clinical and laboratory data for the patients who presented to our emergency department (ED) with mushroom poisoning. Methods: We retrospectively examined the data for adult patients with mushroom poisoning that presented to the ED of Uludag University, Faculty of Medicine between 1 January 2007 and 31 December 2010. Results: A total of 53 patients were enrolled in the study. The mean age was 46.58 +/- 15.47. 52.8% of the patients were female, while 47.2% were male. These patients were typically admitted in the autumn. The most commonly seen symptoms were gastrointestinal such as nausea and vomiting. The time to symptom onset was <6 hours for 30.2% of the patients and >6 hours in 69.8% of the patients. While 73.5% of the patients received gastric lavage, activated charcoal and intravenous fluid therapy, 15.1% received penicillin, N-acetylcysteine and intravenous fluid therapy. For the remaining patients (11.4%) silibinin, dialysis and plasmapheresis were administered. While 35.8% of the patients were hospitalised, 64.2% were discharged from the ED. The median duration of stay in the ED was 6 hours (range: 1-27 hours); the median duration of stay among inpatients was 6 days (range: 1-36 days). Three of the hospitalised patients died, and two underwent hepatic transplantation. Conclusions: Mushroom poisoning remains an important issue that is encountered in rural areas during the rainy autumn season in our region. The condition may be fatal, but can be prevented by early and appropriate treatment.
4-(N-hydroxyphenyl)retinamide can selectively induce apoptosis in human epidermoid carcinoma cells but not in normal dermal fibroblasts
(Taylor & Francis, 2001) Wood, E. J.; Ulukaya, Engin; Kurt, Ayberk; Uludağ Üniversitesi/Tıp Fakültesi/Biyokimya Anabilim Dalı.; K-5792-2018; 6602927353; 36615287100
The retinoid 4-(N-hydroxyphenyl)retinamide (4HPR, fenretinide) has both growth inhibitory and apoptosis-inducing effects on a number of cancer cell lines in vitro and in vivo and has been entered into a number of oncological trials. However, little is known about its mechanism(s) of action or its effects on normal cells such as fibroblasts. In this study, the effects of fenretinide on both epidermoid carcinoma cells of vulva (cell line A431) and normal human dermal fibroblasts, both as monolayers and also grown in 3D cell culture systems, have been investigated. The 3D cell culture system contained normal human fibroblasts embedded in a type I collagen gel with the carcinoma cells seeded on top of the collagen gel, which mimics the epidermoid carcinoma. Fenretinide significantly inhibited the rate of DNA synthesis of carcinoma cells, while there was little effect on fibroblasts on monolayers, at 10(-6)-10(-5) M, which are clinically attainable does. Fenretinide at 5 x 10(-6) M induced apoptosis characterised by cell shrinkage, membrane blebbing, nuclear condensation and/or fragmentation, and cell detachment in carcinoma cells, but not fibroblasts from monolayers. Fenretinide also reduced the viability of carcinoma cells in the 3D cell culture system without affecting fibroblasts. These data show that fenretinide may preferentially induce apoptosis in epidermoid carcinoma cells.
4-Transitivity and 6-figures in some Moufang-Klingenberg planes
(Springer, 2006-10-31) Çelik, Basri; Akpınar, Atilla; Çiftçi, Süleyman; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Matematik Bölümü.; 0000-0001-7234-8063; 0000-0002-7612-2448; AAE-2600-2019; ABB-9790-2020; 23026643900; 23026537500; 26635052900
In this paper, the Moufang-Klingenberg plane over a local alternative ring R of dual numbers is studied. It is shown that its collineation group is transitive on quadrangles. It is therefore shown that the coordinatization of these Moufang-Klingenberg planes is independent of the choice of the coordinatization quadrangle. Also, the concept of 6-figures is extended to these Moufang-Klingenberg planes and it is shown that any 6-figure corresponds to only one inversible m epsilon R.
5,5-diethylbarbiturate complexes of silver with 2,2 '-bipyridine and 3-(2-pyridyl)propanol: Syntheses, crystal structures, spectroscopic, thermal and antimicrobial activity studies
(Walter de Gruyter Gmbh, 2008-02) Karakaya, Haydar; Yılmaz, Fatih; Büyükgüngör, Orhan; Yılmaz, Veysel Turan; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü.; 0000-0002-2849-3332; L-7238-2018; 7006269202
Two silver 5,5-diethylbarbiturate (barb) complexes with 2,2'-bipyridine (bpy) and 3-(2-pyridyl) propanol (pypr), [Ag(barb)(bpy)] (1) and [Ag(barb)(pypr)] (2), have been prepared and characterized by elemental analysis, IR spectroscopy, thermal analysis, and single crystal X-ray diffraction. Both complexes crystallize in the triclinic space group P (1) over bar with Z = 2. The barb ligand in 1 is N-coordinated and the bpy ligand acts as a bichelating ligand leading to an AgN3 tricoordination. Crystals of 1 feature a three-dimensional network based on N-H center dot center dot center dot O hydrogen bonding, pi(bpy)center dot center dot center dot pi(bpy), C-H center dot center dot center dot pi(bpy) and pi(bpy)-Ag interactions. In 2, the pypr and barb ligands behave as monodentate ligands through their N atoms, forming a distorted linear AgN2 coordination. Molecules of 2 are doubly bridged by N-H center dot center dot center dot O hydrogen bonds and further connected via O-H center dot center dot center dot O hydrogen bonds and aromatic pi(pypr)center dot center dot center dot pi(pypr) stacking interactions into a supramolecular network. Both complexes exhibit similar thermal decomposition behavior in air. The first stage corresponds to removal of the co-ligands such as bpy or pypr while the degradation of the barb moiety occurs at higher temperatures to give Ag2O. Like the barb, bpy and pypr ligands, 2 does not show any significant antimicrobial activity, but 1 is active against bacteria and fungi.
5,5-Diethylbarbiturato complexes of copper(II) with (2-aminoethyl)piperidine, -pyrrolidine, and -morpholine: Syntheses, crystal structures, spectroscopic, and thermal properties
(Taylor & Francis, 2009) Büyükgüngor, Orhan; Aksoy, Mehmet Suat; Yılmaz, Veysel Turan; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Anabilim Dalı.; 0000-0002-2849-3332; L-7238-2018; 8986297500; 7006269202
Three new complexes, [Cu(barb)2(aepip)] center dot 0.5H2O (1), [Cu(barb)2(aepyrd)] (2), and [Cu(barb)2(aemrph)] (3), have been synthesized by reaction of 5,5-diethlybarbiturate anion (barb) with copper(II) in the presence of (2-aminoethyl)piperidine (aepip), -pyrrolidine (aepyrd), and -morpholine (aemrph). All complexes were characterized by elemental analysis, spectroscopic (IR and UV/Vis), thermal (DTA-TGA), and magnetic susceptibility measurements. X-ray single crystal diffraction shows that 1 and 2 are discrete mononuclear species, in which copper(II) is coordinated by two bidentate barb ligands and a chelating aepip or aepyrd, forming a square-pyramidal coordination geometry. Complexes 1 and 2 show unequal coordination of barb, one N-coordinate, and one bidentate. Complex 3 is also mononuclear, but copper(II) is square-planar with two N-coordinated barb and one bidentate aemorph. Molecules of 1-3 are bridged by strong hydrogen bonds to generate 1-D or 2-D supramolecular networks. Spectral and thermal data for 1-3 are in agreement with crystal structures.
6-phosphofructo-2-kinase/fructose 2,6-bisphosphatase-3 is required for transforming growth factor β1-enhanced invasion of Panc1 cells in vitro
(Elsevier, 2017-01-31) Chesney, Jason A.; Yalçın, Abdullah; Solakoğlu, Tuğba H.; Özcan, Selahattin C.; Güzel, Saime; Peker, Sabire; Çelikler, Serap; Balaban, Başak D.; Sevinç, Elif; Gürpınar, Yunus; Uludağ Üniversitesi/Veteriner Fakültesi/Biyokimya Anabilim Dalı.; Uludağ Üniversitesi/Veteriner Fakültesi/Histoloji ve Embriyoloji Anabilim Dalı.; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Biyoloji Bölümü.; 0000-0001-8519-8375; 0000-0003-1733-4288; 0000-0003-0796-5000; 0000-0002-4177-3478; 0000-0002-7698-0872; ABI-4164-2020; AAA-6938-2022; AAH-4275-2021; AAH-2767-2021; 36857831000; 57193156208; 22835997800; 55460886200; 55109615900; 8234554800; 6604052452; 56508326500; 57193160752
Transforming growth factor [31 (TGF beta 1) is a well -established inducer of the epithelial-mesenchymal transition (EMT) that is essential for the acquisition of malignant properties, such as invasion, in tumor cells. Although recent studies suggest that the EMT in tumor cells is associated with reprogramming of energy metabolism and TGF beta 1 has been shown to stimulate glycolysis in multiple primary cell lines, little is known about TGF beta l 's effect on glycolysis and glycolytic regulators in transformed cells. Given the known regulatory role of 6-phosphofructo-2-kinase/fructose 2,6-bisphosphatase-3 (PFKFB3) in glycolysis and association of glycolytic activity with malignant features such as invasion, we sought to investigate whether TGF beta 1 regulates PFKFB3 expression and if PFKFB3 is involved in the TGF beta l -mediated increase in the invasive ability of the Panc1 cell cline a well -established model of TGF beta 1 -initiated EMT. Herein we demonstrate that TGF beta 1 induces PFKFB3 expression and stimulates glycolysis in Panci cells. We also show that s1RNA silencing of PFKFB3 prevents the stimulation of glycolysis and in vitro invasive ability of Panci cells by TGF beta 1. Furthermore, PFKFB3 silencing suppresses the TGFfil -mediated induction of the Snail protein, suggesting that PFKFB3 is required for the regulation of Snail expression by TGFfil. Taken together, our study identifies PFKFB3 as a key TGF beta 1 effector protein that mediates TGF beta 1's effect on Snail expression, invasion, and glycolysis.
A comparative study of energy consumption and recovery of autonomous fuel-cell hydrogen-electric vehicles using different powertrains based on regenerative braking and electronic stability control system
(MPDI, 2021-03) Yıldız, Ahmet; Özel, Mert Ali; Uludağ Üniversitesi/Mühendislik Fakültesi/Makina Mühendisliği.; 0000-0001-5434-4368; 0000-0003-2887-3359; T-8076-2018; AAP-3077-2021; 58070251000; 57222521121
Today, with the increasing transition to electric vehicles (EVs), the design of highly energy-efficient vehicle architectures has taken precedence for many car manufacturers. To this end, the energy consumption and recovery rates of different powertrain vehicle architectures need to be investigated comprehensively. In this study, six different powertrain architectures-four independent in-wheel motors with regenerative electronic stability control (RESC) and without an RESC, one-stage gear (1G) transmission, two-stage gear (2G) transmission, continuously variable transmission (CVT) and downsized electric motor with CVT-were mathematically modeled and analyzed under real road conditions using nonlinear models of an autonomous hydrogen fuel-cell electric vehicle (HFCEV). The aims of this paper were twofold: first, to compare the energy consumption performance of powertrain architectures by analyzing the effects of the regenerative electronic stability control (RESC) system, and secondly, to investigate the usability of a downsized electrical motor for an HFCEV. For this purpose, all the numerical simulations were conducted for the well-known FTP75 and NEDC urban drive cycles. The obtained results demonstrate that the minimum energy consumption can be achieved by a 2G-based powertrain using the same motor; however, when an RESC system is used, the energy recovery/consumption rate can be increased. Moreover, the results of the article show that it is possible to use a downsized electric motor due to the CVT, and this powertrain significantly reduces the energy consumption of the HFCEV as compared to all the other systems. The results of this paper present highly significant implications for automotive manufacturers for designing and developing a cleaner electrical vehicle energy consumption and recovery system.
A numerical study of heat and mass transfer in falling film absorber
(Pergamon-Elsevier Science, 1999) Yiǧit, Abdulvahap; Uludağ Üniversitesi/Mühendislik Mimarlık Fakültesi/Makine Mühendisliği Bölümü.; 7006225124
This paper describes a model of the absorption process in a falling film Lithium Bromide-Water absorber. Absorption of a gas or vapor into a laminar falling film on the surface of a vertical tube is taken into account. Necessary boundary conditions are provided to solve simultaneous parabolic partial-differential equation which are obtained by diffusion and energy equations characterizing absorption process. To solve these partial differential equations Crank-Nichelson Method was used. Solutions for temperature and concentration distributions were obtained by applying these equations in discretized flow field. Nusselt and Sherwood numbers are calculated for absorber. The coolant-side heat transfer coefficient may be calculated using standard correlations. The effect of varying coolant flow rate, solution flow rate and coolant temperature are also studied. Results which are found out from the model are compared with experimental data and analytical results. Agreement is found to be good.
A traditional Turkish fermented cereal food: Tarhana
(Taylor & Francis, 2007) Özdemir, Sibel; Göçmen, Duygu; Kumral, A. Yıldırım; Uludağ Üniversitesi/Ziraat Fakültesi/Gıda Mühendisliği Bölümü.; 18038353400; 55967047900; 16039935800
Tarhana has a long history. According to historical records, it was first produced by Turkish people in Middle Asia and afterwards it spread out to different parts of the world. It is a fermented cereal-based food and can be simply defined as a mixture of yoghurt, cereal flours, yeast, different vegetables, herbs, and spices. After the inixing process, tarhana dough is fermented for 1 to 5 days and immediately dried. Both lactic acid bacteria (LAB) and yeast fermentations occur simultaneously, during tarhana production. Therefore, tarhana has sour and acidic taste with yeast flavour as well. It is sun-dried at the home-made level or oven-dried of the commercial level. Several types of tarhana can be classified depending upon processing method or raw materials used. Low moisture (6-10%), low pH (3.5-5.0), and components (organic acids, bacteriosin, etc.) formed in fermentation have bacteriostatic effect on pathogens and spoilage microorganisms during long term storage (1-2 years) and enhance shelf life. Since tarhana is a good source of B vitamins, minerals, organic acids, and free amino acids, and since it is a product of LAB and yeast fermentation, it may be considered a junctional and probiotic food.
Abnormal subclavian branching of the left aortic arch in a Native Goat
(Medwell Online, 2009-03) Yılmaz, Bestami; Arıcan, İlker; Uludağ Üniversitesi/Veterinerlik Fakültesi/Anatomi Anabilim Dalı.; 0000-0001-6342-0094; AAG-7518-2021; 14055524200
This study describes a case of abnormal subclavian branching of the left aortic arch in a Native Goat. During the dissection performed on a cadaver of a 1-year-old, male Native Goat, brachiocephalic trunk and left subclavian artery were seen to arise as 2 separate branches while the bicarotic trunk was not formed.
Abrasion of polyester fabrics containing staple weft yarns: Color strength and color difference values
(Amer Assoc Textile Chemists Colorists - AATCC, 2006) Akgün, Mine; Becerir, Behçet; Alpay, Halil Rıfat; Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0002-2655-2773; AAH-1445-2021; AAG-9756-2021; 9839293900; 9839809500; 9841273700
This paper assesses the color difference and color strength values (K/S) obtained for eight disperse-dyed polyester fabric samples with different fabric construction parameters (weft yarn count, weft density, and fabric weave) after three different sets of abrasion cycles. Warp yarn type and number, warp density, and warp yarn twist were the same for all fabrics. The K/S values of the abraded fabrics and color difference values between the control fabric (dyed but not abraded) and abraded fabrics were calculated. The main differences in the K/S and color difference values were observed between 0- 2,500 abrasion cycles. The high tenacity of the polyester fibers during testing caused fuzz and pilling formation on the fabric surface that led to decreased K/S values and color differences.
Abrasion resistance and tensile strength of chenille and macaroni upholstery fabrics
(Ege Üniversitesi, 2011) Tekoǧlu, Onur; Kavuşturan, Yasemin; Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; 0000-0002-9919-564X; A-7462-2018; 24824357200
In this study, an experimental work is. presented to determine the effects of two different fancy yarn structures (chenille and macaroni) and four different raw materials (acrilic, cotton, polyester and viscose) on the abrasion and tensile propertries of woven upholstery fabrics. Results were evaluated by SPSS statistical program. All test results were assessed at a confidence level of at least 95% (at most 5% significance level). The abrasion resistance and tenacity values of chenille and macaroni yarns were measured too. Abrasion resistance and tenacity values of chenille and macaroni yarns are affected significantly by material type and fancy yarn structure. Macaroni yarns show higher. weight loss (%) ratio and tenacity values than chenille yams. Thickness values of chenille fabrics are higher than macaroni fabrics. Weight loss (%) values of chenille fabrics are higher than macaroni fabrics. The macaroni fabrics show higher stress values at max. load than chenille fabrics. The cotton and polyester yarns. are abraded less than others. Polyester yams and fabrics show the highest tensile strength values. Viscose yarns and fabrics less resistant to abrasion.
Acaricidal activity of Origanum bilgeri PH Davis (Lamiaceae) essential oil and its major component, carvacrol against adults Rhipicephalus turanicus (Acari: Ixodidae)
(Elsevier, 2013-03) Koç, Samed; Öz, Emre; Cinbilgel, İlker; Çetin, Hüseyin; Aydın, Levent; Uludağ Üniversitesi/Veterinerlik Fakültesi/Parazitoloji Anabilim Dalı.; 55808198600
The acaricidal activity of an essential oil obtained from aerial parts of Origanum bilged P.H. Davis (Lamiaceae), an endemic species in Turkey, and its major constituents, carvacrol was evaluated against unfed adults Rhipicephalus turanicus Pomerantzev (Acari: Ixodidae) collected from Kepez, Antalya. The composition of the essential oil was analyzed by GC/MS. The major compound identified in the oil was carvacrol (93.02%). Generally, tick mortalities to the O. bilged distillate and carvacrol increased with concentrations. O. bilged oil produced >83% mortality at 48 h at a concentration of 0.8% and mortality was higher than 63% at a carvacrol concentration of 0.4%. Our results have shown that O. bilged essential oil and its major component, carvacrol, may have potential as acaricidal agents against R. turanicus.
Acaricidal activity of Satureja thymbra L. essential oil and its major components, carvacrol and gamma-terpinene against adult Hyalomma marginatum (Acari: Ixodidae)
(Elsevier, 2010-06-24) Çetin, Hüseyin; Cilek, James E.; Öz, Emre; Deveci, Önder; Yanıkoğlu, Atila; Aydın, Levent; Uludağ Üniversitesi/Veterinerlik Fakültesi/Parazitoloji Bölümü.; 55808198600
The acaricidal activity of a volatile essential oil hydrodistillate of Satureja thymbra L (Lamiaceae) and its major constituents, carvacrol and gamma-terpinene, were evaluated against field-collected unfed adult Hyalomma marginatum. The distillate was tested against this tick species at 5, 10, 20, and 40 mu L/L while the two major components were each tested at 10 mu L/L. Generally, tick mortality to the S. thymbra distillate increased with concentration and exposure time. Ticks exposed to vapors from cotton wicks containing at least 40 mu L/L resulted in complete (100%) mortality at 3 h. The lower concentrations provided >= 90% mortality at 3 h post treatment with complete mortality at 24 h. Knockdown was observed only in the carvacrol and gamma-terpinene treatments. Ticks exposed to carvacrol-treated wicks produced >93% knockdown at 3 h but at 24 h approximately 57% were dead. The gamma-terpinene treatment produced >= 90% knockdown at 105 min through 3 h but at 24 h only about 87% of the ticks were dead.
Acaricidal activity of the essential oils from three lamiaceae plant species on rhipicephalus turanicus pom. (acari: ixodidae)
(Springer, 2012-10) Koç, Samed; Öz, Emre; Çetin, Hüseyin; Aydın, Levent; Uludağ Üniversitesi/Veteriner Fakültesi/Parazitoloji Anabilim Dalı.; 0000-0002-2875-8003; 55808198600
Acaricidal effects of three Labiatae essential oils extracted from ariel parts of Thymus sipyleus Boiss. subsp. sipyleus, Mentha longifolia L., and Dorystoechas hastata Boiss. & Heldr. ex Bentham on 10-day-old Rhipicephalus turanicus Pom. (Acari: Ixodidae) larvae were evaluated by using the larval packet test bioassay. Serial dilutions of the three essential oils were tested from a starting concentration of 1-0.1 % (1.0, 0.5, 0.25, and 0.1 % w/v). Results showed that all essential oils had very similar activity, producing complete mortality (100 %) in all tested concentrations on 10-day-old R. turanicus tick larvae.

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