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Evaluation of anesthetic potential of rosewood (Aniba rosaeodora) oil as a new anesthetic agent for goldfish (Carassius auratus)
No full textThe aim of this research was to investigate the efficacy of rosewood (Aniba rosaeodora) essential oil (EO) as a new herbal anesthetic compared with camphor (Cinnamomum camphora) EO and commonly used chemical agent 2-phenoxyethanol (2-PE) on goldfish (Carassius auratus). The anesthetic efficacies of these herbal EOs and 2-PE were evaluated in goldfish with mean body weight of 7.36 ± 0.77 g. Fish were exposed to each anesthetic concentrations and the lowest effective concentrations (LECs) were established according to deep anesthesia (AD < 3 min) and full recovery (RF < 5 min) times. RD and CP showed anesthetic characteristics and induced AD. The LECs for each anesthetic were established at 250 μl L−1 for RD (AD; RF → 171 ± 2.28 s; 297 ± 7.69 s), 250 μl L−1 for CP (AD; RF → 129 ± 4.18 s; 291 ± 2.81 s) and 700 μl L−1 for 2-PE (AD; RF → 177 ± 2.35 s; 214 ± 4.93 s). At concentrations of 50, 100, 150, 200 μl L−1 for RD, 50, 100, 150 μl L−1 for CP and 400, 500 μl L−1 for 2-PE failed to induce AD in goldfish. There were significantly differences found among RD, CP and 2-PE concentrations in terms of induction and recovery times (p < 0.05). The fastest AD and RF were obtained by 300 μl L−1 CP (120 ± 1.94 s) and 600 μl L−1 2-PE (190 ± 4.34 s), respectively. Fish exposed to 300 μl L−1 RD and 800 μl L−1 2-PE took slightly longer to achieve AD than 300 μl L−1 CP. Induction and recovery times for EOs and 2-PE were significantly dependent on concentrations. Negative relationships was recorded between AD and RF for all anesthetics. No mortality or adverse effects occurred and fish stayed calm during trials. Results showed that RD was found to be an effective anesthetic as well as CP for goldfish and can be used at least 3-fold lower concentrations than 2-PE. In conclusion, rosewood (Aniba rosaeodora) EO, as a new potential anesthetic for fish, proved to be an effective natural agent resulting in rapid induction and recovery
Risk Assessment with Failure Mode and Effect Analysis and Gray Relational Analysis Method in Plastic Enjection Prosess
No full textThis study aims to evaluate the risks that may arise during the production process in a plastic injection manufacturing enterprise with traditional Failure Mode and Effect Analysis (FMEA) and Grey Relational Analysis (GRA). Although it is a widely used analytical technique that helps to identify and reduce the risks of failure in a process, the Failure Mode and Effects Analysis (FMEA) has some drawbacks that the different risks can have the same risk priority values and the weight of risk factors is not take into consideration. This situation has been tried to be eliminated by integrating the FMEA with the GRA. As a result, it is seen that the order of risk priority values of the identified failure changes according to both methods
Remazol brilland blue R'a maruz bırakılan kerevit (astacus leptodactylus)'in solungaç dokusunda biyokimyasal yanıtın araştırılması
No full textBu çalışmada, çeşitli konsantrasyonlarda tekstil boyar maddesi Remazol Brilland
Blue R'a maruz bırakılan tatlısu istakozu (Astacus leptodactylus Eschscholtz, 1823)'nda
biyokimyasal yanıtın araştırılması amaçlanmıştır.
Çalışma grupları, kontrol grubu (0 mg/l-1
) ve kerevitlerin Remazol Brillant Blue R 3
subletal dozuna (0,5 mg/l-1
, 1 mg/l-1
ve 2 mg/l-1
) maruz bırakıldığı deneme grupları
şeklinde oluşturuldu. Her akvaryumda bulunan kerevitlerin 24 saat ve 48 saat sonunda
akvaryumdan alınmıştır. Biyokimyasal yanıtın belirlenmesi için kerevitin solungaç
dokusunda glutatyon (GSH), süperoksit dismutaz (SOD), katalaz (CAT) ve
malondialdehyde (MDA) seviyeleri incelenmiştir.
SOD aktivitesi araştırılmış olup, 24 saat ile 48 saatlik örneklemeler arasında
istatistiksel olarak anlamlı bir fark bulunamamıştır (p>0.05). 24 saatlik örneklemede
uygulanan dozlar arasında istatistiksel olarak önemli bir fark tespit edilemezken (p>0.05),
48 saatlik örneklemede ise doz grupları arasında istatistiksel olarak anlamlı bir farkın
olduğu tespit edilmiştir (p<0.05).
CAT aktivitesinde, 24 ve 48 saatlik örneklemeler arasında 1 mg/l-1
dışında istatistiksel
olarak anlamlı bir fark bulunmuştur (p<0.05). 24 ve 48 saatlik deneme grupları kendi
içerisinde karşılaştırıldığında, bütün dozlar kendi arasında anlamlı bir fark vermiştir
(p<0.05).
GSH ve MDA sonuçları ise istatistiksel olarak anlamlı bir sonuç vermemiştir (p>0.05).Munzur Üniversitesi Bilimsel Araştırma Projeleri Birimi, YLMUB016-27 Nolu Proj
An investigation of the near-wake flow structure of a cylinder with guiding plates
No full textIn this study, the flow behind a circular cylinder with a pair of outer identical guiding plates was investigated using particle image velocimetry (PIV) for various angular positions of the plates (i.e. α=±70°, ±100°, and ±130°). The gaps between these plates and cylinder are equal and are 0.3D. Experiments were carried out at a subcritical Reynolds (Re=ρ·U∞·D/μ) number of 7500, based on the cylinder diameter (D) and the flow velocity (U∞). The features of the near-wake with and without the guiding plates were interpreted in terms of patterns of time-averaged vorticity and streamlines, time-averaged and fluctuating velocity components. The spectral analysis was also carried out to determine the time-dependent variation of the transverse velocity at given locations in the near-wake. Two-dimensional computations of flow around circular cylinders with and without guiding plates have also been performed to predict the timeaveraged and root-mean-square of force coefficients of the various models. It was seen that the guiding plates at an appropriate angular position can lead to substantial attenuation, or retardation, of the process of large-scale vortex formation in the near-wake, thus can lead to vortex-induced vibration (VIV) suppression without any increase in drag
Trace metal levels in rainbow Trout (Oncorhynchus mykiss) cultured in net cages in a reservoir and evaluation of human health risks from consumption
No full textAlthough fish consumption has positive health effects, metals accumulated in fish can cause human health risks. In this study, the levels of ten metals in rainbow trout (Oncorhynchus mykiss) farmed in the Keban Dam Reservoir, which has the biggest rainbow trout production capacity in Turkey, were determined and compared with the maximum permissible levels (MPLs). Also, human health risks associated with rainbow trout consumption were assessed. The metal concentrations in rainbow trout were found below the MPLs. The estimated daily intake of each metal was much lower than the respective tolerable daily intake. The target hazard quotient (THQ) for individual metal and total THQ for combined metals did not exceed 1, indicating no health risk for consumers. The cancer risk (CR) value for inorganic arsenic was within the acceptable lifetime risk range of 10(-6) and 10(-4). For carcinogenic and non-carcinogenic effects, the maximum allowable fish consumption rates were high enough to ensure the human health. According to these results, the consumption of rainbow trout farmed in the Keban Dam Reservoir does not pose a risk on human health.This work was supported by Munzur University Scientific Projects Coordination Department (Project Number:YLTUB015-07)
Checklist of Turkish bryophyte vegetation
No full textA list of the known bryophyte syntaxa in Turkey compiled according to the methodology of
Braun-Blanquet is presented in this study. Altogether, 41 associations and 19 subassociations
belonging to 19 alliances, 12 orders, and eight bryosociological classes have been determined to
date in Turkey. Moreover, six communities and 17 units of unknown phytosociological status
have also been reported. The bryosociological syntaxa are grouped on the basis of their aquatic,
terrestrial, or epiphytic character and given together with their localities and synonyms
“Evaluation of Anasthetic Potential of Rosewood (Aniba rosaeodora) Oil as a New Anesthetic Agent for Goldfish (Carassius auratus)”
No full textThe aim of this research was to investigate the efficacy of rosewood (Aniba rosaeodora) essential oil (EO) as a new
herbal anesthetic compared with camphor (Cinnamomum camphora) EO and commonly used chemical agent 2-
phenoxyethanol (2-PE) on goldfish (Carassius auratus). The anesthetic efficacies of these herbal EOs and 2-PE
were evaluated in goldfish with mean body weight of 7.36 ± 0.77 g. Fish were exposed to each anesthetic
concentrations and the lowest effective concentrations (LECs) were established according to deep anesthesia
(AD < 3 min) and full recovery (RF < 5 min) times. RD and CP showed anesthetic characteristics and induced
AD. The LECs for each anesthetic were established at 250 μl L−1 for RD (AD; RF→171 ± 2.28 s; 297 ± 7.69 s),
250 μl L−1 for CP (AD; RF→129 ± 4.18 s; 291 ± 2.81 s) and 700 μl L−1 for 2-PE (AD; RF→177 ± 2.35 s;
214 ± 4.93 s). At concentrations of 50, 100, 150, 200 μl L−1 for RD, 50, 100, 150 μl L−1 for CP and 400,
500 μl L−1 for 2-PE failed to induce AD in goldfish. There were significantly differences found among RD, CP and
2-PE concentrations in terms of induction and recovery times (p < 0.05). The fastest AD and RF were obtained
by 300 μl L−1 CP (120 ± 1.94 s) and 600 μl L−1 2-PE (190 ± 4.34 s), respectively. Fish exposed to 300 μl L−1
RD and 800 μl L−1 2-PE took slightly longer to achieve AD than 300 μl L−1 CP. Induction and recovery times for
EOs and 2-PE were significantly dependent on concentrations. Negative relationships was recorded between AD
and RF for all anesthetics. No mortality or adverse effects occurred and fish stayed calm during trials. Results
showed that RD was found to be an effective anesthetic as well as CP for goldfish and can be used at least 3-fold
lower concentrations than 2-PE. In conclusion, rosewood (Aniba rosaeodora) EO, as a new potential anesthetic for
fish, proved to be an effective natural agent resulting in rapid induction and recovery
Orta derece ısı ve kür etkisinin atık lastik ince agrega ile üretilmiş harç özellikleri üzerine etkisi
No full textThis laboratory study aims to investigate curing and thermal effect on mechanical properties of mortar produced with waste rubber as fine aggregate. For this purpose, three type of rubber content was used in mix design like 0%, 10% and 20%. Mortar specimens were produced with 520 kg cement. The type of used cement is CEM I 42.5 R ordinary Portland cement and w/c ratio were kept at 0.485 level at all mix design. Rilem sand was used in the mortar. Rolled crumb waste rubber was used in the composition and the grain size of used waste rubber was between 1-4 mm. The effect of curing age was evaluated on compressive strength and abrasion resistance on the base of three distinct rubber content. Moreover, the compressive strength results were evaluated with two different temperature levels, i.e. 1500C and 2000C and three different curing age condition, i.e. 3 days, 7 days and 28 days. As a result, it was observed that there is a constant decrease at early curing age of mortar in terms of compressive strength, but there is a sharp decrease at 28-days curing condition. As for abrasion resistance, it was determined that abrasion loss was increased in the early curing age of specimens. However, abrasion loss was decreased with increasing rubber content.Bu laboratuvar çalışması ile atık lastik ince agrega ile üretilen harçların mekanik özellikleri üzerinde kür ve orta dereceli ısı
etkisinin nasıl bir etki yaptığını belirtmek amaçlamaktadır. Bu sebeple, karışım hesabında %0, %10 ve %20 gibi üç çeşit atık
lastik oranı kullanıldı. Harç numunelerinin karışım hesabında 520 kg çimento kullanıldı. Kullanılan çimento türü, CEM I 42.5 R
Portland çimentosu ve su/çimento oranı, tüm karışım tasarımında 0.485 seviyesinde tutulmuştur. Harcın içinde rilem kumu
kullanılmıştır. Karışımda yuvarlak atık kauçuk kullanılmış ve kullanılan atık kauçukların dane boyutu 1-4 mm arasındadır. Kür
süresinin etkisi, üç farklı atık lastik içeriğinin temelinde basınç dayanımı ve aşınma direnci açısından değerlendirildi. Dahası,
basınç dayanımları iki farklısıcaklık seviyesinde, yani 150oC ve 200oC'de ve üç farklı kür süresi koşuluyla, yani 3 gün, 7 gün ve
28 gün ile değerlendirildi. Sonuç olarak, basınç dayanımı açısından, harcın erken yaşlardaki değerlerinde sabit bir düşüş
gözlenirken, 28 günlük kür koşullarında keskin bir düşüş görülmüştür. Aşınma direnci ile ilgili olarak, numunelerin erken yaşlarında aşınma kaybının arttığı belirlenmiştir. Bununla birlikte; aşınma kaybı, artan atık lastik içeriğiyle azalmıştır
Malathion-induced spermatozoal oxidative damage and alterations in sperm quality of endangered trout Salmo coruhensis.
No full textThe use of pesticides has been increased along with increasing the farming activities and has caused environmental impacts deleteriously. In particular, non-target organisms including fish can be affected by toxic effects of pesticides. Therefore, the impacts of malathion (MTN) on oxidative stress and sperm quality were investigated in vitro. The MTN concentrations used on this study were 0 (control), 75, 100, and 125 μg/L. Lipid peroxidation (MDA), non-enzymatic (GSH), and enzymatic (SOD, GSH-Px, and CAT) activities in spermatozoa were examined for determination of oxidative stress status. Our findings showed that motility rate and period of sperm cells significantly decreased with exposure to MTN. Biochemical assays revealed that CAT activity and levels of MDA, GSH increased in spermatozoa based on concentration while activity of GSH-Px and SOD decreased. Consequently, spermatozoa were highly sensitive to MTN exposure. MTN has disruptive effects on sperm quality and caused to oxidative stress in spermatozoa
Seçim kampanyaları ve seçmen davranışları ilişkisi: Çemişgezek örneği
No full textkampanyaları arasındaki ilişkiyi incelemektir. Bu doğrultuda seçmenlerin seçim
kampanyalarına ilişkin davranışları cinsiyet, medeni durum, yaş, gelir durumu, eğitim
durumu ve ideolojik tercihleri analiz edilmiştir. Araştırmanın katılımcılarını Tunceli
ilinin Çemişgezek ilçesinde bulunan yaş aralığı 18-65+ olan 420 seçmen (211 Kadın,
214 Erkek) oluşturmaktadır. Araştırmada veri toplama aracı olarak araştırmacı
tarafından geliştirilmiş Seçmen Tercihi Ölçeği (STÖ) kullanılmıştır. Bu sebeple
araştırmacı çalışma sürecini yürütürken öncelikle taslak STÖ oluşturmuş, uzman
görüşü alınmış, 216 kişiye pilot uygulama yapıldıktan sonra madde ve faktör analizi
yapılarak ölçek geliştirilmiştir.
Bu çalışma üç ana bölüm ve sonuç kısmından oluşmaktadır. Birinci bölümde
iletişim ve siyasal iletişim başlıkları kapsamlı bir şekilde ele alınmış olup ikinci
bölümde seçmen davranışları ve seçim kampanyaları konuları üzerinde durulmuştur.
Araştırmanın üçüncü bölümünde çalışmanın asıl uygulamalarına geçilmiş, oluşturulan
geçerli ve güvenilir STÖ 420 seçmene uygulanmıştır. Veriler analiz edilirken ilişkisel
tarama yöntemi tercih dilmiş, betimleyici istatistikler, frekans, yüzde bağımsız
örneklem t-testi, ANOVA ve TUKEY testi yapılmıştır. Sonuç ve değerlendirme
kısmında ise alan araştırmasından elde edilen veriler doğrultusunda değerlendirme
yapılmıştır