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2001

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Articles 1801 - 1830 of 2477

Full-Text Articles in Life Sciences

Floristical Characteristics Of Berit Dağı (Kahramanmaraş), Bayram Yildiz Jan 2001

Floristical Characteristics Of Berit Dağı (Kahramanmaraş), Bayram Yildiz

Turkish Journal of Botany

In this article, the floristical characteristics of Berit Dağı (Berit Mountain) are given and the vascular plant species growing there are documented. Berit Dağı is situated in the north-west of Kahramanmaraş province and at the south of Anatolian diagonal. It is in the transitional zone of the Irano-Turanian and Mediterranean phytogeographical regions. The research was carried out between 1977 and 1981. Approximately 2500 plant specimens were collected from the area. At the end of the study, 1132 vascular plant species (1165 taxa) belonging to 97 families and 462 genera were identified. Of these, 200 (17.6%) species are endemic to Turkey. …


A New Species Of Ribes L. (Grossulariaceae) From East Anatolia, Turkey, Lütfi̇ Behçet Jan 2001

A New Species Of Ribes L. (Grossulariaceae) From East Anatolia, Turkey, Lütfi̇ Behçet

Turkish Journal of Botany

Ribes anatolica Behçet is described and illustrated as a new species (Grossulariaceae) from East Anatolia, Turkey.


Heavy Metal Accumulation And Detoxification Mechanisms In Plants, Abdul R. Memon, Di̇ğdem Aktoprakligi̇l, Ayli̇n Özdemi̇r, Anastassiia Vertii Jan 2001

Heavy Metal Accumulation And Detoxification Mechanisms In Plants, Abdul R. Memon, Di̇ğdem Aktoprakligi̇l, Ayli̇n Özdemi̇r, Anastassiia Vertii

Turkish Journal of Botany

Toxic metal contamination of soil, aqueous waste streams and groundwater causes major environmental and human health problems. The most commonly used methods for dealing with heavy metal pollution are still extremely costly. Phytoremediation is the use of plants to extract, sequester and/or detoxify pollutants and is a new and powerful technique for environmental clean-up. Plants are ideal agents for soil and water remediation because of their unique genetic, biochemical and physiological properties. Considerable advances have been made in recent decades in developing endemic or genetically engineered plants for the remediation of environmental clean-up. In the present review, current knowledge about …


The Effects Of Different Mineral Nutrients On The Levels Of Cytokinins In Maize (Zea Mays L.), Peyami̇ Battal, Beki̇r Ti̇lekli̇oğlu Jan 2001

The Effects Of Different Mineral Nutrients On The Levels Of Cytokinins In Maize (Zea Mays L.), Peyami̇ Battal, Beki̇r Ti̇lekli̇oğlu

Turkish Journal of Botany

In this study, Z (trans-Zeatin) and ZR (trans-Zeatin Riboside) levels in the roots, stems, leaves, flowers and fruits of maize plants (Zea mays L.) were determined using high performance liquid chromatography (HPLC). Plants were grown in media containing macro elements (nitrogen, phosphorus, potassium, calcium, magnesium, sulphur and iron) in optimum, deficient and excess concentrations. According to the average Z values for all periods, the highest Z levels were determined in the roots of plants treated with excessive P (-P); in stems, female flowers treated with excessive K (-K) and in leaves and kernels treated with excessive Ca (-Ca). The highest …


A Study On The Autecology Of Reseda Lutea L. (Resedaceae) Distributed In Western Anatolia, Yunus Doğan Jan 2001

A Study On The Autecology Of Reseda Lutea L. (Resedaceae) Distributed In Western Anatolia, Yunus Doğan

Turkish Journal of Botany

The aim of this study was to determine the autecological characteristics of Reseda lutea L. (Resedaceae) distributed in Western Anatolia. The chemical and physical analysis was carried out on soil and plant samples collected from 54 different localities in Western Anatolia. The results show that the plant generally prefers sandy-loam and sandy-clayey-loam textural soils, with a slightly alkaline or medium alkaline pH. They prefer non-saline, calcareous soils which are poor in potassium and phosphorus, but the nitrogen content of the soils was found to vary greatly. The soil and plant analysis results were evaluated statistically and correlations were established.


New Floristic Records On Dicotyledones For The Square B9 (Özalp-Van) From Turkey, Fevzi̇ Özgökçe Jan 2001

New Floristic Records On Dicotyledones For The Square B9 (Özalp-Van) From Turkey, Fevzi̇ Özgökçe

Turkish Journal of Botany

No abstract provided.


New Floristic Records On Dicotyledones For The Square B10 (Özalp-Van) From Turkey, Fevzi̇ Özgökçe, Lütfi̇ Behçet Jan 2001

New Floristic Records On Dicotyledones For The Square B10 (Özalp-Van) From Turkey, Fevzi̇ Özgökçe, Lütfi̇ Behçet

Turkish Journal of Botany

No abstract provided.


New Floristic Records For The Square C3 (Seydişehir-Konya, Turkey), Memduh Seri̇n, Murad Aydin Şanda, Fahretti̇n Bati Jan 2001

New Floristic Records For The Square C3 (Seydişehir-Konya, Turkey), Memduh Seri̇n, Murad Aydin Şanda, Fahretti̇n Bati

Turkish Journal of Botany

No abstract provided.


New Floristic Records For The Grid Square B3 Uluborlu - Isparta, Turkey, Gönül Kaynak, Gül Tarimcilar Jan 2001

New Floristic Records For The Grid Square B3 Uluborlu - Isparta, Turkey, Gönül Kaynak, Gül Tarimcilar

Turkish Journal of Botany

No abstract provided.


The Liverwort Flora Of Antarctica (2000), Adnan Erdağ Jan 2001

The Liverwort Flora Of Antarctica (2000), Adnan Erdağ

Turkish Journal of Botany

No abstract provided.


Epipelic And Epilithic Algae Of Değirmendere River (Trabzon-Turkey), Hülya Kara, Bülent Şahi̇n Jan 2001

Epipelic And Epilithic Algae Of Değirmendere River (Trabzon-Turkey), Hülya Kara, Bülent Şahi̇n

Turkish Journal of Botany

The algae of Değirmendere River were investigated in the samples collected from different habitats (epipelic, epilithic) in five stations between October 1998 and September 1999. The flora consisted of 74 taxa belonging to Bacillariophyta (52), Chlorophyta (10), Cyanophyta (9) and Euglenophyta (3). Bacillariophyta was dominant in the algal flora. Aulacosira varians Ag. (Coscinodiscaceae), Amphora ovalis Kütz. (Cymbellaceae), Cocconeis placentula var. euglypta (Ehr.) Cleve (Achnanthaceae), Ceratoneis arcus Kütz. (Fragilariaceae), Cymbella minuta Hilse ex Rabh. (Cymbellaceae), Didymosphenia geminata (Lyngb.) M. Schmidt. (Gomphonemaceae), Navicula odiosa Wallace (Naviculaceae), Surirella ovata Kütz. (Surirellaceae) and Synedra ulna (Nitzsch) Ehr. (Fragilariaceae) were the most common taxa in …


Epipelic And Epilithic Algae Of Dağbaşı Lake (Rize-Turkey), Bülent Şahi̇n Jan 2001

Epipelic And Epilithic Algae Of Dağbaşı Lake (Rize-Turkey), Bülent Şahi̇n

Turkish Journal of Botany

Epipelic and epilithic algae of Dağbaşı lake were studied qualitatively between June and September 1988. The algal flora was found to consist of 103 species, 53 belonging to Bacillariophyta, 31 to Chlorophyta, 15 to Cyanophyta and 4 to Euglenophyta.


The Flora Of Kelkit Valley, Fergan Karaer, Mahmut Kilinç Jan 2001

The Flora Of Kelkit Valley, Fergan Karaer, Mahmut Kilinç

Turkish Journal of Botany

The flora of Kelkit Valley was investigated between 1990 and 1993. In the vegetation period, a total of 2800 plant specimens were collected. At the end of the study, 1316 species and subspecies and 519 genera belonging to 105 families were established. Of these, 132 taxa are endemic to Turkey and the ratio is 10.03%. The rates of taxa which are included in certain phytogeographical regions are as follows: Irano-Turanian 14.75%, Euro-Siberian 12.69% and Mediterranean 11.40%.


New Hieracium L. (Asteraceae) Records For The Flora Of Turkey, Kami̇l Coşkunçelebi̇, Osman Beyazoğlu Jan 2001

New Hieracium L. (Asteraceae) Records For The Flora Of Turkey, Kami̇l Coşkunçelebi̇, Osman Beyazoğlu

Turkish Journal of Botany

Two Hieracium L. (Asteraceae) species from the NE Anatolia are described as a new records for the Flora of Turkey.


The Diagnosis Of Antibodies Against Newcastle Disease Virus By Hi And Elisa Tests In Vaccinated Chickens, Nejat Aydin, Hakan Yardimci, K. Semi̇h Gümüşsoy, Belgi̇n Erdem Jan 2001

The Diagnosis Of Antibodies Against Newcastle Disease Virus By Hi And Elisa Tests In Vaccinated Chickens, Nejat Aydin, Hakan Yardimci, K. Semi̇h Gümüşsoy, Belgi̇n Erdem

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was to determine serum antibody levels against the Newcastle disease virus in vaccinated chicken flocks in addition to experimental animals by hemagglutination inhibition (HI)test and enzyme linked immunosorbent assay (ELISA) and compare the results. Methanol-precipitated antigen prepared from the LaSota strain of Newcastle disease virus was used with peroxidase-labelled rabbit anti-chicken IgG as a conjugate and ortho-phenylenediamine as a substrate in ELISA. The negative threshold was found to be an optical density of 0.19 (OD)at a 490-nm wavelength.In addition to the 50 experimental animals, a total of 504 chicken sera (broiler,layer and breeder flocks)collected from …


Prevalence Of Cryptosporidium Spp. Oocysts In Diarrhoeic Calves In Kars Province, Turkey, M. Özkan Arslan, Yunus Gicik, H. Meti̇n Erdoğan, Bariş Sari Jan 2001

Prevalence Of Cryptosporidium Spp. Oocysts In Diarrhoeic Calves In Kars Province, Turkey, M. Özkan Arslan, Yunus Gicik, H. Meti̇n Erdoğan, Bariş Sari

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to determine the prevalence of Cryptosporidium spp. oocysts in diarrhoeic calves in Kars province. The study was conducted between February 1999 and June 1999, involving 140 diarrhoeic calves from 8 different localities (Kars-Central district, Karakaş, Bulanık, Karakale, Hacıhalil, Boğazköy, Susuz-Central district, and Arpaçay). These localities were visited once during the study period, and fresh faecal samples were taken from the rectums of the calves up to 3 months old. Faecal samples were centrifuged and the resulting sediments were smeared on glass slides. The slides were stained by the modified acid-fast technique and examined under light …


The Distribution Of Nitric Oxide Synthase In The Rat Spinal Cord, Mümtaz Nazli, Richard Morris Jan 2001

The Distribution Of Nitric Oxide Synthase In The Rat Spinal Cord, Mümtaz Nazli, Richard Morris

Turkish Journal of Veterinary & Animal Sciences

Since the proposal that nitric oxide acts as an intercellular signalling molecule in the nervous system, a large number of studies have been carried out to determine its functions in neural tissue. In this study, neuronal nitric oxide synthase using the highly specific polyclonal nature of an antibody is observed mainly in laminae I-II_i, lamina X and in the intermediolateral cell column of the thoraco-lumbar spinal cord. The distribution of neuronal nitric oxide synthase was confirmed and extended the work done in previous studies. Distinct concentrations of neuronal nitric oxide synthase expressing small to medium sized neurones were seen in …


Determination Of Antibody Production By Ifat And Elisa In Rainbow Trout (Oncorhynchus Mykiss) Immunized By Yersinia Ruckeri Bacterin, Ayşegül Kubi̇lay, Gülşen Ti̇mur Jan 2001

Determination Of Antibody Production By Ifat And Elisa In Rainbow Trout (Oncorhynchus Mykiss) Immunized By Yersinia Ruckeri Bacterin, Ayşegül Kubi̇lay, Gülşen Ti̇mur

Turkish Journal of Veterinary & Animal Sciences

In this study, the induced antibody level of rainbow trout immunized by Yersinia ruckeri bacterin was determined using two serological techniques, namely, indirect fluorescent antibody (IFAT) and enzyme-linked immunosorbent assay (ELISA). The induced humoral antibody levels were studied after intraperitonal injection of Yersinia ruckeri bacterin inoculates containing Freund's incomplete adjuvant or PBS in rainbow trout during the experimental period of 20 weeks. The control and experimental groups each contained 20 fish. The group which was immunized by the PBS containing bacterin inoculate received a booster injection. Experiments were carried out in 11-12°C water. Low antibodies titres were detected by ELISA …


Screening Of Some Turkish Plants For Antibacterial Activity, Oya Keleş, Seyyal Ak, Tülay Bakirel, Keri̇m Alpinar Jan 2001

Screening Of Some Turkish Plants For Antibacterial Activity, Oya Keleş, Seyyal Ak, Tülay Bakirel, Keri̇m Alpinar

Turkish Journal of Veterinary & Animal Sciences

Some 14 ethanol extracts from 13 plant species collected from various regions of Turkey were assayed for in vitro antibacterial activity against two Gram positive and 5 Gram negative bacteria, using the disc-diffusion and dilution methods. The diameter of the inhibition zone in the disc-diffusion method shows that 12 extracts from the 14 plants studied have antibacterial activity in different levels. The broadest spectrum of activity was exhibited by Malva sylvestris against five bacteria, whereas the Verbascum spp. extract only showed activity against one. The highest antibacterial activity was produced by the extract of Hypericum perforatum. The minimum inhibitory concentration …


In Vitro Antibacterial Activities Of Tilmicosin And Cefquinome Alone Or In Combination Against Certain Poultry Pathogens, Seyyal Ak, Oya Keleş, Tülay Bakirel Jan 2001

In Vitro Antibacterial Activities Of Tilmicosin And Cefquinome Alone Or In Combination Against Certain Poultry Pathogens, Seyyal Ak, Oya Keleş, Tülay Bakirel

Turkish Journal of Veterinary & Animal Sciences

The antimicrobial activities of cefquinome and tilmicosin were determined in vitro against P. multocida and O. rhinotracheale of poultry origin by serial broth macrodilution. Both antibiotics exhibited good in vitro antibacterial activity against the strains tested. The minimum inhibitory concentration (MIC) for cefquinome was 1.562 µg/ml and for tilmicosin was 0.78 µg/ml for both microorganisms. To investigate the effects of a combination of cefquinome and tilmicosin, the fractional inhibitory concentration (FIC) index was determined by checkerboard assay. The antimicrobial combination was additive against P. multocida (FIC=1) and indifferent against O. rhinotracheale (FIC=2).


Comparison Of Ovine Spermatozoal Morphological Features After Staining Of Fixation And Assessment Of Morphological Abnormalities In Dead/Live Spermatozoa, Yavuz Öztürkler, Alper Baran, Mi̇that Evecen, Kemal Ak, İ. Kamuran İleri̇ Jan 2001

Comparison Of Ovine Spermatozoal Morphological Features After Staining Of Fixation And Assessment Of Morphological Abnormalities In Dead/Live Spermatozoa, Yavuz Öztürkler, Alper Baran, Mi̇that Evecen, Kemal Ak, İ. Kamuran İleri̇

Turkish Journal of Veterinary & Animal Sciences

The objectives of this study were to (i) compare the effects of two staining techniques and one fixative solution on the morphological features of ram spermatozoa and (ii) evaluate the morphological features of dead/live spermatozoa by using Eosin-Nigrosin staining. The morphological features of raw spermatozoa were evaluated (by Phase Contrast microscopy) after staining with Eosin-Nigrosin mixture or Nigrosin (alone), or after fixation with Hancock's buffered formol saline solution. 42 raw pooled semen samples from 6 Kıvırcık rams were used. The percentages of spermatozoa with abnormal acrosomes and total morphological abnormalities averaged 3.97% and 14.78% in Hancock's solution, compared with averages …


A Case Of Death In A Foal Caused By Salmonella Typhimurium, N. Yakut Özgür, Toru Anzai, Babür Cari̇oğlu, Funda Bağcigi̇l, Serkan İki̇z, Ati̇lla Ilgaz Jan 2001

A Case Of Death In A Foal Caused By Salmonella Typhimurium, N. Yakut Özgür, Toru Anzai, Babür Cari̇oğlu, Funda Bağcigi̇l, Serkan İki̇z, Ati̇lla Ilgaz

Turkish Journal of Veterinary & Animal Sciences

In this report, the isolation of a Salmonella typhimurium strain as pure culture from abcess foci on the liver, spleen, kidney, stomach and intestines, and lungs of an 8-month-old, male, Thoroughbred foal, which had died in a racehorse breeding farm, is presented. Heavy respiratory infection and prolonged antibiotic therapy were considered to be stress factors that played a significant role in this case.


Rapid Identification Of Avian Salmonella Isolates By Air Thermal Cycler Amplification And Capillary Gel Electrophoresis, K. Tayfun Çarli, Vi̇ldan Caner, Ayşegül Eyi̇gör Jan 2001

Rapid Identification Of Avian Salmonella Isolates By Air Thermal Cycler Amplification And Capillary Gel Electrophoresis, K. Tayfun Çarli, Vi̇ldan Caner, Ayşegül Eyi̇gör

Turkish Journal of Veterinary & Animal Sciences

The possible use of a genus-specific polymerase chain reaction (PCR) for the identification of Salmonella colonies was tested on 14 reference strains and 38 clinical Salmonella strains isolated from chickens by the standard method of the National Poultry Improvement Plan and Auxiliary Provisions (NPIP), USDA, U.S.A. All the PCRs using primer pairs InvA1 and InvA2 (5) gave 281 bp amplification product specific for the Salmonella genus and produced results identical (100%) to those obtained with biochemical and serological methods. Thus, the genus-specific capillary PCR for the identification of a colony of Salmonellae from a selective agar plate was performed within …


The Effect Of Dietary Phytase Supplementation At Different Levels On Tibial Bone Characteristics And Strength In Broilers, Neşe Kocabağli Jan 2001

The Effect Of Dietary Phytase Supplementation At Different Levels On Tibial Bone Characteristics And Strength In Broilers, Neşe Kocabağli

Turkish Journal of Veterinary & Animal Sciences

The influence of various levels of supplemental phytase on P and Ca availability was investigated using morphometric indices and the bone strength of tibiotarsi in broilers. Forty tibiotarsi were used from the Ross 308 male broilers fed corn-soybean meal based diets. Dietary treatments were: 1) Control: diet with DCP, 2) Negative control: control diet without DCP, 3) Control diet + 300 U of phytase/kg, 4) Control diet + 500 U of phytase/kg, 5) Control diet + 700 U of phytase/kg. There were no significant differences among the groups in the mean for tibiotarsal weight and length and also for the …


The Effect Of Starter Culture Use In Pastırma Production On The Properties Of End Product, Muhammet İrfan Aksu, Mükerrem Kaya Jan 2001

The Effect Of Starter Culture Use In Pastırma Production On The Properties Of End Product, Muhammet İrfan Aksu, Mükerrem Kaya

Turkish Journal of Veterinary & Animal Sciences

The effects of three different starter preparations (Staphylococcus carnosus, Staphylococcus carnosus + Lactobocillus pentosus and Staphylococcus xylosus + Lactobacillus sakei) on the end product of pastırma were investigated. In the production of pastırma samples, dry curing was performed using NaCl, KNO_3, glucose and saccarose, and starter culture was added together with curing compounds to the meat. The starter culture used affected the counts of total aeophilic mesophilic Micrococcus/Staphylococcus and lactic acid bacteria. The Enterobacteriaceae counts were generally found to be below the detectable level (


Morphology Of The Spinal Cord In The Chicken, Duck And Pigeon, R. Meri̇h Haziroğlu, İ. Önder Orhan, Di̇nçer Yildiz, M. Erdem Gülti̇ken Jan 2001

Morphology Of The Spinal Cord In The Chicken, Duck And Pigeon, R. Meri̇h Haziroğlu, İ. Önder Orhan, Di̇nçer Yildiz, M. Erdem Gülti̇ken

Turkish Journal of Veterinary & Animal Sciences

The morphology of the spinal cord in 15 chickens, 15 ducks and 15 pigeons obtained from the Ankara region were examined. The spinal cord consisted of 15 cervical, 7 thoracic, 14 lumbosacral and 5 coccygeal segments (a total of 41 segments) in the chickens; 15 cervical, 8 thoracic, 16 lumbosacral and 5 coccygeal segments (a total of 44 segments) in the ducks and 13 cervical, 6 thoracic, 13 lumbosacral and 5 coccygeal segments (a total of 37 segments) in the pigeons. The cervical enlargement was composed of cervical segments 13-15 and thoracic segments 1-2 in the chickens; cervical segments 12-15 …


Production Characteristics Of Chios X Akkaraman F1 And B1 Crossbred Lambs. Ii. Fattening Performance, Slaughter And Carcass Characteristics, Fi̇kret Esen, Orhan Özbey Jan 2001

Production Characteristics Of Chios X Akkaraman F1 And B1 Crossbred Lambs. Ii. Fattening Performance, Slaughter And Carcass Characteristics, Fi̇kret Esen, Orhan Özbey

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to investigate the fattening performance, and slaughter and carcass characteristics of Chios x Akkaraman F_1 and B_1 crossbred lambs. The data for the fattening study were obtained from 8 F_1 and 10 B_1 crossbred lambs. Five male lambs from each genotype were slaughtered to determine the slaughter and carcass characteristics. Lambs were fed with alfalfa hay and concentrates ad libitum in the fattening period. During the fattening period, the average daily live weight gains in crossbred F_1 and B_1 groups were 238.04 g and 232.07 g, and the amount of consumed concentrate feeds for 1 …


Studies On Sediment Toxicity Bioassays Using Chironomus Thummi K., 1911 Larvae, Levent Bat, Mehmet Akbulut Jan 2001

Studies On Sediment Toxicity Bioassays Using Chironomus Thummi K., 1911 Larvae, Levent Bat, Mehmet Akbulut

Turkish Journal of Zoology

The acute toxicity of zinc, copper and lead to freshwater dipteran Chironomus thummi larvae was evaluated by static bioassays, calculating the LC_{50} (lethality concentration for 50%). Mortality increased with increasing concentrations of zinc, copper and lead. The LC_{50}s of Zn, Cu and Pb for survival were 11.2, 19.1 and 14.3 µg g^{-1}, respectively. The results indicated that Zn had the greatest toxicity, followed by Pb and Cu. Individual weight increased with increasing Cu, Zn and Pb concentrations. The results are discussed and compared with those of other studies.


The Effects Of Precocene Ii On The Fine Structure Of Corpus Allatum In Adult Female Anacridium Aegyptium L. (Orthoptera, Acrididae), Gürsel Ergen Jan 2001

The Effects Of Precocene Ii On The Fine Structure Of Corpus Allatum In Adult Female Anacridium Aegyptium L. (Orthoptera, Acrididae), Gürsel Ergen

Turkish Journal of Zoology

In this study, the effects of the antijuvenile hormone Precocene II on the corpus allatum of adult females of Anacridium aegyptium L. (Orthoptera) were investigated with electron microscopy. In the insects, topically treated with 500 µg precocene II, the corpora allata did not show marked atrophy or destruction. After 10 or 20 days of precocene II treatment, the ultrastructural changes of especially the nuclei, mitochondria, endoplasmic reticulum membranes, Golgi complexes and some other intracellular organelles in the gland cells, probably reflect a moderate sensitivity to this compound.


A Study On The Ornithofauna Of Doğancı Pond In Alpu-Eskişehir, Eli̇f Erdoğdu Jan 2001

A Study On The Ornithofauna Of Doğancı Pond In Alpu-Eskişehir, Eli̇f Erdoğdu

Turkish Journal of Zoology

This study was carried to determine the ornithofauna of Doğancı Pond and vicinity, which is located in the Alpu District of Eskişehir province. The study area, which is situated on one of the migration routes for birds, has a natural pond and wetlands occurring around the pond during spring and fall. In the study period from August 1996 to August 1997, 86 species and 1 subspecies belonging to 36 families from 13 orders were identified in the area.