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2000

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Case Study : The Kjef Student Video News, John Kennedy Wickham Jan 2000

Case Study : The Kjef Student Video News, John Kennedy Wickham

Graduate Research Papers

The purpose of this study was to analyze the impact and effectiveness of a student video news project that was initiated in the fall of 1998 as the result of receiving a McElroy Trust Fund grant. A secondary purpose was to determine whether the student video news production was more effective than the traditional approach where the principal used the public address system. Three questionnaires were used to solicit input from school staff and students. The staff was surveyed in the spring of 1999 and 2000 whereas students were surveyed in December 1999 after one year of production. Results were …

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Concert Recording 2000-04-12, Katie Tuggle, Jeannie Lee, James Paynter, Jason Burrow, Mary Scott Spry, Lynsey Ratzlaff, Erin Williams, Donald Bohanon Jan 2000

Concert Recording 2000-04-12, Katie Tuggle, Jeannie Lee, James Paynter, Jason Burrow, Mary Scott Spry, Lynsey Ratzlaff, Erin Williams, Donald Bohanon

Concert Recordings & Programs

Galic suite. Procession. Elegy / Bernard Fitzgerald -- Aria con variazioni / G.F. Handel -- Premier solo, I / E. Bourdeau -- Concertino. Andante semplice. Rondo vivace / Knudage Riisager -- 3 dances for 2 flutes / Gary Schocker

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The Cytogenetic Effects Of Npyr On Mice, Mehmet Korkmaz, Ahmet Çolak Jan 2000

The Cytogenetic Effects Of Npyr On Mice, Mehmet Korkmaz, Ahmet Çolak

Turkish Journal of Biology

The effects of N-nitrosopyrrolidine (NPYR) on mice chromosomes and micronucleus induction were investigated in order to evaluate its genotoxic effects. Twenty 10-12 week old mice and 40 8- 10 week old male mice ( Mus musculus var. albinos) were used for chromosome analysis without sex discrimination and micronucleus tests respectively. Mice were intraperitoneally treated in single injections with three dose levels (100, 200 and 300 mg/kg) of NPYR with isotonic saline as the solvent vehicle. Bone marrow was sampled at 24 and 48 h postinjection. Examination of the mice bone marrow chromosomes at the metaphase (24 h) showed that in …

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Detection Of Mutagenic Effects Of 2, 4, 5 Tri (Sübstitüe) Phenyl Imidazole And Its Derivatives In Ames/Salmonella/Test System, Ayşe Mercangöz, Berri̇n Ayaz Tüylü Jan 2000

Detection Of Mutagenic Effects Of 2, 4, 5 Tri (Sübstitüe) Phenyl Imidazole And Its Derivatives In Ames/Salmonella/Test System, Ayşe Mercangöz, Berri̇n Ayaz Tüylü

Turkish Journal of Biology

The mutagenic effects of 2, 4, 5 tri-phenylimidazole and its nine different derivatives, which are aimed at producing medicine as a primary substance, were investigated by the Ames Salmonella/Microsome plate assay. The test compounds were directly effective, especially in the TA 98 strain. A relationship was found between the mutagenic effect and the positions of the methyl and methoxy groups.

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Changes In Liver Cytoplasmic Glutathione-S-Transferase And Microsomalnitrosodimethylamine Demethylase Activities In Chicks Obtainedfollowing Daminozide Treatment, Yavuz Si̇li̇ğ, V. Kenan Çeli̇k, Ati̇lla Atalay Jan 2000

Changes In Liver Cytoplasmic Glutathione-S-Transferase And Microsomalnitrosodimethylamine Demethylase Activities In Chicks Obtainedfollowing Daminozide Treatment, Yavuz Si̇li̇ğ, V. Kenan Çeli̇k, Ati̇lla Atalay

Turkish Journal of Biology

In this study, microsomal nitrosodimethylamine demethylase (NDMAd) and cytoplasmic glutathione-s-tarnsferase (GST) activities in the livers of chicks obtained from the LD 10 (3 mg/ml) and LD 30 (9 mg/ml) doses of daminozide (Succinic acid 2,2-Dimethylhydrazide) injected Ross-Pm-3 fertilized chicken eggs were investigated. Spectrophotometric determination of NDMAd activity was performed at 412 nm by the detection of yellow coloured compound formed as a product of the reaction of formaldehyde with Nash reagent. No significant increase was observed in NDMAd activity (P>0.05) of the group treated with LD 10 dose although NDMAd activity was found to be significantly increased (P

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The Use Of Random Amplified Polymorphic Dna(Rapd) Markers In Sex Discrimination In Niletilapia, Oreochromis Niloticus (Pisces: Cichlidae), Fevzi̇ Bardakci Jan 2000

The Use Of Random Amplified Polymorphic Dna(Rapd) Markers In Sex Discrimination In Niletilapia, Oreochromis Niloticus (Pisces: Cichlidae), Fevzi̇ Bardakci

Turkish Journal of Biology

Random amplified polymorphic DNA (RAPD) markers were successfully used in discrimination of sexes in Nile tilapia fish ( Oreochromis niloticus) using linear discriminant function analysis. The results provide support for the view that major genetical sex determining factors exist in tilapia.

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Morphological Changes In Xenopus Laevisembryoswith Lithium And Evaluation Of The Fetax Test, Ayper Boğa, Seçi̇l Bi̇nokay, Ayşe Kendi̇rci̇, Tuncay Özgünen, Emi̇ne Kizilkanat Jan 2000

Morphological Changes In Xenopus Laevisembryoswith Lithium And Evaluation Of The Fetax Test, Ayper Boğa, Seçi̇l Bi̇nokay, Ayşe Kendi̇rci̇, Tuncay Özgünen, Emi̇ne Kizilkanat

Turkish Journal of Biology

The main goal was to standardize the FETAX (Frog Embryos Teratogenesis Assay: Xenopus) test. Since lithium ions are known to be teratogenic for embryos of many organisms, they were prefferred for our first standardization assay. Xenopus laevis embryos were exposed to lithium chloride (from 2x10 -4 to 6 x 10 -3 M concentrations) for 96 hours at 2-4 cell stages of development. Exposure to lower LiCl concentrations permitted larvae to survive and to develop into normal ones. On the other hand, depending on the increase in the LiCl concentration, the body length and survival rate (%) decreased. In addition, the …

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The Effect Of Kinetin, Gibberellic Acid And Indoleacetic Acid On Ems-Induced Somatic Mutation Andrecombination In Drosophila Melanogaster, Eli̇f Yeşi̇lada Jan 2000

The Effect Of Kinetin, Gibberellic Acid And Indoleacetic Acid On Ems-Induced Somatic Mutation Andrecombination In Drosophila Melanogaster, Eli̇f Yeşi̇lada

Turkish Journal of Biology

The effect of plant growth hormones (kinetin, gibberellic acid (GA 3) and indole acetic acid (IAA)) on EMS-induced mutant wing spots was studied with the somatic mutation and recombination test (SMART) in Drosophila melanogaster.GA 3 reduced all kinds of EMS-induced spot. While a 10 -3 M concentration of kinetin reduced only the number of EMS-induced twin spots, a 10 -4 M concentration was seen to increase the number of all types of spot. The same concentrations of IAA gave variable results. A 10 -4 M concentration of IAA caused a decrease only in the number of large single spots. Our …

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Am1 Treatment Of Some Phenoxyacetic Acidherbicides, Lemi̇ Türker Jan 2000

Am1 Treatment Of Some Phenoxyacetic Acidherbicides, Lemi̇ Türker

Turkish Journal of Biology

AM1-type semiempirical quantum chemical calculations were carried out to explain differences in herbicidal activity between certain phenoxyacetic acid derivatives. It was found that the proper orientation and shape of the COOH group and the phenyl moiety both mutually and individually affected the observed activities.

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Increase Of The \Alpha-Amylase Yield By Some Bacillusstrains, Eli̇f Sarikaya, Veli̇tti̇n Gürgün Jan 2000

Increase Of The \Alpha-Amylase Yield By Some Bacillusstrains, Eli̇f Sarikaya, Veli̇tti̇n Gürgün

Turkish Journal of Biology

In order to obtain high amounts of \alpha-amylase enzyme from Bacillus bacteria a new medium was developed. In this medium, three strains of Bacillus bacteria were grown in the presence of different carbon, nitrogen and metal ions. The highest \alpha-amylase yield was obtained by addition of Na-citrate, strach and sucrose for the strains of B. subtilis, B. amyloliquefaciens I and B. amyloliquefaciens II, respectively. As a nitrogen source, yeast extract was found to be effective on enzyme yield for B. subtilis and B. amyloliquefaciens II, while ammonium sulfate was found to be effective for B. amyloliquefaciens I. None of the …

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Longevity In Some Wild Type And Hybrid Strains Ofdrosophila Melanogaster, Şükran Çakir, Ali̇ Ni̇hat Bozcuk Jan 2000

Longevity In Some Wild Type And Hybrid Strains Ofdrosophila Melanogaster, Şükran Çakir, Ali̇ Ni̇hat Bozcuk

Turkish Journal of Biology

It is known that aging is a multifactorial mechanism composed of both genetic and environmental components. The main evolutionary theories of aging are antagonistic pleiotropy and mutation accumulation, neither of which has substantial experimental support yet. In this study, the longevities of three wild type strains of Drosophila melanogaster and F1 hybrids derived from them were determined. Heterosis caused an increase in the adult lifespan of F1 hybrids.

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Isolation, Characterization And Identification Ofthiram-Degrading Microorganisms From Soilenrichment Cultures, Nuretti̇n Şahi̇n, Abdurrahman Üsame Tamer Jan 2000

Isolation, Characterization And Identification Ofthiram-Degrading Microorganisms From Soilenrichment Cultures, Nuretti̇n Şahi̇n, Abdurrahman Üsame Tamer

Turkish Journal of Biology

Mixed microbial cultures were obtained by enrichment from soil samples collected from the Gediz basin. A number of species of bacteria and fungi were isolated and partially characterized from enrichment clutures containing the fungicide thiram. According to their responses in morphological and biochemical tests fungi were identified as Aspergillus niger, A. flavus and Penicilium steckii. Bacterial isolates were assigned to the genera: Bacillus, Arthrobacter, Moraxella-like Acinetobacter and Streptomyces. Islates grew in a mineral salts medium containing 0.2 mg/ml thiram and no growth factors were required.

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Distributions And Possible Roles Of Laminin, Fibronectin And Theirreceptor Subunits Integrin \Beta4 And \Alpha5 In Remodelling Of Extracellularmatrix During Decidualization In Rats, Ümi̇t Ali̇ Kayişli, Mevlüt Asar, Ramazan Demi̇r Jan 2000

Distributions And Possible Roles Of Laminin, Fibronectin And Theirreceptor Subunits Integrin \Beta4 And \Alpha5 In Remodelling Of Extracellularmatrix During Decidualization In Rats, Ümi̇t Ali̇ Kayişli, Mevlüt Asar, Ramazan Demi̇r

Turkish Journal of Biology

In the endometrium preparing for pregnancy, the stromal matrix components of the cells and their products begin structural differentiation due to endometrial receptivity. According to the hypothesis that 'extracellular matrix (ECM) proteins and adhesion molecules take roles in the structural differentiation as a result of endometrial decidualization', our aim was to determine the roles of ECM molecules laminin, fibronectin and adhesion proteins integrin \alpha5 and \beta4 in the decidulization and implantation by examining the emergence and changing distribution of these proteins. In this study, five experimental groups, consisting of 40 pregnant animals on pregnancy days 4-8, were used. Paraffin tissue …

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Identification Of Lactoce Plasmids In Lactococcus Lastic Subsp. Lactisstains, Çağla Tükel, Mustafa Akçeli̇k Jan 2000

Identification Of Lactoce Plasmids In Lactococcus Lastic Subsp. Lactisstains, Çağla Tükel, Mustafa Akçeli̇k

Turkish Journal of Biology

Plasmids encoding lactic acid fermentation ability were investigated in 50 strains of L. lactis subsp. lactis. Acriflavine was used for the elimination of lactose fermentation ability (Lac + ) from wild type strains. Lactose negative (Lac - ) mutants were selected on lactose indicator agar media. Six different lactose plasmids were identified for fifty strains by comparison of plasmid profiles of Lac - and Lac + mutants. The molecular sizes of these lactose plasmids ranged between 26.3 and 38.5 kb.

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Studies On Genetic And Breeding In Sesame ( Sesamum Indicum L.)I. Inheritance Of The Characters Determining The Plant Type, Hasan Baydar, İsmai̇l Turgut Jan 2000

Studies On Genetic And Breeding In Sesame ( Sesamum Indicum L.)I. Inheritance Of The Characters Determining The Plant Type, Hasan Baydar, İsmai̇l Turgut

Turkish Journal of Biology

The inheritance of the morphogenetical characters determining the plant types, maternal and cytoplasmic effects on oleic and linoleic acids in sesame was determined. The results obtained from the F 1 generation indicated that 1) bicarpellate capsule was dominant over quadricarpellate, 2) single capsule per leaf axil was dominant over three-capsule 3) branched stem type was dominant over non-branched stem type, 4) lobed leaf shape was dominant over simple or ovate leaf shape, 5) hairiness was dominant over hairless, 6) colored seed coat color was dominant over white seed coat color. The results obtained from the F 2 generation indicated that …

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Population Dynamics Of Horse Mackerel (Trachurus Trachurus L., 1758)Stocks In The Mid Black Sea, Turkey, Şennan Yücel, İbrahi̇m Erkoyuncu Jan 2000

Population Dynamics Of Horse Mackerel (Trachurus Trachurus L., 1758)Stocks In The Mid Black Sea, Turkey, Şennan Yücel, İbrahi̇m Erkoyuncu

Turkish Journal of Biology

The aim of the present study, which was carried out on 720 individuals between October 1995 and September 1996 in the mid Black Sea region was to estimate some parameters of the population of horse mackerel (Trachurus trachurus L. 1758) including age, size, weight, sex compositions, growth and mortality rates. Ages between 0 and 7 were established in horse mackerel stock. The weight-length relationship was calculated as; W= 0.00759L 3.05 , condition factor 0.843 and the Von-Bertalanffy growth formulas were, Lt= 16.92 (1- -0.3538 (t+2.7938) ) Wt= 47.11 (1-e -0.3538 (t+2.7938) ) 3.05 . Instantaneous total mortality coefficient, natural mortality …

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Cytogenetic Effects Of Copper Chloride On The Root Tip Cells Of Viciahirsuta (L.) S. F. Gray, Hüseyi̇n İnceer, Osman Beyazoğlu Jan 2000

Cytogenetic Effects Of Copper Chloride On The Root Tip Cells Of Viciahirsuta (L.) S. F. Gray, Hüseyi̇n İnceer, Osman Beyazoğlu

Turkish Journal of Biology

The cytogenetic effects of copper chloride on root tip cells of Vicia hirsuta were investigated. Seeds were treated with 10, 25, 50 and 100 mg/L of the copper chloride for 4, 12, 24 and 48 hours. It was found that copper chloride has a marked mitodepressive action on mitosis. Mitotic abnormalities were increased and the mitotic index was decreased depending on the concentration and duration time of the copper chloride applied.

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The Effect Of Cadmium Nitrate On The Longevity Of Drosophilamelanogaster, Eli̇f Yeşi̇lada, Lütfi̇ye Gelegen Jan 2000

The Effect Of Cadmium Nitrate On The Longevity Of Drosophilamelanogaster, Eli̇f Yeşi̇lada, Lütfi̇ye Gelegen

Turkish Journal of Biology

The effect of cadmium nitrate on the longevity of Drosophila melanogaster was tested. When cadmium nitrate was given throughout the adult life it caused a decrease in the mean life-span of flies in all treated groups. Furthermore, the effect of cadmium nitrate on young populations was also compared with aged populations. The young populations survived longer than aged populations with the food medium containing cadmium nitrate.

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The Isolation And Characterization Of Glucoamylase Enzyme Of Anaspergillus Niger Natural Isolate, Gökhan Coral, Ömer Çolak Jan 2000

The Isolation And Characterization Of Glucoamylase Enzyme Of Anaspergillus Niger Natural Isolate, Gökhan Coral, Ömer Çolak

Turkish Journal of Biology

An extracellular glucoamylase enzyme was isolated from Aspergillus niger Z10 natural isolate in a liquid Czapek Dox medium which contained soluble starch (2%) as the sole carbon source. The molecular weight of the enzyme was found to be about 100.000 Daltons through Starch-SDS Polyacrylamide Gel Electrophoresis. The optimal pH range of the enzyme was found to be 4.5-5.5 and it was determined that the thermal stability of this enzyme is quite high.

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The Seasonal Variation In Total Lipid And Fatty Acid Contents Of Thegonads Of Cyprinion Macrostomus (Heckel, 1843), Kubi̇lay Meti̇n, Mehmet Ali̇ Akpinar Jan 2000

The Seasonal Variation In Total Lipid And Fatty Acid Contents Of Thegonads Of Cyprinion Macrostomus (Heckel, 1843), Kubi̇lay Meti̇n, Mehmet Ali̇ Akpinar

Turkish Journal of Biology

The seasonal variation in total lipid and total fatty acid contents of the gonads of Cyprinion macrostomus(HECKEL, 1843) living in the Topardiç Brook (Kangal-Sivas) were investigated. It was observed that the variations in the gonad weights and the amount of total lipid and total fatty acid in the gonad of the male and female fish were more noticeable especially at the time of gonad development and the spawning period. The total lipid and total fatty acid amount which increased during the spawning period showed a decrease at the end of this period.

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Germin, An Oxalate Oxidase, Has A Function In Manyaspects Of Plant Life, Mahmut Çalişkan Jan 2000

Germin, An Oxalate Oxidase, Has A Function In Manyaspects Of Plant Life, Mahmut Çalişkan

Turkish Journal of Biology

Germin, a molecular marker of wheat embryo germination, is a remarkably protease-resistant, apoplastic, homopentameric glycoprotein. Different forms of germin found to be related to various aspects of plant development have been discovered. Germins were determined in cereals, dicotyledonous angiosperms, gymnosperms and in a prosit, all these proteins are together called germin-like proteins due to their DNA sequence homology. Cereal germins have oxalate oxidase activity, an activity which generates hydrogen peroxide by degrading oxalic acid. Both of these molecules have been implied in the regulation of cell development, differentiation, signalling and defence systems of plants. The germin-like proteins found in dicotyledonous …

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Cultural Characteristics Of Morchella Esculentamycelium On Some Nutrients, Peri̇han Güler, Oğuz Arkan Jan 2000

Cultural Characteristics Of Morchella Esculentamycelium On Some Nutrients, Peri̇han Güler, Oğuz Arkan

Turkish Journal of Biology

The cultural characteristics of Morchella esculenta mycelium were investigated in potato dextrose agar, malt extract agar and complete medium yeast plates prepared with casein (cas), Casamino Acids (caa), peptone (p) and sodium nitrate (NaNO 3 ). Aerial and vegetative mycelium types were determined in the agar media with cas, caa and p. The third colonial characteristic was observed in the agar media with NaNO 3 . In this media, a colonization increase in circular forms spreading from the centre to the edges was determined. Mycelium colonization periods were 20-24 days in agar media with NaNO 3 .

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Bacteriocin Typing Of Some Turkish Isolates Ofpseudomonas Syringae Pv. Phaseolicola, Kiymet Güven Jan 2000

Bacteriocin Typing Of Some Turkish Isolates Ofpseudomonas Syringae Pv. Phaseolicola, Kiymet Güven

Turkish Journal of Biology

Eighty-six Pseudomonas syringae pv. phaseolicola isolates collected from different bean growing areas in Eskişehir were typed for the production of bacteriocin.All the isolates tested produced bacteriocin and 24 bacteriosin groups were determined. No correlation was found between the bacteriocin groups and geographical origin. Authentic isolates of the bacterium representing 3 different races were also tested for bacteriocin production and bacteriocin types did not correlate with the races.

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Availibility Of Use Of Total Extracellular Proteins Insds-Page For Characterization Of Gram-Positive Cocci, Sefa Can Saçilik, Özlem Osmanağaoğlu, Ufuk Gündüz, Cumhur Çökmüş Jan 2000

Availibility Of Use Of Total Extracellular Proteins Insds-Page For Characterization Of Gram-Positive Cocci, Sefa Can Saçilik, Özlem Osmanağaoğlu, Ufuk Gündüz, Cumhur Çökmüş

Turkish Journal of Biology

There are no reports in the literature dealing with gram-positive cocci typing by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) of extracellular proteins. In this study, Staphylococcus aureus, Staphylococcus warneri, Staphylococcus chromogenes, Micrococcus lysodeikticus and Micrococcus ssp. of the Micrococcaceae family, and Pediococcus halophilus, Streptococcus ssp. and Enterococcus faecalis of the Streptococcaceae family were characterized by SDS-PAGE of whole cell proteins (WCPs) and total extracellular proteins (TEPs). Comparison of SDS-PAGE of WCP profiles with banding patterns produced by that of TEPs provided additional criteria and characteristic banding patterns for the study of the characterization of gram-positive cocci. This method was found …

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The Possibility Of Using Crustacean Waste Products(Cwp) On Rainbow Trout ( Oncorhynchus Mykiss)Feeding, Yeşi̇m Özoğul Jan 2000

The Possibility Of Using Crustacean Waste Products(Cwp) On Rainbow Trout ( Oncorhynchus Mykiss)Feeding, Yeşi̇m Özoğul

Turkish Journal of Biology

Crustacean waste product (CWP) generated from the fishing industry could be used in diets for rainbow trout as an alternative animal protein. Some experiments have been undertaken with penaid species, showing that it is possible to partially replace fish meal with CWP in penaid feeds. This study has been designed to assess whether CWP could be used to partially replace fish meal in diets for rainbow trout. The results show that CWP improved the digestibility of the diet, yielding the highest performance, and also that the addition of large amounts of CWP to a low-protein diet did not depress appetite. …

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Cover And Contents Jan 2000

Cover And Contents

Turkish Journal of Biology

No abstract provided.

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Humerus Primer Ossification Zone Development In Rat Fetuses: A Histological And Histochemical Study, İsmai̇l Üstünel, Gökhan Akkoyunlu, Erdoğan Kocamaz, Ramazan Demi̇r Jan 2000

Humerus Primer Ossification Zone Development In Rat Fetuses: A Histological And Histochemical Study, İsmai̇l Üstünel, Gökhan Akkoyunlu, Erdoğan Kocamaz, Ramazan Demi̇r

Turkish Journal of Biology

In this investigation of the primary ossification zones of 14-18 day-old fetal rat humeri by histological, histochemical and histoenzymatical methods, 30 rat fetuses of the species Rattus norvegicus were used. The humeral diaphysis samples of the fetuses were subjected to alcian blue-heamatoxylin, periodic acid Schiff (PAS)-heamatoxylin, alcian blue-PAS-heamatoxylin, alizarin red and toluidine blue, alkaline phosphatase (ALP), adenosine triphosphatase (ATPase) and acid phophatase (ACP) staining techniques. The results can be summarized as follows: On day 14, no ossification signs were evident yet, whereas on day 15, the initiation of degenerations in some chondrocyte cytoplasms and the formation of osteoblastic cells on …

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Determination Of Organophosphate Resistance-Dependent Over-Produce Esterase Allel Type With Electrophoresis In The Malaria Vector Species Anopheles Sacharovi And Culex Pipiens (Diptera: Culicidae), Ümi̇t Lüleyap, Davut Alpteki̇n, Hali̇l Kasap, Mülki̇ye Kasap Jan 2000

Determination Of Organophosphate Resistance-Dependent Over-Produce Esterase Allel Type With Electrophoresis In The Malaria Vector Species Anopheles Sacharovi And Culex Pipiens (Diptera: Culicidae), Ümi̇t Lüleyap, Davut Alpteki̇n, Hali̇l Kasap, Mülki̇ye Kasap

Turkish Journal of Biology

In this study, over-produce esterase allele types dependent on organophosphate resistance in mosquitoes were determined by cellulose acetate gel electrophoresis in the human malaria vector species Anopheles sacharovi and Culex pipiens in Çukurova (Adana). We found A_2 and A_5 allele bands with some unknown and unidentified gel bands in some An. sacharovi field samples, of which some bands seemed to match with over-produce esterase. We identified A_2-B_2 allele types for all the Cx. pipiens samples collected in this study.

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Effects Of Endosulfan On The Isolated Sciatic Nerve Of The Frog, Ülkü Çömelekoğlu, Belgi̇n Büyükakilli, Aynur Avci Özge Jan 2000

Effects Of Endosulfan On The Isolated Sciatic Nerve Of The Frog, Ülkü Çömelekoğlu, Belgi̇n Büyükakilli, Aynur Avci Özge

Turkish Journal of Biology

The purpose of this study was to investigate the effect of endosulfan on the isolated sciatic nerve of the frog. The nerve was exposed to 0.5 ppm endosulfan for 60 min and then compound action potentials were recorded extracellulary. The latencies, amplitudes, durations of depolarization and repolarization and threshold voltage were measured (n=30). Conduction velocities were calculated using the nerve lengths and latency values of each nerve. It was observed that values of amplitude and duration of repolarization were significantly higher (p

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Distance Spectra For Trellis Coded Modulation Schemes On Channels With Intersymbol Interference, Sabi̇re Haciömeroğlu, Melek D. Yücel Jan 2000

Distance Spectra For Trellis Coded Modulation Schemes On Channels With Intersymbol Interference, Sabi̇re Haciömeroğlu, Melek D. Yücel

Turkish Journal of Electrical Engineering and Computer Sciences

The effect of intersymbol interference on distance spectra for trellis coded 8-PSK, 16-QAM and 32-AMPM modulation schemes is evaluated using the methods proposed by Schlegel. Distance spectra of 16-state 8-PSK scheme are computed for different intersymbol interference channels. It is seen that on channels with intersymbol interference the spectral lines are spread into a nearly continuous spectrum and the minimum Euclidean distance between codewords decreases severely. Hence, although the main contribution at large signal to noise ratios comes from the minimum Euclidean distance ( d_{free} ) , higher spectral components also become very important at moderate values of the signal …

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