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Embryo Culture In Barley (Hordeum Vulgare L.), Betül Bürün, Esi̇n Çoban Poyrazoğlu Jan 2002

Embryo Culture In Barley (Hordeum Vulgare L.), Betül Bürün, Esi̇n Çoban Poyrazoğlu

Turkish Journal of Biology

The effects of medium and sterilization on the mature embryo culture of barley (Hordeum vulgare L.) were studied. Among the different media used, the highest plantlet development from embryos was obtained in Randolph and Cox medium (92.1%), followed by Murashige and Skoog (MS) (91.3%), half-strength MS (1/2 MS) (87.7%) and B5 (85.7%). Among the sterilization methods studied, sodium hypochlorite sterilization followed by treatment of antibiotic solution and sterilization HgCl_2 application was found to be more effective than the other methods. However, no statistically significant negative effect of HgCl_2 on the plantlet development from embryos was observed.

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Alkaliphilic Micro-Organisms And Habitats, Zeynep Ulukanli, Meti̇n Diğrak Jan 2002

Alkaliphilic Micro-Organisms And Habitats, Zeynep Ulukanli, Meti̇n Diğrak

Turkish Journal of Biology

Alkaline environments are typical extreme environments which include naturally occurring soda lakes, deserts, soils and artificially occurring industrial-derived waters. Micro-organisms that occupy extreme pH environments have resulted in the definition of an unusual group, termed alkaliphiles. In this review, the current status of the biodiversity of alkaliphilic micro-organisms in various environments and aspects of their biotechnological potential are summarised briefly.

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Purification And Determination Of The Molecular Structure Of Hemolymph Lectin Of Agrotis Segetum (Denis And Schiff.), Nursel Gül, Cevat Ayvali Jan 2002

Purification And Determination Of The Molecular Structure Of Hemolymph Lectin Of Agrotis Segetum (Denis And Schiff.), Nursel Gül, Cevat Ayvali

Turkish Journal of Biology

A soluble lectin was purified from the hemolymph of Agrotis segetum by two methods, via affinity chromatography on a Sepharose-4B column and gel filtration on a Superdex-200 column. Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis (SDS-PAGE) showed a single protein band with a molecular weight of 69,000 in both the presence and absence of 2-Mercaptoethanol. Alternatively, the molecular weight of this lectin was estimated to be 69,000 by gel filtration on Superdex-200. Electron microscopic observation of the purified lectin was reticular in structure and consisted of tandem aligned spherical basic units.

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Effects Of Subchronic Treatment Of Some Plant Growth Regulators On Serum Enzyme Levels In Rats, İsmai̇l Çeli̇k, Hanefi̇ Özbek, Yasi̇n Tülüce Jan 2002

Effects Of Subchronic Treatment Of Some Plant Growth Regulators On Serum Enzyme Levels In Rats, İsmai̇l Çeli̇k, Hanefi̇ Özbek, Yasi̇n Tülüce

Turkish Journal of Biology

The effects of a sublethal concentration of three plant growth regulators (PRGs) on serum enzymes in rats were investigated under laboratory conditions. 100-ppm of PRGs, indoleacetic acid (IAA), indolebutiric acid (IBA) and kinetin were administered orally to 8 rats ad libitum for 3 weeks. The hormon treatments caused different effects on the level of serum alanin aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), amylase and creatine phosphokinase (CPK) in comparison to those of control rats. According to the results, while the levels of LDH and CPK were increased significantly by IBA, the levels of AST, LDH and CPK were …

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The Chronic Effects Of Teucrium Polium On Some Blood Parameters And Histopathology Of Liver And Kidney In The Rat, Khaled Khleifat, Jumah Shakhanbeh, Khaled A. Tarawneh Jan 2002

The Chronic Effects Of Teucrium Polium On Some Blood Parameters And Histopathology Of Liver And Kidney In The Rat, Khaled Khleifat, Jumah Shakhanbeh, Khaled A. Tarawneh

Turkish Journal of Biology

The effects of chronic treatment with small sublethal doses (20 mg/kg and 50 mg/kg) of Teucrium polium ethanolic extract were investigated on the hematological and biochemical composition of the blood, histopathology of the liver and kidney, and fertility in the rat. Hematological and biochemical parameters of the blood, as well as sperm count, morphology and motility were normal after 6 weeks of herbal treatment. However, blood urea (P < 0.05) and cholesterol (P < 0.005) were significantly increased, with marked cytoplasmic vacuolation of the liver and kidney cells after chronic treatment with 50 mg/kg of the plant. These results demonstrate some histopathological effects of T. polium on the liver and kidney under long-term administration conditions.

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A New Molecular Technique For The Identification Of Micro-Organisms In Biological Treatment Plants: Fluorescent In Situ Hybridization, Gülnur Coşkuner Jan 2002

A New Molecular Technique For The Identification Of Micro-Organisms In Biological Treatment Plants: Fluorescent In Situ Hybridization, Gülnur Coşkuner

Turkish Journal of Biology

Wastewater treatment has gained increased importance worldwide due to increasing demand on fresh clean water supplies. Biological treatment achieved by the activities of micro-organisms, is one of the most widely used processes in the treatment of wastewater. High numbers and activities of some groups of micro-organisms are required to treat wastewater in biological processes. In contrast, some groups of micro-organisms must be absent from the system since their presence and activities cause problems in the treatment of wastewater. The structure and function of micro-organisms in wastewater treatment plants (WWTP) have been investigated for decades. However, the identification of both the …

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Effects Of Photoperiod And Temperature On Growth And Reproductive Organ Mass In Adult Male Mongolian Gerbils, Meriones Unguiculatus, Bülent Gündüz Jan 2002

Effects Of Photoperiod And Temperature On Growth And Reproductive Organ Mass In Adult Male Mongolian Gerbils, Meriones Unguiculatus, Bülent Gündüz

Turkish Journal of Biology

Rates of growth and sexual maturation of Mongolian gerbils vary in response to photoperiod. Previous work has shown that the responses of the testes and body weight of juvenile and adult gerbils are influenced not only by the photoperiods but also by other factors. The present work sought to determine if Mongolian gerbils alter body mass, body composition and/or reproductive organ mass in response to different photoperiods and temperatures. Male Mongolian gerbils were raised under long (14L) or short (10L) photoperiods from 26 days of age. Photoperiods did not affect body mass and body length. Temperature affected body mass only …

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Food Intake And Feed Conversion Ratios In Abant Trout (Salmo Trutta Abanticus T., 1954) And Rainbow Trout (Oncorhynchus Mykiss W., 1792) In Pond Culture, İrfan Uysal, Ati̇lla Alpbaz Jan 2002

Food Intake And Feed Conversion Ratios In Abant Trout (Salmo Trutta Abanticus T., 1954) And Rainbow Trout (Oncorhynchus Mykiss W., 1792) In Pond Culture, İrfan Uysal, Ati̇lla Alpbaz

Turkish Journal of Biology

This study was carried out at DSI-Gölköy Fish Production Station in Bolu and lasted for 350 days. Food consumption (FC) and feed conversion ratios (FCR) in Abant and rainbow trout in pond culture were compared. Abant trout larvae obtained from eggs of wild Abant trout broodstocks in Lake Abant and rainbow trout larvae obtained from eggs of the cultured broodstocks in Gölköy Fish Production Station were used in this study. Trial I involved 4 groups (2 Abant and rainbow trout experimental groups and 2 Abant and rainbow trout parallel groups). Two hundred and thirty-six larvae were in each group; a …

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Increasing The Injured Area On Hypocotyl Explants Of Flax (Linum Usitatissimum L.) Leads To High Frequency Callus-Based Shoot Regeneration, Mustafa Yildiz, Celal Er Jan 2002

Increasing The Injured Area On Hypocotyl Explants Of Flax (Linum Usitatissimum L.) Leads To High Frequency Callus-Based Shoot Regeneration, Mustafa Yildiz, Celal Er

Turkish Journal of Biology

In this study, it was aimed to increase the frequency of shoots, which would be nominated to be transgenic after Agrobacterium inoculation, through expanding the wounding area by peeling the epidermis layer of hypocotyl explants of flax plants. Callus weight, percentage of hypocotyls producing shoots, shoot number per explant and total shoot number per petri dish were recorded as 0.8 g, 40%, 4.24 and 16.96, respectively in non-peeled explants. On the other hand, when the epidermis layer was peeled, callus weight, percentage of hypocotyls producing shoots, shoot number per explant and total shoot number per petri dish increased to 1.35 …

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Effect Of Some Biocides On Glutathione-S-Transferase In Barley, Wheat, Lentil And Chickpea Plants, Gülseren Coşkun, Fi̇gen Zi̇hni̇oğlu Jan 2002

Effect Of Some Biocides On Glutathione-S-Transferase In Barley, Wheat, Lentil And Chickpea Plants, Gülseren Coşkun, Fi̇gen Zi̇hni̇oğlu

Turkish Journal of Biology

The conjugation of glutathione with herbicides and insecticides is considered to be one of the major detoxification mechanisms of plants. This conjugation is catalysed by a family of multifunctional proteins known as glutathione-s-transferases. Treatment of wheat (Triticum aestivum L. cv. Cumhuriyet-75), barley (Hordeum vulgare L. cv. Kaya), chickpea (Cicer arietinum L. cv. Ispanyol), and lentil (Lens culinaris Medik. cv. Kışlık-kırmızı-51) with the selective herbicides 2,4-D (2,4-Dichloro phenoxyacetic acid) and linuron (N-(3,4-dichlorophenyl)-N´-methoxy-N´-methyl urea), and insecticides parathion methyl (O,O-dimethyl O-(4-nitrophenyl) phosphorothioate) and malathion (S-1,2-bis(ethoxycarbonyl)ethyl O,O-dimethyl phosphorodithioate) caused a progressive increase in glutathione-s-transferase activity in roots and shoots. The maximum increase in enzyme …

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The Effects Of Heavy Metals On Pollen Germination And Pollen Tube Length In The Tobacco Plant, A. Levent Tuna, Betül Bürün, İbrahi̇m Yokaş, Esi̇n Çoban Jan 2002

The Effects Of Heavy Metals On Pollen Germination And Pollen Tube Length In The Tobacco Plant, A. Levent Tuna, Betül Bürün, İbrahi̇m Yokaş, Esi̇n Çoban

Turkish Journal of Biology

This study was carried out to determine the effects of heavy metals (Ni, Fe, Pb, Co, Cd, Hg, Al, Zn and Cu) on pollen germination and pollen tube length in the tobacco plant (Nicotiana tabacum L.) cv. Karabağlar. The results showed that enhanced concentrations of heavy metals, except Fe, decreased the pollen germination rates and the pollen tube lengths. With Fe concentrations, on the other hand, first a positive, and then a negative relation was determined between the pollen characteristics examined. The most toxic effect on pollen germination was seen with the applications of Cu, Ni and Hg; on pollen …

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Use Of Ram Horn Hydrolysate As Peptone For Bacterial Growth, Esabi̇ Başaran Kurbanoğlu, Ömer Faruk Algur Jan 2002

Use Of Ram Horn Hydrolysate As Peptone For Bacterial Growth, Esabi̇ Başaran Kurbanoğlu, Ömer Faruk Algur

Turkish Journal of Biology

Peptone from ram horn was compared with a casein and other peptones for bacterial growth. First, horns were ground and 35 g of horn flour was hydrolyzed chemically (acid hydrolysis). As a result of this process, 30 g of the 35 g horn flour (85.7%) could be hydrolyzed. Hydrolyzed material was completed to 400 ml with deionized water, and this resulting solution was termed ram horn hydrolysate (RHH). The contents of protein, nitrogen, ash, some minerals, total sugars, total lipids and amino acids of RHH were determined. It was found that it has both organic and inorganic materials sufficient for …

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Assessment Of Two Highly Polymorphic Barley Microsatellite Markers For Detecting Polymorphism In Wheat, Emel Banu Büyükünal Bal, Mahi̇nur S. Akkaya Jan 2002

Assessment Of Two Highly Polymorphic Barley Microsatellite Markers For Detecting Polymorphism In Wheat, Emel Banu Büyükünal Bal, Mahi̇nur S. Akkaya

Turkish Journal of Biology

Simple sequence repeat (SSR) DNA polymorphism is a PCR-based marker system, also known as the microsatellite marker system. SSRs are tandemly repeated 1 to 5 nucleotide units dispersed throughout eukaryotic genomes. They are considered one of the most powerful molecular markers for many diverse applications in genome related studies, e.g., DNA fingerprinting for discrimination of genotypes and genetic mapping. Locus specificity, co-dominant inheritance and easy detection with PCR amplifications are some of the favorable features of this marker system. On the other hand, isolation of SSR markers depends on time-and labor-consuming processes. The need to obtain sequence information for locus …

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Typing Of Some Clinically Significant Nocardia Strains Using A Digoxigenin-Labelled Rdna Gene Probe, Kami̇l Işik, Nevzat Şahi̇n, Ergi̇n Kari̇ptaş, Michael Goofellow Jan 2002

Typing Of Some Clinically Significant Nocardia Strains Using A Digoxigenin-Labelled Rdna Gene Probe, Kami̇l Işik, Nevzat Şahi̇n, Ergi̇n Kari̇ptaş, Michael Goofellow

Turkish Journal of Biology

In this study, ribotyping (restriction polymorphism ribosomal RNA analyses) was applied as a taxonomic tool for bacteria belonging to the genus Nocardia. A total of 21 Nocardia strains were clearly distinguished using a combination of EcoRV gene restriction endonuclease patterns together with a digoxigenin-labelled Streptomyces violaceoruber TK21 rDNA probe. Five distinct ribotypes were identified, and each ribotype contained 4 to 8 restriction fragments ranging in size from 1.2 to 20.7 kb. The evaluation of the results showed that N. brasiliensis, N. farcinica, N. otitidiscaviarum and N. seriolea are taxonomically well-established species, except N. pseudobrasiliensis. Therefore, it can be concluded that …

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Effects Of Dietary Carbohydrate Level On Gastric Evacuation And Return Of Appetite In The Rainbow Trout, Oncorhynchus Mykiss, Ahmet Adem Teki̇nay, Simon John Davies Jan 2002

Effects Of Dietary Carbohydrate Level On Gastric Evacuation And Return Of Appetite In The Rainbow Trout, Oncorhynchus Mykiss, Ahmet Adem Teki̇nay, Simon John Davies

Turkish Journal of Biology

Three experimental diets containing 14.9% (low carbohydrate; LC), 31.4% (medium carbohydrate; MC) and 42.3% (high carbohydrate; HC) of extruded wheat meal were fed to rainbow trout, Oncorhynchus mykiss, to investigate the significance of carbohydrate level on the rates of gastric evacuation and return of appetite (feed intake). Gastric evacuation measurements were performed by serial slaughter and recovery of digesta whilst X-radiography was used to estimate the rates of return of appetite. Gastric evacuation data of all three treatments were best explained by square root equations. The gastric evacuation rate of the LC group was significantly different (P0.05) between the emptying …

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The Effect Of Different Explant Sources On Adventitious Shoot Regeneration In Flax (Linum Usitatissimum L.), Mustafa Yildiz, Sebahatti̇n Özcan, Celal Er Jan 2002

The Effect Of Different Explant Sources On Adventitious Shoot Regeneration In Flax (Linum Usitatissimum L.), Mustafa Yildiz, Sebahatti̇n Özcan, Celal Er

Turkish Journal of Biology

Hypocotyl and stem explants excised from in vitro and greenhouse-grown seedlings of Madaras, 1886 Sel. and Omega flax cultivars were compared in terms of percentage of explants producing shoots, shoot number per explant and total shoot number per petri dish. Hypocotyl explants resulted in better shoot regeneration. In vitro-grown seedlings were found to be more suitable than greenhouse-grown seedlings as an explant source.

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Determination Of Some Properties Of Bacillus Isolated From Soil, Belma Aslim, Necdet Sağlam, Yavuz Beyatli Jan 2002

Determination Of Some Properties Of Bacillus Isolated From Soil, Belma Aslim, Necdet Sağlam, Yavuz Beyatli

Turkish Journal of Biology

Forty strains were isolated from six different soil samples. The soil samples were taken from the grasslands of Elmadağ, Çubuk, Gölbaşı, Haymana, Polatlı and Kazan near Ankara. As a result of the identification tests, 30 strains were identified as Bacillus subtilis, Bacillus megaterium, Bacillus firmus, Bacillus sphaericus, Bacillus thuringiensis, Bacillus pumilus and other Bacillus spp. The inhibitory effect of Bacillus strains against the test bacteria Escherichia coli, Staphylococcus aureus, Yersinia enterocolitica and Micrococcus flavus was examined. It was found that B. thuringiensis D1, B. thuringiensis D3 and B. megaterium Y6 strains showed an inhibitory effect on all of the test …

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A Study Of The Unionidae Of Tinkers Creek, Ohio, Robert A. Krebs, Heather M. Griffith, Michael J. S. Tevesz Jan 2002

A Study Of The Unionidae Of Tinkers Creek, Ohio, Robert A. Krebs, Heather M. Griffith, Michael J. S. Tevesz

Biological, Geological, and Environmental Faculty Publications

We present data on freshwater mussel (Mollusca: Bivalvia: Unionidae) distributions for Tinkers Creek, a small Ohio stream that previously had not been surveyed for its unionid fauna. The distribution of these mussels was mapped against the changing habitat of the stream, with special attention paid to two zones of human manipulation, a wastewater treatment plant and a stretch of the river where the bed was relocated to enable development. At least five unionid species live in Tinkers Creek. These are Pyganodon grandis, Lampsilis radiata luteola, Fusconaiajlava, Lasmigona costata, and Lasmigona compressa. Fresh shells suggested the presence of three others: Strophitus …

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Changes In The Freshwater Mussel (Bivalvia: Unionidae) Fauna Of The Cuyahoga River, Ohio, Since Late Prehistory, Michael J.S. Tevesz, Louie Rundo, Robert A. Krebs, Brian G. Redmond, Ann S. Dufresne Jan 2002

Changes In The Freshwater Mussel (Bivalvia: Unionidae) Fauna Of The Cuyahoga River, Ohio, Since Late Prehistory, Michael J.S. Tevesz, Louie Rundo, Robert A. Krebs, Brian G. Redmond, Ann S. Dufresne

Biological, Geological, and Environmental Faculty Publications

We provide new information from archaeological samples on the historical freshwater mussel fauna (Mollusca: Bivalvia: Unionoidea) of the Cuyahoga River (South Park site: occupied between ca. A.D. 950 and 1650) and Black River (White Fort site, occupation centered at ca. A.D. 1350), northeast Ohio. Data from these prehi storic sites are compared with information on extant mussel populations of the Cuyahoga River published between 1890 and 2000. The high representation at both archaeological sites of the species Actinonaias ligamentina, Elliptio dilatata, and Ptychobranchus fasciolaris suggests that these were· among the important clean water species in northeast Ohio prior to European …

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A New Megalonychid Sloth From The Late Wisconsinan Of The Dominican Republic, Elizabeth Rega, Donald A. Mcfarlane, Joyce Lundberg, Keith Christenson Jan 2002

A New Megalonychid Sloth From The Late Wisconsinan Of The Dominican Republic, Elizabeth Rega, Donald A. Mcfarlane, Joyce Lundberg, Keith Christenson

WM Keck Science Faculty Papers

An unusually well preserved skull, mandible, and indisputably associated post-cranial elements of new sloth, Acratocnus (Miocnus), were recovered from a cave in Jaragua National Park, Dominican Republic. The animal died lying in a rimstone pool and was rapidly coated with a thin calcite patina. We have documented a late Wisconsinan age for this specimen by inorganic 14C radiometric dating of the patina, with supporting data on the carbon systematics of the speleothems in this cave. This sloth is described as a new species on the basis of the distinctive morphology and relative size of cranial and mandibular features. We consider …

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A Middle Pleistocene Age And Biogeography For The Extinct Rodent Megalomys Curazensis From Curaçao, Netherlands Antilles, Donald A. Mcfarlane, Joyce Lundberg Jan 2002

A Middle Pleistocene Age And Biogeography For The Extinct Rodent Megalomys Curazensis From Curaçao, Netherlands Antilles, Donald A. Mcfarlane, Joyce Lundberg

WM Keck Science Faculty Papers

The extinct oryzomyine rodent Megalomys curazensis has been known from abundant but fragmentary remains on the island of Curaçao since 1959. Here we demonstrate an age of 130 000 to 400 000 years before present based on geomorphological context, and propose a biogeographical model for the genus.

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A Late Quaternary Paleoecological Record From Caves Of Southern Jamaica, West Indies, Donald A. Mcfarlane, Joyce Lundberg, A.G. Fincham Jan 2002

A Late Quaternary Paleoecological Record From Caves Of Southern Jamaica, West Indies, Donald A. Mcfarlane, Joyce Lundberg, A.G. Fincham

WM Keck Science Faculty Papers

Studies of an unusual and diverse system of caves in coastal southern Jamaica have yielded a paleoclimatic record associated with a fossil vertebrate record that provides useful insights into the poorly documented paleoecology of latest Wisconsinan and Holocene Jamaica. Episodes of significantly increased precipitation during the Holocene have left characteristic deposits of speleothems, and have supported both faunal and archaeological communities that were dependent on these mesic conditions. Deposits of fossil bat guano preserved in the caves provide a δ¹³C record of alternating mesic and xeric climatic episodes that supports the interpretation of the faunal and archaeological record.

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Scarification Technique Affects Germination Of Stylisma Pickeringii (Patterson Bindweed ), An Illinois Endangered Plant, Henry R. Owen, Brent L. Todd, Janice M. Coons Jan 2002

Scarification Technique Affects Germination Of Stylisma Pickeringii (Patterson Bindweed ), An Illinois Endangered Plant, Henry R. Owen, Brent L. Todd, Janice M. Coons

Faculty Research & Creative Activity

The seed coat of Stylistna pickeringii (Torr.) Gray var. pattersoni (Patterson bindweed), an endangered species of Illinois sand prairies, inhibits water uptake and seed germination. The purpose of this research was to find an effective and efficient way to scarify seeds of S. pickeringii to aid reintroduction into its natural habitat. Seeds were collected from sandy areas close to the Illinois River near Snicarte (Mason Co.), Illinois during the summers of 1998 and 1999. Experiments were conducted to determine the best scarification techniques (basal cut, sandpaper shakes, sulfuric acid, sand shakes and sonication). Initially, each technique was evaluated by scarifYing …

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Current Trends In Urinary Tract Infections: Is Cipro Really Necessary?, Kristin Stagg Jan 2002

Current Trends In Urinary Tract Infections: Is Cipro Really Necessary?, Kristin Stagg

Capstone Research Projects

Urinary tract infections are one of the most common causes of ambulatory care visits, physician-office visits and hospitalization each year in the US. Sexual activity primarily contributes to acquisition of UTI in women; nearly half of adult women have had a UTI at least once. The most common causative agent is E. coli, followed by Enterobacter spp., Klebsiella spp., Pseudomonas aeruginosa, Proteus mirabilis, other Gram-negative rods and Group B streptococci, depending on geographical location. 1 Until the late 1990's, trimethoprim-sulfamethoxazole (TMP-SMX) was the most commonly prescribed and effective treatment option, but the rampant development of resistance to this drug has …

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The Effectiveness Of A Far Lateral L5-S1 Microdiscectomy In Pain Reduction, Jamie Griffin, Scott D. Hodges, Jason Eck, S. Craig Humphreys Jan 2002

The Effectiveness Of A Far Lateral L5-S1 Microdiscectomy In Pain Reduction, Jamie Griffin, Scott D. Hodges, Jason Eck, S. Craig Humphreys

Capstone Research Projects

Diagnosis of far lateral disc herniations has become more common in recent years. This study describes the surgical procedure used for L5-S1 far lateral disc herniations, shows the benefits derived from a far lateral approach and retrospectively evaluates the outcome of the surgery. Eight patients were included in the study, five females and three males. The mean age was 62 years (range, 45-77 years). VAS pain scale, OSW index and SF-36 forms were used to evaluate the surgical outcome. Both the VAS pain scale and OSW index were improved postoperatively. The SF-36 scores were significantly lower (p<0.05) for the far lateral patients compared to both the low back pain population and the U.S. aged 55-64 year population.

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Treatment Of Hydrogen Cyanide And Hydrogen Chloride Inhalation In Mice With Hyperbaric Oxygen Therapy Versus Supplemental Oxygen, Renee Rader, Russell Rader, Daniel Wunderlich Jan 2002

Treatment Of Hydrogen Cyanide And Hydrogen Chloride Inhalation In Mice With Hyperbaric Oxygen Therapy Versus Supplemental Oxygen, Renee Rader, Russell Rader, Daniel Wunderlich

Capstone Research Projects

Hyperbaric oxygen therapy promotes faster tissue healing by increasing the amount of oxygen carried to the tissues. HBO is currently used to treat carbon monoxide poisoning as well as smoke inhalation. Based on this information, it was believed that HBO would also promote faster healing for hydrogen cyanide gas or hydrogen chloride gas inhalation, which are encountered in burning material. To test this theory, mice were exposed to HCN or HCl gas. The mice were then placed in hyperbaric oxygen or supplemental oxygen treatments for five days. Weight change and overall survival rate were used to establish what method of …

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Extractions Of Aspergillus Flavus Link Ex Gray And Cladosporium Cladosporioides (Fresen.) De Vries From Allergenic Microfungi And Application Of Toxicity Tests, Günay Çolakoğlu Jan 2002

Extractions Of Aspergillus Flavus Link Ex Gray And Cladosporium Cladosporioides (Fresen.) De Vries From Allergenic Microfungi And Application Of Toxicity Tests, Günay Çolakoğlu

Turkish Journal of Biology

Aspergillus flavus Link ex Gray and Cladosporium cladosporioides (Fresen.) de Vries, isolated from the soil of Florya Atatürk Forest, were extracted and some toxicity tests were carried out in order to determine their toxic effects on mice for the first time in Turkey. The method of extraction complied with the one described in the literature. During the process, Coca's solution was used as an extractive agent. Sterile filtration was employed in the sterilization process. The stocks were diluted to 1/10 of their concentrations before the toxicity tests were carried out. It was found that the A. flavus Link ex Gray …

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Problems With Developmental Stability In Two Rodent Species From Chornobyl, Taras K. Oleksyk, Michael H. Smith, Sergiy P. Gashchak, James M. Novak, James R. Purdue Jan 2002

Problems With Developmental Stability In Two Rodent Species From Chornobyl, Taras K. Oleksyk, Michael H. Smith, Sergiy P. Gashchak, James M. Novak, James R. Purdue

Faculty Research & Creative Activity

Changes in developmental patterns are some of the most important effects that may be observed at radioactively contaminated sites like those at Chornobyl. Developmental instability may arise from the interactions between an organism's genotype and its environment and be manifested as deviant morphology. Fluctuating asymmetry (FA) is a measure of deviations from the expected bilateral symmetry of the body. Our objective was to test for differences in FA in two rodent species (Apodemus flavicollis and Clethrionomys glareolus) that live in habitats suirounding the failed Chornobyl reactor. Rodents were collected from four different locations (two contaminated and two reference sites), and …

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Acoustic Competition In The Gulf Toadfish Opsanus Beta: Acoustic Tagging, Robert F. Thorson, Michael L. Fine Jan 2002

Acoustic Competition In The Gulf Toadfish Opsanus Beta: Acoustic Tagging, Robert F. Thorson, Michael L. Fine

Biology Publications

Nesting male gulf toadfish Opsanus beta produce a boatwhistle advertisement call used in male–male competition and to attract females and an agonistic grunt call. The grunt is a short-duration pulsatile call, and the boatwhistle is a complex call typically consisting of zero to three introductory grunts, a long tonal boop note, and zero to three shorter boops. The beginning of the boop note is also gruntlike. Anomalous boatwhistles contain a short-duration grunt embedded in the tonal portion of the boop or between an introductory grunt and the boop. Embedded grunts have sound-pressure levels and frequency spectra that correspond with those …

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Meiotic Cohesion Requires Accumulation Of Ord On Chromosomes Before Condensation., Eric M. Balicky, Matthew W. Endres, Cary Lai, Sharon E. Bickel Jan 2002

Meiotic Cohesion Requires Accumulation Of Ord On Chromosomes Before Condensation., Eric M. Balicky, Matthew W. Endres, Cary Lai, Sharon E. Bickel

Biology Faculty Publications

Cohesion between sister chromatids is a prerequisite for accurate chromosome segregation during mitosis and meiosis. To allow chromosome condensation during prophase, the connections that hold sister chromatids together must be maintained but still permit extensive chromatin compaction. In Drosophila, null mutations in the orientation disruptor (ord) gene lead to meiotic nondisjunction in males and females because cohesion is absent by the time that sister kinetochores make stable microtubule attachments. We provide evidence that ORD is concentrated within the extrachromosomal domains of the nuclei of Drosophila primary spermatocytes during early G2, but accumulates on the meiotic chromosomes by mid to late …

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