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Turkish Journal of Physics

No abstract provided.

Cover And Contents

Turkish Journal of Physics

No abstract provided.

Cover And Contents

Turkish Journal of Physics

No abstract provided.

Sialic Acid Conjugated Chitosan For The Attenuation Of Amyloid-Beta Toxicity, Dhruva Dilip Dhavale

LSU Master's Theses

Amyloid-beta (Aβ), a 39 to 43 amino acid long peptide, is the primary species identified in senile plaques associated with Alzheimer’s disease (AD) and has been implicated in the neurotoxicity associated with AD. It is believed that Aβ toxicity is mediated through the interaction with neuronal membranes. A variety of evidence indicates that 1) Aβ may bind to the cell surface sialic acids, 2) the affinity of this interaction is higher if the gangliosides or sialic acids on the cell surface are clustered, 3) the removal of the surface sialic acids attenuate Aβ toxicity. Based on this data, we hypothesized …

Modeling Gag Grouper (Mycteroperca Microlepis) In The Gulf Of Mexico: Exploring The Impact Of Marine Reserves On The Population Dynamics Of A Protogynous Grouper, Robert D. Ellis

LSU Master's Theses

The gag grouper (Mycteroperca microlepis) population in the Gulf of Mexico supports both a commercial and recreational fishery but has experienced a decrease in the male to female sex ratio over the past thirty years. Protogynous fish populations naturally have a smaller male to female ratio than gonochoristic fish populations; however the decline in the gag population is such that sperm limitation may be occurring. In an effort to correct the decline in sex ratio, fishery managers have recently implemented two marine reserves designed specifically to protect gag spawning aggregations. Results from two population models (an age-structured model and an …

“Atmosphere And Climate”: A Curricular Guide For High School Environmental Science A Creative Component, Kari M. Schmidt

Graduate Research Papers

The unit examines different facets of atmosphere and climate as part of the Environmental Science curriculum. In cooperative learning groups, the students work on group and independent hands-on activities with math connections. A culminating assessment project conducted in cooperative learning groups utilizes student technology skills. Information for this unit was taken from various books and classes that I have studied throughout this Master's program. My intent when creating this unit was to help students understand the importance of asking the correct questions and thinking for themselves to solve problems.

Problem-Based Learning In The Middle School Science Classroom, Lesley Taylorson

Graduate Research Papers

In 1995, US 12th graders performed below the international average for 21 countries on a test of general knowledge in mathematics and science. (National Center for Education Statistics (NCES), 1998). In 2000, 93% of students in grades '5-9 were taught physical science by a teacher lacking a major or certification in the physical sciences (National Center for Education Statistics, 2002). U.S. 15-year-olds ranked 24th out of 40 countries that participated in a 2003 administration of the Program for International Student assessment (PISA) examination, which assessed students' ability to apply mathematical concepts to real world problems (National Center for Education Statistics, …

Spelling Instruction In The Classroom, Kristin Zweibohmer

Graduate Research Papers

The purpose of this paper is to identify research-based, effective spelling strategies that will improve students' abilities in a classroom. There has been a great debate about the effectiveness of spelling instruction in the classroom. Many studies have been conducted on spelling instruction using a word sort technique. By looking at past and present studies of spelling instruction, educators will be able to see how well these strategies for spelling instruction have worked. This knowledge can help educators design a spelling instruction program that will enhance their students' scores in many curriculum areas. An effective, research-based, contemporary model for teachers …

Showing Utah 4-H Dressage, Rebecca Lewis, Patricia Evans

All Current Publications

This publication gives information on Dressage which teaches understanding between horse and rider. Dressage develops the horse's physical and mental condition.

Donor Intent: An Examination Of The Pertinent Literature Between Donors And Charities And The Legalities Of Complying With The Donor’S Restrictions On Gifts, Sherry Kluender

Graduate Research Papers

Foundations and non profit organizations have a moral, ethical and legal responsibility to honor the donor's original intent with their gift. Unfortunately, there are several instances in the past few years that have shown charities in the public eye where they have intentionally broke the agreements with their donors, thus causing donor mistrust and creating legal battles that affect all organizations. This paper outlines what donor intent entails, the legal boundaries which organizations need to abide and their legal rights to break donor intent. Lastly, this literature review will cover ethical behavior and how to combat this growing trend. Ultimately, …

The Effects Of Exercise-Induced Amenorrhea On The Fertility Of Female Athletes, Kara Johnson

Graduate Research Papers

It is well documented that a high number of female athletes experience detrimental health effects as a result of the "female athlete triad"-a set of conditions including osteoporosis, disordered eating, and amenorrhea. While the health effects of disordered eating and osteoporosis are heavily studied and well-known, even to the general population, the long-term consequences of amenorrhea are relatively unknown.

There is much evidence and documentation that women who engage in exercise and sport are likely to experience amenorrhea. Research has also shown that exerciseinduced amenorrhea can lead to a host of reproductive problems, including luteal phase defects, hormonal disruptions, and …

Are Soda Beverages A Contributing Factor To Weight Gain In Children?, Wendy Maria Clark

Graduate Research Papers

The controversy that diet soda may trigger a mechanism for weight gain has inspired this literature review. Our children need current facts on what is healthy and not healthy. Soda has been regarded as a discretionary beverage and not long ago, as a treat, after daily nutritional needs were met. However, soda is being consumed more frequently replacing other healthy nutritious beverages. Since diet soda is calorie-free, people unknowingly may imagine it has no impact on their bodies. In reality, research findings suggest that the effects of soda on the body are not benign. It is worth taking an in-depth …

Differentiated Instruction In The Secondary Social Studies Classroom, Chad A. Christopher

Graduate Research Papers

As an educator with fifteen years of experience, this author has experienced the frustrations of having to teach a wide range of student abilities at the secondary social studies level. There is a lot of support for differentiated instruction for special education, TAG, and elementary students, but there seems to be questions about the practicality and effectiveness of it in a secondary classroom.

The issues discussed in this paper will focus on the following questions: 1) Does Differentiated Instruction affect student learning? 2) Can Differentiated Instruction be implemented with secondary teachers in a practical way to help student learning and …

Graphic Practice : A Strategy For Developing Fine Motor Skills In The Early Childhood Setting, Kathleen A. Eichelberger

Graduate Research Papers

Graphic practice provides children with an opportunity to develop, not only fine motor skills, but also self-regulatory and alphabet knowledge skills. Research has indicated that a child's fine motor development can predict his or her educational achievement, specifically in the areas of reading, math, and attention. The purpose of this project is to organize thirty weekly lessons that will familiarize teachers with the components necessary to introduce, integrate, and extend graphic practice strategies within their early childhood classrooms. These lessons will be compiled into a step-by-step guide for teachers. An outline for professional development is included.

A Portrayal Of The Modern Day Dairy Farm In Children's Literature, Bridget Donlon

Graduate Research Papers

Children's books may be the only views of farming urban students experience, yet books depicting farms with one or two cows are outdated. There is a lack of information available for children to learn about modem dairy farming practices. The dairy industry has experienced substantial changes in its history, including the introduction of many technologies. Modem dairy farms have incorporated technologies into everyday tasks, yet few children's books show farmers working at computers or even milking machines. At a time when most families are removed from farming, students create understanding of dairy farming through secondary sources such as children's literature. …

A Content Analysis Of Holocaust Fiction For Young People, Teresa Ann Evans-Winfield

Graduate Research Papers

The purpose of this research was to examine Holocaust literature for young adults to determine if the books in this sample are historically accurate, have themes of survival and resistance, and portray characters who model positive attributes of citizenship. This researcher read 24 books copyrighted between 1992-2008 that were selected from H. W. Wilson's Junior High and Middle School Core Collection and Senior High School Core Collection. Nineteen of the twenty-four books read by this researcher were copyrighted after the year 2000. The data gathered provided evidence that 15 (63%) of the books sampled were historically accurate and were fictionalized …

Moderating Effects Of Knowledge, Gender, And Education On The Relationship Between Environmental Value Orientation And Support For Louisiana Coastal Restoration, Meya Voorhies Holloway

LSU Master's Theses

Coastal Louisiana marshes are eroding at a rate equivalent to one football field every thirty minutes. It is vital to understand the perceptions of the American public regarding this issue. I conducted a self-administered mail survey during the spring of 2006. The survey was sent to 4,500 residents living in the Mississippi River Valley. The survey was used to identify respondents environmental value orientations, assess respondents attitudes with regards to support for restoration funding for Louisiana’s coastal wetlands, and to determine if outside moderating effects occurred to make respondents with specific value orientations (Anthropocentric or Biocentric) more likely to support …

Timecourse Analysis Of The Effect Of Atrazine On Human Hepg2 Cells, Erin M. Schrunk

Honors Program Theses

Atrazine is one of the most abundantly used herbicides in the United States. It works by inhibiting photosynthesis in broad leaf and grassy weeds. Consequently, with its frequent use, atrazine can contaminate many drinking water sources due to run-off from treated fields. While many studies have shown detrimental effects occur in various model organisms using very high levels of atrazine, not much is known about what effects occur due to lower levels of atrazine exposure. The current research project analyzed the effects of atrazine on human liver cells (HepG2). Specifically, we focused on the proteins that regulate cell cycle progression …

Tnf-Alpha Inhibition Of Adiponectin Expression By Targeting Ppar-Gamma And C/Ebp In Adipocytes, Yanning Wang

LSU Master's Theses

Chronic inflammation is involved in the adipose tissue dysfunction through regulation of endocrine and storage function of adipocytes. As a representative proinflammatory cytokine, TNF-α was reported to inhibit expression of adiponectin. However, the mechanism of inhibition remains to be identified. Here, we provide experimental evidence that TNF-α inhibits adiponectin at both transcriptional and posttranscriptional levels. In three animal models (aP2-P65, ob/ob and high fat diets-fed mice), an increase in TNF-α expression was associated with a decrease in adiponectin expression. In 3T3-L1 adipocytes, TNF-α inhibition of adiponectin was observed at mRNA and protein levels. Luciferase reporter assay and mRNA stability tests …

Translocation Success Of Adult Red-Cockaded Woodpeckers, Erin Herbez

LSU Master's Theses

The red-cockaded woodpecker (Picoides borealis; hereafter RCW) is a cooperative breeder endemic to open old-growth pine savannah ecosystems in the southeastern United States (Jackson 1994). The RCW was listed as federally endangered in 1973, after a population decline due to habitat loss. Habitat fragmentation produces isolated populations of RCWs, which in turn ultimately limits the success of the species. RCW biologists and managers counteract effects of fragmentation by aggregating recruitment clusters and translocation. Although several studies examined subadult RCW translocation, detailed studies examining adult translocation have been limited. My study was conducted on a 3500 ha area owned by Plum …

Characterization Of Endoreplicated Nuclei In Arabidopsis Thaliana, Rasheed A. Ahmad

LSU Master's Theses

A model plant, Arabidopsis thaliana, duplicates its chromosomes without cell division, in a process known as endoreplication. The primary objective of this study was to identify genes and proteins that specifically accumulate in endoreplicated nuclei in Arabidopsis thaliana. Analysis of nuclei sorted by fluorescent activated cell sorter (FACS) revealed that ploidy levels and nuclear volume were positively correlated. However, the protein amounts among 2C, 4C, and 8C nuclei had no significant differences. This indicated a decrease of the protein concentration in endoreplicated nuclei. In contrast, the RNA amount in the 8C nuclei was 1.3- and 1.4-fold higher than that in …

Synthesis And Antimicrobial Activity Of Dinaphtho[2,1-B]Furan-2-Yl-Methanone And Their Oxime Derivatives, Cumhur Kirilmiş, Murat Koca, Süleyman Servi̇, Seher Gür

Turkish Journal of Chemistry

The reaction of 2-hydroxy-1-naphthaldehyde with 1,3-dichloroacetone and potassium carbonate was used to prepare dinaphtho[2,1-b]furan-2-yl-methanone (1) as starting reagents. In order to obtain dinaphtho[2,1-b]furan-2-yl-methanole (2), compound 1 was reduced with NaBH_4. N-oxime derivative of this compound (3) was synthesized by the reaction of the compound 1 with hydroxylamine. Alkyl and acyl substituted N-oxime ethers (4-11) were obtained by the reaction compound 3 with various halogen containing compounds. Compound 12 was obtained by reflux of the compound 11 with hydrazine monohydrate in ethanol. Compound 13 was synthesized by the reaction of the compound 11 with NaOH. The synthesized compounds were tested for …

The Effects Of Oral Administration Of An Aqueous Extract Of Ficus Bengalensis Stem Bark On Some Hematological And Biochemical Parameters In Rats With Streptozotocin-Induced Diabetes, Mahalingam Gayathri, Krishnan Kannabiran

Turkish Journal of Biology

The effects of sub-chronic administration of an aqueous extract of Ficus bengalensis stem bark on hematological and biochemical parameters in rats with streptozotocin (STZ)-induced diabetes were evaluated. The possible protective effect of the F. bengalensis (500 mg/kg of body weight per day) extract on STZ-induced changes was evaluated over 12 weeks. The parameters evaluated were plasma proteins, including total protein albumin and globulin, non-protein nitrogenous substances, including urea, uric acid, and creatinine, and hematological indices, including total hemoglobin content, erythrocytes, leucocytes, and platelets counts. The aqueous extract had a significant (P < 0.05) protective effect against STZ-induced changes in terms of the markers of protein metabolism and hematological indices. Furthermore, increases in levels of non-protein nitrogenous substances were normalized in response to the administration of the extract. Thus, the aqueous extract of F. bengalensis had a significant protective effect on STZ-induced changes to biochemical and hematological parameters in the diabetic rats.

Identification Of Lactococcus Lactis Subsp. Isolates Based On Their Cell Wall Protein Profiles And Plasmid Contents, Mehtap Üstün, Banu Özden, Ömer Şi̇mşek, Mustafa Akçeli̇k

Turkish Journal of Biology

In this study, among the total 50 lactococci isolates, 44% L. lactis subsp. lactis, 28% L. lactis subsp. lactis biovar. diacetylactis and 28% L. lactis subsp. cremoris strains were identified by their phenotypic characterization. According to the cell wall protein patterns, 8.6, 12.5, 14.7, 20.3, 23.4, 25.4, and 31.8 kDa proteins were found identical within 82% of isolates. Moreover 93% of L. lactis subsp. cremoris strains contained a unique 157.8 kDa protein; however, L. lactis subsp. lactis and L. lactis subsp. lactis biovar. diacetylactis had no unique protein in their groups. Also a key plasmid profile, which would be used …

Antisalmonella Activity Of Selected Medicinal Plants, Chand Pasha, Shaik Sayeed, Sadath Ali, Ziaullah Khan

Turkish Journal of Biology

Antisalmonella activity of some important plants in the Ayurvedic system of traditional medicine used in India to treat enteric diseases was screened. The aqueous and methanol extracts of 47 medicinal plants were studied for their antibacterial activity against pathogenic Salmonella typhi, Salmonella paratyphi A, and Salmonella typhimurium. The in vitro antibacterial activity was performed by agar well diffusion method and the results are expressed as the average diameter of zone of inhibition of bacterial growth around the well. Of the herbal extracts tested, 33 plant extracts were found to have antibacterial activity against at least one of the salmonella strains …

Antibacterial Activity Of Seed Extracts Of Commercial And Wild Lathyrus Species, Noor Afshan Khan, Sadaf Quereshi, Akhilesh Pandey, Ashutosh Srivastava

Turkish Journal of Biology

Butanolic extract of seeds from 2 different Lathyrus species (Lathyrus ratan [commercial variety] and L. aphaca [wild variety]), were investigated for their in vitro antibacterial activity. The antibacterial activity against plant and human pathogenic bacteria was evaluated on the basis of inhibition zones (IZs) measured by disc diffusion method. The maximum inhibition was shown by L. ratan against the gram-positive bacterium Staphylococcus aureus. L. aphaca seeds also showed inhibition but were inactive against Klebsiella pneumoniae. L. ratan extract was more active than L. aphaca. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values for both the seeds (in …

The Toxicity And Teratogenicity Of Gibberellic Acid (Ga3) Based On The Frog Embryo Teratogenesis Assay-Xenopus (Fetax), Ayper Boğa, Seçi̇l Bi̇nokay, Yaşar Sertdemi̇r

Turkish Journal of Biology

This study investigated the developmental toxicity of a plant growth regulator (a type of pesticide) using the frog embryo teratogenesis assay-Xenopus (FETAX). Xenopus laevis embryos were exposed to 11 different concentrations of gibberellic acid (GA_3), from stage 8 to 11, for 96 h under static renewal test conditions. The median lethal concentration (LC_{50}), malformation (EC_{50}), non-observed adverse effect concentration (NOAEC), and lowest observed adverse effect concentration (LOAEC) were calculated. The corresponding LC_{50} and EC_{50} values determined for GA3 exposure were 1117.5 mg/L and 658 mg/L, respectively. The TI (LC50/EC50) value calculated for GA_3 was 1.69. Different anomalies occurred in the …

The Effect Of Interaction Of Rauwolfia Vomitoria Root Bark Extract With Vitamin E On Rats’ Liver Enzymes, Monday I. Akpanabiatu, Friday E. Uboh, Theresa B. Ekanem, Imeh Ben Umoh, Eyong Ubana Eyong, Sylvanus O. Ukafia

Turkish Journal of Biology

In our previous paper we demonstrated the influence of Rauwolfia vomitoria root bark extract on cardiac enzymes of normal Wistar rats and the effectiveness of this root bark as a source of antihypertensive agent, as determined by the marker enzymes, would be a useful index for the toxicity of this plant in clinical application. In this paper we present the results of the effect of Rauwolfia vomitoria root bark extract and its interaction with vitamin E on the liver function enzymes, such as alkaline phosphatase (ALP), alanine amino transferase (ALT), aspartate amino transferase (AST), gamma glutamyl transferase (\gamma-GT), and the …

Cover And Contents

Turkish Journal of Biology

No abstract provided.

Genotoxic Effects Of Herbicide Illoxan (Diclofop-Methyl) On Allium Cepa L., Deni̇z Yüzbaşioğlu, Fatma Ünal, Cengi̇z Sancak

Turkish Journal of Biology

The genotoxic potential of the commercial herbicide Illoxan (containing 284 g/L diclofop-methyl) was determined by using chromosome aberrations in Allium cepa root tip cells. The EC_{50} value was determined as 150.00 mg/L using a root growth inhibition test and then the roots were treated with 37.50, 75.00, and 150.00 mg/L concentrations for 12, 24, and 48 h. The results indicated that Illoxan significantly increased the abnormal cell frequency at all concentrations and treatment periods when compared with their controls, and this increase was dose-dependent for the 24 and 48 h treatments. On the other hand, Illoxan significantly decreased the mitotic …