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Comparison Of The Three Major Administrative Approaches To The Management Of Concurrent Enrollment Programs At Utah State University From 1987 To 1991, Haile Hirpa May 1993

Comparison Of The Three Major Administrative Approaches To The Management Of Concurrent Enrollment Programs At Utah State University From 1987 To 1991, Haile Hirpa

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to investigate the relationship of the Utah State University concurrent enrollment program to the achievement (GPA), recruitment, and retention of program participants after joining Utah State University.

Three administrative approaches to the management of concurrent enrollment programs were identified for the purpose of this study: Level One, Level Two, and Level Three. Level One involved high school teachers who taught and graded the concurrent enrollment program courses. In Level Two, high school teachers taught the courses, but University professors prepared exams and graded the papers. In Level Three, teaching, exam preparation, and paper grading …


Marital Satisfaction Over The Family Life Cycle Among Taiwanese Couples, Sheng-Te Chang May 1993

Marital Satisfaction Over The Family Life Cycle Among Taiwanese Couples, Sheng-Te Chang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to determine whether or not there were different subjective reports of marital satisfaction or dissatisfaction across the life cycle for Taiwanese couples. In examining this question two of the three selected instruments demonstrated sufficient reliability so as to be included in the overall study, namely, the Marital Adjustment Scale (MAS) and the Spanier Dyadic Adjust Scale (SDAS). These instruments were translated from English to Chinese, then administered to 259 couples volunteering to participate in the study. Couples were grouped according to their placement along the life cycle.

The results of the study indicate that …


Gregarious Behavior In Large Mammals: Modeling, Methodology, And Application, Thomas L. Morton May 1993

Gregarious Behavior In Large Mammals: Modeling, Methodology, And Application, Thomas L. Morton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Gregarious behavior of ungulates was considered in four ways. The first concern was W. D. Hamilton's hypothesis that a simple movement rule could reduce predation risk and encourage grouping behavior. Simulations showed little effect of this nearest-neighbor rule on predation risk. Similar, more complicated rules reduced predation risk by up to two thirds.

The second focus was on the accuracy of ground observers in diagramming individual animal locations in small herds of elk. A remotely controlled airplane was used to photograph the herds from above. A substantial distance discrepancy was found between "true" and "observed" animal locations. This discrepancy increased …


Validation Of The Rapid Speech Transmission Index (Rasti) In A Classroom Environment, Jeffery Larsen May 1993

Validation Of The Rapid Speech Transmission Index (Rasti) In A Classroom Environment, Jeffery Larsen

Undergraduate Honors Capstone Projects

Because the acoustics of a room have a substantial impact on speech intelligibility, researchers have tried over the years to develop the most effective way to evaluate the effects of the acoustic environment on speech intelligibility. Both subjective and objective measures of speech intelligibility have been devised. For the purposes of this study, subjective measures are those in which a speech recognition test is given to a group of subjects whose scores provide a direct indication of speech intelligibility at each position in the listening environment {Steeneken & Houtgast, 1980). Objective measures are those that determine the acoustic factors that …


The Relationship Between Grandparent Involvement And Identity Level In Late Adolescent Females, Catherine Dinicolangelo Stogner May 1993

The Relationship Between Grandparent Involvement And Identity Level In Late Adolescent Females, Catherine Dinicolangelo Stogner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Identity development is recognized as the key developmental task of late adolescence. The family is thought to serve as a facilitating factor in this development. Traditionally, reference to the family's role in adolescent identity development has alluded to the nuclear family and to parents in particular. However, a growing consensus that nuclear families are not emotionally and psychologically isolated from extended families has permitted greater acceptance of the extended family, especially grandparents, as an integral part of the family. The purpose of this study is to examine the relationship between grandparent involvement and adolescent identity development. Identity development was measured …


Preschool Children's Perceptions Of Their Parents: A Comparison Of Children From Married And Divorced Homes, Sondra Moe May 1993

Preschool Children's Perceptions Of Their Parents: A Comparison Of Children From Married And Divorced Homes, Sondra Moe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Young children's perceptions of their parents have been shown to affect responses to parents, and to be relevant in personality development and self-esteem. Typically, research examining children's perceptions of their parents focused on children from intact families. Yet, with the frequent occurrence of divorce in our society, and the trauma and lifestyle changes often associated with marital dissolution, it is possible that children's perceptions of their parents may also change.

This study compared two groups of preschool children's perceptions of their parents. Forty - two children (23 males, 19 females) came from two parent, first marriage families. Thirty-two children (16 …


Training Seminars For Regular Education Teachers: Preparing To Teach Students Who Are Deaf In The Hearing Classroom, K'Leis H. Young May 1993

Training Seminars For Regular Education Teachers: Preparing To Teach Students Who Are Deaf In The Hearing Classroom, K'Leis H. Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

"Increased numbers of children who bear the medical label 'deaf' or 'hard of hearing' are being integrated today into regular classes with their hearing peers in preschool, elementary and secondary schools of the United States" (Northcott, 1980, p. 1). Luckner (1992) related that approximately 79% of deaf and hard of hearing students have been served in mainstream settings. Regular education teachers were being asked to educate students who are deaf and hard of hearing with those who have no hearing difficulty.


Climatic Variability And Dynamics Of Great Salt Lake Hydrology, Taiye B. Sangoyomi May 1993

Climatic Variability And Dynamics Of Great Salt Lake Hydrology, Taiye B. Sangoyomi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The time evolution of the Great Salt Lake hydro-climatic system is studied from the perspective of nonlinear dynamics. The dynamics are reconstructed in phase space using the Great Salt Lake volume time series. Important attributes for describing the system are then obtained from the reconstructed space. These include the minimum number of state variables required to describe the system inferred from a determination of the intrinsic dimension, and characterization of the system in terms of linear/nonlinear, and deterministic/stochastic. Other attributes obtained are the dominant modes of behavior of the system, as well as the limit of predictability or information loss, …


Effects Of Water Stress Preconditioning On Plant Water Relations And Transplant Survival Of Artemisia Cana And Agropyron Intermedium, Jerriann Ernstsen May 1993

Effects Of Water Stress Preconditioning On Plant Water Relations And Transplant Survival Of Artemisia Cana And Agropyron Intermedium, Jerriann Ernstsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Typically, dormant seedlings are transplanted when revegetating nonirrigated disturbed lands in order to prevent transplant shock triggered by water stress. Since dormant seedlings have to be used, this limits the duration of the transplant season. It may be possible to increase this limited season by inducing acclimation responses that would increase drought tolerance. Preconditioning actively growing seedlings to water stress prior to transplanting could induce acclimation responses such as solute accumulation and/or stomatal modulation.

Under greenhouse conditions, A. cana and A. intermedium seedlings were subjected to three water stress preconditioning treatments: a well watered control, one dry-down cycle, and three …


Parenting Style And Child Behavior Problems: A Longitudinal Analysis, Margaret H. Young May 1993

Parenting Style And Child Behavior Problems: A Longitudinal Analysis, Margaret H. Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Data from the National Survey of Children were used to study the relationships between children's perceptions of parental support and control and measures of self-esteem and behavior problems over time. Data were collected in 1976, when the children were aged 7-11; 1981, when the children were in their early to mid teens (age 12 to 16); and 1987, when the children were in their late teens and early 20s (age 17 to 22). Parenting measures, based on children's reports, were developed for each wave from items included in the data; constructed variables measuring self-esteem and internal and external expressions of …


Pubertal Development, Parent-Teen Communication, And Sexual Values As Predictors Of Adolescent Sexual Intentions And Sexually Related Behaviors, Cynthia R. Christopherson May 1993

Pubertal Development, Parent-Teen Communication, And Sexual Values As Predictors Of Adolescent Sexual Intentions And Sexually Related Behaviors, Cynthia R. Christopherson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Adolescent sexual intercourse can be viewed as a normal developmental experience, but intercourse also is linked to unplanned pregnancies, Sexually Transmitted Diseases (STDs), and Acquired Immune Deficiency Syndrome (AIDS). Consequently, there continues to be a high level of scientific interest in understanding antecedents of adolescent sexual behavior, especially early and more risky sexual intercourse. This study examined several key antecedents of adolescent sexual intentions and behavior, including pubertal development (pubertal status, change over time, and pubertal timing), parent/teen communication, and teen sexual values. Analyses were based on longitudinal data collected in 1991, 1992, and 1993 from parents and teens during …


Developmental Stages Of Preschool Educators: A Study Of Junior College Students In Taiwan, Hsin-Hui Lin May 1993

Developmental Stages Of Preschool Educators: A Study Of Junior College Students In Taiwan, Hsin-Hui Lin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The present study applies early field experience theory and developmental stages theory as the basis of teacher training in a junior college program in Taiwan. Two hundred sixty-six junior college students from two junior colleges were surveyed in order to ascertain what factors had an effect on the concept of teaching concerns. Comparisons were made among the following: with/ without preschool education background in senior high school, grade, school, age, fathers' educational levels, mothers' educational levels, and fathers' yearly income. The results indicate that early field experiences had a direct effect on teaching concerns. The students' year of study (freshmen …


The Development And Writing Of A Children's Story To Promote An Awareness Of Deaf Culture And American Sign Language, Blaine J. Taylor May 1993

The Development And Writing Of A Children's Story To Promote An Awareness Of Deaf Culture And American Sign Language, Blaine J. Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many advocates of the deaf fear that a whole generation of deaf children will be lost emotionally, socially, and educationally, this fear stems from the fact that many children who are deaf are not having their linguistic, sociocultural. and communicative needs met at home or at school (King, 1993). Their needs are not met primarily for three reasons. First. the hearing culture is often inaccessible to them because they do not understand most of the spoken language around them. When children lack the communicative abilities to interact with the hearing culture, they can not be expected to be knowledgeable of …


The Relationship Between Eating Disorders And Ego Identity Development, Mary Denise Sparks May 1993

The Relationship Between Eating Disorders And Ego Identity Development, Mary Denise Sparks

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The age of onset for eating disorders (anorexia and bulimia nervosa) among females is typically late adolescence. In the present study, it was hypothesized that the onset of eating disorders is related to the late-adolescent developmental task of identity development. Thirty-three late adolescent and young adult females who met DSM-III-R criteria for an eating disorder (anorexia nervosa, bulimia nervosa, or eating disorder not otherwise specified) and 33 control females completed the Extended Objective Measure of Ego Identity status -- 2 (EOMEIS-2). Results of chi square analyses revealed no significant differences between eating disorder and control females with regard to status …


The Impact Of Nutrition Education On Dietary Behavior And Iron Status In Participants Of The Supplemental Food Program For Women, Infants And Children, And The Expanded Food And Nutrition Education Program, Nedra K. Christensen May 1993

The Impact Of Nutrition Education On Dietary Behavior And Iron Status In Participants Of The Supplemental Food Program For Women, Infants And Children, And The Expanded Food And Nutrition Education Program, Nedra K. Christensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was conducted to determine the impact of nutrition education on participants of the Supplemental Food Program for Women, Infants and Children (WIC) and the Expanded Food and Nutrition Education Program (EFNEP). The specific objectives were to: 1) determine the impact of participation in EFNEP on iron status as assessed by hematocrit (hct) and ferritin levels; 2) determine the effect of nutrition knowledge on hct and ferritin values; and 3) determine the effect dietary behavior has on hct and ferritin levels for both WIC and EFNEP participants.

Each study participant completed a 24-hour dietary recall record plus food frequency …


The Relationship Between Perceived Parenting Styles And Adolescent Locus Of Control And Self-Concept, Lisa Ann Mcclun May 1993

The Relationship Between Perceived Parenting Styles And Adolescent Locus Of Control And Self-Concept, Lisa Ann Mcclun

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Relationships between adolescents' perceptions of their parents' responsiveness and demandingness, adolescents' locus of control orientation, and adolescents' self-concept ratings were investigated. Subjects included 198 students from a middle school in northern Utah. Subjects were given the Nowicki-Strickland Internal-External Control Scale for Children, the Harter Self-Perception Profile for Adolescents, and the Perceived Parenting Style Survey.

Results indicated that subjects who perceived their parents as being authoritative had significantly (p < .001) more internal locus of control scores than subjects who reported either the permissive or authoritarian styles. Also, self-concept scores were significantly higher (p < .001) for the authoritative group than the authoritarian group on the Self-Perception Profile for Adolescents subscales of Scholastic Competence, Social Acceptance, Physical Appearance, Behavioral Conduct, Close Friendship, and Global Self Worth. The permissive group reported significantly lower scores (p < .05) on the subscales of Scholastic Competence and Behavioral Conduct. There was also a significant negative correlation (p < .001) between locus of control scores and the subscale scores on the Self-Perception Profile for Adolescents.

Although there were some limitations in the study methodology, the significant differences found between the groups indicated that the authoritative parenting style positively correlates with higher self-concept and …


The Prevalence Of Dual Diagnosis Of Generalized Anxiety Disorder And Alcoholism In The Literature: A Critical Meta-Analytic Review, Joseph B. Stone May 1993

The Prevalence Of Dual Diagnosis Of Generalized Anxiety Disorder And Alcoholism In The Literature: A Critical Meta-Analytic Review, Joseph B. Stone

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The relationship between alcoholism and generalized anxiety disorder (GAD) has been discussed in two research areas: research on the prevalence of GAD in alcoholics, and the prevalence of alcoholism in individuals diagnosed with GAD. Studies indicate that between 6 to 26% of alcoholics have a current diagnosis of GAD, with a lifetime prevalence rate of up 51%. In the general population, 4% would currently receive a diagnosis of GAD, with a lifetime prevalence of 8%.

This meta-analytic review of the empirical literature examines the relationship between GAD and alcoholism. The author used percentages to compare the results of various studies. …


Lack Of Control As A Predictive Factor For Stress-Related Symptoms In Rape Victims, Chad Sombke May 1993

Lack Of Control As A Predictive Factor For Stress-Related Symptoms In Rape Victims, Chad Sombke

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Researchers have agreed that most rape victims experience stress-related symptoms similar to post-traumatic stress disorder. There have also been numerous studies that have tried to predict the severity of those stress-related symptoms, but the literature is inconclusive. Lack of perceived control is consistently mentioned in the rape research literature as being present in rape victims, but no study has empirically examined the relationship between perceived control and a rape victim's stress-related symptoms.

The purpose of this study was to empirically examine the relationship between perceived control and stress-related symptoms in rape victims. This was accomplished by comparing a group of …


Perfectionism In Social Anxiety: Cognitive And Behavioral Correlates, Douglas E. Craig May 1993

Perfectionism In Social Anxiety: Cognitive And Behavioral Correlates, Douglas E. Craig

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to examine the relationship between perfectionism and social anxiety in general as well as social phobia, specifically. Subjects completed the Personal Standards Scale, the Fear of Negative Evaluation scale, and the Social Phobia and Agoraphobia Inventory. Results indicated that neurotic perfectionism is positively associated with both general social anxiety and social phobia. Moreover, the neurotic elements of perfectionism -- "concern over making mistakes" and "doubts about actions" -- appeared to be better predictors of social anxiety than high performance standards alone. Differences between social phobia and social anxiety secondary to agoraphobia as related to …


A Meta-Analytical Review Of The Literature On The Efficacy Of The Systematic Training For Effective Parenting (Step) Program, David George Gibson May 1993

A Meta-Analytical Review Of The Literature On The Efficacy Of The Systematic Training For Effective Parenting (Step) Program, David George Gibson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An analysis of previous reviews of the parent education literature revealed that few reviewers have incorporated sound methodological practice in their review process. Most reviewers included too few studies and ignored important information about the primary research studies that they reviewed. The Systematic Training for Effective Parenting (STEP) program has received less attention from reviewers than any of the other popular programs and information about its effectiveness is lacking.

Forty primary research studies, addressing the effectiveness of the STEP program, were located and analyzed using the meta-analytic method of review. Research questions for this study addressed the issues of effectiveness …


Single Mothers: The Impact Of Work On Home And The Impact Of Home On Work, Lenore I. Rasmussen Robbins May 1993

Single Mothers: The Impact Of Work On Home And The Impact Of Home On Work, Lenore I. Rasmussen Robbins

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to assess the relationships between family/home satisfaction and job satisfaction of single working mothers with at least one child under the age of 18 living at home. The principal objectives were to identify the stressful situations in the lives of working single mothers and the factors that contributed to home satisfaction and work satisfaction. Data were gathered by survey questionnaire from single working mothers presently living in Iron County, Utah. Factor analysis was used to reduce data into home satisfaction and work satisfaction factors that were analyzed by multiple regression to determine the variance …


Training Seminars For Regular Education Teachers: Preparing To Teach Students Who Are Deaf In The Hearing Classroom, K'Leis H. Young May 1993

Training Seminars For Regular Education Teachers: Preparing To Teach Students Who Are Deaf In The Hearing Classroom, K'Leis H. Young

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

"Increased numbers of children who bear the medical label 'deaf' or 'hard of hearing' are being integrated today into regular classes with their hearing peers in preschool, elementary and secondary schools of the United States" (Northcott, 1980, p. 1 ) . Luckner (1992) related that approximately 79% of deaf and hard of hearing students have been served in mainstream settings. Regular education teachers were being asked to educate students who are deaf and hard of hearing with those who have no hearing difficulty.


The Development And Writing Of A Children's Story To Promote An Awareness Of Deaf Culture And American Sign Language, Blaine J. Taylor May 1993

The Development And Writing Of A Children's Story To Promote An Awareness Of Deaf Culture And American Sign Language, Blaine J. Taylor

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Many advocates of the deaf fear that a whole generation of deaf children will be lost emotionally. socially. and educationally. This fear stems from the fact that many children who are deaf are not having their linguistic. sociocultural. and communicative needs met at home or at school (King, 1993). Their needs are not met primarily for three reasons. First. the hearing culture is often inaccessible to them because they do not understand most of the spoken language around them. When children lack the communicative abilities to interact with the hearing culture. they can not be expected to be knowledgeable of …


Photo Manipulation And Its Effect On Future Credibility Of Documentary Photojournalism, Douglas M. Lind May 1993

Photo Manipulation And Its Effect On Future Credibility Of Documentary Photojournalism, Douglas M. Lind

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With today's increased use of computers and computer technology in newspaper photo departments, digitally transmitted and managed images are quickly becoming standard practice. In one sense, this is a tremendous boon for the industry. On the other hand, the electronic age is potentially harmful to the documentary nature of photojournalism. Unlike advertising or fine art photography, documentary photojournalism is a record, a visual witness if you will, of actual events and happenings. People consider such photos as being a view of the facts.

With the new technology comes the ability to change those facts, to create a lie. Therein rests …


Analysis Of Ties, Tie Systems, And Attachment Methods Of Fibrous Sandals Of Tsegi Phase (Pueblo Iii) Kayenta Branch, From Tsegi Canyon, Arizona, Diana Law Christensen May 1993

Analysis Of Ties, Tie Systems, And Attachment Methods Of Fibrous Sandals Of Tsegi Phase (Pueblo Iii) Kayenta Branch, From Tsegi Canyon, Arizona, Diana Law Christensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Forty-three Pueblo III sandals and sandal fragments from four sites in Tsegi Canyon, Arizona, were analyzed to develop tie terminology, identify possible correlation of tie system to sandal construction, and identify characteristics for future tie research. Each piece of sandal tie cordage was analyzed for tie system type, tie attachment method, and tie cordage structure.

Three overall tie systems were found: toe-heel tie systems (nine sandals), criss-cross tie system (one sandal), and side loop tie systems (fifteen sandals) Five additional sandals (narrow, two-warp plainweave construction) had possible toe-heel tie systems. Tie systems of six sandals were not distinguishable between toe-heel …


Montpelier, Idaho's Locomotive Firemen And Enginemen: A Community Of Railroaders, 1900-1920, Kimball M. Fife May 1993

Montpelier, Idaho's Locomotive Firemen And Enginemen: A Community Of Railroaders, 1900-1920, Kimball M. Fife

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Research for this thesis drew from the records of the Brotherhood of Locomotive Firemen, Re-Echo Lodge #195 of Montpelier, Idaho; the U.S. Censuses for the years 1900, 1910, and 1920; and the Montpelier Examiner, 1900-1920. The study focused on the world of railroad firemen and enginemen from the standpoint of the firemen's union members. A special focus examined the locomotive firemen's experiences of working in a predominantly Mormon settlement and the diversity that the railroaders brought to Montpelier.

Locomotive firemen and enginemen who were union members relied on their solidarity as a body of organized labor for protection of …


Portfolio Assessment As A Means Of Assessing Language Proficiency In Bilingual (Esl/Lep) Students, Christine Boynton May 1993

Portfolio Assessment As A Means Of Assessing Language Proficiency In Bilingual (Esl/Lep) Students, Christine Boynton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Speech-language pathologists are faced with the increasing problem of providing appropriate and nonbiased language assessment of minority language speakers. Currently available measures of language proficiency fail to provide adequate information about a Limited English Proficient student's language to determine the specific abilities and educational needs that he/she has.

Therefore, this study was an investigation of the use of a portfolio assessment method as a means of determining the language proficiency of bilingual Limited English Proficient students. The following measurements and information were included in the portfolio: (1) home and literacy background information, (2) parent, teacher, and student attitude information, (3) …


Characteristics Of College Students Seeking Mental Health Services And Reasons Given For Choosing The Mental Health Service Provider, Ann Leslie Athorp May 1993

Characteristics Of College Students Seeking Mental Health Services And Reasons Given For Choosing The Mental Health Service Provider, Ann Leslie Athorp

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The literature related to college mental health counseling suggested numerous possible factors which were hypothesized to play a significant role in choosing a mental health care agency. A questionnaire was constructed to measure demographics of students utilizing the Utah State University Counseling Center, spontaneous reasons for choosing the center as the preferred mental health agency, and literature-based reasons for the same. Subjects reported that they chose the university counseling center for practical reasons such as cost and location. However, factor analysis of the literature - based reasons endorsed by these subjects suggested that trust in the counseling center and its …


A Study To Examine The Effectiveness Of The Electropalatograph In Elicitation And The Remediation Of A Lateral Lisp In An Adult Client, Nathan Butikofer Apr 1993

A Study To Examine The Effectiveness Of The Electropalatograph In Elicitation And The Remediation Of A Lateral Lisp In An Adult Client, Nathan Butikofer

Undergraduate Honors Capstone Projects

The electropalatograph is an exciting new instrument that is still being researched for clinical use in the remediation of various types of articulation disorders. The electropalatograph gives both client and clinician visual feedback of the client's articulatory productions. Specifically, it allows a client and a clinician to view on a screen exactly where the tongue is placed in relation to the hard and soft palate (McWilliams, 1990).


Morphological And Histochemical Changes In Intercellular Junctional Complexes In Epithelial Cells Of Mouse Small Intestine Upon X-Irradiation: Changes Of Ruthenium Red Permeability And Calcium Content, Z. Somosy, J. Kovács, L. Siklós, G. J. Köteles Apr 1993

Morphological And Histochemical Changes In Intercellular Junctional Complexes In Epithelial Cells Of Mouse Small Intestine Upon X-Irradiation: Changes Of Ruthenium Red Permeability And Calcium Content, Z. Somosy, J. Kovács, L. Siklós, G. J. Köteles

Scanning Microscopy

Changes of calcium-content and permeability of tight junction following X-irradiation were investigated in mouse intestinal epithelial cells by electron microscopy. In the control animals the lower parts of tight junctional area as well as the other junctional elements and the intercellular space are labeled by pyroantimonate precipitates, which contain calcium as revealed by electron spectroscopy and electron energy loss spectrometry. X-irradiation, parallel with morphological changes, lead to rapid decrease of pyroantimonate precipitable calcium content and increase of the permeability of tight junctions indicated by the penetration of ruthenium red into the intercellular space. These changes were readily reversible following 0,5 …