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Control Of One Percent Yield Offset In Reaction Injection Molding., Samuel Mills Peebles Jan 1994

Control Of One Percent Yield Offset In Reaction Injection Molding., Samuel Mills Peebles

LSU Historical Dissertations and Theses

Reaction Injection Molding produces parts that must meet property specifications to be useful. For example a car bumper must have a high impact strength to prevent the car from being damaged during a collision. This research presents a control algorithm that can be implemented to control the part properties of reaction injection molded parts. The part property need not be measurable on line if the property is affected by the reaction conditions within the mold. This is an important feature of the algorithm since many important properties, such as yield strength, cannot be measured without destroying the part. The algorithm …

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Blood Pressure Reactivity And Emotion Among Borderline Hypertensives, Mild Hypertensives, Diabetic Hypertensives, And Normotensives., Alicia G. Pellegrin Jan 1994

Blood Pressure Reactivity And Emotion Among Borderline Hypertensives, Mild Hypertensives, Diabetic Hypertensives, And Normotensives., Alicia G. Pellegrin

LSU Historical Dissertations and Theses

The purpose of this study was to examine the relationship between emotion and blood pressure levels and variability for 80 Caucasian subjects between the ages of 30 and 65 matched on gender. The subjects were divided into four groups: normotensives, untreated borderline essential hypertensives, treated mild essential hypertensives, and Type II diabetic hypertensives. Subjects completed five psychological measures: the Beck Depression Inventory (BDI); State-Trait Anxiety Inventory-trait anxiety (STAI-Tanx); State-Trait Anger Expression Inventory-trait anger (STAXI-Tang); the ratio of anger-in to anger-out (STAXI-IO); and the Autonomic Nervous System Response Inventory (ANSRI). Subjects then recorded their home blood pressures seven times throughout the …

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The Information Content Of Dividend Initiations., Yangpin Shen Jan 1994

The Information Content Of Dividend Initiations., Yangpin Shen

LSU Historical Dissertations and Theses

The purpose of this dissertation is to reexamine the dividend information hypothesis and to provide additional evidence on the nature of the information revealed by dividend initiations. Evidence on (1) announcing firms' stock price reactions, (2) analyst earnings forecast revisions for announcing firms, (3) rivals' stock price reactions, and (4) analyst earnings forecast revisions for rivals will be presented. On average, the stock market reacts positively to the announcement of dividend initiations and the degree of this reaction can be significantly explained by three information proxies: dividend yield, firm size, and trading volume. Moreover, I find that dividend initiation announcement …

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Explicit Memory Bias For Body-Related Stimuli In Eating Disorders., Shannon Buckles Sebastian Jan 1994

Explicit Memory Bias For Body-Related Stimuli In Eating Disorders., Shannon Buckles Sebastian

LSU Historical Dissertations and Theses

This investigation studied the presence of an explicit memory bias for emotional body related stimuli in patients diagnosed with an eating disorder. Explicit memory refers to the recall of stimuli previously presented. Explicit memory tasks are thought to reflect cognitive elaboration mechanisms. Research on depressed patients has found a bias for recalling negatively valenced information and/or a bias against recalling positively valenced information. This study sought to extend this type of memory bias research to eating disorder patients. Three groups were examined, a group of clinical eating disordered women (n = 30), a group of weight preoccupied non-eating disordered individuals …

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Controls On The Sedimentary And Subsidence History Of An Active Plate Margin: An Example From The Tonga Arc (Southwest Pacific), P. D. Clift Jan 1994

Controls On The Sedimentary And Subsidence History Of An Active Plate Margin: An Example From The Tonga Arc (Southwest Pacific), P. D. Clift

Faculty Publications

Provides a record of the sedimentary evolution of the active margin of the Indo-Australian Plate from late Eocene time to the present. Facies analyses of the sediments, coupled with interpretations of downhole Formation MicroScanner logs, allow the complete sedimentary and subsidence history of each site to be reconstructed. The forearc region of the Tofua Arc (Site 841) can be seen to have experienced an initial period of tectonic subsidence dating from 3.5 Ma. Subsidence has probably been gradual since that time, with possible phases of accelerated subsidence, starting at 16.2 and 10.0 Ma. The Tonga Platform (Site 840) records only …

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Characteristics And Cost Analysis Of Injuries & Illnesses In Poultry Processing Operations In Louisiana, C. Vellala, John C. Pine, Brian D. Marx, A. James Farr, Frederick E. Sistler, F. Aghazadeh Jan 1994

Characteristics And Cost Analysis Of Injuries & Illnesses In Poultry Processing Operations In Louisiana, C. Vellala, John C. Pine, Brian D. Marx, A. James Farr, Frederick E. Sistler, F. Aghazadeh

Faculty Publications

In this report, compensable cases of worker injury reported to the Louisiana Office of Workers Compensation have been analyzed for the poultry processing operations for the period 1985 to 1992. The number of employees has steadily increased over the years (1,196 in 1985 and 1,928 in 1990). The incidence rates (per 100 full time employees per year), however, did not reveal an increasing trend, but was highest in 1987 (3.25), followed by 3.11 in 1990. Forty-one percent of the compensable cases were workers employed less than one year on the job. Sprains and strains accounted for the largest percentage of …

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Optimal Preventive Maintenance Strategies For A Production System Subject To Random Shocks., Frances Fertitta Barbera Jan 1994

Optimal Preventive Maintenance Strategies For A Production System Subject To Random Shocks., Frances Fertitta Barbera

LSU Historical Dissertations and Theses

The failure rate of production equipment is usually increasing as wear accumulates with usage. An improved preventive maintenance approach is accomplished through predictive maintenance, where an indicator of wear, like vibration or heat, is measured and used to determine the optimal time of an adjustment (or maintenance) such as realignment, oil change or replacing seals. The state of the unit is restored into the same original "as new" state both after adjustment or failure (followed by a repair). This research will develop mathematical models for a single and two unit production system. In the development of the one unit model, …

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Does Caffeine Have An Ergogenic Benefit On Low-Intensity Exercise Performance In A Warm Environment?, Barry Steven Cohen Jan 1994

Does Caffeine Have An Ergogenic Benefit On Low-Intensity Exercise Performance In A Warm Environment?, Barry Steven Cohen

LSU Historical Dissertations and Theses

The effect of caffeine ingestion upon endurance performance while walking at 45% VO$\sb{2\rm max}$ in a warm environment (27$\sp\circ$C, 48% rh) was examined. Eight moderately trained subjects (aged 21-25 years) walked on a treadmill on 4 separate occasions until exhaustion under 4 different treatment regimens. Two of the treatments consisted of caffeine-containing beverages, while the other 2 included non-caffeine-containing beverages. One hour prior to the start of exercise, the subjects consumed a GatorPro drink with either 5 mg/kg of caffeine, if caffeine was the randomized drink, or placebo (flour). At the start of exercise and every half hour until exhaustion, …

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Hemispheric Function In Motor Skill Learning., Malcolm Maccoll Fairweather Jan 1994

Hemispheric Function In Motor Skill Learning., Malcolm Maccoll Fairweather

LSU Historical Dissertations and Theses

Neuropsychological research examining hemispheric function has recently revealed important, and previously unrecognized, perceptual-motor processing advantages in the left and right hemispheres of the brain. This research has also highlighted verbal-motor disruption problems in the performance of motor skills that may be predictable given an understanding of hemispheric specialization and function. Applied research examining methodology to optimize brain functioning in the learning of motor skills has ignored this neuropsychological research. Instead, applied research interest has focussed upon an individual difference phenomenon known as hemisphericity, which affects approximately 25% of the population. An individual presenting hemisphericity appears biased toward a left or …

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Advanced Gravitational Radiation Transducers With Small Mass And Ultra-Low Temperature Squids., Ziniu Geng Jan 1994

Advanced Gravitational Radiation Transducers With Small Mass And Ultra-Low Temperature Squids., Ziniu Geng

LSU Historical Dissertations and Theses

The transducer and SQUID are two major components for a resonant-mass gravitational wave antenna. They must always have high sensitivity and low noise. In this work, a two-mode superconducting inductive transducer for a three-mode gravitational wave bar antenna is designed. The construction and tests of small mass resonators that form the transducer are described. The experiments and test results of commercial dc SQUIDs at ultra-low temperature are discussed in detail. Special problems arise when SQUIDs are tested at ultra-low temperature in vacuum. We address the problems and provide proper solutions. Our experiments show that the dc SQUID made by Quantum …

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William Bolcom's "Twelve New Etudes For Piano"., Henry Scott Jones Jan 1994

William Bolcom's "Twelve New Etudes For Piano"., Henry Scott Jones

LSU Historical Dissertations and Theses

This study examines William Bolcom's Twelve New Etudes for Piano as a contribution to the evolution of the concert etude for piano solo, describing them mainly from the point of view of technical requirements. Chapter One charts the course of the etude for piano solo in the twentieth century. Chapter Two looks at Bolcom's Etudes in detail, addressing the following: style and format, passage-work, leaps, chords, trills and tremolos, counterpoint, cross-rhythms, stretches, dynamics and tone, pedaling, and new techniques. In the course of the description, several areas are pointed out in which Bolcom has done something new or unusual within …

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Error Correction In Second-Year Students' Compositions: A Comparative Study Of Native And Non-Native Speakers/Instructors Of French., Catherine Annie Jolivet Jan 1994

Error Correction In Second-Year Students' Compositions: A Comparative Study Of Native And Non-Native Speakers/Instructors Of French., Catherine Annie Jolivet

LSU Historical Dissertations and Theses

The purpose of this dissertation was to determine whether or not there are differences between native and non-native speakers/instructors of French when they correct second year students' compositions. The research questions this study set forth to answer are: (1) Are there any differences in the number of corrections performed by native and non-native speakers/instructors of university intermediate French classes when they evaluate compositions? (2) Are there any differences between native and non-native speakers/instructors in the categories (verb, noun, spelling, other) where error correction was performed? (3) Are there any differences between native and non-native speakers/instructors when and if they paid …

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Tracking Dynamic Features In Image Sequences., Sankar Krishnamurthy Jan 1994

Tracking Dynamic Features In Image Sequences., Sankar Krishnamurthy

LSU Historical Dissertations and Theses

This dissertation deals with detecting and tracking dynamic features in image sequences using digital image analysis algorithms. The tracking problem is complicated in oceanographic images due to the dynamic nature of the features. Specifically, the features of interest move, change size and shape. In the first part of the dissertation, the design and development of a new segmentation algorithm, Histogram-based Morphological Edge Detector (HMED), is presented. Mathematical morphology has been used in the past to develop efficient and robust edge detectors. But these morphological edge detectors do not extract weak gradient edge pixels, and they introduce spurious edge pixels. The …

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Effects Of Chromium Picolinate On Growth And Body Composition In The Rat., Deborah Lynn Hasten Jan 1994

Effects Of Chromium Picolinate On Growth And Body Composition In The Rat., Deborah Lynn Hasten

LSU Historical Dissertations and Theses

Several human and animal studies of chromium (Cr) supplementation in the form of Cr picolinate (CrPic) have reported increases in lean body mass, often with concurrent body fat decreases. This 12-week study examined the effects of six dietary levels of CrPic (0, 75, 150, 300, 600, 1500 ppb Cr) upon the growth and body composition of the rat. Ninety male Harlan Sprague-Dawley outbred weanling rats arrived in three groups of 30 animals (referred to as Blocks 1, 2, and 3). Five animals from each block were assigned to each treatment, resulting in a 6 x 3 (treatment x block) Randomized …

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Molecular Marker Linkage Mapping In Southern Pine (Longleaf Pine And Slash Pine)., Thomas Lester Kubisiak Jan 1994

Molecular Marker Linkage Mapping In Southern Pine (Longleaf Pine And Slash Pine)., Thomas Lester Kubisiak

LSU Historical Dissertations and Theses

The goal of this work was to develop molecular markers for use in a backcross breeding program to speed the introgression of genes influencing rapid early height growth (EHG) from slash pine (Pinus elliottii Engelm. var. elliottii) into longleaf pine (Pinus palustris Mill.). The efficacy of molecular markers for genetic mapping in the Pinaceae was determined in segregating haploid and diploid populations. Initial screening for genetic polymorphisms was conducted using the random amplified polymorphic DNA (RAPD) technique. Using DNAs obtained from haploid megagametophytes, a RAPD-based genetic map for longleaf pine clone 3-356 (16 linkage groups and 6 pairs (133 markers) …

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Physiological Variation In Loblolly Pine (Pinus Taeda L.) As Related To Crown Position And Stand Density., Dennis Albert Gravatt Jan 1994

Physiological Variation In Loblolly Pine (Pinus Taeda L.) As Related To Crown Position And Stand Density., Dennis Albert Gravatt

LSU Historical Dissertations and Theses

Physiological parameters were measured under natural light conditions and needle orientation from towers and walkways erected in the crowns of loblolly pine (Pinus taeda L.) trees. Photosynthetic light response curves, chlorophyll content, nutrient content and specific leaf area were determined for current-year foliage on detached branches. Two silvicultural treatments were randomly assigned to the twelve plots in the fall of 1988. Plots were thinned to a density of 731 trees per hectare or left unthinned, at a density of 2990 trees per hectare. The plots were left unfertilized or fertilized with 744 kg per hectare of diammonium triple superphosphate was …

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Interactions Of Mouse And Bovine Preimplantation Embryos Prior To And After The In Vitro Developmental Block Stage., Leyi Li Jan 1994

Interactions Of Mouse And Bovine Preimplantation Embryos Prior To And After The In Vitro Developmental Block Stage., Leyi Li

LSU Historical Dissertations and Theses

The objective of the present study was to evaluate the effect of post-block mouse and bovine embryos on the development of pre-block embryos around the in vitro developmental block stage. The effect of the post-block embryos on the development of the pre-block embryos was evaluated in culture, in chimeras and in cytoplasmic hybrid embryos. The results indicate that post-block embryos were able to stimulate the development of the pre-block embryos in culture. The stimulatory effect of the post-block mouse and bovine embryos was found not to be species-specific and was synergistic with that of bovine granulosa cells. Chimeric parthenogenetic bovine …

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Palmerston, Parliament And Peking: The Melbourne Ministry And The Opium Crisis, 1835-1840., Glenn Paul Melancon Jan 1994

Palmerston, Parliament And Peking: The Melbourne Ministry And The Opium Crisis, 1835-1840., Glenn Paul Melancon

LSU Historical Dissertations and Theses

"Palmerston, Parliament and Peking" is a revisionist work designed to challenge the prevailing economic interpretations of the first Opium War, 1839-1842. Orthodox historiography considers early nineteenth-century Britain as a modern, industrial society and argues that its Government needed to respond violently to the Chinese authorities' suppression of the opium trade in order to protect and expand a lucrative endeavor. Indian opium sales generated revenue for the British-run government in Bengal and paid for Chinese tea, a highly prized commodity in Great Britain. British industrialists demanded war to end the Chinese Government's restrictions on trade, known as the Canton system, thus …

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A Confederate Education In The New South: Southern Academia And The Idea Of Progress In The Nineteenth Century., Danny Ray Frost Jan 1994

A Confederate Education In The New South: Southern Academia And The Idea Of Progress In The Nineteenth Century., Danny Ray Frost

LSU Historical Dissertations and Theses

The idea of progress inspired former Confederate officers who entered academia to transform Southern higher education from its antebellum classical and republican orientation to a postbellum focus on science and utility. Defeat taught these academics that Southern institutions had failed to supply graduates with the scientific skills necessary to compete economically, industrially, and militarily with the North. They concluded that the Confederacy's collapse demonstrated the necessity of abandoning the republican conception of progress, characterized by fears of cyclical decay, in favor of the modern idea of progress which emphasized inevitable and unlimited material and social improvement. Confederate-veterans-turned academics believed scientific …

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Development Of Nuclear Quadrupole Resonance Spectroscopic And Imaging Methods., Youngil Lee Jan 1994

Development Of Nuclear Quadrupole Resonance Spectroscopic And Imaging Methods., Youngil Lee

LSU Historical Dissertations and Theses

Solution-state nuclear magnetic resonance (NMR) of $\sp1$H and $\sp{13}$C nuclei in molecular species is very common as is solid-state NMR of $\sp{13}$C in a wide variety of substances. Yet many nuclei remain little studied by conventional NMR techniques, for example $\sp2$H, $\sp{11}$B, $\sp{14}$N, $\sp{79}$Br, $\sp{81}$Br, and $\sp{93}$Nb. One method for their study is nuclear quadrupole resonance (NQR). Briefly, the reason that quadrupolar nuclei are difficult to study with conventional NMR techniques is the exceedingly large line widths these nuclei exhibit in high magnetic fields. The first part of my dissertation deals with NQR spectroscopic techniques developed to obtain structural information …

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Simulation And Testing Of A Vibrating Digger Blade For Root Crops., Luis Arnoby Rodriguez Hurtado Jan 1994

Simulation And Testing Of A Vibrating Digger Blade For Root Crops., Luis Arnoby Rodriguez Hurtado

LSU Historical Dissertations and Theses

The performance of a vibrating digger blade machine was simulated in the laboratory and evaluated in the laboratory and in the field. The machine generated three modes of vibration: horizontal, vertical and their combination. A set of fifty-two tests replicated three times were performed in the field by varying amplitude (2 values), forward speed (2 values), and velocity ratio (2 values) for horizontal and vertical oscillation and amplitude combination (4 values), forward speed (2 values) and phase angle (4 values) for combined vibration. The tests were conducted in a silty-loam soil with the following characteristics: bulk density 1115.2 kg/m$\sp3$, moisture …

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Breeding Wheat For Resistance To Bacterial Leaf Streak Caused By Xanthomonas Campestris Pv. Translucens., Barry Lawrence Tillman Jan 1994

Breeding Wheat For Resistance To Bacterial Leaf Streak Caused By Xanthomonas Campestris Pv. Translucens., Barry Lawrence Tillman

LSU Historical Dissertations and Theses

Bacterial leaf streak or black chaff caused by Xanthomonas campestris pv. translucens (Xct) can cause yield loss in wheat, especially in warm, high rainfall environments. Bactericidal chemicals have not been effective in controlling the disease, however, host resistance to leaf streak may be an effective control measure. Studies were conducted in the field and greenhouse to determine the relationship between the black chaff and leaf streak symptoms caused by Xct, to quantify yield loss, to calculate the heritability of leaf streak reaction and to evaluate germplasm for resistance to leaf streak. The results showed that 'Florida 304' is very susceptible …

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Critical Chorology And Peasant Production: Small Farm Forestry In Hojancha, Guanacaste, Costa Rica., Michael Stephen Yoder Jan 1994

Critical Chorology And Peasant Production: Small Farm Forestry In Hojancha, Guanacaste, Costa Rica., Michael Stephen Yoder

LSU Historical Dissertations and Theses

The "new regional geography" is an attempt to fuse traditional regional geography's concerns with cultural and environmental uniqueness of places, with political economy's regard for the nature of global and local structures guiding resource allocation. The approach infuses chorology with theory, and political economy with place-specific empirical research. Most studies exemplifying the new approach have been of industrial localities of Europe and North America. This dissertation is a case study of regional transformation in a Third World locality, the canton of Hojancha, in Costa Rica's Nicoya Peninsula. The approach utilized is "critical chorology," a variant of the new regional geography …

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Communicating With The Elderly: Gender And Contact Differences In Prototypes, Hesitation Phenomena, Proxemics, And Interaction Evaluations., Lynn B. Wellman Jan 1994

Communicating With The Elderly: Gender And Contact Differences In Prototypes, Hesitation Phenomena, Proxemics, And Interaction Evaluations., Lynn B. Wellman

LSU Historical Dissertations and Theses

The purpose of the present dissertation was to examine some of the perceptions younger adults have about the elderly, communication behaviors during a cross-generational interaction, and evaluations of the interaction. The present investigation used an experimental design that included the following two independent variables: (1) gender and (2) amount of interaction (or contact) a younger adult has with elderly people. Subjects were categorized into high, medium, or low contact groups based on self-reports. The study consisted of an initial survey, an experiment (younger subjects interviewed by an elderly confederate), and a postinteraction survey. The gender and contact factors were investigated …

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A Specification Environment That Supports The Prototyping Of Distributed Systems Using An Object-Oriented Model., Abbas Dehkhoda Jan 1994

A Specification Environment That Supports The Prototyping Of Distributed Systems Using An Object-Oriented Model., Abbas Dehkhoda

LSU Historical Dissertations and Theses

High-speed computer networking, interactive service, and incremental growth for computing are some of the motivations for developing a distributed system. Despite the inherent benefits of a distributed system, the development of software support is more difficult for distributed systems than for sequential systems. In either case, difficulties may arise from the communication problems between two groups of people with different backgrounds trying to formulate requirements for the system. This process depends on feedback and may take many iterations to converge. Customers can usually recognize the features they need when they start using a system, which makes prototyping an important tool …

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A Comparison Of The Effects Of Multiple Visual Examples And Nonexamples Versus Prototypical Examples On Science Concept Learning: An Exploratory Study Based Upon The Concept Of Photosynthesis., Eleanor Deane Abrams Jan 1994

A Comparison Of The Effects Of Multiple Visual Examples And Nonexamples Versus Prototypical Examples On Science Concept Learning: An Exploratory Study Based Upon The Concept Of Photosynthesis., Eleanor Deane Abrams

LSU Historical Dissertations and Theses

Two researcher-produced, standard-length videos on photosynthesis (and accompanying ancillary materials) were developed with the input of educators and content experts. The control treatment video script contained the standard number of prototypical examples and graphics based high school textbooks. The experimental treatment video script was based on the theory of conceptual change. Two student focus groups met daily for one week and reviewed portions of the original experimental treatment script for clarity, brevity, and choice and placement of examples and nonexamples. Their suggestions and conceptual change have implications for curriculum design. The main research question of this study was: Do students …

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Development And Construct Validation Of An Instrument To Measure Caring In The Helping Professions., Barbara Spruill Moffett Jan 1994

Development And Construct Validation Of An Instrument To Measure Caring In The Helping Professions., Barbara Spruill Moffett

LSU Historical Dissertations and Theses

The primary purpose of this study was to investigate the construct of caring in the helping professions and to develop an instrument to measure the affective component of caring in the specific context of professional nursing. The study involved development of a conceptual framework for the construct of caring, instrument development, and examination of validity evidence using multiple criteria. The sample for this study included 421 registered nurses employed in randomly selected acute care settings. Each participant completed the Caring Inventory for Nurses (CI-N) which included 40 items representing four hypothesized dimensions: receptivity, responsivity, moral/ethical consciousness and professional commitment. Seven …

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The Ten Violin Concertos Of Charles-Auguste De Beriot: A Pedagogical Study., Nicole De Carteret Hammill Jan 1994

The Ten Violin Concertos Of Charles-Auguste De Beriot: A Pedagogical Study., Nicole De Carteret Hammill

LSU Historical Dissertations and Theses

Charles-Auguste de Beriot (1802-70) was a Belgian violinist, composer, and teacher. He was trained in his youth in Belgium and in the early 1820s travelled to Paris and studied briefly with the noted teacher Pierre Baillot at the Paris Conservatoire. He then embarked upon a solo career and from 1829 to 1836 he toured with the famed opera singer Maria Malibran, whom he married in 1836. In 1842, after declining an offer to replace Baillot at the Paris Conservatoire, Beriot accepted a position at the Brussels Conservatoire. He remained there until his retirement due to failing eyesight in 1852, and …

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Effects Of Heat, Lactic Acid, And Modified Atmosphere Packaging On Listeria Monocytogenes On Cooked Crawfish Tail Meat., Warren Joseph Dorsa Jan 1994

Effects Of Heat, Lactic Acid, And Modified Atmosphere Packaging On Listeria Monocytogenes On Cooked Crawfish Tail Meat., Warren Joseph Dorsa

LSU Historical Dissertations and Theses

The generation time of L. monocytogenes was calculated to be 72.2, 28.5, 17.01, and 6.9 h on crawfish tail meat held at 0, 4, 6, and 12$\sp\circ$C, respectively. Potassium sorbate (PS) (0.3%) spray treatments on crawfish held at 4$\sp\circ$C, extended the lag phase of the bacterium. However, once exponential growth began, a generation time not significantly different (P $>$ 0.05) than that of untreated crawfish was observed. Samples sprayed with 0.3% citric acid (CA) and held at 4$\sp\circ$C supported growth of the bacterium equally well as that of untreated samples. Thermal inactivation of L. monocytogenes using a three neck …

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Synthesis Of Tryptophan And Tyrosine Derivatives., Li Shui Jan 1994

Synthesis Of Tryptophan And Tyrosine Derivatives., Li Shui

LSU Historical Dissertations and Theses

$\alpha$-Amino acids serve a central role in biology and chemistry. With the advance of a variety of sophisticated spectroscopic and computational methods to elucidate the relationships between amino acid sequence, protein conformation, and their chemical, physical, and biological properties, a tremendous level of interest has been generated in the de novo design and synthesis of unnatural amino acids for the purposes of imparting enzyme-inhibitory, antimetabolite, protease resistance, and unique conformational properties to peptides and derivatives. The goal of this research work was to synthesize tryptophan and tyrosine derivatives, which are conformationally constrained, with fixed side-chain to prevent $\alpha$-$\beta$ and/or $\alpha$-$\beta$ …

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