Worldwide, millets are regarded as significant grains; however, they are the least exploited. Millet grain is abundant in nutrients and health-beneficial phenolic compounds, making it suitable as food and feed. The diverse contents of nutrients and phenolic compounds present in finger and pearl millet are good indicators that the variety of millet available is important when selecting it for use as food or feed. The phenolic properties found in millets comprise of phenolic acids, flavonoids, and tannins, which are beneficial to human health. Research has shown that millet phenolic properties have high antioxidant activity. Phytochemicals present in millet grains have positive effects on human health by lowering the cholesterol and phytates in the body. The frantic demands on maize and its uses in multiple industries have merit the search for alternative grains, to ease the pressure. Substitution of maize with pearl and finger millets in the diets of different animals resulted in positive impact on the performance. Of late, millet grain has been incorporated in other foods and used to make traditional beverages. In Chapter 1, the topic of the research was introduced, stating the importance of the study and to motivate on the significance of millet grains. Aims and objectives were also listed. Chapter 2 presented extensive literature review on millet and their uses in human and livestock nutrition. In addition, the use of tannin as alternative feed was also reviewed. Different studies have been conducted to investigate the suitability of millet grain as an energy source, in the animal industry. However, studies on the Southern African types of millet are limited; this might be due to lack of information on their nutritional composition and their suitability as animal feed. Overall, the aim of this study was to profile the nutritional characteristics of selected millet grains in South Africa and Zimbabwe, their suitability as energy source for human and livestock and to study the effect of pearl millet type on the performance indices of Ross 308 broiler chickens. In Chapter 3, the general materials and methods used to reach the scientific conclusion for this study was summarised. In Chapter 4, physical and chemical analysis were conducted on millet grains obtained from South Africa and Zimbabwe, the results revealed that the physiochemical characteristics of the millet grain qualify it as a suitable candidate in replacing maize as an energy source. To further understand the characteristics of the millet grain, Chapter 5 analysed the phenolic compounds available in the millet grain obtained from South Africa and Zimbabwe. The results showed that the grain is endued with valuable phenolic compounds beneficial in the nutrition of both human and animals and aid as health benefit. Chapter 6 investigated the various inclusion levels of pearl millet in a bid to establish the most suitable combination for the poultry sector. Pearl millet grain used in this experiment went through different breeding improvements and selections conducted at the Grain Crop Institute in Potchefstroom, South Africa. Pearl millet grain was used as the main source of energy for Ross 308 broiler chicks for a period of 42 days with performance indices investigated. The results revealed that pearl millet can be incorporated in the diets of broiler chickens, in replacement of maize, without adversely affecting the performance. In addition, the economic justification of replacing maize with pearl millet was studied. The cost of the grains was determined and the cost per weight gain was determined. The results showed that indeed it is economically sound to replace maize with pearl millet in the diet of poultry. The quadratic function best fitting optimum treatment combination in relation to performance parameters such as body weight, body weight gain, feed conversion ratio and internal organs was also examined. In Chapter 7, the research was generally discussed to tie up the conclusions of the experiments conducted. General recommendations were also given on the compounds of millet varieties and their health benefits to both humans and animals. / Kuwo wonke umhlaba, amabele athathwa njengezinhlamvu ezibalulekile, kodwa awasetshenziswa kakhulu. Uhlamvu lwebele lunemisoco eminingi kanye nenzuzo yempilo ngama-phenolic compound, okwenza ukuthi afaneleke kakhulu njengokudla kwabantu kanye nemfuyo. Imisoco eminingi equkethwe kanye nama-phenolic compound atholakala eminweni kanye nezinhlamvu zebele ayizinkomba ezinhle zokuthi izinhlobo zamabele ezitholakalayo zibaluleke kakhulu ekukhethweni njengokudla kanye nokudla kwabantu noma imfuyo. Amaphenolic properties atholakala kumabele aqukethe ama-phenolic acids, ama-flavonids, kanye nama-tannins, ayinzuzo kakhulu empilweni yabantu. Ucwaningo luthole ukuthi ama-phenolic properties amabele anomsebenzi wezinga eliphezulu lama-antioxidant. Ama-phytochemicals atholakala kwizinhlamvu zamabele anenzuzu enhle kakhulu kwimpilo yabantu ngokwehlisa izinga le-cholesterol kanye nama-phytate emzimbeni. Ukudingeka kakhulu kombila kanye nokusetshenziswa kwawo kwizimboni eziningi, kubangele ukuthi kwenziwe ucwaningo ngezinye izinhlamvu ukwehlisa ingcindezi. Ukuthatha isikhundla sombila, sithathwa amabele kwidayethi yezilwane ezehlukene kwaba nomphumela omuhle kakhulu ngokusebenza. Kamuva nje, izinhlamvu zamabele zifakelwe kwezinye izidlo ezisetshenziswa ukwenza iziphuzo zomdabu. Kwisahluko 1, isihloko socwaningo sethulwa khona, ukuchaza ukubaluleka kocwaningo kanye nokuqikelela ngokubaluleka kwezinhlamvu zamabele. Izinhloso nezinjongo nazo zifakelwe kuhla. Isahluko 2, sethula ukubuyekezwa kwemibhalo ngamabele kanye nokusetshenziswa kwawo kubantu kanye nokudla kwemfuyo. Nangaphezu kwalokho, ukusetshenziswa kwe-tannin njengokunye ukudla kwemfuyo kuye kwabuyekezwa. Kwenziwe ucwaningo olwehlukene ukuphenyisisa ngokufaneleka kwezinhlamvu zamabele njengomthombo wamandla (we-eneji) kwimboni yezilwane. Kodwa, ucwaningo ngezinhlobo zamabele eNingizimu ne-Afrika alukenziwa ngokwanele; lokhu kungenzeka kungenxa yokuswelakala kolwazi ngemisoco equkethwe kanye nokufaneleka njengokudla kwezilwane. Kanti ngokwengamele, inhloso yalolu cwaningo bekuwukwenza iprofayili yemisoco ngezinhlamvu zamabele athile eNingizimu Afrika kanye naseZimbabwe, ukufaneleka kwawo njengomthombo wamandla (we-eneji) kubantu kanye nemfuyo, kanye nokwenza ucwaningo ngemiphumela yenhlobo yamabele ngama-performance indices wamachwane e-ROss 308. Kwisahluko 3, kusetshenziswe imetheriyali kanye namamethodi asetshenzisiwe ukufinyelela isiphetho sezesayense kulolu cwaningo, kwafinyezwa. Kwisahluko 4 kwenziwe uhlaziyo lokubambekayo kanye namakhemikhali ngezinhlamvu zamabele ngokutholakale eNingizimu Afrika kanye naseZimbabwe, imiphumela ikhombise ukugqama kwe-physiochemical kwezinhlamvu zamabele ukufaneleka kwazo njengekhandideti ekuthatheni isikhundla sombila njengomthombo wamandla. Ukuqhubeka nokuqondisisa ukuphawuleka kwezinhlamvu zamabele, iSahluko 5 sihlaziye ama-phenolic compound kwizinhlamvu zamabele aseNingizimu Afrika neZimbabwe. Imiphumela ikhombisa ukuthi uhlamvu lwamabele lunama-phenolic compound ayinzuzo ekudleni okunomsoco kubantu kanye nezilwane, kanye nokuba wusizo lwenzuzo kwimpilo. Isahluko 6 siphenyisise ngamazinga okubandakanywa kwamabele ukwenzela ukuthola ukufaneleka kwawo kumkhakha wezinkukhu. Izinhlamvu zamabele e-pearl zisetshenziswe kule ekspirimenti, eyenziwa ezigabeni ezehlukene zokuthuthukisa ukuzalisa kanye nokhetho olwenziwe ngabe-Grain Crop Institute ePotchefstroom, eNingizimu Afrika. Amabele e-pearl asetshenziswe njengomthombo omkhulu we-eneji kumachwane eRoss 308 isikhathi sezinsuku ezingu 42 kanti kwaphenyisiswa ngokusebenza kwama-indices. Imiphumela iveze ukuthi amabele epearl angafakelwa kwidayethi yamachwane, ukuthatha isikhundla sombila, ngaphandle kokuphazamisa ukusebenza. Nangaphezu kwalokho, ukufaneleka kwezomnotho ngokuthatha isikhundla zombila sithathwa ngamabele e-pearl kuye kwacwaningwa. Izindleko zezinhlamvu ziye zabekwa kanti futhi nesisindo ngezinhlamvu kuye kwabekwa. Imiphumela ikhombisa ukuthi kuyinto enhle kwezomnotho ukuthatha isikhundla sombila sithathwa ngamabele e-pearl kwidayethi yezinkukhu. Ukusebenza kwe-quadratic function kufaneleke kakhulu kwi-optimum treatment combination mayelana nama-parameter okusebenza afana nokwenyuka kwesisindo somzimba, ukuguqula i-feed conversion ratio kanye nezitho zangaphakathi nazo ziye zahlolwa. KwiSahluko 7, ucwaningo kuye kwaxoxwa ngalo ukuhlanganisa iziphetho zama-ekspirimenti enziwe. Izincomo ezinabile, ziye zanikezwa ngama-compound ezinhlobo zamabele kanye nezinzuzo zawo kwezempilo kubantu kanye nezilwane / Lefaseng ka bophara, leotša le bonwa bjalo ka mabele a bohlokwa kudu; le ge go le bjale, ke dibjalo tšeo di sa bjalwego kudu. Dithoro tša leotša di tletše ka phepo ye ntši le ditswaki tša fenoliki tšeo di nago le mohola maphelong, gomme se sa dira gore di be maleba bjalo ka dijo le phepo. Dikagare tša lona tšeo di fapafapanego le ditswaki tša fenoliki tšeo di whetšagalago ka gare ga leotša la finger le la pearl ke dilaetši tše kaone tša gore mehutahuta ya leotša yeo e hwetšagalago e bohlokwa ge e kgethwa bjalo ka sejo le phepo. Diteng tša fenoliki tšeo di hwetšwago ka agre ga leotša di na le diesiti tša fenoliki, difolabanoite, le dithaninse, tšeo di lego mohola go maphelo a batho. Dinyakišišo di laeditše gore diteng tša fenoliki tša leotša di na le mošomo wa godimo wa dihlwekišammele tšeo di bitšwago dianthioksitente. Difaethokhemikhale tšeo di lego gona ka gare ga dithoro tša leotša di na le diabe tše kaone go maphelo a batho ka go fokotša kholesterole le difaetheite mmeleng. Dinyakwa tša ka pela go lefela le mešomo ya lona ka diintastering tše ntši di dirile gore go be le nyakego ye kgolo ya dithoro tše dingwe tšeo di ka emelago lefela legato, go nolofatša kgatelelo yeo e beilwego go lefela. Go tšeela lefela legato ka leotša la pearl le la finger ka dijong tša diphoofolo tšeo di fapafapanego go feleleditše ka seabe se sekaone ka ga go šoma ga lona. Go fihla mo lebakeng le, dithoro tša leotša di tsentšwe ka dijong tše dingwe gomme tša šomišwa go dira dino tša setšo. Ka go Kgaolo ya 1, hlogotaba ya dinyakišišo e tsebagaditšwe, ya fa bohlokwa bja dinyakišišo tše le lebaka mabapi le bohlokwa bja dithoro tša leotša. Maike mišetšo le dinepo le tšona di filwe. Kgaolo ya 2 e hlagišitše tekodišišo ya dingwalwa ye e tseneletšego ka ga leotša le mešomo ya lona go phepo ya batho le ya diphoofolo. Godimo ga fao, tšhomišo ya tannin bjalo ka phepo ya boikgethelo le yona e lekodišišitšwe. Dinyakišišo tše di fapafapanego di dirilwe go nyakišiša go ba maleba ga thoro ya leotša bjalo ka methopo wa enetši, ka intastering ya diphoofolo. Le ge go le bjale, dinyakišišo tš0e di dirilwego mabapi le mehuta ya leotša ka Borwa bja Afrika ke tše nnyane; se se ka ba se bakwa ke tlhoklego ya Tshedimošo mabapi le sebiopego sa phepo ka hare ha leotša le go ba maleba ga lona bjalo ka phepo ya diphoofolo. Ka kakaretšo, maikemišetšo a dinyakišišo tše e bile go lebeledišiša dikokwane tša phepo tša dithoro tša leotša tšeo di kgethilwego ka Afrika Borwa le ka Zimbabwe, go ba maleba ga lona bjalo ka methopo wa enetši go batho le go diruiwa le go nyakišiša ka ga seabe ka ga mohuta wa leotša wa pearl go go šoma ga dipalopalo go dikgogo tša nama tša Ross 308. Ka go Kgaolo ya 3, ditlabelo le mekgwa ka kakaretšo yeo e šomišitšwego go fihlelela sephetho sa tša mahlale sa dinyakišišo tše di filwe kakaretšo. Ka go Kgaolo ya 4, tshekatsheko ya naga le ya dikhemikhale e dirilwe mabapi le dithoro tša leotša tšeo di hweditšwego ka Afrika Borwa le ka Zimbabwe, dipoelo di utollotše gore dikagare tša dikhemikhale tša thoro ya leotša di le dira le be lebele leo le loketšego go tšeela legato lefela bjalo ka methopo wa enetši. Go kwešiša go tšwela pele dikagare tša thoro ya leotša, Kgaoilo ya 5 e sekasekile diteng tša fenoliki tšeo di hwetšagalago ka gare ga thoro ya leotša leo le hwetšago ka Afrika Borwa le ka Zimbabwe. Dipoelo di laeditše gore thro ya leotša le tletše ka dikagare tša fenoliki tšeo di lego mohola go phepo ya bobedi batho le diphoofolo le gore le thuša bjalo ka kholego ya tša phepo. Kgaolo ya 6 e nyakišišitše maemo a mehutahuta a kakaretšo a leotša la pearl ka nepo ya go hwetša motswako wa maleba kudu ka lekaleng la dikgogo. Dithoro tša leotša la pearl tšeo di šomišitšwego ka mo tekodišišong ye di sepedišitšwe ka go dikaonafatšo tše di fapanego tša monontšha gomme dikgetho di dirilwe ka go Sehlongwa sa Dibjalo tša Dithoro ka Potchefstroom, ka Afrika Borwa. Dithoro tša leotša la pearl di šomišitšwe bjalo ka mothopo wa enetši go matswiana a nama a Ross 308 mo matšatšing a 42 fao go dirilwego dinyakišišo ka ga dipalopalo tša go gola ga dikgogo. Dipoelo di laeditše gore leotša la pearl le ka tsenywa ka dijong tša dikgogo tša nama, go tšeela legato lefela, ka ntle le go ama gampe go gola ga dikgogo. Godimo ga fao, lebaka la tša ekonomi la go tšeela lefela legato ka leotša la pearl le nyakišišitšwe. Theko ya dithoro e hweditšwe gomme theko ka boima bjo itšego le yona e hweditšwe. Dipoelo di laeditše gore ka nnete go tloga go kwagalago kudu go tša ekonomi go tšeela lefela legato ka leotša la pearl. Mošomo wa tekanelo wa wo o loketšego bokaone motswako wa tlhokomelo ya godimo mabapi le mahlakore a kgodišo ya dikgogo a go swana le boima bja mmele, go nona, rešio ya go fetošetša dijo le ditho tša ka gare le ona o lekodišišitšwe. Ka go Kgaolo ya 7, dinyakišišo di hlalošitšwe ka kakaretšo gore go fihlelelwe sephetho ka ga ditekodišišo tšeo di dirilwego. Ditšhišinyo ka kakaretšo le tšona di filwe mabapi le dikagare tša mehutahuta tša leotša le dikholego tša ona go tša maphelo go bobedi batho le diphoofolo / College of Agriculture and Environmental Sciences / D. Phil. Agr. (Animal Science)

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Det finns många olika typer av preventivmedel för kvinnor, där en av de vanligaste är kombinerade hormonella p-piller. Många kvinnor vill undvika hormonella preventivmedel och använder sig av andra metoder för att undvika graviditet. Intressanta alternativ till hormonella preventivmedel har kommit de senaste åren, där en av dem är mobila applikationen Natural Cycles, som baserar sig på fertilitetsmedvetenhet.  Befintliga studier finns som undersöker hur effektivt och säkert Natural Cycles är som preventivmedel. Syftet med detta arbete är att undersöka applikationen Natural Cycles som preventivmedel, detta genom att jämföra Pearl Index och sannolikheten att bli gravid efter ett visst antal cykler av befintliga studier, och undersöka vilken demografi som Natural Cycles är bäst lämpad för.  Arbetet är en litteraturstudie där fem vetenskapliga artiklar analyserats. Studierna är hämtade från databasen PubMed och Google Scholar, och visar att Natural Cycles effektivitet med ett Pearl Index vid typisk användning är mellan 6,1–7,0. Detta visar att Natural Cycles effektivitet som preventivmedel är lika bra som tex. kombinerade hormonella p-piller, men sämre jämfört med tex. hormonspiral. Sannolikhet för graviditet efter en 13-cykelperiod för Natural Cycles beräknades till 6,3–8,3 %. Natural Cycles passar bäst för kvinnor runt 30 års ålder, som är i ett förhållande, har en högre utbildning och som tidigare använt kondom som preventivmedel.  Att tänka på är att alla studier som undersökts i detta arbete har varit sponsrade av just Natural Cycles, vilken kan ha påverkat resultatet. Det behövs göras mer forskning under längre tid och för större mångfald, och även göra studier som inte är sponsrade av Natural Cycles. / There are many different contraceptive methods for women and one of the most common are the combined hormonal birth control pills. Many women want to avoid hormonal contraceptive methods to prevent pregnancy. Interesting alternatives to hormonal contraceptives have emerged in recent years, and one of these is the mobile application Natural Cycles, which is based on fertility awareness. Existing studies are available that examine the effectiveness of Natural Cycles as a contraceptive.   The aim of this study is to investigate the effectiveness of the application Natural Cycles as a contraceptive, by comparing the Pearl index and the probability of becoming pregnant after a certain number of cycles of existing studies and also examine demographic which Natural Cycles is best suited for. This study is organized as a literature study, in which five scientific articles were analyzed. The studies were obtained from the database PubMed and Google Scholar and show that the effectiveness of Natural Cycles with a typical-use Pearl Index is between 6,1-7,0. This shows that Natural Cycles' effectiveness as a contraceptive is as good as e.g. combined hormonal birth control pills, but poorer compared to e.g. hormonal intrauterine device. The probability of pregnancy after a 13-cycle period for Natural Cycles was estimated to 6.3–8.3%. Natural Cycles is best suited for women around the age of 30, who are in a relationship, have a higher education and who have previously used a condom as a contraceptive. It should be borne in mind that all studies examined in this work have been sponsored by Natural Cycles, which may have affected the results. More research is needed for a longer period and for greater diversity, and to do studies that are not sponsored by Natural Cycles.

This work places itself in the field of knitted textile design and the context of body and interior. The primary motive is to investigate the tactile and visual properties of oysters and pearls, inspired by Botticelli’s painting Venus. The aim is to explore free-flowing and texture through knitted three-dimensional textile surfaces. Material and colour choices have been made based on the source of inspiration, the oyster, and investigated on industrial circle knit and flat knit machines. The circle knit’s expression has been explored from a hand knitting perspective, using the manual elements to push the machine’s technique to design new expressions. The result of the project is a collection that has four suggestions for a knitted, three-dimensional surface, each inspired and developed from one specific part of the oyster; the shell, the nacre, the flesh, and the pearl. This work investigates the potential of using circle knit machines, commonly used in fast fashion for bulk production, as a tool for handicraft and higher art forms. The final collection pushes the conversation regarding the future uses of the knitting machines and investigates how rigid objects can be expressed through the flexible structure.

Spatial and temporal patterns of dissolved organic matter (DOM) were characterized using a combination of spectroluorometric measurements and multivariate analysis techniques. The study was conducted over a four-year (2012-2016) period in multiple watersheds located in the Gulf-Atlantic Coastal Plain Physiographic region of the southeast USA as well as in the Indo-Gangetic Plain of India. Surface water samples were collected from five major lakes in the Mississippi, an estuarine region in the southeastern Louisiana, and from the coastal region in the eastern Mississippi Sound in the USA, and a large river (Ganges River) in India. Absorption and fluorescence measurements were performed to generate absorption spectra and excitation-emission matrices (EEMs). Using parallel factor analyses (PARAFAC), EEM models were developed to characterize the biogeochemistry of DOM in three studies in this project. Principal component analysis and regression analyses of DOM data indicated that the northern Mississippi lakes were majorly influenced by agricultural land use, estuarine region was affected by natural DOM export from forests and wetlands, while the coastal waters were affected by a mix of anthropogenic and natural inputs of DOM. Spatial analyses indicated that DOM derived from watershed with increased wetland coverage was humic and aromatic while the DOM derived from agricultural watersheds was bioavailable. Temporal patterns of DOM in the estuary indicated the influence of hydrologic conditions and summer temperatures, and revealed strong seasonality in DOM evolution in the watershed. During high discharge periods (spring), aromatic and humic DOM was exported from the watershed while strong photochemical degradation during summer resulted bioavailable DOM. Comparison between two river systems, a highly urbanized large river and a small pristine river, indicated the influence of anthropogenic inputs of DOM in the large river system. DOM was bioavailable during summer due to anthropogenic activities in the large river system while it varied with hydrological connectivity in a small river system during summer and winter. In conclusion, this study has improved my understandings of the DOM properties, which are critical for a comprehensive assessment of biogeochemical processes undergoing in important water bodies on which our society is heavily dependent upon.

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No description available.

In The Pearl Button, Patricio Guzman explores the role water played in shaping how the Selk’nam inhabited the coasts of the Tierra del Fuego in Patagonia through “cosmovisions,’ sequences that extend beyond human perception, even as they link the habitation of indigenous peoples to subsequent colonial and political projects. Guzman’s “cosmovisual aesthetic” warrants dissection in the form of a video essay because of its complicated interplay between editing and shot distance, which establishes a critical bioregionalism that acknowledges the unique qualities of place, here the Tierra del Fuego, as well as the forces of globalization that threaten it. Guzman’s cosmovisual aesthetic ranges from extreme close-ups to reveal minute details in objects to aerial shots that articulate the shapes of coasts and even to telescopic shots depicting planets and nebulae. He works with archival photography and the superimposition of images/sounds in order to create a pluriverse of peoples and environments, which moves beyond human audiovisual and temporal perception. In doing so, The Pearl Button links the ways in which the Selk’nam inhabited Chile, depending on its waters, to the ocean as the source of the colonial project of Spain and site of political murders under the later dictatorship of Augusto Pinochet. Guzman’s cinematic elaboration of Indigenous worldviews resonates with contemporary Chilean philosophers Humberto Maturana, Francisco Varela, and Ricardo Rozzi. From cybernetics to ecological philosophy, this video essay weaves the insights of these Chilean philosophers with Guzman’s cosomovisions in order to highlight the complex ecological insights at the intersection of Indigenous thought and film form. In particular, it extends Rozzi’s practical model of Field Environmental Philosophy to communicating ecological philosophy through media.

The Church of Jesus Christ of Latter-day Saints has always possessed a vigorous concept of the value of education for its youth. Programs of religious instruction have encouraged the young people to further their understanding of religious concepts. In July, 1953, all of the Church educational institutions, except those in the islands of the Pacific, were combined into one organization and named The Unified Church School System. As of January 1, 1965 the Pacific Board of Education, which directed the Church schools in the Pacific Islands, was also incorporated into the aforementioned mother unit. One important department of continual research in this system is curriculum development. The development of teacher manuals for the instructors is a never-ending process. New manuals are needed as educational understanding progresses. New methods of presentation are under experimentation with the hope that the youth will more readily accept the religious instruction and put it into vital application in their lives. The purpose of this particular field project is to develop such a course of study for the teachers in one particular segment of this educational system.The Church Schools of the Pacific teach a class of religion each year in their junior and senior high schools, sometimes referred to as "Church Colleges." This necessitates the use of six different gospel subjects. They are generally arranged in this order: seventh grade: Book of Mormon; eighth grade, New Testament; ninth grade, Church History; tenth grade, Old Testament; eleventh grade, Modern Scripture; and in the twelfth grade, a special leadership and church service training program. The Church schools in the Pacific have had the use of the courses of study developed by the seminary program, a sister department in the school system for released time and non-released time junior and senior high school students. The first four courses mentioned are used quite successfully, with some adaptation, but a need has developed for a course for the eleventh graders in Modern L. D. S. Scripture on a par with those developed by the seminary department. It is the work of this field project to develop such an outline, field test it a year, then print it after evaluation as a course of study. The final draft printed for use in the schools of the Pacific would also be presented as partial fulfillment of the master's degree by the writer to the graduate department of religion at Brigham Young University.

The purpose of this study is to compare all the major printings of the texts of "The Book of Abraham" and the "Writings of Joseph Smith," both presently contained in "The Pearl of Great Price", to note the various changes in the texts and to evaluate the significance of those changes.