Academic literature on the topic 'Theses – Botany'
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Journal articles on the topic "Theses – Botany"
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Copetti, Camila, and Thaís Scotti Do Canto-Dorow. "Botany Teaching: An Overview of Academic Research in Brazil from 2002 to 2017." Acta Scientiae 21, no. 3 (2019): 155–69. http://dx.doi.org/10.17648/acta.scientiae.v21iss3id4679.
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The enchantment by Botany teaching represents not an ordinary feeling among students, and even Biology teachers, at every educational level. Researches throughout the Botany teaching area point to a fragmented, decontextualized, quite theoretical and unattractive process. Therefore, in recent years, Botany has changed from a beloved science into a neglected science because of the botanical blindness that has been established in the general population. Thus, the present work aims to present a panorama of the academic researches about Botany teaching in Brazil. It was carried out of theses, dissertations, and articles published from 2002 to 2017. This period was intentionally selected as it fits the establishment of the Guidelines Curriculum for Biological Sciences courses. In parallel, the pursuit of researches on Botany teaching in other countries was also carried out, to verify the international scenario. The investigations were developed in CAPES, IBICT, and SCIELO portals, based on previously defined descriptors. The results, published in Brazil and in other countries, point out the lack of information and a valorization crisis of the scientific knowledge in the process of Botany teaching, both in basic and higher education. This finding gains strength especially when we check the publications of the Biological Sciences - Licentiate courses. These should present deep concerns with the process of teaching to teach, as the teaching roots are similar to the way we receive and comprehend it, which seems the reason Botany teaching ends up being relegated when compared to other areas of knowledge.
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Maroyi, Alfred. "Albizia Adianthifolia: Botany, Medicinal Uses, Phytochemistry, and Pharmacological Properties." Scientific World Journal 2018 (September 20, 2018): 1–18. http://dx.doi.org/10.1155/2018/7463584.
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The bark, leaves, and roots ofAlbizia adianthifoliaare highly sought after in tropical Africa as herbal medicines. Therefore, the aim of this study was to review the botany, medicinal uses, phytochemistry, and pharmacological properties ofA. adianthifoliaso as to provide baseline data required for evaluating the therapeutic potential of the species. Information on the botanical profile, medicinal uses, phytochemistry, and pharmacological properties ofA. adianthifoliawas undertaken using databases such as ScienceDirect, SciFinder, Pubmed, Google Scholar, Medline, SCOPUS, EThOS, ProQuest, OATD, and Open-thesis. Preelectronic literature search of conference papers, scientific articles, books, book chapters, dissertations, and theses was carried out at the University library. Literature search revealed thatA. adianthifoliais used as purgative and herbal medicine for diabetes, eye problems, gastrointestinal problems, haemorrhoids, headache, neurodegenerative disorders, reproductive problems in women, respiratory problems, wounds and pain, skin diseases, sexually transmitted infections, and ethnoveterinary medicine. Phytochemical compounds identified from the species include apocarotenoids, chalcone, dipeptide, elliptosides, essential oils, fatty acids, flavonoids, histamine, imidazolyl carboxylic acid, prosapogenins, steroids, triterpene saponins, and triterpenoids. Pharmacological studies revealed thatA. adianthifoliaextracts and compounds have acetylcholinesterase enzyme inhibitory, anthelmintic, antiamoebic, antibacterial, antimycobacterial, anti-sexually transmitted infections, antifungal, anti-inflammatory, antioxidant, anxiolytic, and antidepressant, cognitive-enhancing, haemolytic, hypoglycemic and antihyperglycemic, immunomodulatory, and cytotoxicity activities. Detailed studies on the pharmacokinetics, in vivo,and clinical research involving compounds isolated fromA. adianthifoliaand extracts of the species are required.
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Banateppanvar, Koteppa, B. S. Biradar, and B. U. Kannappanavar. "Citation analysis of doctoral theses in botany submitted to Kuvempu University, India: a case study." Collection Building 32, no. 1 (2013): 12–21. http://dx.doi.org/10.1108/01604951311295058.
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Shan, Ming-Qiu, Jing Shang, and An-Wei Ding. "Platycladus orientalis Leaves: A Systemic Review on Botany, Phytochemistry and Pharmacology." American Journal of Chinese Medicine 42, no. 03 (2014): 523–42. http://dx.doi.org/10.1142/s0192415x14500347.
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Platycladus orientalis leaves (Cebaiye) have been used for thousands of years as traditional Chinese medicine (TCM). According to the theory of TCM, they are categorized as a blood-cooling and hematostatic herb. In clinical practice, they were usually prescribed with heat-clearing herbs to reinforce the efficacy of hemostasis. The review provides the up-to-date information from 1980 to present that is available on the botany, processing research, phytochemistry, pharmacology and toxicology of the leaves. The information is collected from scientific journals, books, theses and reports via library and electronic search (Google Scholar, Pubmed and CNKI). Through literature reports, we can find that the leaves show a wide spectrum of pharmacological activities, such as anti-inflammatory, antioxidant, antimicrobial, disinsection, anticancer, diuretic, hair growth-promoting, neuroprotective and antifibrotic activities. Diterpene and flavonoids would be active constituents in P. orientalis leaves. Many studies have provided evidence for various traditional uses. However, there is a great need for additional studies to elucidate the mechanism of blood-cooling and hematostatic activity of the leaves. Therefore, the present review on the botany, traditional uses, phytochemistry and toxicity has provided preliminary information for further studies of this herb.
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Maroyi, Alfred. "EUCLEA CRISPA: REVIEW OF ITS BOTANY, ETHNOMEDICINAL USES, AND PHARMACOLOGICAL PROPERTIES." Asian Journal of Pharmaceutical and Clinical Research 11, no. 10 (2018): 5. http://dx.doi.org/10.22159/ajpcr.2018.v11i10.25146.
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Euclea crispa is widely used as herbal medicine in southern Africa. This study was aimed at reviewing the botany, ethnomedicinal uses, and validated pharmacological properties of E. crispa. The literature search for information on ethnomedicinal uses and pharmacological activities of E. crispa was undertaken using databases such as web of science, BMC, science direct, elsevier, scopus, PubMed, and scielo. Other relevant literature sources included books, book chapters, websites, theses, conference papers, and other scientific publications. The extensive literature survey revealed that the bark, fruits, leaves, and roots of E. crispa are commonly used as herbal medicines for wounds, constipation, cough, stomach disorders, epilepsy, rheumatism, and diabetes. Pharmacological studies on E. crispa indicate that the species has amyloid β-peptide lowering effects, antibacterial, antidiarrheal, antifungal, and cell membrane disruption activities. E. crispa should be subjected to further scientific evaluations aimed at elucidating its chemical, pharmacological, and toxicological properties. Such detailed research should also include experimental animal studies, randomized clinical trials, and target-organ toxicity studies involving E. crispa extracts and its derivatives.
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Oliver, E. G. H. "E. A. C. L. E. (Ted) Scheipe (1924-1985) — a biography." Bothalia 16, no. 1 (1986): 97–109. http://dx.doi.org/10.4102/abc.v16i1.1082.
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Prof. E.A.C.L.E. Scheipe was born in Durban on 27 July 1924 and died in Cape Town on 12 October 1985. He studied at the University of Natal and at Oxford, England. He was awarded an M.Sc. (S. Afr.) for a thesis on the ecology of the Natal Drakensberg and a D. Phil. (Oxon.) for a thesis on the ecology of bryophytes. For a brief period he was Curator of the Fielding Herbarium, Oxford. In 1953 he was appointed Lecturer in Botany at the University of Cape Town, until in 1973 he was awarded a full professorship (ad hominem) and the title of Director of the Bolus Herbarium. Here he established a school of taxonomy and promoted 22 theses. His main fields of research were the taxonomy and phytogeography of Pteridophyta (especially African groups) and of Orchidaceae.He has 112 publications to his credit and collected over 7 000 numbers in various regions of Africa, in Europe and the Himalayas. He was a keen gardener and was active in several societies promoting horticulture, orchidology and nature conservation. He was a member of several scientific committees and was repeatedly honoured for his work.Three children were born from his marriage to Sybella Gray, also a botanist.
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Maroyi, Alfred. "DICOMA ANOMALA SOND.: A REVIEW OF ITS BOTANY, ETHNOMEDICINE, PHYTOCHEMISTRY AND PHARMACOLOGY." Asian Journal of Pharmaceutical and Clinical Research 11, no. 6 (2018): 70. http://dx.doi.org/10.22159/ajpcr.2018.v11i6.25538.
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Dicoma anomala is used as herbal medicine to treat and manage fever, coughs, colds, sore throats, abdominal pain, diarrhea, dysentery, constipation, intestinal worms, and sexually transmitted infections in tropical Africa. The aim of this study was to summarize the research that has been done on the ethnomedicinal uses, phytochemistry, and pharmacological properties of D. anomala in tropical Africa. The literature search for information on ethnomedicinal uses and pharmacological activities of D. anomala was undertaken using databases such as Web of Science, Scopus, Google Scholar, Science Direct, BioMed Central, PubMed, and Springer link. Other relevant literature sources included books, book chapters, websites, theses, conference papers, and other scientific publications. This study showed that D. anomala is used as herbal medicine in 57.1% of the countries in tropical Africa where it is indigenous. The species is used to treat 66 and five human and animal diseases, respectively. Several classes of secondary metabolites including acetylenic compounds, diterpene, flavonoids, phenols, phytosterols, saponins, sesquiterpenes, tannins and triterpenes have been isolated from D. anomala. Different aqueous and organic extracts of D. anomala exhibited anthelmintic, anticancer, antihyperglycemic, anti-inflammatory, antimicrobial, antioxidant, antiplasmodial, and hepatoprotective activities. The documented information on the botany, ethnomedicinal uses, phytochemistry, and pharmacological properties of D. anomala provide baseline data required for further ethnopharmacological studies on the species.
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Garg, K. C., and Mamta Duggal. "A bibliometric study of Ph D theses accepted by Bangalore University in disciplines of zoology, botany and physics during 1969–2015." Library Herald 56, no. 3 (2018): 318. http://dx.doi.org/10.5958/0976-2469.2018.00030.1.
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Haritha, Ch, D. Ramya, R. Naveen, S. V. Prasanna, and P. Salomi. "A COMPREHENSIVE REVIEW ON BERGENIA LIGULATA (PAASHANBHEDA) AND ITS ROLE IN THE TREATMENT OF KIDNEY STONE FORMATION." International Journal of Research in Ayurveda and Pharmacy 12, no. 4 (2021): 94–99. http://dx.doi.org/10.7897/2277-4343.1204113.
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Bergenia ligulata, a member of the saxifragaceae family, is a well-known Ayurvedic medicine Paashanbheda. Bergenia ligulata is a highly regarded medicinal herb and one of the most well-known examples of controversial drugs in Indian medicine, commonly referred to as "Paashanbheda." This plant is well-known for its ability to dissolve kidney stones. Bergenia comes in three varieties: B. ligulata, B. ciliata and B. stracheyi. Bergenin is the species' key chemical constituent. Many secondary metabolites belonging to coumarins, flavonoids, benzenoids, lactone, fructose, tannins, phenols, and sterols have been discovered in phytochemical studies. Anti-urolithic, antiviral, free radical scavenging, anti-diabetic, hepatoprotective, diuretic, antipyretic, anti-oxaluria, antitumor, antibacterial, antifungal, anti-inflammatory, anti-implantation and cardio-protective activities have been observed in crude extracts and isolated compounds from B. ligulata. Bergenin, (+) afzelechin, (+) catechin and -sitosterol were discovered in the plant's phytochemistry. Many pharmacological activities of plants have been studied, including antipyretic, anti-diabetic, anti-inflammatory, antitussive, antiurolithic and antimalarial. The aim of this review is to present the most current knowledge on botany, Pharmacognosy, conventional uses, phytochemistry, pharmacopoeial requirements, pharmacology of B. ligulata, as well as the biological activities of Bergenin (active constituent from Bergenia ligulata). It covers the information collected from scientific journals, books, theses and reports via a library and electronic search (Google Scholar and PubMed).
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Phumthum, Methee, and Henrik Balslev. "Using ICPC-2 Standard to Identify Thai Zingiberaceae of Pharmacological Interest." Plants 9, no. 7 (2020): 906. http://dx.doi.org/10.3390/plants9070906.
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The Economic Botany Data Collection Standard (EBDCS) is a widely used standard among ethnobotanists. However, this standard classifies ethnomedicinal uses into categories based on local peoples’ perception. It is difficult to apply in pharmacological research. The International Classification of Primary Care (ICPC), now updated to ICPC-2, is more related to medical terms, but is rarely used among ethnobotanists. This study aims to apply the ICPC-2 to classify metadata of the ethnomedicinal uses of Zingiberaceae plants in Thailand, in order to identify important medicinal taxa for future research. Data on the ethnomedicinal uses of Thai gingers were collected from 62 theses, journal articles, scientific reports and a book, published between 1990 and 2019. Scientific plant names were updated using The World Checklist of Vascular Plants (WCVP) website. Informant Consensus Factor (ICF) was used to identify the medicinal issues commonly treated with gingers, and the Cultural Importance Index (CI) was used to identify species that might have pharmacological potential. We found records of 76 ginger species with ethnomedicinal uses, and together they had 771 use reports. The gingers were commonly used for treatments related to digestive system conditions, particularly abdominal pain and flatulence. Gingers remain exceedingly important in Thai ethnomedicine, with a high number of useful species. They are used to treat a variety of health conditions, but most commonly such ones that are related to the digestive system. Apart from the popular studied ginger, Curcuma longa, we identified a number of other useful gingers in Thailand.
Dissertations / Theses on the topic "Theses – Botany"
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Mahmood, Hajara. "Conversion of Traditional Observation-Based Botany Labs to Investigative Inquiry Learning." TopSCHOLAR®, 2008. http://digitalcommons.wku.edu/theses/21.
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“Tell me and I forget, show me and I remember, involve me and I understand.” - Chinese Proverb. Involvement in learning implies possessing skills and attitudes that permit students to seek resolutions to questions and issues while constructing new knowledge.
Low enrollment in Plant Biology and Diversity and upper level plant science courses has been noticed at Western Kentucky University. In addition, graduating students performed below the national average on the senior assessment examination in the area of botany content knowledge offered by WKU’s Biology Department. This may be due to the fact that observation-based botany has been taught in a traditional way for biology majors at our university for many years. Traditional teaching methods include viewing prepared slides of plant sections, viewing live and herbarium specimens, and memorization of botanical terminology and illustrations.
The goal of this study is to convert these existing traditional laboratories to investigative inquiry exercises without compromising the material covered by bringing observation-based labs into the twenty-first century.
Various teaching strategies including inquiry, problem-based, case-based, and hands-on learning methods were implemented. Each exercise was reshaped around a central question or theme. These changes were expected to increase student learning and retention levels.
Traditional teaching methods were used with the control group, while contemporary teaching strategies were used with the experimental set of students. Traditional assessments and anonymous surveys were statistically analyzed. The results of my analyses suggest that the experimental students were more challenged, interested, intellectually stimulated and less overwhelmed with contemporary teaching strategies and overall had higher learning retention demonstrated by their performance on assessments.
Moreover, I predicted that an investigative approach will encourage larger numbers of students to take this restricted elective sophomore-level course for biology majors and further their study in plant biology.
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Thomas, Adrian Peter. "Calcutta Botanic Garden : knowledge formation and the expectations of botany in a colonial context, 1833-1914." Thesis, King's College London (University of London), 2016. https://kclpure.kcl.ac.uk/portal/en/theses/calcutta-botanic-garden(aaa00d1d-17a2-47dc-be76-a51ee6cf5be2).html.
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Calcutta Botanic Garden was founded in 1786 to acclimatise economic plants, but it quickly became the main institutional base for scientific botany in colonial India. However, it had to make a new start in 1833 after the Garden superintendent, Nathaniel Wallich, distributed its herbarium to botanists in Europe. The thesis shows how the revival of the scientific project to investigate and catalogue the south Asian flora was the main priority for Wallich’s successors, but depended on successful negotiation with the government. The central theme of the thesis is the tension between scientists, intent on their research, and sponsors, who need to demonstrate practical outcomes. It breaks new ground by focussing on how these issues were debated and resolved within a particular colonial scientific institution. It argues that the Garden was able to attract the resources it needed for its scientific work by responding appropriately to government pressures: although its achievements in economic botany were limited, it successfully highlighted them, regularly citing the introduction of tea and cinchona; it reinforced its case by managing its site in ways that reassured the government. The thesis also adds to our understanding of centre-periphery relationships. It argues that the Garden’s role as an important nodal point in the global botanic network was key to achieving its objectives. It shows how the Garden was strengthened by its mutually supportive relationship with Kew Gardens, based on the close bonds that botanists formed with each other. The thesis concludes by showing how, despite the Garden’s achievements, the government gradually lost faith in the ability of botany to contribute to economic progress in India; in the twentieth century it increasingly turned to more specialist disciplines and institutions. The thesis therefore suggests that further studies of scientific institutions would enhance our understanding of how science continued to support and validate imperial rule.
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McGlinn, Daniel J. "Spatial and temporal scaling of species composition at the Tallgrass Prairie Preserve, Oklahoma implications for theory and conversation /." Click HERE to connect, 2009. http://digital.library.okstate.edu/etd/McGlinn_okstate_0664D_10364.pdf.
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Starnes, John Howard. "Effects of Management and Population Size on Genetic Diversity of Eggert's Sunflower (HELIANTHUS EGGERTII; ASTERACEAE)." TopSCHOLAR®, 2004. http://digitalcommons.wku.edu/theses/234.
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Helianthus eggertii (Asteraceae) is a federally threatened sunflower species that typically grows between open woods and barrens. This species has both sexual and asexual modes of reproduction, which can influence the amount of genetic diversity present within and among populations. Maintaining genetic diversity is one of the primary objectives in managing threatened species or populations. Fire and population size may influence genetic diversity. Two Inter-Simple Sequence Repeat Markers (873 and MAO) were used to characterize many important genetic parameters of 17 populations in 2003 and four populations in 2004. This information was used to assess the effectiveness of different conservation management strategies.
The main objectives of this project were to determine whether:
1) larger populations of Helianthus eggertii have a higher genetic diversity within populations than smaller populations
2) fire or other management strategies influence genetic diversity of populations
3) sexually derived progeny of H. eggertii have greater genetic diversity than mixed reproduction in parent populations assuming some degree of clonal reproduction.
This study found that there is higher mean genetic diversity in larger populations, though not significant. Genetic diversity showed no difference in populations that are frequently burned than in populations that are not burned. However, there tends to be an increase in genetic diversity in some populations immediately after a fire event. The seed population studied had a higher genetic diversity. Genetic diversity is high at both Mammoth Cave National Park (.5246) and Arnold Engineering and Development Center(.4555). The high genetic diversity observed suggests that while clones may exist in a population, seedling establishment is actively putting new genetically diverse individuals in a population. These results show that the current management strategies being used are suitable for protecting this species.
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Van, der Merwe Alison M. (Alison Mary). "A biosytematic [i.e. biosystematic] study of the seven minor genera of the Hyacinthaceae." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52618.
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Thesis (DPhil)--Stellenbosch University, 2002.<br>ENGLISH ABSTRACT: A biosytematic revision of the seven minor genera of the Hyacinthaceae, including
twenty-two species, was undertaken. Muller-Doblies & Muller-Doblies (1997)
considered these seven genera (Amphisiphon Barker, Androsiphon Schltr., Daubenya
Lindl., Massonia Thunb. ex Houtt., Neobakeria SChItL, Polyxena Kunth and Whiteheadia
Harv.) together with the genus Eucomis L'Herit. to form the subtribe Massoniinae of the
tribe Massonieae. Previous revisions of the group were based only on morphological
characters (Jessop 1976; Muller-Doblies & Muller-Doblies 1997).
The subtribe Massoniinae is characterised by the large variety of floral forms exhibited
by the different species in the group. In the past this has led to the establishment of many
monotypic genera for species thought to have unique floral structures. Morphological,
leaf anatomical, palynological, geographical and molecular data were studied in order to
delimit the taxa and determine the phylogenetic relationships within the group. This
showed that most of the unique floral structures are probably only adaptations to
pollination strategies and all except one of the monotypic genera are now placed in the
genus Daubenya. In the genus Massonia there is a great deal of variation in leaf
morphology and this resulted in the establishment of many invalid species, now mostly
reduced to synonymy.
A new species was described, several name changes made and several species were
reduced to synonymy.<br>AFRIKAANSE OPSOMMING: 'n Biosistematiese hersiening van die sewe kleiner genera van die Hyacinthaceae,
insluitende twee-en-twintig spesies, is onderneem. Muller-Doblies & Muller-Doblies
(1997) sluit hierdie sewe genera (Amphisphon Barker, Androsiphon Schltr., Daubenya
Lindl., Massonia Thunb. ex Houtt., Neobakeria Schltr., Polyxena Kunth and Whiteheadia
Harv.) saam met die genus Eucomis L'Herit. in die subtribus Massoniinae van die tribus
Massonieae in. Vorige hersienings van die groep was meestal net op morfologiese
kenmerke gebaseer (Jessop 1976; Muller-Doblies & Muller-Doblies 1997).
Die subtribus Massoniinae word gekenmerk deur die groot variasie in blomstrukture wat
by die verskillende spesies in die groep voorkom. In die verlede het dit gelei tot die
beskrywing van verskeie monotipiese genera gegrond op wat geblyk het, unieke
blomstrukture te wees. Morfologiese, blaar anatomiese, palinologiese, geografiese en
molekulere data is bestudeer om die verskillende taksons af te baken en terselfdertyd die
filogenetiese verwantskappe binne die groep te bepaal. Dit het aangetoon dat die unieke
blomkenmerke eerder aanpassings aan bestuiwings-strategiee is en dat al hierdie
monotipiese genera, behalwe een tot die genus Daubenya behoort. In die genus
Massonia is daar baie variasie in blaarmorfologie en dit het veroorsaak dat 'n groot aantal
spesies beskryf is, waarvan baie nou as sinonieme beskou word.
Een nuwe spesies is beskryf, verskeie naarnsveranderinge is gemaak, en 'n aantal van die
spesies is tot sinonieme verander.
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Abun, Woldetinsae Azieb. "A palynological study of selected American members of Oxalis L." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53284.
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Thesis (MSc)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: Oxalis L. has two centres of diversity, one in South-Central America and the other in
southern Africa. Previous palynological studies of southern Africa Oxalis revealed
four main pollen types, namely rugulate-reticulate, micro-rugulate-spinate, reticulate
and supra-areolate (Dreyer 1996). The reticulate pollen type is further divided into 15
subtypes, out of which five have a monotypic status. The supra-areolate pollen type is
divided into four subtypes based on exine structure. The reticulate pollen type is the
most common pollen type within the South African members of Oxalis. The three
remaining main pollen types display more complex exine structures and are therefore
considered more derived than the reticulate pollen type.
The present study assessed the pollen of 50 American Oxalis species with three main
objectives: 1. To observe pollen type variations among American members of Oxalis,
2. To compare pollen types from the two centres of diversity, and 3. To assess which
centre of diversity house the palynologically more advanced species of Oxalis.
Two main pollen types are recorded from the present study, namely reticulate and
verrucate pollen types. The reticulate pollen type could be further divided into 11
subtypes. Out of the 11 subtypes observed, nine also occur among South African
members of Oxalis, while two types are only observed in the American members of
Oxalis. The verrucate pollen type is found in a single American taxon and displays a
more complex exine structure than the reticulate pollen type. In this study the reticulate
pollen type proved to be the most common pollen type among the American members
of Oxalis. The South African members of Oxalis display more complex pollen types
than the American members of the genus.<br>AFRIKAANSE OPSOMMING: Oxalis L. het twee diversiteitsentrums, een in Suid-Sentraal Amerika en die ander in
suidelike Afrika. Palinologiese studies van suidelike Afrika Oxalis-taksa toon vier
hoofstuifmeeltipes, naamlik gerimpel-netvormig, fyn-gerimpel-stekelrig, netvormig en
supra-areolêr (Dreyer 1996). Die netvormige stuifmeeltipe word verder verdeel in 15
subtipes. Vyfvan hierdie tipes het 'n monotipiese status. Die supra-areolêre
stuifmeeltipe word verdeel in vier subtipes gebaseer op eksienstruktuur. Die netvormige
stuifmeeltipe is die mees algemene stuifmeeltipe aanwesig in die Suid Afrikaanse
Oxalis-taksa. Die drie oorblywende hoofstuifmeeltipes toon 'n meer komplekse
eksienstruktuur en word as meer gevorderd as die netvormig stuilmeeltipe beskou.
In die huidige studie is stuifmeelkorrels van 50 Amerikaanse Oxalis spesies bestudeer
met drie doelstellings in gedagte: 1. Om die variasie in die stuifmeeltipes van die
Amerikaanse spesies van Oxalis te bestudeer, 2. Om die stuifmeeltipes van die twee
diversiteitsentrurns te vergelyk, en 3. Om vas te stel watter diversiteitsentrum het
palinologies die meer gevorderde spesies van die genus Oxalis.
In die huidige studie is twee hoofstuifmeeltipes onderskei, naamlik netvormige en
verrukate stuifmeeltipes. Die netvormige stuifmeeltipe is verder verdeel in 11 subtipes.
Van die 11 subtipes wat onderskei is, kom nege tipes ook in die Suid Afrikaanse taksa
van Oxalis voor, terwyl twee stuifmeeltipes slegs by die Amerikaanse soorte van Oxalis
voorkom. Die verrukate stuifmeeltipe is slegs in 'n enkele Amerikaanse spesie gevind.
Hierdie tipe toon 'n meer komplekse eksienstruktuur as die netvormige stuifmeeltipe.
In die huidige studie het die netvormige stuifmeeltipe gebleik die mees algemene
stuifmeeltipe in die Amerikaanse Oxalis-spesies te wees. Die Suid Afrikaanse taksa van
Oxalis toon meer komplekse stuifmeeltipes as die Amerikaanse taksa.
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Boussiengui-Boussiengui, Gino. "Remobilization of sucrose from the culm during germination of sugarcane setts." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/3116.
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Thesis (MSc (Botany and Zoology))--University of Stellenbosch, 2005.<br>The main substrate use during shoot establishment from the lateral bud of sugarcane setts
and enzymes involved in sucrose metabolism were investigated in the shoots and the
internodes acting as source of carbohydrates. Radiolabelling studies were conducted to
investigate the metabolism of sucrose and glucose during shoot establishment. The
internode’s total dry mass over the 21-day of shoot establishment period was reduced by
25% and 30% in plants incubated in dark/light and total darkness, respectively.
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Callis, Kristine Lee. "The History of Plant Use in Laos: Analysis of European Accounts of Plant Use for Primarily Religious and Medicinal Purposes." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-07012005-111631/.
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A Review of manuscripts written by European explorers and colonists affords the opportunity to develop a clearer understanding both of types of plants employed and their significance in religion and medicine during the 16th to 19th centuries. This paper is a distillation of accounts by thirteen European explorers, written between 1545 until 1861, about Laos and the Lao people in Siam. All of the references to plants and plant use have been extracted for an analysis of which plants European explorers viewed being used traditionally in Laos during this time period and information on how these plants were used and collected. Many of the plants described in the texts were medicinal in nature and some have been examined for modern pharmaceutical use. These pharmaceutical studies have substantiated the effectiveness of historical medicinal plant use. The texts also describe plants that were used in religious ceremonies and that continue to play an important role in Lao culture. Future comparative analysis of these early records with modern day observations of plant use should prove productive in formulating assessments of Traditional Environmental Knowledge loss and the impact of this loss on daily life. Understanding the plants that are important to native Lao in the past can lead to better methods of conservation in the future.
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Inman, Faith Marie. "USING ARTIFICIAL CANOPY GAPS TO RESTORE AVIAN HABITAT IN TROPICAL TIMBER PLANTATIONS." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-07142005-155017/.
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The potential for plantations to catalyze forest regeneration on highly degraded land and the need to research management methods to increase biodiversity within plantations have been widely recognized. Our study investigated the effects of creating artificial canopy gaps by girdling exotic timber trees in plantations on the germination, growth, and survival of native tree species that may be important food plants for the Puerto Rican parrot. We found that seedling growth increased significantly in gaps; there were no differences in survival or germination between gap and closed plots. Percentage cover of grasses, shrubs, and vines increased but did not prevent tree seedlings from growing significantly more in gaps. Leaf litter removal had no effect on germination, growth, or survival. Both local and landscape level diversity is predicted to increase in gaps if large saplings present in the understory replace the girdled timber trees, but plantations will still be dominated by exotics and timber species. Our results suggest that restoration of native forest diversity in plantations will require continued management to remove exotic species and promote growth of tree species with high wildlife habitat value.
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Lees, Britta. "Characterization and community analysis of three Carolina Bays in Bladen County, North Carolina." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-08122004-155502/.
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Carolina Bays are unique elliptical depressional wetlands that are abundant in the Atlantic Coastal Plain, particularly in North Carolina. A large percentage of these bays have been ditched, drained, logged, or otherwise disturbed by humans in the past 200 years. Currently, Carolina Bay restoration provides a means for mitigating wetlands lost to development. The purpose of this study was to characterize compositional variation of vegetation relative to gradients of environmental conditions in three Carolina Bays in order to provide reference data for restoring impacted bays. Within three unaltered Carolina Bays, soil sampling, water table monitoring, and vegetation assessments were conducted. Four community types were identified: pond pine woodland, non-riverine swamp forest, high pocosin, and bay forest. Distributions of these community types were strongly correlated to depth of organic material and associated soil properties and hydrologic regimes. Pond pine woodland dominated mineral soils; both pond pine woodland and nonriverine swamp forest were found on histic and shallow organic soils; both high pocosin and bay forest were found on deep organic soils. Examination of the data included simple averaging, single factor analyses of variance, Fisher?s protected least significant differences, chi-square tests of independence, cluster analyses, and ordination procedures. The application of this material was intended for a North Carolina Department of Transportation Carolina Bay mitigation project and future Carolina Bay restoration projects in this region.
Books on the topic "Theses – Botany"
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Spaans, Ronny. Dangerous Drugs. Amsterdam University Press, 2020. http://dx.doi.org/10.5117/9789462982543.
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In the 17th century, the Dutch Republic was the centre of the world trade in exotic drugs and spices. They were sought after both as medicines, and as luxury objects for the bourgeois class, giving rise to a medical and moral anxiety in the Republic. This ambivalent view on exotic drugs is the theme of the poetry of Joannes Six van Chandelier (1620-1695). Six, who himself ran the drug shop ‘The Gilded Unicorn’ in Amsterdam, addresses a number of exotic medicines in his poems, such as musk, incense, the miracle drug theriac, Egyptian mumia, and even the blood of Charles I of England. In Dangerous Drugs, these texts are studied for the first time. The study shows how Six, through a process of self-presentation as a sober and restrained merchant, but also as a penitent sinner, thirsting for God’s grace, links early modern drug abuse to different desires, such as lust, avarice, pride and curiosity. The book shows also how an early modern debate on exotic drugs contributed to an important shift in early modern natural science, from a drug lore based on mythical and fabulous concepts, to a botany based on observation and systematic examination.
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E, Magill Robert, ed. Index of mosses: A catalog of the names and citations for new taxa, combinations, and names for mosses published during the years 1990 through 1992 with citations of previously published basionyms and replaced names together with a bibliography of the publications in which these nova appeared. Missouri Botanical Garden, 1994.
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Crosby, Marshall R. Index of mosses: A catalog of the names and citations for new taxa, combinations, and names for mosses published during the years 1996 through 1998, inclusive, with citations of previously published basionyms and replaced names together with a bibliography of the publications in which these nova appeared. Missouri Botanical Garden, 2000.
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Crosby, Marshall R. Index of mosses: A catalog of the names and citations for new taxa, combinations, and names for mosses published during the years 1999 through 2001, inclusive, with citations of previously published basionyms and replaced names together with a bibliography of the publications in which these nova appeared. Missouri Botanical Garden, 2004.
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Crosby, Marshall R. Index of mosses: A catalog of the names and citations for new taxa, combinations, and names for mosses published during the years 1993 through 1995, inclusive, with citations of previously published basionyms and replaced names together with a bibliography of the publications in which these nova appeared. Missouri Botanical Garden, 1997.
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Fisher, Gwen M. Investigation of the potential antibacterial properties of Aloe vera gel. 1991.
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Schotz, Alfred R. Vegetation and floristics of oak openings in western New York State: A thesis in biology. 1997.
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Athens, J. Stephen. Archaeology of the Eastern Caroline Islands, Micronesia. Edited by Ethan E. Cochrane and Terry L. Hunt. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199925070.013.013.
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A great deal of archaeology has been conducted in the Eastern Caroline Islands during the last thirty-five years. This chapter provides an overview of these investigations and accomplishments. The discussion is framed in terms of the ethnographic present (what is known about traditional societies) to contextualize the archaeological findings. The focus is primarily on the two high islands of Pohnpei and Kosrae, though other islands/archipelagos are touched upon as relevant. Major themes are initial settlement of the islands, cultural florescence as represented by megalithic architecture, and the so-called breadfruit revolution. Review of these topics touches upon many aspects of prehistoric studies, including the paleoenvironment, linguistics, artifacts, subsistence, sourcing of basalt, oral history, botany, and others.
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Sitnik, K. M., and V. S. Galuzinska. Botanical Notebooks or Twelve Trips to the Plant World. PH “Akademperiodyka”, 2001. http://dx.doi.org/10.15407/akademperiodyka.001.310.
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This popular science book reveals to the reader the amazing secrets of the ancient and good science of botany, the ways of its development. The fates and biographies of botanists, their discussions that lasted for centuries, their travels and journeys provide answers to many questions of the existence of the contemporary. There is no sphere in human life today where plants are not involved. The book is intended for engineers and a students, workers and doctors, etc., because its theme is man in the plant world.
Book chapters on the topic "Theses – Botany"
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Benfield, Richard W. "Future directions." In New directions in garden tourism. CABI, 2021. http://dx.doi.org/10.1079/9781789241761.0156.
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Abstract In this chapter the future of garden tourism is examined. Botanic gardens have multiple roles but principally education, environmental, and recreation, and it is under these three roles that garden tourism's future is evaluated. Case studies are presented of (1) the National Botanic Garden of Wales as a floral resource for pollinating insects; and (2) the high school botany teaching program of the Fairchild Tropical Botanic Garden in Coral Gables, Florida, USA.
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Benfield, Richard W. "Future directions." In New directions in garden tourism. CABI, 2021. http://dx.doi.org/10.1079/9781789241761.0011.
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Abstract In this chapter the future of garden tourism is examined. Botanic gardens have multiple roles but principally education, environmental, and recreation, and it is under these three roles that garden tourism's future is evaluated. Case studies are presented of (1) the National Botanic Garden of Wales as a floral resource for pollinating insects; and (2) the high school botany teaching program of the Fairchild Tropical Botanic Garden in Coral Gables, Florida, USA.
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Oßwald, Wolfgang, Julia Koehl, Ingrid Heiser, Jan Nechwatal, and Frank Fleischmann. "New Insights in the Genus Phytophthora and Current Diseases These Pathogens Cause in Their Ecosystem." In Progress in Botany. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18819-0_18.
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Kelly, Grahame J., and Erwin Latzko. "Photosynthesis. Carbon Metabolism: On Regulation at the Cellular Level and at the Whole Plant Level, and Some Considerations Concerning the Interactions of These Regulatory Events with the Increasing Level of Atmospheric C02." In Progress in Botany. Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76293-2_7.
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Cohan, Frederick M. "Genomes reveal the cohesiveness of bacterial species taxa and provide a path towards describing all of bacterial diversity." In Trends in the systematics of bacteria and fungi. CABI, 2021. http://dx.doi.org/10.1079/9781789244984.0282.
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Abstract This book chapter argues that bacterial systematists of the mid-20th century fortuitously created a species-level systematics that actually fits an important universal theory of speciation by discussing taxonomy would allow us to infer the important characteristics of any unknown organism once we classify it to species. It turns out, unexpectedly, that bacterial species taxa share a species-like property with the species taxa of zoology and botany. While recombination within species taxa of all these groups fails to prevent diversification within species, recombination nevertheless appears to act universally as a force of cohesion within species taxa. That is, recurrent recombination within species limits neutral sequence divergence within species taxa of plants, animals, and bacteria; recombination also allows a sharing of generally adaptive genes across a species range. The 95% ANI criterion that demarcates the traditionally defined species taxa of bacteria fortuitously also yields groups of bacteria that are subject to the species-like property of cohesion, where recombination prevents neutral sequence divergence among ecotypes within a species. Use of the ANI criterion, then, not only provides an easily used algorithm for demarcating bacterial species; it also places bacterial demarcation on the same theory-based foundation as the species taxonomy of animals and plants.
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Kloetzer, Laure, Julia Lorke, Joseph Roche, Yaela Golumbic, Silvia Winter, and Aiki Jõgeva. "Learning in Citizen Science." In The Science of Citizen Science. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58278-4_15.
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AbstractCitizen science is a promising field for educational practices and research. However, it is also highly heterogeneous, and learning happens in diverse ways, according to project tasks and participants’ activities. Therefore, we adopt a sociocultural view of learning, in which understanding learning requires a close analysis of the situation created both by the project tasks and the dynamics of engagement of the participants (volunteers, scientists, and others). To tackle the complexity of the field, this chapter maps learning in citizen science into six territories, according to where learning might take place: formal education (schools and universities); out-of-school education (science and nature clubs, summer camps, outdoor education, etc.); local and global communities (neighbourhood associations, activist associations, online communities, etc.); families; museums (science museums, art museums, zoos, and botanic gardens); and online citizen science. For each territory, we present key findings from the literature. The chapter also introduces our six personal journeys into the field of learning and citizen science, displaying their variety and the common lessons, challenges, and opportunities. Finally, we present four key tensions arising from citizen science projects in educational settings and look at training different stakeholders as a strategy to overcome some of these tensions.
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Meeker, Natania, and Antónia Szabari. "Plant Societies and Enlightened Vegetality." In Radical Botany. Fordham University Press, 2019. http://dx.doi.org/10.5422/fordham/9780823286638.003.0003.
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This chapter investigates the emergence, in the form of an enlightened plant, of utopian theories of vegetal sociability in the eighteenth century, at a time that witnesses the proliferation of schemes for botanical classification and physiological inquiries into plant life. These theories both herald and resist the development of classificatory systems and a biopolitics modeled on vegetal life. Authors Ludvig Holberg (1684–1754) and Tiphaigne de la Roche (1722–1774) create new narratives of liberal and rationally-governed societies by peopling them with plants. Yet these utopian visions are not only hopeful, they also bring into view a plant that troubles the very concept of society by existing in a state of utter indifference to need and human desire. Thus these works also make visible the possibility of an alternate conception of modernity in which the plant delivers a powerful critique of enlightenment itself.
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Meeker, Natania, and Antónia Szabari. "The End of the World by Other Means." In Radical Botany. Fordham University Press, 2019. http://dx.doi.org/10.5422/fordham/9780823286638.003.0005.
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The fifth chapter investigates the way in which early avant-garde French cinema takes up the very forms of vegetal sentience and plant-inspired calamity that so terrified Edgar Allan Poe, thereby rewriting the plant once again as an opening onto new worlds. In these films the “inorganic” function of vegetality—as linked to and inspiring new forms of technology and new means of sociability—returns in the visual domain, generating an “electric plant” that retains its utopian dimensions and its power to deprioritize the human. Thus avant-garde vegetal cinema ties the plant once again to a tradition of speculation that extends into the production and creation of new media capable of apprehending and imitating the subtle materiality of vegetal being. The “electric plant” brings to fruition the concept of cinema as a form of pure movement. The French experimental cinema discussed in this chapter reinvents the project of imagining vegetal worlds, this time in cinematic contexts. While filmmakers and theorists Jean Epstein (1897–1953) and Germaine Dulac (1882–1942) turn with excitement toward vegetality, other contemporaneous artists, including Colette (1873–1954), re-inscribe the plant into the domain of ordinary experience and human pathos.
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Meeker, Natania, and Antónia Szabari. "Plant Horror: Love Your Own Pod." In Radical Botany. Fordham University Press, 2019. http://dx.doi.org/10.5422/fordham/9780823286638.003.0006.
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The sixth chapter moves into the world of “plant horror” to explore the ways in which the plant becomes a figure for both cinema itself and for life under global capitalism, inspiring fear and desire all at once. The B movies examined in this chapter posit vegetality as the experience of all beings under capitalism. They visualize the dark side of a global modernity that is vegetal in essence, yet still generates human interest and even fascination. This critique of capitalism is coupled with an attempt to project a view of a purely material reality—that is, the reality of the plant on film. Such a projection represents not just a horrifying loss of human authenticity, but a pleasurable cinematic experience that foreshadows a new materialist approach to the interpenetration of bodies. This chapter presents an analysis of the two film versions of Invasion of the Body Snatchers (appearing in 1956 and 1978, respectively) to show how these films foreground vegetal alterity and challenge the basic premises of realism. Long interpreted as promoting paranoia, plant horror can instead introduce us to a world which does not recognize humans as individuals but nonetheless allows them to become affectively involved with it.
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Higgins, Richard, and Richard Higgins. "Forest Lessons." In Thoreau and the Language of Trees. University of California Press, 2017. http://dx.doi.org/10.1525/california/9780520294042.003.0009.
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Botany appealed to the wordsmith as well as the naturalist in Thoreau. “How copious and precise the botanical language!” he enthused in his journal in 1851. He used its precise lexicon to describe trees. The broad flat brown buds on Mr. Cheney’s elm, containing twenty or thirty yellowish-green threads, surmounted with little brownish mulberry cups, which contain the stamens and the two styles—these are just expanding or blossoming now. The flat imbricated buds, which open their scales both ways, have had a rich look for some weeks past. Why so few elms so advanced, so rich now? Are the staminiferous and pistilliferous flowers ever on different trees?...
Conference papers on the topic "Theses – Botany"
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Griffin, Alidair A., Barbara Doyle Prestwich, and Eoin P. Lettice. "UCC Open Arboretum Project: Trees as a teaching and outreach tool for environmental and plant education." In Learning Connections 2019: Spaces, People, Practice. University College Cork||National Forum for the Enhancement of Teaching and Learning in Higher Education, 2019. http://dx.doi.org/10.33178/lc2019.25.
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The University College Cork (UCC) Open Arboretum Project aims to re-imagine the original purpose of the University’s tree collection – as a teaching tool. The arboretum represents a unique on-campus learning space which has been under-utilised for teaching in recent times. The arboretum has the capacity to engage students, staff and visitors in a tangible way with important global issues (e.g. the climate emergency and biodiversity loss). It is also an opportunity to combat ‘plant blindness’, i.e. the ambivalence shown to plants in our environment compared to often charismatic animal species. Wandersee and Schussler (1999) coined the term “plant blindness” to describe the preference for animals rather than plants that they saw in their own biology students. Knapp (2019) has argued that, in fact, humans are less ‘plant blind’ and more ‘everything-but-vertebrates-blind’ with school curricula and television programming over-emphasising the role of vertebrates at the expense of other groups of organisms. Botanic gardens and arboreta have long been used for educational purposes. Sellman and Bogner (2012) have shown that learning about climate change in a botanic garden led to a significant shortterm and long-term knowledge gain for high-school students compared to students who learned in a classroom setting. There is also evidence that learning outside as part of a science curriculum results in higher levels of overall motivation in the students and a greater feeling of competency (Dettweiler et al., 2017). The trees in the UCC collection, like other urban trees also provide a range of benefits outside of the educational sphere. Large, mature trees, with well-developed crowns and large leaf surface area have the capacity to store more carbon than smaller trees. They provide shade as well as food and habitats for animal species as well providing ‘symbolic, religious and historic’ value in public common spaces. Such benefits have recently been summarised by Cavender and Donnolly (2019) and aligned with Sustainable Development Goal 11, Sustainable Cities and Communities by Turner-Skoff and Cavender (2019). A stakeholder survey has been conducted to evaluate how the tree collection is currently used and a tour of the most significant trees in the collection has been developed. The tour encourages participants to explore the benefits of plants through many lenses including recreation, medicine and commemoration. The open arboretum project brings learning beyond the classroom and acts as an entry point for learning in a variety of disciplines, not least plant science and environmental education generally.
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Bosch Reig, Ignacio, Luis Bosch Roig, Valeria Marcenac, and Nuria Salvador Luján. "Linear parks understood as vertebration instruments of the city." In 24th ISUF 2017 - City and Territory in the Globalization Age. Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/isuf2017.2017.6136.
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This research raises as thesis the idea that Linear Park is an urban instrument capable of vertebrate the city and, consequently, of regenerate it. To this end, ten parks strategically located in big cities such as Rio de Janeiro, London, Paris, Madrid, Barcelona, or in medium or small cities such as Valencia, Castellón or Figueres, have been analyzed. Of this analysis we have deduced some characteristics that are considered key in the linear and transversal vertebration of the city, such as: - Green axis-corridor approach - Sequence of events with integration of public buildings - Continuity derived from the union of different areas - Promotion of active leisure activities, individual or collective: sports, cultural, .... - Capability of relation and regeneration of ecosystems: forest, meadow, orchard, nurseries, water, city, .... - Capability to restore environment, with reduction in CO2, in noise pollution, ... - Establish relations between the city and the territory with definition of natural parks - Contribute to prevent thermal inversion in the city - Establish a beginning and an end as recognizable elements in city. - Confrontation of opposites: static or dynamic; soft (green) or hard (pavement); unitary or fragmentary, cartesian or organic, ... The parks thus understood can be organized in diverse typologies, such us: classic order; in net; upholstery-continuos map; linear order with grooves, tapes or bands; landscaper and naturalist; ... .. The work delves into these themes by recognizing tools of interest such as: harmonic relationship; human scale; non-guided tours; sensory experimentation: spaces, sights, aromas, sounds, colorful, ...; unexpected and random; pragmatic and passionate; order within disorder; activation of spaces without hierarchies or apriorisms; flee from monotony; evocations; ... KEY WORDS: linear park, green corridor, city vertebrador, urban regeneration, sensorial experimentation, harmonious relationship, ... REFERENCES: Referred to the following urban parks: Paseo de Copacabana, 1979 Burle Max; La Vilette project 1975, León Krier; La Vilette 1981-87, Bernard Tschumi; Turia Park, 1981, Ricardo Bofill; Botanic Garden, Barcelona, 2002, Carlos Ferrater; Thames Barrier Park, London, 2000, Signes Group; Garden of the senses, Castellón, Del Rey-Magro; Park of the Manzanares, Madrid, Burgos-Garrido; Les Aigües Park, Figueres, Oliac-Batle; Parque Cabecera, Valencia, De Miguel-Corell-Muñoz
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Lin, Jian, and Robert G. Parker. "Natural Frequency Veering Patterns of Planetary Gears Under Design Parameter Variation." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/ptg-14438.
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Abstract Noise and vibration reduction is a critical concern in planetary gear applications. During the design process, system parameters are varied to evaluate alternative design choices, avoid resonances, optimize load distribution, and reduce weight. It is important to characterize the effects of parameter variations on the natural frequencies and vibration modes for effective vibration tuning. In planetary gear dynamic models (Figure 1), the key design parameters include the mesh stiffness, support/bearing stiffness, component mass, and moment of inertia. Some plots of natural frequencies versus planetary gear parameters are presented by Cunliffe et al. (1974), Botman (1976), Kahraman (1994), and Saada and Velex (1995). Lin and Parker (1999a) analytically characterized the unique, highly-structured properties of planetary gear natural frequency spectra and vibration modes. They also derived simple, closed-form expressions for the sensitivities of natural frequencies and vibration modes to these parameters (Lin and Parker, 1999b). The natural frequency plots in the above literature show natural frequency veering phenomena where two eigenvalue loci approach each other as a parameter is varied but then abruptly veer away like two similar charges repelling (Figure 2a). The phenomenon has been extensively studied (Leissa, 1974; Perkins and Mote, 1986; Pierre, 1988; Chen and Ginsberg, 1992; Happawana et al., 1998). The vibration modes of the veering eigenvalues are strongly coupled and undergo dramatic changes in the veering neighborhood. Eigenvalue veering is also related to mode localization that can occur when disorder is introduced into nominally symmetric systems like turbine blades, space antennae, multi-span beams and other structures (Pierre, 1988). In the case of especially sharp veering, it is sometimes difficult to distinguish between intersection and veering just by observing eigenvalue plots. Curve veering/crossing complexity obstructs the tracing of eigenvalue loci under parameter changes. Also, when multiple curves veer or intersect close together (Figure 3), strong modal coupling (and associated operating condition response changes) occurs that is not identifiable from frequency loci plots. The objective of this work is to analytically characterize the rules of eigenvalue veering in planetary gear vibration. The special veering patterns derived here help to trace natural frequencies and examine impacts of design parameters on vibration. These veering patterns, combined with the unique modal properties (Lin and Parker, 1999a) and the eigensensitivies analysis (Lin and Parker, 1999b), provide designers considerable insight into planetary gear free vibration.
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Cunha, Madalena, and Nuno Campos. "STUDENT MENTOR'S IDEAL FEATURES: PEER CHOICE." In International Conference on Education and New Developments. inScience Press, 2021. http://dx.doi.org/10.36315/2021end011.
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Introduction: A student mentor is someone who shares his or her knowledge with a less experienced colleague in order to help the other developing his or her full academic potential by providing him/ her with the right guidance and support during his learning, social and academic integration processes. Objective: To assess the features higher education students consider to be the most effective characteristics their Student Peer Mentor should possess. Method: A descriptive-exploratory study, with a cross-sectional focus, involving a sample of 306 higher education health students, with a mean age of 21.15 (± 3,540) years. 81.7% of the participants are female. Data collection was achieved using Cunha’s Ideal Mentor Faces Scale (2017) with images adapted from Botas, Gabriel & Welling, (1997/1998). Results: Results show that 61.8% of the students surveyed would like to be student mentors and that most participants (54.2%) look at their ideal mentor as someone who possesses positive features, while 12,1% of the participants would choose for their ideal mentor a student whose features might suggest the existence of a risk profile. Finally, and paradoxically, 33.7% of them would choose a student mentor who tends to exhibit certain negative features. Positive characteristics were granted the highest mean values. Those values ranged between Satisfied (68%), Tranquil (78.1%); Optimistic (85%); Confident (88.2%) and Interested (87.9%). Conclusions: Results suggest that higher education students value the existence of student mentors with positive features/characteristics and realize that their existence is of great pedagogical importance. Therefore, there is now a greater need to ask higher education students to participate in Mentoring programs implemented with the support of second or third year Student Mentors who, on a voluntary basis, using their experiences and academic experiences can supervise incoming first year students (Mentee Students) in order to facilitate their integration and their adaptation to the different dimensions (pedagogical, scientific, social and any other) of the academic environment.