Relevant bibliographies by topics / Yams

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Yams'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 June 2025

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Journal articles on the topic "Yams"

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Siqueira, MVBM. "Yam: a neglected and underutilized crop in Brazil." Horticultura Brasileira 29, no. 1 (2011): 16–20. http://dx.doi.org/10.1590/s0102-05362011000100003.

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In Brazil current studies and investments on yams are incipient. Similarly, the literature in recent decades lacks adequate information on this group of plants. The existing literature, on its turn, requires more than ever to be revised and organized. Yams have joined the so-called "neglected" group of crops for several reasons, but particularly because they are associated with poor and traditional communities. Many vegetables introduced in Brazil during the colonization period have adapted to different cropping systems, yams being an excellent example. This diversity resulted very widespread, yet poorly recognized in the country. In turn, the gardens using traditional farming systems continue to maintain and enhance yam local varieties. Studies from other countries, with an emphasis on characterization and genetic breeding, brought to light an urgent need for Brazil to invest in yams as a food rich in carbohydrates, even to the point of alterations in food public policy. Reversal of the yam's current stigma is both a challenge to the scientific community and to the population as a whole. This paper aims to raise pertinent questions about Dioscorea species, an important key group for many communities in tropical countries, yet still unrecognized as so in Brazil.
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Ackermann, Klaus. "Utilisation of wild growing yams as supplementary nutrition and its impact on the dry forest ecosystem in north-western Madagascar." Schweizerische Zeitschrift fur Forstwesen 155, no. 3-4 (2004): 80–88. http://dx.doi.org/10.3188/szf.2004.0080.

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Wild growing yams (Dioscorea spp.) are an important supplementary food in Madagascar, especially during periods of rice shortage in the rainy season. Yams grow in dry forests and there is a particularly high occurrence of yam tubers in recently burned, open secondary forest formations. The study found that the uncontrolled harvest of yams can contribute to the degradation of dry forests due to the high quantity of wild yams harvested by the local population and the widespread practice of intentionally burning forests to increase yams production.
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Mauti, Godfrey O., Peter F. Kasigwa, Joan J. E. Munissi, and Justus M. Onguso. "Antioviposition and Reduction of Callosobruchus chinensis Pic. 1902 (Coleoptera: Bruchidae) Emergence on Phaseolus vulgaris by Dioscorea sansibarensis Powder and Its Chemical Composition." Psyche: A Journal of Entomology 2020 (November 11, 2020): 1–6. http://dx.doi.org/10.1155/2020/3298479.

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Callosobruchus chinensis causes damage to the Phaseolus vulgaris seeds. Traditionally, Dioscorea sansibarensis serves as a medicinal plant. Naturally, D. sansibarensis has toxins that protect against herbivores and the surrounding invasive plants in its natural habitat. Phytochemical analysis by thin-layer chromatography (TLC) and laboratory experiments was carried out to determine the activity of D. sansibarensis leaves, bulbils, and yams powders on antioviposition and inhibition of the F1 emergence of C. chinensis. Bioassay data were subjected to nonparametric (Kolmogorov–Smirnov) statistical analysis and a generalized linear model at P ≤ 0.05 . Statistically, the powders had an antioviposition activity of 34.3% (R2 = 0.343). A recommendable activity on antioviposition was displayed by the yams powder; treatment by 0.8 g of yams powder had a Wald Chi-Square value of 1.291, P = 0.26 . Inhibition of F1 emergence was significantly attained by the yams powder; the treatment by 0.6 g of yams powder had a Wald Chi-Square value of 7.72, P = 0.01 . Statistically, the bulbils powder displayed low antioviposition and inhibition of F1 emergence. Observations on the TLC exposed compounds with similar Rf values; saponin with an Rf value of 0.72 was portrayed in the leaves, bulbils, and yams. A terpenoid and a flavonoid with Rf values of 0.37 and 0.71, respectively, were observed in bulbils and yams but absent in leaves. A terpenoid with an Rf value of 0.49 was visualized in leaves and bulbils but not in the yams powder. The study concluded that the D. sansibarensis yams and leaves powders are viable for application by the farmers in the protection of stored legumes against attack by C. chinensis. However, there may be other diverse interests in other storage insects and other methods of phytochemical analysis that have not been investigated.
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Butcher, James. "Candied Yams." Cream City Review 42, no. 2 (2018): 51. http://dx.doi.org/10.1353/ccr.2018.0060.

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Wumbei, Abukari, Judith Kania Asibi Bawa, Mamudu Abunga Akudugu, and Pieter Spanoghe. "Absence of Effects of Herbicides Use on Yam Rots: A Case Study in Wulensi, Ghana." Agriculture 9, no. 5 (2019): 95. http://dx.doi.org/10.3390/agriculture9050095.

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Yam farmers in Ghana have, over the years, used herbicides for weed control, particularly glyphosate. Although this has been helpful to them, there are complaints and concerns, among the yam farmers and a section of the public, that the yam tuber rots easily under the use of herbicides. This study, therefore, was set up at the field level to investigate the possibility of herbicides use causing yam rot. Two yam varieties, “laribako” and “olodo”, were grown under the conditions of chemical weed control (use of glyphosate) and manual weed control in three replicate sites in Wulensi in the Nanumba traditional area of northern Ghana. The study revealed that there was no difference in rots between herbicide treated yams and manually weeded yams, but that there was a difference in rots between “laribako” and “olodo” yam varieties. The results also showed that there was no difference in yield between herbicide treated yams and manually weeded yams. Based on the findings, it can be concluded that, there was no difference in yam rot and yield between herbicides treated and manually weeded yams, but “laribako” was more susceptible to rot than “olodo”.
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Vernier, P., G. C. Orkwor, and A. R. Dossou. "Studies on Yam Domestication and Farmers' Practices in Benin and Nigeria." Outlook on Agriculture 32, no. 1 (2003): 35–41. http://dx.doi.org/10.5367/000000003101294244.

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This paper combines the results of surveys carried out between 1995 and 2001 in Benin and Nigeria on farmers' practices in connection with the domestication of yams (Dioscorea rotundata), which is still an active process in West Africa. In Benin more than 500 yam producers belonging to four major yam-producing ethnic groups (Bariba, Mahi-Fon, Nago and Yom) and nearly 300 farmers in six different states of Nigeria were interviewed. The knowledge of wild yams is still alive even among farmers who have never domesticated yam. In the two countries the techniques described are very similar and the domesticated wild yams belong either to D. abyssinica in the northern part of the studied area (drier savanna zone) or to D. praehensilis in the southern part (humid savanna). The percentage of farmers who are domesticating or have recently domesticated yams varies from 3–14%. The domestication process mainly leads to early maturing cultivars, which are produced in double-harvest systems. The practice of domestication is decreasing, especially in the regions where commercial yam production is well developed.
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Wolff, Simon P. "Yams and poisons." Nature 365, no. 6446 (1993): 580. http://dx.doi.org/10.1038/365580a0.

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CRAUFURD, P. Q., R. J. SUMMERFIELD, R. ASIEDU, and P. V. VARA PRASAD. "DORMANCY IN YAMS." Experimental Agriculture 37, no. 2 (2001): 147–81. http://dx.doi.org/10.1017/s001447970100206x.

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The tubers of yam, principally those of Dioscorea rotundata (white Guinea yam) and D. alata (water or greater yam), are important staple foods and sources of carbohydrate in West Africa. Yams are grown in diverse environments – from the high-rainfall forest zone on the coast to the seasonally arid savannas of West Africa, that is in situations in which the duration and the timing of the onset of the growing season vary appreciably. Dormancy in both underground and aerial tubers of the Dioscoreaceae is an important adaptive mechanism that helps to maintain organoleptic quality during storage and also ensures that tubers germinate at the start of the growing season. Plant breeders are especially keen to manipulate the duration of the dormant period in order to synchronize growth periods and, therefore, to produce more than one generation per year. The control of tuber dormancy, however, is poorly understood. This review examines critically those factors that affect tuber initiation, dormancy and sprouting, and makes recommendations for future priorities in research.
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Mirkin, G. "Estrogen in yams." JAMA: The Journal of the American Medical Association 265, no. 7 (1991): 912b—912. http://dx.doi.org/10.1001/jama.265.7.912b.

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Mignouna, H. D., M. M. Abang, R. Asiedu, and R. Geeta. "Yam (Dioscorea) Husbandry: Cultivating Yams in the Field or Greenhouse." Cold Spring Harbor Protocols 2009, no. 11 (2009): pdb.prot5324. http://dx.doi.org/10.1101/pdb.prot5324.

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Dissertations / Theses on the topic "Yams"

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Salda, Violeta B. "Ethnobotany and food uses of Philippine highland yams (Dioscorea)." Thesis, Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2132637X.

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Jayaratne, Dehiwala Liyanagle. "Detection and differentiation of potyviruses affecting yams." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266999.

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Baimey, Hugues Kossi. "Scutellonema bradys as a pathogen of yam in Benin." Thesis, Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-10252006-164955.

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Tang, Yina. "Comparative study on the morphology, chemistry, metabolism and anti-myocardial ischemia activity of three medicinal species of dioscorea." HKBU Institutional Repository, 2015. https://repository.hkbu.edu.hk/etd_oa/166.

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As folk medicines used in China for decades, Dioscorea nipponica Makino (DN, 穿龍薯蕷), D. panthaica Prain et Burkill (DP, 黃山藥), and D. zingiberensis C. H. Wright (DZ, 盾葉薯蕷) are regarded as having more or less similar traditional therapeutic actions, such as regulating qi, relieving pain, and dispersing swelling. It is noteworthy that, of the 49 species of the genus Dioscorea (薯蕷屬) distributed in China, only these three have been successfully developed as effective single-herb medicines for treating cardiovascular diseases by the modern pharmaceutical industry. Usually considered as the bioactive and major constituents, various steroidal saponins have been discovered from these herbs. In order to provide scientific data for the rational use of DN, DP and DZ, this present study focused on comparing these three herbs through the following four-pronged approach: morphology, chemistry, metabolism and anti-myocardial ischemia activity. The morphological study aimed to distinguish the rhizomes of DN, DP and DZ by macroscopic and microscopic observation. Comprehensive microscopic techniques, including common light microscopy, fluorescence microscopy and polarized light microscopy were successfully applied to fulfill this purpose. What’s more, it is the first research to observe characteristics of transections of crude drugs under polarized lighting for the purpose of authentication. Polarized light has been found to provide a number of unique characteristics. The results indicate that starch granules, vascular bundles and other significant tissue features can be used to authenticate these three herbs. The chemical study aimed to develop a reliable and effective protocol for comparing the chemical composition of DN, DP and DZ. The qualitative results by UPLC-QTOF-MS indicated that generally, DN and DP have similar chemical composition, but both are distinct from DZ. However, the aglycone, diosgenin, was the main component of all acid hydrolyzed DN, DP and DZ. As diosgenin has been reported for the anti-myocardial ischemia activity, we hypothesized that diosgenin could be one of the bioactive sapogenin related to the anti-myocardial ischemia (MI) activity of these three herbs. Then, to further validate the similarity of DN and DP, the major constituents, including six glycosides and one aglycone, contained in DN and DP were further quantified. The chemical composition of all DN and DP samples studied exhibited a high level of global similarity based on comparisons of chromatographic fingerprint profiles and the contents of determined components using fingerprint similarity evaluation, test of significance and principal component analysis. This chemical similarity validates the common application of DN and DP in the pharmaceutical industry as anti-MI herbal drugs. The metabolism study aimed to a) compare the metabolic profiles of total saponins (TS) from DN, DP and DZ (abbreviated as DNTS, DPTS and DZTS, respectively), which are considered to be their bioactive components, and b) to compare the changes in sustained levels of metabolites from rat biosamples. TS from each of the three species, and four individual saponins, namely protodioscin, pseudoprotodioscin, dioscin and diosgenin, were given to rats by oral administration. Chemical profiles of the rats’ plasma, urine and feces were monitored 1-36 h. A UPLC-QTOF-MS based method was performed to identify the absorbed constituents and their metabolic products in rat biosamples (i.e., blood, urine, and feces); the ratio of peak area of metabolites to that of internal standard was calculated and plotted versus time to characterize the sustained levels of metabolites in biosamples. The results indicated that formation of diosgenin by desugarization was the main pathway by which steroidal glycosides were metabolized. Generally, the metabolic profiles of DN and DP were shown to be quite similar, but different from that of DZ. However, some particular similarities were found among these three total saponins. Diosgenin, as one of the main metabolites commonly found in plasma and feces (excluding urine), from all groups receiving different total saponins, as well as individual saponins; this is likely to be one of the bioactive constituents playing an essential role in cardioprotective efficacy. In addition, these furostane-type saponins and spirostane-type saponin (including diosgenin) in these three total saponins showed two changing patterns, suggesting that the therapeutic effect of these Dioscorea saponins is achieved through a complex, multi-step process over time. Thus, these similarities described above constitute evidence supporting similarity in efficacy of these three herbs from the perspective of metabolism. The anti-myocardial ischemia activity study aimed to further investigate the underlying mechanisms with respect to anti-oxidative stress activity by which these Dioscorea spp. prevent MI, and to compare the therapeutic effect of total saponins from these three species on myocardial antioxidant levels and myocardium histology. The rats experienced myocardial ischemia induced by isoprenaline (ISO) injection; the test solutions (DNTS, DPTS, DZTS) were administered either after the ISO injection, or both before and after. Compared with the model group (ISO injection only), TS groups exhibited significantly reduced activities of serum CK, LDH and AST (P < 0.01), lowered level of MDA (P < 0.01 or P < 0.05), and increased activities of SOD, CAT, GPx and total antioxidant capacity (T-AOC) (P < 0.01 or P < 0.05). Heart tissues from TS groups (administered either after the ISO injection, or both before and after) revealed less severe histological damage than the model group. The findings of the present study provide evidence that DNTS, DPTS and DZTS can protect the myocardium against ischemic insult. Furthermore, the protective effect can be attributed to the increase of myocardial antioxidant levels and decrease of lipid peroxidation formation. Although the chemical compositions of DNTS and DPTS were similar, and distinct from DZTS, in general, the cardioprotective efficacy of these three Dioscorea TS for rat MI were closely comparable based on LDH, CK, AST, SOD, GPx, CAT, T-AOC and MDA levels, as well as on myocardial histology, thereby explaining the similarity in their clinical efficacy as anti-MI drugs. In conclusion, these findings in the present study constitute evidence that DN, DP and DZ all can be used as starting material for anti-MI drugs in the pharmaceutical industry.
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Wong, Kam-lok, and 黃金樂. "Chemical and biological characterization of a steroidogenic protein from Dioscorea opposita Thunb." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hdl.handle.net/10722/211560.

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Menopause is the period during which the level of estrogen secreted by the ovaries gradually declines and patients of menopausal syndrome may experience osteoporosis, cognitive decline, hot flush, mood disorder, night sweat, depression, nervous tension and insomnia. The report published by the World Health Organization in 1990 stated that the total population of postmenopausal women in the world was 476 million. By 2030, the predicted population will reach 1200 million. The current way to relieve menopausal syndrome is hormone replacement therapy (HRT) which restores the endogenous estrogen level by administration of supplementary exogenous estrogen or estrogen plus progestin. However, various studies showed that HRT might increase the incidence of breast cancer and ovarian cancer. There is a potential risk of using HRT for menopausal syndrome. The novel protein DO isolated in this study could be a potential alternative of HRT for the treatment of menopausal syndrome. DO isolated from Chinese yam Dioscorea opposite Thunb. had adistinctive N-terminal sequence Gly-Ile-Gly-Lys-Ile-Thr-Thr- Tyr-Trp-Gly-Gln-Tyr-Ser-Asp-Glu-Pro-Ser-Leu-Thr-Glu-Ala, indicating that DO might be a novel protein.DO was an acid stable and thermal stable protein. As determined by electro-chemiluminescence immunoassay (ECLIA) detection, DO could stimulate estradiol biosynthesis in rat granulosa cells in vitro as well as inducing both estradiol and progesterone secretion in female aging Sprague Darley (SD)-rat model in vivo. From the results of real-time PCR and Western blot, the possible mechanism might be through up-regulating the expression of ovarian follicle stimulating hormone receptor(FSHR)and aromatase. DO also exerted a beneficial effect on the cognitive function through elevating the translational level of brain derived neurotrophic factor (BDNF)and TrkB gp 145 receptor in the prefrontal cortex of female aging SD-rat model. Though further pharmacological studies are required, the results in this study suggested that DO could be a safer potential alternative for HRT in the treatment of menopausal syndrome with beneficial effects on hormone levels and cognitive function.
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Chinese Medicine
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Master of Philosophy
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Caddick, Lizabeth Rebecca. "Systematics of dioscoreales." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312537.

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Turaki, Aliyu Abdullahi. "Characterisation of badnavirus sequences in West African yams (Dioscorea spp.)." Thesis, University of Greenwich, 2014. http://gala.gre.ac.uk/13829/.

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Yam (Dioscorea spp.) is an important staple food crop in Sub-Saharan Africa and is vegetatively-propagated. This had led to the accumulation of viruses decreasing yam production and hindering international movement of selected germplasm. This study was to determine the prevalence and diversity of yam badnaviruses, as well as determine if badnavirus sequences are also integrated in the genomes of West African yam breeding lines. DNAs were extracted from Nigerian yam leaf samples (177 breeding lines, 78 landraces), using an optimised CTAB-extraction method and then screened using degenerate badnavirus-specific PCR primers targeting a 579 bp RT-RNaseH region. All 255 yam samples (100%) tested badnavirus PCR-positive. Denaturation gradient gel electrophoresis (DGGE) analysis of these PCR products revealed 24 discrete bands in total. Sequence analysis of the bands confirmed they were typical of the genus Badnavirus and a nucleotide diversity of 1-37% in this partial RT-RNaseH region representative nine of badnavirus species group. To determine which sequences were from episomal infections, rolling circle amplification (RCA) was performed on samples, and three complete genome sequences of yam badnaviruses were amplified, cloned and sequenced. Two of these full viral genome sequences (7258 and 7538 bp) of D. rotundata origin represent new species in the genus Badnavirus and the third (7529 bp) from D. alata represented an isolate of Dioscorea bacilliform AL virus. The three new genomes shared nucleotide identities of 68.3-70.5% and demonstrated a typical size and organisation of yam badnaviruses. PCR-based assays were developed for the detection of the five yam badnavirus genomes, and for the detection of three putative badnavirus species groups (K08, K09 and U12) that contain integrated sequences. Southern hybridisation results using individual DGGE band partial RT-RNaseH sequences (NGb4_Dr, NGb5_Dr and NGb6_Dr), supported integration of badnavirus sequences in genomes of D. rotundata breeding lines. Fluorescent in situ hybridisation (FISH) results using badnavirus complete and partial cloned genome sequences as probes were inconclusive for the yam samples tested. The consequences of the integrated and episomal badnavirus sequences for yam improvement programmes in West Africa are discussed.
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Sukal, Amit Chand. "Molecular characterisation and diagnosis of badnaviruses infecting yams in the South Pacific." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/122927/1/Amit%20Chand_Sukal_Thesis.pdf.

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Yams are an important food source grown throughout the Pacific but the international movement of the crop is restricted due to a lack of understanding of the viruses infecting these plants. This study focused on identifying and characterising badnaviruses infecting yams and the subsequent development of sensitive and reliable diagnostic tests. These tests can be used in virus-screening programs to enable the safe international movement of virus-free yam germplasm thus contributing to food and nutritional security of Pacific Island Countries.
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Kwoseh, Charles Kodia. "Identification of resistance to major nematode pests of yams (Dioscorea spp.) in West Africa." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340023.

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Ferreira, Almecina Balbino [UNESP]. "Sistemas de cultivo do cará dioscorea spp. por pequenos agricultores da baixada Cuiabana – MT." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/93493.

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Made available in DSpace on 2014-06-11T19:26:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-02-18Bitstream added on 2014-06-13T20:55:01Z : No. of bitstreams: 1 ferreira_ab_me_botfca.pdf: 1827601 bytes, checksum: b017d5489f44eb1c042dcabf9e93e729 (MD5)
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As dioscoreáceas constituem uma importante fonte alimentar e estão distribuídas nas regiões tropicais, subtropicais e temperadas de todo mundo. O gênero Dioscorea, ao qual pertence a maioria das espécies cultivadas e silvestres da família, engloba espécies tropicais originárias da África, Ásia e América. O objetivo do trabalho foi realizar um levantamento das variedades de cará (Dioscorea spp.) cultivadas pelos agricultores com o intuito de verificar as espécies mantidas por eles e suas diversidades, nomes populares das variedades e sobre o sistema produtivo da cultura como: preparo das túberas sementes, manejo da cultura, preparo do solo, plantio, tratos culturais e comercialização. Para o início da pesquisa de campo, foi usada a técnica de amostragem do tipo “bola de neve”, que consistiu em conversar com alguns agricultores e vendedores dos mercados de hortaliças da região para a localização dos principais agricultores que cultivam o cará e suas indicações subsequentes. Durante a pesquisa de campo, foram encontrados 48 agricultores que cultivam diversas culturas e também plantam o cará, com seu respectivos nomes populares para o gênero. Foram encontradas três espécies: Dioscorea alata, D. trifida e D. bulbifera. O preparo do solo é feito de forma rudimentar e o cultivo do cará é feito no sistema de “roça de toco”. 14% dos agricultores utilizaram algum tipo de implemento agrícola para o preparo do solo. O preparo das “sementes” varia de acordo com cada espécie, sendo que 55% são plantadas partidas e 45% inteiras. A organização e destino da produção acontecem nas comunidades, onde grande parte é destinada à alimentação familiar, e o excedente é para a venda direta para consumidores ou via intermediários
The dioscoreaceas constitute an important source of food and are distributed in tropical, subtropical and temperate all over the world. The genus Dioscorea, whose the most cultivated and wild species of the family belong to, encompassing tropical species originally from Africa, Asia and America. The objective was to survey the varieties of yams grown by farmers in order to verify the species kept by them and their diversity, popular names of the varieties and the crop production system as: preparation of tubers-seeds, crop management, soil preparation, planting, cultivation and marketing. In the field research the sampling snowball, was used, which consisted of talking to some farmers and vegetable sellers in the region for the location of the main farmers who grow yams. During the fieldwork, there were 48 farmers growing different crops and also plant the yams, their respective common names for the genus. Three species were found: Dioscorea alata, D. trifida and D. bulbifera. Soil preparation is done rudimentary and the cultivation of yams is done on a “slash and burn” system. 14% of farmers used some type of agricultural implement for soil tillage. The “seed” preparation varies with each species, 55% are planted using divided portions of the tubers and 45% using entire tubers. The organization of production and destination are done in communities where a large part is devoted to the family diet, and the surplus is for sale delivered directly to consumers or by middle-men
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Books on the topic "Yams"

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Treche, Serge. Potentialités nutritionnelles des ignames (Dioscorea spp.) cultivées au Cameroun. Editions de l'ORSTOM, 1989.

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Adanguidi, Jean. Réseaux, marchés et courtage: La filière igname au Bénin (1990-1997). Lit, 2001.

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Epasinghe, S. Atirēka āhāra bōgayak vasayen dēśīya ala varga nispādanayē pavatina vihavatā saha bādhaka handunāgănīma. Hekṭar Kobbâkaḍuva Gōvi Kaṭayutu Paryēṣaṇa hā Pubhuṇu Kirīmē Āyatanaya, 2014.

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Osagie, Anthony U. The yam tuber in storage. Postharvest Research Unit University of Benin, 1992.

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Bouacou, Raoul. The civilisation of the yam: The yam, an essential part of the indigenous traditional knowledge systems in the Pacific. Secretariat of the Pacific Community/Customary Senate of New Caledonia, 2009.

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Degras, Lucien. The yam: A tropical root crop. Macmillan, 1993.

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René, Coste, ed. The yam. Macmillan, 1993.

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Yamuimo to Amazon yūyō shokubutsu no kanōsei o saguru. Tōkyō Nōgyō Daigaku Shuppankai, 2013.

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Repp, Gloria. A question of yams. Bob Jones University Press, 1992.

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Troughton, Joanna. Anansi and the magic yams. Blackie Children's Books, 1994.

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Book chapters on the topic "Yams"

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Arnau, Gemma, K. Abraham, M. N. Sheela, Hana Chair, Alieu Sartie, and Robert Asiedu. "Yams." In Root and Tuber Crops. Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-92765-7_4.

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Moorthy, S. N., M. S. Sajeev, R. P. K. Ambrose, and R. J. Anish. "Yams." In Tropical tuber starches: structural and functional characteristics. CABI, 2021. http://dx.doi.org/10.1079/9781786394811.0115.

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Abstract This chapter discusses the extraction of starch from different yam (Dioscorea) species. The physiochemical (biochemical property, amylose and amylopectin content), structural (granular morphology, X-ray diffraction pattern, starch crystallinity, and amylose and amylopectin structure), functional (swelling pattern, solubility, viscosity, rheological properties and retrogradation) and thermal properties of yam starches and their digestibility are described.
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Thompson, Anthony Keith, and Ibok Oduro. "Production." In Yams: botany, production and uses. CABI, 2021. http://dx.doi.org/10.1079/9781789249279.0007.

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Rubatzky, Vincent E., and Mas Yamaguchi. "Yams, Dioscorea." In World Vegetables. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6015-9_12.

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Lebot, V. "Yams: agronomy." In Tropical root and tuber crops: cassava, sweet potato, yams and aroids. CABI, 2020. http://dx.doi.org/10.1079/9781789243369.0273.

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Lebot, V. "Yams: developmental physiology." In Tropical root and tuber crops: cassava, sweet potato, yams and aroids. CABI, 2020. http://dx.doi.org/10.1079/9781789243369.0260.

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Reddy, P. Parvatha. "Yams, Dioscorea spp." In Plant Protection in Tropical Root and Tuber Crops. Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2389-4_5.

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Claudius-Cole, Abiodun. "Importance and integrated nematode management of the yam nematode (Scutellonema bradys) in yam cropping systems of West Africa." In Integrated nematode management: state-of-the-art and visions for the future. CABI, 2021. http://dx.doi.org/10.1079/9781789247541.0052.

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Abstract Yam, Dioscorea spp., one of the oldest food crops known to humans, is the fourth most important root and tuber crop globally. It is a tropical plant that provides food and income for the people in the regions where it is grown. Major nematode pests reported on yams include Scutellonema bradys, Meloidogyne spp., Pratylenchus spp. and Rotylenchulus reniformis. This chapter addresses S. bradys, causing dry rot disease of yams in field and storage. When S. bradys infected seed tubers are planted, plant survival is reduced, and the speed of the disease cycle is amplified leading to reduced yield. The economic importance, host range, distribution, damage symptoms, biology and life cycle, interactions with other nematodes and pathogens, recommended integrated nematode management, and management optimization of S. bradys are discussed. Future research requirements and developments are also mentioned.
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Barton, Huw. "Yams: Origins and Development." In Encyclopedia of Global Archaeology. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-30018-0_2193.

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Barton, Huw. "Yams: Origins and Development." In Encyclopedia of Global Archaeology. Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4419-0465-2_2193.

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Conference papers on the topic "Yams"

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Hoong, Angela Lee Siew, Tong Ming Lim, Soo Kar Leow, and Justin Lim Renn Aun. "A study on the use of “Yams” for enterprise knowledge sharing." In 2012 Second International Conference on Digital Information and Communication Technology and it's Applications (DICTAP). IEEE, 2012. http://dx.doi.org/10.1109/dictap.2012.6215348.

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Kyo, Koki, and Mitsuru Hachiya. "A statistical approach of identifying indexes crucial to characterizing Chinese yams in terms of shape." In IntelSys 2013 International Conference on Advances in Intelligent Systems in Bioinformatics, Chem-Informatics, Business Intelligence, Social Media and Cybernetics. WIT Press, 2014. http://dx.doi.org/10.2495/intelsys130041.

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Tabiei, Ala, and Ivelin Ivanov. "Computational Micro-Mechanical Model of Composite and Flexible Woven Fabric With Fiber Reorientation." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/ad-23779.

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Abstract This work presents a computational material model of flexible woven fabric for finite element impact analysis and simulation. The model is implemented in the nonlinear dynamic explicit finite element code LSDYNA. The material model derivation utilizes the micro-mechanical approach and the homogenization technique usually used in composite material models. The model accounts for reorientation of the yarns and the fabric architecture. The behavior of the flexible fabric material is achieved by discounting the shear moduli of the material in free state, which allows the simulation of the trellis mechanism before packing the yams. The material model is implemented into the LSDYNA code as a user defined material subroutine. The developed model and its implementation is validated using an experimental ballistic test on Kevlar® woven fabric. The presented validation shows good agreement between the simulation utilizing the present material model and the experiment.
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Barron, Peter, and Vinny Cahill. "YABS:." In the 5th international conference. ACM Press, 2006. http://dx.doi.org/10.1145/1173706.1173730.

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Bölöni, Ladislau, and Damla Turgut. "YAES." In the 8th ACM international symposium. ACM Press, 2005. http://dx.doi.org/10.1145/1089444.1089473.

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Ríos, María Isabel Hernández, Salvador Sánchez Silva, Edgar Iván Ramírez Díaz, and Natalia Trujillo Monterrosa. "YAMI." In CLIHC '17: 8th Latin American Conference on Human-Computer Interaction. ACM, 2017. http://dx.doi.org/10.1145/3151470.3156643.

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Li, Bin, Yun Q. Shi, and Jiwu Huang. "Steganalysis of YASS." In the 10th ACM workshop. ACM Press, 2008. http://dx.doi.org/10.1145/1411328.1411354.

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Duchateau, Fabien, Remi Coletta, Zohra Bellahsene, and Renée J. Miller. "YAM." In Proceeding of the 18th ACM conference. ACM Press, 2009. http://dx.doi.org/10.1145/1645953.1646311.

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Vinoski, Steve. "A decade of Yaws." In the 10th ACM SIGPLAN workshop. ACM Press, 2011. http://dx.doi.org/10.1145/2034654.2034656.

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Akinola, Akinjide A., S. N. Ezeorah, and E. P. Nwoko. "New model for the rehydration characteristics of white yam at different temperatures." In 21st International Drying Symposium. Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7337.

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A new model describing the variation in the rehydration ratio with rehydration time for yam slices is presented here. Also presented, is a new model for the rehydration kinetics of yam slices. Mass and moisture content rehydration data were collected while rehydrating 3.0 mm thick dehydrated yam slices. Regression analysis established that the mass rehydration data better fitted a two-term exponential equation rather than a second-order polynomial equation. Also, for the rehydration kinetics, the moisture content rehydration data was better fitted to a new empirical model rather than the Weibull, Peleg, and Exponential models. Keywords: Rehydration Ratio Models; Rehydration kinetic models; Yam; Weibull, Peleg, and Exponential models.
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Reports on the topic "Yams"

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Kelly, William G., and Catherine W. Tobias. Using YATS to Recruit for the 21st Century,. Defense Technical Information Center, 1998. http://dx.doi.org/10.21236/ada362180.

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Perry, Shelley, and Jerry Lehnus. The Youth Attitude Tracking Study (YATS) In-Depth Interviews WITH YOUNG WOMEN: a Methodological Overview,. Defense Technical Information Center, 1998. http://dx.doi.org/10.21236/ada362444.

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Alale, Theophilus, Nelson Opoku, and Charles Adarkwah. The Efficacy of Aqueous False Yam (Icacina oliviformis) Tuber Extract Against Cowpea Aphids (Aphis craccivora Koch). Journal of Young Investigators, 2017. http://dx.doi.org/10.22186/jyi.32.3.7-22-24.

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Enhancing the nutrient-rich yam bean (Pachyrhizus spp.) storage roots to improve food quality and availability and sustainability of farming systems in Central and West Africa: final report. International Potato Center, 2016. http://dx.doi.org/10.4160/9789290604747.

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