Дисертації з теми "Feed and Food"
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Chaddick, Justin Garrett. "Sustainable tilapia feed derived from urban food waste." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54468.
Повний текст джерелаBudu, Ben Asare. "Economic feasibility of processing food waste and incorporating processed food waste products in least cost duck feeds." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33067.
Повний текст джерелаThe second part of the thesis was examined using economic and financial analyses for the investment. The basic plant requirements to produce the three processed food waste products were the same, however energy costs were different for the three products. Revenue was generated from tipping fees and the sale of the three processed food waste products. (Abstract shortened by UMI.)
Farhat, Antoine G. "Nutritional evaluation of industrial food wastes in ducks diets." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0006/MQ29689.pdf.
Повний текст джерелаMo, Wing Yin. "Food wastes as feeds incorporated with Chinese herbs and prebiotic fibers on growth and non-specific immunity of grass carp, bighead, mud carp and Nile tilapia." HKBU Institutional Repository, 2014. https://repository.hkbu.edu.hk/etd_oa/91.
Повний текст джерелаDarwish, Randa. "Investigating Chlamydomonas reinhardtii as a functional food and feed ingredient." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/49762/.
Повний текст джерелаVandenbroeck, Emma. "Food: to feed or to profit? : (De)commodification in the food system and Community Supported Agriculture." Thesis, Uppsala universitet, Institutionen för arkeologi och antik historia, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-402182.
Повний текст джерелаTung, Catherine. "Harnessing the Trajectory of Food Transitions to Better Feed the World." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/cmc_theses/966.
Повний текст джерелаJeffrey, Andrea. "The role of Salmonella in animal food." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/32583.
Повний текст джерелаDepartment of Grain Science and Industry
Cassandra Jones
Salmonella contamination in animal food production facilities is a growing concern. The bacteria has been the cause of 40% of pet food recalls in the past 5 years, and there are potential human health implications because pet food is a direct human contact food. A potential method to reduce Salmonella contamination in pet food is through the use of acidifiers and desiccants to destroy and inhibit growth of bacteria. The objective of this thesis was to quantify Salmonella contamination in livestock feed and pet food manufacturing facilities, and propose mitigation measures to mitigate the presence of pathogens in animal food. Therefore, the objective of Experiment 1 was to investigate sources of Salmonella contamination throughout livestock feed (n = 2) and pet food (n = 2) manufacturing facilities on a specific sampling day. Salmonella was present in all four facilities. However, one of the livestock feed manufacturing facilities had more than double the Salmonella-positive locations than all other facilities. This experiment demonstrated that surface type and location should be taken into consideration when controlling Salmonella contamination. In Experiments 2 and 3, the use of a commercial powdered dry acidulant, sodium bisulfate, was studied as a coating of dog kibble to reduce and prevent Salmonella growth over time. The coating reduced Salmonella concentration, and its efficacy was not impacted by altering the bulk density or surface area of the kibble. Experiment 4 was conducted to determine the efficacy of sodium bisulfate added to poultry mash to reduce or prevent Salmonella growth over time. The inclusion of the dry acidulant did not reduce Salmonella concentration; however, storage time reduced Salmonella contamination in poultry feed. In summary, Salmonella contamination exists in manufacturing facilities, but the location and magnitude of contamination differs. Furthermore, sodium bisulfate effectively reduces Salmonella contamination when applied as a pet food coating, but not in poultry feed.
Stroka, Jörg. "Determination of aflatoxins in food and feed with simple and optimised methods." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=963266624.
Повний текст джерелаFinn, Beverley. "The production of food/feed ingredients by selective cultivation of saccharomyces cerevisiae." Thesis, University of Strathclyde, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431829.
Повний текст джерелаYousuf, Zarina. "Development and potential of two novel reporter systems for use in lactic acid bacteria." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326434.
Повний текст джерелаNormand, Luc. "Recycling of agro-industrial food wastes into feed for Pekin duck meat production towards a sustainable agriculture in the Province of Quebec." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0004/MQ29759.pdf.
Повний текст джерелаFrizzell, Caroline Margaret. "An investigation of food and feed based mycotoxins as potential endocrine disrupting contaminants." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676471.
Повний текст джерелаKyriazakis, I. "Growth, feed intake and diet selection in pigs : theory and experiments." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/28387.
Повний текст джерелаde, Vries Tialda. "Let's head to the food store : An analysis of accessibility to food stores in rural and urban Västerbotten." Thesis, Umeå universitet, Institutionen för geografi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187661.
Повний текст джерелаWang, Jian. "Analyses of food and feed compounds using matrix-assisted laser desorption/ionization mass spectrometry." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0013/NQ59690.pdf.
Повний текст джерелаPalestra, Ilaria Maria. "Estimation and achievement of optimal measurement uncertainty form the sampling of food and feed." Thesis, University of Sussex, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488580.
Повний текст джерелаLiu, Chi-Wei. "Hog island agricultural protectionism, food dependency, and impact of the international food regime in Taiwan /." Diss., Online access via UMI:, 2008.
Знайти повний текст джерелаGhalamkari, Zahra. "Improving the Nutritional Quality of Food and Feed by Manipulation of Iron Storage in Plants." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21650.
Повний текст джерелаIron (Fe) ranks fourth in an abundance of elements in the Earth’s crust, but Fe deficiency is a widespread problem in plants and animals because of the insolubility of Fe oxides. Fe deficiency leads to reduce plant productivity and most significantly to enhanced Fe-induced anemia in humans. Fe biofortification has been suggested to be a practical approach for improving the nutritional quality of plants for food or feed. In this work, we have tested new strategies for increasing Fe content in the model plant Arabidopsis. Vacuolar Fe transport genes of the VTL family (VIT1-like) were over-expressed in combination with the newly discovered Fe regulatory protein IMA1 (IronMan1) or the Fe-binding peptide NAS3. Over-expression of each of the five VTL genes (VTL1 – 5) led to an increased Fe content by 2- to 3-fold in Arabidopsis seeds. IMA1 was greatly induced under Fe deficiency. Over-expression of IMA1 resulted in an Fe deficiency response also in Fe-sufficient plants. Fe content was an increase by 3-fold in seed, leaves, roots, and seedlings of Arabidopsis. The expression of Fe uptake and homeostasis genes was greatly induced in over-expressing plants independent of the Fe supply compared to the wild type. Analyses of NAS3 OE plants showed that Fe content in seeds was increased approximately 2-fold compared to WT. In conclusion, we have demonstrated that single over-expression of VTL1, 2, 3, 4 or 5, IMA1 or NAS3 correlated with increased seed Fe. Expression of Fe uptake and homeostasis genes confirmed the increased Fe content in these over-expressing plants. Double over-expression of the VTL genes in combination with IMA1 or NAS3 resulted in no further increase in Fe likely caused by the regulation of the VTL genes by IMA1 expression and the lack of increased nicotianamine in the case of VTL5/NAS3 over-expressing plants. Future research should be dedicated to extending these findings to crop plants.
Giromini, C. "HEALTH-PROMOTING COMPOUNDS IN FOOD AND FEED: AN IN VITRO APPROACH TO STUDY DIETARY BIOACTIVES." Doctoral thesis, Università degli Studi di Milano, 2015. http://hdl.handle.net/2434/338775.
Повний текст джерелаImamoglu, Husniye. "SENSORY AND QUALITY ASSESSMENT OF GRAZING STANDING CORN VERSUS COMMERCIALLY FEED LOT FINISHED BEEF." MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-10302007-165906/.
Повний текст джерелаMiljkovic, Ana. "Production, characterisation and mode of action of some nephrotoxic mycotoxins." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325190.
Повний текст джерелаTravella, Silvia. "Improving and understanding the barley genetic transformation process." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365058.
Повний текст джерелаShrestha, Anuj Raj. "Feed my people food bank project a case study of space planning and costing of warehouse /." Online version, 2009. http://www.uwstout.edu/lib/thesis/2009/2009shresthaa.pdf.
Повний текст джерелаNelson, Laura Ashley. "Dietary macronutrient composition and exogenous neuropeptide Y affect feed intake in brioler chicks." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/48899.
Повний текст джерелаMaster of Science
Yamashita, Lina. "Making Visible the People Who Feed Us| Exploring Student Responses to Multicultural Texts About Food Workers." Thesis, University of California, Davis, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10285172.
Повний текст джерелаThere is growing interest in teaching K-16 students where food comes from and how it is grown, as evidenced by school gardens, farm-to-school programs, majors related to food systems, student farms on college campuses, and campus sustainable food projects. Many of these programs, however, do not necessarily highlight social inequities embedded in food systems or engage with the people who feed us, including slaughterhouse workers and restaurant workers. Moreover, there is currently little documentation and analysis of the few programs that highlight food workers and their experiences. Given the dearth of research on the practice of critical food systems education, I designed and researched a 10-week, seminar-style undergraduate course titled “Making Visible the People Who Feed Us: Labor in the Food System” that I taught over three academic quarters. Using teacher research methodology, this qualitative study explores how three cohorts of 18 students in the course responded to multicultural texts that reflect diverse, marginalized perspectives of food workers, many of whom are people of color, women, and/or undocumented. Following the reflective and reflexive tradition of teacher research, I also reflect on my teaching practices, consider how my biases affected my teaching, and elaborate on tensions that emerged as I taught the course. Data sources included student work, field notes of each class session, post-course and 6-11-month follow-up interviews, and entries in my reflection journal.
Findings from this study indicated a wide range in terms of how students responded to multicultural texts about food workers, depending on students’ prior knowledge and experiences. Some students showed a variety of emotions, from frustration to sadness, or expressed appreciation or respect toward the workers, especially if the workers’ experiences resonated with the students in some way. Other students took a critical, analytical stance, drawing on their prior knowledge of structural inequities. Still other students, especially those who had prior knowledge of the food system, showed resistance, whether by questioning the actions of the people in the texts or questioning the content and authors of the texts. In addition, some students showed evidence of taking on different perspectives that conflicted with their prior beliefs, whether with respect to immigration or the American Dream.
Ultimately, I advance three arguments in this dissertation. One is that multicultural texts about food workers have the potential to encourage students to make a wide range of connections with their prior knowledge or experiences and to try on or entertain multiple perspectives that underlie labor and social justice issues more broadly. Another is that the food system is a rich context for inviting students to think critically about a variety of social justice issues embedded in society. And a third is that educators who teach about labor and social justice issues in the food system need to be both reflective and reflexive with respect to their own teaching practices and grapple with pedagogical questions that have ethical implications.
Wang, Xuan. "Nitrogen conservation by struvite formation during composting process with food wastes." HKBU Institutional Repository, 2015. https://repository.hkbu.edu.hk/etd_oa/201.
Повний текст джерелаBuckley, Louise Anne. "Food choices for hungry broiler breeders : do they prefer quantitative or qualitative dietary restriction?" Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/6522.
Повний текст джерелаDíaz, Gómez Joana. "High-carotenoid maize as feed and food component: mycotoxin contamination, thermal processing, bioavailability and poultry meat production." Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/405891.
Повний текст джерелаEl maíz HC (del inglés high-carotenoid) fue modificado genéticamente para acumular altos niveles de carotenoides, utilizando como base un maíz blanco sudafricano (M37W). Durante tres cosechas consecutivas (2013, 2014 y 2015), se cultivó el maíz HC y su línea isogénica (M37W) en un campo experimental en Lleida (Cataluña, noreste de España). Fusarium spp. infectó la mayoría de granos de maíz de ambos tipos, lo que originó que se diera contaminación por fumonisinas en ambas variedades de maíz en todos los años de estudio, aunque la proporción de granos contaminados fue sustancialmente mayor en el maíz M37W. El maíz cosechado cada año también sirvió como materia prima para elaborar piensos a base de maíz y productos derivados del maíz. Los pollos alimentados con la dieta HC tuvieron parámetros de productividad y salud similares a los pollos alimentados con las dietas M37W y comercial (con pigmentos), y también desarrollaron una pigmentación similar a los pollos alimentados con la dieta comercial (con pigmentos). Los carotenoides provitamina A del maíz HC fueron biodisponibles, al menos en la misma medida que en los aditivos sintéticos y naturales, y contribuyeron a los niveles de retinol hepático en pollos. La carne obtenida de pollos alimentados con la dieta HC tuvo una buena calidad y vida útil sensorial, así como una pigmentación amarilla-anaranjada de larga duración. Por último, los purés elaborados con maíz HC han demostrado no sólo conservar el contenido inicial de carotenoides, sino también aumentarlo debido a la extracción de carotenoides de la matriz alimenticia.
High-carotenoid (HC) maize was genetically engineered to accumulate high levels of carotenoids, using as a basis a South African white maize (M37W). During three consecutive harvest seasons (2013, 2014 and 2015), HC maize and its near isogenic line (M37W) were cultivated in an experimental field in Lleida (Catalonia, Northeastern Spain). Fusarium spp. infected most maize kernels, subsequently, fumonisin contamination was found in both maize varieties in all the years of study, but the proportion of contaminated grains was substantially higher in the M37W maize. Maize grains harvested each year also served as raw material to elaborate maize-based feed and maize-derived products. Chickens fed on the HC diet had similar productivity and health parameters to those fed on the M37W and commercial (plus color additives) diets, and they also developed similar pigmentation to those fed on the commercial (plus color additives) diet. Provitamin A carotenoids from HC maize were bioavailable, at least to the same extent than in synthetic and natural additives, and contributed to liver retinol levels in chickens. Meat obtained from chickens fed on the HC diet had a good quality and sensory shelf life as well as a long-lasting golden pigmentation. Finally, HC maize-based porridges showed not only to preserve the initial carotenoid content, but also to enhance it due to the carotenoid extractability from the food matrix.
PARDALES, Jr Jose R., Akira YAMAUCHI, M. A. QUEVEDO, and Mitsuyo KADOHIRA. "Rootcrops as Food, Feed and Industrial Materials : The Challenge to Address Their Production and Post-harvest Needs." 名古屋大学農学国際教育協力研究センター, 2004. http://hdl.handle.net/2237/8923.
Повний текст джерелаBrandão, Miguel. "Food, feed, fuel, timber or carbon sink? : towards sustainable land-use systems : a consequential life cycle approach." Thesis, University of Surrey, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580604.
Повний текст джерелаMorrow, Alan Thomas Samuel. "Studies on voluntary feed intake of growing pigs with reference to behaviour and efficiency of food utilization." Thesis, Queen's University Belfast, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333822.
Повний текст джерелаMagee, Kieran James. "Addressing the global food security challenge : discovery and assessment of sustainable sources of ingredients for aquaculture feed." Thesis, University of Liverpool, 2018. http://livrepository.liverpool.ac.uk/3028432/.
Повний текст джерелаMcGladdery, Candice. "Evaluation of irrigation water quality guidelines for arsenic and lead, with implications for food and feed safety." Diss., University of Pretoria, 2019. http://hdl.handle.net/2263/77846.
Повний текст джерелаDissertation (MSc)--University of Pretoria, 2019.
Plant Production and Soil Science
MSc
Unrestricted
Yamamoto, Takayuki. "Studies on the safety of food and feed, and on the effects of plant derivedanti-inflammatory components." Kyoto University, 2016. http://hdl.handle.net/2433/215596.
Повний текст джерела0048
新制・課程博士
博士(農学)
甲第19770号
農博第2166号
新制||農||1040(附属図書館)
学位論文||H28||N4986(農学部図書室)
32806
京都大学大学院農学研究科食品生物科学専攻
(主査)教授 河田 照雄, 教授 保川 清, 教授 橋本 渉
学位規則第4条第1項該当
Ghalamkari, Zahra [Verfasser]. "Improving the Nutritional Quality of Food and Feed by Manipulation of Iron Storage in Plants / Zahra Ghalamkari." Berlin : Humboldt-Universität zu Berlin, 2020. http://d-nb.info/1216103666/34.
Повний текст джерелаTRETOLA, MARCO. "FORMER FOODSTUFFS PRODUCTS INTENDED FOR PIG NUTRITION: IN VITRO AND IN VIVO NUTRITIONAL EVALUATION, IMPACT ON GROWTH PERFORMANCES AND GUT HEALTH." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/609808.
Повний текст джерелаLivestock play a key role in food security, through food provision, agricultural production, and by providing employment and income. However, with the diminishing availability of farmland, climate change and the threat of declining water resources, the goal is to meet the growing demand for food and feed by using fewer resources. Exploiting alternative ingredients for livestock, feed could be one way of increasing livestock sustainability. This thesis focused on processed and ready-to-eat food products that are no longer suitable for human consumption due to logistical, manufacturing or packaging defects. Such products would normally go to a landfill yet actually have a high potential of being used as sustainable feed ingredients. The first part of this thesis investigated the chemical composition of six different former foodstuff products (FFPs). Based on the FFP composition data, the digestible energy and metabolisable energy values for pigs were estimated. In addition, the in vitro digestibility values of FFPs were evaluated using a multi-step enzymatic technique. The in vitro predicted glycaemic index and hydrolysis index of the same samples were examined using a two-step in vitro digestion assay. In the second part, the safety issues linked to the use of FFPs were investigated. FFP samples were thus analysed in relation to the microbial load and the presence of presumed remnants of packaging materials. For this purpose, two different methods were used: stereomicroscopy, according to published methods; and stereomicroscopy coupled with a computer vision system. The final part addressed the effects of a diet in which common cereal grains were partially replaced by FFPs in post weaning piglet diets. Specifically, pig growth performance and selected plasma biochemical variables were evaluated in twelve post-weaning piglets. The apparent total tract digestibility of dry matter and the faecal microbiota were also characterized. When compared with common cereal grains used in pig feed formulations, FFPs can be considered a fortified version of cereals, with comparable in vitro digestibility values and with higher glycaemic and hydrolysis indexes, thus characterizing them as an excellent source of carbohydrates. All FFP samples were safe from a microbiological point of view, showing a limited microbial load and were always Salmonella free. Regarding the presumed remnants of packaging materials, the contamination level was always below the safety threshold set by German authorities, and the validated method demonstrated that packaging remnants were mainly from the 1-mm sieve mesh fraction. In order to find a more rapid and objective method for evaluating the packaging remnants, the innovative computer vision system was a rapid alternative for the detection of packaging remnants in ex-food samples when combined with a stereomicroscope. The in vivo study revealed that both in vitro and in vivo digestibility values were higher for the diet based on FFPs compared to the control diet. At the end of the experiment, no differences in growth performance were observed, however the plasma glucose increased in piglets fed FFPs compared to piglets fed the control diet, while the urea concentration decreased. The sequencing analysis of the variable regions V3 and V4 of the 16S rRNA gene showed that the use of FFPs in the post-weaning period decreased the bacterial richness and evenness in the large intestine. The unweighted beta diversity analysis also resulted in a statistically significant difference between the two groups in terms of the taxa composition. The linear discriminant analysis of effect size also demonstrated an increased amount of Proteobacteria phylum and a decreased amount of Lactobacillales genus in the FFP compared to the control group. The results highlighted the potential of these alternative feed ingredients and their safe use in pig nutrition. This is essential for establishing the best scientific practices for the use of FFPs in animal nutrition and feeding. Given the increasing need to obtain a more sustainable livestock sector, research in animal sciences should focus not only on increasing the efficiency of the animal production chain but also on the efficiency of the entire food system in ensuring sustainable nutrition. By recognizing that former foodstuffs that are not suitable for human consumption are a resource for animal nutrition and not a waste product, food and feed industries could reduce the amount of waste sent to landfill or deposed-off every year, thus saving costs, and reducing the environmental impact of the food production chain.
Muckey, Mary Beth. "Evaluation of surface sanitation to prevent biological hazards in animal food manufacturing." Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/34483.
Повний текст джерелаDepartment of Grain Science and Industry
Cassandra K. Jones
Animal food manufacturing facilities need to evaluate biological hazards within their facility due to their severity and probability to cause illness or injury in humans or animals. Control of biological hazards, including Salmonella and Porcine Epidemic Diarrhea Virus (PEDV), in animal food manufacturing facilities may require a preventative control to mitigate the risk of the hazard. Thermal processing is an effective point-in-time control, but does not prevent cross-contamination during drying, cooling, and packaging/load-out of animal food. Therefore, it may be appropriate to sanitize surfaces to prevent cross-contamination of animal food during manufacturing. The objective of the first experiment was to evaluate surface decontamination strategies for Porcine Epidemic Diarrhea Virus (PEDV) using chemical disinfectants to reduce viral RNA on various manufacturing surfaces. Concentrated liquid formaldehyde and sodium hypochlorite reduced the quantity of viral PEDV RNA on all tested surfaces. Rubber belting from a bucket elevator retained the most PEDV RNA, while the polyethylene tote bag retained the least. In the second experiment, surface decontamination was evaluated for Salmonella Typhimurium using liquid and dry chemical sanitizers on various manufacturing surfaces. Surfaces treated with concentrated commercial formaldehyde had no detectable Salmonella after treatment, and surfaces treated with medium chain fatty acids (MCFA) had at least a 4-log reduction compared to the control. The dry commercial acidulant, sodium bisulfate, was the most effective dry sanitizer tested, but had limited efficacy depending on surface type. Experiment 3 further tested the application of two chemical sanitizers against Salmonella Enteritidis on residual surface and feed contamination in pilot-scale mixers. Manufacturing sequence, but not treatment impacted feed and surface contamination of Salmonella Enteritidis. Specifically, there was Salmonella-positive residue in the batch of feed manufactured immediately after the positive control batch. However, no Salmonella residue was detected in batches of feed treated with either concentrated commercial essential oil blend or rice hulls treated with 10% MCFA. Low levels of Salmonella residues were observed from feed and surfaces manufactured after Sequence 1, but no residues were observed by Sequence 2. This data suggests that sequencing of feed during manufacturing can reduce Salmonella-positive contamination within animal food and on manufacturing surfaces, particularly after the second batch or with the use of chemical treatments. In summary, liquid sanitizers have been shown to be effective at reducing Salmonella spp. and PEDV contamination on a variety of animal food manufacturing surfaces, but application and practicality may be limited.
Lindberg, Stina. "Evaluation of a genomic work flow for the detection of Bacillus subtilis in animal feed and food samples." Thesis, Uppsala University, Department of Medical Biochemistry and Microbiology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6345.
Повний текст джерелаBacillus anthracis is one of the most feared agents of biological warfare and causes the
deadly disease called anthrax. SVA (statens veterinärmedicinska anstalt) is working on a
project together with SLV (statens livsmedelsverk) where the target is to find rapid and
effective detection methods for Bacillus anthracis in animal feed and food samples. Bacillus
subtilis, which is harmless, was used in this study as a model organism to Bacillus anthracis.
A known concentration of vegetative Bacillus subtilis was spiked in animal feed and food
samples. The genomic work flow was based on automated DNA isolation and real time PCR.
The aim of the study was to screen for inhibitory components in the animal feed and food
samples using two different DNA isolation robots; Magnatrix 8000 and Biorobot EZ1. The
results showed that DNA of high quality was extracted from the samples with both robots.
However, the CT-value generated by the real time PCR showed considerable variation
depending on the sample matrix. Some samples, for instance egg and liver, were problematic
and gave low concentrations and high CT-values probably due to inhibitory components in the
samples. Further studies will be needed to solve these problems and optimize the methods that
were used in this study.
Cheng, Zhang. "Use of food waste feeds for culturing low trophic level fish (grass carp, bighead carp and mud carp): persistent toxic substances." HKBU Institutional Repository, 2014. https://repository.hkbu.edu.hk/etd_oa/76.
Повний текст джерелаJonsäll, Anette. "Sensory quality of pork : Influences of rearing system, feed, genotype, and sex." Doctoral thesis, Uppsala University, Department of Domestic Sciences, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-517.
Повний текст джерелаHampshire crosses of different genotype and sex were used to investigate the effects of rearing system, feed and handling on sensory quality, consumer preference and cooking loss. A selected and trained panel carried out descriptive tests. Two preference tests were carrieout by, in each case, 200 consumers.
The genotype had a major effect on sensory quality in all four studies irrespective of rearing system, feed and sex. In three of the four studies pork from RN¯ carriers scored higher for juicines, tenderness, acidulous taste and meat taste intensity.
Sex showed contradictory effects on sensory quality, while rearing system and feed had minor effects on sensory properties of pork.
Hams (M. biceps femoris) from pigs reared outdoors scored lower for juiciness and acidulous taste than hams from pigs reared indoors. Loins from pigs organically reared (KRAV) scored lower for juiciness and higher for crumbliness than ones from pigs conventionallreared.
Loins (M. longissimus dorsi) aged four days from conventionally fed pigs were juicier than ones from silage-fed pigs. When loins were aged eight days there was no difference in juicines while acidulous taste became weaker and tenderness and meat taste intensity increased.
In the case of loins stored frozen one year, those from silage-fed pigs scored higher for acidulous taste and off-flavour than those from conventionally fed pigs.
Cooking, thawing and total loss data showed minor and contradictory differences between genotypes, sexes, rearing systems and feeding regimes.
Organically and conventionally produced loins were equally liked and loins from RN¯ carrier pigs were preferred to loins from non-carriers.
Scherer, Daniel [Verfasser], and P. [Akademischer Betreuer] Nick. "Pulsed electric field (PEF)-assisted protein recovery from microalgae biomass for food and feed applications / Daniel Scherer ; Betreuer: P. Nick." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1199459437/34.
Повний текст джерелаDoty, Jessica E. "Creating a Non-GMO Grain and Feed Exchange System for Ohio Farmers." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1480522993553463.
Повний текст джерелаChau, Tak-han Gloria, and 周德嫻. "Fishes feeding fishes: the composition, size and volume of wild fish feed used in Hong Kong's maricultureindustry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B27777649.
Повний текст джерелаYeh, Kang-ni, and 葉康妮. "New approaches to food waste recycling and their application potentialin Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31256077.
Повний текст джерелаAlarcon, Chuquichambi Adelaida. "Living digestibility of alfalfa and barley in llamas (Lama glama) in the agricultural experimental center Condoriri." BYU ScholarsArchive, 2005. https://scholarsarchive.byu.edu/etd/5328.
Повний текст джерелаHardy, Zolelwa. "Functional and nutritional characteristics of Bambara groundnut milk powder as an ingredient in yoghurt." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2340.
Повний текст джерелаThe aim of this study was to evaluate Bambara groundnut (BGN) milk subjected to spray drying with a view to establish functional, nutritional and physical properties as an ingredient in BGN yoghurt production. BGN milk powder (BGNMP) was successfully produced employing the spray drying technology. Maltodextrin was used as the drying carrier to elevate total solids of BGNM prior to spray drying. There were three levels of maltodextrin (5, 10 and 15%) employed and 10% was ideal. The optimum spray drying parameters were estimated to be the following; inlet temperature (150oC), outlet temperature (74oC), air pressure (3 bars), flow rate (10% or 16mL/min), and air flow (42.9 m3/h). The functional properties evaluated revealed high water solubility capabilities, making BGNMP readily soluble in water, which is one of the most crucial aspects of milk powders. The water solubility index of BGNMP at all maltodextrin levels ranged from 85.15 to 90.25%. There was a significant (p < 0.05) difference amongst BGNMP (5, 10, and 15%) in colour parameters (lightness, yellowness, redness, chroma and hue angle). BGNMP indicated to have a red and yellow colour, but yellow was more dominant. The particle size and particle size distribution of BGNMP ranged from 86.13 to 162.35 μm and 84.04 to 157.0 μm, respectively and did not differ significantly (p > 0.05).
Hlophe, Samkelisiwe Nosipho. "Utilisation of moringa oleifera (moringa) and pennisetum glandestinum (kikuyu) leaf meals by three commonly cultured fish species in South Africa : tilapia rendalli, oreochiromis, mossambicus and clarias gariepinus." Thesis, University of Limpopo, 2015. http://hdl.handle.net/10386/1433.
Повний текст джерелаThe ability to utilise dietary components differs between fish species. Digestive enzymes may be used to determine the efficiency of the digestive process. In this study, the activities of the digestive enzymes in Tilapia rendalli, Oreochromis mossambicus and Clarias gariepinus were explored. Protease, amylase, lipase and cellulase activities were measured in different parts of the digestive tract of the three fish species. The pH dynamics along the digestive tract were monitored. In all fish species, the presence of food led to a reduction in stomach pH. pH values of 1.54, 1.58 and 2.01 were recorded 12 hours after feeding in Oreochromis mossambicus, Tilapia rendalli and Clarias gariepinus respectively. Protease and amylase activities were significantly higher (P<0.05, ANOVA) in the tilapias than in Clarias gariepinus. The tilapias may be pre-adapted to produce more protease and amylase to digest plant material which is more difficult to digest compared to animal matter. In all species amylase activity was significantly higher in the proximal intestine than in the other parts of the digestive tract (P<0.05, ANOVA). The highest proteolytic activity was recorded in the distal intestines. This is because of the alkaline pH recorded in the proximal and distal intestines which favours for amylase and protease activity respectively. Lipase activities were not significantly different (P>0.05) in all species. Marginal cellulase activities were recorded in all species. It is inferred here that phylogeny and not diet may be the main factor influencing enzyme activities as all fish were fed a similar diet. Two locally available plant diets, kikuyu grass and moringa leaves, were tested as protein sources in the diet of a macrophagous fish, Tilapia rendalli (11.5±1 g). Nine diets (30% CP: 20 MJ/kg) were formulated by substituting fishmeal for kikuyu leaf meal (KLM) and moringa leaf meal (MLM). A control diet contained 10% fishmeal and no leaf meal. Fishmeal was replaced at 25, 50, 75 and 100% by KLM in diets: KLM 25, KLM 50, KLM 75 and KLM 100; then by MLM in diets MLM 25, MLM 50, MLM 75 and MLM 100. Each diet was fed to triplicate groups of fish for 60 days. The best growth (SGR, TGC) was in the control group. There was no significant (P>0.05) decrease in SGR and TGC when KLM replaced up to 50% fishmeal. There was a significant (P<0.05) decrease when MLM replaced >25% fishmeal. Kikuyu diets had no effect on villi height. A trend towards shorter villi was evident with increasing MLM. Digestive enzyme activities also decreased with increasing KLM and MLM vii levels in the diet. Hepatocyte degradation was higher in fish fed moringa-based diets. Anti-nutrients (polyphenols, tannins, saponins and phytate) in moringa may have contributed to the poor growth, irritation of the enterocytes and hepatotoxic effects. These results show that replacing up to 25% fishmeal with KLM is effective in reducing the costs without negatively affecting the growth performance or health of Tilapia rendalli. Adding MLM, even at the lowest level (25%) was expensive and resulted in compromised growth and health. The efficacy of KLM and MLM was also tested as alternative protein sources for Oreochromis mossambicus (12.5±1 g) a microphagous herbivore. The same diets used for Tilapia rendalli were fed to triplicate groups of twenty fish for 60 days. Linear regressions of feed intake, SGR, PER and protein ADC with increasing levels of leaf meal were significant (P<0.05). Superior growth performance, protein ADC and feed utilisation were also recorded in fish fed KLM-based diets than those fed MLM diets. When compared to Tilapia rendalli, Oreochromis mossambicus had superior growth performance and feed utilisation when fed the control diets and the lowest level of KLM. This was attributed to phylogeny. Protease, amylase and lipase decreased with increasing leaf meal levels and were higher in the intestine of fish fed KLMbased diets than those fed MLM-based diets. Fish fed MLM-based diets had higher number of goblet cells in the enterocytes, higher hepatocyte degradation and poor haematological parameters than those fed KLM diets. These adverse alterations were more pronounced in Oreochromis mossambicus compared to those observed in Tilapia rendalli feeding of the same diets. Cost benefit analysis also indicated that substitution fishmeal with KLM is a cheaper protein source in Oreochromis mossambicus diets. Kikuyu leaf meal may be used to replace up to 25% fishmeal without compromising the growth performance and health of Oreochromis mossambicus. Reduced growth and poor health was evident even at the lowest inclusion level of MLM. The effects of replacing fishmeal with KLM and MLM in the diets of a predatory omnivore, Clarias gariepinus were also investigated. The same KLM and MLMbased diets used in the previous experiments were used. Each diet was randomly assigned to triplicate groups of Clarias gariepinus (30.5±2 g) and fed to apparent satiation for 60 days. Significantly higher (P<0.05) growth performance, feed and viii protein utilisation was observed in Clarias gariepinus fed KLM diets compared to those fed MLM. Protein digestibility was higher in Clarias gariepinus fed the control diet than in both tilapias. However, in the treatment diets protein ADC was lower in Clarias gariepinus than in the tilapias. A decrease in the activity of digestive enzymes was also observed with increasing leaf meal level in the diet. This was attributed to the natural feeding habits and digestive adaptations of the different fish species. No histological alterations were found in liver of fish fed the control diet. Increased hepatocyte degradation was seen in fish fed higher levels of KLM and MLM in the diet. The enterocytes showed a significant increase in the number of goblet cells with increasing levels of MLM. Villi height decreased significantly (P<0.05) when MLM replaced >75 fishmeal. The damage to the hepatocytes and enterocytes as well as the poor health condition shown by haematological parameters was more pronounced in Clarias gariepinus than in the tilapias. This suggests that the predatory fish is not equipped to utilise high levels of leaf meals in its diet. The results of this study indicate that KLM can replace up to 25% fishmeal and that adding MLM resulted in reduced performance. Higher profit index and lower incidence cost was observed KLM diets than in MLM diets. Anti-nutrients in the leaf meals were the main factors leading to reduced feed intake and poor growth in fish fed the plant-based diet. Therefore, a subsequent study was undertaken to determine the efficacy of exogenous enzyme supplementation to reduce the negative effects of anti-nutrients and improve fish growth. A commercial multi-enzyme Natuzyme50® was supplemented at a rate of 0 (control), 0.25, 0.5, 0.75 and 1.00 g/kg DM feed in the best performing diet (KLM 25). These diets were tested in Oreochromis mossambicus. Natuzyme50® supplementation led to improved growth performance. Fish fed the diet containing 0.50 g/kg had the best growth performance and protein ADC and highest levels of digestive enzyme activities. At higher (>0.50 g/kg) enzyme supplementation levels, growth performance decreased. The improved growth performance with enzyme supplementation was attributed to the presence of enzymes such as cellulase and xylanase in the cocktail that are not naturally produced by fish. In addition, the activities of endogenous enzymes were enhanced. The optimal Natuzyme50® dietary level for optimal growth performance in Oreochromis mossambicus was 0.62 g/kg DM feed.
Van, Rooyen R. S. "Improved pellet quality following the implementation of a HACCP system in a commercial animal feed plant." Diss., Pretoria ; [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-03092005-103146.
Повний текст джерелаHannon, Robert Logan, of Western Sydney Hawkesbury University, Faculty of Agriculture and Horticulture, and School of Agriculture and Rural Development. "An evaluation of bentonite feed additives in horses and dogs and a reflection on the research process." THESIS_FAH_ARD_Hannon_R.xml, 1996. http://handle.uws.edu.au:8081/1959.7/738.
Повний текст джерелаMaster of Science (Hons) (Systems Agriculture)