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| Registros recuperados: 17 | |
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| Yong, C.; Halekoh, Ulrich; Jørgensen, Henry; Lauridsen, Charlotte. |
| Three diets were prepared with ingredients cultivated by each of three different farming systems, low input of fertilizer without pesticides (LIminusP), low input of fertilizer and high input of pesticides (LIplusP), and high input of fertilizer and high input of pesticides (HIplusP). A preference test was conducted to investigate whether rats could distinguish among the three iso-energetic and iso-nitrogeneous diets, and the influence of the mothers’ diet was accordingly studied with regard to the food choice of the progeny. The experimental diets contained potatoes, carrots, peas, green kales, apples, and rapeseed oil and were formulated to meet the NRC requirements for growing rats by mixing. Rats were weaned from dams, which had been fed one of the... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health. |
| Ano: 2005 |
URL: http://orgprints.org/9344/1/9344.pdf |
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| Lauridsen, Charlotte; Jørgensen, Henry; Halekoh, Ulrich; Christensen, Lars Porskjær. |
| The effect of three iso-energetic and iso-nitrogeneous diets composed of ingredients originating from three different cultivation systems (“Organic”, low input of fertilizer without pesticides; “Minimally fertilised”, low input of fertilizer and high input of pesticides, “Conventional”, high input of fertilizer and high input of pesticides) was investigated with respect to several physiological responses and biomarkers of health using a rat model. The diets were optimized according to the nutritional requirements of rats, except for a high content of fat. The diets consisted of equal proportions of potatoes, carrots, peas, green kale, apples, and rapeseed oil, which were grown according to three different cultivation systems. Even though most of the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health. |
| Ano: 2005 |
URL: http://orgprints.org/4370/2/Lauridsen_etal_4p_revised%2Ded.doc |
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| Lauridsen, Charlotte; Halekoh, Ulrich; Jacobsen, Maja; Jørgensen, Henry. |
| Mange forbrugere anser økologiske fødevarer for at være af bedre kvalitet, sundere og mere næringsrige end fødevarer produceret ved konventionelle metoder. Men forskning på området, der kan fastslå en sådan sammenhæng, er enten ikke tilstede eller mangelfuld. Ingen forskningsresultater, der kan be- eller afkræfte forbrugernes opfattelse. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general Food security; Food quality and human health. |
| Ano: 2011 |
URL: http://orgprints.org/19734/1/19734a.pdf |
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| Søltoft, Malene; Nielsen, J.; Laursen, Kristian Holst; Husted, Søren; Halekoh, Ulrich; Knuthsen, Pia. |
| The demand for organic food products is steadily increasing partly due to the expected health benefits of organic food consumption. Polyphenols, such as flavonoids and phenolic acids, are a group of secondary plant metabolites with presumably beneficial health effects, and contents in plants are affected by, for example, plant nutrient availability, climate, pathogen infection, and pest attack. In the current study, onions, carrots, and potatoes were cultivated in two-year field trials in three different geographical locations, comprising one conventional and two organic agricultural systems. The contents of flavonoids and phenolic acids in plants were analyzed by pressurized liquid extraction and high-performance liquid chromatography−ultraviolet... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general; Food systems. |
| Ano: 2010 |
URL: http://orgprints.org/19119/4/19119.pdf |
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| Knuthsen, Pia; Soeltoft, Malene; Laursen, Kristian Holst; Bysted, Anette; Madsen, Katja H; Nielsen , John; Halekoh, Ulrich; Husted, Søren. |
| The objective of the present study was to compare the content of selected bioactive compounds in organically and conventionally grown crops, and to evaluate if the ability of the crops to synthesize selected secondary metabolites was systematically affected by growth systems across different growth years as well as soil types. The results showed that contents of neither polyacetylenes and carotenoids in carrots, flavonoids in onions, nor phenolic acids in carrots and potatoes were significantly influenced by growth system. Thus it could not be concluded that the organically grown crops had higher contents of bioactive compounds than the conventionally grown. This indicates that giving preference to organic products because they contain more bioactive... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health. |
| Ano: 2011 |
URL: http://orgprints.org/19815/3/19815.pdf |
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| Yong, Chen; Halekoh, Ulrich; Jørgensen, Henry; Lauridsen, Charlotte. |
| A preference test was conducted to investigate whether rats could distinguish among three iso-energetic and iso-nitrogeneous human diets prepared with ingredients cultivated by each of three different farming strategies: LIminusP: low input of feritlizer without pesticides, LIplusP: lowinput of fertilicer and high input of pesticides and LHplusP: high input of fertilizer and high input of pesticides. The experimental diets were formulated to meet the NRC requirements for growing rats by mixing potatoes, carrots, peas, green kales, apples, and rapeseed oil. For five days, rats (N=27) had free access to each of the three diets, and consumption of each of the diets was recorded daily. Thereafter, rats were offered a standard laboratory chow until the test... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Health and welfare Feeding and growth. |
| Ano: 2004 |
URL: http://orgprints.org/5160/1/5160.pdf |
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| Laursen, Kristian Holst; Schjoerring, Jan K.; Olesen, Jørgen E.; Askegaard, Margrethe; Halekoh, Ulrich; Husted, Søren. |
| The multielemental composition of organic and conventional winter wheat, spring barley, faba bean, and potato was analyzed with inductively coupled plasma−optical emission spectrometry (ICP-OES) and −mass spectrometry (ICP-MS). The crops were cultivated in two years at three geographically different field locations, each accommodating one conventional and two organic cropping systems. The conventional system produced the highest harvest yields for all crops except the nitrogen-fixing faba bean, whereas the dry matter content of each crop was similar across systems. No systematic differences between organic and conventional crops were found in the content of essential plant nutrients when statistically analyzed individually. However, chemometric analysis of... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general Farming Systems Soil Values; Standards and certification Food systems. |
| Ano: 2011 |
URL: http://orgprints.org/19091/4/19091.pdf |
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| Jørgensen, Henry; Halekoh, Ulrich; Lauridsen, Charlotte. |
| Total energy expenditure or heat production is comprised of basal metabolic rate, thermic effect of food, and physical activity. Physical activity is the most variable and easily altered component of total heat production. Physical activity is influenced by a number of biological parameters i.e. diet, genetics, age, and gender. The diet components of the macro as well as micronutrients and other components (secondary metabolites) associated with a diet could contribute to the well being of the animal and cause variation in physical activity. In order to investigate physical activity as a parameter to differentiate diets based on conventional or organic grown carrots the total heat production and physical activity was measured in a rat model. The... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general. |
| Ano: 2011 |
URL: http://orgprints.org/18916/5/18916.pdf |
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| Jørgensen, Henry; Halekoh, Ulrich; Lauridsen, Charlotte. |
| Food preference tests represent an approach in food quality research, taking advantage of the instinctive feeding behavior of animals by allowing them to choose between food samples. A great number of investigations using laboratory rats concerning essential and/or dangerous contents are based on this method and have shown its effectiveness. The selection of food is influenced to some degree by smell and taste, but mostly by wholesomeness and need. In the present study a preference test was used in order to test eventual selective differences among rats with regard to same composition, but cultivated in three different systems. The experimental diets were formulated to meet the NRC requirements for rats by mixing 40% of freeze dried carrots with an... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general. |
| Ano: 2011 |
URL: http://orgprints.org/18915/5/18915.pdf |
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| Søltoft, Malene; Eriksen, M.R.; Träger, A.W.B.; Nielsen, J.; Laursen, Kristian Holst; Husted, Søren; Halekoh, Ulrich; Knuthsen, Pia. |
| A rapid and sensitive analytical method for quantification of polyacetylenes in carrot roots was developed. The traditional extraction method (stirring) was compared to a new ultrasonic liquid processor (ULP)-based methodology using high-performance liquid chromatography−ultraviolet (HPLC−UV) and mass spectrometry (MS) for identification and quantification of three polyacetylenes. ULP was superior because a significant reduction in extraction time and improved extraction efficiencies were obtained. After optimization, the ULP method showed good selectivity, precision [relative standard deviations (RSDs) of 2.3−3.6%], and recovery (93% of falcarindiol) of the polyacetylenes. The applicability of the method was documented by comparative analyses of carrots... |
| Tipo: Journal paper |
Palavras-chave: Food systems. |
| Ano: 2010 |
URL: http://orgprints.org/19121/4/19121.pdf |
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| Jensen, Maja M.; Jørgensen, Henry; Halekoh, Ulrich; Watzl, Bernhard; Thorup-Kristensen, Kristian; Lauridsen, Charlotte. |
| BACKGROUND: Organic food is perceived as being of better quality and healthier than conventional foods although the scientific research on organic foodstuffs is highly contradictory. The aim of the present study was to investigate if an intake of carrots from four different cultivation systems grown in two consecutive years would influence various biomarkers of health in a rat model. All rats were fed a diet with 40% carrot content. The carrots were grown under conventional (C), “minimalistic” organic (O1), organic (O2), or “very” organic cultivation systems (O3). A control group (CO) being fed standard rat chow was included. RESULTS: The plasma α-tocopherol concentration was higher in the O2 carrot-based diet than in the C carrot based-diet in one year,... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general Food security; Food quality and human health. |
| Ano: 2012 |
URL: http://orgprints.org/19732/10/19732.pdf |
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| Jensen, Maja M.; Jørgensen, Henry; Halekoh, Ulrich; Olesen, Jørgen E.; Lauridsen, Charlotte. |
| The aim of the current study was to investigate if there are any health effects of long-term consumption of organically grown crops using a rat model. Crops were retrieved over two years from along-term field trial at three different locations in Denmark, using three different cultivation systems(OA, organic based on livestock manure; OB, organic based on green manure; and C, conventional with mineral fertilizers and pesticides)with two field replicates. The cultivation system had an impact on the nutritional quality, affecting γ-tocopherol, some amino acids, and fatty acid composition. Additionally, the nutritional quality was affected by harvest year and location. However, harvest year and location rather than cultivation system affected the measured health... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health. |
| Ano: 2012 |
URL: http://orgprints.org/21074/1/21074.pdf |
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| Husted, Søren; Laursen, Kristian Holst; Larsen, Erik Huusfeldt; Kapolna, Emese; Knuthsen, Pia; Søltoft, Malene; Bügel, Susanne; Mark, Alicja Budek; Lauridsen, Charlotte; Jacobsen, Maja; Jørgensen, Henry; Halekoh, Ulrich; Kristensen, Kristian. |
| Trace elements, bioactive secondary metabolites and vitamins are among the most important quality parameters in plants. Yet, very little information is available on their content, bioavailability and health effects in organically grown plant food products. The main objective of OrgTrace is to study the impact of different agricultural management practices relevant for organic farming on the ability of cereal and vegetable crops to absorb trace elements from the soil and to synthesize bioactive compounds (secondary metabolites, antioxidant vitamins and phytates) with health promoting effects. Based on different plant products produced in OrgTrace, diets were composed and the bioavailabilities of health promoting substances were analyzed in a human... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general; Farming Systems; Soil; Food systems. |
| Ano: 2011 |
URL: http://orgprints.org/18877/4/18877.pdf |
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| Lauridsen, Charlotte; Jørgensen, Henry; Halekoh, Ulrich; Christensen, Lars Porskjær. |
| In a recent study it was investigated, through a well-controlled animal feeding experiment, whether conventional and organic food products showed differences in animal physiology of a type and magnitude that could indicate that organic products would affect humans differently. The primary, but still tentative conclusion from this study was that the most significant effects on rats was observed on health aspects that have rarely been assessed in prior studies: Immune status, sleep/activity pattern, accumulation of adipose tissue, liver function, and vitamin E status, while a large numbers of markers of “traditional” nutritional value showed no differences. Although the results of the present study could not directly be applied to organic and conventional... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health. |
| Ano: 2005 |
URL: http://orgprints.org/9345/1/9345.pdf |
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| Lauridsen, Charlotte; Yong, Chen; Halekoh, Ulrich; Bügel, Susanne; Brandt, Kirsten; Christensen, Lars Porskjær; Jørgensen, Henry. |
| BACKGROUND: The aim of this study was to identify health-related biomarkers affected by different growth conditions of plant foods. Rats were fed balanced diets composed of vegetables and rapeseed oil from three different cultivation systems (‘LIminusP’, low fertiliser input, without pesticides; ‘LIplusP’, low fertiliser input, with pesticides; and ‘HIplusP’, high fertiliser input, with pesticides) chosen to cover a broad range of management options, rather than representing actual food production systems. RESULTS: Rats fed LIminusP and LIplusP had a higher serum IgG concentration compared to rats fed HIplusP and 14% less adipose tissue. Rats fed LIminusP showed less movement during the day than the other treatments, with no differences during the... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general Food security; Food quality and human health. |
| Ano: 2008 |
URL: http://orgprints.org/19725/4/19725.pdf |
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| Registros recuperados: 17 | |
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