Dissertations / Theses on the topic 'Methos of sowing'
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Schlueter, David Henry. "Overseeding Clovers into Permanent Pastures." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/34719.
Full textMaster of Science
Pettersson, C. G. "Predicting malting barley protein concentration : based on canopy reflectance and site characteristics /." Uppsala : Dept. of Crop Production Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200756.pdf.
Full textSteindor, Christopherus [Verfasser]. "Methode zur Prozessoptimierung mit Hilfe von Fehleridentifikation und Fehleranalyse sowie Pilotanwendungen in einem Kaltwalzwerk / Christopherus Steindor." Aachen : Shaker, 2004. http://d-nb.info/1181604761/34.
Full textMeyer, Roman. "Entwicklung einer Methode zur Diskriminierung lebender Salmonella-Enteritidis- und Salmonella-Typhimurium-Impfstämme sowie Etablierung und Evaluierung einer molekularbiologischen Methode zur raschen Identifizierung von Salmonella-Serovaren." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-180727.
Full textDusemond, Michael. "Die Konzernanschaffungs- und Konzernherstellungskosten nach [section] 304 HGB : Ermittlung, Bewertung sowie Informationsbeschaffung auf der Grundlage einer eigenständigen Konzernkostenrechnung /." Stuttgart : Schäffer-Poeschel, 1994. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=006410104&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textFigueroa, Rodrigo A. "Gasemissionsverhalten abgedichteter Deponien : Untersuchungen zum Gastransport durch Oberflächenabdichtungen sowie zum mikrobiellen Abbau von Methan und FCKWs in Rekultivierungsschichten /." Bonn : Economica-Verl, 1998. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=007978570&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textHoffmann, Claudia [Verfasser]. "Lanthanhexaaluminate und nanoporöse Siliciumcarbide als Katalysatorsysteme und deren Anwendung in der Oxidation sowie Kohlenstoffdioxidreformierung von Methan / Claudia Hoffmann." München : Verlag Dr. Hut, 2014. http://d-nb.info/1063222230/34.
Full textHoffmann, Claudia Rosemarie Ilse [Verfasser]. "Lanthanhexaaluminate und nanoporöse Siliciumcarbide als Katalysatorsysteme und deren Anwendung in der Oxidation sowie Kohlenstoffdioxidreformierung von Methan / Claudia Hoffmann." München : Verlag Dr. Hut, 2014. http://d-nb.info/1063222230/34.
Full textMeyer, Roman [Verfasser], and Reinhard [Akademischer Betreuer] Straubinger. "Entwicklung einer Methode zur Diskriminierung lebender Salmonella-Enteritidis- und Salmonella-Typhimurium-Impfstämme sowie Etablierung und Evaluierung einer molekularbiologischen Methode zur raschen Identifizierung von Salmonella-Serovaren / Roman Meyer. Betreuer: Reinhard Straubinger." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1069491373/34.
Full textDomagk, Max. "Identifikation und Quantifizierung korrelativer Zusammenhänge zwischen elektrischer sowie klimatischer Umgebung und Elektroenergiequalität." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-211866.
Full textPower quality levels in public low voltage grids are influenced by many factors which can either be assigned to the electrical environment (connected consumers, connected genera-tion, network characteristics) or to the non-electrical environment (e.g. climatic conditions) at the measurement site. Type and amount of connected consumers (consumer topology) are expected to have a very high impact on power quality (PQ) levels. The generation topology is characterized by number and kind of equipment and generating installations like photovoltaic systems which are connected to the LV grid. The electrical parameters of the grid define the network topology. The parameters which are most suitable to describe each of the three topologies and the climatic environment will be identified. Voltage and current quality in public low voltage (LV) grids vary depending on location and time. They are quantified by a set of different parameters which either belong to events (e.g. dips) or to variations (e.g. harmonics). This thesis exclusively addresses continuous parameters describing variations. Continuous phenomena like harmonics are closely linked to an one-day-cycle which implies a more or less periodic behavior of the continuous power quality parameters. Consumer topologies such as office buildings or residential areas differ in their use of equipment. Time series analysis is used to distinguish between different consumer topologies and to identify characteristic weeks. The clustering of one-day time series is applied to identify characteristic days within the weeks of certain topologies. Based on the results, emission profiles for certain current quality parameters of different consumer topologies will be defined. Due to the characteristic harmonic current emission of certain consumer topologies which represents the typical user behaviour a classification system is developed. It is used to automatically classify the emission profiles of harmonic currents for unknown measurements and to estimate a likely consumer topology. A classification measure is introduced in order to identify unusual or false classified emission profiles. The usage behaviour of equipment by customers usually varies over the year. Subsequently, the levels of PQ parameters like harmonics may show seasonal variations which are identified by using newly defined parameters. The introduction of new device technologies on a large scale like the transition from incandescent to LED lamps might result in long-term changes to the levels of PQ parameters (e.g. harmonics). The analysis of the long-term behavior (trend) will be applied in order to quantify global trends (looking on the measurement duration as a whole) and local trends (looking on individual segments of the whole time series)
Klemens, Patrick. "Entwicklung einer Methode mittels hochauflösender ICP-MS zur Bestimmung von Siliciumspuren in anorganischen und organischen Matrices sowie von Siloxanen in Geweben." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=968536506.
Full textFlauder, Stefan [Verfasser], Frank A. Gutachter] Müller, Ulrich [Gutachter] Lohbauer, and Jürgen [Gutachter] [Groll. "Herstellung von β-Tricalciumphosphat Gerüsten durch Gefrierstrukturierung sowie Aufklärung und Evaluation der Methode / Stefan Flauder ; Gutachter: Frank A. Müller, Ulrich Lohbauer, Jürgen Groll." Jena : Friedrich-Schiller-Universität Jena, 2016. http://d-nb.info/1177612674/34.
Full textHeinemann, Felix [Verfasser]. "Sequentielle Kaltperfusion mit HTK und UW, sowie kalte Lagerung in UW als neue Methode der Organkonservierung im Rahmen der orthotopen Lebertransplantation / Felix Heinemann." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2014. http://d-nb.info/1047336715/34.
Full textHold, Markus. "Erzeugung von Radikalen aus teilhalogenierten Methan-, Alkohol- und Etherderivaten und deren Reaktionen sowie thermische und chemische Aktivierung von 1-Ethinyl-1-methylcyclopropan in der Gasphase." [S.l.] : [s.n.], 2001. http://webdoc.sub.gwdg.de/diss/2002/hold/hold.pdf.
Full textMittelhaus, Sebastian [Verfasser]. "Mutationsanalysen in den Genen NKX2.5 und BMP4 bei Patienten mit Ostium secundum Defekt (ASD II) sowie Evaluierung angewendeter Mutationsdetektionstechniken im Vergleich zur DHPLC-Methode / Sebastian Mittelhaus." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2012. http://d-nb.info/1030290768/34.
Full textHiendl, Johannes Gregor. "Untersuchungen zum ruminalen Abbau des Proteins von Nebenprodukten aus der Bioethanolherstellung in situ und mit einer neuen in vitro-Methode sowie Übertragbarkeit der Ergebnisse auf die praktische Milchkuhfütterung." Doctoral thesis, Universitätsbibliothek Leipzig, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:15-20100315-092453-5.
Full textAttempts to replace fossil fuel with biomass have increased considerably in recent years and demonstrate the need for a reliable and routine determination of the nutritive value of byproducts from the Bioethanol Industries. Current laboratory techniques to determine the content of rumen undegraded dietary protein (UDP) either do not deliver satisfactory results or are not established for all types of feedstuff like for example distillers grains from the Bioethanol Industries. The aim of this study was to develop a dynamic in vitro procedure using an established discrete incubator, which makes it possible to estimate the proportion of UDP of byproducts from the Bioethanol Industries with high protein content or of other concentrated feedstuffs. Further aims were the validation of results obtained through that way using in vivo-measurements on the ruminal degradability and on rumen physiological parameters plus the practical demonstration of the significance of these results in a feeding trial on a herd of dairy cows. Samples were of dried distillers grains with solubles from a wheat barley mixture (WGT), pressed distillers grains from rye (RPS), both of their raw materials rye (ROG) and wheat barley mixture of 85 % wheat and 15 % barley (WGM), as well as rape seed cake (RKU), rape seed meal (REX) and soy bean meal (SEX). The ruminal degradation of these feedstuffs was tested in a DAISY II Incubator (ANKOM Technology Corp., Macedon, USA) using a procedure similar to that recommended by the manufacturer using both incubator bags (type F 57, 25 μm pore size) and rumen bags (type R 510, 51 μm pore size). Two rumen fistulated Holstein-Friesian (HF) cows during dry season were available as donors of rumen fluid for the in vitro procedure and as test animals for the in situ examination similar to MADSEN and HVELPLUND (1994). The impacts of the protein equivalent substitution of REX, RPS and WGT in the ration on rumen physiological parameters was tested on these animals during a daily milk yield of 42 kg. The effect of the protein equivalent substitution of REX and RPS as part of the ration on live weight, feed intake, milk yield and milk content was tested during a 120 days lasting feeding trial with two groups of a HF dairy cow herd. The use of F 57 incubator bags did not lead to any useful results for the proportion of UDP. By contrast, using the R 510 rumen bags and assuming a ruminal passage rate of 5 %/h it was for the in vitro- (in situ-) procedure as follows: RPS 42 (33) %, WGT 21 (33) %, SEX 30 (28) %, REX 33 (33) %, RKU 25 (28) %, ROG 14 (21) % and WGM 17 (21) %. Variations between the two techniques occurred especially to the distillers grains products. At least with RPS this could be a result of different microbial nitrogen contamination of the bag residuals, which happened in situ and led to an underestimation of the degradation rate there. This might have been less intensive in the incubator. No conclusive explanation could be found for the situation with WGT, where the degradation rate was overestimated in the incubator. For all other feedstuffs, the variations were within the statistic spread, that is typical for the reference technique (in situ technique). Distillers grains as part of the ration in comparison with REX containing ration led to significant higher concentrations of ammonia (NH3) in the rumen fluid, most notably immediately after feed intake. The acetate propionate quotient was 2,2 in the RPS containing ration and significant higher than 2,1 in the REX and WGT containing rations. This could be due to a higher content of cruder fibre (XF) in the ration with RPS. The higher gradient of the XP degradation curve especially immediately after feed intake could account for the significant higher NH3 concentrations in the rumen fluid. This gradient could not be simulated well enough in the incubator to predict the feedstuffs impact on the resulting NH3 concentrations in the rumen fluid, as the UDP by itself is not sufficient for this. The analyzed NH3 concentrations of the fluid substances in the incubators fermenter are an advice of the higher NH3 concentrations in the animals’ rumen fluid. The feeding trial with two groups of dairy cows showed a higher feed intake of the RPS containing ration in comparison with the ration with REX. Although milk yield, milk protein and milk fat was not affected, the group fed RPS containing ration had a significant higher concentration of milk urea during the feeding trial. This could be due to the higher NH3 concentrations in the rumen fluid mentioned above. As RPS is milled material, its higher XF content should not slow down the digesta flow, but could push it on in consequence of a better adapted microbial milieu. This might be responsible for the higher feed intake of the RPS-containing ration. Because there were no apparent differences between REX and RPS containing ration regarding economic parameters like milk yield, milk protein and milk fat as well as energetic efficiency of feed effort and milk yield, both protein rich concentrate feedstuffs are seen to be equivalent. The values of UDP identified in the incubator have a practical meaning, not only because they did not show any difference between REX and RPS but also as they correspond closely enough with the values identified with the in situ technique. The in vitro R 510 technique not only has the potential to replace the in situ technique for determining the UDP but might also have the advantage of a lower nitrogen contamination of the bag residuals. Assuming that this technique can be established with rumen content gained from an esophageal tube or from slaughtered animals, no more rumen fistulated animals are necessary for a reliable assessment of UDP
Düsing, Annette. "Das Modell der isoliert perfundierten Rattenleber : Verbesserung der Methode sowie Testung eines Kombinationspräparates aus Matricaria recutita L., Carum Carvi L. und Mentha x poperita L. auf cholerettische Aktivität /." [S.l. : s.n.], 1998. http://www.gbv.de/dms/bs/toc/253243785.pdf.
Full textMindt, Sonani [Verfasser]. "Etablierung einer LC/MS-Methode zur Quantifizierung von Nimodipin in Plasma und Liquor sowie von Glutamat in Liquor : ein Beitrag zur Diagnostik und Therapie des zerebralen Vasospasmus / Sonani Mindt." Ulm : Universität Ulm, 2020. http://d-nb.info/1205371729/34.
Full textGehling, Julia [Verfasser], Christoph [Gutachter] Maier, and Zoltán F. [Gutachter] Kisvárday. "Test-Retest-Reliabilität der Hitze-Kälteschmerz-Methode von Conditioned Pain Modulation (CPM) an gesunden Probanden sowie dessen Korrelation zu Parametern der quantitativ sensorischen Testung / Julia Gehling ; Gutachter: Christoph Maier, Zoltán F. Kisvárday." Bochum : Ruhr-Universität Bochum, 2017. http://d-nb.info/1137379685/34.
Full textCarl, Corinna [Verfasser], Götz [Gutachter] Gelbrich, and Kathleen [Gutachter] Wermke. "Vergleichende Bestimmung des dentalen Alters von Kindern und Jugendlichen mit Hilfe des "London Atlas of Dental Development", der Score-Methode nach Demirjian sowie ihrer Modifikation nach Willems / Corinna Carl ; Gutachter: Götz Gelbrich, Kathleen Wermke." Würzburg : Universität Würzburg, 2020. http://d-nb.info/1221063200/34.
Full textJasmin, Karmowski [Verfasser], Volker [Akademischer Betreuer] Böhm, Gerhard K. E. [Akademischer Betreuer] Scriba, and Sascha [Akademischer Betreuer] Rohn. "Ermittlung der lipophilen antioxidativen Aktivitäten/ Kapazitäten mittels Photochemolumineszenz-Methode : Untersuchungen zur Anwendung auf Carotinoide, Vitamin E und Lebensmittel sowie zum Einfluss von Wechselwirkungen und Lebensmittelmatrix / Karmowski. Jasmin. Gutachter: Volker Böhm ; Gerhard K. E. Scriba ; Sascha Rohn." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1076038638/34.
Full textWrage, Jasmin [Verfasser]. "Entwicklung von Methoden zum Nachweis von Cocos nucifera im Hinblick auf Kokosnussallergien sowie im Kontext der Echtheitsprüfung von Kokosblütenzucker : Development of methods for the detection of Cocos nucifera with regard to coconut allergies and in the context of authentication of coconut blossom sugar / Jasmin Wrage." Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2020. http://d-nb.info/1221084305/34.
Full textDrabik, Anna Izabela [Verfasser]. "Evaluationsmethoden populationsbasierter Programme zur Prävention chronischer Krankheiten am Beispiel von Disease-Management-Programmen : ein Überblick sowie eine Anwendung der Propensity-Score-Matching-Methode auf das Disease- Management-Programm „Typ-II-Diabetes“ der BARMER-Krankenkasse in Deutschland / Anna Izabela Drabik." Köln : Deutsche Zentralbibliothek für Medizin, 2012. http://d-nb.info/1025008189/34.
Full textPerner, Holger. "Untersuchungen zur Methanbildung im Sediment der unteren Mittelelbe sowie der Unterelbe /." 1996. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=007652537&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textFischer, von Weikersthal Sophia. "Differentielle Normale Pulsvoltametrie : eine methode zur Untersuchung funktionaler Parameter der dopaminergen und serotoninergen Neurotransmission sowie deren pharmakologischer Beeinflussung /." 1994. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=006755466&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textJakes, Peter. "Chromatographische Methode zur vollständigen Isolierung der stickstoffendohedralen Fullerene N@C60 und N@C70 sowie deren EPR-Spektren in Flüssigkristallen." Phd thesis, 2005. https://tuprints.ulb.tu-darmstadt.de/583/1/Dissertation_Version_05-07-06.pdf.
Full textJakes, Peter [Verfasser]. "Chromatographische Methode zur vollständigen Isolierung der stickstoffendohedralen Fullerene N_372C60 und N_372C70 sowie deren EPR-Spektren in Flüssigkristallen / vorgelegt von Peter Jakes." 2005. http://d-nb.info/975692461/34.
Full textDomagk, Max. "Identifikation und Quantifizierung korrelativer Zusammenhänge zwischen elektrischer sowie klimatischer Umgebung und Elektroenergiequalität." Doctoral thesis, 2015. https://tud.qucosa.de/id/qucosa%3A29896.
Full textPower quality levels in public low voltage grids are influenced by many factors which can either be assigned to the electrical environment (connected consumers, connected genera-tion, network characteristics) or to the non-electrical environment (e.g. climatic conditions) at the measurement site. Type and amount of connected consumers (consumer topology) are expected to have a very high impact on power quality (PQ) levels. The generation topology is characterized by number and kind of equipment and generating installations like photovoltaic systems which are connected to the LV grid. The electrical parameters of the grid define the network topology. The parameters which are most suitable to describe each of the three topologies and the climatic environment will be identified. Voltage and current quality in public low voltage (LV) grids vary depending on location and time. They are quantified by a set of different parameters which either belong to events (e.g. dips) or to variations (e.g. harmonics). This thesis exclusively addresses continuous parameters describing variations. Continuous phenomena like harmonics are closely linked to an one-day-cycle which implies a more or less periodic behavior of the continuous power quality parameters. Consumer topologies such as office buildings or residential areas differ in their use of equipment. Time series analysis is used to distinguish between different consumer topologies and to identify characteristic weeks. The clustering of one-day time series is applied to identify characteristic days within the weeks of certain topologies. Based on the results, emission profiles for certain current quality parameters of different consumer topologies will be defined. Due to the characteristic harmonic current emission of certain consumer topologies which represents the typical user behaviour a classification system is developed. It is used to automatically classify the emission profiles of harmonic currents for unknown measurements and to estimate a likely consumer topology. A classification measure is introduced in order to identify unusual or false classified emission profiles. The usage behaviour of equipment by customers usually varies over the year. Subsequently, the levels of PQ parameters like harmonics may show seasonal variations which are identified by using newly defined parameters. The introduction of new device technologies on a large scale like the transition from incandescent to LED lamps might result in long-term changes to the levels of PQ parameters (e.g. harmonics). The analysis of the long-term behavior (trend) will be applied in order to quantify global trends (looking on the measurement duration as a whole) and local trends (looking on individual segments of the whole time series).
Klemens, Patrick [Verfasser]. "Entwicklung einer Methode mittels hochauflösender ICP-MS zur Bestimmung von Siliciumspuren in anorganischen und organischen Matrices sowie von Siloxanen in Geweben / Patrick Klemens." 2002. http://d-nb.info/968536506/34.
Full textHellmann, Robert [Verfasser]. "Ab-initio-Berechnung der Wechselwirkungspotentiale von Helium, Neon und Methan sowie theoretische Untersuchungen zu ihren thermophysikalischen Eigenschaften und denen von Wasserdampf / vorgelegt von Robert Hellmann." 2009. http://d-nb.info/999711709/34.
Full textHold, Markus. "Erzeugung von Radikalen aus teilhalogenierten Methan-, Alkohol- und Etherderivaten und deren Reaktionen sowie thermische und chemische Aktivierung von 1-Ethinyl-1-methylcyclopropan in der Gasphase." Doctoral thesis, 2002. http://hdl.handle.net/11858/00-1735-0000-0006-AE9B-A.
Full textCarl, Corinna. "Vergleichende Bestimmung des dentalen Alters von Kindern und Jugendlichen mit Hilfe des "London Atlas of Dental Development", der Score-Methode nach Demirjian sowie ihrer Modifikation nach Willems." Doctoral thesis, 2020. https://doi.org/10.25972/OPUS-21536.
Full textBased on 500 OPGs from the orthodontic department of the University Hospital of Würzburg, a dental age determination was performed using the London Atlas of Dental Development, the method according to Demirjian and its modification according to Willems. The aim was to find out whether it is possible to draw reliable conclusions about the chronological age of a patient. The method according to Willems (M= -0.33y, SD=1.06y) outpreforms the methods according to Demirjian (M=-0.08y SD= 1.27y) as well as the London Atlas (M=0.34y SD=1.09y) and can be applied to the German population
Hunger, Kathrin [Verfasser]. "Intravaskuläre Optische Kohärenztomographie : Anwendung einer neuen hochauflösenden Methode zur Darstellung der normalen Venenwand sowie von Veränderungen nach endoluminaler Laser- und Radiofrequenztherapie ex vivo / vorgelegt von Kathrin Hunger." 2010. http://d-nb.info/1003437567/34.
Full textDüsing, Annette. "Das Modell der isoliert perfundierten Rattenleber : Verbesserung der Methode sowie Testung eines Kombinationspräparates aus Matricaria recutita L., Carum carvi L. und Mentha x piperita L. auf choleretische Aktivität /." 1998. http://www.gbv.de/dms/bs/toc/253243785.pdf.
Full textHiendl, Johannes Gregor. "Untersuchungen zum ruminalen Abbau des Proteins von Nebenprodukten aus der Bioethanolherstellung in situ und mit einer neuen in vitro-Methode sowie Übertragbarkeit der Ergebnisse auf die praktische Milchkuhfütterung." Doctoral thesis, 2009. https://ul.qucosa.de/id/qucosa%3A10821.
Full textAttempts to replace fossil fuel with biomass have increased considerably in recent years and demonstrate the need for a reliable and routine determination of the nutritive value of byproducts from the Bioethanol Industries. Current laboratory techniques to determine the content of rumen undegraded dietary protein (UDP) either do not deliver satisfactory results or are not established for all types of feedstuff like for example distillers grains from the Bioethanol Industries. The aim of this study was to develop a dynamic in vitro procedure using an established discrete incubator, which makes it possible to estimate the proportion of UDP of byproducts from the Bioethanol Industries with high protein content or of other concentrated feedstuffs. Further aims were the validation of results obtained through that way using in vivo-measurements on the ruminal degradability and on rumen physiological parameters plus the practical demonstration of the significance of these results in a feeding trial on a herd of dairy cows. Samples were of dried distillers grains with solubles from a wheat barley mixture (WGT), pressed distillers grains from rye (RPS), both of their raw materials rye (ROG) and wheat barley mixture of 85 % wheat and 15 % barley (WGM), as well as rape seed cake (RKU), rape seed meal (REX) and soy bean meal (SEX). The ruminal degradation of these feedstuffs was tested in a DAISY II Incubator (ANKOM Technology Corp., Macedon, USA) using a procedure similar to that recommended by the manufacturer using both incubator bags (type F 57, 25 μm pore size) and rumen bags (type R 510, 51 μm pore size). Two rumen fistulated Holstein-Friesian (HF) cows during dry season were available as donors of rumen fluid for the in vitro procedure and as test animals for the in situ examination similar to MADSEN and HVELPLUND (1994). The impacts of the protein equivalent substitution of REX, RPS and WGT in the ration on rumen physiological parameters was tested on these animals during a daily milk yield of 42 kg. The effect of the protein equivalent substitution of REX and RPS as part of the ration on live weight, feed intake, milk yield and milk content was tested during a 120 days lasting feeding trial with two groups of a HF dairy cow herd. The use of F 57 incubator bags did not lead to any useful results for the proportion of UDP. By contrast, using the R 510 rumen bags and assuming a ruminal passage rate of 5 %/h it was for the in vitro- (in situ-) procedure as follows: RPS 42 (33) %, WGT 21 (33) %, SEX 30 (28) %, REX 33 (33) %, RKU 25 (28) %, ROG 14 (21) % and WGM 17 (21) %. Variations between the two techniques occurred especially to the distillers grains products. At least with RPS this could be a result of different microbial nitrogen contamination of the bag residuals, which happened in situ and led to an underestimation of the degradation rate there. This might have been less intensive in the incubator. No conclusive explanation could be found for the situation with WGT, where the degradation rate was overestimated in the incubator. For all other feedstuffs, the variations were within the statistic spread, that is typical for the reference technique (in situ technique). Distillers grains as part of the ration in comparison with REX containing ration led to significant higher concentrations of ammonia (NH3) in the rumen fluid, most notably immediately after feed intake. The acetate propionate quotient was 2,2 in the RPS containing ration and significant higher than 2,1 in the REX and WGT containing rations. This could be due to a higher content of cruder fibre (XF) in the ration with RPS. The higher gradient of the XP degradation curve especially immediately after feed intake could account for the significant higher NH3 concentrations in the rumen fluid. This gradient could not be simulated well enough in the incubator to predict the feedstuffs impact on the resulting NH3 concentrations in the rumen fluid, as the UDP by itself is not sufficient for this. The analyzed NH3 concentrations of the fluid substances in the incubators fermenter are an advice of the higher NH3 concentrations in the animals’ rumen fluid. The feeding trial with two groups of dairy cows showed a higher feed intake of the RPS containing ration in comparison with the ration with REX. Although milk yield, milk protein and milk fat was not affected, the group fed RPS containing ration had a significant higher concentration of milk urea during the feeding trial. This could be due to the higher NH3 concentrations in the rumen fluid mentioned above. As RPS is milled material, its higher XF content should not slow down the digesta flow, but could push it on in consequence of a better adapted microbial milieu. This might be responsible for the higher feed intake of the RPS-containing ration. Because there were no apparent differences between REX and RPS containing ration regarding economic parameters like milk yield, milk protein and milk fat as well as energetic efficiency of feed effort and milk yield, both protein rich concentrate feedstuffs are seen to be equivalent. The values of UDP identified in the incubator have a practical meaning, not only because they did not show any difference between REX and RPS but also as they correspond closely enough with the values identified with the in situ technique. The in vitro R 510 technique not only has the potential to replace the in situ technique for determining the UDP but might also have the advantage of a lower nitrogen contamination of the bag residuals. Assuming that this technique can be established with rumen content gained from an esophageal tube or from slaughtered animals, no more rumen fistulated animals are necessary for a reliable assessment of UDP.
Hold, Markus [Verfasser]. "Erzeugung von Radikalen aus teilhalogenierten Methan-, Alkohol- und Etherderivaten und deren Reaktionen sowie thermische und chemische Aktivierung von 1-Ethinyl-1-methylcyclopropan in der Gasphase / vorgelegt von Markus Hold." 2001. http://d-nb.info/964606437/34.
Full textMehls, Christina Josefa Tsikas Dimitrios. "3-Nitrotyrosin als Biomarker des oxidativen Stresses bei Niereninsuffizienz sowie unter Beta-Adrenozeptorantagonisten bei gesunden Probanden : Entwicklung und Anwendung einer Gaschromatographie-Tandem Massenspektometrie-Methode zur Bestimmung von 3-Nitrotyrosin in Humanplasma /." 2004. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=013109022&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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