Relevant bibliographies by topics / Ota

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Academic literature on the topic 'Ota'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 August 2024

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Journal articles on the topic "Ota"

1

Thongzai, Hataikan, Narumol Matan, Palanivel Ganesan, and Tanong Aewsiri. "Interfacial Properties and Antioxidant Activity of Whey Protein-Phenolic Complexes: Effect of Phenolic Type and Concentration." Applied Sciences 12, no. 6 (March 12, 2022): 2916. http://dx.doi.org/10.3390/app12062916.

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Whey protein is a common food additive for enhancing product stability and texture, while phenolics are considered food antioxidants. As a consequence, combining whey protein with phenolics is an effective way to improve protein functionality while also maintaining polyphenol bioactivity. Herein, the functional properties and antioxidant activity of whey protein modified with various types and concentrations of oxidized phenolic compounds, including gallic acid (OGA), ferulic acid (OFA), and tannic acid (OTA), were studied. In general, the modified whey protein had a decrease in free amino content, but an increase in total phenolic content. Whey protein modified with 5% OTA showed the highest total phenolic content and the lowest free amino content. Modification of whey protein with OTA and OGA resulted in a loss of surface hydrophobicity in contrast to whey protein modified with OFA. However, no significant difference in surface activity including foam and emulsion properties in the whey protein with/without modification was observed. The modified whey protein had an increase in antioxidant activity when compared with that of the control.
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Lee, Hyun Jung, Shufang Li, Kejia Gu, and Dojin Ryu. "Reduction of Ochratoxin A during the Preparation of Porridge with Sodium Bicarbonate and Fructose." Toxins 13, no. 3 (March 19, 2021): 224. http://dx.doi.org/10.3390/toxins13030224.

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Ochratoxin A (OTA) is a potential human carcinogen that poses a significant concern in food safety and public health. OTA has been found in a wide variety of agricultural commodities, including cereal grains. This study investigated the reduction of OTA during the preparation of rice- and oat-based porridge by a simulated indirect steam process. The effects of sodium bicarbonate (NaHCO3) and fructose on the reduction of OTA were also investigated. During the processing, OTA in rice- and oat-porridge was decreased by 59% and 14%, respectively, from initial OTA artificially added at 20 μg/kg (dry weight basis). When 0.5% and 1% of sodium bicarbonate were added to rice porridge, increased reduction of OTA was observed as 78% and 68%, respectively. The same amounts of added sodium bicarbonate also further reduced OTA in oat porridge to 58% and 72%, respectively. In addition, increased reduction of OTA in the presence of fructose was observed. A combination of the two, i.e., 0.5% sodium bicarbonate and 0.5% fructose, resulted in a 79% and 67% reduction in rice porridge and oat porridge, respectively. These results indicate that indirect steaming may effectively reduce OTA in preparation of porridge-type products, particularly when sodium bicarbonate and/or fructose are added.
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Wang, Yaosong, and Youling L. Xiong. "Physicochemical and Microstructural Characterization of Whey Protein Films Formed with Oxidized Ferulic/Tannic Acids." Foods 10, no. 7 (July 9, 2021): 1599. http://dx.doi.org/10.3390/foods10071599.

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Protein-based biodegradable packaging films are of environmental significance. The effect of oxidized ferulic acid (OFA)/tannic acid (OTA) on the crosslinking and film-forming properties of whey protein isolate (WPI) was investigated. Both of the oxidized acids induced protein oxidation and promoted WPI crosslinking through the actions of quinone carbonyl and protein sulfhydryl, and amino groups. OTA enhanced the tensile strength (from 4.5 MPa to max 6.7 MPa) and stiffness (from 215 MPa to max 376 MPa) of the WPI film, whereas OFA significantly increased the elongation at break. The water absorption capability and heat resistance of the films were greatly improved by the addition of OTA. Due to the original color of OTA, the incorporation of OTA significantly reduced light transmittance of the WPI film (λ 200–600 nm) as well as the transparency, whereas no significant changes were induced by the OFA treatment. Higher concentrations of OTA reduced the in vitro digestibility of the WPI film, while the addition of OFA had no significant effect. Overall, these two oxidized polyphenols promoted the crosslinking of WPI and modified the film properties, with OTA showing an overall stronger efficacy than OFA due to more functional groups available.
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DHUNGANA, BANDANA, SHAUKAT ALI, EMMANUEL BYAMUKAMA, PADMANABAN KRISHNAN, and MELANIE CAFFE-TREML. "Incidence of Penicillium verrucosum in Grain Samples from Oat Varieties Commonly Grown in South Dakota." Journal of Food Protection 81, no. 6 (May 3, 2018): 898–902. http://dx.doi.org/10.4315/0362-028x.jfp-17-386.

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ABSTRACT Ochratoxin A (OTA) can cause toxicogenic effects in humans and animals when contaminated food products are consumed. Oat (Avena sativa), like any other cereal grain, can be contaminated with OTA when storage conditions are favorable for fungal growth and toxin production. South Dakota is among the leading oat-producing states in the United States. It is therefore important to determine the frequency of occurrence of the primary OTA-producing fungal species on oat grains produced in the state. In this study, we evaluated oat grain samples from South Dakota for the incidence of Penicillium verrucosum, the major ochratoxigenic fungus in temperate regions. Kernels from 12 oat cultivars grown at multiple locations in South Dakota from 2014 to 2016 (15 location-year combinations) were plated on dichloran yeast extract sucrose glycerol agar medium. P. verrucosum was detected on 0.30, 0.19, and 0.05% of the kernels tested in 2014, 2015, and 2016, respectively. Overall, 22 of the 360 evaluated samples had kernels contaminated with P. verrucosum. The fungal incidence of the contaminated samples ranged from 1 to 16%, and the majority of those samples originated from one location. All samples from 2014 and 2015 (n = 240), except two, had no detectable levels of OTA. The concentration of OTA was well under the maximum limit recommended by the European Union for the two samples with detectable levels of OTA.
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Cappozzo, Jack, Lauren Jackson, Hyun Jung Lee, Wei Zhou, Fadwa Al-Taher, Jerry Zweigenbaum, and Dojin Ryu. "Occurrence of Ochratoxin A in Infant Foods in the United States." Journal of Food Protection 80, no. 2 (January 23, 2017): 251–56. http://dx.doi.org/10.4315/0362-028x.jfp-16-339.

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ABSTRACTOchratoxin A (OTA) is a possible human carcinogen and occurs frequently in cereal grain, soy, and other agricultural commodities. Infants and young children may be more susceptible to contaminants than adults because of their lower body weight, higher metabolic rate, reduced ability to detoxify food toxicants, and more restricted diet. The purpose of this study was to investigate the occurrence and levels of OTA in infant formula and infant cereal products available in the U.S. market. In the present study, 98 powdered infant formula (milk- and soy-based) samples and 155 infant cereal (barley-, rice-, oat-, wheat-, and mixed grain–based) products were collected from different retail locations in the United States over a 2-year period. OTA levels were determined by liquid chromatography–tandem mass spectrometry. Although OTA was not detected in any of the infant formula samples, 47 (30%) of 155 infant cereals were contaminated with OTA in the range of 0.6 to 22.1 ng/g. At present, there is no regulatory limit for OTA in the United States. However, all of the positive samples were above the maximum level set by the European Commission (0.5 ng/g) for OTA in baby foods. OTA was detected in all types of infant cereals, but the highest incidence and concentrations were found in oat-based infant cereals (59%), followed by mixed grain cereals (34%). Increased surveillance and monitoring of OTA levels in grains used in infant foods may be needed to reduce exposure of infants and young children to OTA from cereal products.
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Nguyen, Kieu Thi Ngoc, and Dojin Ryu. "Ultrasonic Extraction with Ultra-Performance Liquid Chromatography/Tandem Mass Spectrometry for the Determination of Ochratoxin A in Processed Cereal Products." Journal of AOAC INTERNATIONAL 97, no. 5 (September 1, 2014): 1384–86. http://dx.doi.org/10.5740/jaoacint.13-425.

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Abstract A rapid, simple, and reliable method using ultra-performance LC/MS/MS (UPLC/MS/MS) was developed for determination of ochratoxin A (OTA) in processed cereal products. OTA was ultrasonically extracted from the sample with acetonitrile–water (80 + 20, v/v), and the extract was then injected into the UPLC/MS/MS system after filtration. The calibration curves had good linearity with coefficients of determination greater than 0.999. Recoveries of OTA were in the range of 90–104%. LOD and LOQ of OTA in samples were 0.6 and 2.0 ng/g, respectively, and no significant matrix effect was found. This method was applied to determine OTA in 25 oat-based cereal samples. OTA was detected in five samples (20%) in the range of 2.4 to 7.3 ng/g.
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Lee, Hyun Jung, Samjhana Dahal, Enrique Garcia Perez, Ryan Joseph Kowalski, Girish M. Ganjyal, and Dojin Ryu. "Reduction of Ochratoxin A in Oat Flakes by Twin-Screw Extrusion Processing." Journal of Food Protection 80, no. 10 (August 30, 2017): 1628–34. http://dx.doi.org/10.4315/0362-028x.jfp-16-559.

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ABSTRACT Ochratoxin A (OTA) is one of the most important mycotoxins owing to its widespread occurrence and toxicity, including nephrotoxicity and potential carcinogenicity to humans. OTA has been detected in a wide range of agricultural commodities, including cereal grains and their processed products. In particular, oat-based products show a higher incidence and level of contamination. Extrusion cooking is widely used in the manufacturing of breakfast cereals and snacks and may reduce mycotoxins to varying degrees. Hence, the effects of extrusion cooking on the stability of OTA in spiked (100 μg/kg) oat flake was investigated by using a laboratory-scale twin-screw extruder with a central composite design. Factors examined were moisture content (20, 25, and 30% dry weight basis), temperature (140, 160, and 180°C), screw speed (150, 200, and 250 rpm), and die size (1.5, 2, and 3 mm). Both nonextruded and extruded samples were analyzed for reductions of OTA by high-performance liquid chromatography, coupled with fluorescence detection. The percentage of reductions in OTA in the contaminated oat flakes upon extrusion processing were in the range of 0 to 28%. OTA was partially stable during extrusion, with only screw speed and die size having significant effect on reduction (P < 0.005). The highest reduction of 28% was achieved at 180°C, 20% moisture, 250 rpm screw speed, and a 3-mm die with 193 kJ/kg specific mechanical energy. According to the central composite design analyses, up to 28% of OTA can be reduced by a combination of 162°C, 30% moisture, and 221 rpm, with a 3-mm die.
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Boltaeva, Mokhichekhra, and Olimjon Ortikov. "Sharq mutafakkirlarining ota – onalarning bolaga munosabatiga oid ilmiy merosining o‘ziga hos jihatlari." Общество и инновации 2, no. 2/S (March 27, 2021): 470–74. http://dx.doi.org/10.47689/2181-1415-vol2-iss2/s-pp481-486.

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Mazkur maqolada oilada ota-ona va bolaning o‘zaro munosabatlari xaqida ko‘rib chiqilgan. Maqolada bola tarbiyasida Sharq mutafakkirlarning o‘z asarlaridagi qimmatbaho fikrlari va ularning xozirgi kundagi ota-onalarning farzand tarbiyasida aynan qaysi jihatlarga e’tibor qaratish kerakligi kabi masalalar tavsiflanadi.
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Komilova, Aziza. "Роль родителей в подготовке молодежи к семейной жизни." Общество и инновации 2, no. 10/S (December 9, 2021): 437–41. http://dx.doi.org/10.47689/2181-1415-vol2-iss10/s-pp437-441.

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Ushbu maqolada oilaviy hayotga kattalarni va yoshlarni o‘rgatish, ularda sog‘lom munosabatlar psixologiyasini shakllantirish, ota-onadagi madaniyat, ma’naviyat, iste’dod, mas’uliyatning o‘g‘il-qizlarda namoyon bo‘lishi, bolalardagi o‘zgarish, intilish, qiziqish ota-ona tomonidan nazorat qilinishi, oilada bola shaxsini shakllantirish, ularni oilaviy hayotga tayyorlash bo‘yicha ma’lumotlar berilgan.
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Ferrara, Massimo, Giancarlo Perrone, Lucia Gambacorta, Filomena Epifani, Michele Solfrizzo, and Antonia Gallo. "Identification of a Halogenase Involved in the Biosynthesis of Ochratoxin A in Aspergillus carbonarius." Applied and Environmental Microbiology 82, no. 18 (July 15, 2016): 5631–41. http://dx.doi.org/10.1128/aem.01209-16.

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ABSTRACTAspergillus carbonariusis the main responsible fungus of ochratoxin A (OTA) contamination of grapes and derived products. To date, the biosynthetic mechanism of this mycotoxin has been partially elucidated. Availability of genome sequence ofA. carbonariushas allowed the identification of a putative gene cluster involved in OTA biosynthesis. This region hosts the previously characterizedAcOTAnrpsandAcOTApksgenes encoding two key enzymes of the biosynthetic pathway. At about 4,400 nucleotides downstream of these loci, a gene encoding a putative flavin dependent-halogenase came out from the annotation data. Its proximity to OTA biosynthetic genes and its sequence analysis have suggested a role in the biosynthesis of OTA, directed to the introduction of the chlorine atom in the C-5 position of the final molecular structure of this mycotoxin. The deduced protein sequence of the halogenase gene, we designatedAcOTAhal, shows a high similarity to a halogenase that is located in the OTA cluster ofA. niger. The deletion of the halogenase gene completely eliminated the production of ochratoxin A inA. carbonariusand determined a significant increase of ochratoxin B, as confirmed by mass spectrometry analysis. Moreover, its expression profile was similar to the two biosynthetic genes previously identified,AcOTApksandAcOTAnrps, indicating a strong correlation of theAcOTAhalgene with the kinetics of OTA accumulation inA. carbonarius.Therefore, experimental evidence confirmed that the chlorination step which converts OTB in OTA represents the final stage of the biosynthetic pathway, supporting our earlier hypothesis on the order of enzymatic steps of OTA biosynthesis inA. carbonarius.IMPORTANCEOchratoxin A is a potent mycotoxin classified as a possible carcinogen for humans, andAspergillus carbonariusis the main agent responsible for OTA accumulation in grapes. We demonstrate here that a flavin-halogenase is implicated in the biosynthesis of OTA inA. carbonarius. The encoding gene,AcOTAhal, is contiguous to biosynthetic genes that we have already described (nrpsandpks), resulting as part of the biosynthetic cluster. The encoded protein is responsible of the introduction of chlorine atom in the final molecular structure and acts at the last step in the pathway. This study can be considered a continuation of an earlier study wherein we started to clarify the molecular basis of OTA biosynthesis inA. carbonarius, which has not been completely elucidated until now. This research represents an important step forward to a better understanding of the production mechanism, which will contribute to the development of improved control strategies to reduce the risk of OTA contamination in food products.
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Dissertations / Theses on the topic "Ota"

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Almerud, Eva-Kersti. "Ota Pavels sagovärld : Biografiska, narratologiska och språkliga perspektiv på Ota Pavels författarskap." Licentiate thesis, Stockholms universitet, Slaviska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-111802.

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Abstract The present dissertation analyzes the role of the fairy tale in the literary works of the Czech author Ota Pavel. Ota Pavel (1930–1973) started as a sports reporter and later became a popular and esteemed writer of fiction, mainly short stories. His works have been translated to many languages, among them Swedish. The study consists of a biographical reading of Ota Pavel’s texts and a discussion of the function of the fairy tale in his stories. My analysis of his literary development and use of various prose elements is based on narratological theories of the fairy tale – Karel Čapek’s motifs and fairytale characters, Gérard Genette’s paratexts and Vladimir Propp’s functions and dramatis personae – and includes remarks on the function of diminutives, etc. Ota Pavel is also viewed in the context of the literary landscape of his time – the 1960s and 1970s – and the reception of his work is discussed. Pavel’s stories contain a number of characteristic features which together form his unique style: direct allusions and references to fairy tales--for example, fairies and witches – and the linguistic markers and distinctive use of the narrator’s voice. One of the most common characters in Ota Pavel’s work is the hero, who, often with the assistance of magical objects or supernatural helpers, defeats supernatural antagonists or solves impossible tasks. Developing and growing as he – the hero is usually male–strives toward his goal, Pavel’s protagonist struggles not with dragons and giants, but with himself and his own difficulties and misfortunes. Earlier research refers to Ota Pavel’s two “genres”: sports prose and retrospective, or “memory” prose. This study shows that the boundary between the two is fluid, and that all Pavel’s work might be called memory prose. The title of this thesis – Ota Pavels sagovärld (The Fairytale World of Ota Pavel) – indicates the perspective from which the subject is approached. On the one hand, it alludes to the influence of the fairy tale on Pavel’s work, while on the other it points to the fact that his own life was such that he sometimes needed to retreat into a fantasy world of his own. Keywords: Tjeckisk litteratur, saga, Ota Pavel, narratologi, Tjeckoslovakien
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Castellanos, Onorio Olaya Pirene. "Estudio de la estabilidad termica de la ocratoxina a durante el tostado del café (Coffea arabica)." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20033.

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L'ochratoxine A (OTA) est un métabolite secondaire produit par des espèces appartenant aux genres Aspergillus et Penicillium qui a été liée à certaines conditions avec des effets néphrotoxiques, immunotoxiques, tératogènes et cancérogènes. La présence d'OTA dans le café vert a été détectée depuis 1974 et sa transmission à la boisson a été mise en évidence en 1989. La torréfaction du café est un procédé thermique qui peut avoir un effet sur la teneur en OTA, avant 1988, on pensait que l'OTA était détruite pendant la torréfaction, mais après plusieurs chercher sont des résultats contradictoires publiés dans % de réduction (de 0 à 100%). Plusieurs auteurs émis les hypothèses suivantes pour expliquer cette réduction : Isomérisation de la toxine dans la position C3 formant un diastéréoisomère moins toxique (Studer-Rohr et al, 1995 et Bruinink et al, 1997), protection de la dégradation d’OTA par l'humidité du grain (Boudra et al 1995; Blanc et al, 1998 et Stegen et al, 2001.), existence de réactions avec le café toxine parent ou réarrangements de la molécule OTA à températures de torréfaction (Suarez-Quiroz et al, 2005). Une autre étude sur la dégradation thermique de OTA pure a montré la formation de deux composés moins toxiques, 14-(R)-ochratoxine A et de la 14-descarboxi-ochratoxine A (Cramer et al, 2008). Parce qu'il n'y a pas de données concluantes sur l'effet de la torréfaction sur l'OTA dans le grain et le besoin de bases scientifiques pour établir des règles pour l'exportation de café vert, l'objectif de ce travail était d'étudier l'impact des différents types de torréfaction sur la stabilité thermique de l'OTA dans le café et l'élucidation chimique des produits de transformation. Deux niveaux de contamination ont été obtenus à partir de café contaminés artificiellement par Aspergillus westerdijkiae (5,3 et 57,2 ppb d'OTA). Ces lots sont grillés à 230° en utilisant deux méthodes : La torréfaction à tambour (TR) et à lit fluidisé (LF). Les échantillons ont été prélevés toutes les 3 min pour TR et chaque min 0,9 pour LF pour quantifier la valeur résiduelle d¡¯OTA. Les résultats ont montré que le procédé de torréfaction par TR (plus lent) était plus efficace que la FL dans l'élimination de l'OTA (67% et 36%, respectivement, pour une torréfaction moyenne). Nous avons déterminé le taux de dégradation thermique de OTA pure et de l'OTA mélangée avec les composants du café (5 sucres, 3 acides aminés, la caféine et les acides chlorogéniques), montrant que les interactions se déroulent en fonction des conditions de pH et de pKa des composants testés, dans ce cas, en influant sur la réactivité et la vitesse de dégradation de l'OTA. Un produit de transformation (PT) a été observé sur les chromatogrammes obtenus à partir de l'interaction de l'OTA avec les composants du café. Des tests d'alcalinisation et de chauffage de OTA pure ont confirmé que le PT provient de la modification structurale de la molécule d'OTA et n’est pas un produit de l'interaction avec les composants naturels du café. L'effet du pH et de la température sur l'extraction de l'OTA dans le café contaminé a été testé dans ce travail, les résultats ont montré une plus grande extraction de la toxine à un pH de 8,5 et 6°. Au même pH à 20° il y avait une plus importante formation d'un produit de transformation. Le PT a été purifié pour mener à bien sa caractérisation chimique. La nature chimique du produit de transformation, les données spectroscopiques telles que celles obtenus sous UV-Vis (max: 237nm), l'affinité avec la phase mobile de l'OTA, l'analyse de l'alcalinisation (phénomène de régénération de l'OTA et PT), l'analyse d’isotopes stables (SIDA’s) et le spectre de masse (ion moléculaire M+1: 420 m/z), suggèrent que la structure de le PT d'OTA durant le processus de torréfaction correspond à un analogue de l'OTA qui conserve son groupe carboxyle acide et conformément à la fragmentation correspond à la Hydroxy-ochratoxine A (OH-OTA), avec des quantités mineures d’ OTA et de ses isomères
Ochratoxin A (OTA) is a secondary metabolite produced by species belonging to the genera Aspergillus and Penicillium and this toxin has been associated with certain illnesses within nephrotoxic effects, immunotoxic, teratogenic and carcinogenic. The presence of OTA in green coffee was detected in 1974 and its transmission into the beverage was made evident in 1989. Roasting coffee is a thermal process that have an effect on the OTA content. Before 1988 it was thought that the OTA was destroyed during roasting, but after several investigations, results published are contradictory results published in the % reduction (from 0 to 100%). Several authors have established hypothesis that try explain this reduction: Isomerization of the toxin in the C3 position forming a less toxic diastereomers (Studer-Rohr et al., 1995 and Bruinink et al., 1997), Protection of grain moisture degradation OTA (Boudra et al., 1995; Blanc et al., 1998 and Stegen et al., 2001), Existence of reactions with the parent toxin coffee or rearrangements of the OTA molecule roasting temperatures (200¡ã and 250¡ãC) (Su¨¢rez-Quiroz et al., 2005). Another study on thermal degradation of pure OTA showed the formation of two less toxic compounds 14 - (R)-ochratoxin A and the 14-descarboxi-Ochratoxin A (Cramer et al., 2008).Because there are no conclusive data regarding the effect of roasting on OTA in grain and the need for scientific bases for establishing regulations for export of green coffee, the objective of this work was to study the impact of different types of roasting on the thermal stability of OTA in coffee and chemical elucidation of the transformation products.Two levels of contamination were obtained by the contamination of coffee with a strain of A. westerdijkiae (5.3 and 57.2 ppb of OTA). These lots were roasted at 230 ¡ã C using two methods: Drum rotation (TR) and fluidized bed (LF). Samples were taken every 3 min from TR and every 0.9 min for LF to quantify the residual OTA. The results showed that in roasting process by TR (slower), it was more effective than with LF in the elimination of OTA (67% and 36%, respectively, for a medium roast). The thermal degradation rate of pure OTA and of OTA mixed with the components of coffee (5 sugars, 3 amino acids, caffeine and chlorogenic acids), were determined, showing that interactions took place dependent themselves on the conditions of pH and pKa values of the components tested, in this case by influencing by the reactivity and the rate of degradation of OTA. A transformation product (TP) was observed in the chromatograms obtained from the interaction of OTA with the components of coffee. A test of alkalinization and warming of pure OTA confirmed that the TP comes from the structural modification of the OTA molecule and is not a product of interaction with the natural components of coffee. The pH and temperature showed an effect in extraction of OTA in contaminated coffee, the results show better extraction of the toxin at pH 8.5 at 60 ¡ãC. At the same pH at 20 ¡ãC, it was shown a greater formation of the transformation product.The TP was purified to carry out its chemical characterization. The chemical nature of compound transformation and spectroscopic data such as UV-Vis (¦Ëmax: 237nm), the affinity with the mobile phase of the OTA, the analysis of alkalinization (OTA regeneration phenomenon and TP) analysis of stable isotopes (SIDA's) and the mass spectrum (molecular ion M +: 420 m / z), suggest that structurally the TP of OTA during the roasting process corresponds to an analogue of OTA which retains its acidic carboxyl group and in accordance to fragmentation corresponds to the Hydroxi- Ochratoxin A (OH-OTA), as well as minor amounts of OTA and its isomers
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Arnold, Matthew David. "Optimization Methods for a Reconfigurable OTA Chamber." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6733.

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Multiple-input multiple-output (MIMO) technology has enabled increased performance of wireless communication devices. The increased complexity associated with MIMO devices requires more realistic testing environments to ensure device performance. This testing can be accomplished by either very accurate but expensive anechoic chambers, less accurate but inexpensive mode-stirred chambers, or the newly introduced reconfigurable over-the-air chamber (ROTAC) that combines the benefits of both anechoic chambers and reverberation chambers. This work focuses on efficient optimization methods to quantify the performance of the ROTAC. First, an efficient optimization technique that combines convex optimization and a simple gradient descent algorithm is developed that can be applied to different ROTAC performance metrics. Plane wave synthesis is used to benchmark performance versus chamber complexity, where the complexity is defined in terms of chamber size and the number of ports in the chamber. Next, the optimization technique is used to study the spatial channel characteristics (power angular spectrum) of the chamber and the generation of arbitrary fading statistics inside the chamber. Lastly, simulation results are compared with practical hardware measurements to highlight the accuracy of the simulation model for the chamber. Overall, this work provides a comprehensive analysis for optimization of different ROTAC performance metrics.
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Volpe, Nathalie. "Naevus d'ota : a propos de deux cas ; revue de la litterature." Aix-Marseille 2, 1992. http://www.theses.fr/1992AIX20004.

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5

Ishikawa, Angélica Tieme. "Hibridoma OTA.1 : anticorpo anti-OTA no desenvolvimento da coluna de imunoafinidade e aplicação associada à qualidade e segurança de vinho." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Ciência de Alimentos, 2012. http://www.bibliotecadigital.uel.br/document/?code=vtls000183300.

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O consumo moderado de vinho é recomendado baseado em efeito benéfico à saúde especialmente contra radicais livres, destaque ao resveratrol. O monitoramento na cadeia produtiva de vinho deve ser executado por método rápido, sensível e específico, evitando contaminação por ocratoxina A (OTA). Considerando o emprego de bioferramentas, com destaque a coluna de imunoafinidade (CIA) na extração/concentração do analito de interesse e o ELISA (Enzyme-linked Immunosorbent Assay), como base para avanço tecnológico, a exemplo de biossensor, procedeu-se o cultivo de Hibridoma OTA.1 produtor de anticorpo monoclonal (AcM) anti-OTA. O cultivo de Hibridoma OTA.1 foi iniciado em meio RPMI 1640 suplementado com Soro Fetal Bovino (SFB) e L-glutamina, a 37 °C sob 5% CO2, e gradualmente substituído por meio Hibridoma-Serum Free Medium (H-SFM) nas proporções 15, 30, 50, 75, 80 e 100%. O enriquecimento com 7 mmol L-1 de L-glutamina e cuidado especial em etapa inicial de cultivo, propiciou adaptação e expansão celular. O AcM obtido foi precipitado com sulfato de amônio a 60 % de saturação, dialisado e empregado na confecção de 6 CIAs experimentais, imobilizando 5 mg de AcM 100 % H-SFM (CIA 1 e 2); 75:100 % H-SFM (1:1) (CIA 3, 4 e 5) e 75% H-SFM (CIA 6) em um mL de suporte Affi-gel 10, com modificações na metodologia padrão. A Taxa de imobilização variou de 77,43±6,39 a 97,55±0,24 %, sendo a CIA 6 desenvolvida com AcM 75 % de H-SFM dialisado em PBS 0,015 mol L-1, com acoplamento a 4 ºC/24 h, apresentou alta atividade anti-OTA por i-ELISA, sugerindo que proteínas inerentes ao próprio cultivo favoreceram a imobilização de AcM. Em paralelo, vinho argentino elaborado a partir de Vitis vinifera (n=26), bem como o vinho paranaense, de Vitis Labrusca- Bordô (n=34), foram avaliados perante contaminação de OTA por Cromatografia Líquida de Alta Eficiência (CLAE, Limite de detecção- LD =0,05 ng mL-1 e Limite de quantificaçao - LQ= 0,07 ng mL-1) e ELISA competitivo indireto (ic-ELISA, LD= 0,17 ng mL-1 e LQ= 0,32 ng mL-1); além de característica de qualidade avaliada por capacidade antioxidante (CAO), trans-resveratrol e parâmetros cromáticos (L*-luminosidade, C*-croma e hgraus -tonalidade cromática) foram analisados em 60 amostras. Apenas uma amostra (0,12 ±0,01 ng mL-1) apresentou contaminação de OTA por CLAE, e 11 por ic-ELISA, com nível de contaminação abaixo do limite estabelecido pela legislação brasileira e Comunidade Européia (2 ng mL-1). A detecção falso-positivo de OTA por ic-ELISA foi explicado pela relação de trans-resveratrol e OTA (Análise de Componentes Principais -ACP), mostrando interferência de matriz. O vinho elaborado com Bordô apresentou média de CAO 4,57 mmol L-1, enquanto o vinho elaborado com V. vinifera, 8,35 mmol L-1. O trans-resveratrol foi detectado em 57 amostras de 60, sendo o nível em vinho Argentino (1,35 mg L-1) mais baixo em relação ao vinho Bordô (3,33 mg L-1) (p<0,05). O vinho de Paraná apresentou maior luminosidade em relação ao argentino, i.e., cor mais clara, entretanto valores de croma e tonalidade cromática não diferiram estatisticamente (p>0,05). Os vinhos sul-americanos mostraram perfil interessante apresentando níveis alto de antioxidante e baixa contaminação por OTA. Por outro lado, nível elevado de trans-resveratrol atuou como interferente em ic-ELISA resultando em falso-positivo, o conhecimento dessa influência permitirá aperfeiçoar o emprego dessa bioferramenta sensível aplicado ao vinho.
Moderate consumption of wine is recommend based on beneficial effect on health, with emphasis on resveratrol against free radical. The monitoring of wine in the production chain should be performed by rapid, sensitive and specific method, avoiding contamination by ochratoxin A (OTA). Whereas the use of biotools, specially the immunoaffinity column (IAC) in the extraction/concentration of the analyte of interest and ELISA (Enzyme-linked Immunosorbent Assay), as a basis for technological advanced, such biosensor, we proceeded to the Hybridoma OTA.1 cultivation producing monoclonal antibody (mAb) anti-OTA. The Hybridoma OTA.1 cultivation was started in RPMI 1640 medium supplemented with Fetal Bovine Serum (FBS) and L-glutamine at 37 ºC with 5 % CO2, and gradually replaced by 15, 30, 50, 75, 80 and 100 % of Hybridoma-Serum Free Medium (H-SFM). The enrichment with 7 m mol L-1 L-glutmine in initial stage cultivation promoted adaptation and cell expansion. The mAbs obtained was precipitated with ammoniun sulfate at 60 % saturation, dialyzed and used in the confection of 6 experimental IACs with 5 mg of Mab 100 % (IAC 1 and 2); 75:100 % (IAC 3,4 and 5) and 75 % H-SFM (IAC 6) on one mL of Affil-gel 10, with modification in standard methodology. The rate of immobilization ranged from 77.43 ± 6.39 to 97.55± 0.24 %, the developed IAC 6 prepared with mAb produced in 75 % H-SFM, dialyzed in 0.015 mol L-1 PBS, with coupling step performed at 4 ºC/24 h, showed higher performance concerning anti-OTA activity evaluated by indirect ELISA, suggesting that proteins involved on own cultivation probably favored the mAb immobilization. In parallel, the Argentinean wine produced with Vitis vinifera (n=26), as well as Paraná wine produced with Vitis labrusca- Bordeaux (n=34), were evaluated concerning OTA contamination by High Performance Liquid Chromatography (HPLC, Limit of detection - LD =0.05 ng mL-1 and Limit of quantification - LQ= 0.07 ng mL-1) and indirect competitive ELISA (ic-ELISA, LD= 0.17 ng mL-1 and LQ= 0.32 ng mL-1); also quality characteristic targeted on antioxidant capacity (AC), trans-resveratrol and chromatic parameter (L*- brightness, C*- chroma e hº- hue) were determinate a total of 60 samples. Only one sample (0.12 ±0.01 ng mL-1) showed OTA contamination by HPLC and 11 samples by ic-ELISA, with levels below the limit established by Brazilian legislation and European Community (2 ng mL-1). The OTA detection by ic-ELISA was explained with the relationship of trans-resveratrol and OTA (Principal Components Analysis -PCA), showing the influence of matrix interference. The Bordeaux wine showed AC mean of 4.57 mmol L-1, while the same profile analysis in V. vinifera showed mean of 8.35 mmol L-1. The trans-resveratrol was detected in 57 out of 60 samples, the Argentina wine samples (1.35 mg L-1) showed lower trans-resveratrol level than Bordeaux wine (3.33 mg L-1) (p<0,05). The Paraná wine showed higher brightness in relation to Argentinean wine, i.e., lighter color, however chroma and hue values did not differ statistically (p>0,05). The South-American wines showed interesting profile concerning high level of antioxidants in detriment to lower OTA contamination. On other hand, high trans-resveratrol level acted as interference in ic-ELISA resulting in false positive, knowledge of this influence will improve the use of the sensitive biotool.
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Kode, Praveena. "Design techniques for high intermediate frequency bandpass (sigma/delta) modulator." Texas A&M University, 2008. http://hdl.handle.net/1969.1/86025.

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The focus of the present thesis is the circuit-level implementation of an excess loop delay compensation scheme which optimizes excess loop delay in Analog-to-Digital Converter(ADC) by using a programmable delay block and synchronizes the signal passing through Dynamic Element Matching block, used to mitigate mismatch effects of multi-bit Digital-to-Analog Converter(DAC). The proposed delay block has tuning range of T/10 to T/2 seconds, with a step size of T/30 seconds, where T is the time period (1.25 nanoseconds) of sampling signal (800 MHz) in high IF (200 MHz) Bandpass [sigma delta] ADC. The implementation details of the element rotation scheme used to calibrate the multi-bit DAC static error mismatch are also presented. Also presented is the design of high frequency highly linear Operational Transconductance Amplifier(OTA) targeted for continuous-time filters in a high resolution High Intermediate Frequency (200 MHz) Bandpass [sigma delta] ADC for Software Radio applications. Proposed OTA uses super source follower input stage to enhance its voltage-to-current conversion linearity. The design has been simulated using TSMC 0.18 μm CMOS process. The OTA has small signal transconductance of 0.9 mA/V, IM3 below -79 dB (for 0.3 Vpp input), Signal-to-Noise Ratio of 82 dB and power consumption of 6.8 mW, when tested in unity gain configuration.
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Rajaram, Dinakaran. "Secure Over the Air (OTA) Management Of Mobile Applications." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-116693.

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The Thesis report analyzes the possibility to store the application inside a secure environment in over the air Environment. The report clearly explains the details about the attributes which are placed in the over the air application management. Different forms of secure elements and how it can be placed inside the secure micro SD card have been discussed. The report gives the clear idea about secure micro SD card architecture. The report describes the OTA (Over the Air) components, Roles and also the process to manage the applications in OTA environment. The report also gives the clear about the protocols ISO 7816-4 which is used to communicate the handset with secure micro SD card. The communication concepts like establishing secure channel between the handset and secure micro SD card also has been discussed. Moreover, secure channel attributes are also discussed. They are Creation session key, MAC Operation and generation of derivation data. Secure micro SD card API‘s are also discussed which is used to communicate with the secure micro SD card .Some of the implementation work has been done by this research. They are >Constructed the Design of Trusted Service Manager (TSM) and Service provider. >Implemented the Functionality of TSM Server (Download Function) and tested the Functionality whether the end terminal (Android Phone) has been able to use the function properly. >Established the secure channel between the Android phone and secure micro SD card. >Loaded the sample application inside the secure micro SD card.
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Ramachandran, Arun. "Nonlinearity and noise modeling of operational transconductance amplifiers for continuous time analog filters." Texas A&M University, 2003. http://hdl.handle.net/1969.1/3925.

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A general framework for performance optimization of continuous-time OTA-C (Operational Transconductance Amplifier-Capacitor) filters is proposed. Efficient procedures for evaluating nonlinear distortion and noise valid for any filter of arbitrary order are developed based on the matrix description of a general OTA-C filter model . Since these procedures use OTA macromodels, they can be used to obtain the results significantly faster than transistor-level simulation. In the case of transient analysis, the speed-up may be as much as three orders of magnitude without almost no loss of accuracy. This makes it possible to carry out direct numerical optimization of OTA-C filters with respect to important characteristics such as noise performance, THD, IM3, DR or SNR. On the other hand, the general OTA-C filter model allows us to apply matrix transforms that manipulate (rescale) filter element values and/or change topology without changing its transfer function. The above features are a basis to build automated optimization procedures for OTA-C filters. In particular, a systematic optimization procedure using equivalence transformations is proposed. The research also proposes suitable software implementations of the optimization process. The first part of the research proposes a general performance optimization procedure and to verify the process two application type examples are mentioned. An application example of the proposed approach to optimal block sequencing and gain distribution of 8th order cascade Butterworth filter (for two variants of OTA topologies) is given. Secondly the modeling tool is used to select the best suitable topology for a 5th order Bessel Low Pass Filter. Theoretical results are verified by comparing to transistor-level simulation withCADENCE. For the purpose of verification, the filters have also been fabricated in standard 0.5mm CMOS process. The second part of the research proposes a new linearization technique to improve the linearity of an OTA using an Active Error Feedforward technique. Most present day applications require very high linear circuits combined with low noise and low power consumption. An OTA based biquad filter has also been fabricated in 0.35mm CMOS process. The measurement results for the filter and the stand alone OTA have been discussed. The research focuses on these issues.
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Mellgren, Eleine, and Amanda Stolt. "Effektivare webbplatser : hur tar hotellen tillbaka kontrollen?" Thesis, Örebro universitet, Restaurang- och hotellhögskolan, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-51874.

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Su, Hsiao Wei. "Design and performance of high-frequency CMOS-OTA-C filters." Thesis, University of Hertfordshire, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251521.

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Books on the topic "Ota"

1

Liehn, Margret, Jens Köpcke, Heike Richter, and Leonid Kasakov, eds. OTA-Lehrbuch. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-56183-6.

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Liehn, Margret, Heike Richter, and Leonid Kasakov, eds. OTA-Lehrbuch. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41728-3.

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̇k, Jiř ̇. Kotal. Ota Janeček. Cardiff ((Cathays Park, Cardiff CF1 3NP)): Trefoil Books and the National Museum of Wales, with the assistance of the Visiting Arts Unit of Great Britain, for the Contemporary Arts Society for Wales, 1985.

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Milena, Šubrtová, and Dětský filmový a televizní festival Oty Hofmana v Ostrově (30th : 1998 : Ostrov, Karlovarský kraj, Czech Republic), eds. Ota Hofman. Boskovice: Albert, 1998.

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Hlaváček, Luboš. Ota Janeček. Praha: Odeon, 1989.

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Liehn, Margret, Heike Richter, and Leonid Kasakov, eds. OTA-Lehrbuch. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65996-0.

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Courths-Mahler, Hedwig. Blask z¿ota. Katowice: Akapit, 1993.

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Janeček, Ota. Ota Janeček, obrazy. Praha: Nibiru, 2003.

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Subḣon, Zhonibek. Ota makon: Sheʺrlar. Toshkent: Ghafur Ghulom nomidagi Nashriët-matbaa birlashmasi, 1991.

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Sauer, Traute, Jens Köpcke, and Mona Kuppe. OTA - Fragen und Antworten. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-58871-0.

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Book chapters on the topic "Ota"

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Zajac, Peter. "Pavel, Ota." In Kindlers Literatur Lexikon (KLL), 1. Stuttgart: J.B. Metzler, 2020. http://dx.doi.org/10.1007/978-3-476-05728-0_15658-1.

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Loose, André. "Interessenvertretung der OTA." In OTA-Lehrbuch, 687–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65996-0_47.

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Mohan, P. V. Ananda. "OTA-C Filters." In VLSI Analog Filters, 147–249. Boston, MA: Birkhäuser Boston, 2012. http://dx.doi.org/10.1007/978-0-8176-8358-0_3.

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Pascual-Castroviejo, Ignacio, and Martino Ruggieri. "Nevus of OTA." In Neurocutaneous Disorders Phakomatoses and Hamartoneoplastic Syndromes, 435–39. Vienna: Springer Vienna, 2008. http://dx.doi.org/10.1007/978-3-211-69500-5_21.

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Kotterman, Wim, Gert F. Pedersen, Istvan Szini, Wei Fan, Moray Rumney, Christoph Gagern, Werner L. Schroeder, and Per H. Lehne. "MIMO OTA Testing." In Cooperative Radio Communications for Green Smart Environments, 423–67. New York: River Publishers, 2022. http://dx.doi.org/10.1201/9781003337720-11.

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Richter, Heike, and Ralf Neiheiser. "Gesetzgebung der OTA-Ausbildung." In OTA-Lehrbuch, 3–6. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65996-0_1.

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Wiemann, Johan, Margret Liehn, and Helena Sperlich. "Hygiene." In OTA-Lehrbuch, 3–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41728-3_1.

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Liehn, Margret, and Nora Krischke-Ramaswamy. "Gefäß-, Thorax- und Kardiochirurgie." In OTA-Lehrbuch, 275–305. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41728-3_10.

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Havemann, Ulrike. "Gynäkologie und Mammachirurgie." In OTA-Lehrbuch, 307–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41728-3_11.

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Lengersdorf, Brigitte, and Annegret Nietz. "Urologie." In OTA-Lehrbuch, 327–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41728-3_12.

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Conference papers on the topic "Ota"

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Pavlakos, John, Neil Sparks, Florentino Barrientos, and Sung Choi. "ZAV-OTA (Secure-OTA) Software Demonstrator." In Proposed for presentation at the 2022 Auto-ISAC Cybersecurity Summit held September 7-8, 2022 in Dearborn, MI United States of America. US DOE, 2022. http://dx.doi.org/10.2172/2004491.

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Fu, Ximing, Kamal El-Sankary, and Yadong Yin. "A High-Performance OTA With Hybrid of Inverter-Based OTA and Nauta OTA For high Speed Applications." In 2021 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE, 2021. http://dx.doi.org/10.1109/iscas51556.2021.9401323.

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Rani, Nimeesha, and Vandana Niranjan. "Transconductance boosting of OTA." In 2018 International Conference on Advances in Computing, Communication Control and Networking (ICACCCN). IEEE, 2018. http://dx.doi.org/10.1109/icacccn.2018.8748327.

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Choi, Sung. "Secure OTA Firmware Update." In Proposed for presentation at the 2022 Auto-ISAC Cybersecurity Summit held September 7-8, 2022 in Dearborn, MI. US DOE, 2022. http://dx.doi.org/10.2172/2006385.

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Roungsan Chaisricharoen, Boonruk Chipipop, and Boonchareon Sirinaovakul. "A heuristic compensation of OTA-C bandpass biquad based on CMOS OTA." In TENCON 2007 - 2007 IEEE Region 10 Conference. IEEE, 2007. http://dx.doi.org/10.1109/tencon.2007.4429016.

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Liang Shen, Ning Li, and Shuo Wang. "Optimization on ZigBee OTA Technique." In 2016 IEEE Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC). IEEE, 2016. http://dx.doi.org/10.1109/imcec.2016.7867184.

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Kassimis, Chrisostomos, George Souliotis, and Costas Psychalinos. "OTA Based Frequency Tuning System." In 2007 14th IEEE International Conference on Electronics, Circuits and Systems (ICECS '07). IEEE, 2007. http://dx.doi.org/10.1109/icecs.2007.4511077.

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Yodtean, Apiradee. "A CMOS OTA and implementation." In 2014 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS). IEEE, 2014. http://dx.doi.org/10.1109/ispacs.2014.7024432.

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Arnold, Benjamin T., and Michael A. Jensen. "Reconfigurable OTA Chamber Design Optimization." In 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting. IEEE, 2019. http://dx.doi.org/10.1109/apusncursinrsm.2019.8889376.

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Mocanu, Manuela, Arcadie Cracan, and Liviu Goras. "OTA based piecewise linear conductance." In 2012 10th International Symposium on Electronics and Telecommunications (ISETC). IEEE, 2012. http://dx.doi.org/10.1109/isetc.2012.6408104.

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Reports on the topic "Ota"

1

Hiller, S. W. Open test assembly (OTA) shear demonstration testing work/test plan. Office of Scientific and Technical Information (OSTI), July 1998. http://dx.doi.org/10.2172/345055.

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Besal, Bob. Defense T&E and Acquisition: Making It Better - A Brief OTA Perspective. Fort Belvoir, VA: Defense Technical Information Center, March 2001. http://dx.doi.org/10.21236/ada385903.

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Stein, Joshua S., Yusuke Miyamoto, Eichi Nakashima, and Matthew Lave. Ota City : characterizing output variability from 553 homes with residential PV systems on a distribution feeder. Office of Scientific and Technical Information (OSTI), November 2011. http://dx.doi.org/10.2172/1035324.

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Spieß, C. Katharina, Elena Ziege, Ludovica Gambaro, and Mara Barschkett. Oma und Opa gefragt? Bundesinstitut für Bevölkerungsforschung (BiB), June 2022. http://dx.doi.org/10.12765/bro-2022-01.

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Die Publikation fasst die Ergebnisse eines zweijährigen Forschungsprojekts zusammen, das sich mit wichtigen Fragestellungen zu den Auswirkungen der Großelternbetreuung auf die kindliche Entwicklung beschäftigt.
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Fields, Michael J., Mordechai Shemesh, and Anna-Riitta Fuchs. Significance of Oxytocin and Oxytocin Receptors in Bovine Pregnancy. United States Department of Agriculture, August 1994. http://dx.doi.org/10.32747/1994.7568790.bard.

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Oxytocin has multiple actions in bovine reproductive tract and it was our purpose to determine the nature of these actions and their significance for the physiology of bovine reproduction. The bovine oxytocin receptors (OTR) gene was cloned and its expression studied during the cycle and pregnancy. OTR mRNA changed in parallel with OTR with control occurring mainly at the transcriptional level. However, the endocrine regulation of OTR were found in endometrium and cervical mucosa at estrus and at parturition. In both tissues OTR were suppressed in the luteal phase and early pregnancy. Whereas cervical OTR remained suppressed throughout pregnancy, endometrial OTR began to increase soon after implantation and reached higher concentrations in midpregnancy than at estrus. OTR in caruncles did not increase until third trimester, and OTR in cervical mucosa, cotyledons and fetal membranes increased only at term. Myometrial OTR showed less variation and OTR were present throughout the cycle and pregnancy but increased significantly during mid- and late pregnancy. OTR were localized in endometrial epithelial cells and lumina epithelial cells of cervical mucosa as determined by immunohistochemistry. Endometrial OTR were functional throughout pregnancy and mediated PGF release from day 50 onwards in a receptor density related manner. OTR in cervical mucosa mediated PGE release both in vivo and in vitro, as shown in cyclic cows. The ontogeny of uterine OTR was studied from third trimester fetal stage until puberty. OTR were present in endometrium and cervical mucosa in high concentrations throughout this period; myometrial OTR began to increase somewhat later but also reached adult values by 6-mo of age. In the prepuberal heifers OT injections failed to initiate PGF2a, release. The influence of steroids on the effect of OT was examined. Ovariectomy and E2 were without effect, but P4 with or without E2 induced a massive PGF2a release in response to OT in spite of reduced OTR. Bovine cyclooxygenases (COX-1 and COX-2) were cloned and their expression studied in the endometrium of prepuberal heifers and pregnant cows. Untreated and E2 treated prepuberal heifers did not express COX-2 but P4 treated heifers did express the mRNA for COX-2, albeit weakly. During the second half of pregnancy COX-2 mRNA was strongly expressed in cotyledons and somewhat less in caruncles, whereas endometrium, myometrium and cervical mucosa showed only weak, if any, COX-2 mRNA under basal conditions. However, 2 h after OT injection significant increases in COX-2 mRNA were found in endometrial RNA. Thus OT is capable of inducing the expression of the inducible COX-2 gene, and hence the conversion of arachidonic acid to prostanoids. The results indicate that the functions of OT are numerous and probably essential for successful pregnancy and parturition.
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Tamm, Kaidi, and Tiia Pedusaar. Planetaarsete piiride kontseptsioon. Ülevaade ja rakendamise väljavaated Eestis. Stockholm Environment Institute, February 2024. http://dx.doi.org/10.51414/sei2024.004.

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Töö annab ülevaate planetaarsete piiride raamistikuga seotud olulisematest teemadest ja nende rakendamise võimalustest Eestis. Ülevaade on eeluurimus Eesti taluvuspiiride panuse ehk “oma osa” arvutamise metoodika väljatöötamiseks juhul, kui tulevikus on akadeemiline, ühiskondlik ja poliitiline huvi selle raamistikuga jätkata ning seda rakendada Eesti keskkonnapoliitika kujundamisel.
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Durán Toledo, Diego. La segunda ola de COVID-19 y las políticas sociales: El Estado no puede abandonar otra vez a las personas. Universidad Autónoma de Chile, December 2020. http://dx.doi.org/10.32457/20.500.12728/9050202017.

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Las cifras entregadas por el Ministerio de Salud (MINSAL) el pasado 25 de diciembre, indican que, durante el lapso de 24 horas, se registraron un total de 2.520 casos a nivel nacional de personas contagiadas de COVID-19, lo cual representa el número más alto desde julio del presente año.
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Durán Toledo, Diego. La segunda ola de COVID-19 y las políticas sociales: El Estado no puede abandonar otra vez a las personas. Universidad Autónoma de Chile, December 2020. http://dx.doi.org/10.32457/20.500.12728/905020217.

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Abstract:
Las cifras entregadas por el Ministerio de Salud (MINSAL) el pasado 25 de diciembre, indican que, durante el lapso de 24 horas, se registraron un total de 2.520 casos a nivel nacional de personas contagiadas de COVID-19, lo cual representa el número más alto desde julio del presente año.
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9

Stanley, April Elisha. Catrìona. Ames: Iowa State University, Digital Repository, 2017. http://dx.doi.org/10.31274/itaa_proceedings-180814-268.

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10

Metz, C. OTP Extended Responses. RFC Editor, November 1997. http://dx.doi.org/10.17487/rfc2243.

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