ECO - FRIENDLY HEALTHY DRINKS CONSUMPTION TENDENCY OF VIETNAMESE YOUTH

Along with the rapid development of the world economy, young people's demand for drinks with organic ingredients, rich in minerals and healthy vitamins (healthy drinks) also changes increasingly. In the article, the research team conducted a survey focused on researching and collecting data on consuming healthy and environmentally friendly drinks among Vietnamese youth. The research results show some following notable issues: Young people tend to use healthy drinks in the direction of being quick and convenient but still ensuring nutritional content. The aspects that young people are most interested in when using healthy drinks are benefits, nutritional value, and concern for the environment. Healthy drinks have been popular in recent years, but there are still some young people who have never heard of healthy drinks or have known but have never used the product. In addition, the use of healthy drinks is mainly influenced by the benefits and prices, and the product's environmental friendliness. Research shows that the monthly amount spent on healthy drinks is only about 100-200 thousand VND, because young people, especially students, do not have high financial conditions

Application of the Fenton-like agent based on magnetic iron and manganese oxide in the degradation process of paracetamol in water

A Fenton-like catalyst MnO2-Fe3O4/SiO2 is synthesized via a two-step approach. The prepared composite has a mesoporous structure and a high surface area of 190 m2/g. The XRD pattern describes a specific peak of Fe3O4 magnetite on the baseline of amorphous silica. Furthermore, the FTIR spectra not only show the height assigned to stretching vibrations of Si-O-Si bonds, and Fe–O–Fe connections but also exhibit a small peak that matches the Mn–O bonds. SEM images exhibit a porous network structure of the composites with some holes among 30 – 100 nm clusters. The activity of the catalyst is determined in a paracetamol degradation as a Fenton oxidation. The paracetamol removal efficiency is at 85.6% with the optimal condition as initial pH 3, catalyst dosage of 0.15 g/50mL and H2O2 concentration of 1 mL/50 mL. In addition, the catalyst can be reused at least 5 times with a low reduction of the catalytic activity from 85.6% to 80.8%. The experiment results open a direction that has high efficiency in the treatment process of excess paracetamol in pharmacy wastewater

Application of the Fenton-like agent based on magnetic iron and manganese oxide in the degradation process of paracetamol in water

A Fenton-like catalyst MnO2-Fe3O4/SiO2 is synthesized via a two-step approach. The prepared composite has a mesoporous structure and a high surface area of 190 m2/g. The XRD pattern describes a specific peak of Fe3O4 magnetite on the baseline of amorphous silica. Furthermore, the FTIR spectra not only show the height assigned to stretching vibrations of Si-O-Si bonds, and Fe–O–Fe connections but also exhibit a small peak that matches the Mn–O bonds. SEM images exhibit a porous network structure of the composites with some holes among 30 – 100 nm clusters. The activity of the catalyst is determined in a paracetamol degradation as a Fenton oxidation. The paracetamol removal efficiency is at 85.6% with the optimal condition as initial pH 3, catalyst dosage of 0.15 g/50mL and H2O2 concentration of 1 mL/50 mL. In addition, the catalyst can be reused at least 5 times with a low reduction of the catalytic activity from 85.6% to 80.8%. The experiment results open a direction that has high efficiency in the treatment process of excess paracetamol in pharmacy wastewater

"Ich bin lesbisch"

Das Thema der Diplomarbeit behandelt die weibliche Homosexualität und dabei im besonderen den Coming-Out Prozess von lesbischen Frauen. In der Aufarbeitung unterschiedlichster Literatur sollen alle Aspekte einer homosexuellen Identität angesprochen werden. Das zentrale Thema der Arbeit, der Coming-Out Prozess von lesbischen Frauen und seine Darstellung in der Literatur wird ausführlicher beleuchtet. Es werden die verschiedenen Phasenmodelle des Coming-Out Prozesses, die in der Literatur existieren, präsentiert. Die eigentliche Leistung der Arbeit stellt die empirische Untersuchung dar. Es wurden neun lesbische Frauen zu ihrem individuellen Coming-Out interviewt. Dazu wurde im Vorfeld ein Interviewleitfaden erstellt, der bei der Erstellung der Annahmen sehr hilfreich war. Die Ergebnisse der Arbeit werden im Methodenkapitel eingehend gezeigt. Von erheblicher Bedeutung war auch der Anspruch zwei Phasenmodelle der Literatur mit den Erfahrungen der befragten Frauen in Beziehung/ Vergleich auf Ähnlichkeiten und Unterschiede zu setzen. Im abschließenden Teil der Arbeit wird versucht die Forschungsfrage zu beantworten und die Forschungsannahmen zu beleuchten.The main issue of the thesis is the female homosexuality and in particular the coming-out process of lesbian women. First of all, the intention was to illustrate different literature concerning all aspects of a homosexual identity. The coming out process of lesbian women and how it shows up in literature is described in detail. Different phase models of the coming out process are exemplified. The essential focus in the thesis is the empirical study about the lesbian women. Previously nine women were interviewed to their individual process of coming out. The results of the empirical analysis are discussed in the subsequently chapter. It was of importance to compare the phase models in the literature with the personal experiences of the women. Finally, the presuppositions and the common questions that were mentioned in the thesis will be answered

Experimental and modelling investigate on the behaviour of a partially saturated mine chalk

International audienceDue to seasonal environmental changes (i.e. water table, hygrometry) the pillars of mines in chalk are often submitted to variations of the degree of water saturation. These changes could affect the short and long term stability of pillars in the underground quarries. Experimental investigations have been conducted on saturated, partially saturated and dry chalk. In this context, the concepts and the methods of mechanics unsaturated soils have been applied to partially saturated chalks. Water retention properties and a series of high pressure controlled suction odometer compression tests were carried out on the samples of the chalk from the pillars of the abandoned Estreux mine (France). These results show that the yield stress of chalk increases when the water saturation decreases. They have been simulated by means of the Barcelona Basic Model - BBM (Alonso et al., 1990) allowing to account the swelling and collapse under wetting at constant vertical loadEn raison du changement saisonnier environnemental (i.e. niveau d'eau, hygrométrie), les piliers des carrières sont soumis régulièrement aux variations du degré de saturation. Ces changements ont donc une grande influence sur la stabilité des piliers à court terme et aussi à long terme dans les carrières souterraines. Des investigations expérimentales ont été menées sur la craie saturée, non saturée et sèche. Dans ce contexte, les concepts et les méthodes de sols non saturés ont été appliquées pour ces études. Les caractéristiques de rétention de la craie et une série d'essais d'oedomètre haute pression à succion contrôlée ont été réalisés. La craie est prélevée des piliers dans la carrière abandonnée d'Estreux (France). Les résultats montrent que la surface de charge se développe lors de la diminution de saturation. Ils ont été simulés par le modèle de Barcelone - BBM (Alonso et al, 1990) permettant de rendre compte de l'effondrement et aussi du gonflement sous remouillage avec une charge constant

Well-Rounded ideal lattices of cyclic cubic and quartic fields

In this paper, we find criteria for when cyclic cubic and cyclic quartic fields have well-rounded ideal lattices. We show that every cyclic cubic field has at least one well-rounded ideal. We also prove that there exist families of cyclic quartic fields which have well-rounded ideals and explicitly construct their minimal bases. In addition, for a given prime number $p$, if a cyclic quartic field has a unique prime ideal above $p$, then we provide the necessary and sufficient conditions for that ideal to be well-rounded. Moreover, in cyclic quartic fields, we provide the prime decomposition of all odd prime numbers and construct an explicit integral basis for every prime ideal.Comment: 26 page

Well-Rounded Twists of Ideal Lattices from Imaginary Quadratic Fields

In this paper, we investigate the properties of well-rounded twists of a given ideal lattice of an imaginary quadratic field $K$. We show that every ideal lattice $I$ of $K$ has at least one well-rounded twist lattice. Moreover, we provide an explicit algorithm to compute all well-rounded twists of $I$.Comment: 24 page