Revista de Química. Vol. 36 Núm. 1 (2022)

URI permanente para esta colecciónhttp://54.81.141.168/handle/123456789/185420

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Editorial
  • La química de la comida Ortega-San-Martin, Luis; 1

    • Artículos
  • Redes Metal Orgánicas de Plata como Inhibidores Bacterianos Loera-Serna, Sandra; Osornio Castillo, Adriana; 2-9
  • El Copihue, Lapageria rosea R. et P. y su Química Escobar Zapata, Carlos Alfonso; 10-17
  • Estudio Configuracional Basado en el Análisis de Constantes de Acoplamiento Homonucleares y Heteronucleares Cen-Pacheco, Francisco; López-Fentanes, Fernando C; 18-25
  • Tratamiento físico químico del agua para el enfriamiento de motores en la generación de electricidad Acosta-Nardin, Viviana; Nardín-Anarela, Alexia Esther; 26-34
  • La química en nuestros platos: los preservantes Ángeles-Boza, Alfredo M; 35-41

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      La química de la comida
      (Pontificia Universidad Católica del Perú, 2022-06-24) Ortega-San-Martin, Luis
      No presenta resumen
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      La química en nuestros platos: los preservantes
      (Pontificia Universidad Católica del Perú, 2022-06-23) Ángeles-Boza, Alfredo M.
      Preservatives and preservation techniques give us access to the rich flavors of fresh food we all love while being away from the fields. Preservation techniques have been known since antiquity but they became more sophisticated after the Industrial Revolution as cities became more populous. Nowadays, preservatives are part of our daily life. They have become even more important as our society reaches for sustainability and food waste reduction. But the reader probably has a burning question: are they safe? The short answer is yes, they are safe. Let’s take a look at the history and chemistry of some of the most common chemicals used in food preservation techniques. With this information, the readers can decide on their own.
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      Estudio Configuracional Basado en el Análisis de Constantes de Acoplamiento Homonucleares y Heteronucleares
      (Pontificia Universidad Católica del Perú, 2022-04-22) Cen-Pacheco, Francisco; López-Fentanes, Fernando C.
      A crucial step in the discovery of any new molecule is to determine its complete structure, which includes determining the planar structure of the molecule and its stereochemistry. It has been seen that the latter is strongly linked to its chemical and biological properties. However, this is particularly difficult when the chiral center(s) are in portions with high flexibility that are easily exchanged between different conformations, as is the case with acyclic fragments or rings with high flexibility. Improvements in NMR spectroscopy methods have made it a powerful tool for determining the structure of organic molecules. One of the most popular strategies developed in recent decades to address many structural problems is J-constant-based analysis (JBA), which consists of the use of long-distance heteronuclear (C—H) coupling constants (two or three bonds) to determine the stereochemistry, even in systems with flexibility.
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      Tratamiento físico químico del agua para el enfriamiento de motores en la generación de electricidad
      (Pontificia Universidad Católica del Perú, 2022-05-27) Acosta-Nardin, Viviana; Nardín-Anarela, Alexia Esther
      This article covers a bibliographic review on the chemical treatment of water, used for the cooling of internal combustion engines, in generating sets. The text includes concepts associated with the generation distributed, cooling systems and their characteristics, the main problems caused by water in the cooling system, corrosion and how to prevent it with the use of inhibitors and different chemical treatments to condition the water, including reverse osmosis.
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      El Copihue, Lapageria rosea R. et P. y su Química
      (Pontificia Universidad Católica del Perú, 2022-03-03) Escobar Zapata, Carlos Alfonso
      The Chilean bellflower, or Lapageria rosea, is a climber, endemic to central and southern Chile, whose flowers are mainly red in the wild, but that can appear in different shades when cultivated, they range from white to deep red through pink and light red with white spots. In addition to the historical account of its discovery, and how it came to be considered the national flower of Chile, this review describes the long way to determine the chemical structure of the compounds responsible for the Chilean bellflower’s color, the volatile compounds emitted by the flower and the sugars present in its nectar.
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      Redes Metal Orgánicas de Plata como Inhibidores Bacterianos
      (Pontificia Universidad Católica del Perú, 2022-03-03) Loera-Serna, Sandra; Osornio Castillo, Adriana
      Currently the development of new materials with potentialized properties is a challenge for the scientific community, particularly those that function as bactericides. The study of structures containing silver has increased in recent decades thanks to the synthesis of nanoparticles, which have various properties of interest, including bactericidal effects. We have sought to have materials that can contain silver in metallic or ionic form and with properties that allow them to act against various disease-causing organisms, such as bacteria. This work addresses the main results of a new type of hybrid materials called metal organic frameworks, or MOFs, that are formed by metal centers and organic ligands joined by coordination bonds. Additionally, the most important details of the use of silver in the construction of MOFs and its bactericidal effect will be explored, opening to the reader a panorama about the synthesis and characteristics of this new nanostructured materials.