Fragrance Analysis of Two Scented Hippeastrum Species

We report the analysis of floral fragrance volatiles from two scented amaryllis species, Hippeastrum brasilianum and Hippeastrum parodii. Whereas the headspace of H. brasilianum is dominated by a large peak of (Z)-β-ocimene (88% of total peak area), H. parodii has two large peaks comprising 78%, identified as eucalyptol (1,8-cineole, 30%) and (Z)-β-ocimene (48%). The two species also differ in other constituent compounds. Overall, H. parodii, although producing less total volatile organic compounds (VOCs), has a more diverse bouquet. This species also exhibits an inverse pattern of emission between eucalyptol and β-ocimene, both daily and across the 4-day period from anthesis to senescence of the flower. We compare our results with reports for a complex amaryllis hybrid and a bat-pollinated species, Hippeastrum calyptratum. The hybrid had a very different complement of emissions. The bat-pollinated species shared some of the same constituent volatiles as H. brasilianum and H. parodii, but at lower percentages, and emitted a more diverse assortment of compounds. We conclude that both H. brasilianum and H. parodii attract lepidopteran pollinators but suggest that H. parodii may also attract other insects. We briefly discuss floral fragrance from the perspective of breeding amaryllis.

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Stationary source emissions. Determination of total volatile organic compounds (TVOCs) in waste gases from non-combustion processes. Non-dispersive infrared analyser equipped with catalytic converter

10.3403/30207396 ◽

2015 ◽

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Catalytic Converter ◽

Total Volatile ◽

Stationary Source ◽

Volatile Organic ◽

Total Volatile Organic Compounds ◽

Combustion Processes

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Investigations of Museum Indoor Microclimate and Air Quality. Case Study from Romania

Atmosphere ◽

10.3390/atmos12020286 ◽

2021 ◽

Vol 12 (2) ◽

pp. 286

Author(s):

Dorina Camelia Ilieș ◽

Florin Marcu ◽

Tudor Caciora ◽

Liliana Indrie ◽

Alexandru Ilieș ◽

...

Keyword(s):

Air Quality ◽

Volatile Organic Compounds ◽

Organic Compounds ◽

Construction Materials ◽

International Standards ◽

Total Volatile ◽

Negative Effects ◽

Museum Exhibits ◽

Volatile Organic ◽

Total Volatile Organic Compounds

Poor air quality inside museums is one of the main causes influencing the state of conservation of exhibits. Even if they are mostly placed in a controlled environment because of their construction materials, the exhibits can be very vulnerable to the influence of the internal microclimate. As a consequence, museum exhibits must be protected from potential negative effects. In order to prevent and stop the process of damage of the exhibits, monitoring the main parameters of the microclimate (especially temperature, humidity, and brightness) and keeping them in strict values is extremely important. The present study refers to the investigations and analysis of air quality inside a museum, located in a heritage building, from Romania. The paper focuses on monitoring and analysing temperature of air and walls, relative humidity (RH), CO2, brightness and particulate matters (PM), formaldehyde (HCHO), and total volatile organic compounds (TVOC). The monitoring was carried out in the Summer–Autumn 2020 Campaign, in two different exhibition areas (first floor and basement) and the main warehouse where the exhibits are kept and restored. The analyses aimed both at highlighting the hazard induced by the poor air quality inside the museum that the exhibits face. The results show that this environment is potentially harmful to both exposed items and people. Therefore, the number of days in which the ideal conditions in terms of temperature and RH are met are quite few, the concentration of suspended particles, formaldehyde, and total volatile organic compounds often exceed the limit allowed by the international standards in force. The results represent the basis for the development and implementation of strategies for long-term conservation of exhibits and to ensure a clean environment for employees, restorers, and visitors.

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