Hop (<i>Humulus lupulus</i> L.) Volatiles Variation During Storage

Tedone, Laura; Staskova, Lada; Yan, Dandan; Whittock, Simon P.; Shellie, Robert A.; Koutoulis, Anthony

doi:10.1080/03610470.2019.1704674

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…The evaporation of essential oils from biobased materials can be forced due to an increased temperature, e.g., during the drying of leaves of French tarragon (Artemisia dracunculus) at 60 • C a loss of 75% of the essential oil content was reported [56]. It can also occur spontaneously over storage time, e.g., a 43% drop in essential oil content in pelletised hops was reported over 30 days [57]. The observed difference between the essential oil content in the input ingredients before processing and in the produced materials (following processing in an increased temperature and pressure) varied between 51% and 67%, depending on the material.…”

Section: Essential Oil Contentmentioning

confidence: 99%

Dynamics and Diversity of Microbial Contamination in Poultry Bedding Materials Containing Parts of Medicinal Plants

et al. 2022

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Microorganisms thriving in poultry bedding materials during their exploitation are involved in the development of several diseases and disfunctions of animals. They can also contaminate food products and pose risks to the environment and human health. This study provides an analysis of dynamics and diversity in microbiological contamination observed during the exploitation of poultry bedding materials containing parts of medicinal plants: Satureja hortensis, Origanum vulgare, Melissa officinalis, Salvia officinalis, and Thymus vulgaris, compared with standard types of beddings: straw chaff and straw pellets. The research was carried out in two 42-day experimental cycles involving in total 2400 broiler chickens. Each week, the total count of mesophilic bacteria, fungi and yeasts, the presumptive presence and count of Staphylococcus sp., Escherichia sp., Listeria sp., Salmonella sp., and Candida sp. were determined by culturing on selective media, along with pH and moisture measurements. After 35 days of the experiment, a reduction of the total count of mesophilic bacteria above 1 log compared to the control (11.86 vs. 13.02 log CFU/g) was observed. As the count of yeasts decreased after 21 days, an increase in the total count of bacteria was reported, which indicates a strong competition between microorganisms. The results improve our understanding of the temporal effects of using materials containing parts of medicinal plants on the microbial contamination in poultry litter.

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Section: Essential Oil Contentmentioning

confidence: 99%

Dynamics and Diversity of Microbial Contamination in Poultry Bedding Materials Containing Parts of Medicinal Plants

et al. 2022

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“…The tendency of terpenoids to be volatile and thermolabile means that, depending on the structure, they may be easily oxidized or hydrolyzed. Accordingly, it is established that the chemical composition of EOs is largely dependent on the conditions during the processing and storage of the plant material, upon distillation as well as in the course of subsequent handling of the oil itself [65,66]. Studies reported when storage was at room temperature, the organoleptic properties (correlated with EO components) of dill in 12 months of storage were better preserved [67].…”

Section: Food Science and Engineering Volume 3 Issue 2|2022| 161mentioning

confidence: 99%

A Compositional Perspective of Sour Orange (Citrus aurantium L.) Flowers Essential Oil under Different Storage Conditions

Mohagheghniapour

Saharkhiz²,

Haghighi³

2022

Food Science and Engineering

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Sour orange (Citrus aurantium L.) is a tree with medicinal properties. This study assessed the impact of various storage conditions and times on the Essential Oil (EO) content of sour orange blossoms. The changes in the EO composition were recorded at the beginning of extraction and during three, six, and nine months of storage at the temperature of 4 °C (refrigerator), -20 °C (freezer), and 25 °C (room temperature) under conditions of light and darkness. According to the Gas Chromatography (GC, FID detector) and Gas Chromatography-Mass Spectrometry (GC-MS, FID detector) results, 35 compounds were identified. Linalool acetate (14.56-31.4%), linalool (18.9-23.1%), limonene (7.51-15.3%), farnesol (2.1-9%), nerolidol (6.1-8.9%), β-pinene (5.7-8.7%), trans-β-ocimene (0-7.9%), and geranyl acetate (4.2-5.7%) constituted the major EO components in different storage treatments. After nine months, linalool acetate climbed by more than twice as much. Overall, the principal EO compositions are significantly impacted by the storage circumstances. Such knowledge is essential for the food and pharmaceutical industries to use EO effectively in their intended products.

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Comprehensive analysis of chemical and enantiomeric stability of terpenes in Cannabis sativa L. flowers

Raeber,

Bajor,

Poetzsch

et al. 2024

Phytochemical Analysis

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ObjectiveCannabis sativa L. is renowned for its medicinal and recreational uses. With the increasing global legalization of C. sativa L.‐based products for medicinal purposes, there is a growing need for well‐characterized products. While the stability of cannabinoids such as tetrahydrocannabinol and cannabidiol is well understood, information on the chemical and enantiomeric stability of terpenes remains scarce. This is despite the fact that terpenes are also thought to have pharmacological activity and may contribute to the overall effect of C. sativa L.MethodsTo address these challenges, four analytical methods based on chiral, polar, and apolar gas chromatographic separation combined with either MS or FID detection were developed and validated. These methods successfully separated and quantified a total of 29 terpenes, including 13 enantiomers and 5 diastereomers specific to C. sativa L. Furthermore, terpenes and authentic C. sativa L. flowers and extracts were subjected to UV and heat treatments to observe potential degradation reactions over time.ResultsEach terpene generates a unique pattern of degradation products resulting in a diverse array of oxidation and cyclization products. P‐cymene was identified as a major product of terpene aging. Notably, no enantiomeric conversion was detected, suggesting that the formation of (−)‐α‐pinene in cannabis extracts, for example, originates from other terpenes.ConclusionTerpenes have different degradation rates, even though they are structurally similar. In addition, cultivar‐ and growth‐condition‐specific enantiomeric ratios were observed in C. sativa L., confirming that enantiomer production is species‐specific and has to be considered for therapeutical applications.

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Hop (Humulus lupulus L.) Volatiles Variation During Storage

Cited by 4 publications

References 34 publications

Dynamics and Diversity of Microbial Contamination in Poultry Bedding Materials Containing Parts of Medicinal Plants

Dynamics and Diversity of Microbial Contamination in Poultry Bedding Materials Containing Parts of Medicinal Plants

A Compositional Perspective of Sour Orange (Citrus aurantium L.) Flowers Essential Oil under Different Storage Conditions

Comprehensive analysis of chemical and enantiomeric stability of terpenes in Cannabis sativa L. flowers

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