ABSTRACT
Stress such as uncertainty about the future, including the problem of new coronavirus infection, is a very serious problem not only for physical health but also for mental health. It is certain that stress is one of the risk factors for developing mental disorders. We have found stress-responsive biomarker (stress marker) candidates through studies on the process from stress to disease onset. Recently, we have been trying to prove the stress-suppressing effect of aroma with brain factors. We analyzed how aroma affects behavioral changes due to stress and the expression of stress marker candidates in the brain. In this article, the data on aroma that we have accumulated so far will be introduced. Specifically, we will describe changes happened in experimental animals when they smelled coffee beans, lavender, cypress, a-pinene, and thyme linalool. When considering the biological effects of aroma, it is inevitable that not only the olfactory pathway but also odor molecules act through the bloodstream by nasal and transdermal absorption. The brain transferability of odor molecules may be a bottleneck in analyzing the biological effects of volatile components. Thus, we would like to discuss on this issue.
ABSTRACT
Aim of study: This study aimed to determine the medicinal plant use preferences of herbalists' customers against the COVID-19 symptoms during pandemic period. Area of study: The study was carried out in nine provinces located in the Central and Eastern Anatolia Region of Turkey and the herbalists selling medicinal plants. Material and methods: Data on 35 plants from 373 customers and 49 herbalists were collected between April 2020 and December 2020. Relative Frequency of Citation (RFC) and Fidelity Level (FL) quantitative indices were used to measure the use, cultural significance, and specificity of plants. Main results: The highest RFC was found for Thymus spp. (0.59). It was followed by Ceratonia siliqua L. (0.56), Zingiber officinale Roscoe (0.56), and Mentha pulegium L. (0.50), respectively. The plants in the study area with a high FL were Zingiber officinale (84.83%) for cough, Thymus spp. (80.95%) for fever, Mentha pulegium (76.47%) for nausea-vomiting. Sambucus nigra L., Echinacea angustifolia DC., and Thymus spp. were the plants whose sales/demand increased the most during the pandemic period. Highlights: It was understood that there was a significant increase in the sales of species such as Sambucus nigra, Echinacea angustifolia, and Thymus spp., during the pandemic period. This situation showed that there was a consensus among the public that these plants were effective against COVID-19 symptoms.