جستجوی مقالات مرتبط با کلیدواژه « گیاهان » در نشریات گروه « پزشکی »

The most common mental disorder to be reported in the 21st century is anxiety disorders and the effect of indoor plants on anxiety levels has got more attention recently. Therefore, the present review study was conducted with the aim of reviewing the impact of indoor plants on anxiety.

In this study, a review to obtain studies published by April 2021 english databases like Pubmed, Scopus and Web of science and Persian Iran Medex, SID and Magiran using Persian and English keywords such as "anxiety", "stress". "Indoor plants", "Houseplants", "Pots", "Nature" and "Indoor" and "Angst", "Nervousness", "Hypervigilance", "anxiety", "Foliage", "indoor plants", "Indoor planting", "indoor flower", "Nature base environment", "potted plants", "house plants" were searched with all possible combinations.

Out of 46 studies found, 10 studies were reviewed based on inclusion criteria and the results were extracted. The results of 9 studies have significantly shown that indoor plants reduce the level of anxiety in individuals. One Study refutes this finding and shows that indoor plants have no effect on anxiety levels.

The result of most studies has been shown to reduce the effect of indoor plants on the level of anxiety in individuals and plants can be used as a non-pharmacological method to reduce the level of anxiety in indoor environments. However, due to the small number and many limitations in related studies, it is recommended that more research be done in this area.

Today, air pollution, with an impact on a global scale, is an important concern of the modern world. It has many adverse effects on human health and the environment. Therefore, it is necessary to find sustainable and environment-friendly solutions that prevent the increase of pollution levels and help eliminate them. One of the newest ways to reduce air pollution and absorb particulate matter, as well as improve air quality, is to use green walls in urban spaces. The present study investigated the potential of green walls in reducing air pollutants.  

In this research, two green walls were installed at the Khayyam intersection in Mashhad for three months. Finally, the Air Pollution Tolerance Index was determined for all the plants by measuring chlorophyll, ascorbic acid, leaf-related water content, and pH.

Results:

 All of the plant species planted on the walls were classified as intermediate in the tolerance. Among all the plants, Carpobrotus edulis and Rosmarinus officinalis had higher APTI, which makes them more resistant and suitable for planting in polluted areas. Considering the statistical analysis, the APTI of the plants was correlated with ascorbic acid and leaf-related water content.

Our findings suggest the suitability of the above-mentioned plants for plantation in areas with high levels of pollutants.

Nanotechnology is a principally attractive area of research related with production of nanoparticles of variable sizes، shapes، chemical compositions، dispersity and their possible application for human being benefits. Creation، manipulation and utilization of metallic nanoparticles، because of reduction of materials dimensions، affect the physical properties and results in displaying extraordinary thermal، optical and electronic properties of nonmaterial. The biological approaches to synthesis of nanoparticles are better than chemical and physical procedures because of low energy and time expenditure. This method requires no toxic solvents and no dangerous material for environment. Green synthesis of nanoparticles is an eco-friendly method and uses natural solvent.

In this study، the extract of Achillea wilhelmsii as the reducing agent، is used for the biosynthesis of silver nanoparticles. By adding silver nitrate in concentration of 20 mM to extract، the reaction did at room temperature and the color changed from pale yellow to dark showed the silver nanoparticles were generated.

The formation of silver nanoparticles was confirmed by the presence of an absorption peak at 450 nm using spectrophotometer. The size and shape of silver nanoparticles were monitored using scanning electron microscopy that shape of particles was spherical and average size of them was about 110 nm. Precise size and change range of nanoparticles measured by Particle Size Analysis (PSA) between 39-226 nm.

In this study، silver nanoparticles were produced with an eco-friendly biologic approach and without using any harmful chemical.

Angiogenesis, the process of new blood vessel formation from pre-existing vessels, has important physiological roles in embryonic development, female reproduction cycle, and wound healing. It is also crucial for pathological processes in several diseases especially tumor growth and metastasis. Thereby, inhibition of angiogenesis as an addition to the conventional therapies such as chemotherapy and radiotherapy has attracted the attention of scientists.

Different studies have shown that botanical derivatives specifically antagonize new vessel formation in tumors without significant toxicity to normal tissues and without major adverse reactions. Furthermore, many studies have revealed that the active ingredients of these natural products inhibit tumor cell proliferation through interference with other physiological pathways such as intracellular signaling pathways. A number of studies have also demonstrated that many traditional foods especially plant derived foods have preventive potential against around one third of cancers. Therefore, plant rich diet can inhibit the progression of many chronic diseases such as malignant solid tumors which are related to angiogenesis.