Medicinal plants contain active ingredients in one or some of their organs. Squalene is one of the active ingredients that prevent heart attacks and cardiovascular diseases and protect the body from some cancers. The aim of the present study was to investigate the presence of squalene in a number of medicinal plants. In this experiment, the plant oils were extracted and measured using Bligh & Dyer with minor changes. TLC (thin layer chromatography) was used to identify squalene. Comparison of TLC of standard squalene with TLC of the investigated medicinal plant samples showed that Caryophillium aromaticus, Descurainia sophia, Portulaca Oleracea, Papaver somniferum and Nigella Sativa contained squalene. Although the percentage of Papaver somniferum and Nigella Sativa seed oil was higher than other medicinal plants, the squalane spot of clove plant had a higher intensity of color and this indicates a higher concentration of squalene in this plant.

More than 22% of the world's agricultural land is saline, and this trend continues to increase with climate changes. Salinity stress causes leaf color change, osmotic stress, ionic toxicity, prevents growth, photosynthesis and plant performance. Due to their size less than micron, metal nanoparticles have a great absorption and transmission power in plants. Salinity stress is a major problem in hot and dry areas under tomato cultivation. For this purpose, investigating the mutual effects of the size and type of zinc oxide and iron oxide nanoparticles on the improvement and change of growth and increasing the resistance to salt stress in tomato plants of the early urbana variety were carried out in the form of a completely randomized and factorial design with 4 replications, at a significant level of 5%. In this research, zinc oxide nanoparticles in 25 and 50 nm sizes, iron oxide in 25 nm sizes and sodium chloride in 0 and 75 mM levels were used. Nanoparticles and salinity treatments were both applied to the plants. The results showed that salt stress led to a decrease in plant growth parameters such as shoot and root length, leaf area, RWC, ion leakage. Also, NaCl led to an increase in the accumulation of prolin and other aldehydes, sodium, iron and zinc. The application of nanoparticles had a slight effect in stress-free conditions, but in stressed conditions, these two nanoparticles alone and especially in combination neutralized the effect of salinity and reduced the damage caused by salinity stress.

در این بررسی تعداد 36 گونه گیاهی اسانس دار از تیره نعناع در مناطق مختلف استان مازندران از ارتفاع همسطح دریا تا 4000 متری مورد مطالعه قرار گرفتند. عوامل مورد تحقیق در رویشگاه های گونه ها شامل درصد شیب، جهت جغرافیایی، ارتفاع از سطح دریا، نقاط پراکنش، بافت خاک، اقلیم، متوسط بارندگی سالانه، درجه حرارت سالانه، درصد پوشش، بهترین رویشگاه از لحاظ فراوانی و تراکم، نحوه پراکنش، تیپ گیاهی، گیاهان عمده همراه فنولوژی بود. نتایج نشان داد که برخی از گونه ها معرف شرایط خاص محیطی هستند. گونه هایLeonurus cardiaca, Betonica nivea supsp mazandarana  عرف شرایط اقلیمی فراسرد و دامنه های برفگیر در ارتفاعات بیش از 3000 متر از سطح دریا و گونه های Hymenocrater calycinus, Teucrium chamaedry, Ziziphora teniur و Eremostachys labiosiformis و Stachys turcomanica Eremostachys macrophylla، معرف شرایط اقلیمی نیمه خشک سرد با بارندگی 350-250 میلیمتر، گونه های Calamintha grandiflora و Stachys persica معرف شرایط اقلیمی مرطوب می باشند. بیشترین فراوانی گونه های مورد بررسی در اقلیم مدیترانه ای سرد می باشد. گونه Nepeta saccharata معرف مناطق واریزهای و شیب دار، گونه های Stachys Setifera، Marrubium vulgare، origanum vulgare معرف خاکهای به هم خورده و دامنه نورگیر مناطق جنگلی و بیشه زارها، گونه های Calamintha grandiflora, Nepeta cataria معرف اطراف جویبارها و مناطق مرطوب، گونه Stachys byzanthina معرف دیمزارهای رها شده در مناطق حد واسط جنگل و مرتع و گونه هایStachy inflate  و Perovskia abrotanoides معرف خاکهای آهکی شور می باشند. گونه هایTeucrium polium, ،Stachy byzanthinas و Stachys lavandulifolia وThymus spp  دارای بیشترین فراوانی و گونه های Betonica nivea subsp mazandarana، Hymenocrater.Calamintha officinalis ،Eremostachys macrophylla ،Ziziphora tenuior، Nepeta Pungens، Eremostachys labiosiformis, Nepeta saccharata.،Nepteta cataria ، Stachys setifera دارای کمترین فراوانی می باشند.

Since the evaluation of the diversity indicators in consumption of medicinal species by the beneficiary’s households and its driving factors is of utmost importance in marketing, multi-purpose planning of rangelands and sustainable development, a questionary-based study was carried out to determine the diversity indices of medicinal species consumption in settled nomadic communities living under different management and livelihood situations in the rangelands of Dyvaroeieh in Bardsir township, Kerman province, Iran. To this end, the medicinal species consumed by each household (as a study unit) in addition to the diversity indicators of consumption (i.e., dominance coefficient and Shannon-Weiner index) were evaluated under two management sites comprising Rangeland Management Plan (RMP) (i.e.,Dvyaroeieh 1) and the nearest adjacent rangeland without RMP (i.e., Dyvaroeieh 2, as control treatment ) and three livelihood levels (i.e., very poor (<50 million Rials monthly income), poor (50-100 million Rials monthly income) and moderate (100-150 million Rials monthly income)) under factorial test in SPSS software environment. The study's results revealed that both of management and livelihood factors can be applied by manager to increase diversity indices in medicinal plants consumed by beneficiaries. More specifically, management through RMP was more powerful and effective tool in this way. Therefore, it could conceivably be argued that RMP can be considered as a driving factor in increasing the diversity of medicinal plant consumption and also be a suitable platform to meet the needs and demands of rangelands’ beneficiaries in this field.