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Jafari M.,Research Institute of Forests and Rangeland
AIP Conference Proceedings

To study past climate conditions, main climatic factor related to the energy consumption namely temperature and precipitation were considered. Heating degree days (HDD), cooling degree days (CDD) and sunshine hours were analyzed. According to all reports in different scales temperature of Astara region, in last half century has been increased. In the longer future time period, the study area will face with higher values of increasing temperature. HDD with base temperature of 18 oC reduced in last 18 years. HDD in January which is cold month also reduced. In the same time CDD increased. CDD in July which is warm month also increased. This is in the same line of increasing the number of sunshine hours in the same time slice. Astara location is included in both of Central Asia and West Asia sub-regions in IPCC AR4. Projection for temperature change in Central Asia sub-region is not in agreement with national and local downscaling results. © 2012 American Institute of Physics. Source

Ahvazi M.,Institute of Medicinal Plants | Akbarzadeh M.,Research Institute of Forests and Rangeland | Khalighi-Sigaroodi F.,Institute of Medicinal Plants | Kohandel A.,Iranian Academic Center for Education
Journal of Medicinal Plants

Background: Some knowledge about medicinal plants is available in old references or books. But important point is, the information of traditional usage of medicinal plants from different parts of Iran be worthwhile and people is encouraged to use of them, another way it is a good background for future examination about medicinal plants. Objective: One of the most important sources of traditional medicine data collection is indigenous people. So the aims of the study are asking the knowledge from eldest and native people to accumulation the wealth and to guide interested people to use of medicinal plants. Methods: We started our investigation after prepared a map to distinction the area and different villages. Then we interviewed about medicinal plants in the region from eldest and native people. The specimens that were collected in the region were transferred to herbarium (ACECR) to recognition. Results: In this investigation 14 medicinal species belong to 11 families were collected and identified. In comparison with another survey in some region in neighboring provinces, there are some differences between how to use of medicinal plants and traditional usage that it is due to mores of indigenous people in the each part. Conclusion: Considering that the region has a favorable weather and rich flora especially medicinal plants and also has a previous historical of traditional medicine, so it is needed to pay attention to protect them. Another way we found some new effects of the medicinal plants that can be subjected for investigations to more examination. Source

Pahlevani A.,Iranian Research Institute of Plant Protection | Mozaffarian V.,Research Institute of Forests and Rangeland

During the joined study on recently collected specimens and herbarium sheets belonging to the genus Euphorbia (Euphorbiaceae), a new species, Euphorbia iranshahri Pahlevani, was reported and illustrated as endemic from the Zagros Mountains in Iran. This species is morphologically distinct from E. microsciadia Boiss. by possessing 6-8 rays and ray-leaves, subulate cyathia lobes longer than (or sometimes equal to) anthers, sharp-keeled capsules and smooth seeds. © Publications Scientifiques du Muséum national d'Histoire naturelle, Paris. Source

Eikani M.H.,Iranian Research Organization for Science and Technology | Golmohammad F.,Iranian Research Organization for Science and Technology | Sadr Z.B.,Iranian Research Organization for Science and Technology | Amoli H.S.,Iranian Research Organization for Science and Technology | Mirza M.,Research Institute of Forests and Rangeland
Journal of Essential Oil-Bearing Plants

Response surface methodology (RSM) was applied to evaluate the extraction conditions of Cinnamomum zeylanicum Blume using superheated water extraction (SWE) followed by solid phase extraction (SPE). E-cinnamaldehyde as the main oxygenated component of C. zeylanicum essential oil was selected to be the representative of the whole desirable essential oil. Influence of operating conditions such as temperatures from 100 to 160°C, flow rates from 1.0 to 4.0 ml/min, and mean particle sizes from 0.250 to 1.000 mm on essential oil yield and extract concentration was investigated. The optimal extraction condition was predicted to be at 138°C, flow rate of 1 ml/min and mean particle sizes of 1.000 mm. Maximum yield and extract concentration from the mathematical model and the experiments were 2.21 % and 2.69 %, and 0.280 and 0.318 mg/ml, respectively. The essential oil composition of C. zeylanicum using SWE followed by SPE was compared with hydrodistillation method. The amount of desirable E-cinnamaldehyde obtained using SWE was the same as hydrodistillation, but the levels of non-oxygenated sesquiterpenes were lower. © 2013 © 2013 Har Krishan Bhalla & Sons. Source

Alizadeh M.A.,Research Institute of Forests and Rangeland | Arab H.A.,Islamic Azad University at Karaj | Tabaie R.,Research Institute of Forests and Rangeland | Nasiri M.,Research Institute of Forests and Rangeland
Pakistan Journal of Biological Sciences

In greenhouse experiment, the seed samples of 3 populations were treated with treatments including: cold stratification, Gibberlic Acid (50 ppm and 100 ppm), Potassium nitrate (0.2%, 0.4%), physical scarification (sand paper), chemical scarification (Ethylic alcohol 70%) and distilled water (control), then these treated seed samples were sown in pots as randomize design with three replication. The germination characteristics including: germination percentage, speed of germination, length of root and shoot, seedling length, ratio of root length by shoot length, vigor index, fresh weight and dry weight, ratio of dry weight by fresh weight were evaluated during 45 days of experiment. Comparing between three populations of Sahandy savory, seed germination characteristics of the Ghazvin population was higher than the other two populations. According to effect of treatment on germination seed characteristics, the species of savory and their population, it was concluded that effect of Gibberlic Acid and Potassium nitrate was higher than physical scarification and chemical scarification comparing with control. With more effective of gibberlic acid and KNO3 and cold treatment on seed germination enhancement of the population, it was clarified that the type of dormancy of some population of Sahandy savory was physiological dormancy. © 2013 Asian Network for Scientific Information. Source

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