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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Desert
- نوع مقاله: Journal Article
- کلمات کلیدی: Pollution,Mining,Arid rangelands,heavy elements,Zygophyllum eurypterum
- چکیده:
- چکیده انگلیسی: Environmental contaminations resulting from mining operations play an important role in the collapse of ecosystems balance. In order to measure vegetation characteristics and to study soil and plant contamination in rangelands surrounding bauxite mine, a systematic random sampling was done according to physiognomy and homogeneity of vegetation cover. Sampling was performed using a 50-meter transect in three areas including near the mine (0-200 m), medium distance from the mine (200 to 500 m) and long distance from the mine (500 to 1000 m). Soil sampling sites were systematically selected from the middle of transects. In each region, three samples of the aerial parts and leaveswere randomly taken from Zygophyllum eurypterum plant with three replications. Then the concentration of heavy metals in soil and plant samples was evaluated using X-ray Fluorescence Spectroscopy, S4-Explorer model. The results showed that the highest and lowest metals concentrations in all soil and plant samples were obtained at a distance of 200 and 1500 meters from the mine, respectively. The overall evaluation results based on the integrated pollution index and mean of pollution degree showed that the pollution potential of the study area is low to moderate. The findings also indicated that the soil surrounding the mine is contaminated with aluminum, titanium, antimony and iodine.
- انتشار مقاله: 20-07-1399
- نویسندگان: A. Rashtian,N. Monemi,S.H. Jafari,H.R. Azimzadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Desert
- نوع مقاله: Journal Article
- کلمات کلیدی: Salinity,germination,Thymus deanensis,Matricaria comomilla
- چکیده:
- چکیده انگلیسی: Salinity is one of the environmental factors that have a critical influence on the germination of seeds and plant establishment. Salinity affects imbibition, germination and root elongation. In this study, the germination characteristics of Matricaria comomilla and Thymus deanensis were studied. The purpose of this study was to investigate the effect of salinity on germination of these species. Seeds were treated with 0, 100, 200, 300 and 400mmol of NaCl. Daily and final germination percentages were recorded. The results showed that high salinity caused decrease in final germination percentage and Higher concentration of NaCl was germination inhibitor. Finally, results suggest that Thymus deanensis was more tolerant to salinity.
- انتشار مقاله: 16-12-1390
- نویسندگان: H. Joneidi Jafari,H. Azarnivand,A. Sadeghipour,A. Malekian
- مشاهده
- جایگاه : پژوهشی
- مجله: Desert
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: The studies conducted on plants grown in Kashan have showed the presence of abundant valuable
industrial - medicinal plants. Unforlunately, a lot of these plants are removed as weed or grazed by livestock
because of Lack of inhabitants' ignorance of their using and mismanagement. -
Perovskia abrotanoides is of Lamiaceae family. The natural habitat of this plant is mostly near waterways, the
beds and borders of seasonal rivers and mountainous ravines, namely the watersheds of south and southeast
of Kashan .It is also seen in the borders of gardens and farms in these areas. This plant is mostly seen at the
elevations 1500 - 2700 m. Its flowers, leaves and stems contain a lot of essence that can be used in medicine
industry.
In order to study this plant phytochemically, 6 areas (points) were selected. The average amount of plants'
essence obtained from these 6 investigated areas was 4/5 cc(1/44%) in Ferizhend , 3/8 cc(1/1%)in Abyaneh,
2/8 cc(1/12%) in Chimeh, 219 cc(0/93%) in Ghohroud, 1/9 cc(0/61%) in Totmaj and 2/3 cc(O/74%) in Jahagh.
Moreover determining the amount of existent essence in plant, we proceeded to find four plant materials:
Saponin, Alkaloid, Tannin, Flavanoid. The amount of each material in plant was defined qualitatively in which
the amount of saponin was considerable.- انتشار مقاله: 11-04-1393
- نویسندگان: H. Azarnivand,M. Alikhah Asl,M. Jafari,H. Dastmalchi,J. Safari,H. Joneidi Jafari
- مشاهده
- جایگاه : پژوهشی
- مجله: Caspian Journal of Environmental Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: wild goat (Capra aegagrus),habitat suitability model,binary logistic regression,Kouh,e,Bafgh
- چکیده:
- چکیده انگلیسی: Wild goat (Capra aegagrus) is one of the most prominent mountain mammals dispersed in many habitats in Iran. However, few studies on the relationship between this species and its habitat have been conducted. This species is recognized as one of the main food source for highly endangered species such as cheetah and leopard. In this study which lasted from fall 2009 through summer 2011, seasonal habitat suitability models of wild goat in the protected area of Kouh-e-Bafgh were created. The binary logistic regression analysis comparing ecological characteristics of presence and absence points with ecological characteristics of the region have been applied. Wild goat habitat use was influenced by steep slopes, rocky substrates, and distance to water sources, vegetation, aspects and human resources (roads). Applied models could predict at least 94.7% of the model evaluation points, indicating high accuracy of the models. Suitable habitats for wild goat in protected area of Kouh-e-Bafgh were classified in different seasons based on the estimated optimal cut-off value for each model. It comprised 29.5% to 41.3% of the protected area. There was a substantial overlap between seasonal suitable habitats in different seasons, with the highest overlap between spring and summer. The overlap between suitable habitats was at least 71.6% in all seasons. The most suitable habitats of wild goat and its predator were in the core zones of the study area.
- انتشار مقاله: 11-10-1348
- نویسندگان: J. Sarhangzadeh,A.R. Yavari,M.R. Hemami,H.R. Jafari,B. Shams-Esfandabad
- مشاهده
- جایگاه : پژوهشی
- مجله: Archives of Razi Institute
- نوع مقاله: Journal Article
- کلمات کلیدی: Androctonus crassicuda,phylogeny,morphometric features,cytochrome oxidase subunit I,12sRNA
- چکیده:
- چکیده انگلیسی: The Androctonus crassicuda is the most diverse scorpion species in the family of Buthidae, which is endemic to Khuzestan province, Iran. Investigation of the relationship of species by means of a molecular study of specimens is one of the new approaches due to the limitations of the morphological approaches. In the current study, the analysis was based on 32 morphological characteristics of A. crassicuda native to southwest Iran. Moreover, the DNA sequencing of two mitochondrial markers, namely cytochrome oxidase subunit I and 12sRNA loci was performed, and the phylogenetic tree was constructed using maximum likelihood method with 1000 replications using MEGA software (version 7). Based on the results of the phylogenetic tree, A. crassicuda was classified into a monophyletic group. However, the genetic diversity of this species populations was not significant (0.001). The highest and lowest genetic distance of A. crassicuda was compared with the reports obtained in Urmia and west Azerbaijan, Iran. There was a clear divergence between the A. crassicuda isolated from northern and southern areas of Iran. This study showed the importance of geographical and climate features of the region and genetic distance among the populations. The phylogenetic analysis of Androctonus species from other regions showed the highest and lowest genetic distance with A. gonneti (Morocco) and A. amoreuxi (Portugal), respectively. The comparison of the morphological characteristics and morphometric results revealed that metasoma characteristics are important in the identification of A. crassicuda. The results of the analysis of the morphometric values of A. crassicuda were mainly compatible with the phylogenetic trees and supported the traditional morphological classification, thereby presenting a clearly definition of the genera of Androctonus species.
- انتشار مقاله: 03-12-1398
- نویسندگان: H. Jafari,F. Salabi,Sh. Navidpour,A. Foriuzan
- مشاهده
- جایگاه : پژوهشی
- مجله: Archives of Razi Institute
- نوع مقاله: Journal Article
- کلمات کلیدی: treatment,Hydatid cyst,Protoscolices,Mesobuthus eupeus,Venom
- چکیده:
- چکیده انگلیسی: Hydatidosis is an important zoonosis caused by a parasitic tapeworm, namely Echinococcus granulosus. This infection is distributed worldwide and affects the health as well as economic loss in both humans and animals. In most cases, the disease needs chemotherapy with or without surgery. Conventional drugs have some major problems, including drug complications, harmful side effects, and also progressive resistance. According to the importance of biological productions as alternative medicine, a large number of studies confirmed that whole venom and many peptide ingredients of the scorpion venom have various different medical benefits, including antimicrobial properties, due to the mechanism of blocking gated ion channel. In this study, the venom peptides of Mesobuthus eupeus scorpionwere purified using gel filtration chromatography and subsequently ion exchange chromatography, followed by the determination of the molecular weights of the proteins by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) procedure. After collecting the hydatid cysts fluids from the liver of infected sheep, protoscolices were derived, washed, and encountered to the whole venom as well as eight different fractions of toxin 30, 60, 120, and 240 min after the exposure. In the next step, the viability of protoscolices was determined by eosin staining. The obtained results revealed that a venom fraction under 10 kDa killed all protoscolices after 30 min. Moreover, it was found that the scolicidal activity of fractions increases according to the time of exposure. As a result, it can be concluded that M. epeus venom peptides under its LD50 (1/2 LD50) can properly and quickly destroy the protoscolices of hydatid cysts at the level of applied concentrations and such components are good alternatives to treat hydatidosis.
- انتشار مقاله: 28-01-1397
- نویسندگان: H. Jafari,M. Nemati,P. Haddad Molayan,L. Khaleghi Rostamkolaie,H. Hamidi Nejat
- مشاهده
- جایگاه : پژوهشی
- مجله: Archives of Razi Institute
- نوع مقاله: Journal Article
- کلمات کلیدی: Iran,Giardia duodenalis,genotyping,ssu-rRNA,gdh,Arabian horse
- چکیده:
- چکیده انگلیسی: Giardia duodenalis is globally recognized as an important zoonotic intestinal protozoan parasite. So far, eight assemblages of G. duodenalis (A-H) have been identified. Substantial evidence suggests the zoonotic potential of assemblages A, B, and E in livestock. In this study, the genotype of Giardia duodenalis isolates was genetically identified by determining the sequence of ssu-rRNA gene and performing polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) on glutamate dehydrogenase gene of the parasite in Arabian horses from Ahvaz, located in southwest of Iran. The results revealed that assemblages AI and E (livestock-associated G. duodenalis) were present in horse isolates. Also, based on the findings, prevalence of G. duodenalis infection among horses was estimated at 35.7%. The results indicated that G. duodenalis is highly prevalent among Arabian horses, posing a zoonotic risk for giardiasis in Ahvaz, Iran.
- انتشار مقاله: 03-07-1395
- نویسندگان: H. Jafari,M.H. Razi Jalali,M. Seyfi Abad Shapouri,M.R. Haji Hajikolaii
- مشاهده
- جایگاه : پژوهشی
- مجله: Archives of Razi Institute
- نوع مقاله: Journal Article
- کلمات کلیدی: treatment,Hydatid cyst,Protoscolices,Mesobuthus eupeus,Venom
- چکیده:
- چکیده انگلیسی: Hydatidosis is an important zoonosis caused by a parasitic tapeworm, namely Echinococcus granulosus. This infection is distributed worldwide and affects the health as well as economic loss in both humans and animals. In most cases, the disease needs chemotherapy with or without surgery. Conventional drugs have some major problems, including drug complications, harmful side effects, and also progressive resistance. According to the importance of biological productions as alternative medicine, a large number of studies confirmed that whole venom and many peptide ingredients of the scorpion venom have various different medical benefits, including antimicrobial properties, due to the mechanism of blocking gated ion channel. In this study, the venom peptides of Mesobuthus eupeus scorpionwere purified using gel filtration chromatography and subsequently ion exchange chromatography, followed by the determination of the molecular weights of the proteins by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) procedure. After collecting the hydatid cysts fluids from the liver of infected sheep, protoscolices were derived, washed, and encountered to the whole venom as well as eight different fractions of toxin 30, 60, 120, and 240 min after the exposure. In the next step, the viability of protoscolices was determined by eosin staining. The obtained results revealed that a venom fraction under 10 kDa killed all protoscolices after 30 min. Moreover, it was found that the scolicidal activity of fractions increases according to the time of exposure. As a result, it can be concluded that M. epeus venom peptides under its LD50 (1/2 LD50) can properly and quickly destroy the protoscolices of hydatid cysts at the level of applied concentrations and such components are good alternatives to treat hydatidosis.
- انتشار مقاله: 28-01-1397
- نویسندگان: H. Jafari,M. Nemati,P. Haddad Molayan,L. Khaleghi Rostamkolaie,H. Hamidi Nejat
- مشاهده