DROUGHT STRESS INCREASES THE EXPRESSION OF WHEAT LEAF RIBULOSE- 1, 5- BISPHOSPHATE CARBOXYLASE/OXYENASE PROTEIN
R.
ASGHARI
Department of Biology, Faculty of Science, University of Tehran, I. R. of Iran
author
H.
EBRAHIMZADEH
Department of Biology, Faculty of Science, University of Tehran, I. R. of Iran
author
text
article
2006
eng
The effects of drought stress and exogenous abscisic acid on the expression of ribulose-1, 5-bisphosphate carboxyIase/oxygenase activase (Rubisco activase) were examined in wheat (Triticum aestivumL.). In response to water stress and abscisic acid, both the levels of endogenous abscisic acid and Rubiscoactivase increased in the leaves. Immunoblot analysis showed that both drought stress and abscisic acid,increased the amount of a 51KD activase form of the enzyme. In addition, our results from wheat leavesshowed that Rubisco activase up regulated under drought stress by increasing the amount of endogenousabscisic acid. Therefore the level of Rubisco activase was dependent on the abscisic acid level. These resultsare consistent with previous findings that Rubisco activase increases under high temperature stress. Theseresults indicate that the increased rate of activases synthesis may play a role in coping with the decline inphotosynthetic capacity under drought stress. Effects of drought stress and abscisic acid and their interactionwere highly significant (p<0.01) for all variables.
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https://ijsts.shirazu.ac.ir/article_2725_5f5c6872ad8c748b184fe12da723d3b2.pdf
dx.doi.org/10.22099/ijsts.2006.2725
KARYOTYPE STUDY IN SOME LATHYRUS L. ACCESSIONS OF IRAN
A.
ARZANI
College of Agriculture, Isfahan University of Technology, Isfahan, 84156, I. R. of Iran
author
text
article
2006
eng
Twenty accessions of cultivated grass pea (Lathyrus sativus L.) and wild species of Lathyrus L.collected from western and southern regions of Iran were evaluated for their mitotic metaphase chromosomalcharacteristics. All populations comprising 16 populations of cultivated L. sativus and 4 wild populations ofLathyrus L. were diploid, 2n=2x=14 chromosomes. There were significant variations among populations inthe number of metacentric, submetacentric and subtelocentric chromosomes, the longest and shortestchromosome lengths, total haploid complement, arm ratios and centromeric index. The karyotypic formula ofwild Lathyrus spp. populations were quite varied from those in native grass pea cultivars in having either twoor three pairs of subtelocentric chromosomes and accordingly containing one or two metacentricchromosomes. In addition, total chromosome length (TCL) in wild Lathyrus L. accessions was less than thosefor grass pea populations. The mean length of the largest chromosome differed significantly amongpopulations, with populations 5 having the largest chromosome (7.2μm). The mean length of the shortestchromosome did not differ among populations, with wild populations from Ilam (populations 17, 18 and 19)having the lowest value. The arm ratios and centromeric index (CI) data revealed adverse trends, whilst wildpopulations of Lathyrus L have the highest arm ratios and the lowest CI values. There were only slightdifferences in the mean of arm ratios among the native grass pea populations considering a range of 1.3 to 1.9for this morphological trait.
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https://ijsts.shirazu.ac.ir/article_2726_b5291c93fa5120ab655958b456cff149.pdf
dx.doi.org/10.22099/ijsts.2006.2726
TOXIC EFFECTS OF HYDROALCOHOLIC EXTRACT OF KIWI (ACTINIDIA CHINENSIS) ON HISTOLOGICAL STRUCTURE OF THE MALE SPRAGUE-DAWLEY RAT REPRODUCTIVE TISSUES
F.
DEHGHANI
Department of Anatomy, Medical School, Shiraz Medical Sciences University, Shiraz, I. R. of Iran
author
T.
TALAEI-KHOZANI
1Department of Anatomy, Medical School, Shiraz Medical Sciences University, Shiraz, I. R. of Iran
author
M. R.
PANJEHSHAHIN
Medical and Natural Products Chemistry Research Center, Shiraz Medical
Sciences University, Shiraz, I. R. of Iran
author
Z.
PANAHI
Shiraz Medical Sciences University, Shiraz, I. R. of Iran
author
text
article
2006
eng
Hormonally active agents are widespread in the environment and exist in the human diet. There isinsufficient knowledge regarding the influence of phytochemicals on the pathophysiology of the malereproductive system. Kiwi is a rich source of phytochemicals such as flavones (with estrogenic activity),serotonin and vitamin C. These components can influence the hormones and interfere with reproductiveactivities. Therefore, the objective of this project was to determine whether extract of kiwi could change thestructure of male reproductive tissues. So, 40 male rats were divided into four groups. Three experimentalgroups were fed with 75, 100 and 150 mg/kg of kiwi extract and control groups with solvent for 50 days.Then, rats were sacrificed and their testis, ductus deferens, seminal vesicle, prostate and epididymidis wereremoved, fixed, processed and stained with H & E and Acridine Orange. The specimens were studied underlight and fluorescent microscopes. Histological observations revealed some changes in the structure of testes,but not in the other parts of male reproductive tissues. Some spermatocytes have become fusiform and thenumber of these cells has been increased, dose dependently. There were many spermatocyes at the metaphasestage, among 100 and 150 mg/kg treated groups; Some of the mitotic figures, sperm, most of thespermatogonia and spermatocytes stained red with Acridine Orange, which indicats denaturation of DNAstrands. A few fragmented nuclei were also observed in the 150mg/kg treated group. In conclusion, it seemsthat extract of kiwi can change the spermatocyte cytoarchitecture and affects the spermatogonia andspermatozoa. It may exert dual effects on the proliferating cells, such as spermatogenesis linage. In lowconcentrations it could induce proliferation, and in high concentrations, it may lead to cell death and nucleusfragmentation. The extract may elongate the period of the metaphase.
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https://ijsts.shirazu.ac.ir/article_2727_26c97fe51e0d168eb241689ef18f7805.pdf
dx.doi.org/10.22099/ijsts.2006.2727
TERATOGENIC EFFECTS OF A NEW QUINAZOLINONE DERIVATIVE ON THE DEVELOPMENT OF BALB/C MICE FETUSES ON DAYS 9 10 AND 11 OF GESTATION
M.
SHAMS LAHIJANI
1Department of Biology, Faculty of Science, Shahid Beheshti University, Tehran, I. R. of Iran
author
F.
AHMADZADEH
Department of Biology, Faculty of Science, Shahid Beheshti University, Tehran, I. R. of Iran
author
M.
DABIRI
Department of Chemistry, Faculty of Science, Shahid Beheshti University, Tehran, I. R. of Iran
author
text
article
2006
eng
For the first time, a spectrum of morphological abnormalities have been produced in developingmouse embryos (N=50), by injecting (IP) 75 and 100 mg/kg of maternal body weight of a new quinazolinonederivative, 4(3H)quinazolinone-2-propyl-2-phenylethyl(QPPE), on days 9, 10 and 11 of gestation.Measurements of the length of the crown-rump (CR), weight of body of the embryos and placenta on day 17showed significant growth retardation (P<0.05) with day 9 being the critical day. The severity of the changeswas dependent on the concentrations of quinazolinone, as higher doses created more abnormal embryos(syndactily, scaphocephaly, exocephaly, microcephaly, acrocephaly, abnormal polarity in lower and upperlimbs, deviation of body axis, growth retardation) and placentas. Apparently QPPE acts on organogenesis ona specific phase of the developmental stage by expressing genes regulating mitosis and cell proliferation.
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https://ijsts.shirazu.ac.ir/article_2729_4a72f3f5b0f13b93fb29be3e475dbf57.pdf
dx.doi.org/10.22099/ijsts.2006.2729
“LAG” A NEW CLASSIFICATION SYSTEM FOR CONCEALED MINERAL EXPLORATION
S.
ALIPOUR
Department of Geology, University of Urmia, Urmia, I. R. of Iran
author
text
article
2006
eng
Lag is a general term applied to coarse grained (> 2 mm), hard, but partially weathered rockfragments, which are concentrated at the surface through attrition of finer materials. Based on morphology,mineralogy and the origin of lag from the Cobar region of Australia, lag may be conveniently grouped intothree broad morpho-mineralogical categories; (a) those with a rough, blocky, lithic morphology where fabricsof the parent rock are partially preserved and which evolved predominantly in erosional landforms, (b) asmoother pisoid lag, with a well-developed varnish or polished surface, which is most abundant in deeplyweathered, erosional and depositional landforms, and (c) a detrital lag evolving in a range of situations andwhich is generally more abundant in Quaternary modern drainage landforms. Based on chemistry andmagnetic character, two distinct types of magnetic and non-magnetic lag are readily recognised. The magnetictype may include both pisoid and occasionally lithic and ferrolithic pregnant with maghemite. Analysis forvarious trace elements indicates a drastic difference in their chemistry and anomaly detection ability.Magnetic lags contain anomalous Fe, Pb and other heavy metals, while lithics were enriched Cu, Zn and Mn.Spatially, magnetic lag have broader distribution compared to the lithic fraction, which is concentrated closeto its original source. These unique characters of lag, revealing weak anomalies in covered surfaces and itsabundance in relation to the erosional and depositional landforms, make them a preferred sampling media ingeochemical exploration. The chemical data suggest that the magnetic lag fraction is more useful inreconnaissance exploration, and non-magnetics for follow-up work to locate mineralisation, which mayjustify partitioning a lag sample prior to analysis.
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https://ijsts.shirazu.ac.ir/article_2730_b71822ae429b961b0da609ed357091f2.pdf
dx.doi.org/10.22099/ijsts.2006.2730
THE EFFECTS OF DIFFERENT CONCENTRATIONS OF CADMIUM ON THE GROWTH RATE AND BETA-CAROTENE SYNTHESIS IN UNICELLULAR GREEN ALGAE DUNALIELLA SALINA
M.
SHARIATI
Department of Biology, University of Isfahan, Isfahan, I. R. of Iran
author
S.
YAHYAABADI
Department of Biology, University of Isfahan, Isfahan, I. R. of Iran
author
text
article
2006
eng
The individual effects of cadmium concentrations (0, 0.005, 0.05and 0.5 mg. L-1) on the growth(cell number and chlorophyll content) and beta-carotene synthesis of two strains (Iranian and Australian) ofgreen algae D.salina have been studied for a duration of 36 days. The effects of these cadmiumconcentrations on the amount of cell magnesium and calcium have also been evaluated. An increase incadmium concentration resulted in a significant reduction in the cell number and chlorophyll content of D.salina. In comparison with control, in both strains, the increase of beta-carotene content of cells was observedin the first few days of the experiment, moreover, the amount of magnesium and calcium in cells decreased.The results indicated that the addition of 0.5 mg. L-1 of cadmium in the medium results in a 50 percentreduction in cell number after 96h. The decrease in growth rate and the increase in beta-carotene content ofcells is probably due to the formation of free radicals and deficiency of essential elements such as magnesiumand calcium, which is caused by high concentrations of cadmium in the medium.
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https://ijsts.shirazu.ac.ir/article_2731_3ce5e13407428278bc88791dbf58af50.pdf
dx.doi.org/10.22099/ijsts.2006.2731
THE CRYSTAL AND MOLECULAR STRUCTURE OF 2-HYDROXYBENZYALDEHYDE O, O (1, 4-DIOXOBUTANE-1, 4-DIYL) OXIME, C16H13N2O6
B.
ETEMADI
1Dept. of Earth Sciences, Shiraz University, Shiraz, I. R. of Iran,
author
A.
TAEB
Dept. of Chemical Engineering, Iran University of Science and Technology, Tehran, I. R. of Iran
author
H.
SHARGHI
Dept. of Chemistry, Shiraz University, Shiraz, I. R. of Iran
author
A.
TAJARODI
Dept. of Chemical Engineering, Iran University of Science and Technology, Tehran, I. R. of Iran
author
M.
HOSSEINI
Dept. of Chemistry, Shiraz University, Shiraz, I. R. of Iran
author
text
article
2006
eng
C16H13N2O6, Mr=239.30, Monoclinic, P21/n, a=7.6088(3), b=9.0108 (4), c=11.2161(6)A,β =100.3633(4) , V=759.90(6)A3, Z=2, Dx=1.446g/cm3, Dm=1.450g/cm3, λ (MoKα )=0.71007A,T=293K, R=0.044, Rw=0.043 for 1295 observed reflections. The crystals were prepared by slow evaporationtechnique. A directed hydrogen bond is associated with the asymmetric part of the molecule between O1---H1... N1 of 2.601A. The ring system is planar and the molecules are held together by vander Waals forces.
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https://ijsts.shirazu.ac.ir/article_2732_354aa16c3c7a942126644c7406880a89.pdf
dx.doi.org/10.22099/ijsts.2006.2732
SURVIVAL AND ACTIVITY OF LUX-MARKED PHENANTHRENE-DEGRADING PSEUDOMONAS STUTZERI P16 UNDER DIFFERENT CONDITIONS
M.
MASHREGHI
Biotechnology and Tissue Engineering Research Center, Faculty of Sciences, Ferdowsi University of Mashhad,
Mashhad, I. R. of Iran,
author
J. I.
PROSSER
Department of Molecular and Cell Biology, Institute of Medical Sciences,
University of Aberdeen, Aberdeen, UK
author
text
article
2006
eng
Viable cell concentration and luminescence activity of P. stutzeri P16 luxAB4 was measured byplate counting and luminometery in sterile and non-sterile soil adjusted to matric potential of -1500, -750 and-30 kPa. Results showed that matric potential had a significant effect on survival and activity of P. stutzeriP16 luxAB4 in soil. P. stutzeri P16 luxAB4 could survive better in Hutner’s minimal medium supplementedwith 1mg l-1 phenanthrene than 1 mg ml-1. However changes in viable cell concentration and luminescenceactivity of lux-marked and wild type strains of P. stutzeri P16 were significantly different in Hutner’smedium, amended with high and low concentrations of phenanthrene. Inoculation of soil with highconcentrations of phenanthrene caused an initial decline in the viable cell concentration of P. stutzeri P16luxAB4 that took a longer time than liquid medium. Changes in viable cell concentration were similar tochanges in luminescence indicating the advantage of Bioluminescence-marker systems for monitoring thesurvival and activity of biodegradative genetically engineered microorganisms (GEMs) in pollutedenvironments. Our results also showed the importance of influence of environmental factors such as matricpotential and pollutant concentration on the fate of GEMs.
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https://ijsts.shirazu.ac.ir/article_2733_a1be624d4dd004af83ac005455bc4373.pdf
dx.doi.org/10.22099/ijsts.2006.2733
CYTOGENETIC STUDIES IN ELEVEN CANOLA (BRASSICA NAPUS L.) CULTIVARS
M.
SHEIDAI
1 Biology Department, Shahid Beheshti University, Tehran, I. R. of Iran
author
Z.
NOORMOHAMADI
Genetic Department, Tarbeiyat Modarres University, Tehran, I. R. of Iran
author
text
article
2006
eng
Meiotic study was performed in 11 Brassica napus cultivars considering chiasma frequency anddistribution, chromosome pairing, as well as the occurrence of B-chromosomes and their effects on chiasmafrequency. Such cytogenetic pairing, along with agronomic characteristics, may be used in planninghybridization among the B. napus cultivars. All the cultivars studied possessed n=19 chromosome number(4x) and showed a deviant course of prophase-I meiosis with a synezetic knot and post pachytene diffusestage. Chromosome stickiness occurred in most of the cultivars from early prophase to late telophase-IIleading to the formation of laggard chromosomes and micronuclei. The cultivars studied differed significantlyin chiasma frequency and distribution as well as bivalent formation, indicating their genomic differences.Cluster analysis and ordination based on principal components analysis grouped those cultivars showingmeiotic similarities. Some of the cultivars showed the occurrence of B-chromosomes.
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https://ijsts.shirazu.ac.ir/article_2734_33f97fd1808f2b6e99112b5585360d87.pdf
dx.doi.org/10.22099/ijsts.2006.2734
IDENTIFICATION AND GENETIC VARIATION OF FUSARIUM SPECIES IN ISFAHAN, IRAN, UNING PECTIC ZYMOGRAM TECHNIQUE
G. R
BALALI
Deparment of Biology, University of Isfahan, Isfahan, I. R. of Iran
author
M.
IRANPOOR
Deparment of Biology, University of Isfahan, Isfahan, I. R. of Iran
author
text
article
2006
eng
The genus Fusarium is a species rich genus. Different media are required to study themorphological characters and classify different species, a time consuming technique. In this study pecticzymograms were used to identify species and form species of Fusarium isolates. Fusarium isolates (318) wereobtained from different areas and hosts in Isfahan Province, Iran. Isolates were identified to species based onmorphological characters. A pectic enzyme solution was prepared for each isolate using liquid mediacontaining citrus pectin as the sole carbon source. Electrophoresis was performed using acrylamide gelcontaining 0.2% citrus pectin as the enzyme substrate. The gels were incubated in 0.1M malic acid beforestaining overnight in 0.02% ruthenium red, to visualize enzyme electrophoretic patterns. Several zymogramphenotypes were obtained for polygalacturonase and pectin esterase. In total, 12 zymogram patterns weredetermined for the 318 isolates tested. The results showed that there is considerable intraspecific variation inFusarium species. There were 3, 5 and 2 zymogram electrophoretic patterns for Fusarium oxysporum, F.solani and F. culmorum respectively. However, there was only one zymogram pattern for F. subglutinans andalso one for F. equiseti. Although the intraspecific variation based on pectic zymograms was not correlated tothe form species of Fusarium, species of Fusarium could be distinguished using this technique as there wasno common zymogram pattern among species.
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https://ijsts.shirazu.ac.ir/article_2735_400750634344d44fbf60844152a84f77.pdf
dx.doi.org/10.22099/ijsts.2006.2735
CHROMOSOME PAIRING AND HETEROZYGOTE TRANSLOCATION IN OLTAN COTTON CULTIVAR AND ITS CROSSING PROGENIES
M.
SHEIDAI
Biology Department, Shahid Beheshti University, Evin, Tehran, I. R. of Iran
author
A.
GOLESTANIPOOR
Biology Department, Sistan & Baloochestan University, Zabole, I. R. of Iran
author
E.
JORJANI
Biology Department, Sistan & Baloochestan University, Zabole, I. R. of Iran
author
text
article
2006
eng
A cytogenetic study was performed on 11 tetraploid cotton cultivars (Gossypium hirsutum L.)including the Oltan cultivar and its crossing progenies. The chromosome pairing and chiasma frequency, aswell as meiotic abnormalities were compared among the genotypes studied. Heterozygote translocations withalternate orientation were observed between some of the chromosomes of the A genome and those of Dgenome in some of the cultivars, which may bring about new genetic rearrangement to be used in breedingprograms. Meiotic abnormalities including formation of laggard chromosome, stickiness, as well asdisorganized chromosomes occurred in some of the cultivars, which may cause pollen sterility. Bchromosomeswere observed in some of the cultivars. The cultivars studied differed significantly in theircytogenetic characteristics, partly indicating their genomic differences, which may be used in cotton breeding.
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109
https://ijsts.shirazu.ac.ir/article_2737_8a188ddaa9ed5814362ff82f6b2d7ae2.pdf
dx.doi.org/10.22099/ijsts.2006.2737
FLUORINE AND CHLORINE IN BIOTITE FROM THE SARNWOSAR GRANITIC ROCKS, NORTHEASTERN IRAN
M.
BOOMERI
Dept. of Geology, University of Sistan and Baluchestan, Zahedan, I. R. of Iran
author
T.
MIZUTA
Institute of Applied Science, Akita University, Akita, Japan
author
D.
ISHIYAMA
Institute of Applied Science, Akita University, Akita, Japan
author
K.
NAKASHIMA
Dept. of Earth Sciences, Faculty of Science, Ymagata University, Yamagata, Japan
author
text
article
2006
eng
The late Eocene-early Oligocene Sarnowsar granitic rocks and many dacitic to rhyolitic dykesintruded in metamorphosed and metasomatized shale, sandstone, calcite and dolomite marbles andvolcaniclastic and pyroclastic rocks. As a result several million tons of iron ores formed within carbonaterocks in the Sangan area. The Sarnowsar granitic rocks are mainly granite to granodiorite, metaluminous, Itype and high calc-alkaline.Fluorine contents in the biotite range from 0.37 to 4.4 wt. % and Cl contents range from 0.1 to 0.30 wt.%. Fluorine contents in the biotite are negatively correlated with XTi, while Cl contents positively correlatedwith XMg and XSi.Values of the calculated log (ƒH2O/ƒHF) and log (ƒH2O/ƒHCl) of fluid in equilibrium with thechemical composition of biotite range from 3.38 to 4.43 and 0.57 to 1.2, respectively. The contour linesrepresenting log (ƒH2O/ƒHF) and log (ƒH2O/ƒHCl) values are different with the slope of the trend of biotitecomposition suggesting that, in addition to chemical structure of biotite, the fluid composition also playssome role in the incorporation of F, and especially Cl in biotite. The F intercept values for biotite in theSarnowsar granitic rocks are similar to those of igneous rocks and porphyry Cu ore deposits. The Cl interceptvalues of biotite in the Sarnowsar granitic rocks are similar to those of hydrothermal and ore forming systems.The data suggest that chlorine intercept values for biotite from the Sangan deposit tend to be more Cl richthan comparable values from biotites in common igneous rocks. F-rich biotites and F-poor biotites from theSangan deposit show similar and narrow ranges of F/Cl intercept values corresponding to Cl-rich and oreformingsystems such as porphyry copper deposits. Therefore, the chemical composition of biotite from theSarnowsar granitic rocks interacted with hydrothermal solutions.
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https://ijsts.shirazu.ac.ir/article_2738_f090301a802409326bd5e1666a5b52e4.pdf
dx.doi.org/10.22099/ijsts.2006.2738
THE OCCURRENCE AND ORIGIN OF ATOLL GARNET IN HORNBLENDE SCHISTS FROM THE CONTACT AUREOLE OF THE MASHHAD GRANITE, NE IRAN
S. M.
HOMAM
Faculty of Earth Sciences, Damghan University of Basic Sciences
Cheshmeh-Ali Road Damghan, I. R. of Iran
author
text
article
2006
eng
The formation of atoll garnet in hornblende schists from the contact aureole of Mashhad granite,NE Iran, is discussed using textural and chemical data. These data suggest the possibility of incipientreplacement of pre-existing idioblastic garnet from the core. In addition, the presence of chlorite and calcite inthe core of atoll garnet reveal the retrograde nature of atoll formation.
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https://ijsts.shirazu.ac.ir/article_2740_16f21a0f5827d7126f8278eaec0482d4.pdf
dx.doi.org/10.22099/ijsts.2006.2740
EMBRYONIC SURFACE CILIATED CELLS IN ELEUTHERODACTYLUS URICHI (ANURA: LEPTODACTYLIDAE)
M.
NOKHBATOLFOGHAHAI
Biology Department, Faculty of Sciences, University of Shiraz, Shiraz, I. R. of Iran, 71454
author
text
article
2006
eng
While our knowledge of anuran embryonic and larval surface ciliation and their diversity ofciliation patterns are significant, very few references were noticed on embryonic ciliation in direct-developinganurans, such as species in the genus Eleutherodactylus. Eleutherodactylus urichi embryos were found tohave surface ciliated cells during much of their development until a few days before hatching. Ciliation wasmost prominent on the pharyngeal region and on the tail fins, both regions believed to have a respiratory role,and supporting the hypothesis that embryonic ciliation in amphibians serves principally to aid respiration bymoving intracapsular fluid. The limb-buds were also well ciliated, an evolutionary novelty since in mostanurans with a tadpole stage, surface ciliation regresses before limbs show significant development.
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https://ijsts.shirazu.ac.ir/article_2742_b48996133ac6f8ea6f2f669543e84098.pdf
dx.doi.org/10.22099/ijsts.2006.2742