دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
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30798
FA
B.
Sharifizadeh
H.
Ebrahimzadeh
M.
Izadpanah
Sh.
Zarre
V.
Niknam
Journal Article
1970
01
01
The present study is the first comparative study of some Trigonella
species from Iran, reporting the seed protein content and possible use
of SDS-PAGE profile of seed proteins in the Trigonella taxonomy.
Quantitative analysis of seed proteins of the species and putative
populations of Trigonella showed that content of proteins varied from
23.52 to 46.6% D.W. where the lowest protein content in T. monantha
and the highest protein content in T. aphanoneora . The proteins
content of seeds in most of the wild species of Trigonella was higher
than that of T. foenum-graecum L. (29.93% D.W.). The
electrophoretic patterns of seed proteins were compared for correct
identification of the species. The electrophoretic profile varied among
some putative populations of a single species. Overall, this study
showed the quantitative and qualitative differences among the studied
species and putaive populations. The values of seed protein
electrophoretic profiles in the taxonomy of Trigonella species are
discussedThe present study is the first comparative study of some Trigonella
species from Iran, reporting the seed protein content and possible use
of SDS-PAGE profile of seed proteins in the Trigonella taxonomy.
Quantitative analysis of seed proteins of the species and putative
populations of Trigonella showed that content of proteins varied from
23.52 to 46.6% D.W. where the lowest protein content in T. monantha
and the highest protein content in T. aphanoneora . The proteins
content of seeds in most of the wild species of Trigonella was higher
than that of T. foenum-graecum L. (29.93% D.W.). The
electrophoretic patterns of seed proteins were compared for correct
identification of the species. The electrophoretic profile varied among
some putative populations of a single species. Overall, this study
showed the quantitative and qualitative differences among the studied
species and putaive populations. The values of seed protein
electrophoretic profiles in the taxonomy of Trigonella species are
discussedThe present study is the first comparative study of some Trigonella
species from Iran, reporting the seed protein content and possible use
of SDS-PAGE profile of seed proteins in the Trigonella taxonomy.
Quantitative analysis of seed proteins of the species and putative
populations of Trigonella showed that content of proteins varied from
23.52 to 46.6% D.W. where the lowest protein content in T. monantha
and the highest protein content in T. aphanoneora . The proteins
content of seeds in most of the wild species of Trigonella was higher
than that of T. foenum-graecum L. (29.93% D.W.). The
electrophoretic patterns of seed proteins were compared for correct
identification of the species. The electrophoretic profile varied among
some putative populations of a single species. Overall, this study
showed the quantitative and qualitative differences among the studied
species and putaive populations. The values of seed protein
electrophoretic profiles in the taxonomy of Trigonella species are
discussed.
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
-
30799
FA
Elahe
Elahi
Razieh M.
Raie
Seid-Javad
Hosseini
Journal Article
1970
01
01
The chromosome number of Penaeus semisulcatus, which is
commonly known as the green tiger prawn and which lives in the
Persian Gulf, has been determined by three approaches and the
efficacies of these approaches have been compared. In one, various
tissues after intramuscular injection of colchicine, in another
embryonic cells and in the third blastema tissue regenerated after
amputation of a pair pereopods were used. All three approaches when
optimized were effective and their results suggest that the diploid
chromosome number of P. semisulcatus is 90. This figure falls within
the range of diploid chromosome numbers previously reported for
other species of shrimp (86 to 92). Most of the chromosomes of P.
semisulcatus are metacentric
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
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30800
FA
Amin ,
GH
Haeri Rohani ,
A
Nasri ,
S
Oryan ,
S
Yahyavi ,
H
Journal Article
1970
01
01
Usually, the side effects of synthetic drugs appear after a long time of
their usage. For that reason, these years, diseases treatment by herbal
drugs is very interested. In this study, regarding to the mentioned
purposes, we evaluate the effects of Vitex agnus castus L. (Vit.) fruit
extract on the activity of Pituitary- Gonadal axis in Balb/C male mice.
LD50 of the extract was obtained 1650 mg/kg. Regarding to the LD50
of the extract, the following doses (65, 165, 265, 365, 465 mg/kg)
were injected intraperitoneally for 30 days in 5 groups of animals.
After the last injection, we collected the blood samples and measured
FSH, LH and testosterone by Radio Immuno Assay (RIA) technique.
Vitex extract decreased the FSH, LH and testosterone levels
comparing to the control and sham groups. The optimum dose was
obtained 365 mg/kg. These results suggest that Vit. fruit extract has an
anti-androgenic effect and probably acts through the Hypothalamic-Pituitary-
Gonadal (HPG) axis
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
-
30801
FA
Alireza
Badiei
FatemehTousi
Ghodsi Mohammadi
Ziarani
Parviz
Norouzi
Journal Article
1970
01
01
The amount of cobalt (III) ions introduced into the mesopores has
been controlled by the concentration of the cobalt complex in the
exchange solution and the existing percentage of silanolate on the
surface. The obtained FTIR results show that a part of surfactants
retain in the channel during the ion exchange in absolute and dry
ethanol. The colour change during this process indicates that cobalt
undergoes substitution reactions within its coordination sphere. UV-visible
characterization, consistent with previous study of EXAFS
spectroscopy confirms this evolution providing a full description of
the complex. Several steps were identified for direct ion exchanged
reaction that is include electrostatic adsorption of complex into the
channel, formation of ion pair with macro-counter ion MTS, and
grafting step with substitution reaction of macro-ligand MTS by
formation of Co-O-Si bridge
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
-
30802
FA
Fereydoun
Ghazban
Journal Article
1970
01
01
Geologic and geochemical investigation in Mount Taftan indicates a viable
geothermal resource probably centered and upflowing beneath the volcano. This
volcanic region in SE Iran has a very high potential for generation of
geothermal energy. The presence of volcanos is intimately related to the
subduction of Neotethys oceanic lithosphere under the Central Iranian
continental plate. Magmatism in Mt. Taftan is represented by subalkaline
volcanics that vary from basaltic through andesitic to dacitic composition.
Springs with temperatures ranging from 10 to 35 °C are located in the prospect
area, fed by the sedimentary aquifers. Based on geochemical and hydrological
data, the thermal Cl-Ca-SO4 waters rise toward the surface from reservoirs made
up of a volcano-sedimentary sequence through faults and fractures. Fumerolic
and thermal discharges from this volcanic region contain deeply derived H2S
with subsequent oxidation to SO4 -2 in the system. Based on Na-K-Mg ternary
diagram, none of the discharge waters could be representative of deep fluids in
“full equilibrium” with the reservoir rocks. The acid alteration in the shallow
parts of Mt. Taftan results from the oxidation of H2S. Steam, accompanied by
H2S rises from depth and produces acid sulfate fluids, which react with the
surficial rocks to generate alteration mineral assemblages. The temperature
range established from alteration mineralogy, overlaps with that determined
from chemical geothermometers. The occurrence of hydrothermal alteration
minerals at the surface indicates a low to moderate geothermal system. Clay
mineral alteration assemblage encountered in Taftan geothermal system might
have been superimposed on older and higher-temperature stages. The
geothermal energy produced in the system is from the cooling magma, which is
heating circulating groundwater. The magma-heated water, which emerges at
the surface as fumerolic discharges and heats up the descending cold meteoric
water, signals the presence of the shallow heat source beneath Mt. Taftan
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
-
30803
FA
Ghadirian,
H.A
Hassanzadeh,
E
Journal Article
1970
01
01
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
-
30804
FA
Behnia,
P
Collins,
L.G
Darvishzadeh,
A
Journal Article
1970
01
01
Qooshchi granite has been intruded as an anorogenic, A type, within
plate granite in an area north west of Orumieh Lake in western
Azerbaijan, northwest Iran. The Precambrian crystalline basement has
been intruded by gabbros and diorites. The gabbros are tholeiitic and
metaluminous and are suggested to have been converted into alkalic
through calc-alkalic compositions during K- and Si-metasomatism.
The resulting granitic rocks (leucometasomatites) appear as apophyse-like
bodies within the gabbros and in the marginal parts of Qooshchi
granite. Any further rise in the temperature could have caused melting
of the metasomatized rocks and their subsequent recrystallization as
pink Qooshchi granite
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
-
30805
FA
D.
Dyrelius
Javan G.
Doloei
M.
Mokhtari
Journal Article
1970
01
01
A reflection seismogram can be represented as a convolution of a
source wavelet with a set of reflection coefficients. In a standard
model these coefficients are scalar and real impulses. For all plane
waves, displacements are phase shifted in post-critical angles. In this
case reflection coefficients can be complex and the scalar
deconvolution does not remove distortions perfectly. To overcome
this problem, it has been attempted to examine an analytical technique
[i.e. Analytic Minimum Information Deconvolution (AMID)] that can
remove distorted effects from seismograms. The necessary codes have
been written for applying AMID technique to synthetic and real data.
Using computer programs in seismology (Herrmann, 1996), the
necessary synthetic seismograms are generated for a specific
structural earth model. 10% random noise is added to the synthetic
seismograms and the output of AMID filter is investigated for
different source - receiver offsets. The results of this study shows the
ability of AMID for elimination of random noise and Moho phase
detection
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
-
30806
FA
Amir H.
Rezaie
Mir Aliakbar
Nogole-Sadat
Journal Article
1970
01
01
The Asmari Formation (Oligo-Miocene) is the major oil reservoir in Iran, and is
mainly composed of carbonate entities (Limestone and Dolomite). The Asmari
Formation produces almost 85 percent of total Iranian crude oil and it is one of
the main known reservoirs in the world. Therefore, the study of this rock unit
has been a critical subject in the past and present time. This formation is well
developed in the Zagros basin, southern Iran as well as in the Persian Gulf. It is
believed that the Asmari Formation has a good fracturing system, which is
resulted from the Red Sea opening and movement of Arabian Plate toward
Iranian platform in the Neogene geological time.
At the time being, these tectonic activities might be continued and create
some seismicity and earthquakes in this area, affecting shortening strata in the
edge of Arabian plate as well as the whole Zagros basin. One of the main
products of this process is fractures. These fractures are very important in the
Zagros basin for their effects in the production rate of Asmari reservoir (eg.
Rag-e Sefid oilfield).
The majority of studied wells of this oil-field have enough geological and
petrophysical data. Among studied wells, eight of them have Formation Micro
Scanner, FMS log data.
The purpose of this paper is to find out relation between Curvature of Asmari
Formation and fracturing system by using the FMS logs. Fortunately, this
method resulted in a good conclusion, which can be applied for the Zagros basin
especially, for Asmari Formation, having consistent with those of fracturing
system in Kuh-e Khaviz, Kuh-e Pahn and Kuh-e Asmari
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
-
30807
FA
A.
Rajabtabar
P.
Havvaie
Journal Article
1970
01
01
We adopt the general theory of Non-equilibrium thermodynamics to
the two-fluid Model of He-II. In this Model superfluid is considered
as a fluid of two-components each of with its own density and velocity
fields. In contrast to the earlier works, our model assumes that super-fluid
carries small entropy ( ), owing to the Fliessbach. Since the fluid
has two independent velocity fields, there is no preferred frame of
references and hence, no unique definition of internal energy. The
explicit forms of this quantity are worked out in different models and
compared with our definition of internal energy and Gibbs function.
The existing relation and unification together with the equivalency of
London and Landau’s theories is also introduced
دانشگاه تهران
بین المللی علوم (منتشر نمی شود)
5
0
2004
04
20
-
-
30808
FA
M.
Ganjali
Z. Rezaee
Ghahrodee
Journal Article
1970
01
01
A latent variable Markovian model is proposed for longitudinal binary
responses with dropout. In this model responses can easily be modeled
using probit, logit or any other link. Dropout model is parameterized
in such a way that parameters can be dynamically changed on time.
Some residuals are also presented. These residuals can be used in the
presence of informative dropout. The model is also used in an
application where the existence of side effects of using fluvoxamine (a
treatment for deregulation of serotonin in the brain) is the response of
interest