eng
University of Tehran
Journal of Sciences, Islamic Republic of Iran
1016-1104
2345-6914
2003-03-01
14
1
31696
REOVIRUS GROWTH INHIBITION BY
ROTAVIRUS FOLLOWING COINFECTION
https://jsciences.ut.ac.ir/article_31696_0c6398f9363080aace42c02491627bb9.pdf
eng
University of Tehran
Journal of Sciences, Islamic Republic of Iran
1016-1104
2345-6914
2003-03-01
14
1
31697
EFFECTS OF INFLAMMATION AND H. PYLORI INFECTION ON EXPRESSION OF CD44 VARIANT EXONS IN GASTRIC TISSUE
https://jsciences.ut.ac.ir/article_31697_bf951916d8dca090c655274fb17eec01.pdf
eng
University of Tehran
Journal of Sciences, Islamic Republic of Iran
1016-1104
2345-6914
2003-03-01
14
1
31698
A FACILE SYNTHESIS
OF (S) – (-) – PROPRANOLOL
A one-pot synthesis of (S)-(-)-propranolol is reported. Zn(NO3)2/(+)-tartaric acid catalyzed enantioselective synthesis of (S)-(-)-propranolol via kinetic resolution of key intermediate ?-naphthyl glycidyl ether with high optical and chemical yield.
https://jsciences.ut.ac.ir/article_31698_fc043ad01abf1ff8853689fea8048fff.pdf
eng
University of Tehran
Journal of Sciences, Islamic Republic of Iran
1016-1104
2345-6914
2003-03-01
14
1
31699
IMPROVED CHROMATOGRAPHIC METHOD FOR DETERMINATION OF SODIUM DICLOFENAC IN INJECTABLE SOLUTION AND PREDICTION
OF CHEMICAL STABILITY
Two modified methods for assaying sodium diclofenac were developed by GC and HPLC. Diclofenac was converted into methyl ester derivative by methyl iodide in acetone. The ester was extract and subjected to GLC with flame ionization detector. %5 SE-30/chrom W-HP (80-100 mesh) was used as a column in GC. For reversed phase HPLC, the mobile phase was methanol and water (55-45). The separation was performed on an analytical 300×3.9 mm i.d. ?-bondapak phenyl column using UV detector (274 nm). O-(4-chlorobenzoyl)benzoic acid and mefenamic acid were used as internal standard for GC and HPLC method respectively. The stability of diclofenac was examined by results obtained from two chromatographic methods at high temperature. The described HPLC and GC methods were successfully applied for the prediction of the shelf life period of diclofenac.
https://jsciences.ut.ac.ir/article_31699_6334572fa49958efef381bd28f465422.pdf
eng
University of Tehran
Journal of Sciences, Islamic Republic of Iran
1016-1104
2345-6914
2003-03-01
14
1
31700
CONCENTRATION VARIATIONS OF MAJOR AND MINOR ELEMENTS ACROSS VARIOUS ALTERATION ZONES IN PORPHYRY COPPER DEPOSIT AT SUNGUN, EAST AZARBAIDJAN, IRAN
https://jsciences.ut.ac.ir/article_31700_3989117aa2dd5b7c9f38262890149727.pdf
eng
University of Tehran
Journal of Sciences, Islamic Republic of Iran
1016-1104
2345-6914
2003-03-01
14
1
31701
MODELLING THE As-Au ASSOCIATION IN HYDROTHERMAL GOLD MINERALIZATION: EXAMPLE OF ZARSHURAN DEPOSIT, NW IRAN
https://jsciences.ut.ac.ir/article_31701_fce6247a6753c5c71634683a529aacd0.pdf
eng
University of Tehran
Journal of Sciences, Islamic Republic of Iran
1016-1104
2345-6914
2003-03-01
14
1
31702
A MODEL FOR MIXED CONTINUOUS AND DISCRETE RESPONSES WITH POSSIBILITY OF MISSING RESPONSES
A model for missing data in mixed binary and continuous responses, which can be used on cross-sectional data, is presented. In this model response indicator for the binary response can be dependent on the continuous response. A closed form for the likelihood is found. For data with a complicated pattern of missing responses some new residuals are also proposed. The model of multiplicative heteroscedasticity is used to consider the problem of heteroscedasticity of the continuous response. The model is illustrated on the data of an observational study where the effect of psychological disorder of parents on both the verbal comprehension score and the presence of adverse symptoms in their children are modeled in the presence of missing responses.
https://jsciences.ut.ac.ir/article_31702_d29a3c6d4e96864a5a391068512c0a51.pdf
eng
University of Tehran
Journal of Sciences, Islamic Republic of Iran
1016-1104
2345-6914
2003-03-01
14
1
31703
EMPIRICAL BAYES ANALYSIS OF TWO-FACTOR EXPERIMENTS UNDER INVERSE
GAUSSIAN MODEL
A two-factor experiment with interaction between factors wherein observations follow an Inverse Gaussian model is considered. Analysis of the experiment is approached via an empirical Bayes procedure. The conjugate family of prior distributions is considered. Bayes and empirical Bayes estimators are derived. Application of the procedure is illustrated on a data set, which has previously been analyzed by other authors.
https://jsciences.ut.ac.ir/article_31703_61308d138dbbf8427583a8a06aaeaa53.pdf
eng
University of Tehran
Journal of Sciences, Islamic Republic of Iran
1016-1104
2345-6914
2003-03-01
14
1
31704
OPTICAL PROPERTIES OF THIN Cu FILMS AS A FUNCTION OF SUBSTRATE TEMPERATURE
Copper films (250 nm) deposited on glass substrates, at different substrate temperatures. Their optical properties were measured by ellipsometery (single wavelength of 589.3 nm) and spectrophotometery in the spectral range of 200–2600 nm. Kramers Kronig method was used for the analysis of the reflectivity curves of Cu films to obtain the optical constants of the films, while ellipsometery measurement was carried out as an independent method. The influence of substrate temperature on the microstructure of thin metallic films [Structure Zone Model (SZM)] is well established. The Effective Medium Approximation (EMA) analysis was used to establish the relationship between the SZM and EMA predictions. Good agreements between SZM as a function of substrate temperature and the values of volume fraction of voids obtained from EMA analysis, are obtained; by increasing the substrate temperature the separation of the metallic grains decreases hence the volume fraction of voids decreases and denser films are formed. The unusual (anomalous) behavior of the void fraction as a function of wavelength for different substrate temperatures, in certain wavelength region is explained to be due to the roughness value of the film surface. This value corresponds to this wavelength region scattering from the surface roughness. This phenomenon may be used as a technique for surface roughness measurement.
https://jsciences.ut.ac.ir/article_31704_cafea64d0dfedfd1871a300bfcc616b5.pdf