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1.
We present the results of a spectral study of Galaxy No. 47 of the list [1]. We determine the equivalent widths of the lines for the compact part of the galaxy and the relative intensities for both the compact part and the halo. We estimate the mass of the galaxy from the inclination of the H line. We obtain the electron density and the mass of the gas component of the compact part of the galaxy.Translated fromAstrofizika, Vol. 38, No. 2, 1995. 相似文献
2.
We present the results of a study of circumstellar dust envelopes of 36 stars of early(O-B-A) types in the directions of the associations Cas OB1, Cas OB2, Per OB1, and Ori OB1. We determine the absorption at 1640 Å, the linear radius of the dust envelopes, the mean value of the coefficient k, and the masses of the envelopes. They differ significantly from one another.Translated fromAstrofizika, Vol. 38, No. 3, 1995. 相似文献
3.
Humic substances exposed to solar light play the role of photosensitizers in aquatic photochemical processes, generating free
radicals during UV and visible light irradiation. During irradiation, high molecular weight structures are destroyed and low
molecular weight constituents are formed. Alterations of the humic acids metal binding capacity due to their photochemical
alterations occur. The present work reports controlled laboratory experimental results on the binding of copper by a certified
purified peat humic acid (PPHA) before and after irradiation in a laboratory scale photoreactor. A reference curve of copper
binding by photochemically unaltered humic acid was experimentally determined as a function of solution pH by potentiometric
titrations. The experimental data series correspond to a pH range from 3 to 8.5, necessary for the simultaneous consideration
of complexation and metal species solubility contribution in the obtained results. From the experimental results, it was apparent
that copper is strongly bound by humic acid even at the acidic range of pH where the percentage of copper bound reached 60
and 95% at pH values of 3.5 and 5.5, respectively. During 12 and 20 days of irradiation experiments, humic acid photoalteration
was experimentally monitored by a size exclusion chromatography system (HPLC-SEC). From the potentiometric titrations of the
irradiated humic acid solutions by a copper selective electrode, it was apparent that the copper binding capacity of photoaltered
humic acid solutions was significantly reduced for pH values up to 6. 相似文献
4.
E. L. Karapetyan 《Astrophysics》2006,49(3):299-305
Spectral observations of 19 galaxies with UV-excesses from Kazarian’s list are reported. The spectra were obtained with the
2.6-m telescope at the Byurakan Observatory using the SCORPIO spectral camera. A grism was used to obtain spectra in the wavelength
interval λλ7420-3920 Å. 43 spectra in which emission lines are mainly observed were obtained from the 19 galaxies, except
for the spectra of Kaz 21, Kaz 178, Kaz 183, and Kaz 184. The spectra of Kaz 17, Kaz 151, Kaz 153, and Kaz 357 have type Sy2
galactic features. In the spectra of the galaxies Kaz 17, Kaz 151, and Kaz 153, absorption lines are observed along with high
excitation emission lines such as HeI λ5876 Å and HeII λ4686 Å. No lines were observed within the interval λλ7420-3920 Å in
the spectra of the galaxies Kaz 183 and Kaz 184.
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Translated from Astrofizika, Vol. 49, No. 3, pp. 351–358 (August 2006). 相似文献
5.
新疆煤炭资源赋存规律与资源潜力预测 总被引：2，自引：0，他引：2
新疆预测煤炭资源量虽居全国首位,但探明程度很低,仅为12%,煤炭资源分布极不均衡。依据构造控制、成煤时代及聚煤规律等因素,将新疆含煤地层划分为三大含煤地层区,即：准噶尔含煤地层、塔里木含煤地层及昆仑山―喀喇昆仑山含煤地层区。依据早―中侏罗世的聚煤作用与古地理环境、古构造的关系,可将三大含煤地层区再划分为13个赋煤带,进而细分出60个煤田（煤产地、煤矿点）。通过对13个赋煤带含煤地层与构造的研究,对新疆煤炭资源勘查开发潜力作出评价,认为新疆煤炭资源量潜力巨大,有很好的勘查开发利用前景。 相似文献
6.
Astrophysics - Spectra taken with the 2.6-m telescope at the Byurakan Astrophysical Observatory (BAO) in the λλ4000-7250Å range for eight M giants from the KP2001 catalog confirm... 相似文献
7.
J. K. Karapetyan 《Seismic Instruments》2013,49(4):307-314
The problem of curve construction for dynamic coefficient β(T, n) based on the integral parameter of ground motion (cumulative absolute velocity (CAV)) is described. Comparative analysis of the curves β(T, n), obtained by maximum values of ground motion acceleration and via cumulative absolute velocity application, is carried out. The characteristic properties of changes in the considered dynamic coefficient curves are revealed and investigated. 相似文献
8.
Bioavailability and toxicity of antimony 总被引：1，自引：0，他引：1
Antimony (Sb) is a toxic trace element widely distributed in the lithosphere and mainly associated with arsenic. Sb compounds are considered to be pollutants of high interest, however, the biogeochemical behaviour of Sb is still largely unknown, especially compared to other well-known toxic elements. In particular, questions remain about the availability of Sb to vascular plants. In this work, we focused on the following problems: (i) Sb uptake by plants; (ii) the availability of Sb to plants and (iii) variations in uptake and distribution of essential plant nutrients and trace elements resulting from bioaccumulation of Sb in Triticum aestivum (wheat) seedlings. The seedlings were either germinated or grown in media enriched with Sb. By the end of germination, concentrations of Sb in the seedlings germinated in Sb-amended media increased significantly. Sb content was highest in the roots and lowest in the leaves of the seedlings. After transfer of the seedlings germinated in an Sb-free medium to Sb-enriched media, Sb concentration in the seedlings increased with time, especially in the roots. Bioaccumulation of Sb influenced concentrations of different macro- and trace elements in all parts of the plants. The least variations were observed in the leaves, probably because the increase of Sb concentration in leaves was not as significant as in the seeds and roots. 相似文献
9.
The results of a spectral study of the galaxy Kaz 17 are presented. 150 lines are identified in its spectrum, of which 21
are in emission while the rest are absorption lines. These lines belong to the following elements and ions:..... and FeI.
Roughly 56% of the absorption lines belong to FeI. Of the absorption lines, 10 belonging to TiI and FeI are isolated. Because
of the closeness of their wavelengths, the rest merge and form separate absorption bands. 10 lines, including 8 emission lines,
are unidentified in the spectrum of Kaz 17. In all, 160 lines were observed in the spectrum of Kaz 17. In terms of the structure
of the emission lines, Kaz 17 can be assigned to type Sy1, and in terms of the absorption lines, it more closely resembles
a normal galaxy.
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Translated from Astrofizika, Vol. 49, No. 4, pp. 541–551 (November 2006). 相似文献
10.