Aims. The detection of c-C3HC2H and possible future c-C3HCN provide new molecules for reaction chemistry in the dense interstellar medium (ISM) where R-C2H R-CN species are prevalent. Determination chemically viable derivatives their prominent spectral features can accelerate potential astrophysical this chemical family. This work characterizes three such derivatives: c-C3(C2H)2, c-C3(CN)2, c-C...

ABSTRACT Cyanamide (NH2CN) and its isomer, carbodiimide (HNCNH), may form adenine in the interstellar medium (ISM) via a series of reactions. Therefore, they are considered key prebiotic molecules study origin life. We used three-phase NAUTILUS chemical code, which includes gas, dust surface, icy mantle, to investigate formation destruction cyanamide carbodiimide. added over 200 new reactions t...

the adhesion molecules are involved in adhesion of leukocytes to endothelial cells and other immune cells. not only adhesion molecules have membrane form, but they also have soluble form. in this paper, we attempted to investigate the concen¬tration of soluble adhesion molecules in the type 1 diabetic patients (n = 40) and healthy subjects (n = 10). the results indicated that there was an incre...

Electron attachment to NCCCCN, dicyanoacetylene (2-butynedinitrile), has been observed. Metastable parent anions, NCCCCN , with microsecond or longer lifetimes are formed close to 0 eV electron energy with a cross ∗ section of ≥0.25 . The stability of NCCCCN suggests that radiative attachment to NCCCCN and similar ∗ Å linear carbon chain molecules may be an important mechanism for the formation...

Silicon-bearing species of the molecular formula SiCHx (x 1⁄4 1 6) are plausible candidates for organometallic molecules that might be present in the circumstellar envelope of IRC +10216. Combining matrix-isolation laboratory experiments with computed vibrational spectra of these molecules, we have observed several fundamentals of the new silicon-containing radicals SiCH3 and SiCH5, in addition...

Deuterium enrichment of interstellar methanol is reproduced experimentally for the first time via grain-surface H-D substitution in solid methanol at an atomic D/H ratio of 0.1. Although previous gas-grain models successfully reproduce the deuterium enrichments observed in interstellar methanol molecules (D/H of up to 0.4, compared to the cosmic ratio of ∼10), the models exclusively focus on de...

We have conducted a survey of the CCS JN = 32 − 21 line toward 11 dark clouds and star-forming regions at 30 spatial resolution and 0.054 km s velocity resolution. CCS was only detected in quiescent clouds, not in active star-forming regions. The CCS distribution shows remarkable clumpy structure, and 25 clumps are identified in 7 clouds. Seven clumps with extremely narrow nonthermal linewidths...

virial theorem is important for understanding stellar structures. it produces an interesting connection between magnetic and gravitational energies. using the general form of the virial theorem including the magnetic field (toroidal magnetic field), we may explain the solar dynamo model in relation to variations of the magnetic and gravitational energies. we emphasize the role of the gravitatio...