The redshift-distance relation. IXa - Reinterpretation of the Local Group deceleration data emphasizing the Kahn-Woltjer mass determination

1987 ◽  
Vol 317 ◽  
pp. 557 ◽  
Author(s):  
Allan Sandage
Keyword(s):  
Local Group ◽  
Mass Determination ◽  
Distance Relation

Mass Determination by Direct Measurement of Electron Scattering

1975 ◽  
Vol 33 ◽  
pp. 240-241
Author(s):  
M. K. Lamvik ◽  
A. V. Crewe
Keyword(s):  
Cross Section ◽  
Electron Scattering ◽  
Mass Density ◽  
Variable Mass ◽  
Scattering Cross Section ◽  
Mass Determination ◽  
Number Density ◽  
Cross Sectional ◽  
Thin Slice ◽  
Scattering Cross

If a molecule or atom of material has molecular weight A, the number density of such units is given by n=Nρ/A, where N is Avogadro's number and ρ is the mass density of the material. The amount of scattering from each unit can be written by assigning an imaginary cross-sectional area σ to each unit. If the current I0 is incident on a thin slice of material of thickness z and the current I remains unscattered, then the scattering cross-section σ is defined by I=IOnσz. For a specimen that is not thin, the definition must be applied to each imaginary thin slice and the result I/I0 =exp(-nσz) is obtained by integrating over the whole thickness. It is useful to separate the variable mass-thickness w=ρz from the other factors to yield I/I0 =exp(-sw), where s=Nσ/A is the scattering cross-section per unit mass.

The challenge of detecting modifications on proteins

2020 ◽  
Vol 64 (1) ◽  
pp. 135-153 ◽  
Author(s):  
Lauren Elizabeth Smith ◽  
Adelina Rogowska-Wrzesinska
Keyword(s):  
Mass Spectrometry ◽  
Protein Function ◽  
Chemical Properties ◽  
Lysine Acetylation ◽  
Mass Determination ◽  
Post Translational Modifications ◽  
Site Specific ◽  
The Common

Abstract Post-translational modifications (PTMs) are integral to the regulation of protein function, characterising their role in this process is vital to understanding how cells work in both healthy and diseased states. Mass spectrometry (MS) facilitates the mass determination and sequencing of peptides, and thereby also the detection of site-specific PTMs. However, numerous challenges in this field continue to persist. The diverse chemical properties, low abundance, labile nature and instability of many PTMs, in combination with the more practical issues of compatibility with MS and bioinformatics challenges, contribute to the arduous nature of their analysis. In this review, we present an overview of the established MS-based approaches for analysing PTMs and the common complications associated with their investigation, including examples of specific challenges focusing on phosphorylation, lysine acetylation and redox modifications.

Local Group Dynamics with GAIA

2002 ◽  
Vol 2 ◽  
pp. 305-311
Author(s):  
R. Ibata
Keyword(s):  
Group Dynamics ◽  
Local Group

ETHNIC CULTURE OF LAMUNKHINSKI EVENS AS A RESOURCE OF DEVELOPMENT OF TOURISM INDUSTRY OF YAKUTIA

2020 ◽  
Vol 4 (8(77)) ◽  
pp. 4-7
Author(s):  
Sardaana Anatolievna Alekseeva
Keyword(s):  
National Culture ◽  
Local Group ◽  
Tourism Industry ◽  
Cultural Development ◽  
Ethnic Tourism ◽  
Tourist Destinations ◽  
The North ◽  
Original Culture ◽  
The Village ◽  
Hunting And Fishing

When getting acquainted with the ethnic traditions of the peoples of Yakutia, special attention should be paid to the national culture of the evens as a small indigenous people of the North. Cultural and ethnographic features of Yakutia are one of the most important resources for the development of tourism. The main purpose of the work is to consider the potential of ethnic tourism on the example of the village of Sebyan-Kuel in the Кobyai district of Yakutia. The following specific ethnographic methods are used: the method of included observation and indepth interview. The result was that in this remote mountains of the Verkhoyansk ridge preserved the original culture of the local group Lamynkhinsky Evens, which is a unique, non-commodity, and, consequently, an inexhaustible resource for the economy, social and cultural development of the nasleg. In our opinion, the area of Lamynkhinsky nasleg can become one of the most popular tourist destinations due to its uniqueness in ethnic and extreme, ecological, hunting and fishing types of tourism.

The Stellar Content of the Local Group Dwarf Galaxy Phoenix

1999 ◽  
Vol 118 (2) ◽  
pp. 862-882 ◽  
Author(s):  
D. Martínez-Delgado ◽  
C. Gallart ◽  
A. Aparicio
Keyword(s):  
Local Group ◽  
Dwarf Galaxy ◽  
Stellar Content
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