نتایج جستجو برای: 2007 62 2
تعداد نتایج: 2665291 فیلتر نتایج به سال:
Star formation efficiency in translucent molecular clouds has long been an unresolved and key issue in the field of low-mass star formation. In this paper, we report on the results of our survey for low-mass star formation in high-Galactic latitude molecular clouds, especially those of the translucent category, based on the ROSAT All-Sky Survey. Nine new weak-line T Tauri star candidates have b...
Two new highly oxidized humulane sesquiterpenes, mitissimols D (1) and E (2) were isolated from the fruiting bodies of Lactarius mitissimus. Their structures were elucidated using extensive spectroscopic techniques including 1D and 2D NMR spectra.
7 Abstract Algebra 1 7.1 Binary Operations on Sets . . . . . . . . . . . . . . . . . . . . 1 7.2 Commutative Binary Operations . . . . . . . . . . . . . . . . 2 7.3 Associative Binary Operations . . . . . . . . . . . . . . . . . . 2 7.4 Semigroups . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 7.5 The General Associative Law . . . . . . . . . . . . . . . . . . 4 7.6 Identity elements...
A new nucleosidyl-peptide antibiotic, sansanmycin, was isolated from an unidentified Streptomyces sp SS. The structure of sansanmycin was elucidated by analyses of its alkaline hydrolysate and spectroscopic analyses. Sansanmycin exhibits antibacterial activity against Mycobacterium tuberculosis H37Ra and Pseudomonas aeruginosa with MIC values of 10 and 12.5 mg/ml, respectively.
Aiming to provide a new class of game dynamics with good long-term rationality properties, we derive a second-order inertial system that builds on the widely studied “heavy ball with friction” optimization method. By exploiting a well-known link between the replicator dynamics and the Shahshahani geometry on the space of mixed strategies, the dynamics are stated in a Riemannian geometric framew...
We present information on the distribution of the endemic Bolivian primates Callicebus olallae and C. modestus based on a series of site visits in the Beni Department. Callicebus olallae was registered at four localities and C. modestus at 11 localities, and in combination with negative data and localities for other Callicebus species in the region we defined the distributional boundaries for b...
Immune system is the most complex and important system of the body. The knowledge and understanding of immunomodulatory factors is of vital importance as it may help the individual in making efforts to improve and strengthen it. This article deals with the appraisal of the role of psychosocial factors in the modulation of human immune functions.
Databases are typically stored in one of two formats. A horizontal representation, as shown above, is indexed by transaction ID and stores items in each transaction. A vertical representation, on the other hand, is indexed by item and stores transactions that each item occurs in. Different algorithms are tuned to work with different representations. In this lecture, we will focus on horizontal ...
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