منابع مشابه
Ordering of dipeptide chains on Cu surfaces through 2D cocrystallization.
We report on the induced ordering of dispersed chiral diphenylalanine (Phe-Phe) chains grown on the anisotropic Cu(110) and isotropic Cu(100) surfaces. Scanning tunneling microscopy (STM) data reveal that 2D extended hybrid molecular motifs can be fabricated by utilizing terephthalic acid (TPA) molecules as linkers. These act as a molecular "glue" to bridge the isolated Phe-Phe chains without a...
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In this paper, a two-echelon supply chain, which includes two products based on the following considerations, has been studied and the bullwhip effect is quantified. Providing a measure for bullwhip effect that enables us to analyze and reduce this phenomenon in supply chains with two products is the basic purpose of this paper. Demand of products is presented by the first order vector autoregr...
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Versatile synthetic strategies that access diverse chemical substrates in a highly chemoand stereoselective manner are crucial but demanding. Construction of chiral molecules with multiple (hetero)quaternary carbon stereocenters in a single fashion is a particularly significant challenge, with important applications in the synthesis of a range of bioactive compounds containing the 1,4-sulfur br...
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We consider the minimum number of zeroes in a 2m 2n (0; 1)-matrix M that contains no m n submatrix of ones. We show that this number, denoted by f(m; n), is at least 2n + m + 1 for m n. We determine exactly when this bound is sharp and determine the extremal matrices in these cases. For any m, the bound is sharp for n = m and for all but nitely many n > m. A general upper bound due to Gentry, f...
متن کاملSynthesis of 5 - Methoxycarbonyl - 1 l - methylfuro ( 2 , 3 - c ) acridan - 6 ( 11 H ) ones
The plant family Rutaceae is known [1, 2] to be a prolific source of furoquinoline and pyranoquinoline alkaloids. Along with them acridine alka loids [3, 4] have also been isolated from several members of the same plant family. Recently furanfused acridine systems such as 1 l-methylfuro(2,3-c)acridan-6(l lH)one (1) have also been reported [5-7] to occur in some rutaceous plants. Typical exampl...
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ژورنال
عنوان ژورنال: French-Ukrainian Journal of Chemistry
سال: 2019
ISSN: 2312-3222
DOI: 10.17721/fujcv7i2p111-119