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  • amine
  • 2. The derivative of claim 1 wherein at least 50 percent of the amine groups in the polyglucosamine are free amine groups. (google.com)
  • 2. A fuel composition according to claim 1 wherein said amine derivative is of the general formula ##STR8## wherein Z represents the number 1 to 2, X can be the same as or different from Y with the proviso that each of X and Y is selected from the following types of substituents consisting of a --OH group, a --OH. (google.com)
  • 9. An amine derivative according to claim 2 wherein X represents the number 2 and R represents an alkyl group of 12 to 24 carbons. (google.com)
  • Because cyanate esters are more reactive than are cyclic imidocarbonates, the amine will react mostly with the ester, yielding isourea derivatives, and partially with the less reactive imidocarbonate, yielding substituted imidocarbonates. (wikipedia.org)
  • To ensure that the resin is protonated and positively charge, the chromatography should be performed at least 2 pH units below the pKa of the amine group, 10. (wikipedia.org)
  • adsorption
  • The ability for CDAs to separate chiral molecules is dependent on two major mechanisms of chromatography: Differential solvation in the mobile phase Differential adsorption to the stationary phase Helmchen's Postulates are the theoretical models used to predict the elution order and extent of separation of diastereomers (including those formed from CDAs) that are adsorbed onto a surface. (wikipedia.org)
  • cyclopropane
  • Dimethylsulfonium ions and derived ylide species were shown to be the actually oxidizing species according to trapping methodology using lipophilic olefins which were converted into the corresponding cyclopropane and epoxide derivatives. (springer.com)
  • compounds
  • In comparison to the free cyclopentenone derivatives, the esterified forms occur in a 149-fold excess supporting the hypothesis that galactolipids might function as storage compounds for cyclopentenones. (frontiersin.org)
  • nucleic
  • Gel matrix beads are derivatized with diethylaminoethanol (DEAE) and lock negatively charged proteins or nucleic acids into the matrix. (wikipedia.org)
  • Dextran
  • In 1957, Porath discovered that columns filled with dextran gel could be used as "molecular sieves" to separate biomolecules by size. (wikipedia.org)
  • DEAE-Dextran (DEAE-D) is a positively charged dextran derivative that can be used for vaccine production, gene therapy, protein stabilization, dyslipidemia prevention, flocculating agents, and many other applications. (wikipedia.org)
  • solvent
  • All other previously known gel phase transitions have occurred as the result of temperature changes and only one previous case documents this type of solvent dependent morphological change. (wikipedia.org)
  • weak
  • The resin is a weak exchanger because it is only partially ionized over most pH values, and an efficient separation with DEAE-C chromatography requires a specific, narrow pH range. (wikipedia.org)
  • stability
  • The stability of a gel is dependent on the equilibrium between the assembled network and the dissolved gelators. (wikipedia.org)
  • molecular
  • Scanning Electron Microscopy is a useful means for researchers to determine the structural properties of a low molecular-mass weight gel. (wikipedia.org)
  • formula
  • 1. A piperazine derivative of the formula ##STR131## in which R.sup.1 represents, 4-methoxyphenyl, 4-chlorophenyl, 3-(trifluoromethyl)phenyl, 2-chloro-6-fluorophenyl or3-indolyl. (patentgenius.com)
  • various
  • Studies have shown esculeoside A may be metabolized into derivatives that perform various beneficial activities in the human body including anti-osteoporosis, anti-menopausal disorder and anti-tumor activities. (wikipedia.org)
  • form
  • The MGC is the lowest possible gelator concentration needed to form a stable gel. (wikipedia.org)
  • A lower MGC is desired to minimize the amount of gelator material needed to form gels. (wikipedia.org)
  • properties
  • Then attributes of foams obtained from boron-modified and unmodified hydroxypropyl urea derivatives were juxtaposed and some foams' properties were compared with other reference foams. (hindawi.com)
  • case
  • In this case the proposed "local" measure was derivative of logarithm of curvature: d d x log ⁡ ( κ ) = κ ′ κ {\displaystyle {\frac {d}{dx}}\log \left(\kappa \right)={\frac {\kappa '}{\kappa }}} However, in this case tortuosity of a straight line is left undefined. (wikipedia.org)
  • In 2005 it was proposed to measure tortuosity by an integral of square of derivative of curvature, divided by the length of a curve: τ = ∫ t 1 t 2 ( κ ′ ( t ) ) 2 d t L {\displaystyle \tau ={\frac {\int \limits _{t_{1}}^{t_{2}}{\left({\kappa '\left(t\right)}\right)^{2}}dt}{L}}} In this case tortuosity of both straight line and circle is estimated to be 0. (wikipedia.org)
  • common
  • Because of its simplicity and mild pH conditions, cyanogen bromide activation is the most common method for preparing affinity gels. (wikipedia.org)
  • Example
  • 2002) on the production of various derivatives of 9, 10- anthracenedione in plant cell cultures (Example: Rubia cordifolia, Rudgea jasminoides, Rubia tinctorum L, Morinda elliptica and Cinchona robusta). (thefreelibrary.com)
  • effects
  • 25I-NBOMe (2C-I-NBOMe, Cimbi-5) is a psychedelic drug and derivative of the substituted phenethylamine psychedelic 2C-I. NBOMe is a powerful hallucinogenic with only a small amount needed to cause effects. (equl.com)
  • include
  • Other synthetic routes include: controlled sol-gel processes, group transfer polymerization, transition metal catalysis, living anionic polymerization, living cationic polymerization, ring opening polymerization, ring-opening metathesis polymerization (ROMP), and controlled radical polymerization. (wikipedia.org)