New routes to cleanliness : nanocomposite coatings offer advantages over PTFE in food production

A new class of anti-adhesive coatings has been studied for potential use in industrial food production. They can be sprayed and cured at lower temperatures than current PTFE coatings. The polymer binder matrix incorporates perfluorinated comonomers and nanoscale hard particles. Polyurethane based systems gave the best abrasion and chemical resistance, but a polyimide-based system performed well in dry processing tests

Spezielle Silazanderivate von Digallan(4) und Diindan(4) mit Ga-Ga- bzw. In-In-Bindung

Al, Ga and In can easily be incorporated in the cyclic silazane (MeSi)2(NtBu)4H2(LH2) through formal substitution of the hydrogen atoms by the metallic elements. LAlMe, LAlCl, LGaCl, LInCl as well as the side product L(H)InCl2 are obtained in high yields. X-ray structure determinations confirm the molecules LAlMe and L(H)InCl2 to be polycyclic and the metallic atoms to be four-coordinated by intramolecular nitrogen donors. When LAlCl, LGaCl and LInCl are reduced by sodium naphthalene, in the two latter cases the formation of LGaGaL and LInInL is observed. An X-ray structure determination of LInInL shows an InIn bond of 2.768(1) A° with the two indium atoms being coordinated by three nitrogen atoms each (InN ranging from 2.12(1)-2.298(7) A°). LGaGaL and LInInL can be considered as the first amides of GaII and InII

A furanoditerpenoid from the liverwort Jamesoniella autumnalis

A new furanoditerpenoid, jamesoniellide C, has been isolated from the liverwort Jamesoniella autumnalis. The structure of jamesoniellide C was established by spectroscopic methods, including X-ray analysis which also established its relative stereochemistry

Novel C-35 terpenoids from the Panamarian liverwort Plagiochila Moritziana

A new class of C-35 terpenoids is described from Hepaticae: plagiospirolide A and plagiospirolide B, two novel heptacyclic spiro-terpenes were isolated from the Panamanian liverwort Plagiochila moritziana Lindbg. & Gott. Structures were determined by MS, extensive NMR studies and X-ray crystallographic analysis. The compounds may be biosynthesized by condensation of a sesquiterpenoid and a diterpenoid unit in a Diels-Alder like reaction

New routes to cleanliness : nanocomposite coatings offer advantages over PTFE in food production

A new class of anti-adhesive coatings has been studied for potential use in industrial food production. They can be sprayed and cured at lower temperatures than current PTFE coatings. The polymer binder matrix incorporates perfluorinated comonomers and nanoscale hard particles. Polyurethane based systems gave the best abrasion and chemical resistance, but a polyimide-based system performed well in dry processing tests

Spezielle Silazanderivate von Digallan(4) und Diindan(4) mit Ga-Ga- bzw. In-In-Bindung

Al, Ga and In can easily be incorporated in the cyclic silazane (MeSi)2(NtBu)4H2(LH2) through formal substitution of the hydrogen atoms by the metallic elements. LAlMe, LAlCl, LGaCl, LInCl as well as the side product L(H)InCl2 are obtained in high yields. X-ray structure determinations confirm the molecules LAlMe and L(H)InCl2 to be polycyclic and the metallic atoms to be four-coordinated by intramolecular nitrogen donors. When LAlCl, LGaCl and LInCl are reduced by sodium naphthalene, in the two latter cases the formation of LGaGaL and LInInL is observed. An X-ray structure determination of LInInL shows an InIn bond of 2.768(1) A° with the two indium atoms being coordinated by three nitrogen atoms each (InN ranging from 2.12(1)-2.298(7) A°). LGaGaL and LInInL can be considered as the first amides of GaII and InII

Novel C-35 terpenoids from the Panamarian liverwort Plagiochila Moritziana

A new class of C-35 terpenoids is described from Hepaticae: plagiospirolide A and plagiospirolide B, two novel heptacyclic spiro-terpenes were isolated from the Panamanian liverwort Plagiochila moritziana Lindbg. & Gott. Structures were determined by MS, extensive NMR studies and X-ray crystallographic analysis. The compounds may be biosynthesized by condensation of a sesquiterpenoid and a diterpenoid unit in a Diels-Alder like reaction

Peptide conjugate hydrogelators

Molecular gelators are currently receiving a great deal of attention. These are small molecules which, under the appropriate conditions, assemble in solution to, in the majority of cases, give long fibrillar structures which entangle to form a three-dimensional network. This immobilises the solvent, resulting in a gel. Such gelators have potential application in a number of important areas from drug delivery to tissue engineering. Recently, the use of peptide-conjugates has become prevalent with oligopeptides (from as short as two amino acids in length) conjugated to a polymer, alkyl chain or aromatic group such as naphthalene or fluorenylmethoxycarbonyl (Fmoc) being shown to be effective molecular gelators. The field of gelation is extremely large; here we focus our attention on the use of these peptide-conjugates as molecular hydrogelators

Endovascular Aortic Repair: The Renal Side of the Story

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