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981.
Leila M. Lopes-Alves Lucia Mendonça-Previato Bernard Fournet Pierre Degand José O. Previato 《Glycoconjugate journal》1992,9(2):75-81
-Elimination of peptidorhamnomannans purified from yeast-like and mycelial phases ofSporothrix schenckii released neutral and acidic reduced oligosaccharides that were O linked to serine and/or threonine. Man-(1–2)Man-ol, Rha(1–3)Man(1–2)Man-ol, Rha(1–4)GlcA(1–2)Man(1–2)Man-ol, and Rha(1–4)[Rha(1–2)] GlcA(1–2)Man(1–2)Man-ol were characterized based on methylation analysis, proton magnetic resonance and fast atom bombardment mass spectrometry.Abbreviations FAB
fast atom bombardment
- GLC
gas liquid chromatography
- GlcA
d-glucopyranosyluronic acid
- Man
d-mannopyranose
- Man-ol
d-mannitol
- MS
mass spectrometry
- NMR
nuclear magnetic resonance
- Rha
l-rhamnopyranose 相似文献
982.
Leila V. Alegrio Raimundo Braz Fo. Otto R. Gottlieb J.Guilherme S. Maia 《Phytochemistry》1981,20(8):1963-1965
A re-examination of the trunk wood of Licaria armeniaca led to the isolation of 6,7-dimethoxycoumarin, 1,2,3-trimethoxy-7-oxoaporphine (tri-O-methylmoschatoline, 2e-(3,4,5-trimethoxyphenyl)-6e-(3,4-dimethoxyphenyl)-3,7-dioxabicyclo [3.3.0]octan (magnolin) and a novel neolignan (7S,8R,1′S,2′S,3′S)-2′-acetoxy-1′-allyl-3′,5′-dimethoxy-8-methyl-7-piperonyl-bicyclo [3.2.1]-oct-5′- en-4′-one. 相似文献
983.
Leila Risteli Juha Risteli Annegret Ihme Thomas Krieg Peter K. Müller 《Biochemical and biophysical research communications》1980,96(4):1778-1784
Normal and Ehlers-Danlos syndrome type VI human skin and cornea fibroblasts were assayed for lysyl hydroxylase activity using two different collagen types as substrates. The enzyme from normal fibroblasts hydroxylated type I collagen more readily than type IV collagen. In the diseased cells the enzyme activity was significantly reduced, and the residual activity was preferentially directed towards type IV collagen. This suggests the existence of isoenzymes of lysyl hydroxylase or an alteration in the Ehlers-Danlos syndrome type VI that affects the binding of type I collagen more than that of type IV collagen. 相似文献
984.
A new species,Sphaeromeria ruthiae, from Zion National Park, and three new combinations,S. martirensis,S. compacta, andS. potentilloides var.nitrophila, are presented. Morphological and anatomical evidence is used to support the recognition ofSphaeromeria as distinct fromTanacetum. 相似文献
985.
986.
Hadia Elhadi Slama Amor Romdhane Leila Cheikh M’Hamed Hatem Fahej Mohamed Ali Saed Radhouane Leila 《Journal of Plant Growth Regulation》2023,42(1):304-318
Journal of Plant Growth Regulation - Salt stress is a main factor limiting the production and productivity of wheat in arid and semi-arid zones. The objectives of this study were to compare the... 相似文献
987.
Shaida Mahmoudi Mohamad Javad Chaichi Mojtaba Shamsipur Ome Leila Nazari Abdolraouf Samadi-Maybodi 《Luminescence》2023,38(10):1711-1719
Atropine (AT) is an anticholinergic drug. AT is abundantly in Datura plant seeds. Fe3O4@Zn/Mg MOF (Fe3O4@MOF) composite was synthesized. The compound had a high peroxidase-like activity in a chemiluminescence (CL) reaction. Addition of AT quenched CL. The linear range and limit of detection were 5–600 μg L−1 and 2 × 10−2 μg L−1. This method is fast, reversible, and selective, without biodegradability effects, high accuracy, and precision for measuring AT in the Datura plant. 相似文献
988.
In the Atlantic Montane Rain Forest of south-eastern Brazil, a field study was carried out to describe the forest disturbance
regime, analyse canopy gap composition and evaluate the influence of habitat parameters on gap tree species composition. We
characterized canopy gaps considering the group of variables as follows: area, type and number of tree/branch falls, topographic
position, soil coverage and surrounding canopy trees. Gap composition was assessed at species level by measuring all individuals
inside gaps higher than one meter. Mean gap area of the 42 canopy gaps analysed was 71.9 ± 9.0 m2 (mean ± SE). Out of the
studied gaps, 35.7% were created by uprooted and by snapped trees, 16.7% by dead-standing trees and 11.9% by the fall of large
branches. The disturbance regime was characterized by gap openings predominantly smaller than 150 m2 and by spatial patterning
related to topography. Ridges had smaller gaps and higher proportions of gaps created by branch falls; slopes had bigger gaps
generally created by uprooting events. The more abundant and frequent species were shade tolerant and the more species-rich
families found inside gaps did not differ from the forest as a whole. Pioneer species were rare and restricted to medium and
large size classes. The Indicator Species Analysis and the Canonical Correspondence Analysis indicated gap area, topography
and the percentage of soil cover by the genera Calathea and Ctenanthe were the predominant variables correlated with woody species distribution. So, topography emerged as an important issue not
only to the gap disturbance regime, but also to gap colonization. In respect to the influence of gap processes on the Atlantic
Montane Rain Forest regeneration, our results support the view that canopy gap events may not be working as promoters of community
wide floristic shifts. 相似文献
989.
Bicudo TC Bicudo RC Forato LA Beltramini LM Batista LA Filho RB Colnago LA 《Biopolymers》2008,89(3):175-178
The proline-rich N-terminal domain of gamma-zein has been reported in relevant processes, which include its ability to cross the cell membranes. Evidences indicate that synthetic hexapeptide (PPPVHL), naturally found in N-terminal portion of gamma-zein, can adopt the polyproline II (PPII) conformation in aqueous solution. The secondary structure of gamma-zein in maize protein bodies had been analyzed by solid state Fourier transform infrared and nuclear magnetic resonance spectroscopies. However, it was not possible to measure PPII content in physiological environment since the beta-sheet and PPII signals overlap in both solid state techniques. Here, the secondary structure of gamma-zein has been analyzed by circular dichroism in SDS aqueous solution with and without ditiothreitol (DTT), and in 60% of 2-propanol and water with DTT. The results show that gamma-zein has high helical content in all solutions. The PPII conformation was present at about 7% only in water/DTT solution. 相似文献
990.
Xavier Gigandet Patric Hagmann Maciej Kurant Leila Cammoun Reto Meuli Jean-Philippe Thiran 《PloS one》2008,3(12)