scholarly journals Helix-mediated over 1 nm-range chirality recognition by ligand-to-ligand interactions of dinuclear helicates

2021 ◽  
Author(s):  
Natsumi Suko ◽  
Hideki Itamoto ◽  
Yoshinori Okayasu ◽  
Naoya Okura ◽  
Junpei Yuasa
Keyword(s):  
Long Range ◽  
Lanthanide Complexes ◽  
Ligand Interactions ◽  
Nm Range

Long-range chirality recognition between the two chiral guest ligands can be tuned based on the helix distance (dLn-Ln = 11.5 and 14.0 Å) of bis-diketonate bridged dinuclear lanthanide complexes (2Th...

scholarly journals SYNTHESIS, SPECTRAL CHARACTERIZATION AND ANTIFUNGAL STUDIES ON LANTHANUM (III) AND PRASEODYMIUM (III) COMPLEXES WITH N2O2DIAZADIOXAMACROCYCLES

2020 ◽  
Vol 8 (11) ◽  
pp. 01-10
Author(s):  
Priti Tripathi ◽  
◽  
Akhilesh Kumar Srivastava ◽  
Om Prakash Pandey ◽  
Soumitra Kumar Sengupta ◽  
...  
Keyword(s):  
Particle Size ◽  
Biological Activity ◽  
Antifungal Activity ◽  
Schiff Bases ◽  
Lanthanide Complexes ◽  
Scherrer Formula ◽  
In Vitro Antifungal Activity ◽  
Nm Range

A novel series of N2O2diazadioxamacrocyclic complexes of type [Ln(mac)Cl3] has been synthesized via the condensation reactions of a 3-(phenyl/substituted phenyl)-4-amino-5-hydrazino-1,2,4-triazoles with salicylaldehyde and 1,4-dibromobutane in the presence of lanthanum(III) chloride and praseodymium(III) chloride in ethanol. All the newly synthesized compounds were characterized by elemental analysis, electronic absorption, IR, 1HNMR. The particle size of the complexes have been calculated from XRD spectral using Debye-Scherrer formula and these are found to be in 29-31 nm range. In order to evaluate the biological activity of Schiff bases and to assess the role of Ln(III) and Pr(III) metal on biological activity, the hydrazine triazole Schiff bases and their lanthanide complexes have been studies for in vitro antifungal activity against Fusariumoxysporum, CurvularialunataandColletotrichumfalcatum.

FIELD STUDIES OF THE HOST RANGE OF THE CITRUS BLACKFLY, ALEUROCANTHUS WOGLUMI (HOMOPTERA: ALEYRODIDAE)

1979 ◽  
Vol 111 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Robert V. Dowell ◽  
F. W. Howard ◽  
R. H. Cherry ◽  
G. E. Fitzpatrick
Keyword(s):  
Host Range ◽  
Long Range ◽  
Plant Material ◽  
Host Plants ◽  
Field Studies ◽  
Field Surveys ◽  
Ovipositional Behavior ◽  
Aleurocanthus Woglumi ◽  
Preferred Hosts ◽  
Nm Range

AbstractWe studied the ovipositional behavior of the citrus blackfly (CBF), Aleurocanthus woglumi Ashby, and found several plant species (mango, pink trumpet, and kumquat) to be as attractive as Citrus spp to ovipositing CBF at low densities. There is a significant (P < 0.01) positive correlation between the attractiveness of various host plants in our tests and the frequency of CBF occurrence on these plants in field surveys The host range of CBF increases with increasing CBF density. Oviposition by CBF on preferred hosts appears to occur at all CBF densities and is independent of their frequency in the environment We also found that CBF adults appear to be attracted to plant material reflecting light in the 500–600 nm range and it appears that this is the only long-range attractant operative.

Long-range attraction and molecular rearrangements in receptor-ligand interactions

Science ◽  
1992 ◽  
Vol 255 (5050) ◽  
pp. 1419-1421 ◽  
Author(s):  
D. Leckband ◽  
J. Israelachvili ◽  
F. Schmitt ◽  
W Knoll
Keyword(s):  
Long Range ◽  
Receptor Ligand ◽  
Molecular Rearrangements ◽  
Ligand Interactions

New insights into heparan sulphate biosynthesis from the study of mutant mice

2002 ◽  
Vol 69 ◽  
pp. 47-57 ◽  
Author(s):  
Catherine L. R. Merry ◽  
John T. Gallagher
Keyword(s):  
Growth Factors ◽  
Biosynthetic Pathway ◽  
Heparan Sulphate ◽  
Mutant Mice ◽  
Gene Products ◽  
Multiple Gene ◽  
Adhesion Proteins ◽  
Ligand Interactions

Heparan sulphate (HS) is an essential co-receptor for a number of growth factors, morphogens and adhesion proteins. The biosynthetic modifications involved in the generation of a mature HS chain may determine the strength and outcome of HS–ligand interactions. These modifications are catalysed by a complex family of enzymes, some of which occur as multiple gene products. Various mutant mice have now been generated, which lack the function of isolated components of the HS biosynthetic pathway. In this discussion, we outline the key findings of these studies, and use them to put into context our own work concerning the structure of the HS generated by the Hs2st-/- mice.

Activated CD4+ T cells enriched from spleen or colon induce apoptosis in intestinal epithellal cells via fas/fas ligand interactions

2001 ◽  
Vol 120 (5) ◽  
pp. A192-A192
Author(s):  
H TAKAISHI ◽  
T DENNING ◽  
K ITO ◽  
R MIFFLIN ◽  
P ERNST
Keyword(s):  
T Cells ◽  
Cd4 T Cells ◽  
Fas Ligand ◽  
Ligand Interactions
Sign in / Sign up

Export Citation Format

Share Document