Insect juvenile hormones and their bioanalogues

1989 ◽  
Vol 54 (9) ◽  
pp. 2302-2329 ◽  
Author(s):  
Zdeněk Wimmer ◽  
Miroslav Romaňuk
Keyword(s):  
Aromatic Ring ◽  
Insect Pests ◽  
Biological Properties ◽  
Optically Active ◽  
Insect Development ◽  
Recent Information ◽  
Structural Types ◽  
Juvenile Hormones ◽  
Present Trend ◽  
The Given

This survey supplements and up-dates review articles of other authors published in the field of substances affecting the development of the insect, juvenoids. Attention has been paid primarily to such structures as deserved more detailed investigation in the given field owing to their biological properties, further to less known structures and facts, and lastly to the most recent information from literature, mainly paying attention to the present trend in searching for structural types of substances affecting insect development. The synthetic juvenoids discussed are divided into chapters, on the basis of the skeleton of the molecule, on aliphatic juvenoids, juvenoids with one aromatic ring in the molecule and finally juvenoids with two and more cycles (aromatic as well as non-aromatic) in the molecule. Certain attention has also been paid to optically active juvenoids. Finally the role is mentioned of complex hormonogen compounds, juvenogens, in the protection of cultured plants against economically important insect pests.

scholarly journals The importance of sanitary microbiological indices in the evaluation of epidemiological safety of water use in conditions of chemical contamination of water

2019 ◽  
Vol 95 (10) ◽  
pp. 934-938 ◽  
Author(s):  
Yu. A. Rakhmanin ◽  
L. V. Ivanova ◽  
T. Z. Artemova ◽  
E. K. Gipp ◽  
Anzhelika V. Zagainova ◽  
...  
Keyword(s):  
Water Use ◽  
Inhibitory Effect ◽  
Biological Properties ◽  
Chemical Substance ◽  
Water Bodies ◽  
Chemical Pollution ◽  
Chemical Contamination ◽  
Natural Conditions ◽  
The Impact ◽  
The Given

The increasing chemicalization of production and life leads to the pollution of water bodies by chemicals, the effect of which on the micro - and macro - organisms is poorly understood. This section of the study in sanitary bacteriology is becoming ever more topical and is an important task of modern hygienic science. One of complicacies of the study of the problem is related with the fact that the presence of only experimental data fails to be sufficient, as the impact of any given chemical substance on different bacteria in the experiment does not mean that under natural conditions, similar results will be obtained. One reason for this may be the inhibitory effect of the given chemical on biological properties of bacteria, while in field conditions in the water several chemicals interacting with each other can exist. In this regard, the aim of the work was to assess the indicator value of sanitary and microbiological indices of epidemic hazard of water use in conditions of chemical pollution of surface water bodies.

Variations on a Cage Theme: Some Complexes of Bicyclic Polyamines as Supramolecular Synthons

2009 ◽  
Vol 62 (10) ◽  
pp. 1246 ◽  
Author(s):  
Ian J. Clark ◽  
Alessandra Crispini ◽  
Paul S. Donnelly ◽  
Lutz M. Engelhardt ◽  
Jack M. Harrowfield ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Aromatic Ring ◽  
Oxidation State ◽  
Metal Ion ◽  
Intermolecular Forces ◽  
Optically Active ◽  
Alphabetical Order ◽  
Supramolecular Synthons ◽  
Π Stacking ◽  
Parallel Arrays

Dedication: One of Alan Sargeson’s great abilities was to seek out knowledge on topics of which he was not the master from those people with the expertise. This led occasionally to publications with a ‘cricket team’ of authors but with a rich brew of information, often international. Alan also insisted that all authors were equal since, without any one, the paper would not be what it was. Hence, he endeavoured to pursue the policy, difficult to maintain over a period where an obsession with absurdities such as the order of authors and point-scoring based on meaningless publication indices became so important in the maintenance of research, of listing authors simply in alphabetical order. In describing work begun while he was still with us, we have attempted to adhere to his principles. Analysis of a body of crystallographic information concerning metal(ii) and metal(iii) complexes of macrobicyclic hexamine ligands and some of their derivatives provides evidence for the action of a variety of intermolecular forces within the lattices. Hydrogen bonding is universal and its forms depend strongly upon the oxidation state and the particular nature of the metal ion bound to the macrobicycle. The introduction of both aliphatic and aromatic substituents leads to lattices in which these substituents associate, although, in the case of aromatic substituents, this is not necessarily a consequence of ‘π-stacking’, despite the fact that the aromatic ring planes form parallel arrays. At least in the case of CoIII, stable enantiomers of the complexes can be obtained, and in {Δ-(+)589-[Co{(NH3)(CH3)sar}]}2Cl2(C6(CO2)6)·26H2O (sar = 3,6,10,13,16,19-hexa-azabicyclo[6.6.6]icosane), the benzene hexacarboxylate anion adopts a chiral conformation in the presence of the optically active cation.

scholarly journals Chemistry and Biological Activity of Alkaloids from the Genus Lycoris (Amaryllidaceae)

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4797
Author(s):  
Lucie Cahlíková ◽  
Kateřina Breiterová ◽  
Lubomír Opletal
Keyword(s):  
Biological Activity ◽  
Biological Properties ◽  
Present Review ◽  
Cholinesterase Inhibition ◽  
Eastern Asia ◽  
Amaryllidaceae Alkaloids ◽  
Structural Types ◽  
Temperate Woodlands ◽  
Warm Temperate ◽  
Small Genus

Lycoris Herbert, family Amaryllidaceae, is a small genus of about 20 species that are native to the warm temperate woodlands of eastern Asia, as in China, Korea, Japan, Taiwan, and the Himalayas. For many years, species of Lycoris have been subjected to extensive phytochemical and pharmacological investigations, resulting in either the isolation or identification of more than 110 Amaryllidaceae alkaloids belonging to different structural types. Amaryllidaceae alkaloids are frequently studied for their interesting biological properties, including antiviral, antibacterial, antitumor, antifungal, antimalarial, analgesic, cytotoxic, and cholinesterase inhibition activities. The present review aims to summarize comprehensively the research that has been reported on the phytochemistry and pharmacology of the genus Lycoris.

scholarly journals Approaches and Tools to Study the Roles of Juvenile Hormones in Controlling Insect Biology

Insects ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 858
Author(s):  
Fernando G. Noriega ◽  
Marcela Nouzova
Keyword(s):  
Rna Interference ◽  
Genome Editing ◽  
The Other ◽  
Corpora Allata ◽  
Insect Development ◽  
Juvenile Hormones ◽  
Insect Biology ◽  
Detection And Quantification

The juvenile hormones (JHs) are a group of sesquiterpenoids synthesized by the corpora allata. They play critical roles during insect development and reproduction. To study processes that are controlled by JH, researchers need methods to identify and quantify endogenous JHs and tools that can be used to increase or decrease JH titers in vitro and in vivo. The lipophilic nature of JHs, coupled with the low endogenous titers, make handling and quantification challenging. JH titers in insects can easily be increased by the topical application of JH analogs, such as methoprene. On the other hand, experimentally reducing JH titers has been more difficult. New approaches to modulate JH homeostasis have been established based on advances in RNA interference and CRISPR/Cas9-based genome editing. This review will summarize current advances in: (1) the detection and quantification of JHs from insect samples; (2) approaches to manipulating JH titers; and (3) next-generation tools to modulate JH homeostasis.

Biological properties of prolactin-releasing peptide analogs with a modified aromatic ring of a C-terminal phenylalanine amide

Peptides ◽  
2011 ◽  
Vol 32 (9) ◽  
pp. 1887-1892 ◽  
Author(s):  
Lenka Maletínská ◽  
Andrea Špolcová ◽  
Jana Maixnerová ◽  
Miroslava Blechová ◽  
Blanka Železná
Keyword(s):  
Aromatic Ring ◽  
Biological Properties ◽  
Peptide Analogs ◽  
Prolactin Releasing Peptide

THE POLYOXYPHENOLS OF WESTERN RED CEDAR (THUJA PLICATA DONN.): I. ISOLATION AND PRELIMINARY CHARACTERIZATION OF PLICATIC ACID

1959 ◽  
Vol 37 (10) ◽  
pp. 1703-1709 ◽  
Author(s):  
J. A. F. Gardner ◽  
G. M. Barton ◽  
Harold Maclean
Keyword(s):  
Aromatic Ring ◽  
Optically Active ◽  
The Other ◽  
Thuja Plicata ◽  
Molecular Formula ◽  
Preliminary Characterization ◽  
Red Cedar ◽  
Western Red Cedar ◽  
Thuja Plicata Donn

An amorphous, optically active, heat and light sensitive, polyoxyphenolic acid (pKa = 3) has been isolated from the mixture of polyoxyphenols present in the aqueous extractive of western red cedar. Analyses of crystalline derivatives are consistent with a molecular formula of C20H22O10. Color tests, spectra, methylation, and alkaline nitrobenzene oxidation results indicate it to be a propylphenol dimer, a lignan acid, in which one aromatic ring is 3-methoxy-4-hydroxyphenyl and the other is 3,4-dihydroxy-5-methoxyphenyl. Acetylation results and lactone formation require the presence of three alcoholic hydroxyls, one of which is in the γ position to the carboxyl.

scholarly journals Pathogenicity of a bovine viral diarrhoea virus strain in pregnant sows: Short communication

2001 ◽  
Vol 49 (1) ◽  
pp. 117-120 ◽  
Author(s):  
G. Kulcsár ◽  
P. Soós ◽  
L. Kucsera ◽  
R. Glávits ◽  
V. Pálfi
Keyword(s):  
Virus Strain ◽  
Clinical Symptoms ◽  
Classical Swine Fever ◽  
Bovine Viral Diarrhoea Virus ◽  
Biological Properties ◽  
Asymptomatic Infection ◽  
Bovine Viral Diarrhoea ◽  
Diarrhoea Virus ◽  
The Given ◽  
Virus Strains

The biological properties of bovine viral diarrhoea virus (BVDV) strain Oregon C24V were studied after intranasal and subcutaneous infection of pregnant sows. This virus strain is widely used in Hungary for immunising cattle against bovine viral diarrhoea (BVD). Based upon the results of the clinical, gross pathological, histopathological and virological examinations it can be established that the given strain caused asymptomatic infection and serological conversion in sows that were in the second third of gestation. The virus caused clinically apparent disease in some of the piglets born at term, which indicates that it had crossed the placenta. More than half (57%) of the live-born piglets died within 60 days of birth. The sows and their progeny did not shed the virus. BVDV infection has great differential diagnostic importance in pigs, as classical swine fever (CSF) virus strains of reduced virulence cause similar clinical symptoms and gross and histopathological changes.

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