scholarly journals Carbene-catalyzed enal γ-carbon addition to α-ketophosphonates for enantioselective access to bioactive 2-pyranylphosphonates

2018 ◽  
Vol 54 (47) ◽  
pp. 6040-6043 ◽  
Author(s):  
Jun Sun ◽  
Fangcheng He ◽  
Zhongyao Wang ◽  
Dingwu Pan ◽  
Pengcheng Zheng ◽  
...  
Keyword(s):  
Plant Protection ◽  
Carbon Addition ◽  
Potential Use

A carbene-catalyzed [4+2] reaction of enals and α-ketophosphonates is developed to afford chiral 2-pyranylphosphonates with potential use in plant protection.

Clonostachys rosea to control plant diseases

2021 ◽  
pp. 429-472
Author(s):  
Dan Funck Jensen ◽  
◽  
Mukesh Dubey ◽  
Birgit Jensen ◽  
Magnus Karlsson ◽  
...  
Keyword(s):  
Biological Control ◽  
Plant Protection ◽  
Control Plant ◽  
Plant Diseases ◽  
Bumble Bees ◽  
Key Factors ◽  
Clonostachys Rosea ◽  
Protection Strategies ◽  
Rhizosphere Competence ◽  
Potential Use

The fungus Clonostachys rosea was recognized as an aggressive parasite on other fungi already in the late 1950s. Research into its potential use in biological control of plant diseases soon followed. Today, there are several commercial products based on C. rosea available for biocontrol applications worldwide. Although its mycoparasitic ability has attracted a lot of interest, C. rosea is now viewed as an ecological generalist whose lifestyle also includes plant endophytism, rhizosphere competence and polyphagous ability. Protocols for producing high amounts of C. rosea spores are available for both solid state and liquid fermentation. Low temperature and low moisture content are key factors that influence the shelf life of C. rosea propagules. Products based on C. rosea can be delivered to flowers using bumble bees, applied by spraying or as seed dressing or by incorporation into the soil. Clonostachys rosea is today an established factor in sustainable plant protection strategies.

scholarly journals Biodegradable Blends of Grafted Dextrin with PLGA-block-PEG Copolymer as a Carrier for Controlled Release of Herbicides into Soil

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 832 ◽  
Author(s):  
Kamila Lewicka ◽  
Piotr Rychter ◽  
Małgorzata Pastusiak ◽  
Henryk Janeczek ◽  
Piotr Dobrzynski
Keyword(s):  
Controlled Release ◽  
Polymer Matrix ◽  
Enzymatic Degradation ◽  
Plant Protection ◽  
Degradation Products ◽  
The Matrix ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Unchanged Form ◽  
Potential Use

The presented work aimed to test influence of poly(L-lactide-co-glycolide)-block-poly (ethylene oxide) copolymer modification by blending with grafted dextrin or maltodextrin on the course of degradation in soil and the usefulness of such material as a matrix in the controlled release of herbicides. The modification should be to obtain homogenous blends with better susceptibility to enzymatic degradation. Among all tested blends, which were proposed as a carrier for potential use in the controlled release of plant protection agents, PLGA-block-PEG copolymer blended with grafted dextrin yielded very promising results for their future applications, and what is very importantly proposed formulations provide herbicides in unchanged form into soil within few months of release. The modification PLAGA/PEG copolymer by blending with modificated dextrins affects the improvement of the release profile. The weekly release rates for both selected herbicides (metazachlor and pendimethalin) were constant for a period of 12 weeks. Enzymatic degradation of modified dextrin combined with leaching of the degradation products into medium caused significant erosion of the polymer matrix, thereby leading to acceleration of water diffusion into the polymer matrix and allowing for easier leaching of herbicides outside the matrix.

scholarly journals The potential use of the Penicillium chrysogenum antifungal protein PAF, the designed variant PAF opt and its γ‐core peptide Pγ opt in plant protection

2020 ◽  
Vol 13 (5) ◽  
pp. 1403-1414 ◽  
Author(s):  
Liliána Tóth ◽  
Éva Boros ◽  
Péter Poór ◽  
Attila Ördög ◽  
Zoltán Kele ◽  
...  
Keyword(s):  
Penicillium Chrysogenum ◽  
Plant Protection ◽  
Antifungal Protein ◽  
Core Peptide ◽  
Potential Use

The growth of mica polytypes as studied by conventional and high-resolution TEM

1983 ◽  
Vol 41 ◽  
pp. 174-177
Author(s):  
A. Baronnet ◽  
M. Amouric
Keyword(s):  
Water Pressure ◽  
Point Of View ◽  
Temperature Fields ◽  
Natural Occurrence ◽  
Growth Mechanisms ◽  
Long Period ◽  
High Resolution Tem ◽  
Layer Stacking ◽  
Experimental Works ◽  
Potential Use

The origin of mica polytypes has long been a challenging problem for crystal- lographers, mineralogists and petrologists. From the petrological point of view, interest in this field arose from the potential use of layer stacking data to furnish further informations about equilibrium and/or kinetic conditions prevailing during the crystallization of the widespread mica-bearing rocks. From the compilation of previous experimental works dealing with the occurrence domains of the various mica "polymorphs" (1Mr, 1M, 2M1, 2M2 and 3T) within water-pressure vs temperature fields, it became clear that most of these modifications should be considered as metastable for a fixed mica species. Furthermore, the natural occurrence of long-period (or complex) polytypes could not be accounted for by phase considerations. This highlighted the need of a more detailed kinetic approach of the problem and, in particular, of the role growth mechanisms of basal faces could play in this crystallographic phenomenon.

An atomic-resolution microscope study of Al contracts on GaAs

1986 ◽  
Vol 44 ◽  
pp. 726-727
Author(s):  
Z. Liliental-Weber ◽  
C. Nelson ◽  
R. Ludeke ◽  
R. Gronsky ◽  
J. Washburn
Keyword(s):  
High Speed ◽  
Schottky Contacts ◽  
Detailed Knowledge ◽  
The Past ◽  
Semiconductor Interfaces ◽  
Deposited Metal ◽  
Microwave Applications ◽  
Free Interfaces ◽  
Potential Use

The properties of metal/semiconductor interfaces have received considerable attention over the past few years, and the Al/GaAs system is of special interest because of its potential use in high-speed logic integrated optics, and microwave applications. For such materials a detailed knowledge of the geometric and electronic structure of the interface is fundamental to an understanding of the electrical properties of the contact. It is well known that the properties of Schottky contacts are established within a few atomic layers of the deposited metal. Therefore surface contamination can play a significant role. A method for fabricating contamination-free interfaces is absolutely necessary for reproducible properties, and molecularbeam epitaxy (MBE) offers such advantages for in-situ metal deposition under UHV conditions

Biosecurity: tools, behaviours and concepts

2020 ◽  
Vol 4 (5) ◽  
pp. 449-452
Author(s):  
Alan MacLeod ◽  
Nicola Spence
Keyword(s):  
Plant Protection ◽  
Human Life ◽  
Animal Health ◽  
Early Warning Systems ◽  
Policy Makers ◽  
Recent Developments ◽  
Surveillance Programs ◽  
Harmful Organisms ◽  
The One ◽  
Biosecurity Practices

COVID 19 has raised the profile of biosecurity. However, biosecurity is not only about protecting human life. This issue brings together mini-reviews examining recent developments and thinking around some of the tools, behaviours and concepts around biosecurity. They illustrate the multi-disciplinary nature of the subject, demonstrating the interface between research and policy. Biosecurity practices aim to prevent the spread of harmful organisms; recognising that 2020 is the International Year of Plant Health, several focus on plant biosecurity although invasive species and animal health concerns are also captured. The reviews show progress in developing early warning systems and that plant protection organisations are increasingly using tools that compare multiple pest threats to prioritise responses. The bespoke modelling of threats can inform risk management responses and synergies between meteorology and biosecurity provide opportunities for increased collaboration. There is scope to develop more generic models, increasing their accessibility to policy makers. Recent research can improve pest surveillance programs accounting for real-world constraints. Social science examining individual farmer behaviours has informed biosecurity policy; taking a broader socio-cultural approach to better understand farming networks has the potential to change behaviours in a new way. When encouraging public recreationists to adopt positive biosecurity behaviours communications must align with their values. Bringing together the human, animal, plant and environmental health sectors to address biosecurity risks in a common and systematic manner within the One Biosecurity concept can be achieved through multi-disciplinary working involving the life, physical and social sciences with the support of legislative bodies and the public.

The potential use of short chain peptides in parenteral nutrition

1985 ◽  
Vol 4 ◽  
pp. 116-123 ◽  
Author(s):  
P STEHLE ◽  
S ALBERS ◽  
I AMBERGER ◽  
P PFAENDER ◽  
P FURST
Keyword(s):  
Parenteral Nutrition ◽  
Short Chain ◽  
Potential Use

Institute For Plant Protection

1920 ◽  
Vol 2 (2supp) ◽  
pp. 174-175
Author(s):  
Vernon Kellogg ◽  
R. M. Yerkes ◽  
H. E. Howe
Keyword(s):  
Plant Protection
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