1,059 research outputs found
Formulation development and delivery of biopesticides
Non-Peer ReviewedBiopesticide formulation development is integral for end product development and risk reduction associated with commercialization and acceptance by the end user.
Development of robust formulations for biopesticides is a key step towards advancing
this technology into integrated pest management systems. A granular formulation
protocol using extrusion-spheronization-fluidized bed drying for biopesticidal bacteria
and fungal hypha and spores is described. Establishing low granule water activity (aw,
0.2-0.3) is a key factor in extending the shelf-life of the product. Starch type and amount provided controlled release attributes to the biopesticide granules. Microencapsulation of bioherbicide, Colletotrichum truncatum 00-003B1 (Ct), conidia and bioinsecticide nucleopolyhedrovirus (NPV), by complex coacervation is described for foliar application of biocontrol agents
Gravimagnetic effect of the barycentric motion of the Sun and determination of the post-Newtonian parameter gamma in the Cassini experiment
The most precise test of the post-Newtonian gamma parameter in the solar
system has been achieved in measurement of the frequency shift of radio waves
to and from the Cassini spacecraft as they passed near the Sun. The test relies
upon the JPL model of radiowave propagation that includes, but does not
explicitly parametrize, the impact of the non-stationary component of the
gravitational field of the Sun, generated by its barycentric orbital motion, on
the Shapiro delay. This non-stationary gravitational field of the Sun is
associated with the Lorentz transformation of the metric tensor and the affine
connection from the heliocentric to the barycentric frame of the solar system
and can be treated as gravimagnetic field.
The gravimagnetic field perturbs the propagation of a radio wave and
contributes to its frequency shift at the level up to 4 10^{-13} that may
affect the precise measurement of the parameter gamma in the Cassini experiment
to about one part in 10,000. Our analysis suggests that the translational
gravimagnetic field of the Sun can be extracted from the Cassini data, and its
effect is separable from the space curvature characterized by the parameter
gamma.Comment: 12 pages, 1 figure, accepted to Physical Letters
Supersymmetric Euler-Heisenberg effective action: Two-loop results
The two-loop Euler-Heisenberg-type effective action for N = 1 supersymmetric
QED is computed within the background field approach. The background vector
multiplet is chosen to obey the constraints D_\a W_\b = D_{(\a} W_{\b)} =
const, but is otherwise completely arbitrary. Technically, this calculation
proves to be much more laborious as compared with that carried out in
hep-th/0308136 for N = 2 supersymmetric QED, due to a lesser amount of
supersymmetry. Similarly to Ritus' analysis for spinor and scalar QED, the
two-loop renormalisation is carried out using proper-time cut-off
regularisation. A closed-form expression is obtained for the holomorphic sector
of the two-loop effective action, which is singled out by imposing a relaxed
super self-duality condition.Comment: 27 pages, 2 eps figures, LaTeX; V2: typos corrected, comments and
reference adde
Slepton Flavor Nonuniversality, the Muon EDM and its Proposed sensitive Search at Brookhaven
We analyze the electric dipole moment of the electron (), of the neutron
() and of the muon () using the cancellation mechanism in the
presence of nonuniversalities of the soft breaking parameters. It is shown that
the nonuniversalities in the slepton sector produce a strong violation of the
scaling relation in the cancellation region. An
analysis of and under the constraints of the current
experimental limits on and and under the constraints of the recent
Brookhaven result on shows that in the non-scaling region
can be as large as ()ecm and thus within reach of the
recently proposed Brookhaven experiment for a sensitive search for at
the level of ecm.Comment: 24 pages, Latex, including 5 figures with additional reference
Recommended from our members
Applications of Strand-Specific in situ Hybridization
This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). Fluorescence in situ hybridization (FISH) is used to determine the location of specific DNA sequences on chromosomes. It is an effective tool in genomic mapping and is finding increasing use in medical diagnosis. A ''strand-specific'' version of FISH has been developed in the Life Sciences Division of LANL. The new procedure, named CO-FISH, reveals not only location but also the 5'-to-3'direction of a target sequence, such as the sense strand of a gene. This project was designed to investigate applications of the new technique. Strand-specific FISH was found to be useful and informative for genomic mapping of repetitive DNA sequences. The method provide a valuable new tool for investigating the mechanisms of aneuploidy inducing agents and the cytogenetic phenomena called lateral asymmetry. Finally, using strand-specific FISH, the authors were able to detect certain types of chromosome aberrations (isochromosomes, inversions and Robertsonian translocations) that can be difficult to observe with standard techniques
An Assessment of the Use of Chimpanzees in Hepatitis C Research Past, Present and Future: 1. Validity of the Chimpanzee Model
The USA is the only significant user of chimpanzees in biomedical research in the world, since many countries have banned or limited the practice due to substantial ethical, economic and scientific concerns. Advocates of chimpanzee use cite hepatitis C research as a major reason for its necessity and continuation, in spite of supporting evidence that is scant and often anecdotal. This paper examines the scientific and ethical issues surrounding chimpanzee hepatitis C research, and concludes that claims of the necessity of chimpanzees in historical and future hepatitis C research are exaggerated and unjustifiable, respectively. The chimpanzee model has several major scientific, ethical, economic and practical caveats. It has made a relatively negligible contribution to knowledge of, and tangible progress against, the hepatitis C virus compared to non-chimpanzee research, and must be considered scientifically redundant, given the array of alternative methods of inquiry now available. The continuation of chimpanzee use in hepatitis C research adversely affects scientific progress, as well as chimpanzees and humans in need of treatment. Unfounded claims of its necessity should not discourage changes in public policy regarding the use of chimpanzees in US laboratories
NATO Survey of Mental Health Training in Army Recruits
To-date, there has been no international review of mental health resilience training during Basic
Training nor an assessment of what service members perceive as useful from their perspective. In response to this
knowledge gap, the North Atlantic Treaty Organization (NATO) Human Factors & Medicine Research & Technology
Task Group “Mental Health Training” initiated a survey and interview with seven to twenty recruits from nine nations to
inform the development of such training (N = 121). All nations provided data from soldiers joining the military as
volunteers, whereas two nations also provided data from conscripts. Results from the volunteer data showed relatively
consistent ranking in terms of perceived demands, coping strategies, and preferences for resilience skill training across
the nations. Analysis of data from conscripts identified a select number of differences compared to volunteers. Subjects
also provided examples of coping with stress during Basic Training that can be used in future training; themes are
presented here. Results are designed to show the kinds of demands facing new recruits and coping methods used to
overcome these demands to develop relevant resilience training for NATO nations
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