482 research outputs found
New species of Southeast Asian Dwarf Tarantula from Thailand: Phlogiellus Pocock, 1897 (Theraphosidae, Selenocosmiinae)
A new record of the tarantula genus Phlogiellus Pocock, 1897 from Thailand is described. Distributional data, natural history, morphological characters, and illustrations of male and female are provided. The Thai specimens belong to a new species, Phlogiellus longipalpus sp. n. The diagnosis of the new species and related species are discussed
New species of Southeast Asian Dwarf Tarantula from Thailand: Phlogiellus Pocock, 1897 (Theraphosidae, Selenocosmiinae)
A new record of the tarantula genus Phlogiellus Pocock, 1897 from Thailand is described. Distributional data, natural history, morphological characters, and illustrations of male and female are provided. The Thai specimens belong to a new species, Phlogiellus longipalpus sp. n. The diagnosis of the new species and related species are discussed
Projector-Based Embedding Eliminates Density Functional Dependence for QM/MM Calculations of Reactions in Enzymes and Solution
Combined
quantum mechanics/molecular mechanics (QM/MM) methods
are increasingly widely utilized in studies of reactions in enzymes
and other large systems. Here, we apply a range of QM/MM methods to
investigate the Claisen rearrangement of chorismate to prephenate,
in solution, and in the enzyme chorismate mutase. Using projector-based
embedding in a QM/MM framework, we apply treatments up to the CCSDÂ(T)
level. We test a range of density functional QM/MM methods and QM
region sizes. The results show that the calculated reaction energetics
are significantly more sensitive to the choice of density functional
than they are to the size of the QM region in these systems. Projector-based
embedding of a wave function method in DFT reduced the 13 kcal/mol
spread in barrier heights calculated at the DFT/MM level to a spread
of just 0.3 kcal/mol, essentially eliminating dependence on the functional.
Projector-based embedding of correlated ab initio methods provides a practical method for achieving high accuracy
for energy profiles derived from DFT and DFT/MM calculations for reactions
in condensed phases
The Efficacy and Safety of Heterologous Immunization with Pfizer-BioNTech (Pfizer) to Individuals Who Have Completed A Primary Vaccination Schedule with Sinopharm (BBibp-CorV)
The aim of this study was to examine the effectiveness and potential adverse reactions when providing a different Pfizer-BioNTech booster shot to 235 volunteers who had previously received the BBIBP-CorV Sinopharm primary vaccination series. Between February and December 2022, a questionnaire-based cross-sectional study was conducted in Duhok, located within the Kurdistan Region of Iraq. The individuals included in the study were adults aged 18 and above, who had received a Pfizer-BioNTech booster shot following the completion of a two-dose vaccination regimen with Sinopharm (BBIBP-CorV). The findings revealed that among those vaccinated with BBIBP-CorV, there were breakthrough infections at a rate of 4.26%, and no significant correlation was identified between post-vaccination infections and factors such as demographics or medical history. Furthermore, individuals who had a Pfizer booster dose experienced breakthrough infections at a rate of 5.73%, and similarly, no link was discovered between this rate and demographic or medical factors. Additionally, the study uncovered that participants commonly experienced side effects, primarily consisting of mild effects at the injection site. The study implies that both the Sinopharm and Pfizer vaccines demonstrate satisfactory safety profiles. It also suggests that giving a heterologous booster dose to individuals who have finished their primary vaccination with the BBIBP-CorV vaccine offers a significant level of protection against infection
A study of patent thickets
Report analysing whether entry of UK enterprises into patenting in a technology area is affected by patent thickets in the technology area
Prediction of Emerging Technologies Based on Analysis of the U.S. Patent Citation Network
The network of patents connected by citations is an evolving graph, which
provides a representation of the innovation process. A patent citing another
implies that the cited patent reflects a piece of previously existing knowledge
that the citing patent builds upon. A methodology presented here (i) identifies
actual clusters of patents: i.e. technological branches, and (ii) gives
predictions about the temporal changes of the structure of the clusters. A
predictor, called the {citation vector}, is defined for characterizing
technological development to show how a patent cited by other patents belongs
to various industrial fields. The clustering technique adopted is able to
detect the new emerging recombinations, and predicts emerging new technology
clusters. The predictive ability of our new method is illustrated on the
example of USPTO subcategory 11, Agriculture, Food, Textiles. A cluster of
patents is determined based on citation data up to 1991, which shows
significant overlap of the class 442 formed at the beginning of 1997. These new
tools of predictive analytics could support policy decision making processes in
science and technology, and help formulate recommendations for action
Nano Mapper: an Internet knowledge mapping system for nanotechnology development
Nanotechnology research has experienced rapid growth in recent years. Advances in information technology enable efficient investigation of publications, their contents, and relationships for large sets of nanotechnology-related documents in order to assess the status of the field. This paper presents the development of a new knowledge mapping system, called Nano Mapper (http://nanomapper.eller.arizona.edu), which integrates the analysis of nanotechnology patents and research grants into a Web-based platform. The Nano Mapper system currently contains nanotechnology-related patents for 1976–2006 from the United States Patent and Trademark Office (USPTO), European Patent Office (EPO), and Japan Patent Office (JPO), as well as grant documents from the U.S. National Science Foundation (NSF) for the same time period. The system provides complex search functionalities, and makes available a set of analysis and visualization tools (statistics, trend graphs, citation networks, and content maps) that can be applied to different levels of analytical units (countries, institutions, technical fields) and for different time intervals. The paper shows important nanotechnology patenting activities at USPTO for 2005–2006 identified through the Nano Mapper system
Twenty-first century macro-trends in the institutional fabric of science: bibliometric monitoring and analysis
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