http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Cyclopentanoid Norsesquiterpenes from Gyrinid Beetles
Wheeler, J. W.,Oh, S. K.,Benfield, E. F.,Neff, S. E. 경희대학교 부설 식량자원개발연구소 1988 硏究論文集 Vol.9 No.-
Although beetle secretions contain relatively simple compounds,^1 steroids and other more complex molecules have been identified recengly.^2 The "whirl-agig" beetle(Dineutes discolor aube, Coleoptera; Gyrinidae)secretes a complex mixture of C_14 polycarbonyl compounds from its pygidial glands which have a defensive function toward fish.^3
A Review of Dose Rate Meters as First Responders to Ionising Radiation
Akber, Aqeel Ahmad,Wiggins, Matthew Benfield The Korean Association for Radiation Protection 2019 방사선방어학회지 Vol.44 No.3
Background: Dose rate meters are the most widely used, and perhaps one of the most important tools for the measurement of ionising radiation. They are often the first, or only, device available to a user for an instant check of radiation dose at a certain location. Throughout the world, radiation safety practices rely strongly on the output of these dose rate meters. But how well do we know the quality of their output? Materials and Methods: This review is based on the measurements 1,158 commercially available dose rate meters of 116 different makes and models. Expected versus the displayed dose patterns and consistency was checked at various dose rates between $5{\mu}Gy{\cdot}h^{-1}$ and $2mGy{\cdot}h^{-1}$. Samples of these meters were then selected for further investigation and were exposed to radiation sources covering photon energies from 50 keV to 1.5 MeV. The effect of detector orientation on its reading was also investigated. Rather than focusing on the angular response distribution that is often reported by the manufacturer of the device, this study focussed on the design ergonomics i.e. the angles that the operator will realistically use to measure a dose rate. Results and Discussion: This review shows the scope and boundaries of the ionising radiation dose rate estimations that are made using commonly available meters. Observations showed both inter and intra make and model variations, occasional cases of instrument failure, instrument walk away, and erroneous response. Conclusion: The results indicate the significance of selecting and maintaining suitable monitors for specific applications in radiation safety.
Defensive Secretions of Cychrine Beetles : Coleoptera: Carabidae
WHEELER, J. W.,CHUNG, R. H.,OH, S. K.,BENFIELD, E. F.,NEFF, S. E. 경희대학교 부설 식량자원개발연구소 1988 硏究論文集 Vol.9 No.-
Defensive secretions of 4 species of Scaphinotns were found to contain a mixture of methacrylic and tiglic acids. Temporal variation in the percent composition of each acid in the secretion may be controlled by diet. Such variation indicates that caution should be used in characterizing species by the composition of their defensive secretion.