PSBO SAMPLES A COMPLEX CONFORMATIONAL LANDSCAPE WHICH IS REGULATED BY PHOTOSYSTEM II

The maintenance of aerobic heterotrophic life relies on the photosynthetic oxygen production in the PSII reaction center. This reaction is intrinsically important in biological chemistry. Moreover, the efficiency of transferring solar energy to chemical energy makes PSII an excellent candidate for modeling the design and development of sustainable and biomimetic forms of artificial energy. PSII is a multisubunit transmembrane complex. It consists of several membrane-spanning helices and three main extrinsic subunits. PsbO is proposed to be an IDP when isolated free in solution. Its secondary structure showed significant change after bound to PSII, which is referred as templating effect. MS, CD and UVRR are used in my study to locate the residues that respond to the regulation of PSII. The current work provides new structural/conformational information concerning an indispensable part of the photosynthetic oxygen production reaction, PsbO, an extrinsic subunit of PSII.M.S

Research on the performance and application of low traffic hardened lime-fly ash pavement materials in rural areas

By means of curing agent hardening technology applied for lime-fly ash road surface, the performance of unconfined compressive strength, water stability and freezing stability of hardened fly ash mixture has been tested, and the feasibility of the technology has been verified. At the same time, combined with the indoor test results, the test road has been paved which achieved good results, and the construction technology is simple, economical and reasonable, so it has a good value of popularization and application

Continuous Spatial Query Processing:A Survey of Safe Region Based Techniques

In the past decade, positioning system-enabled devices such as smartphones have become most prevalent. This functionality brings the increasing popularity of location-based services in business as well as daily applications such as navigation, targeted advertising, and location-based social networking. Continuous spatial queries serve as a building block for location-based services. As an example, an Uber driver may want to be kept aware of the nearest customers or service stations. Continuous spatial queries require updates to the query result as the query or data objects are moving. This poses challenges to the query efficiency, which is crucial to the user experience of a service. A large number of approaches address this efficiency issue using the concept of safe region . A safe region is a region within which arbitrary movement of an object leaves the query result unchanged. Such a region helps reduce the frequency of query result update and hence improves query efficiency. As a result, safe region-based approaches have been popular for processing various types of continuous spatial queries. Safe regions have interesting theoretical properties and are worth in-depth analysis. We provide a comparative study of safe region-based approaches. We describe how safe regions are computed for different types of continuous spatial queries, showing how they improve query efficiency. We compare the different safe region-based approaches and discuss possible further improvements