Solar activity

The aim of this study was to investigate the photocatalytic activity improving of TiO2, Ag-TiO2 as photocatalysts which immobilized on perlite granules to degrade MB from synthetic wastewater under solar light irradiation. The photocatalytic mechanisms induced by solar light responsive Ag-TiO2/perlite composite was also proposed to demonstrate the photodegradation of MB cationic dye.

7p vikwong 29-09-2024 3 1   Download

Wet periods are evidenced by dark olive green mixed lithology (sandy, clay, and silts) and high values in MS and log(Sr/Ca). On the other hand, dry periods are associated with light olive green clayey mud lithology and high values in log(Ca/K). We relate the wet periods to negative North Atlantic Oscillation (NAO–) and the dry periods to NAO+. Additionally, all wet periods are related with time of low solar activity and dry periods, except Dalton Minimum, are related with periods of high solar activity.

10p tanmocphong 29-01-2022 11 1   Download

In this article, looks at the teaching methods of a grade 12 project-based learning (PBL) physics course in solar energy as a part of a sustainable development (SD) curriculum. It was shown that discussions about solar cooking and natural resources projects put many important ideas into students’ heads indicating an effective improvement of PBL and education for SD in schools.

8p tamynhan8 04-11-2020 17 2   Download

Chemical doping nitrogen in to TiO2 crystal network by methods of sol-gel and impregnation was presented. The obtained nitrogen-doped TiO2 materials were characterized by different techniques such as XRD, SEM, UV-VIS. It was shown that samples have very uniform nano size, anatas structure and low level of band-gap energy (Ebg ~ 2.2 eV, ~ 500 - 600 nm). Their activity and kinetic were also studied and the results proved that in comparison with P25, the obtained nitrogen-doped TiO2 had higher activity and photo-quantum efficiency in organic disintegrated reaction under solar radiation.

6p uocvong01 24-09-2015 52 8   Download

A look on energy, renewable energies, energy storage and synthetic fuels, hybrid architecture, fuel cells, hydrogen as a vector of energy of the future.The Earth resources are quite limited in quantity Many challenges to mankind in 21st century: development, health, water, food, demography, education, energy.In physics, energy (Ancient Greek: ἐνέργεια energeia "activity, operation"[1]) is a quantity that is often understood as the ability a physical system has to produce changes on another physical system.

156p dienquochuy 21-12-2012 80 20   Download

The author wishes to thank AusAID and the Ministry of Agriculture and Rural Development project approval and funding from AusAID. Also like to thank the staff of the Can Tho University, Agriculture University and Institute of Agricultural Sciences Highlands have contributed their time and labor for the project activities. Ministry of Science and Technology (DOST), Ben Tre province thanked their assistance in the farmer survey and selection of sites to evaluate small-scale solar dryer. Smilja Lambert of Mars, Inc..

18p xau_la 10-02-2012 74 7   Download

The authors wish to thank AusAID and the Ministry of Agriculture and Rural Development, Vietnam project approval and funding from AusAID. Also like to thank the staff of the Can Tho University, University of Agriculture and Forestry and Agriculture Highland Academy of Sciences has contributed time and labor to operate the project.

34p xau_la 10-02-2012 72 7   Download

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Solar activity, global surface air temperature anomaly and pacific decadal oscillation recorded in urban tree rings...

14p toshiba5 15-09-2011 44 6   Download