Journal of Theoretical and Applied Sciences


Relationship between regional longevity and elements in environmental media in China

Research Article of Journal of Theoretical and Applied Sciences Relationship between regional longevity and elements in environmental media in China Zhang Ying College of Earth Science and Engineering, Hebei University of Engineering. Longevity has always been a desire and expectation since ancient times. Exploring the influencing factors of longevity is the goal of many scholars. Longevity has spatial aggregation. The influence of natural geographical environment on longevity is the focus of research. The content and distribution of elements in environmental media are one of the important factors affecting longevity. At present, there is still a lack of systematic exposition of regional health and longevity, and a lack of overall grasp of the relationship between elements in environmental media and health and longevity. Based on the research of environmental elements and longevity in typical longevity areas, this paper explores the key dominant elements affecting longevity and provides scientific basis for improving the health level of the elderly population. Keywords: Health and longevity; Environmental medium; Element ...

Study on factors affecting rare earth leaching rate in acid leaching process of fly ash

Research Article of Journal of Theoretical and Applied Sciences Study on factors affecting rare earth leaching rate in acid leaching process of fly ash Chuan Ren1, Yanheng Li1*, Jianqi Man1, Wenhui Li1, Lufan Chang1, Xin Zhao1 1School of Earth Science and Engineering, Hebei University of Engineering, Handan 056038, China. There is a large amount of enrichment of rare earth elements in Zhungeer coal and coal ash, making it possible to use fly ash as a source for industrial production of rare earth elements. In order to optimize the leaching process of rare earth elements in fly ash and increase the leaching rate, the circulating fluidized bed fly ash of Zhungeer Power Plant was used as the material, and the single factor test and orthogonal test were used to influence the leaching rate of rare earth elements in the acid leaching process of fly ash The factors were discussed, and the results showed that when fly ash and 3mol/L hydrochloric acid were leached at a ratio of 1:10 for 2h at 130 0C, the element leaching effect was the best, and the leaching rate could reach 97%. Keywords: Fly ash, Hydrochloric acid, Rare earth, Leaching rate ...

Gravity defined precisely with quarks – squaring the circle to achieve fine description of black hole physics, and understanding the formation of key constellations

Review Article of Journal of Theoretical and Applied Sciences Gravity defined precisely with quarks – squaring the circle to achieve fine description of black hole physics, and understanding the formation of key constellations Florent Pirot Independent researcher Gravity is redefined by drawing on the author’s works and inputting quark physics in a way consistent with it ; it allows to better understand black hole dynamics, black hole eruptions and some constellation patterns in the sky (the Scorpio, Ursa Minor and Ursa Major as well as Cassiopea for instance). The concept of gravitational lensing is rapidly differenciated from black hole eruptions. Some final remarks underline a possible threat for missions to the Moon. Keywords: black hole physics, gravity, antigraviton, particle physics, constellations, cosmology ...

Risk assessment of Ordovician limestone water inrush in No.9 coal seam of Yangdong coal mine and its prevention and control measures

Research Article of Journal of Theoretical and Applied Sciences Risk assessment of Ordovician limestone water inrush in No.9 coal seam of Yangdong coal mine and its prevention and control measures Li Yanheng1,2,3*, Tao Zhen1, Xu Jinfeng1, Man Jianqi1, Ren Chuan1, Li Wenhui1, Zhao Xin1 1College of Earth Science and Engineering, Hebei University of Engineering, Handan 056038,China; 2Key Laboratory of Resource Exploration Research of Hebei Province, Hebei Collaborative Innovation Center of Coal Exploition, Hebei University of Engineering, Handan 056038, China; 3Hydrogeological Bureau of China National Administration of coal geology, Handan 056038, China With the increasing of mining depth, intensity, scale and speed, Ordovician limestone water has become the biggest threat to the safety production of the low group seam. Based on the existing geological data, the hydrogeological characteristics of Ordovician limestone water are analyzed; the risk of Ordovician limestone water inrush is evaluated by using the method of “five maps and double coefficients” and considering the importance of effective protective thickness of floor protective layer in the evaluation results. The results show that there are no non straight through relative safety area (Area I) and non straight type relative risk area (Area II), only non straight type water inrush risk area (Area III) and straight through water inrush risk area (Area IV). According to the evaluation results, the floor grouting reinforcement is directly adopted in Area IV, and the Ordovician limestone may need to be modified in the strong water rich area; in Area III, the grouting transformation of the floor is carried out after the area with water inrush is identified first, but the Ordovician limestone is not needed. Other prevention and control measures should be  subsidiary. Keywords: Water inrush from Ordovician limestone; Risk assessment; “five figures and double coefficients” method; Prevention and control measures ...

Manuscript Title: The title should be a brief phrase.

Author Information: List full names and affiliation of all authors, including Emails and phone numbers of corresponding author.

Abstract: The abstract should be less than 500 words. Following abstract, a list of keywords and abbreviations should be added. The keywords should be no more than 10. Abbreviation are only used for non standard and long terms.

Introduction: The introduction should included a clear statement of current problems.

Materials and Methods: This section should be clearly described.

Results and discussion: Authors may put results and discussion into a single section or show them separately.

Acknowledgement: This section includes a brief acknowledgment of people, grant details, funds

References: References should be listed in a numbered citation order at the end of articles. DOIs and links to referenced articles should be added if available. Abstracts and talks for conferences or papers not yet accepted should not be cited.

Tables and figures: Tables should be used at a minimum with a short descriptive title. The preferred file formats for Figures/Graphics are GIF, TIFF, JPEG or PowerPoint.

Online Publication: One of our goals is to minimize the publication time. We will publish an accepted article shortly (we may put the proof of accepted manuscript onlinefirst and then replace it later with the final version).

Open Access: We follow Open Access and the CC BY 4.0. Authors hold the copyright and retain publishing rights without restrictions. We do not charge any submission fees, but authors are required to pay publication fees after their manuscripts are accepted. We may grant discount/waiver to certain authors. For authors who receive our invitations, please send us the invitation code with your submission. 

Withdrawal Policy: When you want to withdraw/retract an article, please send us a written request including reasons by the correspondence email. We will withdraw/retract it from our system after reviewing the request.

Terms of Use/ Privacy Policy/ Disclaimer/Other Policies: By using the site/services, you are agreeing to our Terms of Use/Privacy Policy/Disclaimer/Other Policies. For more details, please click here .

About the journal
Our aim is to provide a platform that encourages publications of the most recent research/reviews for authors of all countries.


About the publisher
eSciPub LLC is a publisher to support Open Access initiative located in Texas, USA. It is a member of the largest community of professional publishers in the United States: the Independent Book Publishers Association. It hosts Open Access journals in Medicine, Business, Economics, Agriculture, Biological Sciences, Chemistry, Education, Physical Sciences, Sociology, Engineering.


Rapid Response Team
Please feel free to contact us if you have any questions. Our customer representative will answer your questions shortly.

Journal of Theoretical and Applied sciences

Loading