Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Jackson Wachira"'
Publikováno v:
Land, Vol 13, Iss 6, p 740 (2024)
In recent years, many community-based conservancies (CBCs) led by non-governmental organizations (NGOs) have been established on land inhabited by pastoralists in Northern Kenya. Despite a growing body of research, little attention has been paid to t
Externí odkaz:
https://doaj.org/article/9e4d315397ce4333a832ff9c6075e05d
Autor:
Eric Nthiga Njiru, Jackson Wachira Muthengia, Onesmus Mulwa Munyao, Daniel Karanja Mutitu, David Munyao Musyoki
Publikováno v:
Advances in Civil Engineering, Vol 2023 (2023)
Grinding aids (GAs) are polar chemicals introduced in cement mills in either liquid or powder form to improve on mill grindability efficiency. Studies have shown that some GAs not only help in grinding efficiency but also play vital roles in improvin
Externí odkaz:
https://doaj.org/article/69594ae1b23a4d5e951825575ba1abf8
Autor:
David Munyao Musyoki, Jackson Wachira Muthengia, Joanne Ogunah, Daniel Karanja Mutitu, John Kinuthia, Romano Mwirichia, Joseph Karanja Thiong’o, Munyao Onesmus Mulwa, Murithi Genson
Publikováno v:
Journal of Chemistry, Vol 2022 (2022)
The world’s growing population and industrialization have led to increased construction activities. This has increased the amount of waste aggregates which can be recycled in construction and cut the cost of infrastructure development. This study,
Externí odkaz:
https://doaj.org/article/16cf62fa27694f028fed1db911b3e232
Autor:
Kelvin Mwangi Wanjiku, Jackson Wachira Muthengia, Joanne Ogunah, Daniel Karanja Mutitu, John Kinuthia, Romano Mwirichia, Joseph Karanja Thiong’o, Munyao Onesmus Mulwa, Muriithi Genson, Peter Waithaka, David Musyoki Munyao
Publikováno v:
Advances in Materials Science and Engineering, Vol 2022 (2022)
This paper reports study findings on the use of Lysinibacillus sphaericus (at 1.0 × 107 cells/ml concentration) to enhance and improve the physicomechanical and chemical properties of blended Ordinary Portland Cement (OPC). Blending was done separat
Externí odkaz:
https://doaj.org/article/70c19bb502f64bdb88cf13384a84ca3b
Publikováno v:
Heliyon, Vol 6, Iss 9, Pp e05025- (2020)
Efforts to reduce pressure on use of wood in particleboard formulation have included the use of non-wood materials such as crop residues. Physical and mechanical properties are determined by the number of the hydroxyl (-OH) groups. Hydroxyl (-OH) gro
Externí odkaz:
https://doaj.org/article/0daac6d86a564a2a9e23ec3d7cbf00c4
Autor:
Stephen Warui Kariuki, Jackson Wachira Muthengia, Millien Kawira Erastus, Genson Murithi Leonard, Joseph Mwiti Marangu
Publikováno v:
Heliyon, Vol 6, Iss 7, Pp e04574- (2020)
Conventional binders in the particleboards formulation involve use of formaldehyde resins. Epidemiologic studies show that formaldehyde is carcinogenic. Efforts to reduce formaldehyde emissions by use of scavengers has not been proven to reduce the e
Externí odkaz:
https://doaj.org/article/97d1192e7009481cb49620207f9bd975
Publikováno v:
Journal of Sustainable Mining, Vol 17, Iss 4, Pp 202-208 (2018)
In many countries large deposits of copper with no locally established copper based industries occur because known methods for extraction are prohibitively expensive and unaffordable. This study reports on an affordable and sustainable method for the
Externí odkaz:
https://doaj.org/article/bd186ce3f5704d779679af4363168778
Autor:
Onesmus Mulwa Munyao, Joseph Karanja Thiong'o, Jackson Wachira Muthengia, Daniel Karanja Mutitu, Romano Mwirichia, Genson Muriithi, Joseph Mwiti Marangu
Publikováno v:
Heliyon, Vol 6, Iss 1, Pp e03232- (2020)
Most of concrete structural failures are attributed to poor workmanship and poor engineering designs. Some microorganisms present in sewer systems can degrade the concrete and/or mortar. Concrete failures due to microbial attack has not attracted muc
Externí odkaz:
https://doaj.org/article/611818f9a7a6400ebd14f880a6767d2d
Autor:
Peterson Mutembei Kugeria, Isaac Waweru Mwangi, Jackson Wachira Muthengia, Peter Waithaka Njoroge
Publikováno v:
Heliyon, Vol 5, Iss 11, Pp e02921- (2019)
Copper is found in several minerals in the earth's crust with varying the elemental and mineralogical composition. Several techniques of extraction have been investigated all in the effort of obtaining a cheaper and viable method. This paper reports
Externí odkaz:
https://doaj.org/article/8f2386aa9bf44ebdba1a50c672e0ce29
Publikováno v:
Journal of Chemistry, Vol 2019 (2019)
Formaldehyde-based resins are conventionally used as a binder in formulation of particleboard. Epidemiologic studies have shown that formaldehyde is carcinogenic. Efforts to reduce the health hazard effects of the fomaldehyde-based resin in the parti
Externí odkaz:
https://doaj.org/article/3ff129b18cff46cb877b2322b566d587