The Syabru-Bensi hydrothermal system in central Nepal: 1. Characterization of carbon dioxide and radon fluxes

Scrub typhus is a vector-borne, acute febrile illness caused by Orientia tsutsugamushi. Scrub typhus continues to be an important but neglected tropical disease in Nepal. Information on this pathogen in Nepal is limited to serological surveys with little information available on molecular methods to detect O. tsutsugamushi. Limited information exists on the genetic diversity of this pathogen. A total of 282 blood samples were obtained from patients with suspected scrub typhus from central Nepal and 84 (30%) were positive for O. tsutsugamushi by 16S rRNA qPCR. Positive samples were further subjected to 56 kDa and 47 kDa molecular typing and molecularly compared to other O. tsutsugamushi strains. Phylogenetic analysis revealed that Nepalese O. tsutsugamushi strains largely cluster together and cluster away from other O. tsutsugamushi strains from Asia and elsewhere. One exception was the sample of Nepal_1, with its partial 56 kDa sequence clustering more closely with non-Nepalese O. tsutsugamushi 56 kDa sequences, potentially indicating that homologous recombination may influence the genetic diversity of strains in this region. Knowledge on the circulating strains in Nepal is important to the development of diagnostic tests and vaccines to support public health measures to control scrub typhus in this country.

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Polypropylene Fibre Reinforced Concrete Air Permeability

MRS Proceedings ◽

10.1557/proc-211-71 ◽

1990 ◽

Vol 211 ◽

Cited By ~ 2

Author(s):

Miguel A. Sanjuan ◽

A. Moragues ◽

B. Bacle ◽

C. Andrade

Keyword(s):

Carbon Dioxide ◽

Reinforced Concrete ◽

Steel Corrosion ◽

Air Permeability ◽

Polypropylene Fibre ◽

Fibre Reinforced Concrete ◽

Polypropylene Fibres ◽

Cement Ratio ◽

Reinforcing Steel Corrosion

AbstractThe permeability of concrete to gases is of direct importance to the durability of concrete structures, because of carbon dioxide flowing through the concrete favour lime carbonation and reinforcing steel corrosion.Mortar with and without polypropylene fibres having water/cementitious ratios of 0.30, 0.35 and 0.40 and a cement/sand ratio of 1/1 were studied. Polypropylene dosage varied from 0.1 to 0.3% by volume of cement.The characterization of mortar permeability was made using cylindrical shaped samples (3 cm height and 15 cm diameter). These specimens were 28 days cured and then dried before the test.The addition of fibres results in a decrease of air permeability. Variation of the water/cement ratio is of lesser importance than fiber addition.

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Synthesis and Characterization of a Composite Zeolite-Metglas Carbon Dioxide Sensor

Advanced Functional Materials ◽

10.1002/adfm.200400515 ◽

2005 ◽

Vol 15 (7) ◽

pp. 1165-1170 ◽

Cited By ~ 30

Author(s):

I. G. Giannakopoulos ◽

D. Kouzoudis ◽

C. A. Grimes ◽

V. Nikolakis

Keyword(s):

Carbon Dioxide ◽

Synthesis And Characterization ◽

Carbon Dioxide Sensor

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Characterization of Alkanolamine Blends for Carbon Dioxide Absorption. Corrosion and Regeneration Studies

Sustainability ◽

10.3390/su13074011 ◽

2021 ◽

Vol 13 (7) ◽

pp. 4011

Author(s):

Alfredo Sánchez-Bautista ◽

Ester M. Palmero ◽

Alberto J. Moya ◽

Diego Gómez-Díaz ◽

M. Dolores La Rubia

Keyword(s):

Carbon Dioxide ◽

Surface Tension ◽

Energy Consumption ◽

Absorption Rate ◽

Carbon Dioxide Capture ◽

Regeneration Capacity ◽

Carbon Dioxide Absorption ◽

Research Programs ◽

A Priority

There are a lot of research programs focusing on the development of new solvents for carbon dioxide capture. The most important priority should be reducing the energy consumption needed at the regeneration step, but minimizing solvent degradation and its corrosivity is also considered as a priority. In this research, the aqueous blends of 2-amino-2-methyl-1-propanol (AMP: 1 kmol·m−3) and 1-amino-2-propanol (MIPA: 0.1–0.5 kmol·m−3) are characterized in terms of density, viscosity, and surface tension. The carbon dioxide absorption rate and capacity, the regeneration capacity, and the corrosivity of these solvents are also evaluated.

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