Results 21 to 30 of about 1,023,609 (287)

Visualizing RNA polymers produced by hot wet-dry cycling [PDF]

Scientific Reports, 2022
Abstract It is possible that the transition from abiotic systems to life relied on RNA polymers that served as ribozyme-like catalysts and for storing genetic information. The source of such polymers is uncertain, but previous investigations reported that wet–dry cycles simulating prebiotic hot springs provide sufficient energy to drive ...
Hassenkam, Tue, Deamer, David
openaire   +4 more sources

Sustained wet–dry cycling on early Mars

Nature, 2023
The presence of perennially wet surface environments on early Mars is well documented1,2, but little is known about short-term episodicity in the early hydroclimate3. Post-depositional processes driven by such short-term fluctuations may produce distinct structures, yet these are rarely preserved in the sedimentary record4.
Rapin, W., Dromart, G., Clark, B., Schieber, J., Kite, E., Kah, L., Thompson, L., Gasnault, O., Lasue, J., Meslin, P.-Y., Gasda, P., Lanza, N.   +11 more
openaire   +4 more sources

Volume Changes and Mechanical Properties of Expansive Mudstone below Canals under Wet‐Dry/Wet‐Dry‐Freeze‐Thaw Cycles [PDF]

Advances in Civil Engineering, 2021
The complex environment in northern China is the main reason for degradation of expansive mudstone below the canals, which resulted in instability and damage of canal slopes. In this study, a serial of laboratory tests was conducted to explore the volume changes and mechanical behaviors of expansive mudstone below the canals in Xinjiang.
Rui Zhu, Ying-hao Huang, Zhu Song, Feng Zhou   +3 more
openaire   +2 more sources

Prebiotic condensation through wet–dry cycling regulated by deliquescence [PDF]

Nature Communications, 2019
AbstractWet–dry cycling is widely regarded as a means of driving condensation reactions under prebiotic conditions to generate mixtures of prospective biopolymers. A criticism of this model is its reliance on unpredictable rehydration events, like rainstorms. Here, we report the ability of deliquescent minerals to mediate the oligomerization of glycine
Thomas D. Campbell, Rio Febrian, Jack T. McCarthy, Holly E. Kleinschmidt, Jay G. Forsythe, Paul J. Bracher   +5 more
openaire   +3 more sources

Silica Precipitation in a Wet–Dry Cycling Hot Spring Simulation Chamber [PDF]

Life, 2020
Terrestrial hot springs have emerged as strong contenders for sites that could have facilitated the origin of life. Cycling between wet and dry conditions is a key feature of these systems, which can produce both structural and chemical complexity within protocellular material.
Andrew Gangidine, Jeff R. Havig, Jeffrey S. Hannon, Andrew D. Czaja   +3 more
openaire   +3 more sources

The Recovery of Soils after Compaction: A laboratory investigation into the effect of wet/dry cycles on bulk density and soil hydraulic functions [PDF]

, 2009
Van den Akker et al. (2003) stated that “European subsoils are more threatened than ever in history” in an editorial referring to the results of the European Union concerted action “Experiences with the impact of subsoil compaction on soil crop growth ...
O'Keefe, Sorche
core   +7 more sources

Effect of Wet-Dry Cycles on the Mechanical Performances and Microstructure of Pisha Sandstone

Molecules, 2023
The effects of the wet–dry cycles on the chemical compositions, microstructure, and mechanical properties of Pisha sandstone were experimentally investigated in the current study. A series of uniaxial compression tests were conducted to validate the deterioration of the mechanical property of specimens after wet–dry cycles.
Yanbing Zhao, Caiqian Yang, Feng Qu, Zhiren Wu, Kejie Ding, Zhishui Liang   +5 more
openaire   +3 more sources

Deterioration Characteristic and Constitutive Model of Red-Bed Argillaceous Siltstone Subjected to Drying-Wetting Cycles

Lithosphere, 2022
Red-bed argillaceous siltstone is one of main types of rocks composing unstable slopes on both banks of water diversion project from the Yangtze to Huaihe River and is prone to deterioration after subjected to drying-wetting cycle conditions during water
Fusheng Zha, Kai Huang, Bo Kang, Xianguo Sun, Jingwen Su, Yunfeng Li, Zhitang Lu   +6 more
doaj   +1 more source

Alternate wetting and drying irrigation for rice in Bangladesh: Is it sustainable and has plant breeding something to offer? [PDF]

, 2013
The crop management practice of alternate wetting and drying (AWD) is being promoted by IRRI and the national research and extension program in Bangladesh and other parts of the world as a water-saving irrigation practice that reduces the environmental ...
Price, Adam H., Ismail, Abdelbagi M., Meharg (nee Reiff), Caroline, Ismail, Abdelbagi M, Dasgupta, Tapash, Islam, M. Rafiqul, Dodd, Ian C., Salt, David E., Norton, Gareth J., Davies, William J., Salt, David E, Price, Adam H, Davies, William J, Sarna, Ramen N., Zhang, Hao, Norton, Gareth J, Islam, M Rafiqul, Meharg, Andrew A.; id_orcid, Dodd, Ian C, Sarma, Ramen N, Meharg, Caroline, Ebenhöh, Oliver, Meharg, Andrew A, McNally, Kenneth L., McNally, Kenneth L, Ebenhoeh, Oliver   +25 more
core   +1 more source

Experimental study on physical and mechanical properties of sandstone after drying-wetting cycles of brine

Yantu gongcheng xuebao, 2023
The factors such as rainfall evaporation and groundwater fluctuation in Sichuan Province of China seriously affect the stability of slope engineering in the area.
YANG Shengqi 1, 2, JING Xiaojiao 2
doaj   +1 more source