Abstract:
:There is concern in many developed countries that school students are turning away from science. However, students may be choosing not to study science and dismissing the possibility of a scientific career because, in the junior secondary years, they gain a false view of science and the work of scientists. There is a disparity between science as it is portrayed at school and science as it is practiced. This paper describes a study to explore whether engaging in science through astrobiology outreach activities may improve students' understanding of the nature and processes of science, and how this may influence their interest in a career in science. The results suggest that the students attending these Mars research-related outreach activities are more interested in science than the average student but are lacking in understanding of aspects of the nature of science. A significant difference was detected between pre- and posttest understandings of some concepts of the nature of science.
journal_name
Astrobiologyjournal_title
Astrobiologyauthors
Fergusson J,Oliver C,Walter MRdoi
10.1089/ast.2012.0873subject
Has Abstractpub_date
2012-12-01 00:00:00pages
1143-53issue
12eissn
1531-1074issn
1557-8070journal_volume
12pub_type
杂志文章,评审相关文献
ASTROBIOLOGY文献大全abstract::We propose a terahertz (far-infrared) circular dichroism-based life-detection technology that may provide a universal and unequivocal spectroscopic signature of living systems regardless of their genesis. We argue that, irrespective of the specifics of their chemistry, all life forms will employ well-structured, chira...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/153110703322610609
更新日期:2003-10-01 00:00:00
abstract::Tetrapyrroles are essential to basic biochemical processes such as electron transfer and photosynthesis. However, it is not known whether these evolutionary old molecules have a prebiotic origin. We have serendipitously obtained pyrroles, which are the corresponding monomers, in laboratory experiments that simulated t...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2012.0934
更新日期:2013-06-01 00:00:00
abstract::Evaporation of silica-rich geothermal waters is one of the main abiotic drivers of the formation of silica sinters around hot springs. An important role in sinter structural development is also played by the indigenous microbial communities, which are fossilized and eventually encased in the silica matrix. The combina...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2012.0887
更新日期:2013-02-01 00:00:00
abstract:UNLABELLED:Fluid inclusions trapped in ancient halite can contain a community of halophilic prokaryotes and eukaryotes that inhabited the surface brines from which the halite formed. Long-term survival of bacteria and archaea and preservation of DNA have been reported from halite, but little is known about the distribu...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2015.1397
更新日期:2016-06-01 00:00:00
abstract::Recent measurements of methane (CH4) by the Mars Science Laboratory (MSL) now confront us with robust data that demand interpretation. Thus far, the MSL data have revealed a baseline level of CH4 (∼0.4 parts per billion by volume [ppbv]), with seasonal variations, as well as greatly enhanced spikes of CH4 with peak ab...
journal_title:Astrobiology
pub_type: 杂志文章,评审
doi:10.1089/ast.2018.1917
更新日期:2018-10-01 00:00:00
abstract::A continuing challenge for scientists is to keep K-12 teachers informed about new scientific developments. Over the past few years, this challenge has increased as new research findings have come from the field of astrobiology. In addition to trying to keep abreast of these new discoveries, K-12 teachers must also fac...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/15311070260192282
更新日期:2002-07-01 00:00:00
abstract::A long-term goal of exoplanet studies is the identification and detection of biosignature gases. Beyond the most discussed biosignature gas O2, only a handful of gases have been considered in detail. In this study, we evaluate phosphine (PH3). On Earth, PH3 is associated with anaerobic ecosystems, and as such, it is a...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2018.1954
更新日期:2020-02-01 00:00:00
abstract:UNLABELLED:We developed a prototype instrument called the Standoff Biofinder, which can quickly locate biological material in a 500 cm(2) area from a 2 m standoff distance with a detection time of 0.1 s. All biogenic materials give strong fluorescence signals when excited with UV and visible lasers. In addition, the lu...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2015.1400
更新日期:2016-09-01 00:00:00
abstract::Initially, Raman spectroscopy was a specialized technique used by vibrational spectroscopists; however, due to rapid advancements in instrumentation and imaging techniques over the last few decades, Raman spectrometers are widely available at many institutions, allowing Raman spectroscopy to become a widespread analyt...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2013.1034
更新日期:2013-10-01 00:00:00
abstract::This study presents an assay for the detection and quantification of soil metal superoxides and peroxides in regolith and soil. The O2 release (OR) assay is based on the enzymatic conversion of the hydrolysis products of metal oxides to O2 and their quantification by an O2 electrode based on the stoichiometry of the i...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2015.1345
更新日期:2016-02-01 00:00:00
abstract::Antarctic subglacial lakes are often considered suitable analogues to extraterrestrial subglacial aqueous environments. Recently, an environmentally friendly RECoverable Autonomous Sonde (RECAS) was designed at the Polar Research Center of Jilin University (JLU) to sample the water of subglacial lakes without contamin...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2019.2103
更新日期:2020-01-01 00:00:00
abstract::The objective of the 2009 Mars Science Laboratory (MSL), which is planned to follow the Mars Exploration Rovers and the Phoenix lander to the surface of Mars, is to explore and assess quantitatively a site on Mars as a potential habitat for present or past life. Specific goals include an assessment of the past or pres...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2007.0160
更新日期:2008-06-01 00:00:00
abstract::Over the next two decades, NASA and ESA are planning a series of space-based observatories to find Earth-like planets and determine whether life exists on these planets. Previous studies have assessed the likelihood of detecting life through signs of biogenic gases in the atmosphere or a red edge. Biogenic gases and t...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2010.0495
更新日期:2010-11-01 00:00:00
abstract::Raman spectroscopy can provide chemical information about organic and inorganic substances quickly and nondestructively with little to no sample preparation, thus making it an ideal instrument for Mars rover missions. The ESA ExoMars planetary mission scheduled for launch in 2018 will contain a miniaturized Raman spec...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2015.1334
更新日期:2015-09-01 00:00:00
abstract::The chemical basis of life involves more than simply the presence of biological molecules; biochemical systems embody a complex network of reactions with characteristic topological features. At the same time, chemical complexity is also present in nonbiological contexts, inviting us to clarify the relationship between...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2011.0674
更新日期:2012-01-01 00:00:00
abstract::We show that terrestrial planets in the habitable zones of M dwarfs older than ∼1 Gyr could have been in runaway greenhouses for several hundred million years following their formation due to the star's extended pre-main sequence phase, provided they form with abundant surface water. Such prolonged runaway greenhouses...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2014.1231
更新日期:2015-02-01 00:00:00
abstract::Lunar dust toxicity has to be evaluated in view of future manned missions to the Moon. Previous studies on lunar specimens and simulated dusts have revealed an oxidant activity assigned to HO· release. However, the mechanisms behind the reactivity of lunar dust are still quite unclear at the molecular level. In the pr...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2014.1216
更新日期:2015-05-01 00:00:00
abstract::Stromatolite structures in Early Archean carbonate deposits form an important clue for the existence of life in the earliest part of Earth's history. Since Mars is thought to have had similar environmental conditions early in its history, the question arises as to whether such stromatolite structures also evolved ther...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2009.0388
更新日期:2010-04-01 00:00:00
abstract::The Dry Valleys of Antarctica are one of the coldest and driest environments on Earth with paleosols in selected areas that date to the emplacement of tills by warm-based ice during the Early Miocene. Cited as an analogue to the martian surface, the ability of the Antarctic environment to support microbial life-forms ...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2010.0583
更新日期:2011-05-01 00:00:00
abstract::Like all low- and moderate-mass stars, the Sun will burn as a red giant during its later evolution, generating of solar luminosities for some tens of millions of years. During this post-main sequence phase, the habitable (i.e., liquid water) thermal zone of our Solar System will lie in the region where Triton, Pluto-C...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/153110703769016406
更新日期:2003-07-01 00:00:00
abstract::Dryness is one of the main environmental challenges to microbial survival. Understanding the threshold of microbial tolerance to extreme dryness is relevant to better constrain the environmental limits of life on Earth and critically evaluate long-term habitability models of Mars. Biomolecular proxies for microbial ad...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2017.1705
更新日期:2018-07-01 00:00:00
abstract::Abstract Technologies that enable rapid and efficient extraction of biomarker compounds from various solid matrices are a critical requirement for the successful implementation of in situ chemical analysis of the martian regolith. Here, we describe a portable subcritical water extractor that mimics multiple organic so...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2007.0154
更新日期:2008-06-01 00:00:00
abstract::The γ-radiolysis of fullerenes (C60 and C70) was performed to investigate the role of fullerenes as a carbon source in building organic molecules in astrophysical ice analog media. Mass spectrometric analyses and the sequential collision-induced dissociation processes enabled us to determine the plausible chemical str...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2018.1905
更新日期:2019-07-01 00:00:00
abstract::Polymeric compounds similar to oligonucleotides are relevant to the origin of life and particularly to the concept of an RNA world. Although short oligomers of RNA can be synthesized nonenzymatically under laboratory conditions by second-order reactions in concentrated solutions, there is no consensus on how these pol...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/15311070152757465
更新日期:2001-10-01 00:00:00
abstract::Knowledge and understanding of the martian environment has advanced greatly over the past two decades, beginning with NASA's return to the surface of Mars with the Pathfinder mission and its rover Sojourner in 1997 and continuing today with data being returned by the Curiosity rover. Reduced carbon, however, is yet to...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2014.1220
更新日期:2015-06-01 00:00:00
abstract::In June 2003, the geochemical composition of geothermal fluids was determined at 9 sites in the Vulcano hydrothermal system, including sediment seeps, geothermal wells, and submarine vents. Compositional data were combined with standard state reaction properties to determine the overall Gibbs free energy (DeltaG(r) ) ...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2007.0128
更新日期:2007-12-01 00:00:00
abstract::Equilibrium adsorption isotherm data for the purine base adenine has been obtained on several prebiotically relevant minerals by frontal analysis using water as a mobile phase. Adenine is far displaced toward adsorption on pyrite (FeS2), quartz (SiO2), and pyrrhotite (FeS), but somewhat less for magnetite (Fe3O4) and ...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/153110701753593874
更新日期:2001-01-01 00:00:00
abstract::Recent discoveries about Europa--the probable existence of a sizeable ocean below its ice crust; the detection of hydrated sodium carbonates, among other salts; and the calculation of a net loss of sodium from the subsurface--suggest the existence of an alkaline ocean. Alkaline oceans (nicknamed "soda oceans" in analo...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/153110702753621394
更新日期:2002-04-01 00:00:00
abstract::We describe a continuous high-pressure flow reactor designed to simulate the unforced convective interaction of hydrothermal solutions and ocean waters with submarine crust on early Earth-conditions appropriate to those that may have led to the onset of life. The experimental operating conditions are appropriate for i...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2009.0456
更新日期:2010-10-01 00:00:00
abstract::Two major parameters influencing the survival of Bacillus subtilis spores in space and on bodies within the Solar System are UV radiation and vacuum, both of which induce inactivating damage to DNA. To date, however, spore survival and DNA photochemistry have been explored only at the extremes of Earth-normal atmosphe...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/153110702762470518
更新日期:2002-01-01 00:00:00