نتایج جستجو برای: laboratory observations
تعداد نتایج: 551248 فیلتر نتایج به سال:
Behavioral assays constitute important research tools when assessing how fish respond to environmental change. However, it is unclear how behavioral modifications recorded in laboratory assays are expressed in natural ecosystems, a limitation that makes it difficult to evaluate the predictive power of laboratory-based measurements. In this study, we hypothesized that exposure to a benzodiazepin...
and laboratory experiments P. M. Bellan, M. Livio, Y. Kato, S. V. Lebedev, T. P. Ray, A. Ferrari, P. Hartigan, A. Frank, J. M. Foster, and P. Nicolaï Caltech, Pasadena, California 91125, USA Space Telescope Science Institute, Baltimore, Maryland 21218, USA University of Tsukuba, Ibaraki 3058577, Japan Blackett Laboratory, Imperial College, London SW7 2BW, United Kingdom Dublin Institute for Adv...
The Mars Science Laboratory (MSL) made a successful landing at Gale crater early August 2012. MSL has an environmental instrument package called the Rover Environmental Monitoring Station (REMS) as a part of its scientific payload. REMS comprises instrumentation for the observation of atmospheric pressure, temperature of the air, ground temperature, wind speed and direction, relative humidity (...
Introduction: In future human exploration of Mars, many challenges face us. Mars is a dusty planet and dust and windblown particulates will present one of the most significant difficulties [1]. The dust and granular regolith will challenge materials, machines, and people. Our experience with dust-covered astronauts on the Moon and with landers and rovers on Mars suggests that significant effort...
Cancer is a multi-step disease involving a series of genetic alterations that result in the loss of control of cell proliferation and differentiation. Such genetic alterations could emerge from the activation of oncogenes and the loss or malfunctioning of tumor suppressor gene activity. Our understanding of cancer has greatly increased through the use of DNA tumor viruses and their transforming...
Submerged acetic fermentation experiments were performed for the purpose of determining the conditions under which this type of fermentation should be conducted under laboratory conditions. The apparatus used consisted of a set of glass tubes provided with air spargers. Acetobacter acetigenum was found to be the most suitable bacterium among six Acetobacter compared under submerged acetic ferme...
Fe-sulfates on Mars: Sulfate is one of the major types of secondary minerals found on Mars by recent missions, which reinforced its importance for Mars science. Sulfates are excellent hosts of water, the sinks of acidity, and maybe the most active species in the past and current surface/near-surface processes on Mars [1]. Although Mgand Ca-sulfates were identified with wide vertical and horizon...
Repeated, self-excited dust acoustic shock waves (DASWs) have been observed in a dc glow discharge dusty plasma using high-speed video imaging. Two major observations are reported: (1) The self-steepening of a nonlinear dust acoustic wave (DAW) into a saw-tooth wave with sharp gradient in dust density, very similar to those found in numerical solutions of the fully nonlinear fluid equations for...
We studied the effect of serum folate-binding protein (FBP) on folate radioassays and the relationship of the serum level of unsaturated FBP to the serum folate level in various clinical states. Our modification of a heat-extracted radioassay was compared to a whole serum radioassay. Our results confirmed the existence of elevated serum levels of unsaturated FBP in some normal subjects, in some...
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