Abstract Background Biologically derived airborne contaminants
... originating in an organism. Bioaerosols are defined as suspended particles consisting of or derived from living organisms. Viruses, pathogenic and non-pathogenic microorganisms, allergens, endotoxins, mycotoxins, peptidoglycans and others also fall under this definition. Biological hazards are assoc ...
... originating in an organism. Bioaerosols are defined as suspended particles consisting of or derived from living organisms. Viruses, pathogenic and non-pathogenic microorganisms, allergens, endotoxins, mycotoxins, peptidoglycans and others also fall under this definition. Biological hazards are assoc ...
Radiation pressure on non-spherical dust grains in envelopes of late
... Recently, Netzer & Elitzur (1993) and Habing et al. (1994) have connected the rate of mass loss from cool giants with the observed gas outflow velocity. The shape of particles should be an important factor that affects the momentum transfer. However, this effect has been considered only in a few cas ...
... Recently, Netzer & Elitzur (1993) and Habing et al. (1994) have connected the rate of mass loss from cool giants with the observed gas outflow velocity. The shape of particles should be an important factor that affects the momentum transfer. However, this effect has been considered only in a few cas ...
Wet processing of adolescent Pennisetum purpureum for enhanced
... Samples pretreated at optimal conditions for each preprocessing stream were enzymatically hydrolyzed following an established protocol.2 The cumulative sugarrelease from each stream was used to determine the attainable sugar yields, and the highest yielding stream (Stream 3) was used as a substrate ...
... Samples pretreated at optimal conditions for each preprocessing stream were enzymatically hydrolyzed following an established protocol.2 The cumulative sugarrelease from each stream was used to determine the attainable sugar yields, and the highest yielding stream (Stream 3) was used as a substrate ...
PDF only - at www.arxiv.org.
... can only work effectively if the liberated mantle material remains in small enough particles that radiation forces can drag them into the Sun on time scale of a few million years, or Mercury would simply reaccrete the material. ...
... can only work effectively if the liberated mantle material remains in small enough particles that radiation forces can drag them into the Sun on time scale of a few million years, or Mercury would simply reaccrete the material. ...
Presentazione di PowerPoint
... Ever since the discovery paper by Becklin et al. (1969), the object IRC +10 216 (CW Leo) has spurred much interest. We now know that it is a carbon star in an advanced stage of stellar evolution on the asymptotic giant branch (AGB), pulsating and surrounded by an optically thick dust shell and large ...
... Ever since the discovery paper by Becklin et al. (1969), the object IRC +10 216 (CW Leo) has spurred much interest. We now know that it is a carbon star in an advanced stage of stellar evolution on the asymptotic giant branch (AGB), pulsating and surrounded by an optically thick dust shell and large ...
The prominent 1.6-year periodicity in solar motion due to the inner
... in steps of 1.67 years, on the average. A periodicity close to 1.6 years (about 600 days) was reported for the coronal hole area changes in cycle No. 21 (McIntosh et al., 1992). MTQP has also been examined in connection with large-scale photospheric motions (Valdés-Galicia and Mendoza, 1998) and it ...
... in steps of 1.67 years, on the average. A periodicity close to 1.6 years (about 600 days) was reported for the coronal hole area changes in cycle No. 21 (McIntosh et al., 1992). MTQP has also been examined in connection with large-scale photospheric motions (Valdés-Galicia and Mendoza, 1998) and it ...
Probiotics Can Make a Big Difference in Bird
... Probiotics Can Make a Big Difference in Bird Health Birds don’t transfer immunity to their young in the same way mammals do. Transfer of antibodies to the chick embryo occurs in two steps. First, antibodies are deposited in the egg yolk and egg white, and then transferred to the embryo. Even with a ...
... Probiotics Can Make a Big Difference in Bird Health Birds don’t transfer immunity to their young in the same way mammals do. Transfer of antibodies to the chick embryo occurs in two steps. First, antibodies are deposited in the egg yolk and egg white, and then transferred to the embryo. Even with a ...
Articles - Santa Fe Institute
... student, put together a tabletop apparatus designed to look at the kinds of chemical processes that might have occurred on the planet soon after its birth. They showed that organic molecules (in this case amino acids) could be created from inorganic materials by natural environmental conditions such ...
... student, put together a tabletop apparatus designed to look at the kinds of chemical processes that might have occurred on the planet soon after its birth. They showed that organic molecules (in this case amino acids) could be created from inorganic materials by natural environmental conditions such ...
Probiotics Can Make a Big Difference in Bird Health - Sav-A-Caf
... Probiotics Can Make a Big Difference in Bird Health Birds don’t transfer immunity to their young in the same way mammals do. Transfer of antibodies to the chick embryo occurs in two steps. First, antibodies are deposited in the egg yolk and egg white, and then transferred to the embryo. Even with a ...
... Probiotics Can Make a Big Difference in Bird Health Birds don’t transfer immunity to their young in the same way mammals do. Transfer of antibodies to the chick embryo occurs in two steps. First, antibodies are deposited in the egg yolk and egg white, and then transferred to the embryo. Even with a ...
The Earth In Space
... How did the planets form? What are the characteristics of the planets? How did the moon form? Is there life on mars? Why are the terrestrial planets so different? How many moons does jupiter have? What formed saturn’s rings? What minor objects are found in the solar system? What are comets? ...
... How did the planets form? What are the characteristics of the planets? How did the moon form? Is there life on mars? Why are the terrestrial planets so different? How many moons does jupiter have? What formed saturn’s rings? What minor objects are found in the solar system? What are comets? ...
electromagnetic spectrum
... Most of our knowledge about the universe comes from observations of visible light. Sometimes we can look directly at an object with our eyes. Sometimes we must use telescopes to aid our eyes. At other times, a more complex analysis is required. For example, scientists have discovered the composition ...
... Most of our knowledge about the universe comes from observations of visible light. Sometimes we can look directly at an object with our eyes. Sometimes we must use telescopes to aid our eyes. At other times, a more complex analysis is required. For example, scientists have discovered the composition ...
Numerical Data Indexing
... subject headings are assigned. Characteristics of particular importance include frequency, wavelength, power and energy. ...
... subject headings are assigned. Characteristics of particular importance include frequency, wavelength, power and energy. ...
selection of a disinfectant
... 4–10 °C to avoid the growth of potentially harmful bacteria in them. Hydrogen peroxide and peracids Like chlorine, hydrogen peroxide (H2O2) and peracids are strong oxidants and can be potent broad-spectrum germicides. They are also safer than chlorine to humans and the environment. Hydrogen peroxide ...
... 4–10 °C to avoid the growth of potentially harmful bacteria in them. Hydrogen peroxide and peracids Like chlorine, hydrogen peroxide (H2O2) and peracids are strong oxidants and can be potent broad-spectrum germicides. They are also safer than chlorine to humans and the environment. Hydrogen peroxide ...
GCE Chemistry Teachers` Guide (A2) Word Document
... practical side of chemistry, and this is obviously an essential part of the subject. However, the way in which scientists work and how the ideas that they generate are further developed is an essential part of the scientific process. New ideas and procedures are subject to professional scrutiny as o ...
... practical side of chemistry, and this is obviously an essential part of the subject. However, the way in which scientists work and how the ideas that they generate are further developed is an essential part of the scientific process. New ideas and procedures are subject to professional scrutiny as o ...
Star Formation Regions and Planetary Nebulae
... star formation, the diffuse ISM, active galactic nuclei, and planetary nebulae – or anywhere the flux of FUV photons is large enough to influence the heating and chemistry of the region. Such regions emit nearly all of the far infrared emission in the Galaxy and comprise most of the mass. Detailed m ...
... star formation, the diffuse ISM, active galactic nuclei, and planetary nebulae – or anywhere the flux of FUV photons is large enough to influence the heating and chemistry of the region. Such regions emit nearly all of the far infrared emission in the Galaxy and comprise most of the mass. Detailed m ...
The Influence of pH on the Antibacterial Action of
... Turbidimetry. All turbidimetric measurements were carried out with a Coleman model 11 spectrophotometer, at 650 mp, using 18 mm. test tubes. Preparation oftest organisms. Forty ml. of sterile nutrient broth in a 250 ml. nephelometer flask were inoculated with young cultures of Staphylococcus aureus ...
... Turbidimetry. All turbidimetric measurements were carried out with a Coleman model 11 spectrophotometer, at 650 mp, using 18 mm. test tubes. Preparation oftest organisms. Forty ml. of sterile nutrient broth in a 250 ml. nephelometer flask were inoculated with young cultures of Staphylococcus aureus ...
Diapositive 1
... are in a position of a quaternary carbon or an heteroatom. The presence of two quaternary carbons (170.2 and 105.0 ppm), one methine (95.6 ppm), one methylene (71.6 ppm), and two equivalents of methyl groups (40.4 ppm) were deduced from the DEPT spectrum. The assignment of the connected protons to t ...
... are in a position of a quaternary carbon or an heteroatom. The presence of two quaternary carbons (170.2 and 105.0 ppm), one methine (95.6 ppm), one methylene (71.6 ppm), and two equivalents of methyl groups (40.4 ppm) were deduced from the DEPT spectrum. The assignment of the connected protons to t ...
Technical data sheet Sodium Pyruvate 100mM
... Storage conditions : +2°C to +8°C Shelf life : 48 months Sterility tests : - Bacteria in aerobic and anaerobic conditions - Fungi and yeasts Endotoxin : < 1 EU/ml Composition : Sodium Pyruvate 11 g/l Recommended use : - Respect storage conditions of the product - Do not use the product after its exp ...
... Storage conditions : +2°C to +8°C Shelf life : 48 months Sterility tests : - Bacteria in aerobic and anaerobic conditions - Fungi and yeasts Endotoxin : < 1 EU/ml Composition : Sodium Pyruvate 11 g/l Recommended use : - Respect storage conditions of the product - Do not use the product after its exp ...
EXPOSE
EXPOSE is a multi-user facility mounted outside the International Space Station dedicated to astrobiology. EXPOSE was developed by the European Space Agency (ESA) for long-term spaceflights and was designed to allow exposure of chemical and biological samples to outer space while recording data during exposure.The results will contribute to our understanding of photobiological processes in simulated radiation climates of planets (e.g. early Earth, early and present Mars, and the role of the ozone layer in protecting the biosphere from harmful UV-B radiation), as well as studies of the probabilities and limitations for life to be distributed beyond its planet of origin. EXPOSE data support long-term in situ studies of microbes in artificial meteorites, as well as of microbial communities from special ecological niches. Some EXPOSE experiments investigated to what extent particular terrestrial organisms are able to cope with extraterrestrial environmental conditions. Others tested how organic molecules react when subjected for a prolonged period of time to unfiltered solar light.