• This data set contains data on particulate organic nitrogen concentration and particulate organic carbon concentration as well as stable isotope ratios for carbon and nitrogen. (ucar.edu)
  • We demonstrate the utility of phosphate oxygen isotope measurements for tracking anthropogenic phosphorus loadings with measurements on sewage treatment plant effluent, the Connecticut River, and an aquifer on Cape Cod. (confex.com)
  • These continental shelf sediments were previously linked to early cyanobacterial oxygen production, and provide a direct test of conflicting hypotheses concerning the importance of nitrogen oxyanions in the Late Archaean era. (nature.com)
  • The biogeochemical functioning of natural and engineered environments is closely linked to spatial and temporal variations in molecular oxygen (O2) concentrations. (uwaterloo.ca)
  • The biogeochemical cycling of phosphorus (P) in South and Southeast Asian floodplain and delta aquifers has received insufficient attention in research studies, even though dissolved orthophosphate (PO43−) in this region is closely linked with the widespread contamination of groundwater with toxic arsenic (As). (bournemouth.ac.uk)
  • Modeling the Tropical North East Atlantic low oxygen volume using a two-way nested physical-biogeochemical model by focusing on changes in its three-dimensional oxygen distribution and quantifying processes that contribute to the oxygen budget (supply, biological consumption). (sfb754.de)
  • To take advantage of this, her team have now armed the bacteria with a radioactive payload - attaching the isotope rhenium-188 to the listeria using a type of antibody. (newscientist.com)
  • All isotopes of an element, even those that are radioactive, react chemically in the same way. (cdc.gov)
  • Isotope Geochemistry, Geochronology. (uj.ac.za)
  • This dataset contains rosette bottle data from the U.S. Coast Guard Cutter Healy 09-01 cruise in March 2009, including salinity, temperature, macronutrients and stable oxygen. (ucar.edu)
  • Ultra-pure silicon can be doped with boron, gallium, phosphorus, or arsenic to produce silicon, which is used in transistors, solar cells, rectifiers, and other solid-state devices widely used in the electronics industry. (actionext.com)
  • Ultra high purity silicon can be doped with boron , gallium , phosphorus, or arsenic to produce silicon for use in transistors, solar cells , rectifiers, and other solid-state devices which are used extensively in the electronics industry .The name Silicon originates from the Latin word silex which means flint or hard stone. (americanelements.com)
  • This is important, as is constitutes a reasonable level of uncertainty for phosphorus cycling studies which need to estimate bedrock δ18O‐PO4 composition based on the literature. (nerc.ac.uk)
  • Microbial activity acts to equilibrate the oxygen isotope composition of PO 4 with that of ambient water as a function of temperature. (confex.com)
  • The molar mass of Oxygen = 16.00 × 1 = 16 g/mole The molar mass of Hydrogen = 1.01 × 2 = 2.02 g/mole Now, using the molar mass of each of the given elements, we find out the percentage composition of each element in H2O. (balimed.org)
  • Solution for Calculate the % composition by mass of each element in phosphorus oxychloride POCl3. (balimed.org)
  • Code to add this calci to your website Since water is #"H"_2"O"# (molar mass is #"18.015 g/mol"#), it implies we have a percent composition of #"H"# and one for #"O"#. For water we have to calculate it % of Oxygen and % of Hydrogen, Its long calculation to do it here but this video will help. (balimed.org)
  • therefore % of water of crystallisation in the crystals = 100 x 126/246 = 51.2% H 2 O An example that illustrates percent composition is calculating the percentage of oxygen in air, which is 21 percent. (balimed.org)
  • Elemental composition of water column particles: what is inorganic particulate phosphorus? (sfb754.de)
  • Schrader D.L., Nagashima K., Krot A.N., Ogliore R.C. & Hellebrand E. (2014) Variations in the O-isotope composition of gas during the formation of chondrules from the CR chondrites. (hawaii.edu)
  • Bizimis, M., Salters, V., Garcia, M.O, Norman, M.D., The composition and distribution of the rejuvenated component across the Hawaiian plume: Hf-Nd-Sr-Pb isotope systematics of Kaula lavas and pyroxenite xenoliths. (hawaii.edu)
  • Based on the results, mariculture areas exhibited high concentrations of dissolved inorganic nitrogen (DIN) especially ammonium (NH 4 + ), and dissolved inorganic phosphorus (DIP) primarily due to decomposition of uneaten and undigested fish feeds, and fish excretions. (atlas.jp)
  • There is a reciprocal relationship between serum calcium and inorganic phosphorus. (cdc.gov)
  • Elevated Mercury Concentrations and Isotope Signatures (N, C, Hg) in Yellowfin Tuna (Thunnus albacares) from the Galápagos Marine Reserve and Waters off Ecuador. (harvard.edu)
  • Mercury Stable Isotopes Reveal Influence of Foraging Depth on Mercury Concentrations and Growth in Pacific Bluefin Tuna. (harvard.edu)
  • We analyzed the concentrations of non-structural carbohydrates (NSC), nitrogen (N) and phosphorus (P), and compared the differences in remobilization efficiency of NSC, N, and P between leaves and shoots within each species and between the two species along the elevational gradients. (sisef.it)
  • In such cases, disequilibrated oxygen isotope compositions for dissolved PO 4 may prevail and provide a diagnostic source signal. (confex.com)
  • Davidson J., Krot A.N., Nagashima K., Hellebrand E. & Lauretta D. (2014) Oxygen isotope and chemical compositions of magnetite and olivine in the anomalous CK3 Watson 002 and ungrouped Asuka‐881595 carbonaceous chondrites: Effects of parent body metamorphism. (hawaii.edu)
  • To elucidate the reasons for this sustained eutrophication and determine their implications to management for the mitigation of recurring algal blooms, hypoxia and fish kills, the nutrient dynamics of nitrogen (N) and phosphorus (P) was studied for Bolinao and its adjacent coastal town of Anda. (atlas.jp)
  • For example, chlorine has two major isotopes. (balimed.org)
  • Since each single bond contains #2# bonding electrons, one from chlorine and one from phosphorus, it follows that the more electronegative chlorine will take the electron it contributed to the bond, shown in the above image in blue, and the electron phosphorus contributed to the bond, shown in red. (abanic.ir)
  • The phosphorus atom loses a total of 5 electrons, one to each chlorine atom, so its oxidation state will be +5. (abanic.ir)
  • By weight, silicon makes up 25.7 percent of the earth's crust and is the second most abundant element after oxygen. (actionext.com)
  • Silicon is the second most abundant element in the Earth's crust, exceeded only by oxygen. (400.su)
  • But chemists had serious problems preparing pure silicon because it bonds tightly to oxygen. (400.su)
  • It took chemists many years to find out how to separate silicon from oxygen. (400.su)
  • The siloxanes are made up of silicon, oxygen, and an organic group. (400.su)
  • One such method could be identifying biotic alteration of the geochemical cycling of phosphorus, as was highly publicized during the recent discovery of phosphine in the atmosphere of Venus . (geobites.org)
  • Researchers have taken the first step in this search by characterizing biological phosphorus cycling in the analog environment of the Atacama Desert - an endeavor that has applied novel techniques in chemistry to provide insights about the movement of phosphorus in arid environments. (geobites.org)
  • Potassium Isotopes" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (umassmed.edu)
  • K-41 is a stable potassium isotope. (umassmed.edu)
  • This graph shows the total number of publications written about "Potassium Isotopes" by people in this website by year, and whether "Potassium Isotopes" was a major or minor topic of these publications. (umassmed.edu)
  • Below are the most recent publications written about "Potassium Isotopes" by people in Profiles. (umassmed.edu)
  • EBUSs are considered hotspots of climate change with predicted expansion of mesopelagic oxygen minimum zones (OMZs) and related changes in the frequency and intensity of upwelling of nutrient-rich, low-oxygen deep water. (copernicus.org)
  • Isotopes are atoms of the same element that have different numbers of neutrons, resulting in different atomic weights. (proprofs.com)
  • Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. (proprofs.com)
  • Excess phosphorus (P) loading increases the frequency of harmful algal blooms (HABs), posing severe threats to drinking water security and aquatic ecosystems. (uwaterloo.ca)
  • Isotopes are atomic species of the same chemical element (and therefore with the same atomic number (Z) or number of protons ) which differ with respect to their number of neutrons . (radiopaedia.org)
  • The atomic weight is only an average of relative weights of an atom and its isotopes, and it may vary from the weight of a specific isotope. (proprofs.com)
  • The explanation for the given correct answer is that the atomic weight is indeed an average of the relative weights of an atom and its isotopes. (proprofs.com)
  • Therefore, the atomic weight listed on the periodic table is an average value that takes into account the abundance of each isotope. (proprofs.com)
  • As a result, the atomic weight may vary from the weight of a specific isotope. (proprofs.com)
  • A group of researches was able to show why the transformation of phosphorus minerals by lightning could have been an important source of this element during Earth's infancy. (geobites.org)
  • Isotopes differ from each other only in the number of electrons contained. (proprofs.com)
  • Therefore, the statement that isotopes differ from each other only in the number of electrons contained is false. (proprofs.com)
  • Isotopes are forms of the same element, but differ in the number of neutrons within the nucleus. (cdc.gov)
  • Continuous water-quality monitors were mounted to a boat at approximately 0.5-meters below the water surface and used to measure nitrate, chlorophyll fluorescence (fChl), fluorescent dissolved organic matter (fDOM), dissolved oxygen, specific conductance, phycocyanin fluorescence (fPC), turbidity, pH, and temperature. (sciencebase.gov)
  • The bacteria also play a part by producing reactive oxygen molecules that again damage the tumour's DNA. (newscientist.com)
  • In addition, we try to follow the fate of certain elements/molecules and to identify processes these elements/molecules undergo during the passage through the ecosystem using isotope tracers. (uni-tuebingen.de)
  • It does not combine with oxygen or most other elements. (400.su)
  • What are the oxidation states of phosphorus in the following (i) H3PO3 (ii) PCl3 (iii) Ca3P2 (iv) Na3PO4 (v) POF3 asked Apr 9 in p Block Elements by Rukmani ( 51.1k points) p - block element What is oxidation number for PH3? (abanic.ir)
  • A stable isotope analysis of PO43−-bound oxygen indicated the influences of intracellular microbial cycling as well as a specific PO43− source with a distinct isotopically heavy signal. (bournemouth.ac.uk)
  • Therefore each isotope of an element has a different mass number (A), which is the simple summation of the number of protons and neutrons. (radiopaedia.org)
  • To see the isotopes that exist in the ScientificConstants package for a particular element, use the GetIsotopes function with the 'element' option specified. (maplesoft.com)
  • During this short but intense heating phase, the rock's or soil's mineralogy changes and a very important element for life becomes available: phosphorus. (geobites.org)
  • An isotope refers to any of the different forms of an element (thus, having the same number of protons) but having a different number of neutrons within their nuclei. (biologyonline.com)
  • Element % H: 8.89: P: 91.11: Isotope pattern for PH 3. (abanic.ir)
  • Our data reveal a dominantly anaerobic marine nitrogen cycle in which ammonium-replete ferruginous waters underlay an ephemeral oxygen oasis. (nature.com)
  • Restricted oxygen availability could have allowed the upwelling ammonium to reach the photic zone to provide ample nitrogen to fuel a prolific Late Archaean biosphere. (nature.com)
  • I mpact of internal oceanic variability on simulated oxygen distributions (at the global scale and with focus on the Eastern Equatorial Pacific) and associated mechanisms. (sfb754.de)
  • Analysis of the ratio of the oxygen isotopes of phosphate (δ 18 O p ) from different environmental samples showed that rivers (14.4 ± 0.2 ‰) and fish feed (21.8 ± 0.4 ‰) are two contrasting end-member sources of phosphate to the mariculture areas. (atlas.jp)
  • In which one of the following compounds is the oxidation number of phosphorus equal to 5? (abanic.ir)
  • This graph shows the total number of publications written about "Mercury Isotopes" by people in Harvard Catalyst Profiles by year, and whether "Mercury Isotopes" was a major or minor topic of these publication. (harvard.edu)
  • First, determine the fractional percent of each isotope in the substance. (balimed.org)
  • Determine the Oxidation number of phosphorus in thefollowing. (abanic.ir)