[en] This compilation is divided into four sections: alphabetical list of customers; alphabetical list of isotopes; alphabetical list of states and countries; and stable isotope sales

[en] This report contains a listing of electromagnetically separated stable isotopes which are available at the Oak Ridge National Laboratory for distribution for nondestructive research use on a loan basis. This inventory includes all samples of stable isotopes in the Research Materials Collection and does not designate whether a sample is out on loan or is in reprocessing. For some of the high abundance naturally occurring isotopes, larger amounts can be made available; for example, Ca-40 and Fe-56

[en] Starting from terms and definitions, some selected applications of stable isotopes, especially in the field of tracer techniquies, in chemistry, biochemistry, biology, medicine, and agriculture are dealt with. Analytical methods for stable isotopes are only outlined. An extensive bibliography with about 700 references has been included

No abstract available

[en] This report contains a listing of electromagnetically separated stable isotopes which are available at the Oak Ridge National Laboratory for distribution for nondestructive research use on a loan basis. This inventory includes all samples of stable isotopes in the Research Materials Collection and does not designate whether a sample is out on loan or is in reprocessing. For some of the high-abundance, naturally occurring isotopes, larger amounts can be made available; for example, Ca-40 and Fe-56

[en] A listing is given of Mound Facility's sales of stable isotopes of noble gases, carbon, oxygen, nitrogen, chlorine, and sulfur for Fiscal Year 1979. Purchasers are listed alphabetically and are divided into domestic and foreign groups. A cross-reference index by location is included for domestic customers. Cross-reference listings by isotope purchased are included for all customers

No abstract available

[en] This compilation is published as an aid to those concerned with the separation and sale of stable isotopes. The information is divided into four sections: alphabetical list of domestic and foreign customers, showing the stable isotopes purchased during the fiscal year; alphabetical list of isotopes, cross-referenced to customer numbers and divided into domestic and foreign categories; alphabetical list of states and countries, cross-referenced to customer numbers and divided into domestic and foreign categories; alphabetical list of states and countries, cross-referenced to customer numbers and indicating geographical concentrations of isotope users; and tabulation of the shipments, quantities, and dollars for domestic, foreign, and project categories for each isotope

[en] The tragic consequences of vitamin A deficiency (blindness, illness, and premature death) have stimulated extensive efforts to prevent this deficiency. Perhaps most notable in scope and influence is the WHO’s recommendation since 1998 that high-potency supplements should be given every 4–6 months to children 6 to 59 months old who live in the affected regions of the world. The WHO estimates that 1.25 million deaths in 40 countries have been averted by this programme. Many of these countries have also addressed the problem by fortifying commonly consumed foods, such as cooking oil or sugar. Agricultural programmes have developed both biofortified and genetically modified foods with increased vitamin A content

[en] Full text: Beach rocks, a common feature of northeastern coastline of Brazil are formed in the inter tidal zone, considered as ancient coastal line, cemented by CaCO₃ which have variable extension. They occur parallel to the coastline as linear ridges. Beach rocks are sub horizontally disposed and surfaces are irregular, displacing potholes due to differential erosion, perforations by organisms, diaclasis, cross stratification and rare laminations. The dominant detrital components are quartz and minor fractions of feldspars and rock fragments. Zircon, epi dote, hornblende, garnet, muscovite, rutile, opaque and sillimanite are present in trace quantity. Bivalves, mollusks, gastropods, halimeda, corals, pelecipods and equinoids, constitute the biotic components. Beach rocks cement vary from aragonite to Mg-calcite. The dominant micro facies, consists of isopach crystals of aragonite, enclosing bioclastic and/or clastic grains forming uniform fringe formed in the marine phreatic zone. The second is represented by cryptocrystalline inter-granulate cement like micritic envelop formed in meteoric phreatic environment (Moore 1971). The third is formed by inter granulate cryptocrystalline cement, filling the pores. Beach rock samples locate in the coastal zone show an interval with depleted C and O ratios (average δ¹³ C = -1.3%0, δ¹⁸ O = -2.1%0) and an interval of enriched isotopic ratios (average δ¹³ C = +3.5%0, δ¹⁸ O +1.2%0). Depleted oxygen isotope values considered to be indicative of meteoric diagenesis with minor freshwater influx (Allan and Mattew 1982). (author)