Radiocarbon dating definition, the determination of the age of objects
of organic origin by measurement of the A very small percentage of carbon, however, consists of the isotope carbon 14, or radiocarbon, which is unstable.
Radiocarbon dating definition, the determination of the age of objects
of organic origin by measurement of the radioactivity of their carbon content.
Correction: This article has been updated to clarify that it is the ratio of different carbon isotopes, not just the presence of those isotopes, that is characteristic
of organic origin.
Two of these graphite flecks had a high carbon - 12 to carbon - 13 isotope ratio, a characteristic feature
of organic origins as life preferentially absorbs carbon - 12 (PNAS, doi.org/8jk).
• There's more to life than that: we meant to say that graphite flecks in 4.1 - billion - year - old zircon crystals had a ratio of carbon - 12 to carbon - 13 isotopes that is characteristic
of organic origins (24 October, p 12).
Not exact matches
Fraternity: as between man and man, in the sense
of an
organic interrelation based not merely on our more or less accidental coexistence on the surface
of the earth, or even on our common
origin, but on the fact that we represent, all
of us together, the front line, the crest
of an evolutionary wave still in full flood.
«The
origin and the story
of our
organic cane sugar is about helping a group
of producers, their families, their community, and the environment,» explains Andres.
«We seek wines
of true distinction that represent the terroir from which they hail, preferably from
organic origins and are made by families and individuals who share our life philosophies,» said Andre Shearer, Cape Classics» Chairman & CEO.
Related topics: Bakery, Beverage,
Organics, GM food, Food safety, Nutrition labelling, Market Trends, Confectionery, Dairy, Healthy foods, Prepared foods, Snacks, Marketing, Country
of origin labelling, Sustainability, Food prices, Natural and clean label
Non-EU
organic products must include country
of origin labeling if they wish to use the EU
organic logo.
The technology can be used wherever industry has a biological waste stream or wastewater with high
organic carbon or COD (chemical oxygen demand)
of natural
origin that can be broken down into biogas by anaerobic bacteria.
The coffee line is fairly extensive, and includes ground and whole bean, flavored coffees, Fair Trade and
organic certified options, blends and single
origins, and some even higher - end Direct Trade and Cup
of Excellence (CoE) choices (the latter being part
of this line since 2006).
The anaerobic wastewater biogas technologies — which extract methane to generate green electricity or to fuel boilers and other factory equipment — are particularly applicable to food, beverage and agribusiness companies, or any industry that has a biological waste stream or wastewater with high
organic carbon or COD (chemical oxygen demand)
of natural
origin that can be broken down into biogas by anaerobic bacteria.
The whole 365 brand - USDA Certified
organic - and country
of origin - China - thing stuck in my craw, but the final straw for me was the Mackey op ed piece on healthcare reform.
The ACO logo verifies the
organic status
of the product and not the product
of origin.
The logo is not a country
of origin logo, but a confirmation
of organic status, which complies with the Australian Certified
Organic Standard.
Issue 6 October 2013 Advances in nanotechnology for food and beverage processing, proving the
origin of produce with «environmental fingerprinting», the mega-trend
of sustainable sourcing, what the UK diary code
of practice has achieved in its first year, the rise
of the
organic food market, how the new universal front -
of - pack labels in the UK have been received by the industry, and more
«Both Oregon Tilth's and CCOF's
origins date back to the 1970s amidst growing interest in the benefits
of organic farming,» said Chris Schreiner, Executive Director
of Oregon Tilth.
The company is a USDA - certified
organic handling facility and the largest supplier
of organic and Fair Trade certified tea in North America, working closely with several third - party certifiers at
origin worldwide.
Manchester City's rise to power and wealth was never the most
organic origin story, but the arrival
of Pep Guardiola was at least supposed to bring some balance to the whole club.
It's an homage to our
organic baby fashion's country
of origin: India.
The vapor accompanying these particles was mostly water but contained trace amounts
of simple
organic compounds, as well as carbon dioxide and ammonia — all ingredients important for the sustenance and even
origin of life.
Bennu is a carbonaceous asteroid packed with natural
organic compounds, which gives it an intriguing connection with the
origin of life.
Evidence for such an
origin might be bolstered if scientists find signs
of other materials known to be present in comets, like carbon - based compounds called
organics.
«This information is important because consumers, in theory, can get both
organic and country -
of -
origin information in the same supermarket,» Gao said.
Marshall and his colleagues proved the concept
of testing for vanadium on known microfossils with acknowledged biological
origins on Earth —
organic microfossils called acritarchs that might not be far from the kinds
of traces
of life possibly existing on the Red Planet.
The
organic origin (biogenicity)
of the samples was confirmed using an ion probe to measure the different sulfur isotopes, while X-ray microtomography revealed their internal and external structures.
«It is a thrilling possibility that this influx
of dust on the surfaces
of solar system bodies has acted as a continuous rainfall
of little reaction vessels containing both the water and
organics needed for the eventual
origin of life.»
By studying the gas, dust and structure
of the nucleus and
organic materials associated with the comet, via both remote and in - situ observations, the Rosetta mission should be a key to unlocking the history and evolution
of our solar system, as well as answering questions regarding the
origin of Earth's water and perhaps even life.
Other molecules may help explain the
origins of the
organic compounds that gave rise to life on Earth.
«Then you have potentially ruined your chances for looking at the
origin of organic material or potentially life forms» on Phobos, he says.
Flecks
of carbon
of potentially
organic origin seen in zircon crystals, hinting that life started 4.1 billion years ago in Earth's fiery Hadean period Hadean aeon
Flecks
of carbon
of potentially
organic origin seen in zircon crystals, hinting that life started 4.1 billion years ago in Earth's fiery Hadean period
The approach, called tunable infrared laser direct absorption spectroscopy, detects the ratio
of methane isotopes, which can provide a «fingerprint» to differentiate between two common
origins: microbial, in which microorganisms, typically living in wetlands or the guts
of animals, produce methane as a metabolic byproduct; or thermogenic, in which
organic matter, buried deep within the Earth, decays to methane at high temperatures.
«Despite their small size, these interplanetary dust particles may have provided higher quantities and a steadier supply
of extraterrestrial
organic material to early Earth,» said Michael Callahan
of NASA's Goddard Space Flight Center in Greenbelt, Md. «Unfortunately, there have been limited studies examining their
organic composition, especially with regards to biologically relevant molecules that may have been important for the
origin of life, due to the miniscule size
of these samples.»
This addition to the inventory
of organic compounds produced in extraterrestrial environments furthers the discourse
of whether their delivery to the early Earth by comets and meteorites might have aided the molecular evolution that preceded the
origins of life.
Previous evidence
of preserved collagen date back to the Late Cretaceous Period — more than 100 million years younger than this discovery — but those studies extracted the
organic remains by dissolving away all other parts
of the fossil, without a clear understanding
of the precise
origins of the collagen.
Finding out how methane and other
organic species are formed in deep - sea hydrothermal systems is compelling because these compounds support modern day life, providing energy for microbial communities in the deep biosphere, and because
of the potential role
of abiotically - formed
organic compounds in the
origin of life.
But it is not clear whether RNA preceded or followed the
origin of metabolism, which relies on the chemistry
of much simpler
organic compounds.
«Geology
of Ceres illuminates
origin of organics: Dawn spacecraft data suggest
organic materials are native to the dwarf planet.»
Studying its
organics can help explain the
origin, evolution, and distribution
of organic species across the solar system.
Nitrogen - containing compounds
of this sort are especially interesting because they may have played a role in forming
organic compounds involved in the
origin of life.
«
Origin of organic matter in Apollo lunar samples revealed by new NASA study.»
The issue for scientists has been that it is not easy to look at simple chlorine - containing
organic molecules and determine the
origin of the
organic compound components.
By studying the gas, dust and structure
of the nucleus and
organic materials associated with the comet, the Rosetta mission should become key to unlocking the history and evolution
of our solar system, as well as answering questions regarding the
origin of Earth's water and perhaps even life.
But it was the Miller experiment, placed in the Darwinian perspective provided by Oparin's ideas and deeply rooted in the 19th - century tradition
of synthetic
organic chemistry, that almost overnight transformed the study
of the
origin of life into a respectable field
of inquiry.
The assumption
of an abiotic
origin of organic compounds rested on firm grounds.
My research focuses on developing robust multiscale computational paradigms to model the structure - property relations
of minerals in order to develop a fundamental understanding
of the
origins of water and
organic materials in our Solar System.
My research is focused on the
origin of the first solar - system solids, ancient presolar circumstellar dust grains, primitive
organic compounds, interplanetary dust particles, and the evolution
of asteroidal bodies.
Scientists expect Bennu to hold vital clues to the
origin of water and
organic molecules that may have made their way to Earth, eventually creating conditions needed for life to exist.