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Topic: Core sample

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	Core - Wikipedia, the free encyclopedia
		In archaeology, a core is a distinctive artifact that results from the practice of lithic reduction.
		In this sense, a core is the scarred nucleus resulting from the detachment of one or more lithic flakes from a lump of source material or tool stone, usually by using a hard hammer percussor such as a hammerstone.
		In astrophysics and geology, a planetary core is the composite material at the centre of a planet.
	en.wikipedia.org /wiki/Core (735 words)

	Oilfield Glossary: Term 'core'
		The core catcher serves to grip the bottom of the core and, as tension is applied to the drillstring, the rock under the core breaks away from the undrilled formation below it.
		Cores can be full-diameter cores (that is, they are nearly as large in diameter as the drill bit) taken at the time of drilling the zone, or sidewall cores (generally less than 1 in.
		Cores samples are used for many studies, some of which relate to drilling fluids and damage done by them.
	www.glossary.oilfield.slb.com /Display.cfm?Term=core (379 words)

	Wilson M. Laird Core and Sample Library (Site not responding. Last check: 2007-10-31)
		Sampling is done by core library staff with the permission of the director and is dependent upon the condition of the core.
		Cores and samples may be shipped upon request at the expense of the user.
		Sampling of the cores or samples for thin section or destructive purposes must be stated prior to shipment.
	www.state.nd.us /ndgs/core_Library/clib.htm (559 words)

	Sample - Wikipedia, the free encyclopedia
		Sample (statistics), the part of a statistical population which is actually observed
		Sampling (signal processing), the process of recording of sound as a series of numbers which represent the sound's amplitude
		Sampling (music), a short phrase of a recording used as an element in a new piece of music
	en.wikipedia.org /wiki/Sample (169 words)

	Ohio Geological Sample Repository Core-Use Policy (Site not responding. Last check: 2007-10-31)
		Sampling of cores must be kept to the minimum (i.e., generally not more than a quarter (1/4) core for cores 2 inches or less in diameter nor more than an eighth (1/8) core for cores greater than 2 inches in diameter).
		Thin sections, polished sections, sample residues, etc. made from sampled portions of the cores shall be returned to the DGS at the conclusion of the project to become part of its permanent library for the benefit of the public.
		In the event returned core is determined to have been damaged, improperly handled or sampled, or is otherwise in poor condition, the borrower will forfeit the privilege of borrowing other materials from the core repository.
	www.dnr.state.oh.us /geosurvey/corelib/policy.htm (688 words)

	Archaeology Wordsmith (Site not responding. Last check: 2007-10-31)
		This sampling technique is based on a totally random selection of sample units to be investigated, which each unit having an equal chance of being selected.
		The degree to which a sample is truly representative is controlled by the size of the sample and biasing factors affecting its selection.
		Samples are arranged in a regular pattern to ensure even coverage with only the starting point chosen randomly.
	www.reference-wordsmith.com /cgi-bin/lookup.cgi?category=&where=headword&terms=sample (749 words)

	Collecting Moon Rocks During the Apollo Program
		The sample collection to be performed at each field stop was carefully planned prior to the start of the mission.
		The Special Environmental Sample Container used a special seal to ensure that the enclosed sample was protected from atmospheric gases prior to being opened in a vacuum chamber at the Johnson Space Center.
		The lunar samples were stored inside the ascent stage of the lunar module for the trip back to lunar orbit.
	www.lpi.usra.edu /expmoon/Apollo11/A11_Samples_tools.html (837 words)

	Core and Sample Division \| Canadian Society of Petroleum Geologists (CSPG)
		In our initial meeting, some of the “leading edge” researchers that are working on these reservoirs will share their views on the current situation of core and sample availability, and we will be inviting EUB staff that are involved in formulating regulations for sample requirements to update us on current and future regulations.
		Core culled from the research center would either be destroyed, returned to the current operator or stored in a regulated manner under government contract at private storage facilities.
		After extensive discussion the CSPG Core and Sample Division, Oil Sands Discussion Group strongly recommends that the AEUB create and run in the Calgary area a core storage and viewing facility, which is dedicated to the long term retention of material related to the Oil Sands resource in this province.
	www.cspg.org /events/divisions/core-and-sample.cfm (1028 words)

	Taking core samples (Site not responding. Last check: 2007-10-31)
		A core sampler is like a long tube you push into the bottom of a sediment basin, and when you pull it out, you extract a long column of sediments from the bottom.
		The Livingstone core is about 2 inches in diameter, and with extensions can extract up to 5 metres of sample from the bottom of a shallow pond or lake.
		Organic samples from the point of contact between the marine and terrestrial sediments, can be radiocarbon dated, establishing when the sea level lowered and a former arm of the sea became the lake it is today.
	web.uvic.ca /~qxm/test/core_samples.htm (456 words)

	Introduction to the DNA SeqCore
		The gel, sample handling and data analysis are extremely reliable and the Core personnel have a very low rate of error.
		When you check the status of your sample (see the Core's home page), it may be listed as "Running" as soon as it is assigned a lane in a gel, but that may occur the afternoon before we actually begin the reactions on your sample.
		As a precaution, we always check that control samples sequenced properly, that excess terminators were removed, that the gel resolution was adequate and that the computerized data extraction proceeded normally.
	seqcore.brcf.med.umich.edu /doc/dnaseq/intro.html (1108 words)

	Hand Augering and Core Sampling
		Split core sampling is particularly useful for both estimation of soil strength (via the Standard Penetration Test (SPT)) and collection of a relatively undisturbed soil samples.
		If a more undisturbed sample is desired, a thin-walled stainless steel tube (commonly known as a Shelby tube) is inserted inside the sampler to protect the sample during extraction and transport to the laboratory.
		A 2" diameter, 18" length split core sampler is used as part of the Standard Penetration Test (ASTM-D-1586-84), a standardized method to measure soil restitance to core penetration.
	ewr.cee.vt.edu /environmental/teach/smprimer/core/core.html (784 words)

	AAPG Core & Sample Preservation Committee - Projects (Site not responding. Last check: 2007-10-31)
		The rock core and cuttings are estimated to represent a significant fraction (perhaps 60 percent) of the core and cuttings held by the major oil and gas companies.
		Second, sample data is now critical because of the rapid advances in geologic, geophysical, and engineering science that have accompanied the “computer revolution.” These advances have imposed the need to re-examine and, at times, re-analyze existing samples in the light of new understanding.
		For these reasons, the AAPG Committee on Preservation of Cores and Samples was revitalized in 1995 and is again involved in analyzing conditions that threaten the survival of sample material.
	www.aapg.org /committees/preserve_core_samples/projects.shtml (3950 words)

	Science Center, Cupcake Core Sampling
		Rather than digging up vast tracts of land to expose an oil field or to find some coal bearing strata, core samples can be taken and analyzed to determine the likely composition of the Earth's interior.
		In this activity students model core sampling techniques to find out what sort of layers are in a cupcake.
		Have them take three core samples and draw their findings in the appropriate square (#3).
	www.simplot.com /education_council/cupcake_core_sampling.cfm (408 words)

	Deep-Sea Sample Repository, Lamont-Doherty Earth Observatory of Columbia University
		Data on cores is forwarded to the National Geophysical Data Center (NGDC) in Boulder, Colorado for inclusion in the national database.
		The sampling can be done without removing the sediment from the tray which in the past has been a problem for maintaining the integrity of dried sediment.
		Detailed records are kept for each core regarding sample history, i.e., name of investigator, date, purpose, core or dredge, intervals, and sample size, and publications resulting from use of the material.
	www.ldeo.columbia.edu /CORE_REPOSITORY/RHP5.html (1212 words)

	06/10/99 -- Scientists: Ice core sample attests to warming climate
		As the longest ice core record of Earth's weather history obtained to date, the core also shows that those gases -- carbon dioxide and methane -- play a big role in warming the planet when ice ages end.
		The core was extracted from 1992-98 by a U.S.-Russian-French team at Russia's Vostok research station, the coldest spot on Earth.
		But the core also appears to call into question previous research suggesting a 500- to 1,000-year lag time between the post-ice age temperature increase and the CO2 increase.
	www.climateark.org /articles/1999/icecore2.htm (800 words)

	Core Laboratories: General Clinical Research Center at Yale
		To this end the Core Lab provides an investigator with access to selected analyses and procedures that might otherwise be unavailable or too expensive.
		Core Laboratories are funded by NIH but designed by individual Centers.
		The Center is connected to the YNHH sample transport system which enables routine chemistries to reach Laboratory Medicine quickly.
	info.med.yale.edu /gcrc/corelab (401 words)

	Core collectin in cross-pollinated species: pearl millet
		The phenotypic associations observed in the entire collection were preserved in the core sample as well as in the minimum core subset suggesting that the sampling for developing the core collection did not affect the phenotypic correlations arising from co-adapted gene complexes.
		To study the influence of genotype x season interaction on characterization of core collection, this core set was then planted in two seasons (rabi or post-rainy season 1998 and kharif or rainy season 1999).
		Records were taken on 60 plant observations for each core accession, to represent the maximum variability within accession and to describe the effect due to allogamous nature of the crop.
	www.icrisat.org /PearlMillet/Pearlmillet/coreMillet.htm (922 words)

	Center for Genetic Medicine < Genotyping Core Facility < Sample Collection and Handling
		The amount of DNA isolated from blood sample is highly dependent on the number of white blood cells present in the sample and the blood storage conditions.
		On average, 350ug of DNA is isolated from 10ml of fresh blood sample..
		Samples frozen at -80°C typically exhibit a 15% decrease in DNA yield.
	www.cgm.northwestern.edu /geno_storage.htm (362 words)

	Annual Report 2000 (Site not responding. Last check: 2007-10-31)
		The mission of the AAPG Committee on Preservation of Samples and Cores is to promote collection, preservation, and utilization of samples and cores as well as those data directly attributable to this rock material to include core analysis, sample descriptions, and stratigraphic assignment.
		The importance of core preservation was compounded by the fact that 70% of core was from company or government repositories.
		Core and Sample Preservation Committee supports broad distribution of the final policy statement to both government and industry decision makers.
	www.aapg.org /committees/preserve_core_samples/ar2000.html (717 words)

	N.F. Williams Well Sample Library
		The Arkansas Geological Commission (AGC) is the curator for the Norman F. Williams Well Sample Library and maintains well cuttings and core samples as a permanent record of rock strata that have been penetrated by wells drilled in Arkansas.
		The well samples are used by state and federal agencies, academia, industry, and the general public for geological research.
		The AGC has the discretion to permit or deny permission for the destructive analysis of the well samples and this determination will be made on a case-by-case basis based on the quantity of material that is present and the historical and scientific value of the sample.
	www.state.ar.us /agc/n_f.htm (594 words)

	Harris Uni-Core, for Cutting Core Samples
		The Harris Uni-Core consists of a razor sharp stainless steel cutting tip designed to cut, retrieve and store cored samples from source materials such as tissue, gels, paper, cloth, leaves, paint chips, films or other thin, soft substrates.
		Next, lift the cutter away from the sample and the cut sample will be retained in the cutter tip.
		Sample is retained in coring tip following extraction for preferred ejection.
	www.tedpella.com /histo_html/unicore.htm (422 words)

	Core Sample PCR
		I have applied a simple "core sampling" procedure - involving "coring" an agarose sample out of a gel, and using it as template for another round of PCR - to get around this problem, and obtain unique bands from initially messy backgrounds.
		Prepare "core samplers": using gloves and sterile scissors and cut off about 5mm from the tip of as many sterile yellow pipette tips (we use Gilson tips) as you will need for samples.
		Use "core samplers" to stab out one or more cores of agarose from the centre of bands of interest, using stabbed/notched gel lane as reference: a standard gel should give about 10ul per core.
	wheat.pw.usda.gov /~lazo/methods/101/101pcr.html (766 words)

	Hovedlaboratoriet: Core Subsampling Printer Friendly (Site not responding. Last check: 2007-10-31)
		There is no right or wrong: Sampling schemes need to be defined before hand and they need to be adjustable so that during the coarse of an investigation sub sampling can be modified and adjusted according to changing objectives.
		It is easy to loose control if sample size and number is not kept accurate in a core sampling log; do never try to reconstruct anything just do it over again.
		Sampling along the center axis of cores is a bad habit since it will exhaust excellent material quickly preventing further or additional sampling from that core level; always sample only one side of the core and sample only one quarter of the core.
	hjs.geol.uib.no /hovedlab/analysis_core_sampling_procedure_eng_printer.html (796 words)

	Affymetrix GeneChip Core Facility Sample Submission
		We require only 5 μg for standard analysis, however, we request a surplus of sample for quantification, performing Bioanalyzer analysis, and in case the process needs to be repeated.
		RNA must be provided at a minimum concentration of 1.5 μg/μl in a 1.5 ml RNase-free microcentrifuge tube clearly labeled with the sample name, concentration, and PI initials.
		Therefore it is extremely important to submit a copy of agarose gel showing loading wells and the RNA profile of each sample.
	info.med.yale.edu /wmkeck/affymetrix/submission.htm (256 words)

	USGS CMG MP Sample Distribution Policy
		Samples may be taken from the archive half only under special circumstances evaluated by and acceptable to the Curatorial Authority (see above).
		In all cases, metadata associated with the cores will be available as soon after the cruise as practical.
		After specific cores of interest are identified, more detailed searches for locations and descriptions of available sample materials can be made using the USGS Coastal and Marine Geology InfoBank.
	walrus.wr.usgs.gov /infobank/programs/html/main/sample-dist-policy.html (1146 words)

	HMC Math --- Sample Placement Examinations
		Placement out of other core math courses is determined either by examination or by a good grade in an sufficiently rigorous college course equivalent.
		Sample exam questions for Math 14, Part I (in PDF format).
		Sample probability exam questions for Math 62 (in PDF format).
	www.math.hmc.edu /placement (541 words)

	Samples
		Samples may be submitted for amplification and biotin-labeling in the Genomics Core lab or already labeled.
		Protocols for RNA sample labeling can be found in the Affymetrix GeneChip Expression Analysis Technical Manual (copies available in the Genomics Core facility and GMSR Bioinformatics Suite).
		RNA must be submitted to the core facility in aqueous solution (preferably RNase-free water), frozen on dry ice.
	www.gwumc.edu /microarray/equipment/samples.htm (414 words)

	Sample Request (Site not responding. Last check: 2007-10-31)
		Deep-sea core samples requested by NSF-funded investigators are generally approved upon receipt of request (subject to core material availability).
		Deep-sea core samples are released to non-NSF funded scientists upon approval by a small panel of Antarctic geoscientists.
		All requests for drill cores (i.e., CIROS, DVDP, ETV, etc.) and archive half samples from deep-sea cores may be subject to approval by the ARF sample approval panel.
	www.arf.fsu.edu /samplerequest.cfm (351 words)

	Building a Sample Core Data Application
		Core Data is a powerful data-management framework introduced with Mac OS X v10.4 Tiger.
		Core Data is well documented in the ADC Reference Library.
		Core Data by itself can do a lot for you, but it’s still up to you to write the custom code that makes your application unique.
	developer.apple.com /cocoa/coredatatutorial/index.html (879 words)

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