Sentences with phrase «dna analysis of samples»

Our DNA analysis of samples like these, many collected by colleague Steve Santhuff, has revealed that most river systems from Florida to Texas hold genetically unique populations, isolated for tens of thousands of years.

Not exact matches

The vine samples (assumed to be Nebbiolo) submitted by Pete Anderson of Eusinus Vineyards to the Plant Identification Lab at University of California, Davis Foundation Plant Services for DNA analysis matched the Lambrusca di Alessandria reference profile of the NCGR collection.

We did a full analysis of Candidatus Desulforudis audaxviator, an organism we found again and again in different mines in South Africa at the greatest depths — never above 2 kilometers (1.2 miles)-- that made up 99.9 percent of the DNA in some of our samples.

They also performed DNA analyses of water samples to identify larvae of vent animals and stable - isotope analysis to assess food supplies at each vent field.

HPV is detected using a DNA analysis that looks for characteristic sequences from the 13 high risk strains of the virus in the cervical cell sample.

«We can now obtain meaningful human, pathogen and dietary DNA from a single sample, which minimizes the amount of ancient material required for analysis,» said Warinner.

Spearheaded by first author Christopher McNair, PhD, a graduate student in the laboratory of Dr. Knudsen, the study undertook an extensive analysis of tumor samples and cell - free DNA samples from patients with advanced, lethal - stage prostate cancer.

The mtDNA sequence the researchers claimed to have obtained from the fossil is quite common in Europe today, making it difficult to rule out the possibility that someone not on the team touched the sample or the lab equipment used in the analysis, says evolutionary geneticist and ancient DNA expert Hendrik Poinar of McMaster University in Hamilton, Canada.

To test that idea, Komdeur used DNA analysis of blood samples to check the sex of the identical - looking nestlings during the 1993 to 1995 breeding seasons.

Analysis of the samples turned up DNA genetic material of a polar bear, a seal it had killed and a seagull that had been seen nearby.

After a successful interview, Phil started work as one of 10 new employees who were split into two groups, half being trained in the «front end» process — the actual extraction of the DNA from biological samples in the laboratories — and half learning the «back end» — computer analysis of the data.

23andMe is a personal genomics company that provides direct - to - consumer genetic testing and services that include the analysis of DNA samples to generate ancestry - related genetic reports.

To determine which variant of the receptor genes study participants possess, DNA was collected via saliva samples for genetic analysis.

A multicenter team of researchers reports that a full genomic analysis of tumor samples from a small number of people who died of pancreatic cancer suggests that chemical changes to DNA that do not affect the DNA sequence itself yet control how it operates confer survival advantages on subsets of pancreatic cancer cells.

• We should have made it clear that software analysis of DNA from the scene of the murder of Meredith Kercher indicated only that Amanda Knox's DNA was not present in one sample on a bra clasp found at the crime scene (6 July, p 15)

The sampling system combines three cutting edge technologies — an adapted Suspended Particulate Rosette (SUPR) multi-sampler, a REMUS autonomous underwater vehicle equipped with sensors, and identification of organisms by DNA barcode analysis.

Analysis of short DNA fragments from a pair of samples collected in India and Bhutan matched that of an ancient polar bear bone.

Current specialized tests that depend on microscopic or fluorescent analysis of stool samples or polymerase chain reactions (PCR) that amplify pathogen DNA are considered impractical for deployment in developing countries because of the need for expensive equipment and / or the electricity to operate it.

Participants are offered a battery of tests over time, including neuropsychological testing, MRI scans, DNA sequencing, and analysis of blood samples for biomarkers, such as those reflecting stress response.

First, samples of leaves from these plants are collected for in vitro cultures to isolate the fungi; then the DNA and RNA of fungi are extracted to sequence them and, through bioinformatic analysis, the researcher can determine the expression, the presence or absence of genes in the genomes of a species against each other.

PEOPLE suspected or convicted of sex offences, serious assaults or burglaries in England and Wales will have to give a sample of tissue or blood for DNA analysis from next month.

The study has solid geographical sampling, and the team's statistical analysis of two DNA genomes — mitochondrial and nuclear — shows pretty good evidence for the new species, says Bryan Stuart, a curator of herpetology at the North Carolina Museum of Natural Sciences in Raleigh, who was not involved in the work.

Now, DNA analyses of nine samples purported to be from the «abominable snowman» reveal that eight actually came from various species of bears native to the area.

The role of rebiopsy and repeat analysis in the setting of post-treatment relapse, along with testing of blood samples for mutations in circulating tumor cells, cell free tumor DNA, or exosomes will be considered.

Previous genetic analyses of a couple of «yeti» hair samples collected in India and Bhutan suggested that a stretch of their mitochondrial DNA resembled that of polar bears.

In the past few years has been an increase in the description of new endemic species of this biome along with the advance of molecular techniques and availability of samples for DNA analysis.

Palumbi and Roman base their figures on analysis of mitochondrial DNA in blood samples taken from more than 312 humpbacks, 370 fin whales, and 87 minke whales, mostly in the North Atlantic.

«Taking into account the actual characteristics of the DNA in old remains, an initial real time quantitative analysis of the mitochondrial DNA was taken to verify the state of preservation of the samples,» she explained.

Thirty - seven patients were excluded due to unavailability of the results of the genetic analysis of the tumor or cell - free DNA samples.

Allaby's team took four core samples of sediments from a section of the site littered with burnt hazelnut shells apparently left by the hunter - gatherers and subjected the samples to both radiocarbon dating and ancient DNA analysis.

David Coltman, a wildlife geneticist at the University of Alberta, decided to analyze the fabled hair sample using DNA analysis techniques.

Their study involved live capture of eastern coyotes and eastern coyote × eastern wolf hybrids to deploy Global Positioning System (GPS) radio - collars and take blood samples for DNA analysis.

«Once we'd dealt with the tiny size of the bone samples, the highly degraded state of the DNA, and the lack of any similar genomes to compare to, the analysis was a piece of cake,» said Natural History Museum scientist Dr. Selina Brace.

The newly developed method, which researchers are calling TumorTracer, are based on analyses of DNA mutations in cancer tissue samples from patients with metastasized cancer, i.e. cancer which has spread.

TMWG allows customers to access the power of whole - genome epigenetic information in an integrated, cost - effective solution combining state - of - the art sample preparation and DNA sequence analysis.

Metagenomics poses many analysis challenges, from errors reading DNA sequences to decoding which sequences come from which of the hundreds of microbial species in a microbiome sample.

Using samples of centuries - old herbaria and DNA analysis, the researchers reconstructed the genetic adaptations undergone by the Pyrenean rocket prior to its rapid spread in Belgium.

This can include identifying microscopic amounts of blood, saliva or semen on evidence; carrying out a DNA analysis on any samples found and comparing the resulting profile against the UK's DNA Database; or using microscopy to see if two fibres have similar characteristics.

Molecular analyses of the chest sample in a previous study confirmed the diagnosis of tuberculosis and hinted that TB DNA was extremely well preserved in her body.

The difficulty in measuring such a small increment in chromosome 21 DNA concentration has recently been overcome with the use of massively parallel genomic sequencing.20 This technique can identify and quantify millions of DNA fragments in biological samples in a span of days.23 Three cohort studies have shown the feasibility of using the technique to identify fetuses with trisomy 21 by analysis of maternal plasma DNA.24 25 26 The sample numbers studied were small because, typically, only a few samples could be analysed in each sequencing run.

Critical issues for this goal are the number of fetal cells which can be recovered from a blood sample, the purity of cell recovery, the quality of the recovered fetal cells DNA and the assay workflow allowing to develop a high - throughput analysis generating reliable results at a very affordable price.

Other recent analyses of ancient DNA samples have led to revisions of hypotheses about the peopling of Europe, the Arctic, and Australia.

For their analyses, the researchers obtained the help of the American Kennel Club (AKC) and dog breeders across the country to acquire cheek - swab DNA samples from purebred dogs at dog shows and directly from owners.

While evidence obtained in our and other laboratories strongly suggests that H. pylori triggers a transcriptional response, epigenetic alterations and DNA damage in infected cells, most of the data supporting these findings rest on fragmentary analyses of clinical samples and cells infected in vitro.

DNA analysis of parasites found in rectum tissue samples also support chronic Chagas disease, a condition she probably had since early infancy.

Nine samples from four sites were found to contain sufficient quantities of hominin DNA to merit further analysis, which revealed eight of them contained Neanderthal DNA and the other had DNA from Denisovans — a mysterious group of humans whose existence has only been gleaned from the DNA analysis of a few finger bones and teeth found in a Siberian cave.

After this course you should be able to: - Prepare libraries from genomic DNA for amplicon or whole genome approaches to nanopore sequencing - Run ONT devices and assess sequencing performance during a run - Understand the basics of ONT data handling and analysis - Analyse and interpret ONT amplicon data and whole genomic data from bacterial samples

He also pioneered the development of microfabricated capillary electrophoresis devices and microfabricated integrated sample preparation and detection methods for lab - on - a-chip analysis that are being applied to DNA sequencing, diagnostics, forensics, pathogen detection and space exploration.

Analysis of DNA samples shows that Neanderthals and humans may have interbred 50,000 years earlier than previously thought.

Sequence analysis of DNA samples from 78 patients with CMML / aCML samples identified heterozygous JAK2V617F mutations in 7 samples and a homozygous mutation in 1 sample.