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originally posted by: Phantom423
a reply to: cooperton
You are such a liar. That paper is a quality control experiment:
You're such a fraud. I don't know how you live with yourself.
3D Maps of Mineral Composition and Hydroxyapatite Orientation in Fossil Bone Samples Obtained by X-ray Diffraction Computed Tomography
Fredrik K. Mürer, Sophie Sanchez, Michelle Álvarez-Murga, Marco Di Michiel, Franz Pfeiffer, Martin Bech & Dag W. Breiby
Scientific Reports volume 8, Article number: 10052 (2018) Cite this article
Abstract
Whether hydroxyapatite (HA) orientation in fossilised bone samples can be non-destructively retrieved and used to determine the arrangement of the bone matrix and the location of muscle attachments (entheses), is a question of high relevance to palaeontology, as it facilitates a detailed understanding of the (micro-)anatomy of extinct species with no damage to the precious fossil specimens. Here, we report studies of two fossil bone samples, specifically the tibia of a 300-million-year-old tetrapod, Discosauriscus austriacus, and the humerus of a 370-million-year-old lobe-finned fish, Eusthenopteron foordi, using XRD-CT – a combination of X-ray diffraction (XRD) and computed tomography (CT). Reconstructed 3D images showing the spatial mineral distributions and the local orientation of HA were obtained. For Discosauriscus austriacus, details of the muscle attachments could be discerned. For Eusthenopteron foordi, the gross details of the preferred orientation of HA were deduced using three tomographic datasets obtained with orthogonally oriented rotation axes. For both samples, the HA in the bone matrix exhibited preferred orientation, with the unit cell c-axis of the HA crystallites tending to be parallel with the bone surface. In summary, we have demonstrated that XRD-CT combined with an intuitive reconstruction procedure is becoming a powerful tool for studying palaeontological samples.
RESEARCH ARTICLE| FEBRUARY 01 2020
Radiocarbon in Dinosaur Fossils: Compatibility with an Age of Millions of Years
Philip J. Senter
The American Biology Teacher (2020) 82 (2): 72–79.
doi.org...
The recent discovery of radiocarbon in dinosaur bones at first seems incompatible with an age of millions of years, due to the short half-life of radiocarbon. However, evidence from isotopes other than radiocarbon shows that dinosaur fossils are indeed millions of years old. Fossil bone incorporates new radiocarbon by means of recrystallization and, in some cases, bacterial activity and uranium decay. Because of this, bone mineral – fossil or otherwise – is a material that cannot yield an accurate radiocarbon date except under extraordinary circumstances. Mesozoic bone consistently yields a falsely young radiocarbon “date” of a few thousand to a few tens of thousands of years, despite the fact that it is millions of years old. Science educators need to be aware of the details of these phenomena, to be able to advise students whose acceptance of biological evolution has been challenged by young-Earth creationist arguments that are based on radiocarbon in dinosaur fossils.
Radiocarbon
Radiocarbon Dating & Confounding Factors
Most science textbooks explain radiocarbon dating in no further detail than that (e.g., Campbell et al., 2009; Bergstrom & Dugatkin, 2016; Urry et al., 2017), because their goal is to provide only a general overview of it. However, the reality of radiocarbon dating is more complicated. There are several factors that can add 14C to samples so that they yield falsely young ages (e.g., nuclear fallout, bacterial contamination, and contamination with coal), and there are other factors that add 14C-depleted carbon to samples so that they yield falsely old ages (e.g., volcanic gases, industrial emissions, and the reservoir effect) (Table 1). However, corrective calibration techniques and other procedures can correct for all these confounding factors (Pasquier-Cardin et al., 1999; Goslar et al., 2000; Nadeau et al., 2001; McGee et al., 2004; Mihara et al., 2004; Quarta et al., 2007; Nakanishi et al., 2015; Tankersley et al., 2017; Wang et al., 2017; Yang et al., 2017). Once corrective calibrations and other corrective procedures are implemented, radiocarbon measurements yield correct dates, as has been demonstrated with radiocarbon dating of samples of known ages (e.g., Jull et al., 2018). However, as explained below, bone mineral is an exception to the rule, and there are no corrective measures that can get fossil bone mineral to generate a correct radiocarbon date.
originally posted by: Phantom423
The paper he cited was essentially a calibration protocol to make sure the instruments were calibrated to the known standards. Has absolutely nothing to do with dinosaur bones.
As you know, dinosaur fossils are primarily hydroxyapatite.
I go to bed happy every night knowing that my ancestors were not mutant pond goo spawn.
originally posted by: Phantom423
You still have not cited a research paper or biology textbook that describes evolution per your description. The best you can come up with is "It". So much for evidence of your crackpot "science". You're about as reliable as a rattlesnake in heat.
originally posted by: Phantom423
online.ucpress.edu...
originally posted by: whereislogic
originally posted by: dragonridr
a reply to: whereislogic
Well given enough time anything is possible.
No, just no. An utterly baseless statement. There is no evidence to support this fantasy. However, there is lots of evidence that refutes said claim. It's usually used as some agnostic mantra, the proponents of this notion don't even bother to provide evidence supporting this view other than some lame philosophical argumentation and utter nonsense or sophisticated nonsense (as in well hidden that it is nonsensical by means of sophisticated language and elaborately constructed arguments to distract from the real issues with their reasoning and to confuse the listener). Common sense should tell a person that not just "anything is possible", no matter how much time you give it to happen (which you are limited with anyway, the universe is only so old; please spare me the fantasies and baseless speculation about pre-existing universes or the multiverse).
Nucleotides were easy enough to make on the early earth,
Nope. Not easy at all. And...:
Shapiro says that “no nucleotides of any kind have been reported as products of spark-discharge experiments or in studies of meteorites.”(3) He further states that the probability of a self-replicating RNA molecule randomly assembling from a pool of chemical building blocks “is so vanishingly small that its happening even once anywhere in the visible universe would count as a piece of exceptional good luck.”(4)
Source: How Did Life Begin? (The Origin of Life—Five Questions Worth Asking)
Now, a team led by Nicholas V. Hud of Georgia Institute of Technology has identified nitrogen-containing heterocycles that spontaneously react with the sugar ribose-5-phosphate in water to form nucleotides (Nat. Commun. 2016, DOI: 10.1038/ncomms11328).
These nucleotides are capable of forming hydrogen-bonded base pairs similar to the Watson-Crick base pairs formed by modern nucleic acids. Furthermore, the newly created building blocks can self-assemble into large, stacked, noncovalent complexes, which could eventually facilitate the formation of RNA-like molecules.
Hud’s team made the nucleotides with the heterocycles barbituric acid and melamine, both of which have been observed in model prebiotic reactions in the past. Both of them reacted spontaneously with ribose with yields greater than 50%. The bases in modern nucleic acids don’t combine with ribose under the same conditions.
“We think we can consider these bases to be very plausibly prebiotic,” Hud says. “They’re doing things that look like they could get us on the road to making an RNA-like molecule.” Such a molecule could have later evolved to incorporate the bases now found in RNA, he contends.
originally posted by: Phantom423
You have no credibility. Write the authors a letter.
originally posted by: AlienView
See, I only have two simple, and yet basic problems. If one cell [the first cell] formed by an accidental combination of the orginal chemical stew in the beginning and even if the agency of life started accidentally - What made that cell, or others like it split, breed, or reproduce itself - I can not imagine such an accidental event - It had to be by design !
originally posted by: Phantom423
a reply to: cooperton
Wrong. Soft tissue is derived from DEMINERALIZED bone structures. The dating of the dinosaur remains the same.
No they even found a fragment of a red blood cell. That is not demineralized bone. Dinosaurs are not millions of years old
No they even found a fragment of a red blood cell. That is not demineralized bone. Dinosaurs are not millions of years old
Patterns of soft tissue and cellular preservation in relation to fossil bone tissue structure and overburden depth at the Standing Rock Hadrosaur Site, Maastrichtian Hell Creek Formation, South Dakota, USA
•
Demineralization of Edmontosaurus bones released osteocytes and soft tissues.
•
First recovery of soft tissue and cellular components from fossil ossified tendons.
•
Overburden depth at discovery did not influence soft tissue or cellular recovery.
•
Cellular and soft tissue recovery was not correlated with bone tissue structure.
Abstract
Recovery of soft tissues and cells from fossil bones is becoming increasingly common, with structures morphologically consistent with vertebrate osteocytes, blood vessels, fibrous/collagenous matrix, and potential intravascular contents now recognized from specimens dating back to the Permian. However, it largely remains unclear how bone tissue structure, early diagenetic regimes, and many other taphonomic variables influence or control the preservation potential of soft tissues in vertebrate fossils. To explore the influence of a few of these factors, we tested a suite of fossils from the Standing Rock Hadrosaur Site, a vast Edmontosaurus annectens bonebed in the Maastrichtian Hell Creek Formation of South Dakota, for preservation of cellular and tissue components.Demineralization of bone samples from each specimen yielded abundant microstructures morphologically consistent with vertebrate osteocytes, blood vessels, and collagenous matrix. This includes the first recovery of osteocytes and vessels from a fossil vertebral centrum and ossified tendons. Perhaps surprisingly, no correlation was found between soft tissue/cellular recovery and either bone tissue structure type (cortical vs. cancellous) or overburden depth at the time of discovery. A traditional taphonomic survey of the site, conducted in parallel and reported previously, affords a clear and detailed history of these remains, both pre- and postburial. Cumulative taphonomic evidence indicates the Edmontosaurus individuals died in a mass mortality event and their disarticulated remains were buried rapidly in a shallow floodplain pond during a crevasse splay event. Oxygenated flood waters and/or groundwater oxidized initially sideritic concretions to goethite during early diagenesis, facilitating rapid cementation of portions of the sediment that likely aided stabilization of soft tissues by shielding regions of the bones from prolonged exposure to pore fluids. Our findings support cancellous bone as a viable target for cellular analyses, corroborate previous propositions that iron-rich environments and rapid burial facilitate soft tissue preservation, and provide new details into early diagenetic environments conducive to such preservation.
originally posted by: dragonridr
a reply to: cooperton
Do you ever get tired of being wrong? They did not find red blood cells they found was glucose or lipid molecules.
originally posted by: cooperton
originally posted by: Phantom423
The paper he cited was essentially a calibration protocol to make sure the instruments were calibrated to the known standards. Has absolutely nothing to do with dinosaur bones.
I never said it had anything to do with dinosaur bones. In your blind rage you have built many strawmen. Again, it was the paper that the lab tech sent me regarding their pre-treatment protocol to ensure shellac contamination would not be a problem.
As you know, dinosaur fossils are primarily hydroxyapatite.
Dont forget the soft tissue. Dinosaur bones have soft tissue which proves they are not millions of years old
Schweitzer did the opposite of what most paleontologists do with their specimens. Instead of preserving and protecting it, she destroyed it by soaking it in a weak acid. If the entire fossil had been made of rock, it would have dissolved completely. But in the terms used in Schweitzer's paper -- co-authored by Jennifer L. Whittmeyer, John R. Horner and Jan K. Toporski -- the acid demineralized the specimen. After seven days, the demineralization process revealed several unexpected tissues, including:
Blood vessels
Bone matrix
Small objects that appeared to be osteocytes, the cells that build bone
Just like the blood vessels in your body, the ones Schweitzer discovered in the fossil were hollow, flexible and branched. They were also transparent and full of "small round microstructures" [source: Schweitzer, 3/25/2005]. These microstructures visually resembled red blood cells, but their precise nature is still unclear. The tissue Schweitzer found was fibrous, stretchy and resilient --after being stretched, it returned to its normal shape.