Showing posts with label origin. Show all posts
Horizontal Gene Transfer in Humans
"Many animals, including humans, acquired essential ‘foreign’ genes from microorganisms co-habiting their environment in ancient times"
Horizontal gene transfer is a process whereby organisms living within the same environment pass genes between one another. In contrast, conventional evolutionary genetics dictate that genes are passed on vertically down ancestral lines.
In single cell led organisms, this is a well known mechanism and thought to be the process whereby bacterial rapidly acquire antibiotic resistance. However, in a world first led by Alastair Crisp from the Department of Chemical Engineering and Biotechnology, University of Cambridge - a comparative study examined HGT in animals and humans, whereby 144 foreign genes were identified ie: human genes not from our ancestors
The study involved
Reference :
1: http://www.cam.ac.uk/research/news/human-genome-includes-foreign-genes-not-from-our-ancestors
Horizontal gene transfer is a process whereby organisms living within the same environment pass genes between one another. In contrast, conventional evolutionary genetics dictate that genes are passed on vertically down ancestral lines.
In single cell led organisms, this is a well known mechanism and thought to be the process whereby bacterial rapidly acquire antibiotic resistance. However, in a world first led by Alastair Crisp from the Department of Chemical Engineering and Biotechnology, University of Cambridge - a comparative study examined HGT in animals and humans, whereby 144 foreign genes were identified ie: human genes not from our ancestors
The study involved
Reference :
1: http://www.cam.ac.uk/research/news/human-genome-includes-foreign-genes-not-from-our-ancestors
CERES
Update ** July 21-25 2015
Scattered light, described as a haze or bugs smeared on a windscreen effect were described to emanate out of the reflected bright spots in Spot 5, that are not visible when out of direct communication in the Sun.
On a dwarf planet with an almost non existent magnetic field in vacuum..and an anomaloy that seems to contain a mini atmosphere..it suggests, containment within a bubble or dome?
"If you look at a glancing angle, you can see what seems to be haze, and it comes back in a regular pattern," Dawn principal investigator Christopher Russell, of UCLA, said during a presentation Tuesday (July 21) at the second annual NASA Exploration Science Forum
subsequently, it appears that Russell is cautioned, and a new statement is issued
“I was speaking from less than a handful of images, and the interpretation of the images is disputed by some team members. I would like the debate to go on internally before we make a pronouncement one way or the other. I of course have my personal opinion, but I am not always right.”
Optical NanoResonator
Interestingly, a new research article has just been released around the same time, with regards to a light amplification process that can resonate light 10 000 x more with a minuscule absorption
An advanced highly efficient solar cell such as that from UMW involving a optical nanoresonator could realize extreme concentration of light at subwavelength nanoscale dimensions
Ceres was discovered in 1801, a massive body the size of Texas travelling between Mars and Jupiter, and is the only dwarf planet (between the a Sun and Neptune). It is perfectly round in shape, suggesting formation early within the solar system with a low density.
Exploration of Ceres, can hold the key to water within the middle solar system compared to other icy bodies. Currently it is being surveyed by the DAWN spacecraft undergoing it's 3rd lower orbital survey, following a glitch* during descent to lower orbit (July 2015)
Ceres geology features include
- Haze at Occator Crater (not jet or plume)
- There are at least 5 bright spot locations
- Bright spots: some appear to be depressions rather than craters (seen below)
- Spot5: Mysterious complex of bright spots at Occator Crater
- Distribution of bright spots appeared not consistent with impact
- 3 mile high conical structure (within a relatively smooth surrounding
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| Animation of 51 plates of Ceres |
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| Additional view of Spot 5 complex of bright spots |
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| Furrows leading up to the conical mound |
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| RC3 view of the conical mound |
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| Bright spot - appears to be a depression rather than a crater |
DAWN spacecraft
Dawn was launched in 2007 and will undergo 4 mapping orbits around ceres, and is powered by a ion engine
Dawn will conduct its studies from three lower orbital altitudes after RC3, taking advantage of the tremendous maneuverability provided by ion propulsion to spiral from one to another. We presented previews last year of each phase, and as each approaches, we will give still more up-to-date details, but now that Dawn is in orbit, let’s summarize them here. Of course, with complicated operations in the forbidding depths of space, there are always possibilities for changes, especially in the schedule. The team has developed an intricate but robust and flexible plan to extract as many secrets from Ceres as possible, and they will take any changes in stride.
Each orbit is designed to provide a better view than the one before, and Dawn will map the orb thoroughly while at each altitude. The names for the orbits – rotation characterization 3 (RC3); survey; high altitude mapping orbit (HAMO); and low altitude mapping orbit (LAMO) – are based on ancient ideas, and the origins are (or should be) lost in the mists of time. Readers should avoid trying to infer anything at all meaningful in the designations. After some careful consideration, your correspondent chose to use the same names the Dawn team uses rather than create more helpful descriptors for the purposes of these blogs. That ensures consistency with other Dawn project communications. After all, what is important is not what the different orbits are called but rather what amazing new discoveries each one enables
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| PIA 19562 |
IMPACT BASIN
Source: PIA19065
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| NASA Photojournal version |
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| Reprocessing from original PIA19065 and turned 180 degrees and...you see domes instead of craters |
Southern Hemisphere
Comparative Collage of Dwarfs and moons
Ceres (Rc3), Vesta, Mimas, Miranda, Enceladus, the Mars moons and Chariklo
Author: Daniele Bianchino, Italy
67P/Churyumov-Gerasimenko
FROZEN PRIMORDIAL SOUP
**Update: 30th July 2000 BST**"One of the big questions, though, is this material made on the comet? Or is it made first in space and then incorporated into the comet? We don't know the answer to that yet."
Results from the lander's seven instruments are published in a special collection of papers in the journal Science.
67P Composition
Born from the detritus of the primordial solar system more than 4.5 billion years ago, the icy comet has a fluffy coating over a hard-grained surface pocked with gas-spewing sinkholes
Electromagnetic signals fired through the centre of the comet showed the object had a uniform structure that was highly porous. The interior is 75% empty space
PHILAE INSTRUMENTS
67P Composition
Born from the detritus of the primordial solar system more than 4.5 billion years ago, the icy comet has a fluffy coating over a hard-grained surface pocked with gas-spewing sinkholes
Electromagnetic signals fired through the centre of the comet showed the object had a uniform structure that was highly porous. The interior is 75% empty space
PHILAE INSTRUMENTS
One team running a device called COSAC found no fewer than 16 organic compounds, four of which had not been known to exist on comets before
- Hydroxyethanal is "an efficient initiator in the prebiotic formation of sugars", they write.
- Methanenitrile is "a key molecule in the prebiotic synthesis of amino acids and nucleobases and even offers an elegant pathway to sugars".
- PTOLEMY discovered a simple polymer of formaldehyde (in the same ratio of carbohydrates to sugars found on Earth
Ancestral material
Prof Ian Wright of the Open University, who leads another instrument, Ptolemy, said the results were "really interesting".
It indicated the presence of a polyoxymethylene (POM), an organic polymer, or chained compound, on the comet surface.
POM has been suggested as playing a key role in prebiotic chemistry. But so far Philae has produced no evidence of amino acids, which chain together to form proteins, the building blocks of life.
"I see this cometary material that we're analysing as frozen primordial soup. It's the kind of stuff that if you had it, and warmed it up somehow, and put it in the right environment, with the right conditions, you may eventually get life forming out of it.
"What we may be looking at here is our abiological ancestral material - this is stuff that went into the mix to produce life.
"In many ways it's quite a humbling thing to be working on, because this is life before life happened."
PTOLEMY - instrument discovered polyoxymethylene, a string of relatively simple molecules forming a polymer of formaldehyde: (C-2H-O) repeated. "That same ratio of elements occur in carbohydrates and sugars so it's very interesting and implicated in the biological cycle we have on Earth."
PHILAES FATE
Newly published data show that Philae came to rest with three feet pointing up in partial shadow where it was unable to keep itself warm or generate sufficient electricity from its solar panels. Just three days after landing it shut down.
Although the probe began communicating again on June 24 it has been silent since July 9 and scientists now fear it will never make contact again.
"The landing site is dominated by metre-scale blocks, with a large elongated cliff, starting around one metre away. These large structures are responsible for Philae being partially shadowed, drastically limiting its energy intake for both warming up the internal compartment and supplying the solar panels."
However the final touchdown site was much harder than the original surface which meant that a hammer and drill on board Philae could not penetrate ground and gather samples as planned.
The image team, led by Dr Jean-Pierre Bibring, from the Universite Paris-Sud in France, described how Philae seemed to be "in a hole about its own size, partially shadowed by nearby boulders or cliffs".
One foot was probably stuck in a "local cavity", another rested on a sun-lit surface, and the third was "pointing upward".
SOURCE:
Comet 67P/Churyumov-Gerasimenko
67P/Churyumov-Gerasimenko is unusual.
The images alone suggest its no normal asteroid. But before we get into all that, let us journey across the timeline of 67P. Comet 67P has two distinct lobes, attached by a thinner neck. The larger of the two lobes, the body, and the smaller lobe, known as the head, give the comet a look similar to a plastic rubber duck. It appears as though this double-lobed shape is common among comets.
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* The comet has a black hydrocarbon crust overlaying ice, smooth icy “seas” and flat-bottomed craters containing lakes of re-frozen water overlain with organic debris.
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The Ambition
- 67P water vapour is different (from other planets and earth)
- origin of life has been strongly hinted at
- organic rich black crust (beneath ice) suggests alien microbial life forms*
- orbiting Rosetta spacecraft is said to have picked up "strange clusters of organic material that resemble viral particles"
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* The comet has a black hydrocarbon crust overlaying ice, smooth icy “seas” and flat-bottomed craters containing lakes of re-frozen water overlain with organic debris.
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The Ambition
Prior to landing on 67P, this promotional film was released by ESA. And therein, lies a scripted tale, easter eggs and an ambition (for humanity) by no other than Aidan Gillen "littlefinger" of HBO Game of Thrones fame. Date 24th Oct 2014
Update: July 19 2015
67P is divided into 19 parts and named after Egyptian gods following the use of the Rosetta stone of the Rosetta spacecraft.
"Just as the Rosetta Stone provided the key to an ancient [civilization], so ESA's Rosetta spacecraft will unlock the mysteries of the oldest building blocks of our Solar System — the comets"
"We picked Hapi for the neck since Hapi is the Nile god, and we figured that he should separate the lobes in the same way that the Nile splits Egypt into an eastern and western side,"
Regions on the body lobe of the comet are named after Egyptian gods, and regions on the head are named after goddesses, according to El-Maarry. So far there are 19 regions, which fall into five categories: dust-covered regions (Ma'at, Ash and Babi); one region covered in pits and circular structures that are underlain with brittle materials (Seth); regions with big depressions (Hatmehit, Nut and Aten); smoother regions (Hapi, Imhotep and Anubis); and those with rocklike surfaces (Maftet, Bastet, Serqet, Hathor, Anuket, Khepry, Aker, Atum and Apis).
The region names are mostly those of lesser-known Egyptian gods and goddesses, which El-Maarry said was intentional because many of the more popular deity names have already been used by other space missions.
Source: Gods among the stars
Rosetta 3D view of 67P
Origin - Ancient Star Map: Kitora Tomb, Asuka circa 65BC
Ancient star chart from Kitora Tomb, Asuka 65BC, depicting sky from seen from China, from locations such as modern-day Xi'an and Luoyang with recognisable star patterns
Source: http://www.asuka-park.go.jp/kitora/
Note: The star map shows clear celestial patterns not seen in older star maps eg. 17,000 year old Lascaux cave paintings show
Pleiades, Taurus, Orion and AldebaranNote: The star map shows clear celestial patterns not seen in older star maps eg. 17,000 year old Lascaux cave paintings show
It has designations for the horizon, equator and ecliptic circles, as well as recognisable patterns of stars.
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