19 Sep Current Affairs For CDS/NDA/AFCAT Science And Technology Part 1
Current Affairs For CDS/NDA/AFCAT Science And Technology Part 1
SCIENCE & TECHNOLOGY
RLV-TD: – India for the first time has launched its very own fully Indian made “space-shuttle”- Reusable Launch Vehicle – Technology Demonstration
The RLV_TD is a rocket aircraft combination measuring 17m, whose first stage is a solid propellant booster rocket and the second stage is a 6.5 Long aircraft like winged structure sitting atop the rocket.
The first stage, weighing about 9 tones is merely the satellite launch vehicle (SLV). After 70 km of lift off the booster is released.
Achievements:- gliding back from a height of 70 km from speeds ranging from MACH 0 to MACH 25
Maneuvered landing on virtual in the Bay of Bengal
Testing of heat restraint material on the RLV
GOAL of RLV:- its goal is to put satellite into both the polar and geostationary orbits around the earth and return safe for another mission. It should help the ISRO with launch cost by a length.
BEAM (The Bigelow Expandable Actuary Module)
This is created entirely by a private company. The module is made up of cloth unlike other parts of the ISS (International space station) which is made of space going aluminum.
Advantages of Inflatable’s:-
Mass: – an inflatable module is much lighter than metal compound. Hence this will consume less fuel
Space:- they occupy very little space and can be folded
Radiation:- the module fabric walls made of tough layers of entotic mallard such as VECTRAN, ought to off aeronauts better protection from hazards, better against radiations than metal ones.
MOLYBDENUM DISULPHIDE- is the magic material used for making thinnest lenses also for making rolled up computer and TV screens.
NEW ELEMENTS NAMED:- The (IUPAC) international union of Pure and applied chemistry has announced the following names:-
NEW Semi –Conducting Material:-
A new kind of 2D-Semi conducting material for electronic has been discovered
It opens to much faster super computers and smart phones that consume less power
The semi-conductor made of tin and oxygen or tin monoxide (SnO) is a layer of 2D material only one atom thick, allowing electrical charges to move through it much faster than conventional 3D materials such as SILICON.
Helium Microscope:– Scanning helium Microscope (SneM) a new device built by Australian Researchers would enable scientist to study human, animal and plants samples, as well as computer chips and pharmaceutical drugs at microscopic level, without damaging are hanging them.
It means the samples would be analyzed in their true state for the first time ever.
But why Helium? This is because of 2 reasons.
They are of very low energy.
He Atoms are not electrically charged.
He’s full electron shall means it is inert
It may help find ways of removing carbon monoxide from exhaust gases.
It would also help with the cleanup of toxic or even radioactive spells without harming the surrounding flora or fauna
Copper – titanium Alloy ( cu- Ti):– DRDO has produced its first ever cu- ti alloy technology for commercial exploration to a startup company.
Cu-Ti alloy has been used to make hand tools which are heat & spark free
It has replaced Cu- Be alloys
(Copper beryllium alloys) as beryllium is toxic and causes fatal human diseases called chronic beryllium diseases.
NEW STATE OF WATER:- A new tunneling state of water molecule confirmed is hexagonal ultra small channels- 5 angstrom across of the mineral bergs, which is unmatched by any known gas, liquid or solid state.
An angstrom is 110-bilionth of a meter, and undivided atoms are typically about one angstrom in atom
SYN 3.0 :- Tinniest life form yet :-
Scientist have engineered a living microbe with a genome smaller than any seen in nature, a breakthrough development in synthetic biology.
The original bacteria species that the group worked or is : M my coides which is found in cow stomachs , which has 985 gens
The new organism was nicknamed by researcher as Syn 3.0 has 473 gens
CRISPR- Cas Gene Editing
Llustured Regularity Inter-Spaced Shout palmdorim Repeats abbreviated CRISPR’S is an elaborate arrangement of DNA, which has repeating set of DNA sequences. And each such repetition is followed by a short segment of “SPACER” DNA sequence.
Attached to the CRISPR sequence is also set of genes those codes for enzymes that can cut the spacer DNA sequence. These are referred to as a CRIPSR- associated Sequence.
CRISPR technology allows medical scientific to change DNA, the stuff of life, greater precision than before. DNA CAN EVEN BE REPAIRED OR TAKEN OUT, USING THIS TECHNOLGY.
With this technology comes the promise of treating even- eliminating hereditary diseases. It also means a mistake might be transferred in future generations
Although gene editing is not a new concept and CRISPR- Cas 9 is not the first technology for gene editing, these were other gene editing methods such as Zinc finger nucleases (ZFNS) and transcription activator like effectors nucleases (TALEN’S)
Replacement for SAMBA rice: – Tamil Nadu Rice Research Institute (TRRI), invented a new rice verity AD 09367 which is cross between BPT 5204- a medium duration fine grain, released by AP research station.
Features of AD 09367:-
Medium slender gram
A 155-160 day crop and non lodging
Has yield advantage of 10% over the 2 decades old SAMBA variety
High tolerance to major pests and diseases