Congress discarded 'Dalit' leader S. Kesri for Sonia: Modi

Washington DC, Jun 8: Astronomers acting on a hunch have likely resolved a mystery about young, still-forming stars and regions rich in organic molecules closely surrounding some of them.

They used the National Science Foundation's Karl G Jansky Very Large Array (VLA) to reveal one such region that previously had eluded detection and that revelation answered a longstanding question.

The regions around the young protostars contain complex organic molecules which can further combine into prebiotic molecules that are the first steps on the road to life.

The regions, dubbed "hot corinos" by astronomers, are typically about the size of our solar system and are much warmer than their surroundings, though still quite cold by terrestrial standards.

The first hot corino was discovered in 2003 and only about a dozen have been found so far. Most of these are in binary systems, with two protostars forming simultaneously.

Astronomers have been puzzled by the fact that, in some of these binary systems, they found evidence for a hot corino around one of the protostars but not the other.

"Since the two stars are forming from the same molecular cloud and at the same time, it seemed strange that one would be surrounded by a dense region of complex organic molecules and the other wouldn't," said Cecilia Ceccarelli, of the Institute for Planetary Sciences and Astrophysics at the University of Grenoble (IPAG) in France.

The complex organic molecules were found by detecting specific radio frequencies, called spectral lines, emitted by the molecules. Those characteristic radio frequencies serve as "fingerprints" to identify the chemicals.

The astronomers noted that all the chemicals found in hot corinos had been found by detecting these "fingerprints" at radio frequencies corresponding to wavelengths of only a few millimetres.

"We know that dust blocks those wavelengths, so we decided to look for evidence of these chemicals at longer wavelengths that can easily pass through dust," said Claire Chandler of the National Radio Astronomy Observatory, and principal investigator on the project.

"It struck us that dust might be what was preventing us from detecting the molecules in one of the twin protostars," added Chandler.

The astronomers used the VLA to observe a pair of protostars called IRAS 4A, in a star-forming region about 1,000 light-years from Earth. They observed the pair at wavelengths of centimetres.

At those wavelengths, they sought radio emissions from methanol, CH3OH (wood alcohol, not for drinking). This was a pair in which one protostar clearly had a hot corino and the other did not, as seen using the much shorter wavelengths.

The result confirmed their hunch. "With the VLA, both protostars showed strong evidence of methanol surrounding them. This means that both protostars have hot corinos. The reason we did not see the one at shorter wavelengths was because of dust," said Marta de Simone, a graduate student at IPAG who led the data analysis for this object.

The astronomers cautioned that while both hot corinos now are known to contain methanol, there still may be some chemical differences between them. That, they said, can be settled by looking for other molecules at wavelengths not obscured by dust.

"This result tells us that using centimetre radio wavelengths is necessary to properly study hot corinos," Claudio Codella of Arcetri Astrophysical Observatory in Florence, Italy, said.

"In the future, planned new telescopes such as the next-generation VLA and SKA, will be very important to understanding these objects," added Codella.

New Delhi, Jul 19: India's Covid-19 case fatality rate is "progressively falling" and is currently at 2.49 per cent, which is one of the lowest in the world, the Union Health Ministry said on Sunday, crediting efficient clinical management of hospitalised cases for it.

There are 29 states and union territories with a case fatality rate (CFR) lower than India's average, with five of them having a CFR of zero and 14 having fatality rate of less than 1 per cent.

The focused efforts of the Centre and state and UT governments on efficient clinical management of hospitalised cases have ensured that India's case fatality rate has fallen below 2.5 per cent, the ministry said.

With effective containment strategy, aggressive testing and standardized clinical management protocols based on holistic standard of care approach, the CFR has significantly dipped, it said.

"The CFR is progressively falling and currently, it is 2.49 per cent. India has one of the lowest fatality rates in the world," the ministry said.

From 2.82 per cent over a month earlier, India's Covid-19 case fatality rate declined to 2.72 per cent on July 10 and has further reduced to 2.49 per cent presently.

Under the guidance of the Centre, the state and UT governments have ramped up testing and hospital infrastructure by combining public and private sector efforts, the ministry said.

Many states have conducted the population surveys to map and identify the vulnerable population like the elderly, pregnant women and those with co-morbidities.

This, with the help of technological solutions like mobile apps, has ensured keeping the high-risk population under continuous observation, thus aiding early identification, timely clinical treatment and reducing fatalities, the ministry said.

"At the ground level, frontline health workers like ASHAs (Accredited Social Health Activists) and ANMs (Auxiliary Nursing Midwives) have done a commendable job of managing the migrant population and to enhance awareness at the community level.

"As a result, there are 29 States and UTs with CFR lower than India's average. This shows commendable work done by public health apparatus of the country," the ministry said.

Manipur, Nagaland, Sikkim, Mizoram, Andaman and Nicobar Islands have zero case fatality rate.

States and UTs having a CFR below the national average include Tripura (0.19 pc),  Assam (0.23 pc), Kerala (0.34 pc), Odisha (0.51 pc), Goa (0.60 pc), Himachal Pradesh (0.75 pc), Bihar (0.83 pc), Telangana (0.93 pc), Andhra Pradesh (1.31 pc), Tamil Nadu (1.45 pc), Chandigarh (1.71 pc), Rajasthan (1.94 pc), Karnataka (2.08 pc) and Uttar Pradesh (2.36 pc).

India saw a record single-day jump of 38,902 Covid-19 cases pushing its tally to 10,77,618 on Sunday, while the total number of recoveries increased to 6,77,422.

A total of 23, 672 patients have recuperated in the past 24 hours, the highest so far in a day, according to the health ministry data updated at 8 AM.

According to the Indian Council of Medical Research (ICMR), a cumulative total of 1,37,91,869 samples have been tested up to July 18 with 3,58,127 samples being tested on Saturday. 

New Delhi, Jul 15: Air India has started the process of identifying employees, based on various factors like efficiency, health and redundancy, who will be sent on compulsory leave without pay (LWP) for up to five years, according to an official order.

The airline's board of directors have authorised its Chairman and Managing Director Rajiv Bansal to send employees on LWP "for six months or for a period of two years extendable upto five years, depending upon the following factors - suitability, efficiency, competence, quality of performance, health of the employee, instance of non-availability of the employee for duty in the past as a result of ill health or otherwise and redundancy", the order said on Tuesday.

The departmental heads in the headquarter as well as regional directors are required to assess each employee "on the above mentioned factors and identify the cases where option of compulsory LWP can be exercised", stated the order dated July 14.

"Names of such employees need to be forwarded to the General Manager (Personnel) in headquarter for obtaining necessary approval of CMD," the order added.

In response to queries regarding this matter, Air India spokesperson said,"We would not like to make any comment on the issue."

Aviation sector has been significantly impacted due to the travel restrictions imposed in India and other countries due to the coronavirus pandemic. All airlines in India have taken cost-cutting measures such as pay cuts, LWP and firings of employees in order to conserve cash flow.

For example, GoAir has put most of its employees on compulsory LWP since April.

India resumed domestic passenger flights from May 25 after a gap of two months due to the coronavirus pandemic.

However, the airlines have been allowed to operate only a maximum of 45 per cent of their pre-COVID domestic flights. Occupancy rate in Indian domestic flights has been around 50-60 per cent since May 25.

Scheduled international passenger flights continue to remain suspended in India since March 23.

The passenger demand for air travel will contract by 49 per cent in 2020 for Indian carriers in comparison to 2019 due to COVID-19 crisis, said global airlines body IATA on Monday.