Water has new molecular properties: Scientists
New York, Aug 14 : US scientists have predicted a fundamental asymmetry in the mechanism of water, which had previously gone unnoticed.
For nearly a century, it was thought that the mechanisms by which water transports the H+ and OH ions were mirror images of each other -- identical in all ways except for directions of the hydrogen bonds involved in the process.
Water consists of one oxygen atom and two hydrogen atoms, but the hydrogen atoms are relatively mobile and can hop from one molecule to another, and it is this hopping that renders the two ionic species so mobile in water.
Prior research had indicated that two main geometrical arrangements of hydrogen bonds (one associated with each ion) facilitate the hops.
But the study found that one of the arrangements led to significantly slower hops for OH than for H+ at four degrees Celsius.
"The new finding is quite surprising and may enable deeper understanding of water's properties as well as its role as a fluid in many of nature's phenomena," said lead author Alexej Jerschow, Professor at the New York University (NYU).
If this asymmetry predicted is correct, it could be exploited in different applications by tailoring a system to favour one ion over the other, the researchers said.
In the study, detailed in the journal Physical Review Letters, the team involved cooling water down to its so-called temperature of maximum density, where the asymmetry is expected to be most strongly manifest, thereby allowing it to be carefully detected.
By cooling water down to this temperature, the team employed nuclear magnetic resonance methods (the same type of approach is medically in magnetic resonance imaging) to show that the difference in lifetimes of the two ions reaches a maximum value (the greater the lifetime, the slower the transport).
By accentuating the difference in lifetimes, the asymmetry became clear.
Let the Truth be known. If you read VB and like VB, please be a VB Supporter and Help us deliver the Truth to one and all.
HC to decide if gram panchayat members can continue in Manipur post tenure: SC
New Delhi (PTI): The Supreme Court on Thursday said the high court would decide whether the elected gram panchayat members, whose five-year tenure was over in Manipur, were entitled to continue in their posts in the event of the appointment of an administrative committee or an administrator.
A bench of Justices Surya Kant and N Kotiswar Singh said it would like to have the benefit of the view of the high court in the matter and set a three-month time frame to adjudicate the legal question.
"The question that falls for consideration in this case is that whether the elected member of the Gram Panchayat whose five-year tenure is over was entitled to continue as members of the gram panchayat in the event of appointment of administrative committee or administrator, as contemplated under Section 22 of the Manipur Panchayati Raj Act of 1994," the bench noted.
The Manipur government’s counsel said the state could not hold panchayat elections due to the unprecedented violence.
"Since, we would like to have the advantage of the opinion of the high court, we dispose of the special leave petition without expressing any opinion on merits, with the request to the chief justice of Manipur High Court to post the main case before a division bench at the earliest. We further request the division bench, before whom the matter is listed, to provide expeditious hearing with an endeavour to resolve the controversy within three months," the bench said.
The bench noted that provision of Manipur Panchayati Raj Act was amended to substitute the word "cease" with the word "continue" with respect to the tenure of the elected members of the gram panchayat.
The petitioners have challenged a high court order and submitted that since elections in gram panchayat could not be held in Manipur for various reasons, the previously elected members of the panchayat were entitled to continue as per the amended Section 22 (3) of 1994 Act.
Section 22 deals with the power of deputy commissioner to appoint an administrative committee or an administrator for a period of six months, which will then oversee the election.
Section 22 (3) of the law says once the administrative committee or an administrator is appointed by the deputy commissioner, the elected members of earlier gram panchayat shall cease to exist.
The top court said what has been challenged before it was an interlocutory order of the high court and the main petition in which the question of law that had been raised was still pending.
The original petitioners before the high court were elected representatives at the fifth general elections for gram panchayats and the zilla parishads who sought a direction to continue in the office beyond the period of five years as stipulated by law as elections were last held in 2017.
They sought to continue as panchayat members till the time the state election commission notified the election for the sixth general elections for gram panchayats and zilla parishads.
On February 29, last year, the high court in its interim order gave liberty to Manipur government to appoint an administrative committee for each gram panchayat and zilla parishad in accordance with law and the provision of the Act.
