Kolkata: The Jibanananda Setu in Jadavpur, popularly known as Selimpur Bridge, is likely to be closed for traffic movement from August 16 to 18 with Kolkata Metropolitan Development Authority (KMDA) deciding to conduct structural health audit of the bridge.As per discussions with the Traffic department of Kolkata Police, KMDA has proposed to keep this bridge closed for vehicular movement from 6 pm on August 16 to 6 pm on August 18. “We are yet to take any final decision on traffic restrictions on the bridge. We are examining the proposal of the KMC. If there is any restriction we will come up with a notification in due course,” said Pandey Santosh, deputy commissioner of police (Traffic), Kolkata. Also Read – Rs 13,000 crore investment to provide 2 lakh jobs: MamataIt has been learnt that the traffic wing is examining the alternative route that may be adopted for vehicular movement along the stretch. Vehicles travelling from the added areas of the city and Behala take the Prince Anwar Shah Road and from the Jadavpur Police station crossing, take the Jibananda Bridge to reach Eastern Metropolitan Bypass at the Avisikta crossing. The bridge is located on the railway tracks midway between Dhakuria and Jadavpur stations. Also Read – Lightning kills 8, injures 16 in stateThe decision has already been taken to keep Sealdah flyover closed for traffic movement for 72 hours from the evening of August 15 till the evening of August 18. It may be mentioned that heavy vehicles have already been barred from plying on two busy flyovers of the city ~ Chingrighata Flyover and Kalighat Bridge ~ after a health study by the KMDA identified “weaknesses” in them. Two other flyovers, namely Aurobindo Setu and Bijon Setu, will also undergo “load capacity test” in the end of August or the beginning of September, during which they would be closed for traffic movement.
Watch a rigged game of tug-of-war inside the egg cells of mammals By Roni DenglerNov. 6, 2017 , 12:10 PM There’s a tug-of-war going on inside reproductive cells. When females make an egg, they can only donate half of each of their chromosome pairs (the other half comes from dad). But how does the cell choose which one? Using fluorescently tagged proteins to watch cell division in mouse egg cells, researchers have discovered that repetitive sequences of DNA near the center of chromosomes—known as centromeres—can either be “strong” or “weak,” they report in Science. Strong centromeres have more places for the so-called spindle fibers that pull chromosome copies apart in cell division to attach, but they don’t operate by brute force. Instead, strong centromeres get what they want by cheating: If their chromosome is oriented in such a way that it’s likely to get discarded rather than reach the egg, the strong centromere lets go of its spindle fibers, causing its counterpart centromere to release its hold, too, and the game starts over. This way the strong centromere can re-orient itself toward the side that will become the egg. So what makes some centromeres stronger than others? Researchers say stronger centromeres are “bigger”—they repeat the same DNA sequence many more times than weak centromeres might—and they are more sensitive to which direction the spindle fibers are pulling them. That makes them more likely to let go when things aren’t going their way, and thus rig the tug-of-war.