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World Food Program appeals for $19 million to provide emergency food for Afghanistan_我的网站

一 |     ISLAMABAD -- The United Nations' World Food Program on Wednesday appealed for $19 million to provide emergency assistance to tens of thousands of people affected by a series of devastating earthquakes and aftershocks that has rocked western Afghanistan.Ana Maria Salhuana, deputy country director of the World Food Program in Afghanistan, said it was helping survivors but it urgently needed more funding because “we are having to take this food from an already severely underfunded program.”The group said it is working to provide emergency food assistance to 100,000 people in the region.“Disasters like these earthquakes pound communities who are already barely able to feed themselves back into utter destitution," the WFP said.A 6.3 magnitude earthquake struck part of western Afghanistan on Sunday, after thousands of people died and entire villages were flattened by major quakes a week earlier. It was the fourth quake the U.S. Geological Survey has measured at 6.3 magnitude in the same area in just over a week.The initial earthquakes on Oct. 7 flattened whole villages in Herat province and were among the most destructive quakes in the country’s recent history.The WFP said staffers responded within hours of the first earthquakes, distributing fortified biscuits, pulses and other food items to affected families in destroyed villages.“An estimated 25,000 buildings have been destroyed," the group said a statement. “The survivors are currently sleeping in tents next to the rubble of their homes, desperate and afraid of further earthquakes and aftershocks.”The latest quake was centered about 30 kilometers (19 miles) outside the city of Herat, the capital of Herat province, and was 6 kilometers (4 miles) below the surface, the U.S. Geological Survey said. More than 90% of the people killed were women and children, U.N. officials said. The quakes struck during the daytime, when many of the men in the region were working outdoors.Taliban officials said the earlier quakes killed more than 2,000 people across the province. The epicenter was in Zenda Jan district, where the majority of casualties and damage occurred.The WFP said affected families will need help for months with winter just weeks away. It said that if there is funding, the emergency response will be complemented by longer-term resilience programs so vulnerable communities are able to rebuild their livelihoods.The UN body was forced earlier this year to reduce the amount of food families receive and to cut 10 million people in Afghanistan from life-saving food assistance due to a massive funding shortfall. In addition to the earthquake response, the WFP also urgently needs $400 million to prepare food before winter, when communities are cut off due to snow and landslides. In Afghanistan, these include communities of women who are being increasingly pushed out of public life.The initial quake, numerous aftershocks and a third 6.3-magnitude quake on Wednesday flattened villages, destroying hundreds of mud-brick homes that could not withstand such force. Schools, health clinics and other village facilities also collapsed.Besides rubble and funerals after that devastation, there was little left of the villages in the region’s dusty hills. Survivors are struggling to come to terms with the loss of multiple family members and in many places, living residents are outnumbered by volunteers who came to search the debris and dig mass graves.Earthquakes are common in Afghanistan, where there are a number of fault lines and frequent movement among three nearby tectonic plates.。    Mosquitoes use the body odor, heat, and carbon dioxide that humans emit, varying from person to person, to find their next meal. The study, which was published in the scientific journal Cell, reveals that mosquitoes may perceive odors via a variety of distinct pathways, in contrast to animals, which have a single set of neurons that detect each sort of odor.,Female mosquitoes use the variety of odors that people and other animals produce to find the blood that will feed their eggs. The olfactory neurons in the insects' antennae, which are where they take up scents, detect and send scent information to the brain.,Groups of human-odor receptors on the olfactory neurons in the antennae of female mosquitoes (Aedes aegypti) were rendered inactive by the study's lead author Meg Younger and her colleagues at Boston University in Massachusetts using the gene editing tool CRISPR.,"We found that there’s a real difference in the way mosquitoes encode the odors that they encounter compared to what we’ve learned from other animals,” Younger is quoted as saying in the Guardian report on the findings.,According to Younger, the scientists believed that mosquitoes would adhere to the core tenet of olfaction, which states that each neuron expresses only one type of receptor.,“Instead, what we’ve seen is that different receptors can respond to different odors in the same neuron," she added.,This reportedly suggests that mosquitoes can still detect human odors after losing one or more receptors. The researchers asserted that this backup system may have developed as a survival mechanism.,"The mosquito Aedes aegypti is specialized to bite humans, and it is believed that they evolved to do that because humans are always close to fresh water and mosquitoes lay their eggs in fresh water. We are basically the perfect meal, so the drive to find humans is extremely strong," Younger explained,In the end, the researchers argued, knowing how the mosquito brain perceives human odor could be used to influence biting behavior and stop the spread of diseases like malaria, dengue fever, and yellow fever that are transmitted by those insects.,"One major strategy for controlling mosquitoes is to attract them to traps to remove them from the biting population. If we could use this knowledge to understand how human odor is represented in the mosquito antennae and brain, we could develop blends that are more attractive to mosquitoes than we are. We could also develop repellants that target those receptors and neurons that detect human odor," Younger concluded.,Notably, Christopher Potter at Johns Hopkins School of Medicine in Maryland recently found a similar phenomenon in fruit flies, or Drosophila melanogaster.,“If one of these types of olfactory receptors is mutated or no longer functioning, there’s this backup system," Potter is quoted as saying in the New Scientist report. “It’s changing the dogma of what we thought we knew about the olfactory system.”,Science & TechSmell of Blood: Mosquitoes' Scent-Based Host-Seeking Mechanism Revealed16 May, 05:54 GMT。

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