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#zinc

2 posts2 participants0 posts today
Public
Alexander J. Stein

#Malawi: Consumption of whole #maize flour could boost #foodsecurity. Dehulling causes losses of 10% for #protein, 60% for #zinc & 50% for iron. Local preferences are for refined #flour due to convenience & cultural norms, despite the #nutrition benefits of whole grain flour: doi.org/10.1007/s44187-025-003

SpringerLinkWhole maize flour could enhance food and nutrition security in Malawi - Discover FoodMaize is the staple cereal in Malawi, with a daily per capita consumption of 383 g (dry matter basis), primarily consumed in the form of nsima, a thick porridge. We combined a milling experiment with focus group discussions (FGDs) to provide insights into mass and nutrient losses during maize grain dehulling and maize flour consumption patterns in rural Malawi. Milling batches (30 kg) of four maize grain varieties were dehulled at three abrasive disk dehullers under controlled conditions. The impact of maize variety and dehuller design on mass and nutrient losses during dehulling was statistically significant (p < 0.05), with a mean mass loss of 28.1 ± 5.7%, and nutrient losses of 9.8 ± 1.9% for protein, 61.7 ± 2.0% for zinc, and 47.7 ± 3.6% for iron. Six FGDs conducted in rural areas of Lilongwe District revealed a preference for refined flour due to convenience and cultural norms, despite the nutritional benefits of whole grain flour, which was recognized for its ability to provide satiety, particularly during periods of maize scarcity. Participants also highlighted switching between flour types based on seasonal maize availability, social stigma associated with whole grain flour, and awareness of nutrient losses during dehulling. Given Malawi’s precarious food insecurity situation, transitioning from dehulled maize flour nsima to whole maize flour or less refined nsima, is imperative. Our study findings can have food and nutritional savings for other southern Africa countries where the dehulling is a common practice.
Public
Y⃒̸̷̝̜̙ͥͥͥngmar

Also got a doorbell. Made a little housing for it with a piece from the zinc scrap pile.

The wireless doorbell is pretty clever: Instead of using a battery and finding out it's empty because you missed a delivery, it has no battery at all. Instead, it generates enough power to squirt a radio message to the receiver from the force of the finger pushing the button to ring the bell. Clever.

A pile of dull silver coloured metal partially overgrown with weeds. There's pieces of airduct and a short bit of pipe, the rest is offcuts from sheets. It's galvanized or alloyed with zinc and didn't rust in its time outside.
A piece from the pile on top of an improvised worktop outside. Some tools are strewn around: Hammer, measuring tape, tin snips.
The same metal, now cut to a small piece and bent into a housing for a doorbell button. It has a projecting roof with bent over drip lip, and shorter sides. The button is black with a white label showing a ringing bell. It's mounted on a steel fence post with yellow paint, next to the green letterbox from yesterday.
#DIY#Steel#Zinc
Public
Robin Forlonge Patterson

#Consumer.org says about #batteries:
Product test writer Amy McNabb explained the three poor performers are #carbon #zinc. “Carbon zinc batteries often have words like ‘heavy duty’, ‘super heavy duty’ and ‘extra heavy duty’ in their name even though they’re the worst performing type”
“#Lithium batteries are the best performers but also the most expensive. They’re a good choice for high-drain devices like remote-controlled toys, as you won’t need to replace them as often as other battery types.”

Public *
💧🌏 Greg Cocks

Alaska's Rusting Waters - Pristine Rivers And Streams Turning Orange | Metal Mobilization From Thawing Permafrost To Aquatic Ecosystems Is Driving Rusting Of Arctic Streams
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phys.org/news/2024-05-alaska-r <-- shared technical article
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doi.org/10.1038/s43247-024-014 <-- shared paper
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#GIS #spatial #mapping #remotesensing #satellite #imagery #Landsat #earthobservation #Alaska #water #hydrology #Arctic #permafrost #melting #thawing #climatechange #waterchemistry #ecosystem #upland #waterquality #humanimpacts #discolourisation #BrooksRange #aquatic #foodweb #drinkingwater #watersecurity #subsistence #fishing #iron #Fe #rust #minerals #mineralogy #sediment #soil #sampling #pH #sulfides #weathering #erosion #drainage #streamflow #iron #zinc #nickel #copper #cadmium #waterresources #ecosystems

map - orange stream observations across the Brooks Range in northern Alaska
photo - aerial view of the Kutuk River in Alaska's Gates of the Arctic National Park that looks like orange paint spilling into the clear blue water.
photos, maps & charts - Time-series analysis of three discolored streams in northwest Alaska using Landsat
schematic - Conceptual models of hypothesized processes contributing to the discoloration of Arctic streams in Alaska’s Brooks Range
Public
michael

13-JUN-2024
Scientists unravel drivers of the global #Zinc cycle in our oceans, with implications for a changing climate
Studying the Southern Ocean is important as it acts as a central hub for global ocean circulation. Processes occurring in the Southern Ocean are imprinted on water masses which are then transported to the Atlantic, Indian and Pacific Oceans.

eurekalert.org/news-releases/1 #science #ecology #ClimateCatastrophe #GlobalCycles #EarthSystems

EurekAlert!Scientists unravel drivers of the global Zinc cycle in our oceans, with implications for a changing climateThe understanding of the global Zinc cycle in our oceans has important implications in the context of warming oceans. A warmer climate increases erosion, leading to more dust in the atmosphere and consequently more dust being deposited into the oceans. More dust means more scavenging of Zinc particles, leading to less Zinc being available to sustain phytoplankton and other marine life, thereby diminishing the oceans' ability to absorb carbon.
Public
Auscandoc

Revolutionizing Renewable Energy: Scientists Develop New Low-Cost With Over 8000 Uses scitechdaily.com/revolutionizi “Researchers at Linköping University in Sweden have developed a battery constructed from and that can be over 8,000 times. This innovation aims to offer an affordable and eco-friendly battery alternative, especially for regions with limited electricity access. The findings are detailed in the journal Energy & Environmental Materials.”

SciTechDaily · Revolutionizing Renewable Energy: Scientists Develop New Low-Cost Battery With Over 8000 UsesResearchers at Linköping University in Sweden have developed a battery constructed from zinc and lignin that can be recharged over 8,000 times. This innovation aims to offer an affordable and eco-friendly battery alternative, especially for regions with limited electricity access. The findings are d
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