Fresh Express recall...did you hear about this?
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7 years ago
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gsciencechick
7 years agoRelated Discussions
I'd like to hear more about 'expanded shale'
Comments (17)Zeolites are molecular sieves, crystalline materials with a porous atomic structure. The zeolite's nanoscale pores provide an immense amount of void space. In addition, the void space exhibits an ionic charge that allows it to bind water molecules conditionally. Zeolites can hold water very tightly, but will release water readily in response to subtle environmental changes. In industry, zeolite beds capture water from wet gas streams. At several atmospheres of positive pressure, a zeolite will bind the water content in a gas stream, allowing the dry gas to pass. Zeolites have large surface areas and a large capacity for adsorption. However, when the pressure is dropped, just slightly, zeolite can quickly release this same water content. The equilibrium condition toggles based on a minor pressure adjustment. The benefits of zeolites are (1) a high holding capacity, (2) a tight binging of water in wet environments, (3) a rapid release of water in dry environments. Furthermore, these materials are durable and their porosity is molecular. When the material is crushed, it reveals additional surface area. Expanded shale is not a true zeolite. It is a haydite material, possessing the same crystalline structure but lacking the ionic interactions. The absence of ionic exchange is not necessarily a bad thing. It seems true zeolites can force salts out of the water (hence the sieve term), while haydites do not exhibit enough ionic potential to squeeze salts from solution. At high salinity, water won't enter the haydite; it will flow from the haydite to dilute the salt. I've attached an interesting article on "bonzai mediums", including mediums that behave like expanded shale. The applications may seem very specific, but the article details a plethora of sophisticated soil amendments. Expanded shale looks like a great product. I'm down the street from a major producer, and I'm tempted to drive over and ask them about it. A local garden show, Gardenline, has verified that expanded shale can be used as a topdressing on existing lawns. Has anybody used shale for amending hard clay and turf drainage issues? I'm looking for a top dressing recipe and a rate of application....See MoreQuestion about hearing baby's heartbeat.....
Comments (15)I had problems with my second pregnancy. I was going to the doctor every 2 weeks until the last couple of months when I went every week. Apparently the placenta had moved until it was in the front of my uterus so they couldn't hear the heartbeat and I wasn't gaining much if any weight each time I went in--only gained 18 pounds for each pregnancy. Any way--long story, short--I had ultrasounds at least once a month--but usually after every visit because of the placenta moving. I had a very inactive baby too so I could go a long time with no movement at all. I hope you call the doctor and they can get you in for peace of mind. Good luck. Sheila...See MoreHoping to hear about the Big Chill Pro Gas Range
Comments (111)I thought I would post an update to my situation... after having thermostat things replaced, things were working better but still not normally. Now I would say we are back to square one. I can't depend on the oven to keep temp. I couldn't dream of getting it to do 450 degrees and stay there. The holidays are coming and I'll plan our cooking around it. People have posted here considering purchasing Big Chill and I would never recommend buying BIg Chill. Their customer service is terrible, nearly non-existent. Something is very wrong with their engineering (Bluestar) since a gas oven isn't exactly rocket science. The cheap tin can GE range that the Big Chill replaced worked a million times better. In our previous house we installed a Viking dual fuel. It was solid as a rock, never had an issue with it. Why did we buy Big Chill? If I'm being honest, it was because they look great. Beautiful colors, great styling. I did a little research but come on, would anyone expect all these troubles from a gas oven range? We are considering buying an induction range. It would be really easy to buy a Big Chill Induction in French Blue to replace our lemon. But I won't be taking that chance. This time around I will maybe have to forego the looks for something that works. I just don't want to take another gamble on Big Chill....See MoreAny expressions that irk you?
Comments (192)I was watching a news program the other day, when the talking head clearly said, "he has a tough road to hoe." I think hoeing any road would be pretty darned tough. The expression is clearly supposed to be "a tough row to hoe," yet I constantly hear people say it as road....See MoreUser
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