Month: August 2012

Tuesday, 21 August 2012

09:53 – Thanks to Rod Schaffter for his suggestion yesterday that I fill the chemical bottles using a wash bottle and weighing the bottle as I fill it. Talk about a brilliant idea. I’m using ACS reagent grade 98% sulfuric acid, which has a specific gravity of just under 1.85 g/mL. Since all three solutions are 99:1 w/v sulfuric acid:chemical, I can take the specific gravity as 1.85 g/mL. That means to fill a bottle to 5 mL, I just transfer 9.25+ g of solution to the bottle, and to fill it to 10 mL I just transfer 18.50+ g. This should be a quick and easy method. Thanks, Rod.

In fact, I may start using Rod’s method to fill some other chemical bottles, particularly the ones that emit strong fumes, including acetic acid, ammonia, and hydrochloric acid. All of those contain either 15 mL in a 15 mL bottle or 30 mL in a 30 mL bottle, so I won’t even have to weigh those; I can just eyeball the fill level.

I have only two or three wash bottles on hand, and I think they’re all 250 mL. I’m going to add a dozen or two 500 mL unitary wash bottles to my next purchase order. That way, I can just dedicate one or two wash bottles per chemical and store the chemicals in the wash bottles. They’re LDPE, for which the Thermo Scientific chemical resistance table lists 98% sulfuric acid at 50C as “Little or no damage after 30 days of constant exposure.”

The forensic science book is officially published tomorrow, but Amazon already has it in stock and is shipping it. We’re starting to get more queries about the FK01 forensic science kit, which we plan to start shipping by the end of this month.

Barbara and her sister, Frances, are visiting and evaluating independent-living and assisted-living homes for their parents. They’re going to narrow down the candidates to three or four and then take their parents to visit their short list of facilities and ask them to pick one. Barbara’s and Frances’s goal is to get their parents moved to a suitable place as soon as possible. Once they’ve moved their parents, they’ll worry about getting their parents’ home cleaned out and ready to go on the market. I think this is a good plan. Their parents really need to be at a retirement home sooner rather than later. Barbara and Frances could then stop worrying constantly about something happening to their parents, and the facilities provided by the home would also take a great deal of the burden off them for running errands, taking their parents to doctor visits, and so on. For the last couple months or more, Barbara and Frances have been busy almost daily with things they have to do with their parents. They both need a break, badly, and getting their parents into a good retirement home will give them that break.


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Monday, 20 August 2012

07:49 – The euro game of smoke and mirrors continues. There was concern that Greece would be unable to pay off more than €3 billion in bonds that are coming due this month, thereby forcing Greece to default (again), but Greece was able to get off a €4.1 billion bond auction last week of three-month t-bills. The problem is, it really is all smoke and mirrors. The bonds Greece has to pay off this month are held by the ECB. The t-bills that Greece sold last week were bought by Greek banks, which borrowed the money to buy the t-bills from–you guessed it–the ECB. In effect, the ECB provided Greece with a bridge loan to carry Greece just long enough to get the next installment of the bailout, which is by no means guaranteed. Talk about the Walking Dead.

We continue to build and ship science kits.


15:33 – I’m re-ordering components for the science kits, and as always our costs are going up. I just had to post a notice on the biology kit page that we’re increasing the price of that kit from $170 to $185 as of 1 October. I hate doing that, but we simply can’t absorb these increases. The current price of the kits is based on components ordered and paid for back in February, and the costs have increased significantly in the last six months. Sometimes dramatically. One component, fortunately not one of the more expensive ones, has more than doubled in price since February. The government keeps reporting that inflation is low, but that’s sure not my experience.

Meanwhile, I’m about to make up three of the nastier solutions that are in the forensic science kit. All three of them are essentially pure concentrated sulfuric acid, with 1% of something added: diphenylamine (diphenylamine reagent), ammonium metavanadate (Mandelin reagent), or formalin (Marquis reagent). If you’ve ever worked with concentrated sulfuric acid, you know that it’s a dense, oily, viscous liquid. So I’m considering how to fill the bottles for the kits.

One method I considered and ruled out was to buy an auto-burette, which is basically an automated bottle filler. Each press of the pump dispenses the volume you’ve set on the device. Using it is quick and easy, and it’d be worth while if I were filling 500 bottles at a time, or even 200. The problem is, there’s a significant amount of time and effort required for set-up, tear-down, and clean-up. Using an auto-burette to fill 30 or 60 bottles at a time actually takes more time and effort than doing it manually.

I could just fill the bottles manually from a beaker, but concentrated sulfuric acid is difficult to pour into a narrow-mouth bottle without spilling it. The kits will include only 5 mL of diphenylamine reagent and 10 mL each of Mandelin and Marquis reagents, but we’re using 30 mL bottles for all three of them because the 30 mL bottles have wider mouths than the 15 mL and smaller bottles. The solutions are so thick and viscous that it’s almost impossible to pour them into the 15 mL and smaller bottles.

But before I decide to pour from a beaker, I think I’m going to try using a 10 mL serological pipette with either a pipette bulb or a pipette pump. It’s not that I’m worried about getting too much liquid in the bottles; rather I’m concerned about dispensing too little. It’s pretty tough to judge 10 mL let alone 5 mL in a 30 mL bottle. I could dispense by weight, but weighing each bottle to make sure it meets a minimum weight is a pain in the petunia. With the pipette and pump or bulb, it should go pretty quickly. Just suck up liquid from a beaker until it’s above the 5 mL or 10 mL index line, as appropriate, and then let it run into the bottle. The only thing that concerns me is the viscosity. The liquid may take too long to run out of the pipette. Oh, well. The only way to find out is to try it.

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Sunday, 19 August 2012

07:45 – Barbara and I worked all day yesterday building kits, and we’re in good shape again on finished-goods kit inventory. We have about two dozen each of the chemistry and biology kits ready to ship, and we got started on another batch of 30 chemistry kits. We’re also well into building the first batch of 30 forensic science kits.

I also made a very lucky catch last night. O’Reilly sent us two print copies of the forensic science book, and I was flipping through it last night while we were watching TV. I happened to notice that the instructions for one of the lab sessions told the reader to heat the 250 mL beaker in the microwave or on a hot plate. Hmmm. I was pretty sure that my preliminary bill of materials for the forensic science kit specified a 250 mL polypropylene beaker rather than glass. I checked, and sure enough the equipment list for the forensic kit listed the 250 mL PP beaker. If that had slipped through the kits would have shipped with the PP beaker and there would have been an epidemic of melted plastic beakers. So I changed the equipment list to substitute a 250 mL glass beaker. I hope that’s the only thing I overlooked.


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Saturday, 18 August 2012

08:03 – Barbara’s dad may go home from the hospital today. Barbara and her sister were surprised yesterday when the doctors said her dad might be released, but he is doing a lot better. Barbara and her sister laid down the law to the doctors, and told them that they’d take Dutch home if and only if he didn’t have any tubes remaining in him. This has been going on in one form or another since May, and they simply can’t deal any more with almost daily (or nightly) trips to the doctor or hospital for tests and treatments.

So we’re going to try to have an almost normal weekend. Unless there’s some kind of emergency, Barbara plans to spend the weekend at home doing regular stuff. I wanted her to take a couple of days off so she could just relax, but she insists she wants to work on kit stuff. So this morning I’ll do laundry and we’ll do final assembly on the current batch of 30 chemistry kits. Which is good, because with overnight orders our current inventory of chemistry kits stands at minus two. Once we complete final assembly on that batch and ship the outstanding orders today, we’ll get started assembling another new batch of 30 chemistry kits and building subassemblies for the first batch of 30 forensic science kits.


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Friday, 17 August 2012

08:02 – Barbara’s sister called at midnight to say that she was on her way over to their parents’ house to meet the 911 responders. Their mom had called 911 because their dad was breathing strangely and their mom couldn’t wake him up. At around 12:45, Frances called back to say that Dutch was awake and responsive, but they were transporting him to the emergency room. Barbara quickly dressed and left to meet them at the hospital. She got back home about 6:45 and said they’d just admitted him, finally. He’s in no immediate danger, but for someone aged 90 this whole sequence of events over the last two or three weeks isn’t good. Barbara got almost no sleep overnight. She’s sleeping now, finally, with Colin curled up next to her on the bed.

For the last ten days or so, Dutch has been on outpatient IV vancomycin to treat a drug-resistant S. aureus infection, with Barbara and her sister administering the drug daily and taking Dutch in daily to be tested for serum vancomycin levels. Our main concern at this point is that his levels have remained elevated, which indicates that the vancomycin isn’t being eliminated, which in turn suggests that Dutch may be in renal failure. At the same time, they’re concerned about Dutch’s persistent edema and congestive heart failure. He’s now simultaneously water-logged and dehydrated. The dehydration causes confusion and unresponsiveness, but hydrating him would increase the edema. Conversely, they can’t treat him with lasix or another diuretic to reduce the edema because that would dehydrate him even further. Everyone, especially Dutch himself, is exhausted and under extreme stress.


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Thursday, 16 August 2012

07:36 – Well, of those six chemistry kits I put together yesterday afternoon, three are spoken for by overnight orders. I may run dry again by this afternoon. We’ll assemble another two dozen over the weekend and get started on yet another batch of 30.

I also need to get some purchase orders issued. When I called one of our vendors yesterday to check price and availability, several items were back-ordered, some until mid-October. Fortunately, I have other sources for all the stuff with long lead times.


16:20 – We’ve sold a total of only four chemistry kits today, so we still have two left. I’m headed downstairs shortly to box up 24 more, or as many as I can do with the components we have on hand and ready to use.

Barbara is always coming up with new ideas for how to use my new shipping scale. It’s accurate to one gram up to 20 kg, so there are quite a few things I can use it for. Here’s her latest suggestion.

So I decided to give it a try here at home.

And I just found out something else it works fine for. I’d ordered 400 alligator clip leads, which come in packages of five in small plastic bags, all contained in a large plastic bag. So instead of counting to make sure I had 80 of the small bags, I just weighed the big bag, which was 3.99 kilos. I then weighed five of the small plastic bags, which weighed 0.25 kilos. Much faster than counting, and less subject to error.

Oh, and FedEx just showed up with two early copies of Illustrated Guide to Home Forensic Science Experiments. It looks great.

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Wednesday, 15 August 2012

09:48 – Barbara went to dinner with a friend yesterday, so I spent the evening watching Heartland reruns. Bizarrely, Netflix streaming has only the first 14 of 18 episodes in series three, so when I finished watching the final streaming episode I popped in the DVD to watch the remaining episodes.

The first menu that comes up when the DVD loads offers a choice between English and French, so just for the hell of it I chose French. I knew that Amber Marshall is an Anglophone, but I figured some of the other cast members might be bi-lingual, so I decided to see if the original actors had dubbed the French audio in their own voices. Nope. All of the voices I heard were done by other people.

But I did notice something strange. I don’t speak French, but I grew up in a neighborhood where many of the older people spoke Italian at home. That and my years of Latin often allow me to work out the general sense of what’s being said by a native French speaker and I’ve listened to quite a bit of spoken French. All I can say is that the French soundtrack didn’t sound French to me. It sounded like a severely degraded French overlaid with a strong accent. But whatever it was, it didn’t sound to me like French. I thought people in Quebec spoke French, but apparently not.


We’re now officially out of chemistry kits. We ran dry this morning, with three orders overnight that accounted for the only three finished chemistry kits remaining in stock. So today I’ll start final assembly on another 30 and move them to the finished-goods inventory area. Then tomorrow or Friday I’ll start building yet another 30, as well as ordering in some components we’re going to run short of.

I ended up spending most of yesterday completing a project that had been high-priority on my to-do list, but had slipped down out of sight. The forensic science book hits the bookstores one week from today. At the end of each group of lab sessions, there are review questions. I was supposed to have done an answer key document for those questions, but I didn’t get around to it until yesterday. So now it’s complete and ready to go.


14:31 – I just received the last item but two required for the forensic science kit. I actually ordered those missing items, along with one other item, on 1 August from imedmart.com. Don’t ever order from them. I got an email from them soon after I placed the order, confirming that I’d placed the order, but without saying what I’d ordered. The email said they’d send me another email with tracking information once the order had shipped. So I waited. And waited. And waited. Finally, on 9 August, I visited their web site again to check the status of my order. Of the three items I’d ordered, two had disappeared from my order as shown on their web site. The third item was listed as “processing” or something similar. So I called their “support” phone number.

At first, everything seemed normal. Rotten elevator music, and a recorded voice that popped up periodically to tell me that my order was important to them. Yeah, right. After the first five minutes or so on hold, the recorded voice changed. It now told me that I was second in line and could expect a four minute wait. A minute or so later, it came back to say I was second in line and could expect a six minute wait. Eh? Then a minute or so later it came back to tell me that I was now first in line and could expect a ten minute wait. Crap. At the ten minute mark, I got a different recording that told me their customer service reps (which I’m sure was an exaggeration; there can’t be more than one, if that) were extremely busy and that I should fill out a support request form on their site. It then hung up on me. I went to that page and filled out the form, which told me I could expect a response within 36 hours.

On Friday, I got an email from them telling me that my order had shipped. Again, no details about what exactly had shipped, nor any tracking number or other information. The order showed up yesterday. The only thing it was the one item they’d admitted that I ordered. So I called back and wasted another ten minutes trying to find out if they ever intended to ship the other two items or not. I finally left them a message on their customer “support” feedback form telling them I was going to order the other two items elsewhere, so please cancel them. And that if they did ship them to me, I’d dispute the charge on my credit card.

I still needed those two items, so I went off to Google in search of a reasonable price on them. I found one, which was about $90 not including shipping for those two items, versus $79 plus shipping from imedmart.com. The vendor is called Cooper’s Nutrition/Living Naturally, and it’s obviously a small family business. I entered the two items in my shopping cart, and clicked on the checkout button. Something happened to me that had never before happened in all of the hundreds of transactions I’ve done to purchase products on-line. The site thanked me for my order and displayed an invoice. It emailed me a copy of the invoice. No problem at all, except that it never asked me for my credit card number.

So I went to their customer support feedback page–one of those things with fields at the top for your name and email address–and left a message saying what had happened. A moment later, I got an email bounce from them quoting my feedback message and saying the email to them was undeliverable. So I tracked down a phone number for them–not easy, since they don’t publish it on the site–and called the place. The guy who answered laughed when I told him what had happened. He said they hadn’t gotten their site setup to take credit card information yet (they’ve been running since 1999), and that he’d have called me to get the credit card information over the phone. He said he’d call me back in a few minutes after he’d checked to see if the two items I’d ordered were in stock. Four or five hours later, I finally called him again. He said he’d been meaning to call me, but had been busy. Okay, I can understand that. He said both items were out-of-stock, but they’d have them in Thursday. He said they’d ship Priority Mail, which means I should get them maybe next Tuesday. That’s soon enough, but I’m glad I followed up.


15:46 – So, I decided to do a quick mini-batch of 6 chemistry kits, just to hold me for the next couple days, I hope. I packed all of the items needed in six shipping boxes. Except for the 100 mL graduated cylinders. I had none of those in inventory, at least not on the shelves. But I did have stacks and stacks of boxes sitting in the library, and among them I knew there was one that had 120 100 mL graduated cylinders in it. I even knew which vendor it was from and that it was in the group of four boxes that arrived from that vendor last week. That meant it was toward the front of the piles.

As long as I was opening boxes, I figured I might as well check the contents against the packing list. So I opened all four boxes–the graduated cylinders were in the last one, of course, and checked all the items in, getting dirty and sweaty in the process. Now, instead of four large boxes sitting in the library, I have bunches of small boxes: twenty dozen each of the 50 mL and 100 mL beakers, twenty half-dozen boxes of 250 mL beakers, ten dozen of the 100 mL graduated cylinders (less the six that I pulled out for the kits I’m building), and so on and so on.

What I want to know is where Obama was while I was doing all this. According to him, I didn’t do it myself. But I sure didn’t notice him helping. Quite the converse, in fact. Just about everything he does hinders people who are just trying to build and run their businesses.

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Tuesday, 14 August 2012

07:57 – My life is now all about building and shipping kits. We shipped eight kits yesterday and have three lined up to ship so far today. And that’s fine. I knew it’d be this way in August and September, and even into October. We’re still shipping kits immediately, the same day the order is received or the following day for orders received late in the day, At this point, we have about 120 total kits either in stock and ready to ship or a-building, but once that reserve runs dry it’ll take us longer to build more new kits from scratch. But all we can do is the best we can.


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Monday, 13 August 2012

09:46 – Barbara arrived home around 6:00 to loud acclaim. She thinks Colin didn’t miss her because he’s my dog. In a sense, that’s true. He’s the first-ever dog we’ve had that prefers my company to Barbara’s or my mother’s. And Border Collies generally are one-person dogs. But Colin likes Barbara, too. He made his displeasure at her absence clear the whole time she was gone, misbehaving and whining constantly. Border Collies think they’re in charge of almost everything, but there are exceptions that they concede are their humans’ responsibility. One of those things I’m responsible for is making Barbara come home when she’s supposed to. And Colin made it quite clear while Barbara was gone that I was failing in my responsibility.

I didn’t get any chemistry kits built yesterday, but I got a good start on the next batch of 30. Those are close enough to complete that I can quickly assemble one or a few as needed. At worst, there might be a one-day shipping delay. I’m going to print up another 60 sets of labels for the biology kits and 60 for the chemistry kits. Labeling and filling bottles is the most time-consuming part of building the kits, so we’ll be doing that every spare moment.


17:24 – I was just looking around Netflix streaming for something new to watch when I came across Primeval, a British show. It’s kind of a nature show, set contemporaneously, but with dinosaurs trying to eat the scientists. I watched only the first few minutes of the first episode, but I kept thinking that what these guys need is my .460 Weatherby Magnum, with armor-piercing bullets. The .460 with standard loads delivers 8,000+ foot-pounds at the muzzle, more than the .600 Nitro Express. It’s also a bitch to shoot, with free recoil of 100+ foot-pounds force. That’s about five times the recoil impulse of a typical .30-06 rifle, and more than three times a 12-gauge magnum with heavy loads. Not something you’d want one of the girl scientists on this show trying to shoot. Of course, it’ll also shoot through an elephant lengthwise, literally, as long as you don’t mind paying $14 per round.

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Sunday, 12 August 2012

11:55 – Barbara will arrive home this evening, and be greeted by Colin and me barking and doing our happy dance.

It’s fortunate that I got another 30 biology kits built yesterday, because yesterday and today we sold the last half dozen from the previous batch. We came within one day of running dry. Today I’m working on chemistry kits. We’re down to four of those in stock, and I’m going to try to get 30 more assembled today. Well, 25 actually, because we have only 25 small parts bags in stock. I have the components to build another hundred small-parts bags, so I’ll just go ahead and assemble 30 chemistry kits and set five of them aside until we’ve built more small-parts bags.


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