Friday, October 27, 2023

more carbon rings

I reported the discovery of a new allotrope of carbon, the C18 cyclocarbon, back in 2019. It took a while, but the groups involved in that paper have now presented another new ring molecule made only of carbon, C16. This time the extra challenge is in the fact that it is anti-aromatic (hosting 4n rather than 4n+2 atoms in the ring). A group in China has also produced several such rings in different sizes with a similar method. Their papers aren't officially published yet but available as preprints.

My news story in Chemistry World is out now (open access if you haven't used up your monthly quota of free stories):

Carbon's anti-aromatic allotrope is ringing the changes

The paper is out in Nature online (but not in this week's issue) and is on open access. UPDATE The paper is now in the issue of 29.11.2023, page 977, together with one of the papers from the Wei Xu's group, on page 972

And here is the recipe:

Source: © Yueze Gao et al 2023

The precursor 4 is deposited on a NaCl surface and the carbon monoxide and halogen masking groups are then eliminated to give the cyclocarbon C16

Thursday, October 26, 2023

bakery to butcher's shop

Every picture tells a story, season 3, picture 4:

The little boy we saw in the picture of the three children from the bakery at Dörndorf (Kreis Frankenstein, Silesia), Willi Geppert, chose not to follow in his fathers trade (reasons unknown) but did an apprenticeship as a butcher instead. Which strikes me as odd as he comes across as a smiley and gentle person in his photos, so I don't really visualise him chopping large mammals to pieces, but here we are.

He did his apprenticeship from 1.4.1931 to 30.9.1934 with Paul Loge in Heinersdorf (today: Dziewiętlice). Specific mentions for slaughter and sausage making. His behaviour was "good". He passed his exam on 25.9.1934 at the district capital Frankenstein. He then continued to work with Loge until the end of March 1935, then half a year with Georg Noglitz in Frankenstein. Then there is an 18-month gap in his record which I assume must have been his time in military service. In 1937/38 he worked with M. Gottwald in Hertwigswalde (Doboszowice), Paul Drechsler in Kamenz, and Gustav Welz in Münsterberg. The last one had a nice rubber stamp revealing the address: Pusillusstr. 6. All places appear on this map of the Kreis Frankenstein, so the Wanderschaft didn't take him very far. Listing those names as I'm guessing any of them could be in the photos below.

Here are some photos which came without any explanations, but which to me look like they could be related to his budding career as a butcher (Willi is on the left in the first two pics, have fun spotting him in the others!):

Not at all sure what to make of this one but throwing it in anyway:

Should anybody have any answers to some of the many questions I am raising in this series, please leave a comment here (I'll need to vet it, so it may take a few days before it goes public) or contact me at michaelgrr [at] yahoo [dot] co [dot] uk

Navigation tools:

Season 3 so far:

  1. family holiday
  2. play time
  3. fashion show
  4. bakery to butcher's shop

The Mastodon thread for season 3 starts here.

You can find Season 2 entries in this thread on Mastodon (complete now!) or via the list at the bottom of the last entry of the season (and also at the bottom of the first entry of this season).

The twitter thread for season 1 is still here. Alternatively, visit the last instalment and find the numbered list of entries at the bottom.

Monday, October 23, 2023

all about cephalopods

Today's issue of Current Biology is a special on cephalopods (octopuses, squids, cuttlefish, and nautiluses) with lots of contributions on various aspects of these amazing species, with a focus on their neurobiology and behaviour. My contribution looks at the way we treat octopuses and other cephalopods and asks whether, given what we are now beginning to realise about their intelligence, it is still acceptable to farm them for slaughter, as a company in Spain is planning to do.

Octopus etiquette

Current Biology Volume 33, Issue 20, 23. October 2023, Pages R987-R990

Restricted access to full text and PDF download
(will become open access one year after publication). Actually, right now on publication day, this link is providing open access probably because it's part of the special theme section (everything in the section seems to be open access). Should this change, try the

Magic link for free access
(first seven weeks only)

See also my Mastodon thread where I will highlight all this year's CB features.

Cover of the special issue. Image: broadclub cuttlefish (Sepia latimanus) (photo © Kimberly Tripp Randal; instagram @KimberlyLTripp).

Saturday, October 21, 2023

three horsemen of distrust

One of the many worrying developments of our time is the growing lack of trust in objective rationally testable (and falsifiable) facts of science. I am on the lookout for explanations what went wrong with our science-based civilisation and how we can fix it, so was happy to review

Gary Smitn
Distrust: big data. data torturing and the assault on science
OUP 2023

Smith is an economist and maybe a bit more interested in the idiocies of bitcoin than I am, but otherwise he is very convincing in his analysis of three leading horsemen of the distrust apocalypse, namely disinformation, data torturing, and data mining. Ironically, all three are riding on the advances of the technological revolution that were supposed to make us smarter. Read all about it in the October issue of C & I:

What went wrong?

Chemistry & Industry Volume 87, Issue 10, October 2023, Page 34

access via:

Wiley Online Library (paywalled PDF of the whole review section)

SCI (premium content, ie members only)

As always, I'm happy to send a PDF on request.

OUP

I have no idea what the cover image is showing, but I like it.

Thursday, October 19, 2023

fashion show

Every picture tells a story, season 3, picture 3:

The middle child of the three from the bakery at Dörndorf (Kreis Frankenstein, Silesia), Emma Geppert, later gained a bit of a reputation as somebody who wanted to live the good life at the expense of others and sniffed at Hedwig's employment on farms and the associated smells. Accordingly, photos of her were buried deep and not exactly celebrated in the family. Once we identified her in the sibling photos, however, I discovered quite a few more photos of her. In these, she expresses her being different from the hardworking family in the relatively conspicuous clothes she wears - even in difficult times.

A set of three photos all dated 1.6.1941 shows her in three different outfits:

Here's one she wore earlier, dated Breslau 1938 with the remark on the back that the photo didn't turn out well.

Another one from Breslau with no inscription, but the city's Kreuzkirche is recognisable on the left (in all the zillions of pre-1950 photos we have this is an extremely rare example of a recognisable cityscape showing up in the background).

Here is a postcard from 1941 of the same perspective minus Emma (hotlinked from the site that sells the postcard). Emma's photo fits in roughly between the tree on the left and the right hand side of the watermark in the middle.

Some serious dressing up went into this one, but again she wasn't quite happy with the result:

And I think this may be her as well, although less flamboyantly clothed and less round-faced, but I setting looks like the cabbage garden where they also took the sibling photos. Part of the problem with identification is that there may have been any number of cousins that may had some resemblance with the bakery kids, but other than the recently discovered portrait of Lotti Geppert we don't know anything about any of them.

Should anybody have any answers to some of the many questions I am raising in this series, please leave a comment here (I'll need to vet it, so it may take a few days before it goes public) or contact me at michaelgrr [at] yahoo [dot] co [dot] uk

Navigation tools:

Season 3 so far:

  1. family holiday
  2. play time
  3. fashion show

The Mastodon thread for season 3 starts here.

You can find Season 2 entries in this thread on Mastodon (complete now!) or via the list at the bottom of the last entry of the season (and also at the bottom of the first entry of this season).

The twitter thread for season 1 is still here. Alternatively, visit the last instalment and find the numbered list of entries at the bottom.

Thursday, October 12, 2023

play time

Every picture tells a story, season 3, picture 2:

After Ruth and the children on the mountain, here comes Richard with the same children playing games. This picture of domestic bliss may be a game of Skat. It says W. 1957 on the back, so I'll take that as Christmas (Weihnachten) 1957, which also explains the ties.

A few years earlier, Richard had tried to encourage his daughter to learn the recorder, but I am told that this didn't last long. This picture dates from Christmas 1952:

Both photos must have been taken in the family's flat in Idar-Oberstein, Hauptstraße 318 (I found the building on a recent visit, will do a separate post on that some time).

Should anybody have any answers to some of the many questions I am raising in this series, please leave a comment here (I'll need to vet it, so it may take a few days before it goes public) or contact me at michaelgrr [at] yahoo [dot] co [dot] uk

Navigation tools:

Season 3 so far:

  1. family holiday
  2. play time

The Mastodon thread for season 3 starts here.

You can find Season 2 entries in this thread on Mastodon (complete now!) or via the list at the bottom of the last entry of the season (and also at the bottom of the first entry of this season).

The twitter thread for season 1 is still here. Alternatively, visit the last instalment and find the numbered list of entries at the bottom.

Monday, October 09, 2023

birds that walk

New Zealand is home to many weird and wonderful bird species, including quite a few that can't fly. This is easily explained by the absence of land mammals on these islands since the time of the dinosaurs. Since human arrived and brought other mammals with them, many of these unusual bird species have become vulnerable. Like island species elsewhere, some have become extinct, and many others are now in danger of extinction.

Following a suggestion from the editorial team, I used my latest feature to study (from the other side of the world) the intriguing world of NZ birds and the conservation work that is needed to keep them alive:

Land of the birds that walk

Current Biology Volume 33, Issue 19, 9. October 2023, Pages R987-R990

Restricted access to full text and PDF download
(will become open access one year after publication)

Magic link for free access
(first seven weeks only)

See also my Mastodon thread where I will highlight all this year's CB features.

The endangered kakapo is one of New Zealand’s 16 surviving species of flightless birds. Twice winner of the Bird of the Year competition, it is benefiting from intensive conservation management. (Photo: Jake Osborne/Flickr (CC BY-ND 2.0).)

Thursday, October 05, 2023

family holiday

Every picture tells a story, season 3, picture 1:

In August 1953, Ruth, Richard and their children took their second ever (and last) whole-family holiday trip to Kiefersfelden, Allgäu. They travelled there by train (a special holiday train, so there wouldn't have been much hassle with connections), as they still lived in Idar-Oberstein and didn't have a car.

Richard obviously took this photo of the other three on the summit of one of the surrounding mountains. I think this may be one of the many peaks of the Kaiser Mountains, but I have no idea which one. I recognise the "Wilder Kaiser" (wild emperor) as a term that was used in the family, but even that covers several peaks. And now I learned that there is also a tame emperor, which may be more accessible for a family group, but that term also covers several peaks.

... and then this one on the way down:

Should anybody have any answers to some of the many questions I am raising in this series, please leave a comment here (I'll need to vet it, so it may take a few days before it goes public) or contact me at michaelgrr [at] yahoo [dot] co [dot] uk

Navigation tools:

With this post I'm starting season 3 so nothing to navigate yet, but here this is the table of contents of the entire second season:

  1. could be a cousin
  2. two weddings in Silesia
  3. off to Canada
  4. off to Australia
  5. a very romantic poet
  6. fireman August
  7. 50 hundredweight of coffee
  8. mysterious Minden people
  9. horses for Hedwig
  10. guessing the great-grandmothers
  11. cousin Charlotte
  12. three sisters from East Prussia
  13. travelling saleswoman
  14. family portrait
  15. dancing chemist
  16. games time
  17. desperately searching Wilhelm
  18. the third Hedwig
  19. patchwork portraits
  20. missing brothers
  21. the oberlehrer's family
  22. a double wedding
  23. mystery solved
  24. young Frieda
  25. old aunts and young children
  26. a semi-mysterious aunt
  27. a gathering at Gellrichs
  28. farm work at Bad Landeck
  29. meet the Weitze family
  30. a post-war wedding
  31. the joy of chemistry
  32. the joy of botany
  33. becoming Frieda
  34. becoming Peter
  35. bakery kids united
  36. the four from the farm
  37. neighbours at Hamborn
  38. family with fowl
  39. the elusive Nagel clan
  40. the house Johanna built

I have now given up on bird site, and switched to logging the entries in a thread on Mastodon (season 2 link) instead. The thread for season 3 starts here.

The twitter thread for season 1 is still here. Alternatively, visit the last instalment and find the numbered list of entries at the bottom.

I'm also adding all photos from this series to my family history album on flickr.

I also should mention from time to time that this whole thing with old photos has been influenced by all the orphaned photos I see on flea markets, and by this little book I found at Oxfam 14 years ago.

Sunday, October 01, 2023

a pawnshop lost and found

Three years ago, I found two of the three houses in Wuppertal where Heinrich the cellist and Maria lived between 1919 and 1960. The one I was still missing forms a somewhat unfortunate historical hinge between the two and it took me a visit to the city archives to pin down its location.

The story as we knew it so far is that in 1931, Heinrich was put in charge of looking after the city-owned pawnshop, which entailed moving into a flat on the first floor of the same building. In early 1933, there was a minor scandal in that some items went missing from the site, and Heinrich launched an official investigation. Unfortunately, the investigation found that it was his wife Maria who had helped herself to some of these. An expert for the court diagnosed an underlying psychiatric problem for which she got some help, while Heinrich ended up in another office job in the administration of corporate tax matters.

I was hoping to find newspaper reports or official documents on the scandal and its resolution but had no luck with that. However, I did find the address of the pawnshop, and with that I could confirm dates when Heinrich was recorded as living in that building, and the names of the people in the position before and after him.

The archive has a very thin and patchy file on press clippings relating to the city’s pawnshops. The clippings were mostly about the social issues attached to pawnshops, such as poverty, risk of bankruptcy, etc. (The reason why cities engaged with this kind of business at all was that it was seen as a social good to keep people in need safe from predatory lenders.) No mention of the scandal I was looking for. I learned that both Barmen and Elberfeld had one of their own – they only merged in a new location in February 1940. Elberfeld’s shop is the one we’re after and it has a longer history going back to 1821. It started out in a slaughterhouse in Brausenwerth, and in 1888 it moved to the house in Obergrünewalder Straße 21, which was also the address when Heinrich and Maria moved in to live above the shop.

The address books available on microfiche (!) have a very handy section where you can find things by address and see who owns the building, what it is used for, and/or who lives there. In the 1930 edition for Elberfeld, we find Heinrich still at the old address, Schleswiger Str. 45, listed as a Stadtobersekretär, on the third floor. In 1932, has disappeared from this address but no new tenant has shown up for the flat as yet.

Under Obergrünewalder Straße 21, however, we find, eureka, the “Städtische Leihanstalt” – no wonder I couldn’t find it before, I wouldn’t have thought of giving it that name! Heinrich is listed as resident on the first floor, still Stadtobersekretär. His predecessor in the flat and presumably in the job, was listed in the 1930 edition as Otto Drees, Leihhausverwalter.

According to my previous information, they moved to Gronaustraße 35 in June 1933. However, the address book Barmen 1934 still lists this street as Königsstraße. It was renamed some time after the 1929 merger because Elberfeld also had a street with that name (see below). In Königsstraße 35 he is listed on the first floor as a Reisender (travelling salesman) which seems to suggest that he was suspended from his position in the city administration for some time while the investigation was ongoing. Not sure if he actually worked as a travelling salesman or whether this was just a euphemism for unemployed?

The first united addressbook for Wuppertal, dated 1935, has the new street name Gronaustraße and lists Heinrich as Stadtinspektor, which is two pay grades above his previous classification as Obersekretär. His successor in the pawnshop is named as Karl Schwabe, Stadtass.

Further files I consulted contained a detailed description of how the pawnshop worked – the staff members included three permanent helpers, a clerk responsible for the till, an apprentice and two magazine workers, so a total of eight people. Elsewhere, there is also a mention of experts for the valuation of specific groups of items. Heinrich is named in a document dated 1.12.1931. After that, however, the file goes dark and the next document dates from 1937.

After leaving the archive, I took the Schwebebahn to the Luisenviertel to find the old pawnshop and was very pleased to find that not only it survived but also it is in the very heart of the Luisenviertel which at least today is an extremely attractive neighbourhood with lots of restaurants. I think it is this building on the corner, shown below, which today goes as Friedrich-Ebert-Straße 38, as the building to its left on the Obergrünewalder Str. is number 19 and the next buildings on the other side of the corner plots are number 24 (confusingly) and 25. Which would fit my theory that the two corner plots were reassigned to Friedrich Ebert Str. but were previously known as Obergrünewalder Str. 21 and 23. Incidentally, today’s Friedrich Ebert Str., the main axis of Luisenviertel parallel to Luisenstr., was historically the Königstraße of Elberfeld, so in 1933 Heinrich moved from the corner of one Königstraße to the other.

Anyhow, I am adopting this lovely building here, prove me wrong:

This is the front towards Obergrünewalder Straße (with parts of number 19 on the left) with a shop selling Wuppertal merch (note the Schwebebahn-inspired murals below the windows!):

And this is the Friedrich Ebert side of things with an estate agent:

Update 5.10.2023. I now found a historic Pharus map from the 1920s which has the "Städt. Leihhaus" marked on the other side of Friedrich Ebert Str., i.e. where the modern red building is on the second photo. That's a shame, because nothing old survives there, the next two buildings also look like they were built in the 1950s or later. Oh, and I found this blog entry from the local Sparkasse (savings bank) on the history of the concept and social importance of pawnshops.