It’s also worth noting that even if alternatives superior to agar were found, scientists are reluctant to abandon established protocols (even when microbiologists do use other jellies, they often still add agar to the mix, for example, to increase the gel strength of the solid media). As agar has been the standard gelling agent in microbiology for around 150 years, an enormous infrastructure of standardized methods, reference values, and quality control procedures has emerged around its specific properties. Switching to a different medium (even a superior one) means results may not be directly comparable to decades of published literature or to other laboratories’ findings.
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47 pairs have negative mean SSIM: the source and target are anti-correlated, sharing less structure than random noise. The worst offenders:，更多细节参见Line官方版本下载
Artemis 2 works toward April launchThe revised campaign comes as engineers work through immediate issues on Artemis II, the first crewed flight of the program. After a successful "wet dress rehearsal" — a full countdown test that loads the rocket with super‑cold fuel — teams discovered that helium was not flowing correctly to the engines in the rocket's upper stage.