As the field of chemical biology has grown, Nature Chemical Biology has expanded to reflect the diversity of science at the interface of chemistry and biology. Throughout this period, the editorial team has endeavored to publish leading research and thoughtful commentary across chemical biology and to present the field’s discoveries to the widest possible audience. As we enter our sixth volume,...

In this note we prove the following conjecture of Nowakowski and Rall: For arbitrary graphs G and H the upper domination number of the Cartesian product G H is at least the product of their upper domination numbers, in symbols: Γ(G H) ≥ Γ(G)Γ(H). A conjecture posed by Vizing [7] in 1968 claims that Vizing’s conjecture: For any graphs G and H, γ(G H) ≥ γ(G)γ(H), where γ, as usual, denotes the do...

Double Rydberg wave packets for He electronic states are propagated in time using fully quantum mechanical calculations. The wave packets are constructed so that the two electrons are simultaneously excited up to nRyd ∼ 15 states and coupled to total orbital angular momentum equal to zero and to total spin equal to zero. We attempt to construct a wave packet to isolate symmetric stretch motion....

ion in this case N must also be an abstraction for both (i) and (ii) and neither N → h R nor N p R for any p,R. application in this case M = M1M2 We prove (i) first, analysing the possible forms of M1 • Assume M1 is not an abstraction In this case IApp1 applies, so we know N = N1N2, M1 int ⊲ N1, and M2 ⊲N2. Since M1 int ⊲ N1, N1 is not an abstraction, then the only applicable rule for N → h R i...

Extending from the organizing crime perspective, we study how legitimate world actors contribute to structuring a criminal network. This focus also underscores the facilitating role that some participants have in criminal settings. Based on a case study of an illegal drug importation network that was monitored by law-enforcement investigators over a two-year period, we find that although most l...

In a field experiment under rainfed conditions, reductions in cane yield over three crops due to infection by ratoon stunting disease (RSD) ranged from 41% to 19 % respectively in varieties N17, N14, N21, NCo376 and N19. Losses in Nl2 were 10%, and in N23 and N22 were 7% and 1%. In a similar trial conducted under irrigation, the greatest reductions in cane yield over two crops were 32% in varie...

A quick method is needed to determine the susceptibility of sugarcane to attack by eldana borer. Plants of three varieties and of differing ages of cane were tested for attractiveness of the plant to an ovipositing moth and for the performance of the larva when feeding. The preference of moths for certain varieties was studied by releasing moths into a large cage containing potted plants of the...