K(CsHsN2OE).3H20, monoclinic, P2~/c, Z = 4, a = 11.676(3), b = 6-572(2), c = 13.072(2) A, fl --110.24(2) ° , V = 941.1 (4) ,/k 3, D c --1.54, D o = 1.55 (1) Mg m -a. The structure was determined by direct methods and refined to R w = 0.063. The dimensions of the thyminate ion differ significantly from those of thymine only in the internal ring angles at the deprotonated N atom (5.6 ° smaller) and adjacent C atoms (5.2 and 3.2 ° larger). The crystal is held together by an extensive hydrogen-bonding network involving the water molecules.

No abstract

We compared the effectiveness of various methods for surveying medium and large wild mammals in southern Oman. Working with volunteers recruited by Biosphere Expeditions, wildlife professionals and local rangers, we used direct observation, camera traps, sign surveys (tracks and/or dung) and molecular scatology to study 66 sampling units of 2 × 2 km (grid cells) in an area of 32 × 36 km during a 4-week period in February–March 2011. Sixteen mammal species were recorded, and the largest numbers of species were recorded by sign surveys and camera traps (both n = 9); sign surveys, direct sightings and DNA scatology recorded species across the largest number of grid cells. For species with a sample size large enough for comparison (i.e. detected in ≥ 8 grid cells), DNA scatology proved most effective for detecting caracal Caracal caracal, signs for hyaena Hyaena hyaena, ibex Capra nubiana, porcupine Hystrix indica and hyrax Procavia capensis, and signs and direct sightings for mountain gazelle Gazella gazella. Clustering, in which records from multiple methods are either adjacent or overlapping, was highest (≥ 76%) for the wolf Canis lupus, porcupine, ibex and gazelle. Our results indicate the best methods to detect and record the distributions of individual species in the study area, and demonstrate the advantage of using multiple methods to reduce the risk of false absences or partial detections. Our findings also highlight the potential of clustering as a means of cross-checking results of observations that are skill-dependent, which is particularly useful when employing a large workforce.

~' 1525) and this work, [Pt (NJ-I 2 CH2CH 2 NJ-ICH 2 CH 2 NH2)(N03) l-N03). It was possible to explain the results and postulate the conditions under which monomeric Pt C:II} hydroxo and aquo complexes might be obtained (Lock, C.J.L., ACS Symposium Series, Inorganic Chemistry in Biology and Medicine (1980) 140, 209) using Brown's model (Brown, LD., J. Chern. Soc., Dalton, in press). We have nm< obtained such complexes ([Pt(NH 3)2(0H)CsH 7 N 3 0)JN0 3 •2H20 and TPt (NJ•I3) 2 (OH2J (C5H7N 3 0) l N0 3 •HzO) and have examined their structures. The predicted hydrogen bonding requirements are observed.

Ausgehend von cis‐ Pt(NH3)2Cl2 erhält man mit 1‐Methylcytosin den entsprechenden cis‐Komplex.