Stream and lake ecosystems in agricultural watersheds are exposed to fungicide inputs that can threaten the structure and functioning of aquatic microbial communities. This research analyzes the impact of the triazole fungicide tebuconazole (TBZ) on natural biofilm and plankton microbial communities from sites presenting different degrees of agricultural contamination. Biofilm and plankton comm...

Miniaturized mass spectrometers are becoming increasingly capable, enabling the development of many novel field and laboratory applications. However, to date, triple quadrupole tandem mass spectrometers, the workhorses of quantitative analysis, have not been significantly reduced in size. Here, the basis of a field-deployable triple quadrupole is described. The key development is a highly minia...

The embryological and postembryological development of Thelastoma bulhoesi was determined. Initial cleavage was into unequal cells and occurred within 1-2 hours at 25 C. Cell division was holoblastic but no true morula is formed. Gastrulation occurred at approximately 48 hours by epibolic synectic mechanisms. First-stage larvae were fully developed at 96 hours. The molt to second-stage larvae w...

A series of 2-(substituted phenyl)-1H-benzimidazole (1-10) and [2-(substituted phenyl)-benzimidazol-1-yl]-pyridin-3-yl-methanone (11-19) derivatives were synthesized and tested in vitro for their antimicrobial activity. The results of QSAR investigation indicated the importance of molecular descriptors, dipole moment (mu), log of octanol water partition coefficient (logP) and second order molec...

In the title polymeric compound, [Mn(N(3))(2)(C(13)H(11)N(3))(2)](n), each Mn(II) centre is six-coordinated in an octahedral geometry by six N atoms from four 1-(4-pyridylmeth-yl)-1H-benzimidazole (L) ligands and two azide anions (N(3) (-)). Each of the Mn(II) ions lies on an inversion centre. The L ligands and N(3) (-) anions bridge adjacent Mn(II) centres, generating a polymeric chain running...

In a flock of cashmere goats sited in Asturias (NW, Spain) diminished efficacy was observed following treatment with netobimin and consequently a study to demonstrate the existence of anthelmintic resistance and the species of nematode involved was conducted. Results from faecal egg count reduction tests before and after treatment with netobimin or ivermectin showed efficacies of 89.4 (81.8-94....