A facile strategy based on the reaction of urea and boric acid is developed for the synthesis of toxicity-free BCNO nanocrystals containing carbon impurities and which exhibit efficient multi-color fluorescence under both single-photon and two-photon excitation.

Tab. 1. NMR-Spektren substituierter Acetanilide a . a In CDC13 , 60 MHz. b Die Zuordnung erfolgte unter der plausiblen Annahme, daß in der eis-Verbindung der Methylteil der CH3CO-Gruppe oberhalb der aromatischen Ringebene zu liegen kommt, ihr NMR-Signal im Vergleich zur fransVerbindung also nach höherem Feld verschoben sein sollte. c Im Falle des cts-2.6-Diisopropyl-acetanilides zeigen die iso-...

Comparison of the results of bacteriological culture and microscopic examination of urine samples transported over a distance by the dip-inoculum transport medium, ice-box, and boric acid preservation with "natural" urine specimens showed that the last, in a final concentration of 1.8%, gives satisfactory preservation.

The objectives of this study were: to evaluate the leaching potential B in a Latossolo Vermelho-Amarelo (Oxisol) as function sources and doses micronutrient; among tested (boric acid, ulexite commercial source H2 Boro), determine one with lowest potential; losses at different each soil layer evaluated; identify chemical physical variables soils that influence leaching. For that, two experiments...

Previous studies on the reproductive toxicity of boric acid have indicated that male rodents suffer testicular atrophy after treatment. There were, however, no studies of the potential effects on female fertility or on the neonate. In addition, no study described the development of the testicular lesion, thought to be related to the mechanism of toxicity. A Reproductive Assessment by Continuous...

The use of attractive toxic sugar baits (ATSB) is a novelty in vector and residential pest control. This study aims to determine the concentration bait that able attract german cockroach Blattela germanica Linnaeus, effectiveness various types substances as an ATSB control cockroaches. method based on behavior adult insects eat sugars from sources contain materials will ultimately kill insects....

Physiologically mature, uniform fruits were thoroughly washed and dipped in aqueous solution of T0 (Untreated fruits), T1 (Boric acid at 200 ppm), T2 300 T3 (NAA 100 T4 T5 (Salicylic 300ppm), T6 400ppm) for five minutes. Fruits placed plastic trays stored ambient storage conditions 12 days. The readings observed after 4rd, 8th 12th Physiological weight loss decreased with storage, further treat...

Laboratory colonies of the ghost ant, Tapinoma melanocephalum (F.) were administered sugar solution (10%) baits containing the insecticides boric acid, fipronil (REGENT), hydramethylnon (SIEGE), or diflubenzuron (DIMILN). Colonies were exposed to the baits for 21 d, and development of workers, queens, and brood (larvae and pupae) was observed for 4 wk. Fipronil (0.05%) caused 100% mortality in ...