Ecologically acceptable usage of derivatives of essential oil of sweet basil, Ocimum basilicum, as antifeedants against larvae of the gypsy moth, Lymantria dispar

Ethanol solutions of five fractions obtained from essential oil of sweet basil Ocimum basilicum L. (Lamiales: Lamiaceae) (F1-F5) were tested for their antifeedant properties against 2nd instar gypsy moth larvae, Lymantria dispar L. (Lepidoptera: Lymantriidae), in laboratory non-choice and feeding-choice experiments. Prior to bioassays, the chemical composition of each fraction was determined by gas chromatography analyses. Significant larval deterrence from feeding was achieved by application of tested solutions to fresh leaves of the host plant. The most effective were F1 (0.5%), F4 (0.05, 0.1, and 0.5%), and F5 (0.1 and 0.5%), which provided an antifeedant index > 80% after five days. A low rate of larval mortality was observed in no-choice bioassay. In situ screening of chlorophyll fluorescence as an indicator of plant stress level (assessed by the induced fluorometry) confirmed that the tested compounds did not cause alternations in the photosynthetic efficiency of treated leaves

Mogućnost adsorpcije mikotoksina (aflatoksin M1 i M2) u jogurtu adsorbentima na bazi prirodnog i modifikovanog zeolita

Ways of milk contamination with mycotoxins, harmful effects of mycotoxins, as well as the possibilities for decontamination of mycotoxin contaminated milk are presented in this paper. The research results of efficacy of absorption of aflatoxins M1 and M2 in yogurt by natural and modified zeolite (clinoptilolite) are presented. In laboratory conditions, two amounts of both absorbents (0,2 and 0,6%), with and without addition of sodium caseinate were applied. It was determined that both absorbents had high efficiency for aflatoxin M1 and M2 absorption. The efficiency was higher without addition of sodium caseinate, and absorption of both aflatoxins was slightly higher on modified zeolite. Compared with lower amount of absorbents (0,2%), the higher amount of both adsorbents (0,6%) showed higher adsorption of aflatoxin M1 and M2. The sedimentation of absorbents in yogurt was not observed. The constant control, the prevention of contamination of milk with mycotoxins during the production proccess, together with utilization of absorbents, may be the an alternative way of food protection against the harmful effects of mycotoxins.U radu je dat prikaz rezultata ispitivanja efikasnosti adsorpcije aflatoksina M1 i M2 u jogurtu korišćenjem prirodnog i modifikovanog zeolita (klinoptilolita). Ispitivane su dve doze prirodnog i modifikovanog zeolita (0, 2 i 0, 6 %) sa i bez dodatka natrijum kazeinata. Utvrđeno je da oba adsorbenta imaju visok stepen adsorpcije aflatoksina M1 i M2 u jogurtu. Njihova efikasnost je bila veća bez dodatka natrijum kazeinata, pri čemu je modifikovani zeolit dao povoljnije rezultate (>80%). Povećana doza (0,6 %) oba adsorbenata u odnosu na manju dozu (0,2%) imala je i veću efikasnost adsorpcije aflatoksina M1 i M2. Nisu primećeni tragovi taloženja adsorbenta u jogurtu. Dalje ispitivanje i usavršavanje ovog postupka adsorpcije može da doprinese većem izboru alternativnih rešenja u zaštiti potrošača od mikotoksina

Supplementary data for article: Novaković, M. M.; Stanković, M.; Vučković, I. M.; Todorović, N.; Trifunović, S. S.; Tešević, V.; Vajs, V.; Milosavljević, S. M. Diarylheptanoids from Alnus Glutinosa Bark and Their Chemoprotective Effect on Human Lymphocytes DNA. Planta Medica 2013, 79 (6), 499–505. https://doi.org/10.1055/s-0032-1328301

Supporting information for: [https://doi.org/10.1055/s-0032-1328301]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/1630

Cuticular chemoprofile of the fruit fly drosophila subobscura (diptera, drosophilidae)

In insects, cuticular hydrocarbon (CHC) profile is involved in many important biological functions and may vary in different conditions. Among fruit fly species, Drosophila subobscura is one of the most frequently used in genetic, ecological and evolutionary research, because of its rich chromosomal polymorphism, specific behavioral repertoires and habitat preferences. In this work, we identified and quantified cuticular chemoprofile of D. subobscura. Using gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC-MS), 25 chemical compounds were found in males and 23 compounds were found in females. Further, ANOVA confirmed significant sexual dimorphism in cuticular chemoprofile amounts. Knowledge of cuticular chemistry could contribute to further research in D. subobscura, starting from behavioral, up to ecological, since this species is recognized as an important model system for the study and monitoring of global climate changes

Supplementary data for article: Novaković, M. M.; Stanković, M.; Vučković, I. M.; Todorović, N.; Trifunović, S. S.; Tešević, V.; Vajs, V.; Milosavljević, S. M. Diarylheptanoids from Alnus Glutinosa Bark and Their Chemoprotective Effect on Human Lymphocytes DNA. Planta Medica 2013, 79 (6), 499–505. https://doi.org/10.1055/s-0032-1328301

Supporting information for: [https://doi.org/10.1055/s-0032-1328301]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/1630

Cuticular chemoprofile of the fruit fly drosophila subobscura (diptera, drosophilidae)

In insects, cuticular hydrocarbon (CHC) profile is involved in many important biological functions and may vary in different conditions. Among fruit fly species, Drosophila subobscura is one of the most frequently used in genetic, ecological and evolutionary research, because of its rich chromosomal polymorphism, specific behavioral repertoires and habitat preferences. In this work, we identified and quantified cuticular chemoprofile of D. subobscura. Using gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC-MS), 25 chemical compounds were found in males and 23 compounds were found in females. Further, ANOVA confirmed significant sexual dimorphism in cuticular chemoprofile amounts. Knowledge of cuticular chemistry could contribute to further research in D. subobscura, starting from behavioral, up to ecological, since this species is recognized as an important model system for the study and monitoring of global climate changes

Opial inequality in q-calculus

Abstract In this article we give q-analogs of the Opial inequality for q-decreasing functions. Using a closed form of the restricted q-integral (see Gauchman in Comput. Math. Appl. 47:281–300, 2004), we establish a new integral inequality of the q-Opial type

On the Summation of Series Involving Bessel or Struve Functions

AbstractThe subject called “summation of series” can be viewed in two different ways. From one point of view, it means numerical summation which involves acceleration of convergence, and from the other, it represents a variety of summation formulas which are considered important, but which are often not useful. The aim of this paper is to produce a compromise between the two opposite approaches when series of Bessel or Struve functions are considered. The proposed method leads to series of Riemann zeta and related functions which converge much faster than the originals. In the most significant cases, closed-form formulas were obtained

Developmental and feeding alternations in Leptinotarsa decemlineata say. (Coleoptera : Chrysomelidae) caused by Salvia officinalis L. (Lamiaceae) essential oil

Secondary plant metabolites can express the regulatory effects on development and survival of other plant species, microorganisms or animals. In this study, we investigated the toxic and antifeedant effect of ethanol solutions of derivatives obtained from sage (the essential oil, five fractions of the same oil F1 -F5, and the camphor) against the second instar larvae and adults of Colorado potato beetle (CPB). The bioassays were performed in laboratory conditions. Toxicity of tested solutions was negligible; with exception of S. officinalis essential oil which caused low mortality of insect (29.16% dead larvae and 20.83% dead adults, respectively). Alternations in development evaluated as number in both laid eggs and hatched larvae were insignificant. Antifeedant activity of tested solutions against the CPB larvae during the first 96h was significant; although their effectiveness decreased after 4 days, the LAM was still lesser in comparing with untreated control