Targeting the vector of arboviruses Aedes aegypti with nanoemulsions based on essential oils: a review with focus on larvicidal and repellent properties

• Laryssa Ferreira do Nascimento Silva,
• Douglas Dourado,
• Thayse Silva Medeiros,
• Mariana Alice Gonzaga Gabú,
• Maria Cecilia Queiroga dos Santos,
• Daiane Rodrigues dos Santos,
• Mylena Lemos dos Santos,
• Gabriel Bezerra Faierstein,
• Rosângela Maria Rodrigues Barbosa and
• Fabio Rocha Formiga

Beilstein J. Nanotechnol. 2025, 16, 1894–1913, doi:10.3762/bjnano.16.132

• compounds present in the essential oils of some plant species (such as Cymbopogon excavatus, Mentha piperita, Azadirachta indica, Eucalyptus maculata, and Cymbopogon nardus) [62][66], exhibit, either alone or in synergy, larvicidal, ovicidal, pupicidal, and repellent properties. These characteristics make

• oil presented CL50 of 86.52 µg/mL and CL90 of 134.81 µg/mL after 24 hours, and CL50 of 82.81 µg/mL and CL90 of 128.39 µg/mL after 48 hours. It is noteworthy that the formulation was not tested in non-target organisms. Kaur et al. (2019) developed an optimized nanoemulsion containing Eucalyptus

• fibroblasts (L929) up to concentrations of 400 µg/mL. Finally, Mohammadi and colleagues (2020) evaluated the repellent efficacy of a nanoemulsion containing Mentha piperita and Eucalyptus globulus essential oils against Ae. aegypti [149]. These oils are widely found in tropical and temperate regions and are

Hydrogels and nanogels: effectiveness in dermal applications

• Jéssica da Cruz Ludwig,
• Diana Fortkamp Grigoletto,
• Daniele Fernanda Renzi,
• Wolf-Rainer Abraham,
• Daniel de Paula and
• Najeh Maissar Khalil

Beilstein J. Nanotechnol. 2025, 16, 1216–1233, doi:10.3762/bjnano.16.90

• safety [209]. Nanogels loaded with 5-FU [196][209] and capecitabine [37], when topically applied, can be an interesting strategy to improve chemotherapeutic efficiency in the treatment of skin cancer [168]. Double-walled biodegradable nanogels composed of PLGA–chitosan coated with eucalyptus oil

• efficiently encapsulated 5-FU [196]. The 5-FU was encapsulated in the PLGA core using the solvent evaporation technique. Then, the nanoparticle was coated with cationic chitosan, aiming to promote ionic interactions with the anionic cell membrane of the tumor. Finally, eucalyptus oil (1%) was added to the

• surface of the nanoparticle to favor the penetration of the nanogels into the SC). Both in vitro and ex vivo results showed higher cutaneous penetration of 5-FU performed by double-walled PLGA–chitosan nanogels coated with eucalyptus oil, demonstrating the favorable potential of nanogels in skin cancer

Insect attachment on waxy plant surfaces: the effect of pad contamination by different waxes

• Elena V. Gorb and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2024, 15, 385–395, doi:10.3762/bjnano.15.35

• Eucalyptus nitens (H. Deane & Maiden) Maiden (Myrtaceae) [26] and N. alata [27]. Both earlier and rather recent studies gave direct indications that 3D waxes of the plant species from the genera Brassica (Brassicaceae) [8][28][29] and Nepenthes [30][31][32][33] contaminated insect adhesive pads. Also our

Sulfur nanocomposites with insecticidal effect for the control of Bactericera cockerelli

• Lany S. Araujo-Yépez,
• Juan O. Tigrero-Salas,
• Vicente A. Delgado-Rodríguez,
• Vladimir A. Aguirre-Yela and
• Josué N. Villota-Méndez

Beilstein J. Nanotechnol. 2023, 14, 1106–1115, doi:10.3762/bjnano.14.91

• eucalyptus and rosemary essential oils to determine the insecticidal effect in the control of nymphs of paratrioza (Bactericera cockerelli (Sulc) (Hemiptera: Triozidae)) in potato crops. A solution of thiosulfate was reduced to elemental sulfur, and the sulfur nanoparticles were coated with eucalyptus and

• in the entomology laboratory 24, 48, and 72 h after application. Furthermore, efficacy was compared to the commercial insecticide thiamethoxam (0.25%) and a control. The results show that eucalyptus nanocomposites with oil concentrations of 0.25%, 0.5%, and 0.75% and rosemary nanocomposites with an

• nanocomposites are more effective in controlling nymphs of paratrioza than the commercial insecticide thiamethoxam; thus, they could be used for the development of new insecticides. Keywords: eucalyptus; nanoinsecticide; nanotechnology; Paratrioza control; rosemary; Introduction Paratrioza (Bactericera

Design and characterization of polymeric microneedles containing extracts of Brazilian green propolis

• Camila Felix Vecchi,
• Rafaela Said dos Santos,
• Jéssica Bassi da Silva and
• Marcos Luciano Bruschi

Beilstein J. Nanotechnol. 2022, 13, 503–516, doi:10.3762/bjnano.13.42

• Apis mellifera L. bees, located inside a eucalyptus reserve, surrounded by native forest with predominance of Baccharis dracunculifolia (Asteraceae), in the northwest of Parana state. This research was registered in Brazil with SISGEN N° AC7A2F5. The different PRP extracts were prepared by turbo

Self-assembly of Eucalyptus gunnii wax tubules and pure ß-diketone on HOPG and glass

• Miriam Anna Huth,
• Axel Huth and
• Kerstin Koch

Beilstein J. Nanotechnol. 2021, 12, 939–949, doi:10.3762/bjnano.12.70

• Miriam Anna Huth Axel Huth Kerstin Koch Rhine-Waal University of Applied Sciences, Faculty of Life Sciences, Marie-Curie-Str. 1, 47533 Kleve, Germany 10.3762/bjnano.12.70 Abstract Eucalyptus trees and many plants from the grass family (Poaceae) and the heather family (Ericaceae) have a protective

• that ß-diketone tubules are formed by self-assembly and confirmed that ß-diketone is the shape-determining component for this type of tubules. Keywords: ß-diketone tubules; eucalyptus; plant wax; recrystallization; self-assembly; Introduction The plant cuticle, which is the largest biological

• morphologically different type of wax tubules is unknown. On Eucalyptus gunnii leaves mainly the characteristic ß-diketone tubules are present (Figure 1), but helically wound ribbons and a transitional form between both shapes are also present. Atomic force microscopy investigations of tubule formation on living

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

• Matías Guerrero Correa,
• Fernanda B. Martínez,
• Cristian Patiño Vidal,
• Camilo Streitt,
• Juan Escrig and
• Carol Lopez de Dicastillo

Beilstein J. Nanotechnol. 2020, 11, 1450–1469, doi:10.3762/bjnano.11.129

• photocatalytic, electrochemical, and catalytic properties. Furthermore, NiO NPs exhibit anti-inflammatory properties, generating interest in the biomedical field to use these NPs as antibiotics or in cancer treatments [116][133]. NiO NPs synthesized from Eucalyptus globulus leaf extract showed excellent

Green and energy-efficient methods for the production of metallic nanoparticles

• Mitra Naghdi,
• Mehrdad Taheran,
• Satinder K. Brar,
• M. Verma,
• R. Y. Surampalli and
• J. R. Valero

Beilstein J. Nanotechnol. 2015, 6, 2354–2376, doi:10.3762/bjnano.6.243

• amine groups in the both leaf extracts are accountable for the reduction of Ag+ ions to Ag NPs and the protein portion of leaf extract can play the role of both reducing agent and stabilizer for Ag NPs [45]. Ravindra et al. used aqueous extracts of Eucalyptus citriodora and Ficus bengalensis to produce

• aqueous extract of Lonicera japonica flower as a reducer and a stabilizer at 70 °C for 30–60 min. They obtained spherical, triangular and hexagonal Ag and Au NPs with average sizes of 7.8 and 8.02 nm, respectively [25]. Sulaiman et al. prepared the leaf extract of Eucalyptus chapmaniana (E. chapmaniana

Superhydrophobicity in perfection: the outstanding properties of the lotus leaf

• Hans J. Ensikat,
• Petra Ditsche-Kuru,
• Christoph Neinhuis and
• Wilhelm Barthlott

Beilstein J. Nanotechnol. 2011, 2, 152–161, doi:10.3762/bjnano.2.19

• contact angles between 160 and 163°. Even some species with flat epidermis cells but with a dense layer of epicuticular wax crystals, such as Brassica oleracea or some Eucalyptus species, can exhibit contact angles >160°. Thus, the contact angle alone is not suitable for a differentiated comparison of

• tubules, and (f) Eucalyptus macrocarpa ca. 50 tubules per 10 µm2. The larger spacing between the wax crystals of the other surfaces compared to the lotus upper side is obvious. Chemical composition of the separated waxes of the upper and lower side of the lotus leaf. The upper side wax contains 65% of