The genus Kaempferia (Zingiberaceae) is well-known for its diverse phytochemical constituents and characteristic essential oil. champasakensis was firstly described in 2008 by Chayan Picheansoonthon Supachai Koonterm Champasak province of Southern Laos. To date, little known about components pharmacological activities the plant. In present study, extraction oil from K. leaves as well Gas Chromatography - Mass Spectrometry (GC/MS) profile were investigated. major extracted determined...

The type of material employed in crankshaft production has a great influence on the performance, durability, and product lifespan. There are many types that can be used to manufacture crankshafts, but choosing best one is complicated work. This study carried out select among four commonly deployed types, including 1080 steel, 18CrMo4 4130 S48C steel. Fifteen parameters (criteria) were chosen describe each material. weights criteria determined by three methods, Mean weight method, Entropy...

The aim of the present study was to assess antimicrobial effects naringenin (NRG), luteolin (LUT), myricetin (MCT), and protocatechuic acid (PCA) identified in a Hibiscus rosa sinensis flower against two reference strains five clinical isolates Helicobacter pylori. NRG displayed most growth inhibitory bactericidal activities seven bacterial including six resistant one or several antibiotics, azithromycin (MIC, 16–32 mg/L), erythromycin 32 levofloxacin and/or metronidazole (24–64 followed by...

Abstract BACKGROUND: The repellency to stable fly, Stomoxys calcitrans (L.), of Zanthoxylum piperitum (L.) DC pericarp steam distillate (ZP‐SD), armatum seed oil (ZA‐SO) and their constituents alone or in combination with Calophyllum inophyllum L. nut (CI‐NO), as well six aerosol formulations containing ZP‐SD ZP‐SO CI‐NO, was compared that a synthetic repellent, DEET, using an exposed human hand bioassay. RESULTS: At 0.20 mg cm −2 , treatments resulted 91 68% following 30 60 min exposure...

The repellency to female Stomoxys calcitrans (L.) (Diptera: Muscidae) of 21 essential oils (EOs) alone or in combination with Calophyllum inophyllum L. (Clusiaceae) nut oil (tamanu oil) was examined using an exposed human hand bioassay.Results were compared those commonly used repellent N,N-diethyl-3-methylbenzamide (DEET).In tests six male volunteers at a dose 0.5 mg/cm 2 , patchouli (protection time [PT], 3.67 h) the most effective EO but less active than DEET (4.47 h), as judged by PT...

Utilization of plant resources for treatment Helicobacter pylori infections is one the appealing approaches as rapid emergence antibiotic-resistant strains occurring throughout world. Ethanol extract and its fractions from Hibiscus rosa-sinensis red flower were assessed antibacterial urease inhibitory activities towards forty-three clinical two reference H. pylori. The ethyl acetate fraction exhibited most potent bacteriostatic activity with minimum concentrations (MICs) 0.2-0.25 mg/mL...

The insecticidal constituents of hexane-soluble fraction from a methanolic extract the seeds Myristica fragrans (Myristicaceae) against adult females Blattella germanica (L.) (Dictyoptera: Blattellidae) were analyzed by gas chromatography and chromatography-mass spectrometry. activity 13 seed compounds female B. was examined using filter-paper contact toxicity vapor phase bioassays. Results compared with those other 23 known currently used insecticides: dichlorvos, deltamethrin, permethrin,...

BACKGROUND Insect olfactory organs possess many receptor neurons, which detect different sets of odorants in nature. In order to feed on blood meals, stable flies locate host animals and humans using chemical cues such as 1-octen-3-ol butyric acid. the present study, behavioural electroantennogram (EAG) response patterns repellent volatiles from essential oils (EOs) Zanthoxylum piperitum Z. armatum combination with attractants were investigated. RESULTS Components EOs cuminaldehyde,...

AMA Thanh D, Oanh V, Nguyen H, Ngan L, Hieu T. Phytochemical composition, antioxidant, antibacterial, and enzyme inhibitory activities of organic extracts from flower buds Cleistocalyx operculatus (Roxb.) Merr. et Perry. BioTechnologia. 2024;105(2):137-147. doi:10.5114/bta.2024.139753. APA Thanh, D., Oanh, V., Nguyen, H., Ngan, L., & Hieu, (2024). BioTechnologia, 105(2), 137-147. https://doi.org/10.5114/bta.2024.139753 Chicago Doan Thien, Vo Kieu Hoang Chinh Luong Thi My Tran Trung Hieu....

Abstract The repellency to female Stomoxys calcitrans (L.) (Diptera: Muscidae) of 21 essential oils (EOs) alone or in combination with Calophyllum inophyllum L. (Clusiaceae) nut oil (tamanu oil) was examined using an exposed human hand bioassay. Results were compared those commonly used repellent N,N-diethyl-3-methylbenzamide (DEET). In tests six male volunteers at a dose 0.5 mg/cm2, patchouli (protection time [PT], 3.67 h) the most effective EO but less active than DEET (4.47 h), as judged...

The insecticidal constituents of hexane-soluble fraction from a methanolic extract the seeds Myristica fragrans (Myristicaceae) against adult females Blattella germanica (L.) (Dictyoptera: Blattellidae) were analyzed by gas chromatography and chromatography-mass spectrometry. activity 13 seed compounds female B. was examined using filter-paper contact toxicity vapor phase bioassays. Results compared with those other 23 known currently used insecticides: dichlorvos, deltamethrin, permethrin,...

Zanthoxylum plants (Rutaceae) have drawn attention because they contain insecticidal principles against insects. An assessment was made of the and acetylcholinesterase (AChE) inhibitory activities piperitum steam distillate armatum seed oil, their 28 constituents, eight structurally related compounds female stable fly, Stomoxys calcitrans (L.). Results were compared with those two organophosphorus insecticides chlorpyrifos dichlorvos. Potent fumigant toxicity observed cuminaldehyde, thymol,...

Abstract BACKGROUND Plutella xylostella is one of the most serious insect pests cruciferous crops. This study was conducted to determine toxicity 21 constituents from Lavandula angustifolia essential oil ( LA‐EO ) and another 16 previously known six experimental spray formulations containing (1–6 g L −1 sprays) susceptible KS‐PX pyrethroid‐resistant JJ‐PX P. larvae, as well its endoparasitoid Cotesia glomerata adults. RESULTS Linalool linalool oxide LC 50 = 0.016 mg cm −3 were toxic fumigant...

An assessment was made of the repellency to female stable flies tamanu nut oil fatty acids or their esters alone (each 0.5 mg cm(-2) ) in combination with cuminyl alcohol, cuminaldehyde and α-phellandrene 0.25 ), using an exposed human hand bioassay. Results were compared those synthetic repellent DEET (0.25 ).Based upon protection time (PT) (time first bite fly), oleic acid, linoleic methyl oleate linoleate synergised each monoterpenoid DEET. For example, binary mixture acid alcohol (PT...

Six solvent fractions isolated from flower bud and leaf ethanolic extracts of Cleistocalyx operculatus were analyzed for their phytochemical contents including phenolics, flavonoids, saponins, tannins, alkaloids. Antioxidant activities measured using the ABTS, DPPH, FRAP assays. The results showed that aqueous fraction (BAF) (LAF) rich in phenolic content (768.18 490.74 mg GAE/g dry extract, respectively) exhibited significantly higher antioxidant than other fractions. Flower hexane (BHF)...

Abstract In this work, the volatile components of Erigeron sublyratus essential oils and their anti‐inflammatory cytotoxic activities were investigated for first time. Gas chromatography‐mass spectrometry (GC‐MS) analysis identified 28 in root aerial part oils. The main included cis ‐lachnophyllum ester (53.4–64.2 %), germacrene D (5.6–8.6 trans ‐β‐ocimene (2.6–7.5 β ‐caryophyllene (4.7–6.8 ‐myrcene (2.0–6.3 ( E )‐ ‐farnesene (4.8–5.0 %). oil inhibited nitric oxide (NO) production on...

Main chemical compositions of essential oil (EO) from Litsea cubeba fruit collected in Kon Tum Province Vietnam were geranial (32.0%), neral (24.3%), citronellal (14.2%), and limonene (10.1%). Twenty-four compounds the EO identified compared with those EOs previously reported India, China, Malaysia. Minimal inhibitory bactericidal concentrations (MIC MBC) indicated that induced high levels growth inhibition moderate activity against seven test Helicobacter pylori strains, including six...

Helicobacter pylori is one of the most common human infectious bacteria. The infection highly associated with a number important disease upper gastrointestinal tract, including gastritis, duodenitis, peptic ulceration, and gastric cancer. In addition, widespread use antimicrobial agents has resulted in development antibiotic resistance. Metabolites plants, particularly higher have been suggested as alternative potential sources for antibacterial products due to their safe. This study aimed...