A5010581356- Essential Oils and Antimicrobial Activity
- Traditional and Medicinal Uses of Annonaceae
- Phytochemistry and Biological Activities
- Natural product bioactivities and synthesis
- Phytochemical compounds biological activities
- Ginger and Zingiberaceae research
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Piperaceae Chemical and Biological Studies
- Fungal Biology and Applications
- Phytochemistry and Bioactivity Studies
- Plant chemical constituents analysis
- Phytochemicals and Antioxidant Activities
- Plant and Fungal Species Descriptions
- Alkaloids: synthesis and pharmacology
- Phytochemistry and Bioactive Compounds
- Sesquiterpenes and Asteraceae Studies
- Crystallography and molecular interactions
- Plant-derived Lignans Synthesis and Bioactivity
- Plant biochemistry and biosynthesis
- Bioactive Natural Diterpenoids Research
- Marine Sponges and Natural Products
- Plant Diversity and Evolution
- African Botany and Ecology Studies
- Ethnobotanical and Medicinal Plants Studies
Industrial University of Ho Chi Minh City
2021-2024
Vinh University
2013-2023
Ho Chi Minh City University of Technology
2023
Namangan Engineering Pedagogical Institute
2023
Nukus State Pedagogical Institute named after Ajiniyaz
2023
University of North Sumatra
2023
Namangan State University
2023
Vietnam Academy of Science and Technology
2022-2023
Ministry of Information and Communications
2020
Trường ĐH Nguyễn Tất Thành
2018-2019
Eight new carbazole alkaloids, claulamines C (1), D (2), and E (5) clausenalines B–F (3, 4, 6–8), four coumarins, clausemarins A–D (9–12), 43 known compounds were isolated from the roots of Clausena lansium. The structures established on basis 2D-NMR spectroscopic analysis, their absolute configurations ECD spectra. configuration wampetin was revised as using a NOESY experiment. Most evaluated for potential anti-inflammatory activity. results showed that 9, 13–18, 20–22 exhibited strong...
Phytochemical investigation of the methanolic extract Croton tonkinensis afforded two known kauranes (1, 2), eight new ent-kauranes (3–10), and 16 ent-kaurane-type diterpenoids (12–27). In addition, 30 compounds were identified by comparison their physical spectroscopic data with reported data. Among isolated compounds, ent-18-acetoxykaur-16-en-15-one (20) displayed most significant inhibition superoxide anion generation elastase release.
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...
AbstractZingiber densissimum S.Q.Tong & Y.M.Xia and Kaempferia laotica Gagnep., belong to the Zingiberaceae family, which were found in Vietnam Laos recent years. To date, there has been very limited information on their phytochemical profiles pharmacological activities. The present study was conducted give insights into chemical composition of essential oils isolated from two plants antimicrobial Gas Chromatographic–Mass Spectral (GC-MS) analysis utilized identify rhizome Z. K. laotica....
Abstract This research focuses on the CO 2 capture capacity and physical properties of granulated beads using zeolite ANA synthesized from metakaolin as raw material, which was obtained an alkaline solution for hydrothermal treatment at ambient conditions without any additional sources silica or alumina. The resulting powder then with bentonite to improve mechanical strength sodium alginate perform a cross-linking reaction barium chloride. were characterized by X-ray Diffraction (XRD)...
Mục tiêu: Đánh giá kết quả phẫu thuật cắt phần sau dây thanh bằng dụng cụ hút trong điều trị liệt hai bên tư thế khép. Đối tượng: 21 bệnh nhân được chẩn đoán xác định khép tại Khoa Cấp cứu, Bệnh viện Tai Mũi Họng Trung ương từ tháng 9/2023 đến 8/2024. Phương pháp nghiên cứu: Tiến cứu. Kết quả: Các có mở khí quản trước đó đều rút canuyn ngay mổ vài ngày. Sau 3 tháng, 90,48% hết khó thở và độ rộng môn > 5 mm, 66,67% rối loạn giọng nhẹ hoặc trung bình. luận: Phẫu cho tốt, vừa giải quyết bảo...
The chemical composition of essential oils from four Piper species, retrofractum Vahl., P. boehmeriaefolium (Miq.) C. DC., sarmentosum Roxb., and maclurei Merr., were analysed by gas chromatography-flame ionization detector (GC-FID) chromatography-mass spectrometry (GC-MS). Nineteen to sixty-four compounds representing 92.0%-98.4% the total contents identified in oil samples. major constituents leaf benzyl benzoate (14.4%), myrcene bicycloelemene (9.9%), bicyclogermacrene (7.0%)...
Parvistones A-E (1-5), five new styryllactones possessing a rare α,β-lactone moiety and 6S configuration, were isolated from methanolic extract of Polyalthia parviflora leaves. The structures the absolute configuration isolates elucidated using NMR spectroscopy, specific rotation, circular dichroism, X-ray single-crystal analysis. Compounds 8, 9, 11, 12 for first time. results supported by comparing data measured to those 6R-styryllactones. Moreover, plausible biogenetic pathway compounds...
Monofloral honey samples (Coffea robusta) from Vietnam were determined for their chemical compositions. This is the first report on composition and antioxidant activity of coffee Vietnam. These characterized by high contents total reducing sugars, phenolic contents, flavonoid contents. The seven acids (PAs) quantified performance liquid chromatography (HPLC) analyzed with assistance principle component analysis (PCA) to differentiate into groups. hydroxymethylfurfural (HMF) (0.048-2.933...
The volatile compounds identified from four species of Annona Vietnam are being reported. oils were obtained aliquots plant samples by steam distillation and subjected to GC GC-MS analysis. main glabra L., β-caryophyllene (21.5%) germacrene D (17.7%), α-cadinol (5.4%) β-elemene (5.2%). squamosa comprised mainly α-pinene (1.0-11.9%), limonene (0.8-11.7%), β-cubebene (0.5-13.0%), (11.6-24.5%), spathulenol (0.8-9.0%), caryophyllene oxide (1.0-10.6%) (3.3-7.8%). significant constituents muricata...
Fifty-seven compounds were purified from the stems of Tinospora sinensis, including three new characterized as a lignan (1), pyrrole alkaloid (11), and benzenoid (17), respectively. Their structures elucidated established by various spectroscopic spectrometric analytical methods. Among isolates, fifteen examined for their anti-inflammatory potential in vitro. The results showed that several displayed moderate inhibition N-formyl-methionyl-leucyl-phenylalanine/cytochalasin B (fMLP/CB)-induced...
The investigation on the chemical constituents of whole plant Abutilon indicum has resulted in isolation two new compounds, abutilin A (1) and (R)-N-(1'-methoxycarbonyl-2'-phenylethyl)-4-hydroxybenzamide (2), as well 28 known compounds. structures compounds were established basis spectroscopic analysis, identified by comparison their physical data with those reported literature.
The methanolic extract of Piper lolot, having shown potent inhibitory activity on platelet aggregation induced by arachidonic acid (AA) and activating factor (PAF), was subjected to activity-guided isolation yield twelve new amide alkaloids, piperlotine A–L (1–12), along with twenty-nine known compounds. Their structures were elucidated the basis spectroscopic analysis. isolated compounds tested for their rabbit aggregation. A (1), C (3), D (4), E (5),...
Cytotoxicity-guided phytochemical investigation of a methanolic extract Croton tonkinensis afforded two new kaurane diterpenoids (1, 2) and 10 known ent-kaurane-type (3−12). The structures 1 2 were based on analysis spectroscopic mass spectral data. Compounds 3−12 identified by comparison their physical data with those reported in the literature. Selected compounds from this plant examined for cytotoxic anti-inflammatory activities. 4 9 showed highest activity against tested tumor cell...
The essential oils obtained by hydrodistillation from the leaves of five species Annonaceace grown in Vietnam were analyzed gas chromatography (GC) coupled with mass spectrometry (GC/MS). main constituents Artabotrys hongkongensis Hance sesquiterpenes spathulenol (13.1%), β-caryophyllene (6.6%), γ-elemene (6.3%) and δ-cadinene (6.3%). β-Caryophyllene (12.1%), bicycloelemene (11.2%) bicyclogermacrene (11.6%) predominant components oil Melodorum fruticosum Lour, whereas Polyalthia longifolia...
In the present study, chemical investigation of leaves Annona reticulata has resulted in identification nine compounds, including annonaretin A, (1), a new triterpenoid. The purified compounds were subjected to examination their effects on NO inhibition LPS-activated mouse peritoneal macrophages and most them exhibited significant inhibition, with IC50 values range 48.6 ± 1.2 99.8 0.4 μM.
The leaf oils of some genus Annonaceae collected from Vietnam in December 2009 were analyzed by capillary gas chromatography (GC) and GC coupled with mass spectrometry (GC/MS). major compounds identified the oil Artabotrys pallens Ast. α-gurjunene (21.9%), α-phellandrene (20.1%) bicycloelemene (9.6%). Goniothalamus tamirensis Pierre ex Finet & Gagnep. contained β-selinene (12.3%), bicyclogermacrene (10.9%), caryophyllene oxide (10.4%) (5.6%) abundance. However, β-pinene (33.4%), α-pinene...
Zingiber rubens Roxb., and zerumbet (L.) Smith were collected respectively from Nghe An, Province Ha Tinh, Province,Vietnam. The root essential oils obtained by water distillation analyzed Gas chromatography (GC) coupled with Mass spectrometry (GC-MS). most abundant components of Z. (Z)-citral (30.1%), camphene (9.7%), β-phellandrene (7.5%) 1,8-cineole (7.0%) zingiberene (5.3%). main oil constituents (26.1%), (16.3%), sabinene (14.6%), (7.2%) lavandulyl acetate (6.7%). This species has low...
Vietnam is a country blessed with many medicinal plants widely used as food and for purposes, they contain host of active substances that contribute to health. However, the analysis chemical constituents these plant species has not been subject literature discussion.In this study, compositions essential oils four Hedychium species, obtained by hydrodistillation, were determined means gas chromatography-flame ionization detector (GC-FID) chromatography-mass spectrometry (GC-MS) techniques....
Eight new clausenamides, including three γ-lactams (1-3), four δ-lactams (4-7), and an amide (8), seven known lactams, compounds 9-11, which were purified from natural sources for the first time, characterized leaves of Clausena lansium. Their structures elucidated using spectroscopic methods, absolute configurations determined electronic circular dichroism single-crystal X-ray diffraction analyses with Cu Kα radiation. Compound 2 (50 μM) protected 22.24% cortical neurons against...