1.Chemical composition of essential oil of Shang. in Vietnam
Pharmaceutical Journal 2001;298(2):8-9
Schefflera aff. crassibracteata is a shrub 6 high, leaflets 6-12. It is distributed in HoaBinh, NinhBinh, PhuKhanh provinces. The oil yield from leaves was 0.24% by air-dry material. The essential oil was analysed by HRGC and GC/MS, 61 constituents have been identified. Major components were: caryophyllen oxide (12.1%); -pinene (8.9%); -pinen (4.8%) and T-muurolol (4.7%).
Chemistry
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Oils, Volatile
2.Chemical components of aromatic oil from branches with leaves and flower of com-ruou (glycosmis pentaphylla (Retz.), Corr in Vietnam.
Pharmaceutical Journal 1999;282(10):12-14
Glycosmis pentaphylla is a shrub 4-5m high, leaflets 2-5, white flower, fruit around. It is distributed in edge of forest in North midland area of Vietnam. The oil yield was 0.3% from branch with leaves and flower by air-dry material. The essential oil of Glycosmis pentaphylla was analyzed by GC/MS, 88 constituents have been identified. Major constituents were: alpha-pipene (27.1%); beta-caryophyllene (10.3%); spathulenol (7.7%); caryophyllen oxid (7.3%) and aromadendren 6.4%.
Chemicals and Ingredients
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oils
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Plants, Medicinal
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Medicine, Traditional
3.Chemical composition of Atalantia roxburghiana oil collected from Me Linh, Vinh Phuc
Pharmaceutical Journal 2003;0(6):189-190
The qualitative and quantitative analyses of Atalantia roxburghiana Hook. f. essential oil, using gas chromatography – mass spectrum method, were described. The essential oil content calculated on air dried leaves and fruits was 0.09%. The main constituents among 30 compounds identified in the oil were: para-cymene (13.37%), gamma-terpinene (40.63%), limonene (4.58%), and beta-pinene (4.59%).
Chemistry
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Plants
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Plants, Medicinal
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oils
4.Resources of herbal plants with aromatic oil at the biodiversity station of Ngoc Thanh commune, Me Linh district, Vinh Phuc province
Pharmaceutical Journal 1999;282(10):8-10
After preliminary study we have collected 35 species bearing essential oil belong botanical families. The oil yield of 21 species, chemical composition of 7 species among them 6 species first time was studied in detail in Vietnam such as : Liquidambar formosana, Neolitsea sp., Clausena aff. excavata, Euodia lepta, Glucosmis pentaphylla, Zanthoxylum avicennia were determined
Modernization of traditional drugs of ethnic minorities in Vietnam
5.The chemical coposition of zanthoxylum nitidum essential oil in Vietnam
Journal of Medicinal Materials - Hanoi 2004;9(5):159-160
Study on chemical coposition of essential oil from Zanthoxylum nitidum fruit collected at Me Linh district, Vinh Phuc province by GC/MS method. Results: the yield of essential oil from fruit was 0.35% by air-dry material, 27 constituents were identified, in which the main constituents were linalool L. (72.17%) and sabinen (11.24%)
chemistry
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Oils, Volatile
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Zanthoxylum
6.Chemical components of essential oil extracted from fruit of Zanthoxylum rhetsa (Roxb.). DC in Vietnam
Pharmaceutical Journal 2004;0(10):12-13
The determination of the contents and chemical components essential oil of Sen hoi (Zanthixylum rhetsa Roxl DC) collected in Mai Chau, Hoa Binh provine in Feb 2003 showed that the essential oil content reached 9,6% of dry product and 24 compouds was identified, among then the main compounds are benzen derivatives, 1- methoxy-4 (1- propenyl), benzaldehyd-4-methoxy, 1-butanon, 1- (4- hydroxy phemyl) and benzen-e,ethanol, alpha-ethyl-4-4 methoxy
Chemistry
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Oils, volatile
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Zanthoxylum
7.Chemical components of essential oil from the part above the ground of Limnophyla rugosa (Roth) Merr. In Vietnam
Pharmaceutical Journal 2003;328(8):14-15
Limnophyla rugosa is an erect-semi aquatic, fragrant, annual herb, up to 50 cm tall. Stem simple or branch, glabrous to hirsute, rooting from the lower nodes, leaves decussate, ovate-lanceolate to oval elliptical 2-8cmx1-5 cm, flowers solitary in axillary; sometimes in axillary pendunculate clusters with up to 7 sessile. Limnophyla rogusa occurs in moist along treams,pools and rice field from sea-level up to 1500 m attitude. Yield of essential oil from aerial parts of Limnophyla rogusa was 0.18 percent by air-dry material, 23 constituents of the essential oil were identified by GC/MS. Major constituent of essential oil was anethol (89.4%)
Oils, Volatile
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oils
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Chemistry
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Plants
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Medicine, Traditional
8.Chemical composition of flower essential oil of Desmos chinensis Lour. from Vietnam
Pharmaceutical Journal 2003;321(1):23-24
Desmos chinensis is a climber tree. Branches brown pubescent, leaves glaucous underneath, petals yellow. This tree distributes in many provinces of Viet Nam, mostly in Yen Bai, Ha Giang, Thai Nguyen, Bac Giang, Vinh Phuc, Quang Ninh, Hoa Binh, Ninh Binh, Quang Binh, Ha Tinh, Thua Thien Hue, Kontum, Dong Nai. The oil yield was 0.2% from air-dried flowers. The essential oil of Desmos chinensis was analysed using GS and RMN. 13 constituents have been identified, including beta-caryophyllene (28.9%), bicyclogermacren (11.5%), alpha-humullene (7.2%), D-germacren (7.2%), beta-elemene (6.4%)
chemistry
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Flowers
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Oils
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Oils, Volatile
9.Study Design for the 2016 Baseline Survey of a Health System Strengthening Project in Quoc Oai District, Hanoi, Vietnam
Van Minh HOANG ; Juhwan OH ; Bao Ngoc NGUYEN ; Le Minh DAT ; Jong Koo LEE ; Thi Giang Huong TRAN ; Van Huy NGUYEN ; Seung Pyo LEE ; Kyung Sook BANG ; Youngtae CHO ; Sun Young KIM ; Hwa Young LEE ; Quang Cuong LE ; Narshil CHOI ; Thai Son DINH ; Ngoc Hoat LUU
Journal of Korean Medical Science 2019;34(5):e42-
BACKGROUND: In order to provide essential scientific evidence on the population's health status and social health determinants as well as the current capacity of the health care system in Vietnam to health policy makers and managers, Vietnam Ministry of Health, Hanoi University of Public Health, Hanoi Medical University, and Ho Chi Minh University of Medicine and Pharmacy collaborated with Seoul National University (Korea) and conducted a health system survey in the Quoc Oai district (of Hanoi capital) that represented northern rural Vietnam. METHODS: The study design was a cross-sectional study. The survey covered different topics (more than 200 questions) and was administered in three separate questionnaires: 1) Basic information of all household members; 2) Household characteristics; and 3) Individual characteristics. Socio-demographic characteristics among the households and individuals were collected from 2,400 households sampled by multi-stage cluster sampling method: more than 200 questions. RESULTS: The household size of Quoc Oai was larger than the national average and there was no significant difference in gender composition. In addition, the proportions of pre-elderly, age 55–64, and elderly group (65 years old and over) were higher than the national population statistics. In this context, demographic transition has begun in Quoc Oai. CONCLUSION: This study design description provides the basic information about a baseline survey of a future prospective cohort (as a part of a collaborative project on strengthening the health system in Vietnam) to the prospective data user of this survey.
Aged
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Cohort Studies
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Cross-Sectional Studies
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Delivery of Health Care
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Family Characteristics
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Health Policy
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Humans
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Methods
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Pharmacy
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Population Characteristics
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Population Dynamics
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Prospective Studies
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Public Health
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Seoul
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Surveys and Questionnaires
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Vietnam
10.Re-positive testing, clinical evolution and clearance of infection: results from COVID-19 cases in isolation in Viet Nam
Ngoc-Anh Hoang ; Thai Quang Pham ; Ha-Linh Quach ; Khanh Cong Nguyen ; Samantha Colquhoun ; Stephen Lambert ; Huy Luong Duong ; Dai Quang Tran ; Cong Dinh Phung ; Nhu Duong Tran ; Duy Nghia Ngu ; Anh Tu Tran ; Hue Bich Thi Nguyen ; Duc-Anh Dang ; Florian Vogt
Western Pacific Surveillance and Response 2021;12(4):82-92
Objectives:
Asymptomatic infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and test re-positivity after a negative test have raised concerns about the ability to effectively control the coronavirus disease 2019 (COVID-19) pandemic. We aimed to investigate the prevalence of COVID-19 asymptomatic and pre-symptomatic infections during the second wave of COVID-19 in Viet Nam, and to better understand the duration of SARS-CoV-2 infection and the dynamics between the evolution of clinical symptoms and SARS-CoV-2 test positivity among confirmed COVID-19 cases.
Methods:
We conducted a cohort analysis on the first 50 confirmed cases during the second COVID-19 wave in Viet Nam using clinical, laboratory and epidemiological data collected from 9 March to 30 April 2020. Kaplan-Meier estimates were used to assess time to clearance of SARS-CoV-2 infection, and log-rank tests were used to explore factors related to time to SARS-CoV-2 infection clearance.
Results:
Most cases (58%) had no typical signs or symptoms of COVID-19 at the time of diagnosis. Ten cases (20%) were re-positive for SARS-CoV-2 during infection. Eight cases (16%) experienced COVID-19 symptoms after testing negative for SARS-CoV-2. The median duration from symptom onset until clearance of infection was 14 days (range: 6–31); it was longer in re-positive and older patients and those with pre-existing conditions.
Conclusion
Asymptomatic and pre-symptomatic infections were common during the second wave of COVID-19 in Viet Nam. Re-positivity was frequent during hospitalization and led to a long duration of SARS-CoV-2 infection.