The samples of dental deposit plaque collected from 30 people in the faculty of Natural Science were stained by Gram technique. A bacterial prosperious component was detected including Gram (+) cocci, Gram (-) cocci, red and thin cell, red and long cell, straight and curved Gram (-) cells, thin spinal cells … Microorganism population on the deposit plaque under the gun includes bacteria, cocci, and spirochaetes. 3 genera were determined including Streptococcus, Lactobacillus and Actinomyces, with a highest incidence of Streptococcus. The representative genus has the characteristic similar to Streptococcus mutans and it seems that it plays an important role leading to caries
Dental Plaque ; Bacteria ; Dental Care

Which component of polyphenol of Garcinia mangostana L effecting on S. mutans GS-5 causing tooth decay was studied. The materials: the microorganism strain Streptococus mutans GS-5 of America. The method: compounds of polyphenol were isolated by thin layer chromatography method. To measure the pH reduction in glycolysis. The result: Using thin layer chromatography on silicagen was isolated 15 bands of flavonoid from the extract of mangostana. The flavonoid component corresponding with Rf 0,80; Rf 0,86 and Rf 0,91 can strongly inhibit the acid production of S.mutans GS-5
Pharmaceutical Preparations ; Flavonoids ; Streptococcus mutans

Mentha piperita L.Mentha piperita L. was collected from Sapa, Lao Cai province and cultivated at Co Nhue – Tu Liem – Ha Noi. The content of the essential oil in fresh branches of this peppermint was about 0.16%. Its green yield is 1.85-2.10 Kg/m2. First time in Vietnam, the chemical composition of peppermint oil was analyzed by GC/MS and 43 constituents were identified. The main constituents were L-menthol (47.60%), menthol (24.10%), menthofuran (6.07%) and 1.8 cineol (5.55%), pulegone (4.22%). Base on these data. The quality of Sa Pa peppermint oil is good as one from native origin. Peppermint collected from Sa Pa enrich the gene source of medicinal plant in general and particularly the gene source of essential oil plant group of Vietnam
Oils, Volatile ; Chemistry ; Plants

This randomized, placebo-controlled clinical study evaluated the efficacy of lamivudine in 44 Vietnamese patients with histologically documented chronic hepatitis B for one-year. The patients were randomly assigned to receive 100 mg of lamivudine (22 patients) orally once daily or placebo (22 patients). The patients underwent liver biopsies before entering the study and after completing the assigned treatment regimen. At the end of therapy, the percentage of serum HBVDNA negativation was higher in the lamivudine group (86.4%) than in the control group (22% P<0.05). The rate of HBe/antiHBe seroconversion was statistically different between 2 groups (35.2% in the lamivudine group compared to 12.5% in the controls). 95.5% of the patients received lamivudine had normal alanine aminotransferase levels (versus 18.2% in the placebo). Median change in HAI score was >2 points of improvement versus placebo. Lamivudine is less side effects, safety, and favorable
Hepatitis B, Chronic ; Lamivudine ; Hepatitis B ; Therapeutics ; drugs

This paper presented a study on the dynamic of essential oil accumulation in Japanese mint SK33 (M. arrvensis L.) and the influence of storage time on its quantity and quality. This mint was cultivated at Co Nhue experimental station, Tu Liem district, Ha Noi City between 2000 and 2002. The results showed that during the vegetation and development process, the essential oil content in the plant gradually increased and achieved maximum at first branch flowering stage and reduced to minimum at the end of flowering stage. The menthol content in essential oil of Japanese mint SK33 reached the highest value at full flowering stage (81.79%). The best harvest time for this mint is from the beginning flowering stage to full flowering period. After harvesting the whole plants can be stored during 20 days without the change in content and quality of essential oil
oils ; Conservation of Natural Resources ; Oils, Volatile

44 patients of chronic B hepatitis are divided into two groups of 22 patients. The one is treated with lamivudine (Jefflix) 100 mg daily in 12 months continuously and the other with usual vitamin and liver tonics. Results showed in 72.7% patients of lamivudine group, the indices of histological activities were improved (through Knodell score), while in controlled group – 31.8% and over the half of this group these indices worsened. Thus, lamivudine has got good effect
Histological Techniques ; Hepatitis B ; Patients ; Lamivudine ; drugs ; Therapeutics

In order to manage and safely and rationally use the drug, the Ministry of Health promulgates the regulations for management of toxic drug, stupefacients and psychotrope such as the toxic drug regulation accopanying the Dicision No 278BYT-QD; The addictive drug regulation and the list of addictive drug; the psychotic drug regulation and list of psychotropes. Concurrently, there have many texts of government, criminal law, inter-ministry circular letter, decree of president, the programs of ministry of health.
Pharmaceutical Preparations ; Drug Toxicity

Among adverse drug reactions, the anaphylactic shock is most severe and easily causes death. The cause of anaphylactic shock can be drugs (especially antibiotics), intravenous solution, and allergy, poison and microbial, the data of the anaphylactic shock in hospitals throughout the country has been reported. In order to limit the adverse drug reactions, it should know the medical history as well as have ready the drugs and equipment for timely management.
adverse effects ; hospitals

This paper presents the study on Japanese mint SK-33 (M.arvensis L.) and its essential oil. After 3 years cultivated and observed this mint at CoNhue - TuLiem-Hanoi, we have some following notes: its essential oil content at full flowering stage is about 0.64-0.71% in fresh aerial part of plants, 1.38-1.55% in fresh leaves and flowers, 5.13-5.29% in absolute dry leaves and flowers. The chemical composition of this oil was analyzed by GC/MS, 32 constituents were identified. The main constituents are menthol (81.79%), menthone (7.86%), isomenthone (4.95%). Japanese mint SK-33 has rather high content of essential oil, good quality and can create a large quantity of underground stems. It is prospective new mint form for cultivation at large area in our country.
Plants, Medicinal ; Oils, Volatile

Berberine and Palmatine were extracted from the powdered Huong Lien pills with a mixture of methanol and hydrochloric acid (100:1) and subjected to HPLC to simultaneously determine the alkaloids. The HPLC technique was carried out on a Lichrosorb RP-8 (10 m, 250x4 mm) column using a UV detector at =345 nm and a mixture of 3,4g potassium dihydrogen phosphate and 1,7g sodium lauryl sulfate dissolved in 1000 ml of water-acetonitrile (1:1) as a mobile phase. The experimental results proved that the proposed HPLC method was rapid, specific, accurate and precise.
Berberine ; Medicine, Traditional ; Chromatography, High Pressure Liquid ; Biochemistry ; Berberine Alkaloids