The study carries on 50g of lung tissues with pneumoconioses fixed in solution formol at faculty of morbid anatomy of 103 hospital. These tissues has been discovered both qualitative and quantitative by image and chart using electronic microscope X ray diffract method. On electronic microscope, there are amiang fibres with length approximately 1am and its diameter is very small, combining with intensity/energy chart of samples written on XRD machine, these showed that is Clinochyrysolite-Mg3Si205 (OH)4 with content 0,54%. It need to have a method to standardize electronic microscope X ray diffract method to discover, assess amiang (presence of any types on lung tissue) and quantitative samples of in labour environment
Pneumoconiosis ; Lung ; Diseases

CT-2002 air filtering mouth mask Vietnam producted was studied on electronic microscope concerning the structure, the convenience and the efficacy of dust filtering. Results showed that its efficacy reached 85-87% in an air flow of 30 liters/minute but in the flow of 95 liter/minute, the efficacy reduced to 44-46%. The evaluation of efficacy was performed similarly to American and Japanese NIOSH method
Mouth ; Filtration ; air

GINS is Immunoelectromicroscopic technique combined indirect immunolabeling technique and negative staining technique in order to investigate surface antigens of particle specimens, such as virus, bacteria, debris of cell. This applicant investigation carry out on virus of JEV, HbsAg and salmonella. The results proved that samples not only have complete structure but also surface antigens with high specificity
Antigens, Surface ; Viruses ; Bacteria ;

XRD (X Ray powder Diffraction) is an effective analysis method for crystallized materials. This method can identify and reflexes characteristics of asbestos in solid materials clearly based on 3 highest peaks of specific diffraction spectrum from asbestos containing samples. However, asbestos concentration lower than 1% may cause certain biases in analysis. Our study focused on the XRD method for qualitative determination of asbestos in solid material samples in Vietnam environment
Asbestos ; Health ; Environment

Electronic microscopy is essential for virus research and detection. To detect viruses or microorganisms, the study of appearance, dimentions, microstructure, parallel structure (cell, capsid, capsome and spikes), cell outer layer, pore and hair and comparison with the previous ones is vital through electronic microscopy. The advantage of this method is samples taken easily, quick classification, multifactoral causes and fast diagnosis.
Virus Diseases ; Microscopy ; Diagnosis

In the study, indirect immunogold labelling technique was used after embedding on verocells infected by measle virus and on PMK cells infected by rotavirus. According to black particles in immuno-electronic microscopic figure, rotavirus in PMK cells was localized and the formation of measle virus in vero cell was realized. 34. Trần Thanh Dương, Nguyễn Thu Vân, Hoàng Thủy Long: Molecula epidemiology of C hepatitis in hepatitis patients in Hanoi city. Vn J Pract Med 2004; 472(2):17-22:(CIMSI) Epidemiology; Hepatitis C; Fibrosis; Epidemiology, Molecular 323 patients with hepatitis and cirrhosis (244 males, 89 females admitted into the clinical Institute of Tropical diseases from Jan 2001 to August 2002 were studied on. Result showed that: in Hanoi, hepatitis patients were infected with C hepatitis virus of the types 1a, 1b, 6a. The incidence of various HCV genes was not different in deverse age groups, places, occupations, marital status of the patients, but the differences were noted according to the gender, the education level, the history of drug use and blood transfusion.
Antigens ; Cells ; Microscopy, Immunoelectron

Immunoelectronmicroscopic examination was applied largely in the diagnosis of microbioorganism. The technique of indirect immunogolden labelling was used after embedding on vero cell infected with measle virus and on TVP cell infected with rotavirus SA11. By black particles in immunoelectromicroscopic figure, the localization of rotavirus in TVP cell was determinated and the formation of measle virus in vero cell was identified.
Antigens ; cells ; Microscopy, Immunoelectron

Objective: To assess the knowledge and attitude toward coronavirus disease-2019 (COVID-19) among healthcare workers at District 2 Hospital in Ho Chi Minh City (HCMC). Methods: A cross-sectional study was performed between January 2020 and February 2020 at District 2 Hospital. A systematic random sampling strategy was carried out and the data was collected through a self-administered questionnaire of the knowledge and attitude of healthcare workers regarding COVID-19. Descriptive analysis was reported to describe the demographic, mean knowledge and attitude score of healthcare workers. Inferential statistics including t-test, ANOVA and Spearman's correlation were used to evaluate the relationship between study variables. Results: A total of 327 eligible healthcare workers had a mean score of knowledge and attitude of 8.17±1.3 (range 4-10) and 1.86±0.43 (range 1-5), respectively. They showed good knowledge and a positive attitude. However, approximately two thirds of the participants knew the mode of transmission, the isolation period and treatment (67.0%, 65.8%, and 58.4%, respectively), and 82.3% and 79.8%, respectively, held positive attitude regarding the risk of personal and family members getting illness. There was a negative correlation between knowledge scores and attitude scores (r=-0.21, P<0.001). Additionally, healthcare workerspredominately used social media to inform themselves about COVID-19 (91.1%). Conclusions: The majority of healthcare workers had good knowledge and positive attitude toward COVID-19. However, the level of some knowledge and attitude lower than that expected for their position level towards the virus. Additional education interventions and campaigns are required for healthcare workers.