Binh Phuoc Research Articles

Depositional environment of clastic sedimentary rocks in Viet Phuong mine at Loc Thanh ward, Loc Ninh district, Binh Phuoc province

After the last Permian formation of limestone, the Southeast region of Viet Nam was covered with a series of clastic sedimentary rocks of Triassic (Vu Khuc, 2000). This region was classified with the sequential rhythm from coarse to fine, including conglomerate, sandstone, and claystone. According to some previous research, this series of sediments belonged to a molasse facies, the marine sedimentary facies characterized by claystone, siltstone containing lime, arranging in rhythm with conglomerate and sandstone (greywacke, arkose). This paper aimed to more precisely elucidate the sedimentary environment of this debris set, Viet Phuong mine. Regarding the texture of sedimentary rocks (Folk, 1974), the sediment was in the sub-mature stage, the moderate sortting (So = 1.15), the particle shape was nearly square, the kurtosis was from -0.19 to +0.4. For tidal environment, sedimentary structures also contributed to the above theory with the characteristic structures of hering-bone cross stratification, convoluted, Convolute Bedding and Flame structures and the presence of Ichnofacies Asterosoma (Cruziana) and Diplocraterion (Skolithos)…Thus, the sediment of Viet Phuong mine was identified with two types of depositional environments: estuary and tide dominated delta from bottom to top.

Some solutions for socio - economic development in the current period - a case study in Binh Phuoc province, Vietnam

Some solutions for socio - economic development in the current period - a case study in Binh Phuoc province, Vietnam

Effect of low-frequency tapping systems (d5; d6) on latex yield, labor productivity and latex physiological parameters on RRIV 106 clone

The tapping labor shortage has been identified as a major issue for natural rubber companies in Vietnam. This study aimed to determine a suitable tapping system to adapt to the labor shortage. The experiment was conducted on RRIV 106 clone at Dong Phu rubber company, Binh Phuoc province, Vietnam in two the tapping years 2018 and 2019. The results showed that the treatments of low-frequency tapping systems (d5, d6) increased individual yield per tree per tapping (g/t/t) compared with that of d4. The g/t/t of treatments d5 and d6 with latex stimulant (ET 2.5%) applied by 6 to 10 times per year (d5, ET.6/y; d5, ET.8/y; d6, ET.8/y; d6, ET.10/y) was 23; 27; 45 and 47% higher than that of the control (d4, ET.4/y), respectively. Labor productivity (kg/task/day) of low-frequency tapping systems increased similarly to g/t/t. The tapper requirements of low tapping frequency (d5 and d6) were 20% and 33% lower than that of d4, respectively. Land productivity per year (kg/ha/year) of low-frequency tapping systems (d5 and d6) was equivalent (98 to 101%) as compared with that of the control. The effects of tapping systems on latex physiological parameters, tapping panel dryness rate (TPD), and dry rubber content (DRC, %) were not significantly different.

A new skink of the genus Scincella Mittleman, 1950 (Squamata: Scincidae) from southern Vietnam.

A new skink of the genus Scincella Mittleman, 1950, from Binh Phuoc Province, southern Vietnam is described based on morphological data, including hemipenial characters, and nucleotide sequences from COI. The following morphological characters diagnose Scincella baraensis sp. nov.: relatively small size in adults (snout-vent length up to 49.2 mm); when limbs adpressed, toes do not or just reach fingers; 30 smooth midbody scale rows and dorsal scales not enlarged; 66-70 paravertebral scales; 64-66 ventral scale rows; 7 supralabials, the fifth and sixth below the center of the eye; enlarged temporal scales 1+2; nuchals present; ear with small auricular lobules; 18-20 smooth lamellae beneath toe IV; hemipenis smooth, short, and unforked; dorsum with faint black dots. The new species differs from its congeners by an uncorrected p-distance in COI sequences of at least 16.2%.

Sự hài lòng của người bệnh nội trú về dịch vụ khám chữa bệnh và một số yếu tố liên quan tại Bệnh viện Hoàn Mỹ Bình Phước năm 2019

In health administration, the satisfaction of patients is an important factor that need to be achieved by health facilities. This cross-sectional analytical study aims to fulfill two objectives: (1) To describe the satisfaction among inpatients, and (2) To identify some related factors to the satisfaction of inpatients at Hoan My Binh Phuong Hospital. The study took place between April and October 2019 on 300 inpatients and used a questionnaire designed by Hoan My Medical Group based on the Ministry of Health’s satisfaction form. The research results show that the average satisfaction rate of the medical service at Hoan My Binh Phuoc Hospital is 92.27%. The satisfaction of patients on medical examination and treatment is the highest at 96.55%; followed by satisfaction on the time to use the services in the hospital at 94.62%; the satisfaction rate on service attitude of medical staff is 90.96% and on the facilities is the lowest at 86.75%. The study also found that the number of hospitalizations treated in the past 12 months the associated factor to the satisfaction of patients. Key words: satisfaction, inpatient, diagnosis and treatment service.

Phenolic compounds from the leaves of Ricinus communis Linn.

Introduction: Ricinus communis Linn. (Castor oil plant) is a monotypic species of Ricinus genus (Euphorbiaceae) and widely distributed in all tropical countries. Phytochemical data of this plant are scarce. As part of ongoing research on a survey of Vietnamese medicinal plants, the investigation of this plant was performed. The isolation and structural determination of five phenolic compounds isolated from the leaves of R. communis Linn. growing in Binh Phuoc province were addressed.
 Method: The dried power of R. communis Linn. leaves was macerated in ethanol to afford the crude extract, which was then separated by liquid-liquid extraction with n-hexane, chloroform, and ethyl acetate, respectively to obtain the corresponding extracts. These extracts were applied to multiple silica gel column chromatography and thin-layer chromatography to yield five compounds. Their chemical structures were determined by spectroscopic methods and by comparison of NMR data with literature values. Antioxidant evaluation of 1 was carried out using 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) free radical scavenging assay.
 Results: Five phenolic compounds, including one coumarinolignan cleomiscosin A (1), two flavonol glycosides kaempferol-3-O-β-D-glucopyranoside (2) and kaempferol-3-O-β-D-xylopyranoside (3), and two aromatic acids gallic acid (4) and vanillic acid (5) were identified.
 Conclusion: Compound 1 was determined for the first time in Ricinus genus and exhibited weak DPPH radical scavenging activity with an SC50 value of 403.23 μg/mL.

Screening of endophytes from rubber trees (hevea brasiliensis) for biological control of Corticium salmonicolor

28 leaves and living-tissue samples of rubber tree (Hevea brasiliensis) were collected from Ho Chi Minh City, Binh Phuoc province and Binh Duong province (Viet Nam). We isolated and screened endophytes that have potential application as agents for biocontrol of Corticium salmonicolor, the agent of Pink Disease in rubber trees. As a result, 21 strains of endophytic bacteria and 14 strains of endophytic fungi were isolated. Antagonistic activity of the endophytes towards C. salmonicolor was checked by using a dual culture. Testing results showed that: T9, T15 and T16 strains have inhibited C. salmonicolor. T9 and T16 strains showed result that 100% of inhibiting C. salmonicolor at the concentration of 1:1. In the test of ability to kill C. salmonicolor, T9 and T16 strains showed that they could kill C. salmonicolor
 after 3 sprays of bacterial filtrate. T9 and T6 strains, which were identified by biochemical methods, have similar characteristics to Bacillus thuringiensis.

High-Performance Liquid Chromatography with Diode Array Detection for the Simultaneous Quantification of Piperaquine and Mefloquine in Human Plasma in Vietnamese Uncomplicated Malaria Patients

A bioanalytical method using high-performance liquid chromatography with diode array detection was developed and validated for quantification of piperaquine and mefloquine in human plasma. After extraction from 200 μL of plasma by using solid phase extraction on MCX-96 well plate; piperaquine, mefloquine and quinine (internal standard) were separated using a mobile phase consisting of trichloroacetic acid 1 mM and trimethylamine 0.025%, pH 3.4-Acetonitrile applying gradient elution on a Poroshell 120, C8 end capped 100 × 4.6 mm, 2.7 μm column at a flow rate of 1.0 mL/min at 35°C. The peaks were monitored with a diode array detection set at a wavelength of 343 nm for piperaquine, quinine and 283 nm for mefloquine. The limit of quantification was 10 ng/mL, 50 ng/ mL for piperaquine and mefloquine, respectively. The method was linear over the range of 10 to 2,000 ng/ml for piperaquine and 50 to 10,000 ng/ml for mefloquine in plasma. The intra, inter assay precision were less than 8% overall quality control ranges for these analytes. The accuracies varied between 99.85% and 104.6% at all quality control levels for piperaquine and mefloquine. The validated method was applied to measure the concentrations of piperaquine, mefloquine in samples collected from 12 uncomplicated malaria patients in Binh Phuoc province, Vietnam.

Assessing drought from satellite data to support agricultural production

Drought is one of the disasters causing the problems to the economy and social life of people, especially where agriculture is the main source of income. The paper presents the results of studying the application of optical satellite images to investigate the drought situation for the southern part of Binh Phuoc province for perennial cropland, the main agricultural crop of the province. The image used is Landsat 8 of the dry season month 2015. The method of drought assessment is based on the relationship of surface temperature, and the Normalization Difference Vegetation Index (NDVI) integrated into the Temperature-Vegetation Dryness Index TVDI. In particular, the NDVI index is determined from the red and near-infrared bands, and the surface temperature is determined from the thermal infrared band of Landsat 8 images. The results show that the whole area of southern Binh Phuoc has drought area accounting for 54.9% of the total area, of which the majority is mild drought level 38.3%, high and serious level is 16.7%. About the area of perennial land has drought area accounted for 33.76% of the total area, of which Dong Xoai town has the highest percentage of drought-affected areas compare to other districts. The results of the study aimed to identify drought areas with different levels so that managers can promptly take measures to protect agricultural crops and to ensure people's livelihoods in the global climate change trend seriously affecting the localities today.

Analysis of genetic diversity of 100 cashew (Anacardium occidentale L.) cultivars screened in Binh Phuoc based on nut yield and ISSR markers

Cashew (Anacardium occidentale L.) is an important tropical tree, belonging to Anacardiaceae family and has high economic value growing in Vietnam. The objective of this study was to assess genetic diversity of cashew distributed in Binh Phuoc province for breeding development and conservation. A total of 100 cashew samples of over 10 years age distributed in Binh Phuoc province were divided into eight main groups based on nut yield. In contrast, the cluster analysis was divided 100 cashew samples into 12 groups based on 11 ISSR markers. The genetic diversity of 100 cashew samples ranged from 0.04 to 0.26, with a mean of 0.19. The results showed that cashew samples were high levels of polymorphism based on nut yield, as well as the ISSR markers. The results of this research would be one of the important information in the genetic evaluation of cashew trees and useful information for cashew breeding development in future.

A report of Meloidogyne javanica on black pepper (Piper nigrum) in Binh Phuoc Province, Vietnam

Root and rhizospheric soil of diseased black pepper plants from Binh Phuoc Province were collected. Based on morphological characteristics and molecular markers, the presence of Meloidogyne javanica was confirmed. In greenhouse conditions, nematode completed the life cycle in 35 days after inoculation on black pepper (Piper nigrum) cv. Vinh Linh. To our knowledge, this is the first report of M. javanica on black pepper in Vietnam.

Đa dạng loài và mối quan hệ di truyền giữa các loài giun đất ở tỉnh Bình Dương và Bình Phước

This study aimed to know the diversity and genetic relationship of earthworm species in Binh Duong and Binh Phuoc provinces. The results showed that, a total of 25 earthworm species belonging to 10 genera, 6 families were recorded from Binh Duong and Binh Phuoc provinces. Of which, Drawida beddardi and Eukerria saltensis were recorded for the first time in the southeastern part of Vietnam. Two previously recorded species, Amynthas modiglianii and Metaphire californica, were re-identified as M. neoexlis and M. planata. The earthworm fauna of Binh Duong – Binh Phuoc region clearly contains the tropical elements. The genus Metaphire belonging to the family Megascolecidae is dominant with 13 recorded species. The genetic distance between earthworm species ranges from 0.033-0.217, with the mean of 0.111. The phylogenetic tree shows the unresolved relationship between Metaphire and Amynthas. Within the genus Metaphire, the M. houlleti species group (M. houlleti, M. cf. campanula, Metaphire sp.1 and Metaphire sp.4) and the M. bahli species group (M. bahli, M. peguana and M. kiengiangensis) were separated from other linages, but with low supportive bootstrap value (60% and 43%, respectively).

Tuyen Quang and Binh Phuoc compa-rative analysis of potential for tourism industry development

Tuyen Quang and Binh Phuoc compa-rative analysis of potential for tourism industry development

Solutions for Tuyen Quang and Binh Phuoc international tourism products and services development comparative analysis

Solutions for Tuyen Quang and Binh Phuoc international tourism products and services development comparative analysis

Differences and similarities in offered services of Tuyen Quang and Binh Phuoc tourism industry

Differences and similarities in offered services of Tuyen Quang and Binh Phuoc tourism industry

Solutions for Tuyen Quang and Binh Phuoc international tourism promotion comparative analysis

Solutions for Tuyen Quang and Binh Phuoc international tourism promotion comparative analysis

Hygienic Practices and Structural Conditions of the Food Processing Premises Were the Main Drivers of Microbiological Quality of Edible Ice Products in Binh Phuoc Province, Vietnam 2019.

Background:Ice is used in large quantities as refreshment in alcoholic and nonalcoholic beverages, especially in summer time. Contamination of edible ice products with pathogens is a public health concern in various countries, including Vietnam. This study aimed to assess the food safety conditions, the quality of edible ice products and related factors at manufacturing premises in Binh Phuoc Province, Vietnam in 2019.Methods:A cross-sectional study was conducted in 2019 using both quantitative and qualitative methods. Food safety assessment was carried out in all 45 ice producing premises in the province and 79 ice samples were collected and analyzed microbiologically. In-depth interviews were conducted with 2 food safety management staff, 4 owners of premises, and 4 workers.Results:Only 22.4% (18/79) and 37.8% (30/79) of the premises met requirement for food safety conditions and microbiological food safety requirements, respectively. Half of the ice samples, 51.9% (41/79), were contaminated, 49.4% (39/79) with Escherichia coli and 12.7% (10/79) with total coliforms. Streptococci, Pseudomonas aeruginosa were not detected. The major risks were material, odds ratio (OR) = 4.2 (95% confidence interval [CI]: 1.002-17.6), structural challenges in the facilities, OR = 4.3 (95% CI: 1.13-16.7), broken floors or difficulty in cleaning, OR = 5.4 (95% CI: 1.26-22.9), and poor staff hygiene practices, OR = 19.5 (95% CI: 4.2-91.1). Workers lacked knowledge and appropriate practices to prevent microbial contamination of ice products.Conclusions:The food safety conditions and the quality of ice cubes at manufacturing premises in Binh Phuoc Province were not acceptable. Hygiene deficiencies in ice producing and handling processes, inadequate knowledge of staff, inadequate food safety management practices, and hygiene conditions of the premises were important factors in producing contaminated ice products. We recommend more staff training and crediting the staff when performing adequate practices, paying attention to broken floors or difficulty in cleaning, structural deficiency, and ensuring regular monitoring of premises. This study adds a special interest to ensure food safety conditions at ice producing premises to prevent microbial contamination of the products.

Solutions for attracting FDI into Tuyen Quang and Binh Phuoc tourism indu-stry comparative analysis

Solutions for attracting FDI into Tuyen Quang and Binh Phuoc tourism indu-stry comparative analysis

Taking advantages of the potential of Tuyen Quang and Binh Phuoc de-veloping tourism industry comparative analysis

Taking advantages of the potential of Tuyen Quang and Binh Phuoc de-veloping tourism industry comparative analysis

Developing human resource for Tuyen Quang and Binh Phuoc tourism industry comparative analysis

Developing human resource for Tuyen Quang and Binh Phuoc tourism industry comparative analysis