The objective of the study was to evaluate the situation of bladder problems in cats in Ho Chi Minh City and investigated physiological and biochemical indicators in blood of these cats. The study was carried out from November 2021 to July 2022. A total of 164 cases of bladder problems in cats were collected from 3 veterinary hospitals. The results showed that the higher rates of bladder problems in cats occurred in male at 81.71% (female 19.29%), local breed at 63.41% (foreign breed 35.59%), neuterd cat at 64.02% (intact cat 35.98%), commercial food group at 61.59% (mixed diet 38.41%) and free keeping at 54.88% (keep in cage 45.12%). The rates of aged groups (< 2 years, 2-5 years, > 5 years) analyzed by gelded cat and interventional treatment were significantly different (P < 0.05). X-Ray was efficient to diagnose the bladder problems in cats. Results of typical physiological and biochemical indicators associated with the bladder pathology showed that there were increases in white blood cells (29.06 K/µL), monocytes (4.62 K/µL), hemoglobin (27.86 g/dL), aspartate transaminase (73.42 U/L), creatinine (298.53 µmol/L), blood urea nitrogen (20.57 µmol/L) and a decrease in platelets (36.16 K/µL). These blood indicators played an important role in the evaluation of decreased functions of liver and kidneys in the bladder problems of cats. 

Salt tolerance is one of the characteristics to ensure the viability of microorganisms when combined with chemical fertilizers. This research aimed to isolate bacteria that had both phosphate-solubilizing and salt-tolerant abilities for production of controlled-release inorganic fertilizer-incorporated microorganisms. Of twenty-five phosphate solubilizing bacteria strains isolated from soil samples collected from Ho Chi Minh City, Dong Nai, and Long An provinces on Pikovskaya medium (PVK), there were three strains of bacteria that had both phosphate solubilizing activity and salt tolerance. The analysis results on PVK medium supplemented with 3% and 4% NaCl showed that only PSM54 strain had phosphorusdegrading ring. Species identification based on 16S-rRNA sequence showed that PSM54 was 99.9% similar to Bacillus velezensis. The controlled-release fertilizer was made by coating biodegradable polymers incorporated with PSM54 bacteria that met standards for slow dissolution according to The Association of American Plant Food Control Officials. After 60 days of being immobilized in the membrane of controlled release, the PSM54 bacteria remained at 88.3% compared to the initial density.

Agricultural export has contributed greatly to Vietnamese economy over the past decades. Nevertheless, logistics performance and institutional quality have been identified as chronic inhibitors and bottlenecks which hamper the export growth of Vietnam. This paper aimed at investigating whether agricultural export was hindered logistically and institutionally. The considered case was Vietnam and major trading partners in the 2007-2018 period. The panel data analysis with fixed and random effects for the baseline estimation was used. Findings indicated that the agricultural export was positively influenced by income per capita and economic and institutional quality similarity between trading partners. Improved logistics performance may unintentionally cause a short term decrease in agricultural export. Institutional quality needs to be enhanced with substantive and specific contents related to the agricultural sector, which mitigates the institutional inequality between industries and locals in the economy.

The study was conducted from January 2021 to April 2022 in a number of public parks, residential parks in urban areas, major streets and boulevards, and coffee shops in Ho Chi Minh City. The study was performed by using survey forms, taking pictures and collecting samples. Identification of trees was done by morphological comparison and analysis of collected data, and then information was used for landscape design via using professional design softwares. The results showed that 23 species belonging to 20 genera of the Arecaceae family were identified. Public parks had 22/23 species while residential parks, coffee shops and streets had 17/23 species, 8/23 species and 4/23 species, respectively. Trees of the Arecaceae family identified included 16 species with solitary stem and pinnate (69.5%) and 7 species with clustered trunk and palmate (30.5%). Sketchup, Lumion, and Photoshop softwares could be used for conceptual design that combines the palm trees and other species in the landscape. 

Ecotourism is a trend of development in the tourism industry. Thanh An island commune (Can Gio district) is one of the most attractive ecotourism destinations in recent years of Ho Chi Minh City. This study aimed to analyze the factors affecting the development of ecotourism in Thanh An island. The results of Exploratory Factor Analysis showed that there were 6 factors affecting ecotourism development in Thanh An island: (1) Service costs, (2) Facilities - infrastructure, (3) People, (4) Safety and security, (5) Environment and natural resources, and (6) Landscape. Based on the research results, some solutions to develop ecotourism in Thanh An island were proposed.

The experiment was carried out to determine effects of potassium and phosphorus fertilizers on growth and yield of the soybean variety VNUAĐ2. The experiment was conducted in the spring season of 2021 and was a split-plot design with 3 replications. Potassium levels included 0, 60, 80 and 100 kg/ha and phosphorous levels were 0, 70, 90 and 110 kg/ha. The effects of different fertilizer rates were determined through growth and development characteristics (plant height, number of leaves, number of nodes, number of branches), leaf area index, number and weight of nodules, yield components and yield. Results showed that phosphorus and potassium fertilizer application resulted in better plant growth and development than no fertilizer application. Also, the average plant height (47.4 to 50.5 cm), number of branches (2.2 to 2.6), number of nodules in the flowering period (51.2 to 56.3) and yields (1.77 to 1.81 tons/ha) with phosphorus application were better than the plant height (46.1 cm), number of branches (2.0), number of nodules (48.1) and yield (1.74 tons/ha) without phosphorus application. Different levels of fertilization affected the growth and development of VNUAĐ2 variety and its yield. The level of application of potassium (80 kg/ha) and phosphorus (90 kg/ha) significantly increased yield components and yield by 10,1 - 50% as compared with no fertilizer application. When compared with other fertilization levels, the application of potassium (80 kg/ha) and phosphorus (90 kg/ha) resulted in better total pod number of 38.1 pods/plant (30.9 - 36.5% higher), number of filled pods of 36.7 pods/plant (6.70 - 31.5% higher), percentage of 3-seeded pods of 12.9% (6.6 - 29.0% higher), individual yield of 11.42 g/plant (0.53 - 14.1% higher) and yield of 1.86 tons/ha (1.1 - 8.8% higher). Thus, the most suitable fertilizer rate for the soybean variety VNUAĐ2 in the spring season was 80 kg/ha of potassium and 90 kg/ha of phosphorus. 

The objectives of this study were to determine the optimal latex pH level for coagulation of rubber latex using lactic acid and to evaluate the effects of lactic acid on natural rubber coagulum quality. In this study, 3% lactic acid was added to the latex until the latex pH values reached 4.6, 4.9, 5.2, 5.5 and 5.8; meanwhile, the control treatment was added with 3% acetic acid until the latex pH value was at 5.4. The rubber coagula of the optimum and the control treatment were evaluated for mechanical, physical and chemical criteria based on the international standards of quality for natural rubber grades. The results showed that latex pH of 5.5 resulted from the addition of 3% lactic acid was the optimum for latex coagulation, which also helped to reduce the necessary amount of acid used in latex coagulation and therefore reducing the risk of water pollution. The quality of natural rubber coagulum that was coagulated by lactic acid met all requirements of technical standard for SVR 5 grade based on the Standard Vietnamese Rubber 3769:2004. The rubber coagulum coagulated by 3% lactic acid had a higher initial plasticity (Po) and a lower plasticity retention index (PRI) than that coagulated by 3% acetic acid.