SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY

RESEARCH ON SPECIES COMPOSITION AND DISTRIBUTION OF TERRESTRIAL GASTROPOD MOLLUSCS (MOLLUSCA: GASTROPODA) IN THE COASTAL AREA OF DA NANG CITY

Bình Nguyen — 2024-11-14

The article mentions the results of research on the composition of terrestrial gastropod molluscs in the coastal area of Da Nang city conducted from June 2022 - October 2023. Through analysis, 17 species were identified. Among the identified species, there are 15 species with hard shells to protect the body and 2 species of slugs (shells disappear). Among the identified species, 13 species have been recorded in Da Nang, with low species biodiversity (H'= 1,2049). Adding 4 species of terrestrial gastropod molluscs to Da Nang.

Terrestrial Gastropod molluscs are distributed in 3 main habitat types in Da Nang city: Son Tra peninsula habitat has 6 species with the average density of all species being 2.42 Ind/cm²; The densely populated area has 6 species with the average density of all species being 11.67 individuals/m² and Ngu Hanh Son habitat has 11 species with an average species density of 155.42 individuals/m².

EFFECT OF SOME TECHNOLOGICAL FACTORS IN THE PROCESS OF JAM FROM PINEAPPLE ADDED COCONUT CREAM

Hanh Vu — 2024-11-14

Pineapple (Ananas comosus) is a nutritious tropical fruit often eaten as fresh or processed products such as pineapple juice, concentrated pineapple juice, and dried pineapple... Currently, pineapple puree products are not popular on the market and there has still not been complete research on the processing technology of this product. This study aimed to determine some technological parameters including coconut milk mixing ratio, additional citric acid content, additional pectin content, added sugar ratio, and appropriate concentration time to create products with the best sensory quality in terms of structure, color, smell, and taste. Factors include total soluble solids content (TSS) (pre-concentrate and post-concentrate), pH (pre-concentrate and post- concentrate), total organic acid content, and sensory evaluation were monitored in each experiment. According to the results, the ratio of mixing coconut cream (80/20), the content of added citric acid (0.4%), the added pectin content (0.7%), the ratio of added sugar (85/15), and the concentration-time (30 minutes) are suitable for processing this product with the best sensory quality.

SEROPOSITIVE RATES OF TOXOCARA CANIS LARVAE IN PEOPLE IN CUOR KNIA COMMUNE, BUON DON DISTRICT, DAK LAK PROVINCE

Trong Phan — 2024-11-14

Objective: To determine the seropositive rates of Toxocara canis larvae in people in Cuor Knia Commune, Buon Don District, Dak Lak Province in 2020.

Research subjects: The subjects were all the people of the ages of 3 and above who were permanent residents in Cuor Knia Commune, Buon Don District, Dak Lak Province.

Methods: The study design was cross-sectional.

Results and discussion:

- The seropositive rate of Toxocara canis larvae accounted for 39.01%, in which the rates of male and female were almost the same (40.00% compared to 38.29%), ≥ 15-year-old group accounted for 42.80%, <15-year-old group accounted for 25.30%, (p < 0,01).

-There was a statistical relationship between the seropositivity rates for Toxocara canis larvae in agricultural occupations and students (48.8% compared to 15.8%), and between students and other occupations (15.8% compared to 30.9%), (p < 0.01). However, there was no statistical relationship between agricultural occupations and other occupations (48.8% compared to 30.9%).

- There was no significant relationship between ethnicity, education level and seropositivity rate for Toxocara canis larvae, (p>0.05).

-32.62% of the studied subjects had normal eosinophil index (<5%), and 79.19% increased (≥ 5%), (p < 0.05).

EVALUATION OF THE WORK OF ISSUING LAND USE RIGHTS CERTIFICATE ON LAND AREA RETURNED TO LOCALITY BY AGRICULTURAL FORESTRY COMPANIES AND FOREST MANAGEMENT BOARDS IN TUYEN QUANG PROVINCE IN 2023

Hien Nguyen — 2024-11-14

The study was conducted in Tuyen Quang province, in order to evaluate the current status of the issuance of land use rights certificates on land areas returned to localities by agricultural and forestry companies, tea companies, and forest management boards. direction. Research results show that: as of July 31, 2023, the whole province has issued 14,748 certificates with a total area of 4215.83 hectares of land in Yen Son, Na Hang, Lam Binh, Chiem Hoa, Ham Yen, Son Duong and Tuyen Quang city. All certificates are issued for the first time to land users. From there, propose solutions to improve the efficiency of certification work in Tuyen Quang.

APPLICATION OF Aspergillus oryzace Yeast FOR COMMERCIAL PERD FISH CULTIVATION (Anabas testudineus) IN LAND POND IN AN GIANG

Tham Nguyen — 2024-11-14

The study was conducted in Vinh Chau commune, Chau Doc city to apply Aspergillus oryzace yeast when incubated to raise commercial perch (Anabas testudineus) intensively in land ponds. Monitor and evaluate technical parameters such as: weight gain, survival rate, FCR of experimental ponds with traditional ponds after the end of the farming harvet season; Evaluate the economic efficiency of using Aspergillus oryzace yeast when fermentation to raise commercial perch intensively compared to the traditional perch farming model that does not use Aspergillus oryzace when fermemtation. These experimental results indicated that fish growth indicators improved in ponds supplemented with probiotics and achieved the best results based on average daily growth in NT2 at 3.01%; NT1 is 2.90%;. The FCR coefficient fluctuated between treatments from 1.8 to 1.6. The survival rate of fish over 3 months of culture/crop in treatments without probiotic supplement was 93.34% and with probiotic supplement 2 was 94.7%. Productivity and profit of apply Aspergillus oryzace yeast were higher than those without apply.

ASSESSING THE CURRENT STATUS AND LAND POTENTIAL FOR THE DEVELOPMENT OF GYMNEMA SYLVESTRE IN YEN NINH, PHU LUONG, THAI NGUYEN

Nhuận Nguyễn Đức — 2024-11-14

Yen Ninh commune is a commune in Phu Luong district, the economic structure is still largely based on agriculture, facing practical local requirements, it is necessary to evaluate land use efficiency and propose suitable crops. each land map unit in the district. With the superior features of the geographic information system (GIS), the authors have applied GIS technology to study biological characteristics and land adaptation zoning for the Gymnema sylvestre tree in Yen Ninh commune. Phu Luong district, Thai Nguyen province according to criteria suitable to the type of land use in Yen Ninh commune, Phu Luong district, Thai Nguyen province and propose directions for land use for the purpose of developing sustainable agricultural production. solid. Through the process of building a map adapted to 06 criteria, an area of 537.76 ha, has been identified that is very suitable for growing spoonbill trees mainly in the commune. These are lands that have natural elements and characteristics suitable for the production of Gymnema sylvestre plants. The research of the topic has important practical significance in the planning, management and use of agricultural land in Yen Ninh commune.

BUILDING A PROCESS FOR GRILLED MEAT SPICE POWDER FROM ILLICIUM VERUM

Lưu Hồng Sơn Lưu Hồng Sơn — 2024-11-14

pices are one of the most important and indispensable elements of dishes, largely determining the flavor and deliciousness of the dish.
Grilled meat is a close and familiar dish to Vietnamese people due to its attractive scent, easy to eat, and attractive to both old and young people, especially young people. However, to be able to create delicious and attractive grilled meat, in addition to choosing meat, choosing spices to marinate the meat is the most important step. Barbecue seasoning is a blend of many different spices. As a result, we researched and selected the grinding mode, anti-caking agent Tixosil 38 at a rate of 1% and successfully built a process for producing barbecue seasoning from anise fruit.

IMPROVING THE PRODUCTIVITY AND QUALITY OF NGAN HUY VA.69 SUPER SWEET MELONS IN TUYEN QUANG THROUGH CHANGES IN FERTILIZER USAGE

Hue Nguyen — 2024-11-14

Melon (Cucumis melon L), a fruit vegetable with high nutritional value, is being grown many crops and regions in a year. Studies have shown that nutrition affects the fruit quality of melons (Le Thi Kieu Oanh, 2018), but previous fertilizer formulas have used fertilizers lined with manure and high amounts of in innociated manure, often leading to poor quality of melons. To improve the yield and quality of pears, the experiments have added the amount of microbial compost and reduced the amount of inorganic fertilizers such as protein and potassium for super sweet melon Ngan Huy VA.69 in Tuyen Quang. The results of the experiments have shown that adding microbiological fertilizers of 2.0 kg, protein ure 1.0 kg, potassium chloride: 2.0 kg for and the formula for supplementing microbiological fertilizers 3.0 kg, protein ure 0.8 kg, potassium chloride: 1.6 kg has reduced pests, yields have reached 112.3 - 118.7 weights / ha and the brix level 14.5 - 15.6 %, higher than non-fertilization of microorganisms and high concentration of protein and potassium.

STUDY OF FACTORS AFFECTING THE FERMENTATION OF PINEAPPLE JUICE

NHUNG TRINH THI — 2024-11-14

Fermented fruit juice is a nutritious and extremely popular product today. The objective of this study is to investigate the factors affecting the fermentation of pineapple juice for processing fermented beverage products, such as dry matter concentration, initial pH of fruit juice, yeast ratio supplementation and fermentation time. The results showed that the final product reached the alcohol content at 4,07%v and the remaining post-fermentation sugar content at 6,57 ^oBx when the initial pineapple juice was adjusted with a soluble dry matter concentration of 20 ^oBx, pH = 3.8, the yeast addition at 0,03% and the fermentation time of 96 hours. The fermented pineapple juice product had a high sensory score according to TCVN 3215-79 and exhibited harmonious and light aroma of ethyl alcohol.

THE ANTIBACTERIAL AND ANTIOXIDANT ACTIVITY OF GYNOSTEMMA PENTAPHYLLUM AT NA HANG, TUYEN QUANG

Dai Tran — 2024-11-14

Gynostemma pentaphyllum (Thunb.) is a creeping perennial herb that belongs to the family Cucurbitaceae. GP had been used in treating various diseases, such as anti-Cancer Effect, immune modulation, Inhibition of cell migration, regulation of gut microbiota, cell cycle arrest, anti-atherogenic, lipid-regulating, anti-obesity, hyperlipidemia, alzheimer’s disease, anti-Parkinson’s disease, hepatoprotective, hypoglycemic…. In this study, antibacterial activity was conducted to assess the antibiotic ability of the extracted of Citrus sinensis specimens on 96-well microtitre microplates according to the method of Vander Bergher và Vlietlinck (1991), và McKane & Kandel (1996) and Antioxidant Activity by 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. Results: Crude extract and ethanol (GPN) inhibited the growth of 4 strains of bacteria and fungi (E.coli, P.aeruginosa, S.aureus và C.albicans); The ethyl acetate (PGE) extract inhibited the growth of 5 strains of bacteria and fungi (E.coli, P.aeruginosa, S.aureus, A.niger, C.albicans); The n-hexan (PGE) extract inhibited the growth of 5 strains of bacteria and fungi (P.aeruginosa , B.subtillis và F.oxysporum); The water (PGE) extract inhibited the growth of S.aureus. The results suggest that Gynostemma pentaphyllum extract has potent antioxidant activities. Gynostemma pentaphyllum at Na Hang, Tuyên Quang could be utilized as a functional food to supplement, against oxidative stress and minimized the impact of aging.

THE LAND SNAIL GENUS LAOTIA SAURIN, 1953 (GASTROPODA: ALYCAEIDAE), WITH NEW RECORDS ON DISTRIBUTION RANGE

Sang Đo — 2024-11-14

The land snail Laotia Saurin, 1953 is currently in the family Alycaeidae Blanford, 1864, in the superfamily Cyclophoroidea Gray, 1847, with limited distribution to Northern Vietnam and Northern Laos (Xieng Khouang, Luang Prabang). Laotia species are mainly distributed in forests over limestone. To date, 4 species and subspecies have been identified, of which the first species (Laotia pahiensis Saurin, 1953) was discovered in Pah Hia, Xieng Khouang, Laos, and 3 species (L. c. christahemmenae, L. c. phami, and L. luongi) were discovered in Vietnam. In this study, the distribution of L. c. phami from Dien Bien Province was recorded for the first time. Genus Laotia is characterized by its very small to small shell size, usually less than 5 mm; shell conical, dextral, consisting of 4-5 whorls, of which the last whorls grow rapidly; the protoconch smooth, the teleoconch rough with many radial ribs, lamellar-like and raised; approximately a quarter of the body whorl is turned obliquely upwards so that the aperture is directed toward the apex.

Evaluating the registration and issuance of land use rights certificates in Do Luong district, Nghe An province in the period of 2019 - 2021

Thuy Nguyen — 2024-11-14

The work of granting certificates of land use rights, ownership of houses and other assets attached to land in Do Luong district, Nghe An province has had encouraging results recently. However, there are still some difficulties and problems that need to be overcome. Therefore, a research project has been conducted to evaluate the current status and effectiveness of the issuance of land use rights certificates, thereby providing feasible solutions. The project evaluates the work of granting land use rights certificates based on secondary data and a survey of 120 land users and 20 professional staff. The results of data synthesis show that in the period 2019 - 2021, Do Luong district has 18,999 applications for residential land certificates, with a total area of 1,502.77 hectares. The total number of approved applications for all 3 years is 13,295, accounting for 69.98%. Results of registration and issuance of certificates of agricultural land use rights: there are 9,337 applications with a total area of 4,716.59 hectares. The number of approved applications is 6,605, reaching an average rate of 70.74%. 10 factors affecting the registration and issuance of land use rights certificates have been found. From these results, the research team also proposed two groups of highly feasible solutions to accelerate the issuance of land use rights certificates in the study area.

EFFECTS OF ACTIVATED ALKALINE WATER ON THE GERMINATION PROCESS AND INCREASING ISOFLAVONE CONTENT OF SOYBEAN SEEDS

Nhung Tran — 2024-11-14

In order to benefit consumers and the economy of the producer, we have studied the use of activated alkaline water during soybean soaking to shorten germination time and increase isoflavone content of soybean grains. It was found that the quality of soybean germinated when using normal water and activated alkaline water was determined. The results demonstrated that the seeds were soaked in activated water hydrated at 86.86% and achieve germination rate at 80% a day earlier than in normal water. When soybean seeds were soaked in normal water and activated at 28 ° C for 2 hours, then germinated for 3 days collected soybean seeds with corresponding levels daidzein of 19.08 and 23.46 mg /100g.

Research on rearing Anguilla marmorata at Nhat Nam Seafood single share-holder limited company, Tuyen Quang province.

Trang Pham — 2024-11-14

Experimental rearing of Anguilla marmorata in tanks in Na Hang Tuyen Quang district with a stocking density of 500 fish/m3; Powdered synthetic food with minimum protein content (P) = 48-50%, lipid: ≥ 4.0, fiber ≤ 3.0, moisture ≤ 10; calcium 2.0 - 5.0; ash ≤ 17 and mixed with vitamins, digestive enzymes, minerals; Diet: 3-5% of fish weight/day, adjusted according to the fish's ability to catch prey; Fish feeding time is at 8:00 a.m. and 6:00 or 7:00 p.m. daily; Water pH from 7 - 8; temperature 23-30oC; DO >5 mg/l. The results of rearing show that after 3 rounds of stocking rearing, the growth rate of fish is quite good. In the first round, the survival rate is the lowest (73%), and later on, the survival rate is higher (80%). Weight increases on average 6-7 grams/month, length 4-6cm/month. Total herd weight = 1,993.0 kg, average size ± 50 grams/head.

STUDY ON PREPARATION BACTERIAL CELLULOSE NANOFIBERS COATED NANOLIPOSOMES CONTAINING DOXORUBICIN USING FOR ORAL ADMINISTRATION

Thành Nguyễn Xuân — 2024-11-14

Doxorubicin (DOX) is a potential anti-cancer agent but has limited clinical applications due to serious side effects caused by parenteral administration and low oral bioavailability. Preparation of nanoliposomes (LIP) is considered an effective solution to increase the oral bioavailability of DOX. This study aims to prepare the LIP-DOX coated with bacterial cellulose nanofibers (NanoBCF) for oral administration. The LIP-DOX or NanoBCF-LIP-DOX was successfully prepared using the hydration method. The obtained LIP-DOX or NanoBCF-LIP-DOX have nano-sized size (< 200 nm), with uniform distribution (PDI < 0.25) and high encapsultion efficiency (> 80%). The release of DOX from LIP-DOX, or from NanoBCF-LIP-DOX lasts up to 12 hours. DOX release from NanoBCF-LIP-DOX was slower than from LIP-DOX. The release of DOX from LIP-DOX or from NanoBCF-LIP-DOX follows a diffusion mechanism and follows the Higuchi model (in NanoBCF-LIP-DOX) and the Korsmeyer-Peppas model (in LIP-DOX). The results demonstrated the successful preparation of the NanoBCF-LIP-DOX system to create a potential sustained-release DOX delivery system for oral administration.

COMPARE THE EFFICIENCY OF WASTEWATER TREATMENT FOR AQUACULTURE BETWEEN ENYDRA FLUCTUANS LOUR AND IPOMOEA AQUATICA

Hạnh Trần — 2024-11-14

Aquaculture wastewater with moderate concentrations of organic pollutants is very suitable for treatment with aquatic plants. The study was conducted with 3 experiments, in which, enydra fluctuans lour and ipomoea aquatica selected for wastewater treatment has an average height of 10 cm, grown in a model (styrofoam box) with a density of 100 trees/m². The research results showed that ipomoea aquatica and enydra fluctuans lour could adapt and grow well in the eel farming wastewater, which was characterized by an increase in biomass parameters. The ability of ipomoea aquatica to treat organic pollutants is higher than that of enydra fluctuans lour. The results were reached via experiment as follows: The average density and biomass of ipomoea aquatica were increased by 1.32 times and 4.9 times, while the average density and biomass of enydra fluctuans lour were increased by 1.69 times and 4 times, after 20 days of experiment. The pH of wastewater after treatment was ranged from 7 to 8. Total suspended solids (TSS) of wastewater after treatment was reduced by about 78%. COD concentration in the experiment of enydra fluctuans lour was decreased by about 70%, while COD concentration in the experiment of ipomoea aquatica was decreased by about 83%.

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admin admin — 2024-11-14

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BUILDING A PROCESS FOR ISOLATION AND SPAWN PRODUCTION OF STORK’S NECK REISHI MUSHROOM FROM PHU QUOC

Lưu Hồng Sơn Lưu Hồng Sơn — 2024-11-14

Stork's neck reishi mushroom is a type of medicine mushroom in Vietnam which limited in research. A few articles showed that this type of reishi mushroom has positive effects on cancer cell lines, diabetes, anti-inflammation and antioxidants tests. In this research, sample of stork's neck reishi mushroom collected from Phu Quoc National Park, Kien Giang province, Vietnam are isolated and prepared for production trial of spawn. The result indicated that the mycelium grow well on PGA medium, and covered the surface of the culture plate after 10 days of culture. Sequencing of the 18S gene showed that the fungal sample was related to the species Ganoderma neojaponicum. The isolation process should be carried out when the mushroom fruit body is young, white, and soft. Mushroom culture temperature ranges from 20-28 ^oC. The spawn grow well on rice substrate supplemented with CaCO₃ 1,5%, KH₂PO₄0,5 g/l, K₂HPO₄ (g/l), MgSO₄.7H₂O 0,5 g/l. Mycelium inoculation should be conducted at the middle of substrate bags, time to cover substrate is around 18-20 days.

RESEARCH AND EVALUATION OF REGISTRATION AND ISSUANCE OF LAND USE RIGHTS CERTIFICATE; REGISTRATION OF LAND CHANGES IN THAI NGUYEN PROVINCE PERIOD 2018- 2023

Hien Tran — 2024-11-14

Research and evaluate the registration and issuance of land use rights certificates; Land change registration is carried out in Thai Nguyen province, period 2018 - 2023. Results show that in the period 2018 - 2023, Thai Nguyen city has received a total of 29,853 applications. dossier with forms of land use right certificate renewal; Re-issuance of land use rights certificates; Registration and issuance of land use right certificates for the first time. The total number of documents resolved on time is 26,859, reaching 89.97%, the number of documents being processed is 1,466, accounting for 4.91%, the number of overdue documents is 966 documents, accounting for 3.24%; The number of returned documents was 562, accounting for 1.88%. The reason the application is overdue is because the land user is slow in completing procedures to add additional documents, or is slow in fulfilling financial obligations...; The reason the documents were returned was due to incomplete documents; dispute; The land user cannot prove the origin of land use... The main types of registration of land use changes at the Land Registration Office are transfer, gift, inheritance, extension and mortgage, deletion mortgage land use rights, separate land plots. Thus, to continue to achieve even better results in the coming time, it is necessary to: Further strengthen inspection, examination and supervision of the authority and responsibilities of agencies and civil servants in enforcement. equitment. Continue to enhance the people's supervision role in state management of land.

Inhibits diabetes of steroid isolated from Plectranthus amboinicus (Lour.)

Nhan Ngu — 2024-11-14

From the methanol extract of the Plectranthus amboinicus (Lour.), was collected in Thanh Hoa province, two compounds b-sitosterol (1), and Stigmasterol (2) were isolated. The chemical structure of these compounds were determined by the interpretation of NMR spectral data and comparison with published data. This is the first time they are reported from Plectranthus amboinicus (Lour.).

CURRENT CAPACITY, CHALLENGES AND CAPACITY BUILDING NEEDS OF AGRICULTURAL EXTENSION WORKERS UNDER THE CONTEXT OF CLIMATE CHANGE IN BAC KAN PROVINCE

Hương Hoàng — 2024-11-14

Nghiên cứu này nhằm đánh giá năng lực hiện tại, khó khăn và nhu cầu nâng cao năng lực của cán bộ khuyến nông (CBKN) tại tỉnh Bắc Kạn trong bối cảnh biến đổi khí hậu (BĐKH). Nghiên cứu được thực hiện trong năm 2021-2022 bằng phương pháp phỏng vấn sử dụng bảng hỏi với sự tham gia của 17 lãnh đạo và 59 cán bộ của các cơ quan khuyến nông. Kết quả nghiên cứu cho thấy đội ngũ khuyến nông của tỉnh Bắc Kạn có lợi thế về trình độ và kinh nghiệm làm việc. Các khó khăn chính gặp phải do BĐKH bao gồm (1) sự bị động trong việc chỉ đạo sản xuất và công tác chuyển giao công nghệ; (2) khó khăn trong dự báo và phòng trừ sâu-bệnh hại; (3) khối lượng công việc của CBKN tăng lên; (4) việc tuyên truyền gặp nhiều khó khăn, đặc biệt ở những địa phương có dân tộc thiểu số, nhà ởphân tán, và đi lại khó khăn. Phần lớn CBKN chưa được đào tạo cả về phương pháp khuyến nông và thích ứng với biến đổi khí hậu. Quy trình kỹ thuật sản xuất (cây trồng, vật nuôi) thích ứng với BĐKH, phương pháp truyền thông khuyến nông hiệu quả và mạng lưới chia sẻ thông tin giữa các cán bộ khuyến nông được xem là những tài nguyên học tập chính mà CBKN mong muốn được trang bị để triển khai tốt nhiệm vụ khuyến nông trong bối cảnh BĐKH.