bluuebunny/crossref_metadata_2025 huggingface dataset:
Leaders of the Pack
Authors: Kumble Julie , Smith Donald
Published: May 2023

Veterinary medicine has undergone sweeping changes in the last few decades. Women now account for 55 percent of the active veterinarians in the field, and nearly 80 percent of veterinary students are women. However, average salaries have dropped as this shift has occurred, and even with women in the vast majority, only 25 percent of leadership roles are held by women. These trends point to gender-based inequality that veterinary medicine, a profession that tilts so heavily toward women, is struggling to address. How will the profession respond? What will this mean for our students and schools? What will it mean for our pets entrusted to veterinarian care? Who has succeeded in these situations? Who is taking action to lead change? What can we learn from them to lead the pack in our lives? Leaders of the Pack, by Julie Kumble and Dr. Donald Smith, explores key themes in leadership and highlights women in veterinary medicine whose stories embody those themes. In it, Kumble and Smith cull over three years of interviews to profile a wide variety of women as they share triumphs and challenges, lucky as well as tough breaks, and the sound advice and words that inspired them to take their careers in unanticipated directions. By sharing unique stories that illuminate different paths to leadership and reflecting on best practices through commentary and research, Leaders of the Pack will allow more female leaders to create wider pathways to the top of their profession.
IMPLEMENTASI METODE GUIDED INQUIRY-DISCOVERY UNTUK MENINGKATKAN HASIL BELAJAR IPA SISWA KELAS IV SDN AMANSARI 02 KECAMATAN RENGASDENGKLOK KABUPATEN KARAWANG
Authors: Kuswandi Sony , Rudiyana Rudiyana , Wulandari Fauziah
Published: May 2023

Proses pembelajaran yang terjadi di SDN Amansari 02 Kecamatan Rengasdengklok Kabupaten Karawang pada siswa kelas IV semester 2 adalah siswa tidak menguasai konsep gaya, penyebabnya adalah pemilihan materi bahan ajar yang tidak sesuai dengan kemampuan dan minat siswa sehingga siswa menjadi malas dan menyebabkan kurangnya berkonsentrasi pada saat pembelajaran, siswa kurang kreatif saat pembelajaran karena kurangnya sarana dan prasarana, hal itu terlihat dalam penggunaan media dan alat peraga yang guru gunakan sangat terbatas. Penelitian ini dilakukan di SDN Amansari 02 Kecamatan Rengasdengklok Kabupaten Karawang Tahun Pelajaran 2019/2020. Metode yang penulis gunakan adalah metode guided inquiry discovery. Sampel penelitian adalah siswa kelas IV SDN Amansari 02 Kecamatan Rengasdengklok Kabupaten Karawang sebanyak 30 siswa.Metode guided inquiry discovery yang digunakan penulis ketika mengajar ternyata merangsang ketertarikan siswa untuk belajar IPA. Penulis mampu membebaskan diri dalam membimbing siswa. Hasil dari penelitian ini terdapat perbedaan kemampuan siswa kelas IV SD Negeri Amansari 02 Kecamatan Rengasdengklok Kabupaten Karawang sebelum dan sesudah menggunakan Guided Inquiry Discavery. Dari hasil analisis, sebelum menggunakan Guided Inquiry Discavery diperoleh hasil belajar siswa 5,4% dan sesudah menggunakan Guided Inquiry Discavery diperoleh 24,2 % sehingga terjadi peningkatan 18,8%.
Penerapan Pendekatan Inkuiri untuk Meningkatkan Hasil Belajar Siswa dalam Pembelajaran IPA di Sekolah Dasar (Penelitian Tindakan Kelas pada Siswa Kelas V SDN Rengasdengklok Selatan II)
Authors: Ajeng Arini Dede , Gianistika Chika , Rahmat Rahmat
Published: May 2023

Berdasarkan hasil observasi di SDN Rengasdengklok Selatan II, banyak pembelajaran IPA yang memiliki masalah dalam penyampaiannya, sehingga siswa mengalami kesulitan dalam memahaminya. Guru sering terjebak dengan masalah klasik yaitu proses pembelajaran yang monoton dan membosankan. Tujuan yang hendak dicapai dalam penelitian ini adalah untuk mengetahui hasil belajar siswa sebelum penerapan pendekatan inkuiri pada pokok bahasan pesawat sederhana dalam pembelajaran IPA di Sekolah Dasar. Metode yang digunakan adalah penelitian tindakan kelas. Masing-masing siklus meliputi perencanaan tindakan, pelaksanaan, observasi dan refleksi. Penelitian Tindakan Kelas dilakukan di SDN Rengasdengklok Selatan II yang berlokasi di Jalan Perintis Kemerdekaan Desa Rengasdengklok Selatan Kecamatan Rengasdengklok Kabupaten Karawang. Subjek Penelitian Tindakan Kelas adalah siswa kelas V SDN Rengasdengklok Selatan II tahun ajaran 2019/2020. Yang berjumlah 31 siswa, terdiri dari 12 orang laki-laki dan 19 orang perempuan. Hasil dari penelitian ini menunjukan bahwa hasil belajar siswa pada siklus 2 sudah mencapai KKM yaitu 61,60. Aktivitas siswa sebesar pada siklus 1 aktivitas siswa meningkat dengan prosentase sebesar 35%. Pada siklus 2, aktivitas siswa mengalami peningkatan kembali dengan prosentase sebesar 85%.
CAPITAL STRUCTURE AND FIRM FINANCIAL PERFORMANCE OF LISTED DEPOSIT MONEY BANKS IN NIGERIA: MODERATING EFFECT OF BOARD FINANCIAL LITERACY
Authors: Idris Abdulwahab Anas , Bala Hussaini , Kwambo Mansur Lubabah , Adamu Abubakar
Published: May 2023

The purpose of this work is to examine the interaction of members of the board with financial knowledge on the association among capital structure with firm financial performance in the Nigeria DMBs. Empirical studies were reviewed to scrutinize the upshot of capital structure in connection to the performance of firms. As the result of the foregoing, this study introduces board financial literacy as a moderator variable to interact between capital structure with performance of firms. A correlational design was adopted. Population and sample size of the study consists of 13 listed DMBs on the floor of Nigeria Stock Exchange for the period 2012 to 2021. Fixed effects regression model was employed to analyse the data of the study. Diagnostic test was conducted to confirm the validity of the statistical inferences of the study. The result shows that BFL moderated the correlation involving DEFR with financial performance. Also, the result found that EFR and DEFR were not significant to the firm financial performance of DMBs in Nigeria. This work recommends that board members with financial literacy should come up with effective policy towards encouraging debt financing in their entities by effective supervision so as to enhance the overall firms’ financial performance as well as safeguarding shareholders interest. Research in future should replicate this topic in a domain other than DMBs.
INFLUENCE OF SOCIALIZATION ON MSME COMPLIANCE BY MEDIATING UNDERSTANDING AND MODERATING KNOWLEDGE OF TAX VISITS
Authors: Rahayu Yayuk Ngesti
Published: May 2023

This study aims to determine the role of tax knowledge in being able to strengthen the relationship between tax socialization and understanding of taxpayers and understanding of taxpayers being able to mediate the relationship of socialization of tax visits or picktime to 151 MSMEs in the "Selecta" destination, Batu City - East Java - Indonesia. This research is included in survey research, but from a number of MSMEs that are eligible for data analysis, there are 148 because 3 respondents are considered unfit for processing. Testing mediation and moderation using WarpPLS in order to determine the mediating role of the taxpayer understanding variable and the moderating role of the taxpayer knowledge variable. WarpPLS is also used to test the fit of external models which include convergent validity tests and composite reliability, compositer Realiability, Model Fit and Quality Indices. The results show that understanding taxpayers is able to mediate the impact of "Picktime" socialization on taxpayer compliance, while knowledge of tax visits can strengthen the relationship of tax visit socialization to taxpayer compliance, especially knowledge related to providing ease of use of the picktime application and being able to increase the influence of socialization on taxpayer understanding tax to get a queue number make a face-to-face appointment with the tax officer
SUSTAINABILITY REPORTING AND FINANCIAL PERFORMANCE OF LISTED MANUFACTURING FIRMS IN NIGERIA
Authors: Aiyesan Olabode Olutola
Published: May 2023

This study examines the effect of sustainability reporting (SR) on financial-performance of listed manufacturing firms in Nigeria from 2010 to 2020. Ex-post facto research design was employed and 24 firms form 8 sectors were sampled. Data were sourced from their annual report and analysed using Panel-regression technique. The study found positive significant connection linking DP, ERS and R&D and financial performance while CRS has negative insignificant effect on financial-performance. Base on the findings, the study concluded that SR has positive influence on financial-performance of listed manufacturing firms in Nigeria. The study recommended that relevant authorities should encourage firms to report SR on real-time and make reporting compulsory and not voluntary. There should be strict enforcement on firms to increase investment in R&D as this will increase profitability and help climate change.
NIGERIA ECONOMIC GROWTH AND CAPITAL MARKET DEVELOPMENT: DOES CONTRIBUTORY PENSION SCHEME MATTER?
Authors: AKINWUMI Ayorinde Olutimi , Oladele Toluwa Celestine , Sanmi ADEBOYE Emmanuel
Published: May 2023

Whether the contributory pension scheme (CPS) has addressed the shortage of capital for investments, the challenge of full compliance with the system and the shortage of investment outlets spurred the interest to investigate the impact of the CPS on capital market development and economic growth from 2005 to 2021. Secondary data was adopted for this study, and the data were extracted from the National Pension Commission and world development indicators. The study employed the auto-regressive distribution lag (ARDL) model as an estimation technique. The empirical results show that among the proxies for gross domestic product, total pension fund asset (TPFA) was significant in both the short and long run, which showed that a 1% increase in TPFA would produce a 0.0028% increase in the GDP. Also, among the proxies for capital market development, total pension fund asset (TPFA) was significant in both the short and long run, which showed that a 1% increase in TPFA would produce a 0.024% increase in capital market development. Based on these findings, the study concluded that CPS influenced capital market development and economic growth. Consequently, this study recommended, among others, that the NPC should continue to partner with relevant stakeholders such as pension fund administrators and custodians by making its investment regulations more flexible and encouraging increased pension fund investments.
DETERMINANTS OF FINANCIAL PERFORMANCE OF LISTED DEPOSIT MONEY BANKS IN NIGERIA
Authors: Lazarus Mary Seansu , Miko Nurudeen Usman , Mazadu Saifulahi Abdullahi
Published: May 2023

This paper seeks to address some factors influencing the financial performance of listed DMBs in Nigeria as the industry has a crucial role to the growth and development of the nation. The major goal of this study was to examine, using secondary data the determinants of financial performance of DMBs with international operating license between 2010 and 2020. Analysis was carried on 8 listed banks using secondary data, correlation and ex-post factor research design. According to the study's findings, all of the indicators have a large impact on the financial performance of the listed financial banks, with the exception of liquidity risk, which has no significant effect. It is therefore recommended that the management of listed DMBs strictly concentrate on investing in lower risky projects, developing and adopting an effective internal control system with clear policies and procedures and to also adhere to CBN directives in maintaining a certain capital adequacy ratio and to checkmate some internal management factors that led to a significant but negative relationship between ROA and LR as the relationship is expected to be significant and positive. This would assist them in achieving their objectives and prevent liquidation and bankruptcy.
EFFECT OF FEMALES IN THE BOARDROOM ON CORPORATE SUSTAINABILITY REPORTING
Authors: Suleiman Salami , Aliu Olanrewaju Atanda
Published: May 2023

Increasing body of research overtime has focused on corporate sustainability reporting due to its global significance. However, there is still scarcity of studies, especially, on the role of women in improving corporate sustainability reporting. Furthermore, this relationship is rarely investigated using African data. This studytakes advantage of this existing gap to explore the effect of female directorship andrepresentation in the audit committee on corporate sustainability reporting. This study utilized 120 firm year observations from sampled African firms that adopted for the period 2015 to 2020. Using quantitative approach, regression analysis wasused to test the hypotheses. The results of the regression analysis indicate that both female directorship and female presence in the audit committee have a significant positive effect on corporate sustainability reporting. It is therefore recommended that women directorship should be mandated on the boards of African firms to improve corporate sustainability reporting.
HUMAN RESOURCE ACCOUNTING AND PROFITABILITY OF LISTED DEPOSITMONEY BANKS IN NIGERIA
Authors: Ibrahim Ahmad Adamu , Adamu Ahmad Rufa’I , Alhassan Fatihu Mahmud , Abdulsalam Muhammad Iliyas
Published: May 2023

One of a company's most important intangible assets is its human capital. Because a company’ssuccess or failure depends on how well its few physical resources are exploited by its human resources, a company’s failure to account for human resources and the changes that occur inside may present a misleading image of its performance. due to inconsistent in the literature, the study examine the relationship between human resource accounting and financial performance of deposit money banks in Nigeria. The study used ex-postfacto research design as it entails the use of annual reports and accounts of listed Deposit Money Banks in the Nigerian Exchange Group. Secondary data were sourced from the banks’ financial report for the period of seven (7) years from 2015 to 2021. The dependent variable is Return on Assetsuse as a proxy of profitability, the independent variables are: Staff Cost, Directors’ Remunerations use as the proxy of human resource accounting. The study control for age and size.The descriptive statistics, correlation and regression statistical method of analysis are employedto test the nature, relationship and effect among the variables using Statistical Software (STATA v14). The result shows that HRA has significant effect on the financial performance of listed deposit money banks in Nigeria. Thus, upon recommendation, workers should be retain to avoidunemployment, and company management should endeavor to send workers on training and development to accommodate the structural changes.
Mathematics Learning Planning in the Independence Curriculum
Authors: Hakiki Lintang Sunny , Murtiyasa Budi , Djumadi Djumadi
Published: May 2023

Mathematics is a very important subject at every level of education in every country. This is proven by making mathematics a basic competency in PISA (program for international student assessment). Based on the results of the 2019 PISA, the ability of Indonesian students to score below the OECD average in reading, mathematics and science. It can be concluded that the reading and mathematics abilities of students in Indonesia still need to be improved, so it is necessary to strengthen literacy and numeracy through effective mathematics learning plans. The purpose of the research is to explain the planning of learning mathematics in the independent curriculum. This research is a qualitative research with a case study. Data collection techniques using observation, interviews and documentation. Data validation uses technique triangulation and source triangulation. Data analysis used interactive data analysis from Miles Huberman. The results showed that the planning of learning mathematics begins with the analysis of learning outcomes, determining learning objectives, determining the flow of learning objectives and making teaching modules.
Benefits of Online Learning for Students of the PPKn Study Program Class of 2020 during the Covid 19 Pandemic
Authors: Mawene Enka , Sialana F , Soumokil Agustinus
Published: May 2023

Students of the PPKn study program, teacher training faculties and education who during the pandemic used online learning on the one hand have benefits for students but on the other hand there are weaknesses of online learning. Online learning is learning carried out in the network, meaning learning that takes place online using applications that can display a class face-to-face online. Online learning has taken place in the Pancasila and citizenship education study programs since 2020 with the aim of meeting educational standards through the use of information technology.Basically, online learning is a tool or intermediary for the delivery of learning materials, it needs to be used, especially during a pandemic, therefore the use of online applications is one of the most important learning media carried out in learning activities between lecturers and students, teaching and learning activities are a process of forming self-understanding of science, knowledge,  Psychic and social, in the implementation of online learning learning applications have an important role in increasing student motivation and interest, Based on the results of the study, researchers found that online learning is independent learning and high interactivity, able to increase memory levels, provide more learning experiences, with text, audio, video and animation all used to convey information, and also provide ease of conveying, updating content, downloading, students can also send emails  to other students, send comments on discussion forums, use chat rooms, to videoconference links to communicate directly.
Developing English Instructional Materials by Combining YouTube and ABA (American and British Academy) Application
Authors: Syaripuddin Rahmatullah
Published: May 2023

This research was based on the students’ problem regarding the English teaching, especially English materials where they have poor English skills because the lecturer did not have instructional materials related to their department, the media and method did not interesting, and instructional facilities did not enough to cover the learning process. The objective of this research was to develop English speaking materials based on modified ADDIE approach (Analyze, Design, Development, Implementation, and Evaluation). This research was conducted at the Biological students of Muhammadiyah University of Parepare, Indonesia. The method used in this research was developmental research which attempts to develop English learning material for English skills based on the modified ADDIE approach (Analyze, Design, and Development). The researcher applied design instructional as the research design. The researcher implemented some steps in developing English speaking materials; Need Analysis, Design, Development, Expert Validation, Revision, Try Out, and Final Product. The result of the research was The suitable materials for Biological students of Muhammadiyah University of Parepare were authentic materials. The development was coursebook which was designed to possibly for the students working on it. The materials were adopted from YouTube and ABA English. The instructional materials focused on input, process, and output. The students’ positive perception toward the instructional materials was in a very good value and the lecturer’s positive perception was also in very good value. It means that English for Biology instruction has a good quality in the form of the course map, lesson plan, lecturer’s manual, topic, video clips, materials, students’ worksheet, learning activities, and assessment
Improving Information Writing Skills Using Standard Vocabulary Through Audio Visual Media
Authors: Wahiburrokhman M , Bagiya Bagiya , Ratnaningsih Arum
Published: May 2023

This research is a classroom action research that aims to improve writing skills using standard vocabulary in class III students at SDN Sidowangi through audio-visual media. This study uses the research design of Kemmis and Mc. Taggart which consists of two cycles and each cycle consists of planning, implementing actions, observing and reflecting. This research was carried out at SDN Sidowangi involving 14 students consisting of 8 boys and 6 girls. Based on the results of initial observations on students at Sidowangi Elementary School, especially in class III, there are still many who have not been able to write a sentence using the right vocabulary so it needs to be improved. The results showed that the action was obtained. At the pre-cycle stage, the ability to write information using standard vocabulary in class III obtained an average score of 43.13 and in cycle I obtained an average score of 51.4. Both of these scores indicate that from pre-cycle to cycle I there was an increase of 8.27 points. Furthermore, in cycle II students obtained a class average of 85.33. Thus, from cycle I to cycle II students' writing skills using the standard vocabulary of class III at SDN Sidowangi increased by 33.93. It can be concluded that the use of audio-visual media in writing skill material using standard vocabulary can improve student learning outcomes.
Revitalizing a Transplantation Science Curriculum through Creative Technology Methods
Authors: Mistretta Sharon
Published: May 2023

Donor Alliance of Colorado and Wyoming revitalized their transplantation science curriculum by infusing creative technology into lesson planning and methodologies. The overarching goal of this revitalization was to deliver accurate content to students, their families, and the education community about how transplants work and who this life-saving science impacts. This article recounts the work of the curriculum team to align design and computational thinking frameworks with discovering the present affordances of their middle and high school stakeholders and ultimately bridge available resources into an engaging and interactive curriculum. The curriculum team constructed this bridge from educators’ affordances to their effectivities to provide them with virtual avatars, surveys to reveal current knowledge, audio and video content to invite questions, and interactive augmented reality applications to delve deeply into the study of the human body. The transplantation science curriculum connects stakeholders with accurate information to change the trajectory of transplantation science from misconceptions to registration as an organ, eye, and tissue donor. This article is a vital step to fill a gap in the literature about using creative technology methods to enact critical pedagogy as transformative teaching and learning that embraces the imperative that we, in education, mirror society.
Đánh giá hiệu quả bộ sinh phẩm Amplisens shig/EIEC-salm-camp-F1 phát hiện 3 tác nhân gây bệnh tiêu chảy bằng kỹ thuật real-time PCR
Authors: Bui Thi Thanh Nga , Pham Viet Hung , Le Thi Lan Anh , Pham Thi Ha Giang , Bui Thi Lan Anh
Published: May 2023

Assessing diagnostic efficacy of shig/eiec-salm-camp-f1 (Amplisens) Kit in direction of three bacteria causing cute diarrhea (Campylobacter, Salmonella and Shigella). 96 feces specimens were collected from non-treated pediatric patients with acute diarrhea and 30 controls were collected from normal persons without gastrointestinal disease. The sensitivity and specificity of Amplisen Shig/EIEC-salm-camp-F1 kit (Interlab Servive Company, Russian Federation) were evaluated by using real-time PCR technique. The results showed that Amplisens kit had the high specificity (100%) and high sensitivity (100%). The detection limit was at least 103 CFU/mL. These results were similar to the those of the Sacace kit (standard kit) that has been commercialized in Vietnam. The results also showed that 17.71%, 11.46%, and 7.29 % of the specimens were positive for Campylobacter, Salmonella and Shigella, respectively, in which 1 sample was detected the co-infection of Campylobacter and Salmonella (1.04%). Therefore, the Amplisens kit can be valuable in early diagnosis of acute infectious diarrhea caused by three bacteria including Campylobacter, Shigella, Salmonella in Vietnam.
Sàng lọc các chủng kháng nấm gây bệnh thực vật và mô tả chi tiết chủng Streptomyces hydrogenans VTCC 41117 có hoạt tính cao
Authors: Luu Tran Dong , Vu Son Tung , Nguyen Thi Van , Dinh Thi Ngoc Mai , Nguyen Hong Minh , Nguyen Kim Nu Thao
Published: May 2023

Diseases caused by fungi are a huge threat to agricultural production. Currently more than 8 000 species of fungi are known to cause plant diseases, greater than any other pathogen. Among them, there are 05 common fungal pathogens causing diseases on thousands of different plant species including Phytophthora capsici, Alternaria sp., Colletotrichum gloeosporioides, Fusarium sp. and Botrytis cinerea. Biological control approach using actinomycetes to control fungal diseases on plants are considered very potential and safe for the environment. However, for this method to be highly effective, it is necessary to have strains with strong antifungal activities. In this study, 245 actinomycete strains preserved at the Vietnam Type Culture Collection (VTCC) were screened for its antagonistic activity against 5 strains of fungal pathogens. The screening results showed that strain VTCC 41117 had a strong and stable antagonistic activity against all 5 strains Alternaria sp., Botrytis cinerea, Colletotrichum gloeosporioides, Phytophthora capsici and Fusarium sp. with inhibitory effect of 40-55%. Results of identification by 16S rDNA sequence showed that VTCC 41117 strain is Streptomyces hydrogenans. Physiological, biochemical properties, cultivation conditions of VTCC 41117 were also identified in this study.
Sinh thái học phân tử: Một số vấn đề lý thuyết và ứng dụng thực tiễn
Authors: Vu Dinh Duy , Le Xuan Dac , Pham Mai Phuong
Published: May 2023

With the development of molecular marker technology in the 1980s, specially their applications solving basic questions and ecological research. To explore the knowledge about molecular ecology, several reviews have been published in the sincelast three decades. The molecular markers have been widely used in study and selection of plants and animals. Molecular marker used in studies of genetic diversity, phylogeny, classification, gene tagging and identification; in germplasm and marker assisted selection. The presence of various types of molecular marker, and differences in their principles, methodologies, and applications require careful consideration in choosing one or more of such methods. Meanwhile, no molecular markeris available that fulfill all requirements needed by researchers. Depending on the nature of each study, one can choose among the variety of molecular marker techniques, each of which combines at least some desirable properties. However, all these reviews were meant for researchers with advanced knowledge of molecular genetics(gene identification and gene mapping), genetic diversity and structure of population, phylogenetic relationship and breeding (plant and animal). This review will provide better understanding in science and technology about recent developments in molecular markers, their applications and possibly devoted to early researchers with a little or no knowledge of molecular markers.
Nghiên cứu chế tạo sơn phủ bảo vệ tạm thời bề mặt các chi tiết kim loại
Authors: Nguyen Van Vinh , Ha Huu Son , Le Quoc Pham
Published: May 2023

This article presents the results of research on manufacturing the paint coating from the raw materials available in domestic market. The paint coating is intended to be used for temporary protection of metal surfaces. The raw materials include copolymer resin of vinyl chloride and vinyl acetate, dibutyl phthalate plasticizer and solvent mixture of toluene and methyl ethyl ketone. The paint coatings made from different mixture formulas of the raw materials were tested to find out the optimal one M2, based on which the prepared coating was easiest to be totally pulled off from metal surface. Also, the coating from M2 formula was tested to assess other physical-chemical properties in comparison with that of the paint coating XC-567 imported from Russia. Additionally, the accelerated test was carried out as well to compare the pull off ability of the two paint coatings. The test result showed that the quality of the coating based on M2 formula was equivalent to that of paint coating XC-567 made in Russia.
Biến đổi trạng thái chức năng cơ thể của thủy thủ tàu ngầm sau một năm đi biển
Authors: Hoang Van Huan , Bui Thi Huong , Nguyen Hong Quang , Tran Thi Nhai
Published: May 2023

Submariner is a specific work with many adverse environmental factors. These factors constantly affect submariners leading to numerous physiological and psychological stressors so that the state of body function is reduced, occurring occupational disease and reducing work quality of submariners. The changes of body functional state of sixty submariners were monitored after one-year seafaring of combat-ready training by using Ritm-MET (Moscow, Russia) equipment. The results showed that the body functional status of submariners was relatively equal, ratio of submariner having body functional state that meet requirements of occupational health was remained pretty high (> 90%). After one-year seafaring of combat-ready training, the results showed that: the heart rate, and Hildebrant index, and TI index increased higher than those of them before one-year seafaring of combat-ready training (67.0±1.0 vs 72.0±1.0), (4.16±0.11 vs 4.30±0.10), (87.17±9.65 vs 135.0±12.0), respectively and exceeding the permitted limitation (30÷120). Thereby, in conclusion, body functional state was decreased by intensity and stress of one-year seafaring of combat-ready training, especially the cardiovascular regulation of central nervous system.
Tối ưu thông số lên men sinh tổng hợp α-L-rhamnosidase bởi Aspergillus niger ĐH51 sử dụng phương pháp đáp ứng bề mặt
Authors: Dinh Thi Thu Trang , Nguyen Thu Hoai , Do Tat Thinh , Le Thi Hue , Vu Thi Hanh Nguyen
Published: May 2023

The Response Surface Methodology (RSM) was used to optimize the fermentation condition for the production of Į-L-rhamnosidase by Aspergillus niger ĈH51. RSM reflects the interaction and impact of different variables at a given moment. Among 11 surveyed factors by Plackett-Burman design, the concentrations of rhamnose, rutin, and pH were identified as the 3 most influencing factors on the Į-Lrhamnosidase production (p < 0.05). The optimal conditions derived from BoxBehnken design were: rhamnose = 1.1%, rutin = 0.6% and pH = 5.7. Under this condition, the highest Į-L-rhamnosidase activity obtained was 3.67 U/ml. When switching to fermentation in the Winpact 10 L fermentor, Į-L-rhamnosidase activity of 3.85 U/ml was obtained at an agitation speed of 200 rpm and aeration rate of 0.8 vvm.
Đa dạng vi tảo biển vùng quần đảo Trường Sa, Việt Nam
Authors: Dang Diem Hong , Hoang Thi Minh Hien , Le Thi Thom , Nguyen Cam Ha , Luu Thi Tam , Ngo Thi Hoai Thu , Vu Thi Loan , Nguyen Trong Dan , Ngo Trung Dung , Than Van Hau , Nguyen Thu Hoai , Do Thi Thu Hong
Published: May 2023

In this study, marine microalgal communities in 12 islands belonging to the sea water region of Truong Sa Islands (Spratly Islands), Vietnam in May-June and October-November 2021 was studied. There were 305 species of marine microalgae belonging to 7 phyla were identified in 12 islands in this sea water region of Truong Sa Islands (Spratly Islands) in 2021 in which with 39 dominant species, highest species number of 147 in Central (London) Reef (D1) and the lowest species number of 15 in Ambonya Cay (D4) were detected. Up to 2021, in the sea water region of the Truong Sa Islands (Spratly Islands), 14 genera of toxic harmful algae have appeared. The average value of biodiversity index (H') and the diversity value index (Dv) in all 12 studied islands in the Truong Sa Islands (Spratly Islands) in 2021 is 3.61±0.40 and 3.43±0.39, respectively, showing that the diversity of marine microalgae of this sea water region is rich and the quality of its sea water is generally good. It has been determined that two main factors NO3- and oil content, followed by DO, salinity, temperature and Hg content in seawater were affected the density of marine microalgal cells in the sea water of Truong Sa Islands (Spratly Islands) in 2021. In which, the marine microalgal cell density has a negative correlation with temperature, salinity, NO3- and Hg content of seawater and has a positive correlation with DO parameter was discovered.
New records of powdery mildew fungi (Erysiphaceae, ascomycota) and rust fungi (Pucciniales, basidiomycota) for Vietnam
Authors: Dudka V.A. , Popov E.S. , Nguyen Dang Hoi
Published: May 2023

For Vietnam, a small number of obligate parasitic fungi are given, in powdery mildew (Erisiphales) and rust fungi (Pucciniales). Basically, these are old lists of species that require confirmation or revision. In 2021, a joint expedition was conducted by the staff of the Joint Vietnam-Russia Tropical Science and Technology Research Centre and the Komarov Botanical Institute (BIN RAS). During this expedition, several new species of parasitic fungi were identified for Vietnam. Among the powdery mildew fungi (Erysiphales): Erysiphe trifoliorum and Pseudoidium cocculus were found in an amorphous state characteristic of the tropical region. Among the rust fungi (Pucciniales), Phragmidium potentillae is a widespread species from the genus Phragmidium on Potentilla spp. and Puccinia oxalidis on Oxalis debilis subsp. corymbosa.
Some aspects of growth and development of self-seeding Dipterocarpus turbinatus C. F. Gaertn (1805) (Southeast Vietnam)
Authors: Zhirenko N.G. , Nguyen Van Thinh
Published: May 2023

The paper presents studies related to the growth and development of self-seeding Dipterocarpus turbinatus C. F. Gaertn (1805), which grows in the Cat Tien National Park (Southeast Vietnam) under natural conditions. It is shown that the main limiting factors influencing the vital activity of self-seeding are air humidity, illumination and water supply. Some features of seedling development are revealed. The root growth rate was determined to be ~ 1.5 cm/day, and the stem growth rate was 4 - 5 cm/day. It is shown that the formation of the seedling occurs due to the nutrients of the endosperm and lasts for 10 - 12 days. In conditions of insufficient illumination, the seedlings reach a certain height and turn into "sticking out sticks". Approximately in the second year, self-seeding falls out. It was revealed that self-seeding is characterized by a high growth rate of photosynthesis at low PAR values. The optimum air temperature for the processes of photosynthesis and transpiration of seedlings is 28 ± 1°C. With an increase in the concentration of CO2 in the air, of photosynthesis naturally increases.
Mammal survey in Song Hinh protected forest, Phu Yen province, Vietnam
Authors: Abramov A.V. , Kurskop S.V. , Dinh The Dung , Vu Dinh Duy
Published: May 2023

Rapid field surveys of mammals in the Song Hinh Protected Forest (Phu Yen Province, Vietnam) were conducted in January and June 2021. Thirty-four small mammals were recorded based on field observations and on morphological and/or molecular evidence: two Scandentia species, three Eulipotyphla species, three Carnivora species, 10 Rodentia species and 16 Chiroptera species. The results of the present study confirm the wealth and diversity of small mammals in the studied area. Undoubtedly, Song Hinh Protected Forest is worth having higher conservation status, like a Nature Reserve.
Features of movements of climbing perch Anabas testudineus in water flow and on land
Authors: Pavlov E.D , Tran Duc Dien , Ganzha E.V. , Pavlov D.S.
Published: May 2023

Climbing perch Anabas testudineus in contradistinction to most fish is able to move not only in water but also on land. In the experiments, we study the diurnal locomotor activity of fish, the features of their movements in flow of clean water and polluted water by urea and thiourea, and the effect of decreasing water level on the crawling and moving on land. The behavior of fish in clean water aimed to move downstream at the beginning of the test and moving upstream in the end of the test. Fish exposition (12 days) under 0.05% urea and thiourea change their behavior in the water flow, which is expressed in the chaotic movement of fish relative to the current. Decreasing water level to the critical value (<3 cm) initiates climbing perch to crawling and moving on land. Two types of fish responses to decreasing water level were found: waiting, or crawling to land and moving. Based on the study diurnal locomotor activity, we found that the probability of climbing perch movements is higher in the daytime than in the dark.
Nghiên cứu đánh giá tác động của trường thủy động lực đến địa hình đáy biển đảo Nam Yết – Trường Sa
Authors: Khuong Van Long , Nguyen Dinh Hai , Le Van Tuan , Hoang Van Thanh
Published: May 2023

This research assesses the impact of major marine hydrodynamic factors, such as waves, currents, and sea levels on the changing processes of the seabed topography and the coastlines of the Namyit (Nam Yết) Island of Truong Sa (Spratly) Islands, based on a many continuous years-data set. The study uses MIKE model to calculate and simulate the impact of wave field and current field on the process of accretion and erosion that changes the topography of the seabed. The results show that when comparing between calculated wave height, speed of the currents, and sea level height and those observed on scene are 69.1%, 54.5%, and 95.4% respectively. These figures meet the requirement of Nash Sutcliffe Efficiency, in which calculated sea level shows highest reliability. The research results provide an overview of wave and currents regimes in Northeast and Southwest monsoon seasons, and the characteristics of the current seabed topography around Namyit Island. The changing of seabed around Namyit Island includes diversified accretion and erosion. In the area from the depth of 10 m to the Island’ coastlines, the accretion dominant, with sediment thickness of up to 2.0 m. At 200 m West and East of the island, there have erosion areas, with sediment thickness reduces to 1.0 m. The changing of natural seabed topography of the researched area is mainly impacted by the process of accretion and erosion of sediment due to hydrodynamic regimes (waves, currents, and sea levels fluctuations) and the development and decline of seabed coral system. The research results are the scientific basis for planning, and proposing the construction around the island, planning for navigation channels dredging, and providing information for naval training, exercises, and operations around offshore islands.
Species diversity of the large centipedes (Chilopoda: Scolopendromorpha) in the Muong Nhe Nature Reserve, Dien Bien province
Authors: Le Xuan Son , Tran Thi Thanh Binh , Nguyen Duc Hung
Published: May 2023

This paper introduces the results that study on the diversity of the large centipede Scolopendromorpha in Muong Nhe Nature Reserve (Dien Bien province). The results recorded 10 species belonging to five genera and two families. This result has added eight species to the centipede fauna in this area, bringing the total number of species recorded here to 11 species. Of which two species have been recorded by Vu et al. (2020) are Otostigmus multidens and Otostigmus aculeatus; The species Otostigmus voprosus recorded by Schileyko (2007) was not recorded in this study. For the species recorded, the study also provided basic information about the collected specimens such as coordinates, altitude... their distribution in Vietnam and some remark on species, specimens compared to other studies.
Đa dạng sinh học thực vật phù du ở vùng hạ lưu sông Vàm Cỏ, tỉnh Long An
Authors: Le Thi Trang , Phan Doan Dang
Published: May 2023

The study was conducted at ten sites in the lower of Vam Co river, Long An province from January to July 2018. The samples were collected by phytoplankton net and fixed with 5% formalin at the field. A total of 223 phytoplankton species were recorded, belonging to 106 genera, 66 families, 37 orders, and 6 divisions, of which the diatom group dominated in the species number. The average cell density ranged from 27 144 ± 8 508 cells/liter to 153 743 ± 45 300 cells/liter. The dominant species recorded in the study area include Merismopedia punctata, Oscillatoria acuta, Oscillatoria perornata, Oscillatoria sp., Microcystis aeruginosa, Microcystis panniformis, Lyngbya martensiana, Cyclotella meneghiniana, Skeletonema costatum, Coscinodiscus jonesianus, Melosira granulata. The high densities of phytoplankton were rich food sources for larvae, zooplankton, shrimp, fish, and bivalves. The Shannon - Weiner index, Simpson index, and Margalef index showed that the phytoplankton of lower Long An was diverse and abundant.
Giáp xác ký sinh trên ghẹ chữ thập Charybdis feriata Linnaeus, 1758 khu vực vịnh Nha Trang
Authors: Le Thi Kieu Oanh , Vo Thi Ha , Nguyen Phuong Lien , Nguyen Thi Hai Thanh , Hoang Ngoc Lam , Dang Thuy Binh , Truong Thi Oanh , Tran Quang Sang
Published: May 2023

Charybdis feriata (Linnaeus, 1758) is wide distribution and high economic value species in many countries around the world. In Vietnam, Charybdis feriata is on the list of endangered species that need to be conserved. Parasites cause many effects on the growth and development of crabs, which may be one of the causes leading to the decline of host populations. This paper presents the species composition, parasitic sites and infection status of parasitic crustaceans on C. feriata in Nha Trang Bay. From 113 individuals of Charybdis feriata collected in June and July 2022, we have identified 6 species of parasitic crustaceans, of which 2 species have been recorded for the first time on this crab, including: Octolasmis neptuni, Semibalanus sp.. Each infested crab is infected with up to 5 species of parasites. Octolasmis angulata was the dominant species with the highest prevalence and median intensity of infection at 44.4% and 6.5 individuals/infected crabs, respectively. Comparison of infection status by sex and host size showed that Sacculina serenei infection rate was higher in female crabs than male crabs, while infection intensity in male crabs was higher than female crabs. The prevalence and intensity of infection with Octolasmis angulata species increased significantly with host size. There was no statistical difference between the different host groups of sex and size. The data on parasitic crustaceans on Charybdis feriata contribute to the basis for the recovery, sustainable development of this endangered species.
Nghiên cứu vai trò chỉ thị sinh học của Collembola trong đánh giá chất lượng đất ở khu vực Chạm Chu, Tuyên Quang
Authors: Nguyen Thi Thu Anh , Dang Van An , Nguyen Duc Anh
Published: May 2023

Collembola communities are differently affected by land use practices. This study relies on the relationships between Collembola community structures and land use systems as a proxy for characterizing changes in soil quality. Thus, Collembola community structure (density, richness of Collembola morphotypes, eco-morphological groups - edaphic, hemiedaphic and epigeic) were examined in agro-forestry ecosystems to evaluate the discriminative power of the Collembola community structure. Fifteen morphotypes of Collembola were recorded in this study, 4 belonging to the edaphic eco-morphological group, 6 hemiedaphic, and 5 epigeic. The hemiedaphic and epigeic groups, in agricultural system, were more influenced by changes in land uses than the groups in natural forest system. Collembola eco-morphological groups and density were better predictors for ecosystem functioning and can be used to distinguish differences between soil uses, reducing laboratory analysis time.
The Effect of Hypertension Exercise on Blood Pressure Reduction in The Elderly at Wisma Seruni UPT PSTW Jember
Authors: Hidayaturrohkim Riski , Claudia Echi Agnes , Rizqullah Yuzqi , Septiyansah Dimas Anggi , Agustin Nanda Leoni , Kurdi Fahruddin , Ersanti Septin Wahyu
Published: May 2023

As the elderly population increases and the aging process they experience, triggers the occurrence of various diseases, especially hypertension. Improper management of hypertension causes a decrease in quality of life and morbidity in the elderly. This study aims to determine the effect of hypertension exercise on the blood pressure of the elderly at Wisma Seruni UPT PSTW Jember. The design of this study used a quasi-experimental with pretest and posttest one group design. The sampling technique used was a total of 8 respondents who met the inclusion criteria. Changes in blood pressure were measured using an aneroid sphygmomanometer and data analysis using the statistical test T-Test Dependent. The results showed that the average systolic blood pressure (SBP) before the first day of therapy was 147.5 mmHg and the second day 138.75 mmHg while the average systolic blood pressure after the elderly hypertension exercise was carried out on the first day of 140 mmHg and the second day 131.25 mmHg, the average diastolic blood pressure (DBP) before the first and second day of therapy was 84.38 mmHg while after the first day of therapy it was 82.5 mmHg and the second day was 80.63 mmHg. Based on the results of the analysis test using the dependent t-test, the SBP results before and after the intervention were 0.000 (p<0.005). There was an effect on the decrease in systolic blood pressure on the first and second day of intervention. Hypertension exercise therapy is an alternative solution to reduce blood pressure in the elderly with hypertension.
Pencapaian Tugas Perkembangan Remaja Ditinjau dari Kematangan Intelektual di SMP N I Sasak Ranah Pasisia Kabupaten Pasaman Barat
Authors: Sinne Defria , Santosa Budi
Published: May 2023

Based on the reality at SMPN 1 Sasak Ranah Pasisia. students who are not satisfied with their grades, and students must think about how so that students can solve these problems and understand what the teacher explained. for example learning in class students do not understand what the teacher explained, the purpose of the research is so that students understand what the teacher explains and students can solve their own problems. This research is a descriptive research. This study has a population of 123 students and a sample of 30 students. Data collection techniques in this study using Random Sampling Techniques. The data analysis technique uses manual processing of ITP results (Development Task Inventory). Based on the research conducted, the results show that the level of developmental tasks is a continuum structure of self-development from simple to complex. In general, the developmental level of elementary school children is between 1 and 4, junior high school aged children between 2 and 5, high school aged children between 3 and 6, and student age levels between 4 and 7.