bluuebunny/crossref_metadata_2025_split huggingface dataset:
NGHIÊN CỨU ĐỘC TÍNH CẤP VÀ BÁN MÃN TÍNH CHIẾT XUẤT ETHANOL THÔ CỦA QUẢ Caryota urens L. (CỌ ĐUÔI CÁ) TRÊN CHUỘT SWISS ALBINO
Authors: TRẦN THỊ PHƯƠNG NHUNG  
Published: March 2023

Caryota urens L. phân bố rộng rãi ở các vùng rừng núi Việt Nam. Quả C. urens chứa các hợp chất như ancaloit, flavonoit, phenol, cacbonhydrat … có tác dụng điều trị loét dạ dày, đau nửa đầu, viêm khớp … Nghiên cứu này nhằm đánh giá tính an toàn của chiết xuất ethanol thô quả C. urens (EtCU) trên chuột Swiss albino qua thử nghiệm độc cấp và bán mãn tính. Thử nghiệm độc cấp tính, chuột được uống các liều 1000, 3000, 5000 mg EtCU/kg một lần duy nhất, theo dõi liên tục trong 4h đầu tiên kể từ sau khi uống, không liên tục đến 24h, và theo dõi hàng ngày trong 14 ngày. Những hành vi bất thường, các triệu chứng nhiễm độc và tử vong được quan sát. Thử nghiệm độc bán mãn tính, chuột được uống EtCU với liều 100, 300, và 500 mg EtCU/kg trong 90 ngày. EtCU không gây ra sự khác biệt đáng kể về lượng thức ăn, nước uống tiêu thụ, khối lượng cơ thể, thành phần nước tiểu, huyết học, sinh hóa, khối lượng tương đối và mô học gan, thận so với đối chứng. Kết quả chỉ ra rằng EtCU không gây độc cấp tính (1000-5000 mg/kg) hoặc bán mãn tính (100-500 mg/kg) ở chuột.
THẨM ĐỊNH QUY TRÌNH PHÂN TÍCH CHÌ TRONG NƯỚC BẰNG PHƯƠNG PHÁP PHỔ HẤP THU NGUYÊN TỬ KẾT HỢP VỚI VẬT LIỆU POLYMER IN DẤU ION
Authors: LÊ ĐỨC HÒA  , NGUYỄN VĂN TRỌNG  , LÊ HOÀI ÂN  , TRẦN THỊ THANH THÚY  
Published: March 2023

Quy trình phân tích chì trong mẫu nước bằng phương pháp phổ hấp thu nguyên tử sử dụng kỹ thuật nguyên tử hóa không ngọn lửa GF-AAS kết hợp với vật liệu polymer in dấu ion Pb2+ đã được thẩm định thành công. Vật liệu in dấu ion Pb2+ được tổng hợp bằng cách sử dụng 1-mercaptoctane; acid methacrylic; Pb(NO3)2; AIBN và EDGMA trong môi trường khí nitơ ở 60 oC trong 5 giờ. Tính chất của vật liệu được phân tích bằng phương pháp kính hiển vi điện tử quét, phổ tán sắc năng lượng tia X, giản đồ nhiễu xạ tia X. Các ion Pb2+ trong mẫu được hấp phụ chọn lọc vào vật liệu, sau đó được giải hấp phụ bằng dung dịch HNO3 và được xác định bằng phương pháp GF-AAS. Với các thông số tối ưu của thiết bị GF-AAS, khoảng nồng độ chì tuyến tính trong khoảng 5÷120 µg/L với R2=0,9977. Giới hạn phát hiện và giới hạn định lượng của phương pháp lần lượt là 1,11 µg/L và 3,32 µg/L. Độ lặp lại ở 3 mức nồng độ 10 µg/L; 20 µg/L; 30 µg/L lần lượt là 9,75 %; 9,07%; 7,22%. Độ tái lặp được thực hiện ở những ngày khác nhau ở 3 mức nồng độ tương ứng ở trên lần lượt là 8,69%; 8,32%; 7,38%. Hiệu suất thu hồi của phương pháp trong khoảng 89,69 ÷ 92,97 %. Phương pháp nghiên cứu được áp dụng để phân tích hàm lượng vết của chì trong các mẫu nước ở thành phố Hồ Chí Minh, tỉnh Long An và được đánh giá theo các quy chuẩn của Bộ Y Tế và Bộ Tài Nguyên Môi Trường.
Study of Vibrating Screen Machine Damage in Stone Crusher and Its Effect on Production Loss in Cement Factory
Authors: Anuar Kaspul , Herisiswanto Herisiswanto , Fahrizqa Aqsal 
Published: March 2023

Vibrating Screen Machine have a crucial role in producing split stone. Vibrating screen machine maintenance is taken after it is in trouble. This is a kind of unplanned maintenance, which risks causing a high quantity of machine breakdowns and will affect to the production capacity. This study analyses data trouble of the vibrating screen machine for five months. The data analysed are the type of disturbance, the amount of production losses and financial losses. The results showed that the largest repair hours due to mechanical problem occurred in the fifth month with a repair time of 75.8 hours and a production loss of 5,269.85 Tons which is equivalent to Rp. 580,382,000,-. Then the largest total repair hours due to the production problem occurred in the second month with a repair time of 32.99 hours and a production loss of 968.49 Tons or equivalent to Rp. 179,385,000,-.
Salah satu jenis mesin yang beperan dalam memproduksi batu split adalah vibrating screen. Perawatan mesin vibrating screen biasanya dilakukan saat mesin mengalami kerusakan. Hal ini adalah bentuk pemeliharaan yang tidak terencana, yang beresiko menimbulkan tingginya kuantitas gangguan pada mesin dan akan mempengaruhi kapasitas produksi. Penelitian ini menganalisa data gangguan dari mesin vibrating screen selama lima bulan. Data yang dianalisis meliputi tipe gangguan, jumlah produksi yang hilang (production losses) dan rugi keuangan. Hasil penelitian menunjukkan total jam perbaikan dengan klasifikasi kerusakan mechanical terbesar terjadi pada bulan ke lima dengan waktu perbaikan selama 75,8 jam dan production loss sebesar 5.269,85 Ton yang setara dengan Rp. 580.382.000,-. Kemudian total jam perbaikan dengan klasifikasi kerusakan production terbesar terjadi pada bulan kedua dengan waktu perbaikan 32,99 jam dan kerugian hasil produksi sebesar 968,49 Ton atau setara dengan sebesar Rp. 179.385.000,-.
Observation of Flow Loss on Pneumatic Fly Ash Transport System in Cement Plant
Authors: Akhbar Muhammad , Fernanda Yolli , Refdinal Refdinal , K Arwizet 
Published: March 2023

Pneumatic conveying is a material transport tool that utilizes compressed air in a pipe that comes from a blower or compressor. The EP dust raw mill material transport equipment is designed using the pneumatic conveying principle which aims to deliver the material optimally to the cement mill. Therefore, this study aims to analyze the fluid flow in the EP dust Raw Mill material transport system pipe which aims to determine the phenomenon of fluid flow in the pipe design and find the head loss of the material transport pipe. This analysis uses a numerical method that is solving problems by being formulated mathematically by calculating operations and assisted by solidworks software. The size of the pipe to be analyzed is 330 meters long with a diameter of 0.2 meters and has 8 elbows and a head loss of 425.53 meters is obtained, while the results of theoretical calculations obtained a major loss of 374.61 meters and a minor loss of 20.87 meters and the total head loss is 395.48 meters.
Pneumatic conveying merupakan alat transpor material yang memanfaatkan udara bertekanan dalam pipa yang berasal dari blower maupun compressor. Alat transpor material EP dust raw mill dirancang menggunakan prinsip pneumatic conveying yang bertujuan untuk menghantarkan material secara optimal menuju cement mill. Oleh karena itu penelitian ini bertujuan untuk menganalisis aliran fluida yang berada didalam pipa sistem transpor material EP dust Raw Mill yang bertujuan untuk mengetahui fenomena aliran fluida pada desain pipa dan mencari head loss dari pipa transpor material tersebut. Analisis ini menggunakan metode numerik yaitu menyelesaikan permasalahan dengan diformulasikan secara matematis dengan cara operasi hitungan dan dibantu oleh software solidworks. Ukuran Pipa yang akan dianalisis sepanjang 330 meter dengan diameter 0,2 meter dan memiliki elbow sebanyak 8 buah dan didapatkan headloss sebesar 425,53 meter sedangkan dari hasil perhitungan teoritis didapatkan major loss sepanjang 374,61 meter dan minor loss sebesar 20,87 meter dan total head lossnya sebesar 395,48 meter.
Car Air Conditioner System Simulator Design for Student Practicum
Authors: Hidayat Nuzul , Giatman M , Muskhir Mukhlidi , Effendi Hansi , Arif Ahmad 
Published: March 2023

This research aims to develop a car air conditioning (AC) simulator. The vehicle's air conditioning system is transferred to a stand panel with an electric motor drive. The selection of an electric motor simplifies operation, maintenance, and practicality because the AC system does not require much time to warm up. The rotation of the electric motor is regulated by an inverter so that the performance of the AC system matches the actual performance. The R and D approach was selected for this investigation. The technique begins with examining an existing simulator, followed by planning, creating, expert validation, and completion of the simulator. The expert validation of the material's feasibility yielded a score of 3.73 with a highly feasible category, a score of 3.45 with a viable category for media, and a score of 3.20 with a feasible category for efficacy. It has been demonstrated that, on average, there is a 36.18 percent improvement in comprehension when this technique is utilized.
Tujuan penelitian ini adalah membuat simulator air conditioner (AC) mobil dengan cara memindahkan sistem AC dari mobil ke panel stand dengan penggerak motor listrik. Pemilihan motor listrik adalah untuk mempermudah pengoperasian, perawatan serta kepraktisan karena tidak butuh waktu yang lama untuk pemanasan sistem AC. Sebuah inverter digunakan sebagai pengatur putaran motor listrik, sehingga kinerja sistem AC sesuai dengan kinerja sebenarnya. Metode R and D dipilih dalam penelitian ini. Metode diawali dengan mengamati simulator yang sudah ada, merencanakan, mengembangkan, melakukan validasi simulator oleh ahli, dan finalisasi simulator. Hasil validasi ahli untuk kelayakan materi memperoleh nilai nilai 3.73 dengan kategori sangat layak, untuk media memperoleh nilai 3.45 dengan kategori layak, serta untuk keefektifan dengan nilai 3.20 dengan kategori layak. Pada saat digunakan, terbukti ada kenaikan pemahaman dengan rerata 36.18%.
Diversity Of Makrozoobenthos As Bioindicators Of The Quality Of The River Aek Kanan
Authors: Harahap Arman 
Published: March 2023

The waters of Kanan is the waters are very widespread in , this area is densely populated, so there are many community activities that take place such as Transportation, Fisheries, Bathing, sand Mining and other.The purpose of this study is to determine the role of macrozoobenthos as a bioindicator of water quality in the waters of Kanan Tapanuli Selatan , as well as determine the quality of water in the flow of the waters Kanan physical properties, chemical has. The research was conducted from November 2019 to February 2019, the samples taken from the three research stations. From the results obtained Macrozoobenthos in the identification in this study consisted of 3 Phyla of invertebrates namely : Annelids, which consists of 2 classes, Arthropods consisting of 1 class and Molusca, which consists of 1 class. Based on the data of macrozoobenthos obtained at each research station, then the obtained value of population density, relative density and frequency of presence of that at station I the value of its highest density is Tubifex sp. with the value of the density of the population of 18,519 individual/m2, the density is relatively 25,862% and the frequency of the presence of 55,555%. off at 3. at station 2 the highest density is Tubifex sp. with the value of the density of the population of 18,519 individuals/m2, relative density 25,862% and a frequency of 55,555%. also note that the total score obtained by the method storet, namely -30, this shows that if connected with the raw water quality of class I is then classified in the waters of class III, which means that light polluted. The high total score method storet on the entire research station due to the presence of a variety of activities at each of the stations, settlements, sand mining and other activities. Where these activities produce waste, which in the end increases the content of Phosfat, COD, TSS and BOD5, thus causing the waters of the Waters of Kanan is light polluted.
Macro : Inflation And Economic Stability In Islam
Authors: Siregar Rahmat Azahar , Abdul Majid M. Shabri 
Published: March 2023

Inflation is a frequent conversation, both in economic meetings and in income-raising talks. Inflation in a country cannot be eliminated, it can only be minimized by indicators held by the government. In this study, it will discuss inflation and economic stability in Islam. This research is a descriptive qualitative research with a Library approach, and is narrated according to the needs of the formulation to be addressed. The results of this study show that the conventional perspective states that the causes of inflation are cost push, demand pull, and mixed (mixed). Meanwhile, the Islamic paradigm emphasizes that inflation is the result of natural error and human error.
Uncovering The Relationships Between Strategic Capability, Strategic Flexibility, And Performance
Authors: Evanthi Ayundha , Azhar Ratih Mukti 
Published: March 2023

Abstract.

Strategic flexibility and strategic capability are seen as strategic activities carried out by companies to compete and adapt to the business environment to achieve the expected performance. The objectives of this research are: (1) examine strategic flexibility, strategic capability, and performance by emphasizing their relationships, dimensions and roles of context (2) identify the relationship between strategic flexibility, strategic capability and performance that can be used for future theory development. This research uses bibliometric analysis to map how strategic flexibility, strategic capability and performance intended from several previous journals using VOSviewer. This research concludes that implementing strategic flexibility and strategic capability will result in effective relationships and good firm performance although strategic flexibility is not directly related to the strategic capability. Performance mediates the influence between strategic flexibility and strategic capability. The strategic flexibility is influenced by product innovation, absorptive capacity, and dynamic capability, in the other hand, strategic capability is influenced by network capability. The implication of this research are following researches can add literatures and new theories on the strategic flexibility and strategic capability so that research and discussion on this object can continue to grow.

Keywords: Strategic Flexibility, Strategic Capability, Performance
Rancang Bangun E-Learning pada Mata Pelajaran Administrasi Sistem Jaringan
Authors: Yusta Afrasim , Hendriyati Penny , Nadia Resma Priska 
Published: March 2023

SMK Negeri 1 Anyer merupakan sekolah menengah kejuruan yang berlokasi di daerah anyer dalam kegiatan belajar mengajarnya masih bersifat konveksional, dengan kata lain bahwa proses belajar mengajar antara siswa dengan pengajar hanya dapat dilakukan dengan cara tatap muka yang dilakukan di kelas. Sedangkan pada SMK Negeri 1 Anyer siswa diwajibkan menjalani Praktik Kerja Lapangan (PKL) selama 1 sampai 3 bulan. Pertemuan antara siswa dengan guru tidak terjadi maka secara otomatis proses pembelajaran pun akan terhambat. Tujuan penelitian adalah merancang dan membangun aplikasi e-learning sebagai media pembelajaran di SMK Negeri 1 Anyer, sehingga siswa - siswi yang sedang menjalankan kegiatan PKL tetap mengikuti pelajaran secara online. Pengembangan sistem menggunakan metode waterfall. Pada metode ini diharapkan dapat melakukan tahapan secara detail dalam membangun suatu sistem. Pemodelan sistem ini menggunakan Unified Modeling Language dan ERD. Dalam penelitian ini e-learning dibangun menggunakan framework laravel.
Strengthening Postharvest Technology Development and Improvement Through Feedback
Authors: Adegbola  , Owojaiye J. A., , Ogunremi O. B., , Aina O. B., , Achime O. B., , Pessu K. C. and 
Published: March 2023

This inquiry is predicated on the datum or truism that all technologies have a gap and or become obsolete at some point, and the utilization of passé technologies and methods predisposes the agricultural sector to underdevelopment. It investigates technological paucities and fixes for NSPRI technologies (NSPRI Smoking Kiln (NSK), Parabolic-shaped Solar Dryer (PSSD), Ice Fish Box® (IFB®), Hermetic Steel Drum (HSD) and Ventilated Plastic Crate (VPC)) from the perspective of users of the technologies. The study adopted a cross-sectional research design using the in person method as its feedback mechanism in 18 states across 6 geopolitical zones in Nigeria. Data were obtained through interview schedules supplemented with key informant interviews while a multi-stage sampling procedure was employed in the selection of respondents. Firstly, eighteen (18) States where NSPRI postharvest technologies have been disseminated and adopted were purposively selected. Secondly, users of improved NSPRI postharvest technologies were selected from diverse locations within the states earlier selected. Non-probabilistic techniques particularly snowballing were also employed at this stage. Frequencies, percentages, means and weighted averages were employed in the analysis of data components. Results showed that 70% of respondents have never provided feedback on NSPRI technologies. Executives of various associations was used by 45% of NSK users, 59% of IFB users, and 48% of VPC users to provide feedback while 43% of PSSD users and 40% of HSD users shared opinions through NSPRI extension staff. In general, there exists a strong (NSK: 94% PSSD: 95.2% IFB®: 91% HSD: 88.6% VPC: 74.5%) willingness to recommend technologies among respondents even as they provided positive feedback on use parameters and components of the technologies. However, respondents opined that the roller and chimney (NSK), durability of polypropylene cover (PSSD), draining of thawed ice (IFB®), and bolted ring (HSD) require improvement.
A study to explore the emotional intelligence and stress coping strategies among nursing students in selected colleges at Namakkal District- Hermeneutic phenomenological circle approach
Authors: Jothilakshmi K. 
Published: March 2023

Background: Emotional intelligence of nursing students helps them to adopt a healthy life style during stress.Coping is one of the wise choices of avoiding frustration which is the end product of stress and burnout. If individual want to handle the stress with effective and appropriate coping he or she should be an emotionally competent with high emotional intelligence. Methods: Participants were selected based on trait exhibited by particular group of interest. So adopted purposive homogenous sampling method for this study. After receiving informed oral consent students at Dhanvantri College of Nursing, Namakkal were adopted as participants for this study .With 5 participant’s data saturation point has been reached and preceded for the analysis. As this study aimed to explore the phenomenon of EI on coping strategy and to provide wide knowledge regarding the phenomenon there was a need to fuse individual’s subjective experience with the hermeneutic circle. So as this study design was Qualitative hermeneutic Phenomenological circle. Age and Birth order of the participants were demographic variable. To understand the concept of EI semi structured questions were framed on the basis of EI domains, all the verbatim reports were analysed by following interpretative phenomenological analysis and coping strategy of participants were expressed by the parent of the participants through mobile phone were recorded and analysed. Results:Participants with high emotional intelligence always deals the stress with their route cause and handle it easily in a problem focused style. Whereas Participants with low emotional intelligence deals stress with emotional focused strategy. And one more new concept (serendipity) were identified that birth order of the participants has greater influence on coping that is those born as second and fourth child shown problem focused coping strategy than the participant who born as first child.
A justiça como artifício, campo simbólico e sistema em aberto: Hume leitor de Hobbes
Authors: Limongi Maria Isabel 
Published: March 2023

Uma das razões pelas quais Hobbes pode ser considerado o precursor do positivismo jurídico é sua maneira de pensar o sistema de justiça como um sistema normativo coerente e completo, autônomo em relação à sua base material, isto é, às opiniões e interesses que motivam e sustentam sua instituição. A teoria hobbesiana do Estado abre assim o caminho para o fechamento da ordem jurídica reivindicado pelos teóricos do positivismo jurídico. No entanto, acompanhando o modo como Hume dialoga com Hobbes e desenvolve sua teoria do Estado, procurarei mostrar que este fechamento não é o único caminho aberto por esta teoria. Hume a explora e tensiona em sentido inverso, procurando pensar a abertura da normatividade jurídica para as opiniões e práticas sociais que a produzem e sustentam.
The emerging role of ferroptosis in myocardial fibrosis of atrial fibrillation
Authors: Yue Honghua , Zhan Yujia , Zhang Zheng , Liang Weitao , Wu Zhong 
Published: March 2023

IntroductionThe aim of this study was to investigate the relationship between ferroptosis and myocardial fibrosis in atrial fibrillation (AF).Material and methodsThe patient’s left atrial appendage tissue was obtained in cardiac surgery. Sirius red staining, Prussian blue and Western blot were used to detect staining to assess histological fibrosis and ferroptosis changes.ResultsThere is a certain correlation between the degree of tissue fibrosis and ferroptosis in AF (r = 0.7763, p = 0.0004). The key proteins related to the regulation of ferroptosis were significantly abnormal in the AF group.ConclusionsFerroptosis is involved in myocardial fibrosis of AF and is a potential target for the diagnosis, prevention and treatment of AF.
Determining the current prevalence of β-thalassemia variants in Jordan
Authors: Hasan Diya , Al Tibi Ahmad , Burghel George , Abdelnour Amid 
Published: March 2023

IntroductionThis study aimed to define and update the prevalence of β-pathogenic thalassemia variants in Jordan.Material and methodsA total of 158 patients with suspected β-thalassemia minor were examined using (CBC and Hb-electrophoresis), and (PCR with hybridization) to identify the type of pathogenic variants.ResultsFive common and seven rare β-thalassemia pathogenic variants were identified in this study. In addition to three variants that had not been previously reported: -101 [C>T], IVS 1.130 [G>C], and codon 44 [-C].ConclusionsThe results provide a new update on the existing Jordanian beta-thalassemia variant database that will aid the enhancement of diagnostic and treatment protocols for patients.
Social Media as Mobile Learning Oral Chat-Based Constructive Communication to Improve Speaking Skills
Authors: Maulina  , Titin Rahmiatin Rahim  , Angelica Ordanza Cortez  , Sheryl Ann V. Narciso  , Anwar Said  
Published: March 2023

WhatsApp is one of the most practical, cost-effective, and communicative mobile applications for college students to enhance their speaking skills. This study reconciled to consuetude college students to flexible habitual use of the English language learning and intended to improve their speaking abilities with specially tailored learning resources and activities aid known as WhatsApp-based speaking instructional material (WABSIM). This exploratory mixed-methods research evaluated oral chat-based utilization of WhatsApp by twenty-eight students for one semester using audio voice messages and video recordings of communicative activities in pairs or groups, dialogues, and interviews activities recorded in the WhatsApp group managed to produce every day classroom and noncollegiate activities. Speaking test consisted of an oral evaluation of student's fluency, vocabulary used, grammar, pronunciation, and comprehensibility aspects. It reveals that students demonstrated a stupendous developing speaking interest in building English sentences by raising questions and delivering responses, improved learning collaboration, created better learning engagement, increased learning self-awareness, and accelerated flexible communication. Besides, students achieved substantial academic progress astoundingly in a semester. Therefore, to emerge the significance acknowledged from this current study, in the current era of mobile technology advancement supporting teaching and learning English, WhatsApp oral chat-based assistance offering teaching and learning English flexibility is the most effective.