bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of an efficient dispersive liquid-liquid microextraction approach combined with spectrophotometry for determination of antiviral drug, valacyclovir HCl in pharmaceutical formulations
Authors: H. Al-Bagawi Amal , Sh. Alenezi Samya , El Sheikh Ragaa , Abdel Fattah Ghada , A. Gouda Ayman 
Published: March 2023

ABSTRACT. A new, fast, sensitive, simple, and green dispersive liquid–liquid microextraction (DLLME)-based spectrophotometric method for the determination of valacyclovir HCl (VAL) in pure form and pharmaceutical formulations has been developed and validated. The developed method is based on the formation of a coloured product through the reaction of VAL and 1,2-naphthoquine-4-sulfonate (NQS) at pH = 9. The important experimental parameters affecting the extraction efficiency were investigated and optimized. The tiny organic droplets had a wavelength of l = 505 nm. At the optimum conditions, linearity ranged from 0.06 to 2.0 μg/mL, with a linear correlation coefficient of 0.9995. The limits of detection and quantification were 0.02, and 0.06 μg/mL, respectively. The enhancement factor was 36.87. Good recovery as accuracy (99.50%) and relative standard deviation (RSD) as precision were 1.20%, respectively. The developed DLLME method was successfully applied to the determination of VAL in pharmaceutical formulations, and the validity was assessed by applying the standard addition technique. The results obtained by the proposed method for the pure VAL and commercial tablets agreed well with those obtained by the official method.

KEY WORDS: Valacyclovir HCl, Spectrophotometry, 1-2-Naphthoquine-4-sulfonate, Dispersive liquid–liquid microextraction, Pharmaceutical formulations

Bull. Chem. Soc. Ethiop. 2023, 37(3), 579-592.
DOI: https://dx.doi.org/10.4314/bcse.v37i3.4
Zeolite-x encapsulated Ni(II) and Co(II) complexes with 2,6-pyridine dicarboxylic acid as catalysts for oxidative degradation of atenolol in an aqueous solution
Authors: Hassani Fatemeh , A. Sharif Mahboubeh , Tabatabaee Masoumeh , Mahmoodi Mahboobeh 
Published: March 2023

ABSTRACT. Complexes of Co(II) and Ni(II) with 2,6-pyridine dicarboxylic acid (PydcH2) have been synthesized in the NaX (zeolite-X) nanopores. The formation of zeolite X encapsulated Co(II) and Ni(II) complexes ([M(pydcH)2]-NaX, [M = Co(II) and Ni(II])] were confirmed using spectroscopic methods of FT-IR, elemental analysis, XRD, FE-SEM, and TEM. It was affirmed that the encapsulation of complexes in NaX pores was formed without changes in the structure and shape of the zeolite. The oxidative degradation reaction of atenolol with hydrogen peroxide as an oxidant was performed in the presence of synthesized [M(pydcH)2]-NaX nanocomposites to study their catalytic activity. Therefore, oxidation of atenolol was performed under different conditions of catalyst, temperature, and time. Under optimal conditions, catalysts [Co(pydcH)2]-NaX and [Ni(pydcH)2]-NaX showed 82.3% and 71.1% activity of atenolol oxidation, respectively. These catalysts were stable after recovery and were used three more times. The results showed that these catalysts were reusable and had a reduction in the catalytic activity of less than ten percent.

KEY WORDS: Zeolite-X, Nano porosity, Ion-exchange, Degradation of atenolol, 2,6-Pyridine dicarboxylic acid

Bull. Chem. Soc. Ethiop. 2023, 37(3), 611-622.
DOI: https://dx.doi.org/10.4314/bcse.v37i3.6
Enhancing farmers’ knowledge on climate-smart agriculture using learning videos in Irepodun LGA, Kwara State
Authors: Alalade O.A. , Adefalu L.L. , Omotesho K.F. , Okpodu V. , Fagbote O.O. 
Published: March 2023

This paper assessed the climate smart agricultural practices using learning videos in Irepodun LGA, Kwara State, Nigeria using qualitative and quantitative methods in data collection. One hundred and forty-eighty farmers were randomly selected using interview schedule. Also, focus group discussions were conducted with 137 participants. Pairwise comparison was used to evaluate the difference between the proportion of household heads who used the videos to learn and those who did not use the videos. The study revealed that farmers have similar perception of climate change and related impacts in video-villages and in non-video-villages. However, the study revealed farmers’ observation of climate change and related impacts are influenced by gender, with men perceiving more climate change and related impacts than women. In non-video villages, few respondents adopted crop rotation, intercropping, crop diversification, and improved short-cycle seed varieties as climate change adaptation strategies. Videos contribute more to the adoption of crop rotation, intercropping and fertilizer application for men than for women. Videos on accounting (managing money) enable more women than men to enhance their cost-benefit evaluation practices for income improvement. During the interviews, women farmers in video-villages were eager to demonstrate their knowledge about cost-benefit evaluation. Furthermore, the yield of sorghum, cassava and maize is higher in video- villages than in non-video-villages. Thus, using videos as an extension tool is suitable for knowledge development and leads to the high adoption of climate-smart agricultural practices for food security.
Determinants of households’ food wastes in Osogbo Metropolis, Osun State, Nigeria
Authors: Busari A.O. , Alabi A.A. , Bayero G.S. , Idris-Adeniyi K.M. 
Published: March 2023

Globally, food wastage is a significant problem. According to the United Nations’ Food and Agriculture organization estimate, one third of human food production is lost or wasted. Waste occurs in all parts of the value chain, from post-harvest processing through the supply chain. This study examined determinants of food waste among households in Osogbo Metropolis, Osun state, Nigeria. Multistage sampling procedure was used to select one hundred and twenty (120) respondents from the study area. Data were collected with structured interview schedule. Frequency counts, means, percentages, and multiple regression analysis were the major statistical tools employed in data analysis. Results of descriptive analysis of the socioeconomic characteristics reveals that majority of the respondents were middle aged, married, female public officers, with averaged sized family. Protein from plant sources and carbohydrate are the most wasted household food items in the households. Protein from plant sources and carbohydrate are the most wasted household food items in the households. Epileptic electricity supply is a major reason for household food wastages, while refrigeration is the most widely used method of preservation among the households. The study concluded that significant quantity of food is wasted among the households. Household size, household food expenditure, the quantity of food consumption, and frequency of food consumption are significant factors influencing the level of households’ food waste in the study area. Thus, strict monitoring of these variables would minimize households’ food waste in the study area.
Adopting a Lean Construction Wheel (LCW) to Tanzanian Construction Firms. A Case of Class I Building Contractors in Dar Es Salaam
Authors: Sifa Phillipo , Mbatta Geoffrey 
Published: March 2023

Purpose: This paper proposes a Lean Construction Wheel (LCW) to be a framework for Tanzanian construction firms. Absence of a lean construction framework brings failure into the implementation of lean construction, and this is attributed to a low level of awareness of lean construction.
Methodology: Quantitative research approach was used to assess the application of LCW principles by 57 Class 1 local building contractors located in Dar es Salaam. The results were analysed through the Statistical Package of Social Science (SPSS) were figured out.
Findings: The findings show that the term lean construction was found to be terminology to Tanzanian contractors, but still, they apply some of the lean construction principles.
Unique Contribution to Theory, Practice and Policy: The effect of the study will enhance the contractors to understand the importance of a lean construction framework and will encourage them to opt for the LCW framework. It will also create an urge to develop more frameworks that are better off for the Tanzanian construction industry
Influence of Knowledge Management Practice on Performance of Manufacturing Firms. A Review of Literature
Authors: Weru Phillis 
Published: March 2023

Purpose: The purpose of this study is to assess the influence of knowledge management practice on the manufacturing firms.
Methodology: The research was carried out with consideration given to previous theoretical literature
Findings: The study revealed that knowledge management has a positive significant impact on the performance of manufacturing companies. It facilitates innovations in production, manufacturing process and stirs operational performance and this helps the company to remain competitive in the market as it’s able to meet customer demands.
Unique Contribution to Theory, Practice and Policy: The authors has highlight on importance of knowledge management practice to improve performance of these firms. The study therefore recommends that all firms should create room for knowledge sharing in their operations to enhance sustainability and continuity of manufacturing sector.
INFLUENCE OF INTRAPERITONEAL ADMINISTRATION OF CERIUM OXIDE ON BLOOD PARAMETERS AND LIPID PROFILE IN MICE (MUS MUSCULUS)
Authors: Sabri Hammid Samaher , Jeber Al-Maliky Sami 
Published: March 2023

Purpose: White laboratory mice Mus musculus L. strain BALB / C were used to study the effects cerium oxide on the hematological parameters and lipid profile values.
Results: Results showed a significant decrease (p≤0.05) in the RBCs' hemoglobin Hb 'and PCV' parameters as well as the presence of a significant in the mean erythrocyte MCV volume in the two doses (2.5'and .3.75) micro liters / kg ' , while there was no significant difference in hemoglobin (MCH) and the mean concentration of hemoglobin in red blood cells (MCHC) when compared with the control group, while the two doses did not differ significantly in PCV, Hb, RBCs, while the two doses differed significantly between them in MCV. There is significant difference in the level of triglycerides (TG, LDL) and HDL (compared with the control group) for both doses, and it was found that there was a significant difference between the low and high dose (2.'3.75) micro liters / kg in the HDL level. TG, LDL) compared with the control group at the probability level (P≤0.05), while there was no difference between the high and low dose in the level of cholesterol and (VLDL).
Impact of Climate Changes on Agriculture and Livestock
Authors: Davis Victor 
Published: March 2023

Purpose: The aim of this study is to assess the impact of climate changes on livestock and agriculture.
Methodology: The study adopted a desktop methodology. Desk research refers to secondary data or that which can be collected without fieldwork.
Findings: The study concluded that the impact of climate change in livestock include changes in water availability, animal growth and milk production, production and quality of feed crop and forage, diseases and reproduction and biodiversity. The agriculture sectors is highly affected by lack of rainfall, raising temperatures and greenhouse gases
Unique Contribution to Theory, Practice and Policy: The study recommends that proper education and training programs for agriculture workers, public officials and the personnel from the related agencies should be developed and put into practice so that they can properly cope with climate change. The study also recommends that policies should be put in place to regulate human activities such as deforestation and release of gases to the atmosphere that contribute to the changes in climate change.
Assessing the Implementation of the Key Tenets of the African Mining Vision with Zambia’s Key Mining Policy on Artisanal and Small Scale Mining
Authors: Siaciti Nachinanga , Masinja Jewette 
Published: March 2023

Purpose: The Africa Mining Vision (AMV) is a policy framework that was created by the African Union in 2009 to ensure that Africa utilizes its mineral resources strategically for broad-based, inclusive development. It is a blueprint tailored at addressing numerous challenges that has faced the sector in the past and at the core, improve the Livelihoods of local communities.
Methodology: The study used desktop literature method. The study involved reviewing the key government policy documents relating to ASM and mining in general. The study reviewed the 7th National development plan, the amended Mines and minerals development Act of 2016 and Mosi-oa-Tunya declaration.
Findings: This article, however, finds that 12 years after its inception, the AMV framework has not been fully implemented to address the critical constraints and leverage success factors in forging the creation of resilient communities around the ASM sub sector.
Unique Contribution to Theory, Practice and Policy: There is generally a low level of awareness of the framework among key stakeholders and there is no clear policy direction, and or gap analysis to determine the obstacles to its implementation. This article derives its findings through accessing the Zambian Mining policy documents on ASM and mapping it with the key tenets of the AMV.
Pengaruh Kemampuan Kerja Pegawai Dan Tunjangan Kesejahteraan Terhadap Prestasi Kerja Pegawai Pada PT Railink Medan ( Kereta Api Bandara )
Authors: Sri Rahayu 
Published: March 2023

PT Railink Medan (Kereta Api Bandara) merupakan sebuah perusahaan swasta (yang merupakan anak perusahaan dari PT Kereta Api Indonesia (Persero) dengan PT Angkasa Pura II (Persero). Permasalahan yang mendasari penelitian ini apakah secara simultan dan parsial kemampuan kerja pegawai dan tunjangan kesejahteraan berpengaruh terhadap prestasi kerja pegawai pada PT. Railink Medan (Kereta Api Bandara. Adapun teknik pengumpulan data dalam penelitian ini dilakukan dengan kuesioner dengan membagikan daftar pertanyaan kepada responden sebanyak 26 responden, Dari hasil uji F atau secara serempak/simultan menunjukkan Berdasarkan hasil pengolahan SPSS Ver. 19.00 menunjukkan nilai Fhitung sebesar 670.763 dengan tingkat signifikan 0,00. Karena Fhitung 670.763 > Ftabel 3.13 dan probabilitas signifikan jauh lebih kecil dari 0,05 yaitu 0,00 < 0,05, maka model regresi dapat dikatakan bahwa Kemampuan Kerja dan Tunjangan Kesejahteraan secara serempak berpengaruh positif dan signifikan terhadap Prestasi Kerja Pegawai di PT Railink Medan (Kereta Api Bandara). Uji Parsial (Uji-t) penelitian menunjukan bahwa : Variabel Kemampuan Kerja nilai thitung 2.562 < ttabel 1.664 dengan signifikan 0.013 < 0,050, artinya secara parsial variabel Kemampuan Kerja berpengaruh positif dan signifikan terhadap Prestasi Kerja pegawai PT Railink Medan (Kereta Api Bandara), maka dapat disimpulkan bahwa hipotesis 1 di terima. Variabel Tunjangan Kesejahteraan nilai thitung 13.393 < ttabel 1.680 dengan signifikan 0,000 < 0,050, artinya secara parsial variabel Tunjangan Kesejahteraan berpengaruh positif dan signifikan terhadap Prestasi Kerja pegawai PT Railink Medan (Kereta Api Bandara), maka dapat disimpulkan bahwa hipotesis 1 di terima. Uji Determinasi besarnya adjusted R square sebesar 0.948 hal ini berarti 94.8% variasi Prestasi Kerja yang bisa dijelaskan dengan variabel independen Kemampuan Kerja dan Tunjangan Kesejahteraan sedangkan sisanya (100% - 94.8% = 6.2%) dapat dijelaskan dengan variabel independen lainnya yang tidak diteliti dalam penelitian ini
Pengaruh Karakteristik Pekerjaan, Fasilitas Kerja Terhadap Kinerja Karyawan Pt. Bank Tabungan Negara Cabang Medan Helvetia Medan
Authors: Napitupulu Daniel 
Published: March 2023

Along with the changes so quickly in aspects of their life, then every company should be able to respond rapidly and the demands was that the more complex the employee desires.
State Savings Bank or BTN is Indonesian State-Owned Enterprises in the form of a limited liability company and is engaged in the banking and financial services.
Employee performance is a determinant of progress or decline of a company. Performance of employees in the company in karekateristik seen through the work given to employees and the company is also working facilities provided by the company.
Hypothesis Test Results karekateristik variable work on employee performance characteristics of jobs obtained results (X1) partially have significant influence on employee performance (Y) PT. Savings Bank Negara (Persero) Tbk Branch Cabang Medan Helvetia Medan. t value obtained for 7949 with a probability value t (Sig) is 0.000 (Sig. <?0, 05). Test results hypothesis variable working facilities to employees performance results obtained working facilities (X2) partially have significant influence on employee performance (Y) PT. Savings Bank Negara (Persero) Tbk Branch Cabang Medan Helvetia Medan. t value obtained was 5,077 with a probability value t (Sig) is 0.000 (Sig. <?0, 05). Calculated F value = 208.648 with a probability value of F (sig) is equal to 0.000 (sig.0, 000 ? ?0, 05). Thus Ho is rejected and Ha accepted. It can be concluded that the characteristics of the job (X1) and working facilities (X2) simultaneously have a significant influence on employee performance (Y) BTN (Persero) Tbk, Cabang Medan Helvetia Medan Branch.
Pengaruh Faktor Pribadi Dan Sosial Terhadap Keputusan Beralih Pekerja Dari Sektor Pertanian Ke Sektor Non Pertanian Di Kecamatan Sei Balai Kabupaten Batubara
Authors: Damanik Darwin Sahat Hamonangan 
Published: March 2023

Banyaknya lahan-lahan pertanian di Kecamatan Sei Balai Kabupaten Batubara yang dijual untuk pemukiman penduduk dan pendirian kantor-kantor pemerintahan menyebabkan luas lahan yang semakin sempit tersebut menjadi tidak ekonomis dalam berproduksi, sehingga hasil yang didapat sedikit. Hal ini mengakibatkan pendapatan petani berkurang, sehingga mengakibatkan banyaknya tenaga kerja yang beralih pekerjaan ke sektor non pertanian untuk mendapatkan pendapatan yang tinggi guna memenuhi kebutuhan mereka.
Penelitian ini bertujuan untuk menjelaskan pengaruh faktor pribadi dan faktor sosial terhadap beralihnya tenaga kerja dari sektor pertanian ke sektor non pertanian. Penelitian ini menggunakan metode deskriptif kuantitatif. Responden pada penelitian ini adalah masyarakat Kecamatan Sei Balai Kabupaten Batubara yang sebelumnya bekerja sebagai petani yang menggarap sawah dan kemudian beralih ke sektor non pertanian. Jumlah populasi yang digunakan sebanyak 90 orang tenaga kerja.
Analisis Pengaruh Efisiensi Modal Kerja, Likuiditas, Dan Solvabilitas Terhadap Profitabilitas
Authors: Mahulae David Yanto Daniel 
Published: March 2023

Tujuan penelitian untuk mengetahui bagaimana dan seberapa besar pengaruh efisiensi modal kerja, likuditas dan solvabilitas terhadap profitabilitas baik secara parsial maupun simultan pada perusahaan-perusahaan industri barang konsumsi yang go public di BEI tahun 2002-2005. Populasi dalam penelitian ini perusahaan kelompok industri barang konsumsi yang sudah go public di BEI periode tahun 2002-2005. sampel yang diteliti sebanyak 20 perusahaan dengan cara purposive sampling. Variabel yang diteliti meliputi efisiensi modal kerja (WCT), likuiditas (CR), solvabilitas (DTA) sebagai variabel bebas dan profitabilitas (ROI) sebagai variabel terikat. Data diperoleh melalui data sekunder dari BEI dan dianalisis menggunakan regresi berganda. Hasil analisis regresi menunjukkan efisiensi modal kerja, likuiditas dan solvabilitas berpengaruh terhadap profitabilitas pada perusahaan industri barang konsumsi yang terdafatar di BEI dari tahun 2002-2005 yaitu sebesar 87,3% terbukti dari pvalue = 0,000 < 0,05. Secara parsial efisiensi modal kerja berpengaruh positf dan signifikan terhadap profitabilitas, namun likuiditas dan solvabilitas tidak berpengaruh signifikan terhadap profitabilitas. Berdasarkan hasil penelitian maka disarankan kepada pihak manajemen untuk mempertahankan efisiensi modal kerjanya dan perusahaan harus mengelola likuiditas dan solvabilitasnya secara efektif dan efisien untuk menghasilkan laba usaha yang memadai.
Peranan Konsep Kepemimpinan Dalam Organisasi
Authors: Harahap Drajat Syaw 
Published: March 2023

Penulisan artikel ini bertujuan untuk mengetahui peranan konsep kepemimpinan dalam organisasi. Metode penulisan menggunakan metode library research. Dari hasil pembahasan dapat disimpulkan bahwa keteladanan, sikap menghormati dan menghargai orang lain, peduli, adil dan tanggung jawab merupakan karakter dari seseorang yang layak dijadikan atau disebut sebagai pemimpin. Akhirnya seseorang dapat disebut sebagai pemimpin adalah apabila ia mampu menjadi pribadi yang segala tindakan dan perilakunya dapat menjadi inspirasi bagi orang lain untuk bergerak atau berubah menuju pada perbaikan
Analisis Sistem Rekrutmen Dan Komunikasi Terhadap Kinerja Karyawan Pt Bank Mandiri (Persero) Tbk Cabang Imam Bonjol Medan
Authors: Murniyanti Sri 
Published: March 2023

PT Bank Mandiri (Persero) Tbk Cabang Imam Bonjol Medan yang bergerak di bidang perbankan, Sebagai badan usaha yang bergerak di bidang pelayanan masyarakat Permasalahan dalam penelitian ini, baik secara simultan dan parsial apakah Sistem Rekrutmen Dan Komunikasi Terhadap Kinerja Karyawan PT Bank Mandiri (Persero) Tbk Cabang Imam Bonjol Medan. Adapun teknik pengumpulan data dalam penelitian ini dilakukan dengan kuesioner dengan membagikan daftar pertanyaan kepada responden sebanyak 92 responden melalui bantun program Statitical Product Service Solution (SPSS) Versi 19.00, Dari hasil uji F bahwa Sistem Rekrutmen Dan Komunikasi Terhadap Kinerja Karyawan PT Bank Mandiri (Persero) Tbk Cabang Imam Bonjol Medan, sedangkan secara parsial variabel Sistem Rekrutmen Dan Komunikasi juga berpengaruh positif dan signifikan terhadap Kinerja Karyawan dapat disimpulkan secara dominan kedua variabel tersebut mempengaruhi Kinerja Karyawan sebesar 97.5% sedangkan sisanya 2.5% dapat dijelaskan dengan variabel independen lainnya seperti kompensasi, gaya kepemimpinan dan lingkungan kerja
Pengaruh Pemasaran Relasional Dan Loyalitas Terhadap Kepuasan Nasabah Pt. Bank Negara Indonesia (BNI) Kantor Cabang Medan
Authors: Syafriadi Syafriadi 
Published: March 2023

Bank Negara Indonesia berdiri sejak 1946, BNI yang dahulu dikenal sebagai Bank Negara Indonesia, merupakan bank pertama yang didirikan dan dimiliki oleh Pemerintah Indonesia.

Kepuasan nasabah dapat diciptakan melalui kualitas pemasaran yang diberikan oleh perusahaan kepada para pelanggannya. Semakin baik kualitas pelayanannya, akan semakin tinggi pula loyalitas pelanggan terhadap perusahaan tersebut yang akan meciptakan kepuasan nasabah tersebut dengan sendirinya.
Hasil Uji Hipotesis variabel pemasaran reasional (X1) terhadap kepuasan nasabah di peroleh hasil karakteristik pekerjaan pemasaran relasional (X1) secara parsial mempunyai pengaruh yang signifikan terhadap kepauasan nasabah (Y) PT. Bank Negara Indonesia (Persero) Tbk Cabang Medan. diperoleh nilai t hitung sebesar 3,937 dengan nilai probabilitas t (Sig) adalah 0,000 (Sig.<?0,05). Hasil Uji Hipotesis variabel loyalitas terhadap kepuasan nasabah di peroleh hasil variabel Loyalitas (X2) secara parsial mempunyai pengaruh yang signifikan terhadap kepauasan nasabah (Y) PT. Bank Negara Indonesia (Persero) Tbk Cabang Medan.. diperoleh nilai t hitung sebesar 5.077 dengan nilai probabilitas t (Sig) adalah 0,000 (Sig.<?0,05). Nilai F hitung = 127,675 dengan nilai probabilitas F (sig) adalah sebesar 0,000 (sig.0,000??0,05). Dengan demikian Ho ditolak dan Ha diterima. Dapat disimpulkan bahwa pemasaran relasional (X1) dan loyalitas (X2) secara simultan mempunyai pengaruh yang signifikan terhadap kepuasan nasabah (Y) PT Bank Negara Indonesia (Persero) Tbk, Cabang Medan.