bluuebunny/crossref_metadata_2025_split huggingface dataset:
Considerations on bio-hydrogen production from organic waste in South African municipalities: A review
Authors: Dell’Orto Andrea , Trois Cristina 
Published: August 2022

Organic waste disposal contributes to 3.8% of GHG emissions to the atmosphere, yet 68.8% of this putrescible waste fraction is still disposed of, untreated, to landfills in South Africa. The implementation of a ban on disposal of organic waste to landfills at provincial level opens up the need to research best technology pathways and waste minimisation strategies to valorise and promote the circularity of diverted waste streams. The SARChI Chair in Waste and Climate Change has developed the WROSETM (Waste Resource Optimization Scenario Evaluation) model to assist municipalities in selecting the most appropriate waste management solutions. A research gap has been identified in the lack of information on full-scale applications of two-stage anaerobic digestion (2-stage AD) for combined bio-hydrogen and bio-methane production from organic waste. waste. In this review, we explore drivers and barriers to the implementation of 2-stage AD in South Africa and propose possible scenarios using the WROSETM model for its insertion into an Integrated Waste Management System at municipal level. A literature analysis suggests that 2-stage AD is a potentially viable solution to recover the inherent value of organic waste and promote circularity using bio-hydrogen and bio-methane. However, the currently available organic fraction in the municipal solid waste streams is not a suitable feedstock, as it requires high levels of pre-treatment. Suitable scenarios using the WROSETM model are proposed for South African municipalities, paving the way for future research towards the scale-up of this technology.Significance:

Organic waste is not managed adequately in South Africa, contributing to greenhouse gas emissions without recovering the intrinsic value of the material.
2-stage AD is a potentially viable solution to recover the inherent value of organic waste and promote circularity using bio-hydrogen and bio-methane. Several barriers must be overcome before carrying out the technology at full-scale.
A 2-stage AD scenario can be implemented at full-scale into an Integrated Waste Management System using appropriate decision-making tools such as WROSETM.
Circular closed-loop waste biorefineries: Organic waste as an innovative feedstock for the production of bioplastic in South Africa
Authors: Moodley Preshanthan , Trois Cristina 
Published: August 2022

The impact of landfills on the environment has come under increasing scrutiny in recent years due to the confounding effects of climate change and water scarcity. There is an urgent need to reduce from landfills the greenhouse gas emissions that cause climate change, and to provide effective treatment solutions for waste, thereby diverting it from landfills. With an estimated 80 million tonnes of plastic waste entering the world’s oceans annually, the accumulation of marine plastic has become a global crisis. Plastic pollution threatens food safety and quality, human health and coastal tourism, and contributes to climate change. For these reasons, there is an urgent need to explore a bioplastic biorefinery process. This review paper examines the potential of organic waste as an alternative carbon source in the efficient and feasible microbial production of polyhydroxyalkanoate (PHA) and polyhydroxybutyrate (PHB), which are precursors for bioplastic. More specifically, this paper presents a concept for a bioplastic biorefinery from a technological perspective, based on data from previous studies. Biofuel production processes are also assessed with the aim of integrating these processes to construct a bioplastic waste biorefinery. Garden refuse and food waste have been shown to be feasible feedstocks for the production of PHA and PHB in singular processes. Diverting these wastes away from landfills will significantly ease the environmental impacts currently associated with their disposal.Significance:

A bioplastic biorefinery is a viable alternative to treat municipal organic waste.
Several biofuel production processes can be integrated into a bioplastic biorefinery system.
Organic waste is poorly managed in South Africa, resulting in greenhouse gas emissions.
Several barriers and considerations must be overcome before implementing the technology at full scale.
Waste characterisation in Stellenbosch Local Municipality, South Africa
Authors: Nell Charlotte M. , Schenck Catherina , De Waal Jan 
Published: August 2022

This article demonstrates how household solid waste (HSW) generation patterns differ in neighbourhoods of the same town by determining the composition of the residual portion of the HSW stream in 2017 in Stellenbosch. HSW was collected from 10 pre-identified suburbs out of a total of 48. These chosen suburbs and their 17 830 households were representative of all the HSW from all households in the catchment area of the Devon Valley Landfill Site. A separation at source programme was in place in nine of the suburbs.The confidence level and level of precision were set at 95% and ±8%, respectively. A total of 1543 bags of HSW were collected with a total mass of 5748.01 kg and an uncompacted volume of 84.87 m3. The samples were sorted into 7 main and 18 final fractions. The main contributor to the total waste stream was organic waste by weight (35%) and plastic wrap and packaging by uncompacted volume (32%). The average HSW generation was 0.68 kg/capita/day. Households with access to a separation at source programme tended to have lower levels of highly recyclable materials in their samples. Roll-out of a separation programme is recommended for all 48 suburbs in the study area to save landfill airspace. Correlation analysis showed that household size influenced three of the seven main waste fractions, and household income five of the seven. No statistically significant results were obtained relating to household density and waste generation. Statistically significant results were obtained through an analysis of variance for all waste fractions, excluding organics, when considering household income, indicating that both household size and income could be explanatory socio-economic factors for variations seen. Other variables, such as human behaviour, could potentially also contribute to the differences and should be further explored.Significance:

The availability of reliable waste composition data is not only a contribution to the solid waste management field, but also to any related fields interested in beneficiating or recovering waste. Thesedata are often unavailable, but form the basis for decision-making processes when addressing solid waste (and related) challenges.
Professional quality of life of health care providers in Bishnupur district, Manipur: a cross sectional study
Authors: Gupta Avantika , Akoijam Pooja , Mukherjee Abhishek , Akoijam Brogen Singh 
Published: August 2022

Background: ProQOL is the quality of life related to professional attributes. It has a direct impact not only on mental wellness of the healthcare worker but can affect day to day decision making required in his services. Objectives of current study was to determine ProQOL of health care providers and to assess the association between ProQOL and demographic variables of interest.Methods: A cross sectional study was conducted among 153 health care providers of Bishnupur district, Manipur selected by random sampling during August-September, 2021 using ProQOL-5 questionnaire. Univariate analysis was done, followed by Chi-square test and Pearson Correlation for assessing association.Results: Mean age was 37.54±9.1 years and 64.1% were females. 46.4% were from District Hospital, 27.5% from CHC and 26.1% from PHC. 32.7% were nurses followed by physicians (25.5%). Mean values for compassion satisfaction (CS), secondary traumatic stress (STS), burnout (BO) was 36.84±5.2, 23.2±4.5 and 23.3±5.6 respectively. Majority had moderate CS (79.1%), BO (54.9%) and STS (52.3%). BO and STS were positively correlated (r=0.552, p=0.000). 63.6% working both day and night shifts had more BO (p=0.05). Those working for ≥8 hrs more often felt trapped as their job as a helper (p=0.031).Conclusions: Majority had moderate CS, STS and BO level. Stress management and coping skills training can be considered as a measure to decrease significant BO, STS and increase CS.
Isolation and Evaluation of Collagen from the Fish (Thunnus Tonggol) Skin: A Biological Material for Medical Tissue Engineering
Authors: Samiei Mohammad Hadi , Jamili Shahla , Nikukar Habib , Razban Vahid 
Published: August 2022

Introduction: Collagen bears many applications in pharmacy and medicine, health and cosmetic products as well as food industry. In recent years, much attention has been paid to separation of collagen from marine organisms arising from the fact that its use in the diet is not restricted and triggers no risk of contagious diseases as well as religious restrictions. Moreover, fish collagen is unique in terms of its extremely high solubility in dilute acid on a scale with mammalian and chicken collagen. The purpose of this study was to investigate the isolation and evaluation of collagen from fish skin (Thunnus tonggol) as a biological material for medical tissue engineering.
Methods: Acid-soluble collagen (ASC) was isolated from fish skin using acetic acid. The Thunnus tonggol skin collagen was extracted by acid and base methods and evaluated by PAGE-SDS, FTIR and UV spectrophotography and amino acid composition analysis.
Results: The results, predicated on SDS-PAGE and amino acid compositions, demonstrated that the fish skin collagen is of type I. Fourier transform infrared analysis also revealed helical compositions of both collagens. UV spectrophotometry in the Thunnus tonggol skin collagen indicated a maximum absorption of 235 nm. The amount of collagen extracted from the Thunnus tonggol skin turned out to be 17.3%. Through analysis of collagen amino acid extracted from the mentioned fish, glycine was predominant. The growth and proliferation of human fibroblast cells on the collagen extracted from the Thunnus tonggol skin was more than control.
Conclusion: The results revealed that the fish collagen is an accessible and advantageous material for medical usage and tissue engineering.
CORRELATION BETWEEN PARENTAL INVOLVEMENT AND MATHEMATICS LEARNING OUTCOMES TO FOURTH GRADE STUDENTS OF PUBLIC ELEMENTARY SCHOOLS IN PREMBUN SUB-DISTRICT IN ACADEMIC YEAR OF 2020/2021
Authors: Safitri Linda , Chamdani Muhamad , Hidayah Ratna 
Published: August 2022

<p><strong>Abstrak: </strong>Penelitian ini bertujuan untuk menemukan ada tidaknya hubungan antara pendampingan orang tua dan hasil belajar matematika siswa kelas IV SDN se-Kecamatan Prembun dan mengukur besarnya sumbangan terhadap hasil belajar matematika siswa kelas IV SDN se-Kecamatan Prembun tahun ajaran 2020/2021. Penelitian ini merupakan penelitian kuantitatif dengan metode korelasi. Pengambilan sampel menggunakan <em>cluster random sampling</em> dengan SPSS. Jumlah sampel penelitian 232 siswa di sebelas SDN se-Kecamatan Prembun. Pengambilan data menggunakan angket dan tes. Analisis data yang digunakan yaitu uji korelasi sederhana dan sumbangan efektif dengan taraf signifikansi 5%. Pada pengujian korelasi didapatkan sig = 0,000 (sig &lt; 0,05) dengan hasil koefisien korelasi antara pendampingan orang tua dan hasil belajar matematika yaitu 0,405. Berdasarkan hasil penelitian, disimpulkan bahwa ada korelasi positif dan signifikan antara pendampingan orang tua dan hasil belajar matematika siswa kelas IV SDN se-Kecamatan Prembun tahun ajaran 2020/2021 dengan pendampingan orang tua memberikan sumbangan sebesar 16,40 % terhadap hasil belajar matematika.</p><p><strong> </strong></p><p> </p><p> </p>
PENGARUH PERHATIAN ORANG TUA TERHADAP HASIL BELAJAR MATEMATIKA SISWA KELAS IV SDN SEKECAMATAN BULUSPESANTREN TAHUN AJARAN 2020/2021
Authors: Aliffah Aliffah , Susiani Tri Saptuti , Rokhmaniyah Rokhmaniyah 
Published: August 2022

<p>Hasil belajar adalah kecakapan atau kemampuan yang didapatkan dari pengalaman belajar siswa, mencakup aspek kognitif, afektif, dan psikomotor yang diukur melalui tes maupun nontes dan hasilnya dinyatakan dalam bentuk skor atau nilai. Hasil belajar dipengaruhi oleh faktor internal dan faktor eksternal. Perhatian orang tua merupakan salah satu faktor eksternal dalam pemerolehan hasil belajar. Penelitian ini bertujuan untuk: (1) mengetahui adanya pengaruh positif perhatian orang tua terhadap hasil belajar matematika siswa, (2) menganalisis besarnya sumbangan efektif perhatian orang tua terhadap hasil belajar matematika siswa. Penelitian ini merupakan penelitian kuantitatif dengan metode survei serta menggunakan analisis korelasi, regresi sederhana, uji t dan sumbangan efektif. Hasil penelitian ini menunjukkan (1) perhatian orang tua berpengaruh positif terhadap hasil belajar matematika dengan nilai r hitung (0,509) &gt; r tabel (0,123) dan persamaan regresi Y = -42,918 + 1,229X serta nilai t<sub>hitung </sub>(9,432) &gt; t<sub>tabel </sub>(1,969), (2) Perhatian orang tua memberikan sumbangan efektif sebesar 25,9% terhadap hasil belajar matematika.</p>
PENGARUH KETERLIBATAN ORANG TUA DALAM BELAJAR TERHADAP PRESTASI AKADEMIK SISWA KELAS V SEKOLAH DASAR NEGERI SEKECAMATAN BULUSPESANTREN TAHUN AJARAN 2020/2021
Authors: Aminati Kuni , Rokhmaniyah Rokhmaniyah , Chamdani Muhamad 
Published: August 2022

<p>Prestasi akademik adalah hasil akhir untuk mengukur pencapaian yang diperoleh siswa dari aktivitas belajar yang diwujudkan dalam bentuk angka setelah melewati proses penilaian yang telah ditentukan. Prestasi akademik dipengaruhi oleh faktor internal dan faktor eksternal. Keterlibatan orang tua merupakan salah satu faktor eksternal dalam pemerolehan prestasi akademik. Penelitian ini bertujuan untuk (1) mengetahui adanya pengaruh positif keterlibatan orang tua terhadap prestasi akademik siswa, (2) menganalisis seberapa besar sumbangan keterlibatan orang tua terhadap prestasi akademik siswa. Penelitian ini merupakan penelitian kuantitatif dengan metode survei serta menggunakan analisis korelasi, regresi linear sederhana, uji t, dan sumbangan efektif. Hasil penelitian ini menunjukkan (1) keterlibatan orang tua berpengaruh positif dan siginifikan terhadap prestasi akademik siswa dengan t<sub>hitung</sub> (8,791) &gt; t<sub>tabel</sub><sub> (</sub>1,968), (2) keterlibatan orang tua memberikan sumbangan sebesar 21,5% terhadap prestasi akademik siswa Dengan demikian, keterlibatan orang tua memberikan pengaruh positif terhadap prestasi akademik siswa sebesar 21,5%.</p>
PENGARUH POLA ASUH ORANG TUA TERHADAP HASIL BELAJAR MATEMATIKA SISWA KELAS IV SDN SEKECAMATAN KUTOARJO TAHUN AJARAN 2020/2021
Authors: Saputri Lia Mei , Suhartono Suhartono , Wahyudi Wahyudi 
Published: August 2022

<p><strong>Abstrak</strong></p><p>Hasil belajar merupakan proses untuk melihat sejauh mana siswa menguasai pembelajaran setelah mengikuti proses belajar mengajar. Salah satu faktor yang memengaruhi hasil belajar yaitu faktor eksternal. Dalam penelitian ini faktor eksternal yang dimaksud adalah pola asuh orang tua. Peneltian ini bertujuan untuk (1) membuktikan adanya pengaruh dan mengetahui seberapa besar pengaruh pola asuh demokratis terhadap hasil belajar maematika, (2) membuktikan adanya pengaruh dan mengetahui seberapa besar pengaruh pola asuh otoriter terhadap hasil belajar maematika, (3) membuktikan adanya pengaruh dan mengetahui seberapa besar pengaruh pola asuh permisif terhadap hasil belajar matematika. Penelitian ini merupakan penelitian kuantitatif dengan metode penelitian korelasi dan pengujian hipotesis menggunakan analisis varian satu jalur. Populasi penelitian ini berjumlah 794 siswa dengan jumlah sampel 270 siswa kelas IV SDN se-Kecamatan Kutoarjo. Teknik pengumpulan data menggunakan tes dan angket, data dianalisis menggunakan aplikasi <em>SPSS</em> versi 21. Hasil penelitian ini menunjukkan (1) Pola asuh demokratis berpengaruh terhadap hasil belajar matematika siswa kelas IV SD sebesar 83,1% dan sisanya dipengaruhi faktor lain, (2) Pola asuh otoriter berpengaruh terhadap hasil belajar matematika siswa kelas IV SD sebesar 23% dan sisanya dipengaruhi faktor lain, (3) Pola asuh permisif berpengaruh terhadap hasil belajar matematika siswa kelas IV SD sebesar 65,6% dan sisanya dipengaruhi faktor lain.</p>
PENERAPAN MODEL SCIENTIFIC READING BASED-PROJECT (SRBP) UNTUK MENINGKATKAN KOMUNIKASI DAN PEMAHAMAN KONSEP IPA TENTANG GAYA PADA KELAS IV SDN WIRONATAN TAHUN AJARAN 2019/2020
Authors: Imadudin Hanif , Rokhmaniyah Rokhmaniyah , Suryandari Kartika Chrysti 
Published: August 2022

<p><strong>Abstract</strong></p><p><em>Understanding concepts is crucial for elementary school students since it effects the next concept. Communication is the main key in the learning. This study aims to improve students' understanding of science concepts and communication about force by applying the Scientific Reading Based-Project (SRBP) model. The method was classroom action research conducted in two cycles. The research subjects were teachers and fourth grade students of SDN Wironatan. Data collection techniques used observation, interviews, tests, and questionnaires. The data validity used triangulation of techniques and triangulation of sources. Data analysis techniques included data reduction, data presentation, and conclusions. The results showed that students' understanding of science concepts and communication increased after applying the SRBP model. It concludes that </em><em>the application of the Scientific Reading Based-Project (SRBP) improves understanding and communication the concept on natural science about force.</em><em></em></p><p><strong>Keywords: </strong><em>Scientific Reading Based-Project </em>(SRBP) <em>model</em><strong>, </strong><em>understanding concepts</em><strong>, </strong><em>science communication</em></p><p><em> </em></p><p><strong>Abstrak</strong></p><p>Pemahaman konsep menjadi hal yang penting untuk dikuasai siswa sekolah dasar dikarenakan konsep yang dikuasai akan mempengauhi penguasaan konsep selanjutnya.Komunikasi menjadi kunci utama dalam berjalannya pembelajaran. Penelitian ini bertujuan meningkatkan pemahaman konsep dan Komunikasi IPA siswa tentang gaya dengan mengggunakan model <em>Scientific Reading Based-Project </em>(SRBP). Metode yang digunakan pada penelitian ini adalah penelitian tindakan kelas yang dilakukan dengan dua siklus. Subjek penelitaian adalah guru dan siswa kelas IV SDN Wironatan. Teknik pengumpulan data menggunakan observasi, wawancara, tes, dan angket. Validitas data menggunakan triangulasi teknik dan sumber. Teknik analisis data meliputi reduksi data, penyajian data, dan kesimpulan. Hasil penelitian menunjukkan pemahaman konsep dan komunikasi IPA siswa mengalami peningkatan setelah menggunakan model <em>Scientific Reading Based-Project </em>(SRBP). Simpulan dari penelitian ini adalah penerapan model SRBP<em> </em>dapat meningkatkan komunikasi dan pemahaman konsep IPA tentang gaya.</p><p> </p><p><strong>Kata kunci:</strong> model <em>Scientific Reading Based-Project </em>(SRBP)<em>, pemahaman konsep, komunikasi IPA </em></p>
PENGARUH PEMBELAJARAN JARAK JAUH TERHADAP MOTIVASI BELAJAR SISWA KELAS IV SD SE-KECAMATAN PADAMARA TAHUN AJARAN 2021-2022
Authors: Tantifah Laras Nur , Rokhmaniah Rokhmaniah , Wahyudi Wahyudi 
Published: August 2022

<p><strong>Abstract</strong></p><p><em>The study aimed to examine the influence of distance learning on learning motivation to fourth grade students of public elementary schools in Padamara sub-district in academic year of 2020/2021. It used quantitative design with correlation research methods. The samples were 192 fourth grade students in 9 elementary schools in Padamara sub-district. The sampling method used probability sampling technique of random sampling. The data collection technique used questionnaires. The data analysis used simple correlation test and a simple linear regression test using the SPSS 21 application with a significance level of 5%. The result indicated that the r<sub>count</sub> values between distance learning and learning motivation were </em>0.132&lt;0.138<em> on the students and </em>-0.295&lt;0.632 <em>on the teacher. It meant that there could not find significant influence of distance learning variables on students’ learning motivation variables. To the students, the distance learning contributed 1.79% on students’ learning motivation and the remaining 98.21% was influenced by other factors. To the teacher, the effective contribution value was 8.7%, and the remaining 91.3% was influenced by other factors. It concludes that distance learning does not have significant influence on the learning motivation to fourth grade students of public elementary schools in Padamara sub-district in academic year of 2020/2021.</em></p><p><strong><em> </em></strong></p><p><strong><em>Keywords: </em></strong><em>distance learning, learning motivation </em></p><p> </p><p>Penelitian ini bertujuan membuktikan adanya pengaruh pembelajaran jarak jauh terhadap motivasi belajar siswa kelas IV SD se-Kecamatan Padamara tahun ajaran 2021-2022. Desain penelitian yang digunakan adalah kuantitatif dengan metode penelitian korelasi. Sampel penelitian yaitu 192 siswa kelas IV dari 9 sekolah dasar di Kecamatan Padamara, diambil secara acak dengan teknik <em>simple random sampling.</em><em> </em>Teknik pengumpulan data menggunakan angket. Analisis data yang digunakan yaitu uji korelasi sederhana dan uji regresi linier sederhana menggunakan aplikasi <em>SPSS</em><em> 21</em> dengan taraf signifikansi 5%. Hasil korelasi antara pembelajaran jarak jauh dan motivasi belajar dari pihak siswa mendapat nilai r hitung sebesar 0.132&lt;0.138, dan hasil korelasi dari pihak guru, memperoleh nilai r hitung sebesar -0.295&lt;0.632. Nilai sumbangan efektif pembelajaran jarak jauh terhadap motivasi belajar dari pihak siswa sebesar 1.79%, sedangkan nilai sumbangan efektif dari pihak guru sebesar 8.7%,. Kesimpulannya adalah tidak terdapat pengaruh signifikan pembelajaran jarak jauh terhadap motivasi belajar siswa kelas IV SD se-Kecamatan Padamara tahun ajaran 2021-2011</p><p><strong> </strong></p><p><strong>Kata kunci: </strong><em>pembelajaran jarak jauh, motivasi belajar</em></p>