bluuebunny/crossref_metadata_2025_split huggingface dataset:
Biodegradation of Chicken Feather Wastes in Submerged Fermentation Containing High Concentrations of Heavy Metals by Bacillus sp. khayat
Authors: Ahmad Siti Aqlima , Yusoff Ibrahim , Shukor Mohd Yunus Abd , Phang Lai Yee , Syed Mohd Arif 
Published: April 2022

The increasing use of feather in removing heavy metals from water continues to generate feather wastes contaminated with heavy metals which make it difficult for feather-degrading bacteria to degrade them. In this study, the capacity of Bacillus sp. khayat to grow, produce keratinase and degrade chicken feathers contaminated with various heavy metals, chemicals and surfactants was investigated. The results showed that keratinase activity, feather degradation and the bacterial growth increases with an increase in concentration up to 10 ppm for certain metals, 15 ppm for Cr and Zn and up to 20 ppm for Cu. CaCl2 and Fe2SO4 have negative effect on growth, KA and feather degradation when placed in medium or in cell free crude keratinase except Ca ion which affect crude crude keratinase less. Feather degradation was enhanced at 5 ppm in Pb, Ni, As, Cr and Cu. However, Hg showed decreased feather degradation after 1 ppm. About 90-100 % feather were degraded in the presence of 10 ppm Ni, Ag, Cr, Zn and Co. Ni, Ag, Zn and Cu were the best tolerated metals. Bacillus sp. khayat, with a relatively high tolerance to heavy metals while still maintaining its feather-degrading activities, appears to be a bacterial model for toxicenvironmental waste.
Outlier Analysis of the Buchanan-three-phase Model used in Fitting the Growth of Paracoccus sp. SKG on Acetonitrile
Authors: Gunasekaran Baskaran , Shukor M.S. , Masdor N.A. , Shamaan N.A. , Shukor M.Y. 
Published: April 2022

Organonitriles are widely used in industry such as the synthesis of plastics, rubber, herbicides, pharmaceuticals, drug intermediates, and pesticides. They are carcinogenic and mutagenic. Bioremediation of acetonitrile, an organonitrile, has been touted as a more economical and feasible method compared to physical and chemical approaches. In this work, we model the growth of growth of Paracoccus sp. SKG on acetonitrile from published literature to obtain vital growth constants. We discovered that the Buchanan-three-phase model via nonlinear regression utilizing the least square method was the very best model to explain the growth curve. However, the use of statistical tests to choose the best model relies heavily on the residuals of the curve to be statistically robust. More often than not, the residuals must be tested for the presence of outliers (at 95 or 99% of confidence). In this work, the Grubbâ€™s test to detect the presence of outlier in the growth model was carried out.
Test of Randomness of Residuals for the Buchanan-three-phase Model used in the Fitting the Growth of Paracoccus sp. SKG on Acetonitrile
Authors: Gunasekaran Baskaran , Shukor M.S. , Masdor N.A. , Shamaan N.A. , Shukor M.Y. 
Published: April 2022

Organonitriles are classified as priority pollutants. They are carcinogenic and mutagenic. Bioremediation of acetonitrile, an organonitrile, has been touted as a more economical and feasible method compared to physical and chemical approaches. In this work, we model the growth of growth of Paracoccus sp. SKG on acetonitrile from published literature to obtain vital growth constants. We discovered that the Buchanan-three-phase model via nonlinear regressionutilizing the least square method was the very best model to explain the growth curve. An important consideration that has not been highlighted enough is that the residuals of the model must be random. In order for randomness to be met, we perform the Waldâ€“Wolfowitz runs test. The results showed that the number of runs was 5, the expected number of runs under the assumption of randomness was 3.857, indicating the series of residuals had adequate runs. The pvalue obtained was greater than 0.05, therefore the null hypothesis is not rejected indicating no convincing evidence of non-randomness of the residuals and they do represent noise.
Testing the normality of residuals on regression model for the growth of sludge microbes on PEG 600
Authors: Halmi Mohd Izuan Effendi , Shukor Mohd Shukri , Masdor Noor Azlina , Shamaan Nor Aripin , Shukor Mohd Yunus 
Published: April 2022

Polyethylene glycols (PEGs) are employed in numerous sectors. PEGs are nephrotoxic and their biodegradation by microbes could be a potential tool for bioremediation. Numerous bacterial growth studies neglect primary modelling even though modelling exercises can reveal important parameters. Previously, we have utilized several growth models to model the growth of sludge microbes on PEG 600. We discovered that the modified Gompertz model via nonlinear regression utilizing the least square method was the best model to describe the growth curve. However, the use of statistical tests to choose the best model relies heavily on the residuals of the curve to be statistically robust. Normality tests for the residuals used in this work has indicated that the use of the modified Gompertz model in fitting of the growth curve of the sludge microbes on PEG 600 initially was not adequate due to the presence of an outlier. Upon removal of this outlier, the residuals conformed to normality test, visually and statistically
Neuroprotective Mechanisms of Orientin against Hydrogen Peroxide-induced Oxidative Damage in SH-SY5Y Cells
Authors: Lim Kit Ying , Sasmita Andrew Octavian , Ling Anna Pick Kiong , Koh Rhun Yian , Voon Kenny Gah Leong , Say Yee How , Wong Ying Pei 
Published: April 2022

Natural products or plant derivatives could be used to prevent or treat neurodegenerative diseases (ND). Oxidative stress has been highly implicated in the progression of ND;thus, this leads to the study on the effects of orientin in regulating Nrf2/Keap-1 redox signalling, PI3K/Akt survival and MAPK/ERK apoptosis pathways in the hydrogen peroxide (H2O2)-induced oxidative damage in SH-SY5Y cells. The cells were treated with half maximum non-toxic dose (Â½ MNTD) or maximum non-toxic dose (MNTD) of orientin and subsequently with H2O2. Cells were then subjected to the measurement of nitric oxide (NO), intracellular calcium (Ca2+), mitochondrial membrane potential (MMP) and annexin V/propidium iodide apoptosis assays. Regulation of the signalling pathways was analysed by Western blotting. Results showed that Â½ MNTD of orientin reduced the NO levels. The intracellular Ca2+ level was also reduced by Â½ MNTD and MNTD of orientin. The orientin treatment at Â½ MNTD and MNTD restored the loss of MMP. Pre-treatment of orientin reduced the early and late apoptotic cells as well as necrotic cells. Orientin was found to up-regulate the Nrf2/Keap-1 and PI3K/Akt pathways whilst down-regulate the MAPK/ERK pathway. The findings from this study will be useful for the prevention of ND in the near future.
Purification, Characterization and Sequencing of Alginate Lyase from Martelella sp. strain MAK4
Authors: Ali Abdallah Abdelkawy A. , Ebraheem Atef Mohammed , Mohammed A. Baayoume Abeer 
Published: April 2022

Bacterial isolate MAK4 was isolated from brown algae collected from the coastal area of the Red sea, Hurghada, Egypt and confirmed for alginate lyase production by halo formation around the colonies after flooding with cetylpyridinium chloride or Gramâ€™s iodine. Isolate MAK4 was identified according to morphological, biochemical and phylogenetic identification through 16s rRNA. The bacterial isolate was tentatively identified as Martelella sp. strain MAK4. It is aerobic, mesophilic, Gramâ€“ve, non-spore forming nonmotile, rod-shaped organism and produces catalase and oxidase. PCR was performed for alginate lyase gene using two pairs of degenerate primers. The alginate lyase enzyme was isolated and purified from the culture medium by ammonium sulfate precipitation, Sephadex G-100 and DEAE-Cellulose chromatography. The isolated enzyme has a specific activity of 62.9 u/mg, 6.15 purification folds and has a molecular weight of 35 kDa. The alginate lyase enzyme showed highest activity at 37 Â°C and at pH 7. The enzyme was stable over the pH range 6 to 9 and retained 80% of its activity after incubation at 40 Â°C for 90 min. The enzyme was active in the absence of metal ions, but the activity was enhanced by the addition of NaCl, KCl and Ca2+. The activity was lost with the addition of EDTA. The enzyme activity was strongly decreased in the presence of Cu2+, Zn2+, Co2+, Hg2+ and Mn2+. This novel bifunctional alginate lyase has the potential to be used in the eradication of resistant bacterial biofilm in clinical samples and production of alginate oligosaccharides in industry.
Mechanical Lateral Distal Femoral Angle (MLDFA), Medial Proximal Tibia Angle (MPTA), and Mechanical Axis Deviation (MAD) Value in Young Adults in North Sumatera
Authors: Winanto Iman Dwi , Ismiarto Yoyos Dias 
Published: April 2022

<p>Introduction. Reference value to determine the angle of lower extremity is only based on clinical measurement and radiological assessment, which is limited to tibiofemoral angle (TFA). Although this examination can estimate the lower extremity angle, it is not satisfactory for a comprehensive analysis. Material and Method. A descriptive study in RSUP Haji Adam Malik Hospital in August - September 2019 to measure mechanical lateral distal femoral angle (MLDFA), medial proximal tibia angle (MPTA), and mechanical axis deviation (MAD). Results. Thirty nine subjects were included in this study. The mean age was 26.77±4,65 years old (range: 22 to 39 years); 69,2% were male (n = 27) and 30,8% were female (n = 12). The average mechanical lateral distal femoral angle (MLDFA) was 87,93o ±2,16o . The average medial proximal tibia angle (MPTA) was 86,28o ±2,26o . The average mechanical axis deviation (MAD) was 1.56±1,48 mm. Our results of MLDFA and MPTA measurement, but not in MAD, are consistent with study conducted by Farr, et al. Conclusion. Our MLDFA, MPTA, but not MAD measurement results are similar to studies involving Caucasian population.</p><p>Pendahuluan. Nilai acuan sudut pada ekstremitas bawah hanya berdasarkan pemeriksaan klinis dan radiologis, yang terbatas pada sudut tibiofemoral. Pemeriksaan sudut tibiofemoral (STF) tunggal tidak cukup untuk analisis komprehensif ekstremitas bawah. Bahan dan Cara. Penelitian deskriptif di RSUP Haji Adam Malik pada bulan Agustus – September 2019 untuk mengukur sudut mekanik lateral distal femur (SMLDF), sudut medial proksimal tibia (SMPT), dan deviasi aksis mekanik (DAM). Hasil. Sejumlah 39 subjek diteliti. Usia rata-rata 26,77 ± 4,65 tahun (22 - 39 tahun); 69,2% pria (n = 27) dan 30,8% wanita (n = 12). Nilai rata-rata sudut mekanik lateral distal femur (SMLDF) adalah 87,93º ± 2,16º. Nilai rata-rata sudut medial proksimal tibia (SMPT) adalah 86,28º ± 2,26º. Nilai rata–rata deviasi aksis mekanik (DAM) adalah 1.56 ± 1,48 mm. Pada penelitian ini, hasil pengukuran SMLDF dan SMPT sesuai hasil penelitian Farr, et al, tetapi hasil pengukuran DAM tidak sesuai. Simpulan. Nilai SMLDF dan SMPT pada penelitian ini tidak berbeda dengan penelitian pada populasi Kaukasia</p><p> </p>
The Renovationist Movement in Contemporary Russian Islam
Authors: Bekkin Renat 
Published: April 2022

In recent years the Russian Islamic Internet has hosted broad discussion of publications and public speeches by religious figures calling themselves renovationists or modernists. The group’s representatives advocate revising the Sunnah and considering Islamic guidance not directly mentioned in the Qur’an optional. This is why they are referred to as ‘Qur’anites’ by their opponents. This paper analyses the renovationist phenomenon in modern Russian Islam. A specific feature of the movement is that its representatives’ ideology combines secularism regarding the provisions of Islam with clericalism regarding government and public institutions. The author questions whether Russian Islamic renovationists should be viewed as a single organisation. The renovationist movement’s potential may over time attract the attention of the political regime in modern Russia. The government uses the concept of ‘traditional Islam’ to detach loyal Muslims from those it sees as a threat. Once this construction is finally rejected, the renovationists’ religious and political views may serve as a foundation for a new ideology for Islam in Russia.
James Bond (1900–1989)—U.S. ornithologist—and his network of contributors to the avifauna of the West Indies
Authors: Gerhard Aubrecht  
Published: April 2022

Abstract James Bond, the well-known author of the field guide Birds of the West Indies, published numerous scientific papers on Caribbean avifauna that are based on decades of field research and involved numerous regional contributors. I analyzed a comprehensive database of Bond’s West Indian bird records to highlight 75 of Bond’s most prominent contributing observers from the different islands and countries. Short biographies illustrate the dense network of contributors Bond relied on during his studies of the regional avifauna and demonstrate his cooperative approach to research.

Keywords biographies, James Bond, network of contributors, ornithology, West Indies

Resumen James Bond (1900–1989)—ornitólogo estadounidense—y su red de colaboradores a la avifauna del Caribe insular • James Bond, el conocido autor de la guía de campo Birds of the West Indies, publicó numerosos artículos científicos sobre la avifauna del Caribe, que se basan en décadas de investigación de campo y en los que participaron numerosos colaboradores regionales. Analicé una amplia base de datos de los registros de aves del Caribe insular registrados por Bond a para destacar a 75 de los observadores con mayor contribución de las diferentes islas y países. Unas biografías breves de cada uno ilustran la densa red de colaboradores en los que Bond confió durante sus estudios de la avifauna regional a y demuestran su enfoque cooperativo para la investigación.

Palabras clave biografías, Caribe Insular, James Bond, ornitología, red de colaboradores

Résumé James Bond (1900–1989) – Un ornithologue américain et son réseau de contributeurs à l’avifaune des Antilles • James Bond, le célèbre auteur du guide de terrain intitulé Birds of the West Indies, a publié de nombreux articles scientifiques sur l’avifaune caribéenne basés sur des décennies de recherches sur le terrain et associant de nombreux contributeurs régionaux. J’ai analysé une base de données complète des observations d’oiseaux antillais de Bond pour mettre en valeur 75 des observateurs contributeurs les plus éminents des différentes îles et pays. De courtes biographies illustrent le réseau dense de contributeurs sur lequel Bond s’est appuyé pour étudier l’avifaune régionale et démontrent son approche coopérative de la recherche.

Mots clés
Antilles, biographies, James Bond, ornithologie, réseau de contributeurs
De woningcrisis in Nederland vanuit een bestuurlijk perspectief: achtergronden en oplossingen
Authors: Boelhouwer Peter , van der Heijden Harry 
Published: April 2022

The housing crisis in the Netherlands from an administrative perspective; backgrounds and solutions
Partly as a result of major problems on the housing market and in particular the large housing shortage, there is now a lot of attention for housing in both the press and politics. After many years of focus on more market forces and decentralization, the national government recently seems prepared to take more responsibility. In this contribution we try to interpret this turnaround by successively considering the main problems in the housing market, the development of government policy and possible solutions to the problems that have arisen. The emphasis is on the role of the national government. We conclude that, in view of the many spatial claims and the major investment tasks, it is important that the national government takes control and makes clear choices, which can then be worked out at regional and local level. By subsequently closely monitoring the developments and intervening if necessary, the central government can make adjustments on the intended housing policies.
Bestuurlijke geloofwaardigheid in het primair onderwijs
Authors: Honingh Marlies , Nolen Martijn , van der Sluis Margriet 
Published: April 2022

The credibility of school boards in primary education
Both in a legal and in a practical sense, the tasks of executives in school boards are difficult to delineate. Consequently, credibility of boards and their members has become topical. What makes an executive board credible? How do executives become and remain credible? In this article we address these questions and present the results of our qualitative analysis of the way in which executives in primary education give meaning and substance to their efforts. Based on the empirical results, it appears that executives of the board are well aware of the need to be perceived credible. It also appears that they take this into account in their daily behavior and interactions.
De drie deconcentraties in het sociaal domein
Authors: Nijdam Nils 
Published: April 2022

The three deconcentrations in the social domain: Improve relations between national government and municipalities
In 2015, the three decentralizations in the social domain took place, a transfer of tasks and resources from the national government to municipalities in the Netherlands. Since then, the Dutch municipalities have been responsible for tasks related to work, care and youth. How the municipalities have tackled these tasks? What is the situation in the social domain seven years later? And what is the relationship between municipalities and national government?It appears that municipalities are struggling with their new tasks, mainly because of the insufficient financial resources and the limited freedom of choice. With regard to the characterization of the transfer of tasks, it is better to speak of the three deconcentrations, instead of the three decentralizations. Municipalities have received new tasks, but experience little policy freedom to tackle those tasks. In order to achieve the goals associated with the transfer to municipalities, it is necessary to increase the scope for municipalities to make their own choices. In this way, national government and municipalities can work on more equal relations.
The Use of Y3Al5O12:Ce3+ and CaTiO3:Pr3+ in a Dual-layer Remote Phosphor Configuration Improves the Optical Efficiencies of a Phosphor-in-Glass White Light-Emitting Diode
Authors: Thong Nguyen Doan Minh , Son Dang Nguyen Hai , Ho Sang Dang , Quoc Anh Nguyen Doan , Lee Hsiao-Yi 
Published: April 2022

Although distant phosphor structure is not the best choice for color fidelity of white-light-emitting diode (W-LED) sources, it benefits the luminous flux of LED more than conformal or in-cup phosphor models. After recognizing the potential of remote phosphor structures, numerous studies have been done to overcome their drawbacks of light chromaticity. In this study, a phosphor package with two phosphor films is suggested for the W-LED. The two-layer remote phosphor structure is recognized to offer a great probability of heightened chromatic rendering parameters, including the color rending index CRI and the color quality scale CQS. The color temperature of the W-LEDs employed in this investigation is 8500 K. Placing a layer of green Y3Al5O12:Ce3+ or red CaTiO3:Pr3+ phosphor on top of the yellow phosphor YAG:Ce3+ layer will create the desired two-layered phosphor structure's form. The added phosphor CaTiO3:Pr3+ concentration will then be adjusted to achieve the best color quality. The existence of CaTiO3:Pr3+ increased CRI and CQS, implying that it has a significant impact on these two features. The concentration of CaTiO3:Pr3+ parallel with the CRI and CQS as the red spectral component is promoted within the W-LED. In the meantime, the green phosphor Y3Al5O12:Ce3+ advances the luminous flux. However, if the red CaTiO3:Pr3+ and green Y3Al5O12:Ce3+ phosphor concentrations are above the respective levels, it will diminish the luminous flux and color quality. According to Mie-scattering theory and Lambert- Beer's law to describe the outcome of this research. The conclusions of this study are crucial guidelines for producing better white light quality in W-LEDs.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited.
Liquid Level Detection via Node-Red and Automatic Image Processing System
Authors: Le Tai Huu , Ngo Phu Thai , Tran Van Ngu , Tran Viet Hung 
Published: April 2022

Internet of things (IoT) is increasingly useful in connecting network of devices on the internet. A popular need of IoT in the industry is to measure the level of the liquid in a faraway tank of interest. The traditional measurement method uses float, pressure or ultrasonic sensor and provides reliable results. Nonetheless, the disadvantages of traditional methods are that their range of measurement is rather short and their maintenance on the field is also difficult. To solve these problems, we propose a novel method that combines the image processing algorithm with Node-Red IoT systems. The original idea of this paper is to use the image of the ruler on the tank for measuring the physical height of liquid level in standard units. Our experimental results on real-time collected images via IoT live-streaming show that our proposed method is very fast and robust with different size and shape of different rulers. Our method is also accurate enough to facilitate the application of liquid level measurement in practice.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium provided the original work is properly cited.
Manajemen Plaza Ikan Tuban dalam Upaya Mendorong Pedagang Ikan untuk Meningkatkan Omset Penjualan
Authors: Suprapti Yuyun 
Published: April 2022

Penelitian ini untuk mengetahui bagaimana Manajemen Plaza Ikan mendorong pedagang ikan untuk meningkatkan omset penjualan. Penyediaan fasilitas-fasilitas yang memadahi dan diperlukan pedagang merupakan faktor yang mendorong dalam upaya peningkatan omset penjualan. Fasilitas yang disediakan antara lain fasilitas freezer, kulkas, promosi yang efektif ditempat sasaran, meningkatkan kualitas produk untuk meningkatkan harga jual, memberikan pinjaman modal. Metode yang digunakan adalah deskriptif kualitatif dengan pengambilan data menggunakan kuisioner. Analisa data menggunakan likert yaitu metode kualitatif yang diubah menjadi angka. Dari hasil pertanyaan kuisioner tentang bagaimana manajemen plaza ikan mendorong pedagang ikan untuk meningkatkan omset penjualan. fasilitas freezer, kulkas, promosi yang efektif ditempat sasaran, meningkatkan kualitas produk untuk meningkatkan harga jual, memberikan pinjaman modal, rata-rata responden menjawab setuju, sehingga ada kerjasama antara pihak manajemen dan pedagang ikan.