Redemption of Africa: The Vital Impulse of Black American Overseas Missionaries

In my current studies of Afro-Americans who became Christian missionaries in geographical regions beyond the borders of North America, I have discovered that the vast majority of them served on the African continent. The discovery has posed the question of how to account for the fact that Afro-American Christians, through their various denominational agencies of mission, have focused almost entirely upon the African continent as the field of their overseas missionary operation. In searching for the answer to this question, I have found that two powerful convictions have motivated black American Christians toparticipate in the Christian mission. The two compelling convictions have been held by black Christians who belonged to independent black denominations as well as religious bodies under white control

Daniel Coker: 19th Century Black Church Organizer, Educator and Missionary

Daniel Coker has been labeled as a “pioneer educator and churchorganizer.”1 Behind this label is the story of a restless adventurer, who possessed the priceless virtues of ability to see the needs of his enslaved and oppressed fellowmen and sufficient courage to do something about them. He belonged to that great company of personalities who have devoted their lives to the cause of freedom, equality and justice for Africans in America as well as on the Continent of Africa. Yet Daniel Coker is less well known than some of his contemporaries with whom he labored in the struggle for black liberation and human dignity. Historians have given less attention to his career than they have to some other freedom fighters who lived during his time and subsequent periods. The main reason for this neglect is not hard to seek, for Daniel Coker spent the greater portion of his public career in West Africa. Hence complete records of his adventurers have not been available to American writers. Consequently, the story of his pioneering endeavors is limited largely to the American scene of his activities. The purpose of this paper is to give a more complete account of his life and labors at home and abroad, and at the same time highlight some of his significant achievements

Henry McNeal Turner: A Fearless Prophet of Black Liberation

Since the beginning of the nineteen sixties the public career of Bishop Henry McNeal Turner (1834-1915) has gained spotlight as a subject for research scholars. This writer has received wide correspondence from scholars of various levels expressing the desire to undertake re¬ search projects on some aspects of Bishop Turner’s life and works, making inquiries about the existence of primary sources. Some of these research projects were to be term papers to meet course requirements; some master’s theses; some doctoral dissertations; and others for articles or books to be published

Book Reviews

Book Review

Type of Mineral Deposits on Alteration Rocks using Petrography, X-Ray Fluorescence (XRF), and X-Ray Diffraction (XRD) Method in Geothermal Prospect in Tiouw Village, Maluku

Indonesia is a country with abundant geothermal energy potential. One of the locations that have potential geothermal energy sources is Tiouw Village, Saparua, Central Maluku. This study was conducted on the types of mineral deposits using the petrographic method, X-Ray Diffraction (XRD), and X-Ray Fluorescence (XRF). Based on the results of petrographic analysis and XRD, rock samples 1, 2, and 3 of Tiouw include andesite igneous rocks with propylitic alteration type. While sample 4 is dacite igneous rock with argillic alteration type. Each rock sample has a mineral set of kaolinite, chlorite, quartz, cristobalite, epidote, and plagioclase. The XRF results showed the highest chemical composition of SiO2, followed by Al2O3 and K2O. This mineral content can indicate the subsurface temperature of the geothermal field in the range of 200–300 ºC with varying salinity, pH close to neutral, and low permeability. This interpreted that the type of mineral deposits in Tiouw Village was high sulfidation epithermal deposits. DOI: http://dx.doi.org/10.17977/um024v4i22019p03

KARAKTERISTIK MARSHALL ASPHALT CONCRETE-BINDER COURSE DENGAN BAHAN PENGISI BATU KARANG TAENO

Abstract   The coral rocks on Mount Taeno, Waringin Cap Village, Ambon, have the potential to be used as a filler for asphalt mixtures. In this research, an analysis of the use of filler material, which comes from Mount Taeno coral rocks, was carried out on the Marshall characteristics of asphalt mixtures, with a type of Asphalt Concrete-Binder Course. Asphalt mixtures are made with different asphalt contents, namely 5.0%; 5.5%; and 6.0%, and the filler content given to each mixture is 0%, 1%, 2%, and 3%. Evaluation was carried out on these mixtures using the 2018 General Specifications of the Bina Marga. This research shows that the asphalt content of the mixture influences the value of the optimum filler content added to the mixture. The higher the mixed asphalt content, the higher the optimum filler content that can be added. The optimum filler content for mixtures with asphalt content of 5.0%, 5.5%, and 6.0% is 1.30%, 1.58%, and 1.79%, respectively. The asphalt content in the Asphalt Concrete-Binder Course observed in this study was limited to only 5.0%, 5.5%, and 6.0%. Therefore, further studies are recommended to be carried out, on mixtures with asphalt content higher than 6.0%, with variations in filler content greater than 3.0%. Keywords: asphalt mixture; Marshall characteristics; filler; optimum filler content     Abstrak   Batu karang di Gunung Taeno, Dusun Waringin Cap, Ambon, berpotensi untuk dijadikan sebagai bahan pengisi campuran beraspal. Pada penelitian dilakukan analisis penggunaan bahan pengisi, yang berasal dari batu karang Gunung Taeno, terhadap karakteristik Marshall campuran beraspal, jenis Asphalt Concrete-Binder Course. Campuran beraspal dibuat dengan kadar aspal yang berbeda-beda, yaitu 5,0%; 5,5%; dan 6,0%, dan kadar bahan pengisi yang diberikan kepada masing-masin campuran tersebut adalah 0%, 1%, 2%, dan 3%. Evaluasi dilakukan terhadap campuran-campuran tersebut dengan menggunakan Spesifikasi Umum Bina Marga 2018. Penelitian ini menunjukkan bahwa kadar aspal campuran berpengaruh terhadap nilai kadar bahan pengisi optimum yang ditambahkan pada campuran. Semakin tinggi nilai kadar aspal campuran, semakin tinggi pula kadar bahan pengisi optimum yang dapat ditambahkan. Kadar bahan pengisi optimum untuk campuran dengan kadar aspal 5,0%, 5,5%, dan 6,0%, berturut-turut adalah 1,30%, 1,58%, dan 1,79%. Kadar aspal pada Asphalt Concrete-Binder Course yang diamati pada studi ini terbatas hanya 5,0%, 5,5%, dan 6,0%. Karena itu, kajian lebih lanjut disarankan untuk dilakukan, pada campuran dengan kadar aspal yang lebih tinggi daripada 6,0%, dengan variasi kadar bahan pengisi yang lebih besar daripada 3,0%.   Kata-kata kunci: campuran beraspal; karakteristik Marshall; bahan pengisi; kadar bahan pengisi optimu

KARAKTERISTIK MARSHALL ASPHALT CONCRETE-BINDER COURSE DENGAN BAHAN PENGISI BATU KARANG TAENO

Abstract   The coral rocks on Mount Taeno, Waringin Cap Village, Ambon, have the potential to be used as a filler for asphalt mixtures. In this research, an analysis of the use of filler material, which comes from Mount Taeno coral rocks, was carried out on the Marshall characteristics of asphalt mixtures, with a type of Asphalt Concrete-Binder Course. Asphalt mixtures are made with different asphalt contents, namely 5.0%; 5.5%; and 6.0%, and the filler content given to each mixture is 0%, 1%, 2%, and 3%. Evaluation was carried out on these mixtures using the 2018 General Specifications of the Bina Marga. This research shows that the asphalt content of the mixture influences the value of the optimum filler content added to the mixture. The higher the mixed asphalt content, the higher the optimum filler content that can be added. The optimum filler content for mixtures with asphalt content of 5.0%, 5.5%, and 6.0% is 1.30%, 1.58%, and 1.79%, respectively. The asphalt content in the Asphalt Concrete-Binder Course observed in this study was limited to only 5.0%, 5.5%, and 6.0%. Therefore, further studies are recommended to be carried out, on mixtures with asphalt content higher than 6.0%, with variations in filler content greater than 3.0%. Keywords: asphalt mixture; Marshall characteristics; filler; optimum filler content     Abstrak   Batu karang di Gunung Taeno, Dusun Waringin Cap, Ambon, berpotensi untuk dijadikan sebagai bahan pengisi campuran beraspal. Pada penelitian dilakukan analisis penggunaan bahan pengisi, yang berasal dari batu karang Gunung Taeno, terhadap karakteristik Marshall campuran beraspal, jenis Asphalt Concrete-Binder Course. Campuran beraspal dibuat dengan kadar aspal yang berbeda-beda, yaitu 5,0%; 5,5%; dan 6,0%, dan kadar bahan pengisi yang diberikan kepada masing-masin campuran tersebut adalah 0%, 1%, 2%, dan 3%. Evaluasi dilakukan terhadap campuran-campuran tersebut dengan menggunakan Spesifikasi Umum Bina Marga 2018. Penelitian ini menunjukkan bahwa kadar aspal campuran berpengaruh terhadap nilai kadar bahan pengisi optimum yang ditambahkan pada campuran. Semakin tinggi nilai kadar aspal campuran, semakin tinggi pula kadar bahan pengisi optimum yang dapat ditambahkan. Kadar bahan pengisi optimum untuk campuran dengan kadar aspal 5,0%, 5,5%, dan 6,0%, berturut-turut adalah 1,30%, 1,58%, dan 1,79%. Kadar aspal pada Asphalt Concrete-Binder Course yang diamati pada studi ini terbatas hanya 5,0%, 5,5%, dan 6,0%. Karena itu, kajian lebih lanjut disarankan untuk dilakukan, pada campuran dengan kadar aspal yang lebih tinggi daripada 6,0%, dengan variasi kadar bahan pengisi yang lebih besar daripada 3,0%.   Kata-kata kunci: campuran beraspal; karakteristik Marshall; bahan pengisi; kadar bahan pengisi optimu

Literature Review: Global Neonicotinoid Insecticide Occurrence in Aquatic Environments

Neonicotinoids have been the most commonly used insecticides since the early 1990s. Despite their efficacy in improving crop protection and management, these agrochemicals have gained recent attention for their negative impacts on non-target species such as honeybees and aquatic invertebrates. In recent years, neonicotinoids have been detected in rivers and streams across the world. Determining and predicting the exposure potential of neonicotinoids in surface water requires a thorough understanding of their fate and transport mechanisms. Therefore, our objective was to provide a comprehensive review of neonicotinoids with a focus on their fate and transport mechanisms to and within surface waters and their occurrence in waterways throughout the world. A better understanding of fate and transport mechanisms will enable researchers to accurately predict occurrence and persistence of insecticides entering surface waters and potential exposure to non-target organisms in agricultural intensive regions. This review has direct implications on how neonicotinoids are monitored and degraded in aquatic ecosystems. Further, an improved understanding of the fate and transport of neonicotinoids aide natural resource practitioners in the development and implementation of effective best management practices to reduce the potential impact and exposure of neonicotinoids in waterways and aquatic ecosystems