Judul: Heavy Metal Content of Pb and Cu in the Sandfish Holothuria scabra (Jaeger, 1833) in Tinjil Island Waters and Deli Island Waters, Banten
Abstrak: Potensi sumberdaya perikanan di Kabupaten Pandeglang terdiri dari ikan pelagis, ikan demersal, ikan karang, kerang-kerangan, cumi-cumi, udang dan teripang. Muatan batubara yang tumpah di bagian selatan perairan Pulau Tinjil dan Pulau Deli dapat menyebabkan terjadinya akumulasi logam berat pada sumberdaya perikanan. Penelitian ini bertujuan menganalisis akumulasi logam berat Pb dan Cu pada daging teripang pasir (Holothuria scabra) di perairan Pulau Tinjil dan Pulau Deli, Provinsi Banten. Pengambilan sampel dilaksanakan pada tanggal 6 sampai dengan 7 Juni 2020 di Pulau Tinjil dan 24 sampai dengan 25 Juni 2020 di Pulau Deli. Analisis logam berat Pb dan Cu menggunakan metode ICP OES. Kandungan logam Pb pada daging teripang pasir di perairan Pulau Tinjil berkisar 0,10 mg kg-1 hingga 0,16 mg kg-1 dan perairan Pulau Deli berkisar 0,01 mg kg-1 hingga 0,99 mg kg-1. Kandungan logam Cu pada daging teripang pasir di perairan Pulau Tinjil berkisar 1,22 mg kg-1 hingga 2,33 mg kg-1 dan di perairan Pulau Deli berkisar 2 mg kg-1 hingga 2,38 mg kg-1. Kandungan logam berat Pb dan Cu yang terdapat di dalam daging teripang pasir (Holothuria scabra) masih berada di bawah batas maksimum yang telah ditetapkan menurut baku mutu. Hal tersebut menunjukkan, bahwa teripang pasir di perairan Pulau Tinjil dan Pulau Deli dapat dikonsumsi dengan jumlah yang tidak berlebih. Kemudian, akumulasi Pb dan Cu pada teripang pasir di perairan Pulau Tinjil dan Pulau Deli termasuk ke dalam kategori rendah, karena hasil faktor biokonsentrasi teripang pada logam Pb dan Cu di kedua pulau kurang dari 100., Potential fishery resources in Pandeglang Regency consist of pelagic fish, demersal fish, reef fish, shellfish, squid, shrimp and sea cucumbers. Spilled coal loads in the southern part of the waters can cause accumulation of heavy metals in sandfish. This study aims to analyze the accumulation of heavy metals Pb and Cu in the meet of sandfish (Holothuria scabra) in the waters of Tinjil Island and Deli Island, Banten Province. Sampling was carried out on 6 to 7 June 2020 on Tinjil Island and 24 to 25 June 2020 on Deli Island. Analysis of heavy metals Pb and Cu using the ICP OES method. The content of Pb metal in sandfish meat in Tinjil Island waters ranged from 0.10 mg kg-1 to 0.16 mg kg-1 and in Deli Island waters it ranged from 0.01 mg kg-1 to 0.99 mg kg-1. Cu content in sandfish meat in Tinjil Island waters ranged from 1.22 mg kg-1 to 2.33 mg kg-1 and in Deli Island waters it ranged from 2 mg kg-1 to 2.38 mg kg-1. The content of heavy metals Pb and Cu in the meat of sandfish (Holothuria scabra) is still below the maximum limit set according to quality standard. This shows that sandfish in the waters of Tinjil Island and Deli Island can be consumed in moderation. Then, the accumulation of Pb and Cu in sandfish in the waters of Tinjil Island and Deli Island is included in the low category, because the results of the bioconcentration factor of sandfish on Pb and Cu metals on both islands are less than 100.
Keyword: Heavy metal, Deli Island, Tinjil Island, Sandfish

Judul: Heavy Metal Content (Hg, Cd, Pb, and Cu) in Mud Crab (Scylla serrata) in Banten Bay
Abstrak: Perkembangan industri dan pemukiman penduduk di sekitar perairan Teluk Banten dapat meningkatkan masukan limbah logam berat dan menyebabkan akumulasi pada biota perairan, khususnya pada kepiting bakau (Scylla serrata). Penelitian ini bertujuan menentukan tingkat akumulasi kandungan logam berat (Hg, Cd, Pb, dan Cu) yang terdapat pada daging kepiting bakau di perairan Bojonegara, Teluk Banten. Pengambilan sampel kepiting bakau dilakukan selama tiga bulan yaitu bulan Agustus hingga Oktober 2020 di perairan tersebut. Pengukuran kandungan logam berat dilakukan dengan menggunakan AAS (Atomic Absorption Spectrophotometer). Kandungan logam berat Hg, Cd, dan Pb pada daging kepiting bakau berada di bawah nilai sensitivitas AAS yang digunakan yaitu sebesar <0,001 mg kg-1, <0,005 mg kg-1, <0,030 mg kg-1, sedangkan untuk logam berat Cu berkisar antara 4,44 sampai 13,52 mg kg-1. Nilai tersebut masih berada di bawah baku mutu yang ditetapkan. Tingkat akumulasi kandungan logam berat kepiting bakau dalam air tergolong akumulasi tinggi. Ukuran sampel tidak berpengaruh secara signifikan terhadap logam berat yang terkandung pada daging kepiting bakau. Batas aman konsumsi daging kepiting bakau yang didapatkan dari perairan tersebut adalah 12,9348 kg daging/minggu (dewasa) dan 3,8831 kg daging/minggu (anak-anak)., The development of industry and residential areas around the waters of Banten Bay can increase the input of heavy metal waste and cause accumulation in aquatic biota, especially in mud crab (Scylla serrata). This study aims to determine the level of accumulation of heavy metals (Hg, Cd, Pb, and Cu) contained in mud crab meat in Bojonegara Coastal Waters, Banten Bay. Sampling of the mud crabs was carried out monthly for three months, from August to October 2020 in the waters. Analysis of heavy metal content was carried out using AAS (Atomic Absorption Spectrophotometer). According to the analysis, content of heavy metals Hg, Cd, and Pb in mud crab was under the AAS sensitivity value used, which was <0.001 mg kg-1, <0.005 mg kg-1, <0.030 mg kg- 1, respectively, while for heavy metal Cu ranged from 4.44 to 13.52 mg kg-1. Based on the results, this value was still below the quality standards. The accumulation level of heavy metal content of mud crab in water is classified as high accumulation. The sample size did not significantly affect the heavy metals contained in the mud crab meat. The safe limit for consumption of the mud crab meat taken in the waters was 12.9348 kg meat/week (adults) and 3.8831 kg meat/week (children).
Keyword: accumulation, Banten Bay, heavy metals, mud crab

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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