Judul: Semi Quantitative Risk Assessment Formalin untuk Produk Ikan Makarel Impor Beku di Jakarta.
Abstrak: Makarel merupakan komoditas perikanan Indonesia yang umumnya diimpor dari negara Jepang, China dan Netherland. Formalin merupakan bahan berbahaya dan penilaian risiko bahaya formalin pada produk perikanan impor belum pernah dilakukan. Risk Assesment merupakan suatu struktur ilmu berdasarkan proses untuk menduga kemungkinan dan keparahan risiko yang tidak pasti. Tujuan peelitian ini adalah memperkirakan keberadaan formalin pada ikan makarel impor beku menurut jenis dan asal negara dan mengevaluasi bahaya formalin dan menentukan tingkat bahaya formalin pada produk ikan makarel beku impor jenis frozen pacific mackerel dan frozen atlantic mackerel. Penelitian ini menggunakan metode semi quantitative risk assessment.Kadar formalin yang terkandung pada ikan makarel beku diuji menggunakan test kit formalin (merck) untuk mendapatkan hasil kualitatif dan uji spektrofotometri untuk mendapatkan hasil kuantitatif. Kadar formalin pada ikan makarel beku berdasarkan jenisnya yang diuji menggunakan metode spektrofotometri memiliki rata- rata 0,2383 ppm (frozen pacific mackerel) dan 0,4891 ppm (frozen atlantic mackerel), sedangkan kadar formalin pada ikan makarel beku berdasarkan asal negaranya memiliki ratarata 0,2383 ppm (Netherland), 0,4995 ppm (Jepang) dan 0,4829 ppm (China). Nilai perkiraan risiko yang dihasilkan dari pengisian risk ranger adalah 68, hal ini menandakan bahwa risiko bahaya yang ditimbulkan pada masyarakat Indonesia khususnya provinsi DKI Jakarta termasuk ke dalam kategori tinggi.
Keyword: risk assessment, Formalin, ikan makarel

Judul: Identification Of Differentiating Indicators Of Formaldehyde Origin Based On Parameters Of Quality Deterioration Value In Tuna, Mackerel and Yellowtail.
Abstrak: Keamanan pangan merupakan suatu hal yang perlu diperhatikan dalam membangun sektor perikanan. Penyalahgunaan formalin sebagai bahan pengawet ikan merupakan salah satu permasalahan yang kerap ditemukan di Indonesia. Akan tetapi, secara alami ikan dapat membentuk senyawa formaldehida melalui reaksi trimetilamin oksida (TMAO). Hal ini menyebabkan sulitnya membedakan ikan dengan dan tanpa penambahan formaldehida. Penelitian ini bertujuan mengindentifikasi indikator pembeda berdasarkan parameter laju kemunduran mutu (organoleptik, nilai pH, TVB, FA, dan DMA) pada ikan tongkol, ekor kuning dan kembung dengan penambahan dan tanpa penambahan formalin selama 8 minggu dalam penyimpanan beku. Indikasi ikan yang mengandung formalin selama masa penyimpanan yaitu tingginya kandungan formaldehida serta DMA seiring dengan lama penyimpanan. Parameter organoleptik pada penelitian ini belum dapat dijadikan sebagai parameter pembeda yang kuat, The development of the fishing industry must take food safety into account. Formalin misused is one of the problems that is often found in Indonesia. However, fish are naturally able to form formaldehyde compounds through the reaction of trimethylamine oxide (TMAO). As a result, it becomes challenging to distinguish between fish possessing endogenous formaldehyde content and fish containing formalin during storage. This study aims to identify differentiating indicators with and without the addition of formaldehyde in tuna, mackerel, and yellowtail based on quality rating rate parameters (organoleptic, pH value, TVB, formaldehyde, and DMA) for 8 weeks with frozen storage. Indications of fish containing formalin during storage are high levels of total formaldehyde and DMA. Organoleptic parameters in this study could not be used as strong differentiating parameters.
Keyword: formaldehida, ikan, indikator, suhu beku

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell