This study measured the levels of total mercury (tHg) in the whole tissues of cockles (Anadara granosa and A. antiquata) harvested from three estuaries of Western Lombok Island (WLI), Indonesia. This paper also evaluated the hazard level posed by the mercury in relation to the maximum residual limit for human consumption and to estimate the weekly intake and compare it with the provisional tolerable weekly intake (PTWI). The tHg concentrations in A. granosa ranged from 0.020 to 0.070 mg kg(-1), and those in A. antiquata were between 0.032 and 0.077 mg kg(-1) at all locations. All samples of cockles harvested from WLI contain tHg below the permissible limit for human consumption. The maximum weekly intakes for total mercury by coastal people range from 0.28 to 1.08 µg kg(-1) b.w., and they are below the recommended values of PTWI (5.6 µg kg(-1) b.w.). If it is assumed that 100% of the Hg in cockles is methyl mercury (MeHg), consumption of the indicated amounts at the measured values wouldn't exceed the MeHg PTWI (1.6 µg kg(-1) b.w.).
Pengembangan potensi desa menjadi desa ekowisata merupakan bentuk upaya dari masyarakat dan pemerintah dalam meningkatkan perekonomian lokal. Desa Lenek Ramban Biak merupakan salah satu desa di Kabupaten Lombok Timur yang memiliki potensi sebagai desa ekowisata. Pengembangan potensi wisata alam, wisata budaya dan wisata religi bertujuan untuk menarik minat wisatawan. Sosialisasi pengembangan ekosiwata dan kewirausahaan branding product lokal perlu dilakukan untuk meningkatkan pengetahuan dan keterlibatan masyarakat dalam pengelolaan desa ekowisata kedepannya. Pengabdian ini bertujuan untuk mengetahui bagaimana peningkatan pengetahuan dan kesadaran masyarakat Desa Lenek Ramban Biak terkait ekosiwata, serta peningkatan pengetahuan terkait kewirausahaan pada branding product lokal setelah dilakukan kegiatan sosialisasi. Metode yang dilakukan adalah metode ceramah, presentasi menggunakan Power Point (PPT) dan diskusi tanya jawab dengan peserta sosialiasi. Pelaksanaan kegiatan terdiri dari 4 tahapan, yaitu: 1) tahap persiapan; 2) tahap diseminasi acara sosialisasi; 3) tahap pelaksanaan; dan 4) tahap evaluasi. Sosialisasi kegiatan dilakukan dengan penjabaran materi ekosiwata dan kewirausahaan branding product lokal oleh narasumber. Diskusi dan tanya jawab terkait potensi ekowisata dan keterlibatan masyarakat dalam pengelolaan wisata. Memetakan potensi wisata alam, wisata religi, wisata budaya dan wisata kuliner. Pendataan produk lokal yang perlu dibranding seperti batu-bata dan makanan tradisional. Diskusi terkait tata cara branding product dan studi dari contoh produk ternama. Evaluasi kegiatan sosialiasi berdasarkan hasil kuesioner yang disebarkan sebelum dan sesudah dilaksanakan sosialisasi. Hasil evaluasi menunjukkan 13,5% peningkatan pengetahuan dan kesadaran terkait ekowisata dan 17% untuk branding product. Pengetahuan dan kesadaran masyarakat terkait ekowisata meningkat sebanyak 13.5% dan pengetahuan terkait branding product lokal meningkat sebanyak 17%.
Environmental problems, especially waste problems have become a hot issue. This could be due to the lack of information and learning about the importance of waste management. The more of community residents who live in the circle campus, the more types of waste that will be generated in the surrounding environment. One solution and strategy to reduce waste in the around campus is to manage inorganic waste properly by applying the concept of green lifestyle. The workshop for community consists of three stages, the preparation stage by conducting a site survey making a permit for facilities and infrastructure during the activity, the second stage by holding a workshop with the aim of socializing the inorganic waste management program into a microgreen planting media container that has beneficial and economic value, the last stage is the direct demonstration related to managing inorganic waste into product that have useful and economic value, namely as a container for microgreen planting media. The method used for the workshop activities is Direct Instruction which is carried out to provide an explanation regarding the importance waste management in maintaining the environment. Focus Group Discussion (FGD) which is carried out directly with processing of inorganic waste management. The output of this activity is expected to increase public awareness of environmental problems that have occurred recently, and increase the community who implement a green lifestyle.
Pototano Harbor is one of the locations that crosses a potential marine conservation area, namely the Gili Balu Marine Tourism Park Area.The use of the Pototano port location as a port location has long existed before the formation of the waters area of the Gili Balu water tourism park. This area consists of eight groups of islands which are characterized by beautiful beaches, hills, mangrove forest areas and also the beauty of underwater ecosystems. Natural conditions that support abundant biodiversity make this area have several ecosystems in the aquatic environment, including coral reefs, sea grasses and mangroves. This study aims to determine the condition of the biodiversity of the surrounding watersPototano Port and Core ZoneGili Balu Tourism Park Areanamely Gili Belang, Gili Paserang and Gili Namuby increasing knowledge and human resources regarding water area management. This area has both positive and negative values.The results showed that the highest level of diversity in coral reef ecosystems and seagrass ecosystems was found in the Core Zone of TWP Gili Balu, namely Gili Belang with 86% and 80.8% coverage.The diversity of mangrove species in the four locations is relatively the same, but the abundance or individual density of each species is relatively different.Conditionwaters in the research location classifieddry waters and under normal conditions or not pollutedbecause it has an abundance of plankton communitiesas big 62,33 Eng/L with the most common type is Thalassionema frauenfeldii and Chaetoceros tortissimus.
The specific purpose of this study was to determine the stability of S. sesban insecticide during storage before application and its stability in water during application. The dry powder of S. sesban leaves was extracted using water as the single solvent. Bioassay of S. sesban leaf extract was carried out on cabbage caterpillars (Plutella xylostella larvae) and Diadegma semiclausum imago on cabbage plants using a variation of storage time design. Mortality data of P. xylostella larvae and D. semiclausum imago were respectively processed by probit analysis to determine LC50. The results showed that the insect repellent content of S. sesban leaves was a compound from the saponin group and was unstable during simplicia storage, extract storage and also unstable in water before and during application. Storage of S. sesban leaf simplicia from 1 to 3 months only slightly reduced the lethal toxicity of the extract to P. xylostella larvae (mortality from 95 to 80% or LC50 from 28.82 to 28.83 ppm), but after 6 to 12 months storage, the lethal toxicity decreased drastically (mortality was 12.5 to 1.25% and LC50 was 247.99 ppm until calculated). Storage of S. sesban leaf extract from 7 to 15 days had resulted in a sharp decrease in lethal toxicity to P. xylostella larvae (mortality 70 to 40% and LC50 34.05 to 59.43 ppm) and 30 days storage causes the insect repellent to be inactive. (mortality was only 1.25% and LC50 was unaccounted for). Exposure to a solution of S. sesban leaf extract for 24 to 48 hours caused a decrease in lethal toxicity to P. xylostella larvae (mortality 32 to 28% and LC50 62.63 to 64.85 ppm) and after the solution was stored for 72 hours, the insect repellent was almost no active again (mortality was only 1.25 and LC50 was unstoppable). All storage treatments of insect repellent from S. sesban leaves showed no significant difference in the effect of lethal toxicity on D. semiclausum imago. In all the results of the bioassays, the mortality of D. semiclasum was 0 to 1.25% and each of all LC50(s) was unaccounted for
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