Land Suitability and Capability For Mariculture Utilization of Coastal Area of Manado Tua Island

The concept of land suitability and carrying capacity in utilizing the coastal land area of Manado Tua Island is a long-term goal in the study of sustainable coastal and small island management. Meanwhile, alternative livelihoods for sustainable aquaculture food sources are a special target. The potential of freshwater supply becomes a limiting factor for small islands, in addition to land availability. The special objective is the use of aquatic land as aquaculture land which has an impact on alternative livelihoods and the availability of food sources. The land suitability analysis is carried out in the following stages: (1) preparing a map of the Manado Tua Island area, (2) creating a matrix for the suitability of aquaculture activities, (3) providing weighting and scoring, and (4) conducting spatial analysis. The biogeophysical conditions of the coastal waters of Manado Tua Island are classified as normal for mariculture cultivation activities. Geographically the island is located at coordinates 01º 37 '57 "North Latitude and 124º 41" 56 "East Longitude. The very suitable location I was 44.03 m2, while the suitable land was 34.25 m2, and the conditionally suitable land was 17.13 m2. For location II, the area that fully meets the requirements is 70.50 m2, and those that meet the appropriate requirements are 49.86 m2, and those that meet the conditionally are 27.51 m2. The land area of Manado Tua Island is 1,056.02 ha. The condition of freshwater sources has not yet the potential to meet the needs of the community and visiting tourists.Keywords: land suitability, aquaculture, freshwater utilization, Manado Tua IslandAbstrakKonsep kesesuaian lahan dan daya dukung dalam memanfaatkan areal lahan pesisir  Pulau Manado Tua merupakan tujuan jangka panjang dalam studi pengelolaan pesisir dan pulau kecil secara berkelanjutan. Sedangkan alternatif mata pencaharian untuk sumber pangan hasil budidaya perairan secara berkelanjutan menjadi target khusus. Potensi sediaan air tawar menjadi faktor pembatas pulau kecil, disamping ketersediaan lahan. Adapun tujuan khusus adalah pemanfaatan lahan perairan sebagai lahan budidaya perikanan yang berdampak pada alternatif mata pencaharian serta ketersediaan sumber bahan pangan. Analisis kesesuian lahan dilakukan dalam tahapan: (1) penyusunan peta kawasan Pulau Manado Tua, (2) membuat matriks kesesuaian kegiatan budidaya perikanan, (3) memberikan pembobotan dan pengharkatan, dan (4) melakukan analisis spasial. Kondisi biogeofisik perairan pantai Pulau Manado Tua tergolong normal untuk kegiatan budidaya matrikultur. Secara geografi Pulau terletak pada koordinat 01º 37’ 57” LU dan 124º 41’ 56” BT. Pada lokasi I yang sangat sesuai seluas 44,03 m2, sedangkan lahan yang sesuai seluas 34,25 m2 dan lahan yang sesuai bersyarat seluas 17,13 m2.  Untuk lokasi II  areal yang sangat memenuhi syarat adalah seluas 70.50 m2, dan yang memenuhi syarat sesuai adalah seluas 49,86 m2, dan yang memenuhi sesuai bersyarat seluas 27,51 m2. Luas daratan Pulau Manado Tua 1.056,02 ha . Kondisi sumber air tawar di belum berpotensi untuk memenuhi kebutuhan masyarakat dan wisatawan yang berkunjung.Kata kunci: kesesuaian lahan, budidaya perikanan, pemanfaatan air tawar, Pulau Manado Tu

Biological Rhythms in the Skin

Circadian rhythms, ≈24 h oscillations in behavior and physiology, are reflected in all cells of the body and function to optimize cellular functions and meet environmental challenges associated with the solar day. This multi-oscillatory network is entrained by the master pacemaker located in the suprachiasmatic nucleus (SCN) of the hypothalamus, which directs an organism’s rhythmic expression of physiological functions and behavior via a hierarchical system. This system has been highly conserved throughout evolution and uses transcriptional–translational autoregulatory loops. This master clock, following environmental cues, regulates an organism’s sleep pattern, body temperature, cardiac activity and blood pressure, hormone secretion, oxygen consumption and metabolic rate. Mammalian peripheral clocks and clock gene expression have recently been discovered and are present in all nucleated cells in our body. Like other essential organ of the body, the skin also has cycles that are informed by this master regulator. In addition, skin cells have peripheral clocks that can function autonomously. First described in 2000 for skin, this review summarizes some important aspects of a rapidly growing body of research in circadian and ultradian (an oscillation that repeats multiple times during a 24 h period) cutaneous rhythms, including clock mechanisms, functional manifestations, and stimuli that entrain or disrupt normal cycling. Some specific relationships between disrupted clock signaling and consequences to skin health are discussed in more depth in the other invited articles in this IJMS issue on Sleep, Circadian Rhythm and Skin

On the thickness of the double layer in ionic liquids

In this study, we examined the thickness of the electrical double layer (EDL) in ionic liquids using density functional theory (DFT) calculations and molecular dynamics (MD) simulations. We focused on the BF4- anion adsorption from 1-ethyl-3-methylimidazolium tetrafluoroborate (EMImBF4) ionic liquid on the Au(111) surface. At both DFT and MD levels, we evaluated the capacitance-potential dependence for the Helmholtz model of the interface. Using MD simulations, we also explored a more realistic, multilayer EDL model accounting for the ion layering. Concurrent analysis of the DFT and MD results provides a ground for thinking whether the electrical double layer in ionic liquids is one- or multi-ionic-layer thick

Peptides, DNA and MIPs in gas sensing. From the realization of the sensors to sample analysis

Detection and monitoring of volatiles is a challenging and fascinating issue in environmental analysis, agriculture and food quality, process control in industry, as well as in ‘point of care’ diagnostics. Gas chromatographic approaches remain the reference method for the analysis of volatile organic compounds (VOCs); however, gas sensors (GSs), with their advantages of low cost and no or very little sample preparation, have become a reality. Gas sensors can be used singularly or in array format (e.g., e-noses); coupling data output with multivariate statical treatment allows un-target analysis of samples headspace. Within this frame, the use of new binding elements as recognition/interaction elements in gas sensing is a challenging hot-topic that allowed unexpected advancement. In this review, the latest development of gas sensors and gas sensor arrays, realized using peptides, molecularly imprinted polymers and DNA is reported. This work is focused on the description of the strategies used for the GSs development, the sensing elements function, the sensors array set-up, and the application in real cases

UBEM's archetypes improvement via data-driven occupant-related schedules randomly distributed and their impact assessment

In Urban Building Energy Models (UBEMs), buildings are usually modelled via archetypes describing occupants’ behaviour via fixed schedules. This research (i) creates data-driven schedules for electric use and occupancy from smart meter readings randomly distributed in the model to improve residential archetypes, (ii) assesses the impact of these schedules on UBEMs’ energy results at different temporal resolutions and spatial scales. The novel assessment procedure exploits integrated heat maps based on coefficients of variation of the root means square error (CVRMSE). The outcomes show that differences in energy needs, with randomized schedules, range based on temporal and spatial aggregation. Yearly, for the entire neighbourhood, heating and cooling energy needs, and electric uses are estimated -2%, +1%, and +18% compared to the base case. The outputs show that, when simulations are focused on the entire district, fixed schedules can be enough to describe energy patterns. However, if the simulation is focused on small groups of buildings (e.g., 5 or fewer), randomising the schedules can create variability in the model in terms of electric use and occupancy among buildings characterized by the same archetype. The followed methodology can be exploited also with larger databases and eventually verified with also other types of data

Carbon Absorption in Seagrasses in Tongkaina Coastal Waters, Bunaken District, Manado City, North Sulawesi

This study was conducted to determine the types of seagrasses and calculate biomass and calculate how much carbon absorption in seagrasses was found in the location of Tongkaina Beach, Bunaken District, Manado City, North Sulawesi. The sampling procedure in the field is the method of cruising surveys. A cruising survey is a sample collection method that is carried out by walking through the coastal area of all seagrasses found.  After the sampling at the site is completed, the sample in the inventory is then photographed. The samples that have been obtained are analyzed in the laboratory using the loss on ignition (LOI) method. The results of the study on Tongkaina coastal waters covering an area of 25,000 meters with a coastal length of ±500 meters, in an area parallel to the coastline as wide as ±50 meters towards the sea and six types of seagrasses were obtained, namely: Enhalus acoroides, Thalassia hemprichii, Syringodium isoetifolium, Cymodocea rotundata, Halodule uninervis, and Halodule pinifolia.  The biomass in seagrasses found had an average value of 78.10% with the highest individual seagrass biomass found in seagrass type Enhalus acoroides with a biomass value of 87.23grams of dry weight (gbk)/individual and the lowest type of seagrass individual biomass value was found in seagrass type seagrass with a biomass value of 66.67grams of dry weight (gbk)/individual.  The total carbon content calculated in the entire seagrass obtained was 46,0941gCKeywords: Tongkaina Beach; seagrasses; biomass; carbon absorptionAbstrakPenelitian ini dilakukan untuk mengetahui jenis-jenis lamun dan menghitung biomassa serta menghitung berapa serapan karbon pada lamun yang ditemukan dilokasi Perairan Pantai Tongkaina Kecamatan Bunaken Kota Manado Provinsi Sulawesi Utara. Prosedur pengambilan sampel di lapangan menggunakan metode survei jelajah. Survei jelajah adalah metode pengumpulan sampel yang di lakukan dengan cara menyusuri daerah pantai terhadap semua lamun yang ditemukan. Setelah pengambilan sampel di lokasi selesai, sampel di inventarisir kemudian difoto. Sampel yang telah diperoleh dianalisa di laboratorium dengan menggunakann metode loss on ignition (LOI). Hasil penelitian pada perairan pantai Tongkaina seluas 25.000 meter dengan panjang pantai ±500 meter sejajar garis pantai dan lebar ±50 meter ke arah laut.  Ditemukan enam jenis lamun yaitu: Enhalus acoroides, Thalassia hemprichii, Syringodium isoetifolium, Cymodocea rotundata, Halodule uninervis dan Halodule pinifolia. Biomassa pada lamun yang ditemukan memiliki nilai rata-rata 78,53% dengan biomassa individu lamun tertinggi terdapat pada lamun jenis Enhalus acoroides dengan nilai biomassa mencapai 87,23gram berat kering (gbk)/individu dan nilai biomassa individu jenis lamun terendah terdapat pada lamun jenis Syringodium isoetifolium dengan nilai biomassa 66,67gram berat kering (gbk)/individu. Untuk total kandungan karbon yang dihitung pada keseluruhan lamun yang didapat sebesar 46,0941gC.Kata kunci: Pantai Tongkaina; Lamun; biomasa, serapan carbo

Marine Debris Composition On Tasik Ria Beach, Tombariri, Minahasa Regency

Indonesia disebut sebagai kontributor sampah plastik ke laut terbesar kedua di dunia setelah Tiongkok, dengan estimasi 0,48-1,29 juta metrik ton per tahun (Jambeck et al, 2015). Masalah utama dewasa ini adalah kurangnya informasi mengenai pencemaran sampah laut di pantai, khususnya di Sulawesi Utara. Penelitian ini bertujuan untuk mengidentifikasi jenis sampah laut di Pantai Tasik Ria dengan menggunakan metode pengamatan garis transek. Pengamatan sampah laut dilakukan sebanyak 5 kali dengan total 10 transek antara bulan Februari hingga April 2019. Analisis data dilakukan dengan menggunakan perangkat lunak yaitu Microsoft Excel, Statgraphics, dan JMP. Adapun tehnik analisis yang digunakan adalah EDA (Exploratory Data Analysis) dengan pendekatan utama yaitu, GDA (Graphical Data Analysis). Dari berbagai semua jenis sampah yang didapatkan, sampah plastik merupakan yang paling banyak ditemukan yaitu sebanyak 189 item, diikuti kaca 97 item, kayu dan turunannya 11 item, karet 5 item dan terakhir pakaian 2 item. Berdasarkan hasil penelitian, jenis sampah makro merupakan ukuran sampah yang paling banyak ditemukan di lokasi penelitian. Jumlah total makro-debris yang dikumpulkan di sepuluh transek pengamatan adalah sebanyak 316 item dengan bobot total 118,62 gr/m2, sedangkan meso-debris hanya terdapat 6 item dengan bobot total 7,18 gr/m2. Persentase komposisi makro-debris yang terdapat di pantai Tasik Ria adalah plastik (58,15%), kaca (29,85%), logam (6,52%), kayu dan turunannya (3,42%), karet (1,55%) dan pakaian (0,62%). Hasil ini dapat menggambarkan potensi kejadian dimana plastik menjadi komponen sampah laut dominan di pantai, secara khusus di Kecamatan Tombariri, Kabupaten Minahasa

Marine Debris Composition on Tasik Ria Beach, Tombariri, Minahasa Regency

Indonesia is referred to as the second largest contributor of marine plastic waste in the world after China, with an estimated 0.48-1.29 million metric tons per year (Jambeck et al, 2015). The main problem today is the lack of information about pollution of marine debris on the coast, especially in North Sulawesi. This study aims to identify the type of marine debris on Tasik Ria Beach using the transect line observation method. Observation of marine debris was carried out 5 times with a total of 10 transects between February and April 2019. Data analysis was carried out using several software namely Microsoft Excel, Statgraphics, and JMP. The analysis technique used is EDA (Exploratory Data Analysis) with GDA (Graphical Data Analysis) as the main approach. Of the various types of debris obtained, plastic debris is the most commonly found, as many as 189 items, followed by glass 97 items, wood and derivatives of 11 items, rubber 5 items and clothes 2 items. Based on the results of the study, the type of macro debris is the most common category of debris at the study site. The total number of macro-debris collected in ten observation transects was 316 items with a total weight of 118.62 gr/m2, while meso-debris had only 6 items with a total weight of 7.18 gr/m2. The percentage of macro-debris composition found on Tasik Ria beach is plastic (58.15%), glass (29.85%), metal (6.52%), wood and derivatives (3.42%), rubber (1, 55%) and clothes (0.62%). These results can illustrate the potential for events where plastic is the dominant component of marine debris on the coast, specifically in the District of Tombariri, Minahasa Regency.Keywords: Marine debris, Macro-debris, Category, Composition, Tasik Ria ABSTRAKIndonesia disebut sebagai kontributor sampah plastik ke laut terbesar kedua di dunia setelah Tiongkok, dengan estimasi 0,48-1,29 juta metrik ton per tahun (Jambeck et al, 2015). Masalah utama dewasa ini adalah kurangnya informasi mengenai pencemaran sampah laut di pantai, khususnya di Sulawesi Utara. Penelitian ini bertujuan untuk mengidentifikasi jenis sampah laut di Pantai Tasik Ria dengan menggunakan metode pengamatan garis transek. Pengamatan sampah laut dilakukan sebanyak 5 kali dengan total 10 transek antara bulan Februari hingga April 2019. Analisis data dilakukan dengan menggunakan perangkat lunak yaitu Microsoft Excel, Statgraphics, dan JMP. Adapun tehnik analisis yang digunakan adalah EDA (Exploratory Data Analysis) dengan pendekatan utama yaitu, GDA (Graphical Data Analysis). Dari berbagai semua jenis sampah yang didapatkan, sampah plastik merupakan yang paling banyak ditemukan yaitu sebanyak 189 item, diikuti kaca 97 item, kayu dan turunannya 11 item, karet 5 item dan terakhir pakaian 2 item. Berdasarkan hasil penelitian, jenis sampah makro merupakan ukuran sampah yang paling banyak ditemukan di lokasi penelitian. Jumlah total makro-debris yang dikumpulkan di sepuluh transek pengamatan adalah sebanyak 316 item dengan bobot total 118,62 gr/m2, sedangkan meso-debris hanya terdapat 6 item dengan bobot total 7,18 gr/m2. Persentase komposisi makro-debris yang terdapat di pantai Tasik Ria adalah plastik (58,15%), kaca (29,85%), logam (6,52%), kayu dan turunannya (3,42%), karet (1,55%) dan pakaian (0,62%). Hasil ini dapat menggambarkan potensi kejadian dimana plastik menjadi komponen sampah laut dominan di pantai, secara khusus di Kecamatan Tombariri, Kabupaten Minahasa.Kata kunci: Sampah laut, Makro-debris, Jenis, Komposisi, Tasik-Ri