scholarly journals Explanation Of Marine Lake Formation At Misool Raja Ampat West Papua, Indonesia

2021 ◽  
Vol 72 ◽  
pp. 151-163
Author(s):  
Gandi Y.S. Purba ◽  
◽  
Lukas Rumenta ◽  
Purwanto Purwanto ◽  
Leontine E. Becking ◽  
...  
Keyword(s):  
Water Samples ◽  
Marine Terraces ◽  
Lake Formation ◽  
West Papua ◽  
The World ◽  
Marine Lakes ◽  
Cavity System ◽  
Global Sea Level ◽  
Δ18o And Δd ◽  
Sea Wall

Marine lake in a karst landscape is one of the macro karst forms known as doline and is only found in some locations in the world. Moreover, the theory of marine doline formation is always associated with global sea-level rise which differs from one place to another due to several factors. This research was conducted to understand the formation process of marine lakes in Misool and how the water fills the basins formed especially at Holocene time. This was achieved by obtaining information on the longest underwater terrace which is also the longest standing water position recorded on the sea wall. The marine terraces were measured by sounding profiles to the sea bordering the seven marine lakes including Lenmakana, Balbullol, Lenkafal, Keramat, Karawapop, Keramat-2, and Keramat-3 as well as Harapan Jaya Sea. A total of 24 profiles were measured and stable isotopes δ18O and δD of water samples were used to determine the origin of water in the lakes. The results showed the longest terrace was at the depth of ˗33 and ˗3 m while the references from the area closest to Misool showed the same water level positions at 10,500 BP and 6,985 BP. Furthermore, the composition of δ18O and δD from lake water indicated the water samples were a mixture of groundwater and seawater with the seawater having the more dominant concentration and this allows it to fill the lake first through a previously formed cavity system.

scholarly journals A Sensitive Near-Infrared Fluorescent Probe for Detecting Heavy Metal Ag+ in Water Samples

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 247 ◽  
Author(s):  
Yawen Zhang ◽  
Aiying Ye ◽  
Yuewei Yao ◽  
Cheng Yao
Keyword(s):  
Fluorescent Probe ◽  
Water Samples ◽  
Near Infrared ◽  
Color Change ◽  
World Health ◽  
Naked Eye ◽  
Real Water Samples ◽  
Frequent Use ◽  
The World ◽  
Health Organization

Silver is a common catalyst in industrial production, and the frequent use of Ag+ can cause water pollution. Thus, the detection of Ag+ in the environment is necessary to determine the level of pollution from silver. In this work, we designed a new, highly selective near-infrared (NIR) fluorescent probe QCy to detect Ag+. The probe exhibits “turn-off” fluorescence quenching responses at 760 nm towards Ag+ over other relevant cations, with outstanding sensitivity and a low detection limit (0.03 µM), which is considerably lower than the standard of the World Health Organization (WHO) for drinking water (0.9 µM). Meanwhile, QCy showed a very good linearity at a low concentration of Ag+ with a ‘naked eye’ visible color change of solution from blue to red. The probe has been applied successfully for the detection of Ag+ in real water samples.

MICROBIOLOGICAL ANALYSIS OF TILAPIA AND WATER IN AQUACULTURE FARMS FROM SINALOA

Biotecnia ◽  
2018 ◽  
Vol 20 (1) ◽  
pp. 20-26
Author(s):  
José Antonio Valenzuela-Armenta ◽  
Sylvia Páz Díaz-Camacho ◽  
Julio Adalberto Cabanillas-Ramos ◽  
Magdalena de Jesus Uribe-Beltrán ◽  
Mária del Carmen De la Cruz-Otero ◽  
...  
Keyword(s):  
Water Samples ◽  
Microbiological Quality ◽  
Fecal Coliforms ◽  
Aerobic Bacteria ◽  
Microbiological Analysis ◽  
Enterobacter Agglomerans ◽  
E Coli ◽  
The World ◽  
Fishery Products

Tilapia is the most cultivated fish around the world. The fish’s environment can harbor bacteria, especially coliforms, which are not normal biota of fish. These microorganisms are contamination indicator groups (IGs) reflecting the possible presence of pathogens, which can compromise the safety of fishery products. The IGs prevalence was estimated in tilapia and water from 29 aquaculture farms. Total and fecal coliforms (TC, FC), mesophilic aerobic bacteria (MAB), S. aureus, E. coli, Salmonella sp., and Streptococcus sp., were investigated. In tilapia, TC and FC were detected in 64% and 48% of the samples, ranging from 4.0 x 101 to 9.8 x 105, and from 1.0 x 101 to 6.4 x 103 CFU/g, respectively; MAB were detected in 90% of the samples. In water, TC and FC were detected in 57% and 35% of the samples, oscillating from 1.0 x 101 to 2.28 x104, and from 1.0 x 101 to 1.2 x 103 CFU/mL, respectively. MAB were detected in 89% of the water samples. Mostly E. coli and Enterobacter agglomerans were detected. Generally, IGs concentrations meet the Mexican regulations; however, the tilapia’s microbiological quality must be continuously monitored.

scholarly journals Fluoride Variations in Rivers on the Slopes of Mount Meru in Tanzania

2018 ◽  
Vol 2018 ◽  
pp. 1-18 ◽  
Author(s):  
Aldo J. Kitalika ◽  
Revocatus L. Machunda ◽  
Hans C. Komakech ◽  
Karoli N. Njau
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Laboratory Experiments ◽  
Fluoride Concentration ◽  
Ion Selective Electrode ◽  
World Health ◽  
Wet Season ◽  
Selective Electrode ◽  
Fluoride Ions ◽  
The World

This study reports the variations of fluoride ions in rivers on the slopes of Mount Meru in the northern part of Tanzania. More than 318 water samples were collected from Temi, Nduruma, Tengeru, and Maji ya Chai Rivers in both wet (mid-March and April) and dry (August) seasons. The samples were analyzed for fluoride levels using Ion Selective Electrode (ISE). The minimum and maximum average fluoride levels in the wet season were 0.24±0.03 mg/l and 65.20±0.03 mg/l, respectively, whereas the average lowest and highest levels in the dry season were 1.02±0.02 mg/l and 69.01±0.03 mg/l, respectively. Tengeru River had the lowest fluoride levels in both seasons, whereas Maji ya Chai recorded the highest fluoride levels in both seasons. The headwater of all rivers with the exception of Maji ya Chai met the World Health Organization’s (WHO) maximum acceptable fluoride levels of 1.50 mg/l and the downstream environment qualified for Tanzania Bureau of Standards (TBS) maximum permissible fluoride concentration in drinking water of 4.00 mg/l. Also, the laboratory experiments showed that fluoride containing rocks exposed to pH above 7.6 display high leaching of F− in solution which gradually increased with the increase in pH, indicating that dissolution of fluoride in water is a function of pH.

Eustatic and tectonic controls on Quaternary Ras Leona marine terraces (Strait of Gibraltar, northern Morocco)

2010 ◽  
Vol 74 (2) ◽  
pp. 277-288 ◽  
Author(s):  
Khalil El Kadiri ◽  
Carlos Sanz de Galdeano ◽  
Antonio Pedrera ◽  
Ahmed Chalouan ◽  
Jesús Galindo-Zaldívar ◽  
...  
Keyword(s):  
Tectonic Uplift ◽  
Passive Margin ◽  
Strait Of Gibraltar ◽  
Tectonic Event ◽  
Marine Terraces ◽  
The World ◽  
The Mediterranean ◽  
Subduction Setting

AbstractWell-preserved Quaternary staircased marine terraces appear on Ras Leona limestone relief. This is a peculiar sector of the Betic-Rif Cordillera, lying in the four-way junction between the Atlantic and the Mediterranean, and Europe and Africa. The age and altitude correlation of the Ras Leona terraces with travertine-covered lateral equivalent terraces fashioned in the neighbouring Beni Younech area, and comparison with those along the Moroccan Atlantic coasts, would suggest that the Ras Leona terraces were mainly formed by eustatic factors. The importance of the eustasy is supported by further comparisons with Spanish and Moroccan Mediterranean terraces and with different marine terraces developed on passive-margin coasts around the world. A tectonic event occurred mainly during the period between the formation of the Maarifian and the Ouljian terraces (i.e., between 370 and 150 ka). The moderate Quaternary tectonic uplift deduced from the marine terraces and its comparison with uplifted marine terraces developed in active subduction setting disagrees with the model of an active eastwards subduction below the Gibraltar tectonic arc.

scholarly journals Karakter Morfologi dan Potensi Produksi Beberapa Aksesi Sagu (Metroxylon spp.) di Kabupaten Sorong Selatan, Papua Barat

2016 ◽  
Vol 44 (1) ◽  
pp. 91 ◽  
Author(s):  
Ratih Kemala Dewi ◽  
Muhammad Hasyim Bintoro ◽  
Dan Sudradjat
Keyword(s):  
Starch Content ◽  
Morphological Characteristics ◽  
Potential Yield ◽  
Carbohydrate Source ◽  
Sago Palm ◽  
Crown Shape ◽  
West Papua ◽  
The World ◽  
Papua Barat ◽  
Starch Yield

ABSTRACT<br /><br />Sago palm is a carbohydrate source which has the highest carbohydrate content compared to the other crops. It can produce about 200-400 kg per trunk of sago dry starch. More than 50% sago palm population in the world are grown in Indonesia and 90% sago palm in Indonesia is found in Papua. This research was aimed to characterize several sago palm accessions in South Sorong District, West Papua. There were 12 accessions observed, i.e. Fasai, Fasampe, Falia, Fanomik, Fasongka, Fafion, Fakattao, Fanke, Fablen, Failik, Fakreit and Fasinan. Among these accessions, there were many differences based on morphological characteristics such as shoots color, crown shape, trunk height, number of leaf, existence of spine, starch content, also pith and starch color. Fablen was the only non-spiny type. Most of sago accessions were high yielding accessions with the potential yield more than 200 kg per trunk of sago dry starch. Fanomik had the highest potential yield. Sago palm productivity in the natural forest of Saifi Subdistrict, South Sorong District, West Papua was estimated to reach approximately 34.59 ton ha-1 per year of sago dry starch.   <br /><br />Keywords: accessions, starch, yield, food

Sukarno and Colonialism: An Analysis of Indonesia’s Foreign Policy Discourse, 1955-1961

2020 ◽  
Vol 16 (1) ◽  
pp. 1-17
Author(s):  
Ardhitya Eduard Yeremia
Keyword(s):  
Foreign Policy ◽  
Discourse Analysis ◽  
National Interest ◽  
Policy Discourse ◽  
Depth Analysis ◽  
West Papua ◽  
The World ◽  
Important Player ◽  
The Subject ◽  
The Republic

For the most part, the literature about Indonesia’s foreign policy does not stray far from a descriptive and chronological presentation of the subject. The fact of the matter is that an in-depth analysis of the nation’s foreign policy from a different era will impart valuable lessons to the current policymakers in charge of formulating and implementing such a policy. The era of Sukarno bore witness to the implementation of Indonesia’s foreign policy that was strong in ideas and practices. Employing discourse analysis, this article seeks to analyze five of Sukarno’s speeches, which were delivered in various international forums from 1955 to 1963. It demonstrates that during that time, Indonesia put forward a coherent and consistent foreign policy with colonialism as its master signifier. The promotion of such a discourse contributed positively to the diplomatic effort on the issue of West Papua by mobilizing supports from Asian-African nations, as well as attracting the interest of the superpowers. As a result, Indonesia’s national interest to bring West Papua into the Republic was well served, and furthermore, Indonesia succeeded in enhancing its image, role, and leadership in world affairs. This experience presents a challenge to the contemporary policymakers in producing a configuration of strong ideas and concepts that would allow the implementation of a foreign policy that serves the national interest, when the nation has once again risen as an important player on the world stage.

scholarly journals The Staircase Structure of the Southern Brazilian Continental Shelf

2009 ◽  
Vol 2009 ◽  
pp. 1-17
Author(s):  
M. S. Baptista ◽  
L. A. Conti
Keyword(s):  
Continental Shelf ◽  
Sea Level ◽  
Sea Level Changes ◽  
Devil's Staircase ◽  
The Earth ◽  
Devil’S Staircase ◽  
The World ◽  
Sea Level Variations ◽  
Staircase Structure ◽  
Global Sea Level

We show some evidences that the Southeastern Brazilian Continental Shelf (SBCS) has a devil's staircase structure, with a sequence of scarps and terraces with widths that obey fractal formation rules. Since the formation of these features is linked with the sea-level variations, we say that the sea level changes in an organized pulsating way. Although the proposed approach was applied in a particular region of the Earth, it is suitable to be applied in an integrated way to other shelves around the world, since the analyses favor the revelation of the global sea-level variations.

scholarly journals Citizen media and civil resistance in West Papua

2016 ◽  
Vol 22 (1) ◽  
pp. 38 ◽  
Author(s):  
Jason MacLeod
Keyword(s):  
Essential Role ◽  
Self Determination ◽  
Pacific Island ◽  
Military Operations ◽  
Media Activism ◽  
Civil Resistance ◽  
The Pacific ◽  
West Papua ◽  
The World ◽  
Making A Difference

This article charts the dynamics and trajectory of citizen media activism in West Papua’s fight for freedom which has progressed from not even registering in news rooms around the world to influencing sub-regional and regional bodies. Citizen media has played an essential role in this transformation. In 1998, when the Indonesian military massacred more than 100 unarmed West Papuans in Biak Island, it took weeks and months to get the news out. Back then West Papua was a military operations area (Daerah Operasi Militer). Few journalists were willing to risk travelling into the country to get the story out. In January 2016 West Papua remains an occupied colony. The Indonesian government still tries to curtail open access to West Papua for foreign journalists but courageous young people armed with cell phones are finding ways to bypass the government’s failed attempt at an informational blockade and it is making a difference. West Papuans are now members of the Melanesian Spearhead Group and the Pacific Island Forum is starting to take notice of the Pacific’s longest running self-determination and decolonisation struggle.

scholarly journals Determination of Hypoglycemic Agents in Surface Water Samples Using SPE-LC-MS/MS Method

2020 ◽  
Vol 71 (7) ◽  
pp. 337-346
Author(s):  
Vasile-Ion Iancu ◽  
Niculescu Marcela ◽  
Diana Puiu ◽  
Toma Galaon ◽  
Jana Petre ◽  
...  
Keyword(s):  
Surface Water ◽  
Water Samples ◽  
Emerging Contaminants ◽  
Solid Phase ◽  
Total Concentration ◽  
Hypoglycemic Agents ◽  
Number Of Patients ◽  
The World ◽  
Surface Water Samples

Antidiabetic compounds are a class of emerging contaminants in environment, for which there are no regulations in the world environmental legislation. These compounds are among the most widely used drugs in the world due to the large number of patients with diabetic conditions. The presence of these pollutants in the environment is insufficiently studied, so efficient analytical methods are needed to allow their detection at trace levels (ng/L). For the simultaneously quantification of the five antidiabetics (glyburide, metformin, glipizide, gliclazide, glimepiride) and one bio-degradation product (guanyl urea) in surface water samples a SPE-LC-MS/MS (solid phase extraction -liquid chromatography coupled with mass spectrometry detection) method was validated using real river water samples. The compounds were separated on C18 LC column in 9 minutes at 300C using a gradient of mobile phase of 0.1% formic acid and acetonitrile. Good performance parameters were obtained using the method: low limits of quantification (LOQs 0.1-2.4 ng/L), precision (repeatability 3.5-7.2% and reproducibility 6.5-12.7%) and determination coefficients (higher than 0.99). The most contaminated river was represented by Ialomita, which had a total concentration of antidiabetics of 112.1 ng/L in the downstream point, followed by the Siret and Dambovita rivers, which had a total concentration of antidiabetics of 66.3 ng/L and 57.3 ng/L, respectively, also in the downstream points.

scholarly journals Micro plastic Pollution in Coastal Water and Beach Sediments at Adyar and Cooum River Estuaries in Chennai Coast

2020 ◽  
Vol 9 (5) ◽  
pp. 511-514
Keyword(s):  
Fourier Transform ◽  
Infrared Spectrum ◽  
Water Samples ◽  
Plastic Pollution ◽  
The World ◽  
Beach Sediments ◽  
Infrared Spectrometer ◽  
Ftir Spectrometer ◽  
Different Shapes ◽  
Wind Currents

Plastics having number of applications all over the world and its great usage lead to rapid increase in plastic production and disposal. Around 400 million tons of plastics produced per year worldwide, out of this only 18% of plastics recycled that has led to its poor disposal practice because discharged plastics overcome in the environment for several 100 years either in their original or fragmented form. The fragmentation of particles are caused by several factors like wind currents, wave currents, abrasions etc., leading to various sizes which are classified as macro- (≥25mm), meso-(<25mm–5mm) micro- (<5mm–1μm) and further Nano-plastics (<1μm).This study manly focusses on quantification of Micro plastics which can be identified in different shapes such as spherical beads (pellets), films, fragments, foam, fibers etc., and are generally composed of polyethylene (0.91-0.97 g/mL), polypropylene (0.94 g/mL), polyvinyl chloride (1.4 g/mL), and polystyrene (1.05 g/mL). For this analysis of micro plastic existence, the water samples have been collected from two locations such as Adyar and Cooum estuaries. 10 samples have been collected each location and carried over to the laboratory for FTIR- Spectrometer (Fourier Transform Infrared Spectrometer) analysis along with the protocol laid by the NOAA. Typical infrared spectrum covers between 2.5 µm to 25 µm (4000 to 400 )

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