scholarly journals THE CHARACTERISTIC OF RECENT SEDIMENT IN SEGARA ANAKAN LAGOON, CIAMIS REGENCY, WEST JAVA

2016 ◽  
Vol 24 (2) ◽  
pp. 65
Author(s):  
I Wayan Lugra ◽  
Hananto Kurnio
Keyword(s):  
Key Words ◽  
High Intensity ◽  
Manganese Oxides ◽  
Major Element ◽  
Major Elements ◽  
Recent Sediment ◽  
Survey Area ◽  
West Java ◽  
Segara Anakan Lagoon ◽  
Smear Slide

The high intensity of erosions at the rivers upstream which are rivermouthed into the Segara Anakan Lagoon, as sources of the materials which are causing the sedimentation on the lagoon systematically. Based on smear slide analyses and major element contents, source of the sediment which is deposited in the lagoon floor, was predicted as the volcanic products. This condition is supported by the existence of non biogenic materials such as quartz, mica, ferro-oxides, manganese oxides and tuff in the lagoon. Beside that, the existence of major elements such as SiO2 (36,6 – 51,4%) Al2O3 (13,38 – 24,70%), and Fe2O3 (8,69 – 30,6%), is particular element indicators of volcanic products. The lithology in the survey area are volcanic products such as Jampang Formation and Panutuan Formation. Jampang Formation consist of volcano breccia, tuff intercalated with lava and sandstone, claystone, napal intercalated with conglomerate. Panutuan Formation consist of sandstone, napal and tuff, Formation Members of Tuff Napalan, Panutuan Formation, which are spread on the basinal area of Citanduy, Cibeureum, and Ciseel rivers which are rivermouthed into Segara Anakan Lagoon. Key words : smear slide, major element, Segara Anakan. Intensitas erosi yang tinggi di daerah hulu sungai-sungai yang bermuara di Segara Anakan sebagai sumber material yang mengakibatkan sedimetnasi laguna secara sistematis. Sumber pasokan sedimen yang diendapkan di dasar laguna berdasarkan analisis sayatan oles, dan unsur utama mineral diperkirakan merupakan produk vulkanik yang bersifat basa. Hal ini didukung oleh terdapatnya mineral non biogenik seperti mineral kuarsa, mika, oksida besi, oksida mangan yang dijumpai tersebar secara merata, adalah produk vulkanik, berupa tuff. Disamping itu keterdapatan unsur utama mineral seperti SiO2 dengan kisaran 36,6 – 51,4%, kemudian Al2O3 dengan kisaran 13,38 – 24,70% sedangkan Fe2O3 dengan kisaran 8,69 – 30,6%, merupakan mineral khas hasil produk vulkanik yang bersifat basa. Litologi daerah penelitian merupakan produk gunungapi, seperti Formasi Jampang yang tersusun oleh breksi gunungapi tuff dengan sisipan lava, berselingan dengan batupasir, batulempung napal dengan sisipan konglomerat. Formasi Panutuan yang tersusun batupasir, napal dan tuff, Anggota Tuff Napalan formasi Panutuan, dan berada di daerah rendahan sungai Citanduy, Cibeureum, Ciseel beserta anak anak sungainya yang bermuara di Segara Anakan. Kata kunci : sayatan oles, unsur utama, Segara Anakan

Dissolved trace metals and their relationship to major elements in the Manuherikia River, a pristine subalpine catchment in central Otago, New Zealand

1991 ◽  
Vol 42 (4) ◽  
pp. 409 ◽  
Author(s):  
WW Ahlers ◽  
JP Kim ◽  
KA Hunter
Keyword(s):  
New Zealand ◽  
Trace Metals ◽  
Major Element ◽  
Major Ions ◽  
Major Elements ◽  
Lower Altitude ◽  
Weathering Processes ◽  
Global Standards ◽  
Dissolved Silicon ◽  
Dissolved Trace Metals

The spatial distributions of the dissolved trace metals Cu, Ni, Cd, Zn and Pb and of reactive Hg have been measured in parallel with the major elements Na, K, Mg and Ca and electrical conductivity in three sampling events in the Manuherikia River, New Zealand. The geographical span of the sampling sites ranged from a pristine subalpine upper catchment area through lower altitude sites that are increasingly affected by both natural weathering processes and moderate agricultural and domestic runoff. Major-element concentrations in the upper catchment were at or below the 1% frequency minimum of the spectrum of global river compositions, indicating a highly pristine system. Concen- trations increased steadily downstream to levels similar to world average river water. All trace metals exhibited the same spatial trends as the major ions. Typical upper-catchment concentrations were very low by global standards: Cu (150 ng L-1), Ni (100-150 ng L-1), Cd (8 ng L-I), Zn (150-200 ng L-1), Pb (20-30 ng L-1) and Hg (0.3 ng L-1). Oceanic residence times calculated from the data for Zn (80 000 years) and Cd (230 000 years) for which few reliable estimates have been made, are consistent with observed correlations between the oceanographic distributions of these elements and dissolved silicon or phosphate, respectively.

scholarly journals PENGEMBANGAN KEMAMPUAN PEMAHAMAN KONSEP BILANGAN ROMAWI MELALUI PEMBELAJARAN IKAN VEVES DI SDN SEDARI I (PKM DI SD NEGERI SEDARI I DESA SEDARI KECAMATAN CIBUAYA KABUPATEN KARAWANG – JAWA BARAT)

2019 ◽  
Vol 1 (2) ◽  
pp. 27-35
Author(s):  
Ayu Fitri ◽  
Haerudin ◽  
Tridays
Keyword(s):  
Student Learning ◽  
Key Words ◽  
Learning Outcomes ◽  
Teacher Knowledge ◽  
Student Assessment ◽  
Student Learning Outcomes ◽  
West Java ◽  
Mathematical Abilities ◽  
Reasoning Skill

Pengabdian ini dilatarbelakangi oleh penilaian siswa terfokus terhadap hasil belajar siswa bukan kemampuan siswa, kurangnya pengetahuan guru tentang kemampuan matematika siswa, letak sekolah yang terpencil dekat dengan pantai. Kegiatan ini dilaksanakan di SD Negeri Sedari I Desa Sedari Kecamatan Cibuaya Kabupaten Karawang – Jawa Barat. Metode yang digunakan ekspositori, diskusi dan simulasi. Hasil kegiatan dapat dilihat dari persentasi kemampuan pemahaman siswa sebesar 90% dalam simulasi pembelajaran Ikan Veves dalam mengembagkan kemampuan pemahaman siswa pada materi bilangan romawi di SD Negeri Sedari I. Kata Kunci : Srategi Pembelajaran Ikan Veves, Kemampuan Pemahaman Matematika This service is motivated by student assessment focused on student learning outcomes rather than student abilities, lack of teacher knowledge about students' mathematical abilities, the location of remote schools close to the beach. This activity was carried out at SDN Sedari I Sedari Village, Cibuaya District, Karawang Regency, West Java. The method used expository, discussion and simulation. The results of the activity can be seen from the percentage of students 'understanding ability by 90% in the Fish Veves learning simulation in developing students' understanding abilities in roman numerals material at SDN Sedari I. Key Words: Ikan Veves Strategy, Reasoning Skill Mathematic

scholarly journals Tingkat Kapasitas Pembudidaya Ikan dalam Mengelola Usaha Akuakultur secara Berkelanjutan

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Anna Fatchiya
Keyword(s):  
Key Words ◽  
Random Sample ◽  
Family Size ◽  
Formal Education ◽  
High Capacity ◽  
T Test ◽  
West Java ◽  
Low Input ◽  
Business Function ◽  
Education Business

<p>This study was undertaken to identify fish farmer characteristic and supporting institutional, and to know the degree of fish farmer capacity to manage of aquabusiness sustainability. This was done by carrying out a survey involving random sample of 278 fish farmers from Bogor and Cianjur Districts of West Java Province. Both descriptive statistic and independent-samples T-test were used in analysing the data generated from the resesarch. Result presented showed that majority of fish farmers were low on formal education, non-formal education, business experience, family size, income, and business scale, but age was moderate. The supporting of institutional showed that support of financial institutional was low, input production institutional and marketing institutional was high, and information institutional was moderate. Performance of extension worker was low, and supporting of fish farmer group was high. Capacity of fish farmer as follows to practice of business function was moderate, to solve a problem was low, to plan of business and to adapt it to change of environment was high.<br />Key words: capacity, fish farmer, aquabusiness, sustainability</p>

scholarly journals Major element concentrations in Mangrove Pore Water, Sepetiba Bay, Brazil

2012 ◽  
Vol 60 (1) ◽  
pp. 33-39
Author(s):  
Christian J. Sanders ◽  
Renato G. S. Barcellos ◽  
Emmanoel V. Silva-Filho
Keyword(s):  
Pore Water ◽  
Major Element ◽  
Sea Water ◽  
Water Flux ◽  
Mangrove Ecosystem ◽  
Major Elements ◽  
Atlantic Rain Forest ◽  
Molar Ratios ◽  
Element Concentrations

Concentrations of cations and anions of major elements (Na+, Ca2+, Mg2+, K+, Cl-, SO4 2-) were analyzed in the pore water of a mangrove habitat. Site specific major element concentrations were identified along a four piezometric well transect, which were placed in distinct geobotanic facies. Evapotranspiration was evident in the apicum station, given the high salinity and major element concentrations. The station landward of an apicum was where major element/Cl- ratios standard deviations are greatest, suggesting intense in situ diagenesis. Molar ratios in the most continental station (4) are significantly lower than the nearby freshwater source, indicating a strong influence of sea water flux into the outer reaches of the mangrove ecosystem and encroaching on the Atlantic rain forest. Indeed, the SO4 2-/Cl- and Ca2+/Cl- ratios suggest limited SO4 2- reduction and relatively high Ca2+/Cl- ratios indicate a region of recent saltwater contact.

Highly mature sediments in the tropical monsoonal environment of southwestern India: an appraisal based on weathering indices

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Linu Babu ◽  
S. Vishnu Mohan ◽  
Mahesh Mohan ◽  
A.P. Pradeepkumar
Keyword(s):  
Major Element ◽  
Practical Implication ◽  
Source Area ◽  
Major Elements ◽  
Climatic Conditions ◽  
Element Geochemistry ◽  
Content Type ◽  
Electron Probe Micro Analyzer ◽  
Chemical Index ◽  
Provenance Areas

Purpose This paper aims to examine the geochemical change experienced by laterites in Kerala, India, subjected to tropical monsoonal climate. These sediments are underlain by hard rock. The source rock characteristics have a major stake on the ultimate composition of sediments, as also the climatic conditions which an area experience. Design/methodology/approach Core samples have been obtained from several locations in a lateritic plateau. The upper portions of the borehole cores are composed of the lateritic hard cap, followed by lateritic soils. The soil samples were subjected to sediment texture analysis and XRF analysis (Bruker S4 Pioneer Sequential Wavelength-Dispersive XRF) for the determination of major elements ((in oxide form). Findings Major element geochemistry has revealed the following order of relative proportions of elements (in oxide form) SiO2 > Al2O3 > Fe2O3 > TiO2 >> Na2O > P2O5 > CaO > K2O > MgO > MnO. Even though the concentrations of SiO2, Al2O3 and Fe2O3 contribute 90% of major element chemistry, there is no significant correlation found for these elements within themselves or with others. Research limitations/implications Microscale movement of elements could not be characterised in this study. This requires access to an electron probe micro analyzer. Practical implications The practical implication of tropical weathering is that enhanced chemical leaching leads to movement of most elements out of the system, except for Al, leading to the possible formation of bauxite, or aluminous laterite. Social implications The weathered products in this study provide livelihood sustenance for many of the local households, through manual production of laterite bricks, which are used in construction. Originality/value The indices of the intensity of chemical alteration/weathering like chemical index of alteration (CIA), chemical index of weathering (CIW) and weathering index of parker (WIP) reveal that the sediments indicate intense weathering of the source area prior to being deposited in the present location. This indicates enhanced monsoonal activity in the provenance areas, than that obtained today.

Chemical composition of plants associated with saline sites in Alberta in relation to mineral requirements for beef cattle

1996 ◽  
Vol 76 (3) ◽  
pp. 385-392
Author(s):  
J. J. Miller ◽  
B. J. Read ◽  
D. J. Wentz ◽  
D. J. Heaney
Keyword(s):  
Trace Elements ◽  
Beef Cattle ◽  
Major Element ◽  
Chemical Elements ◽  
Major Elements ◽  
Minimum Requirement ◽  
Adequate Nutrition ◽  
Chemical Composition Of Plants ◽  
Zinc Concentrations ◽  
Tolerable Level

Plant samples were collected from 102 saline sites in Alberta from 1990 to 1993 to determine major element and trace element concentrations in relation to mineral requirements for beef cattle. Zinc concentrations were most frequently (94%) below the minimum requirement for beef cattle, followed by Cu (92%), Se (87%), Na (49%), Mn (29%), K (21%), Mg (3%), Fe (1%) and S (1%). The element most frequently exceeding the maximum tolerable level for beef cattle was S (20%), followed by Mg (17%), Al (5%), Fe (5%) and Mo (1%). Beef cattle consuming plants from saline areas of Alberta are more likely to experience potential deficiencies than toxicities of chemical elements required for adequate nutrition. Key words: Major elements, trace elements, plants, saline areas, mineral requirements, beef cattle

K, Rb, Cs, Sr and Ba contents and Sr isotope ratios of ocean floor basalts

1971 ◽  
Vol 268 (1192) ◽  
pp. 573-587 ◽  
Keyword(s):  
Major Element ◽  
Major Elements ◽  
Oceanic Islands ◽  
Primary Level ◽  
Plate Movement ◽  
Spreading Ridges ◽  
Submarine Ridge ◽  
Fast Spreading ◽  
Alteration Minerals ◽  
High Level

Reliable analyses of K, Rb and Cs in dredge basalts require samples which show no petrographic evidence of alteration minerals and which have H 2 O + contents less than 0.7 %. Very fresh glass samples usually have H 2 O + levels of 0.1 to 0.2 %, and this probably represents the primary level of H 2 O in most submarine basalt magmas. A dredge haul containing both basalt and andesite was studied for major element and trace element variations. The major elements were consistent with a differentiation model involving crystallization of plagioclase, olivine, clinopyroxene and titanomagnetite. This differentiation had little effect on Sr concentration and on K/Rb and K/Cs ratios; these parameters are thus especially useful in studying mantle chemistry and partial melting processes. Twenty-eight unaltered dredge basalts were analysed, with K/Rb ratios varying from 360 to 1350. K contents of most samples, after correction for high level (shallow) differentiation processes, fall in the range 500 to 1200 parts/10 6 . A comparison of unaltered basalts from ‘fast-spreading ridges’ and ‘slowspreading ridges’ shows that K, Rb, Cs and Sr contents and K/Rb, K/Cs and Rb/Sr ratios are identical for both environments, while Ba contents and 87 Sr/ 86 Sr ratios may be significantly different. Thus mantle chemistry appears to be largely decoupled from the dynamic processes of plate movement. It is shown that submarine ridge basalts have lower 87 Sr/ 86 Sr ratios than the basalts of the oceanic islands, suggesting an early depletion of parts of the mantle in the dispersed elements. Average values for 15 samples from 11 different ridge localities: K = 1160 parts/10 6 ; Rb = 1.11 parts/ 10 6 ; Cs = 0.016 parts/10 6 ; Sr = 135 parts/10 6 ; Ba = 10 parts/10 6 ; K/Rb = 1060; K/Cs = 70000; Rb/Sr = 0.0082; 87 Sr/ 86 Sr = 0.70265.

scholarly journals Daya Hasil Galur-Galur Kacang Tanah (Arachis hypogaea L.) Tahan Penyakit Bercak Daun di Kecamatan Ciranjang Kabupaten Cianjur Provinsi Jawa Barat

2013 ◽  
Vol 1 (1) ◽  
pp. 45
Author(s):  
Yudiwanti Wahyu ◽  
Dede Rosyana Budiman
Keyword(s):  
Key Words ◽  
Arachis Hypogaea ◽  
Leaf Spot ◽  
Block Design ◽  
High Yield ◽  
West Java ◽  
Arachis Hypogaea L ◽  
Resistant Lines ◽  
Randomized Complete Block Design

<p style="text-align: justify;">This research was aimed to evaluate the yield of 16 peanut leafspot resistant lines derived from cross between Gajah variety and GPNC-WS 4 line with four check varieties of peanut. The four check varieties of peanut consist of Gajah, Jerapah, Zebra Putih, and Sima. The experiment was carried out at Ciranjang District, Cianjur Regency, West Java, from February to May 2011. This research was arranged in randomized complete block design with three replications. Result showed that GWS 39 D, GWS 110 D, GWS 18 A1, GWS 79 A, and GWS 110 A2 were identified as lines with high yield. GWS 74 D, GWS 39 B, GWS 79 A, GWS 73 D, GWS 18 A1, GWS 134 A1, and GWS 110 A1 were identified as lines with high resistant level to leafspot of peanut. Two of sixteen lines had high yield and high resistant level to leafspot, they were GWS 79 A and GWS 18 A1.</p><p>Key words : peanut, yield evaluation, leaf spot resistant</p>

scholarly journals POTENSI SELASIH SEBAGAI REPELLENT TERHADAP NYAMUK Aedes aegypti

2020 ◽  
Vol 13 (2) ◽  
pp. 39
Author(s):  
AGUS KARDINAN
Keyword(s):  
Essential Oil ◽  
Aedes Aegypti ◽  
Key Words ◽  
Dengue Hemorrhagic Fever ◽  
Active Ingredient ◽  
Liquid Paraffin ◽  
Hemorrhagic Fever ◽  
West Java ◽  
Hand Control ◽  
Better Than

ABSTRAK<br />Penyakit demam berdarah yang ditularkan oleh nyamuk Aedes<br />aegypti merupakan penyakit yang hampir selalu terjadi setiap tahunnya di<br />beberapa daerah di Indonesia. Salah satu cara untuk menghindarinya<br />adalah dengan penggunaan lotion anti nyamuk yang pada umumnya<br />berbahan aktif bahan kimia sintetis. Perlu dicari bahan alami yang lebih<br />aman dalam menghindari gigitan nyamuk, salah satunya adalah dengan<br />penggunaan selasih. Penelitian ini bertujuan untuk mengetahui daya<br />proteksi selasih (Ocimum gratisimum dan Ocimum bassilicum) terhadap<br />serangan nyamuk Aedes aegypti (vektor penyakit demam berdarah<br />dengue). Penelitian dilakukan di laboratorium Entomologi, Fakultas<br />Kedokteran Hewan, Institut Pertanian Bogor pada tahun 2006. Selasih<br />diuji dalam bentuk minyak atsiri yang diencerkan dengan parafin cair pada<br />konsentrasi 20%; 10%; 5% dan 2,5%. Nyamuk betina hasil perbanyakan di<br />laboratorium merupakan serangga uji yang disimpan di dalam kurungan<br />uji. Pengujian dilakukan dengan cara memasukkan lengan secara<br />bergantian antara yang diberi perlakuan dan kontrol (tidak diberi<br />perlakuan) ke dalam kurungan nyamuk dan dihitung jumlah nyamuk yang<br />hinggap setiap jam, selama enam jam. Hasil menunjukkan bahwa selasih<br />berpotensi sebagai pengusir (repellent) nyamuk dengan daya proteksi<br />tertinggi sebesar 79,7% selama satu jam dan rata-rata 57,6% selama enam<br />jam. O. gratisimum lebih baik dua kali lipat daya proteksinya daripada O.<br />bassilicum, hal ini terjadi karena diduga bahan aktifnya lebih beragam,<br />yaitu selain mengandung eugenol 37,35%, juga thymol (9,67%) dan<br />cyneol (21,14%) dibandingkan dengan O. bassilicum yang hanya mengan-<br />dung eugenol sebanyak 46%.<br />Kata kunci : Selasih, Ocimum gratisimum, Ocimum bassilicum., Aedes<br />aegypti, daya proteksi, Jawa Barat<br />ABSTRACT<br />Potency of Ocimum spp. as repellent to Aedes aegypti<br />mosquito<br />The objective of the research is to evaluate the protection ability of<br />Ocimum spp. (gratisimum and bassilicum) against Aedes aegypti mosquito<br />(vector of Dengue Hemorrhagic Fever). Ocimum was evaluated in the<br />form of essential oil diluted with liquid paraffin at concentrations of 20%;<br />10%; 5% and 2,5%. Female mosquitos reared in the laboratory were<br />placed in the cages. Alternately, treated and untreated hand (control) were<br />inserted into the cage containing mosquitos. The number of mosquitos<br />perched on the hand were counted every hour, lasting for six hours. Result<br />showed that Ocimum was prospecting to be developed as a mosquito<br />repellent, although its repellency was still under the repellency of synthetic<br />repellent (DEET). The repellency of O. gratisimum was better than O.<br />bassilicum since O. gratisimum possessing variety of active ingredient<br />beside eugenol (37.35%), such as thymol (9.67%) and cyneol (21.14)<br />compared to O. bassilicum which is only possessing eugenol as much as<br />46%.<br />Key words : Selasih, Ocimum gratisimum, Ocimum bassilicum, Aedes<br />aegypti, protection ability, West Java

Classification and Characterization of the Shape Memory Binary Alloys

2006 ◽  
Vol 980 ◽  
Author(s):  
Mitsuo Notomi ◽  
Krystyn J Van Vliet ◽  
Sidney Yip
Keyword(s):  
Crystal Structure ◽  
Shape Memory ◽  
Shape Recovery ◽  
Major Element ◽  
Binary Alloys ◽  
Major Elements ◽  
The Other ◽  
Atomic Composition ◽  
Group 5

AbstractAll shape memory binary alloys (SMBA) that exhibit not only perfect shape recovery but also partial shape recovery were reviewed and classified into three groups, B2, A2 and A1 type, according to the parent phases. There are the thirteen, six and eleven alloys belonging to B2, A2 and A1 type, respectively. In the group of B2 type SMBA the alloys are divided into two categories due to the combination of the elements. Over A1 and A2 type SMBA the atomic composition of one element is larger than the other so the larger one is called a major element. The major elements, Ti, U, Fe, and Cu, of A2 type SMBA do not belong to the group 5 and 6 in which the elements have a typical BCC (A2) crystal structure. In the A1 type SMBA there are four major elements, Mn, Fe, Co, and In and the SMBA except for In-based SMBA have ferromagnetic or antiferromagnetic natures. The shape memory effect (SME) for A1 (FCC) type SMBA might need the magnetic properties.

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