12,419 research outputs found
Analysis of Lead (Pb) in the Coastal of Kupa Kupa Village, South Tobelo Dictrict, North Halmahera Regency: Analisis Kandungan Timbal (Pb) Pada Perairan Pantai Desa Kupa Kupa, Kecamatan Tobelo Selatan, Kabupaten Halmahera Utara
No full textHuman activities in coastal waters such as transportation, industry, tourism, settlements, and agriculture are the main factors that cause changes in water quality. Changes in water quality can be the beginning of pollution if the value of the water quality parameter has exceeded the seawater quality standard. One form of marine pollution is heavy metal pollution, and the metal most commonly found in coastal waters is lead (Pb). Therefore, the purpose of this study is to analyze the content of lead (Pb) on the coastal of Kupa Kupa Village, South Tobelo District, North Halmahera Regency. In this study, sampling was carried out using the purposive sampling method, where the water samples used were taken at predetermined points along the coastal waters of Kupa Kupa Village, South Tobelo District, North Halmahera Regency. Sampling of seawater was carried out using a sampling pole with a water depth of 5 m, then the samples were analyzed according to SNI 6989.8.2009. The results of the analysis are then described qualitatively. The results showed that the quality of the coastal waters of Kupa Kupa Village ranged from 32 – 34°C, salinity 27 – 34 ppt, pH 8.9 – 9.3, DO 7.88 – 7.91 mg/l, brightness 1 – 5.9 m, and current 0.05 – 0.12 ms-1. Meanwhile, the concentration of lead (Pb) in water in the coastal waters of Kupa Kupa Village, South Tobelo District, which is in the range of 0.50-0.78 mg/L, where this concentration has exceeded the seawater quality standards. Thus, the coastal waters of Kupa Kupa Village have been contaminated with lead metal which will be threatening for the life of marine biota and will also have an impact on human health.Human activities in coastal waters such as transportation, industry, tourism, settlements, and agriculture are the main factors that cause changes in water quality. Changes in water quality can be the beginning of pollution if the value of the water quality parameter has exceeded the seawater quality standard. One form of marine pollution is heavy metal pollution, and the metal most commonly found in coastal waters is lead (Pb). Therefore, the purpose of this study is to analyze the content of lead (Pb) on the coastal of Kupa Kupa Village, South Tobelo District, North Halmahera Regency. In this study, sampling was carried out using the purposive sampling method, where the water samples used were taken at predetermined points along the coastal waters of Kupa Kupa Village, South Tobelo District, North Halmahera Regency. Sampling of seawater was carried out using a sampling pole with a water depth of 5 m, then the samples were analyzed according to SNI 6989.8.2009. The results of the analysis are then described qualitatively. The results showed that the quality of the coastal waters of Kupa Kupa Village ranged from 32 – 34°C, salinity 27 – 34 ppt, pH 8.9 – 9.3, DO 7.88 – 7.91 mg/l, brightness 1 – 5.9 m, and current 0.05 – 0.12 ms-1. Meanwhile, the concentration of lead (Pb) in water in the coastal waters of Kupa Kupa Village, South Tobelo District, which is in the range of 0.50-0.78 mg/L, where this concentration has exceeded the seawater quality standards. Thus, the coastal waters of Kupa Kupa Village have been contaminated with lead metal which will be threatening for the life of marine biota and will also have an impact on human health
Pengaruh kombinasi zat pengatur tumbuh Indole Butiric Acid (IBA) dengan Benzil Amino Purin (BAP) pada pertumbuhan tanaman kupa (Syzygium polycephalum (Miq.) Merr. & Perry) secara In Vitro
No full textKupa merupakan tanaman asli Jawa Barat dengan rasa khas asam manis pada buahnya. Tanaman kupa sering dijadikan sebagai bonsai dan kayunya bisa dipakai sebagai bahan bangunan, akan tetapi budidaya kupa saat ini sangat terbatas dan cenderung lama sehingga kupa mengalami kelangkaan. Kultur jaringan merupakan salah satu cara perbanyakan tanaman kupa dalam kondisi aseptik secara in vitro yang dapat menghasilkan bibit tanaman kupa dalam jumlah banyak dan waktu singkat. Penambahan zat pengatur tumbuh dapat menjadi alternatif dalam meningkatkan persentase tumbuh. BAP dan IBA merupakan zat pengatur tumbuh yang dapat meningkatkan pertumbuhan eksplan tunas kupa yang berfungsi dalam pembentukan tunas dan akar. Penelitian dilaksanakan di Laboratorium Terpadu UIN Sunan Gunung Djati Bandung dari maret-oktober 2015. Penelitian ini terdiri dari dua tahap, pertama efektifitas teknik sterilisasi eksplan tunas kupa dengan empat metode sterilisasi. Kedua, analisis zat pengatur tumbuh BAP 2 mg L-1 dengan penambahan berbagai konsentrasi IBA pada media MS yang terdiri dari perlakuan: A (MS), B (MS BAP 2 mg L-1), C (MS BAP 2 mg L-1 + IBA 0,2 mg L-1), D (MS BAP 2 mg L-1 + IBA 0,4 mg L-1), E (MS BAP 2 mg L-1 + IBA 0,6 mg L-1), F (MS BAP 2 mg L-1 + IBA 0,8 mg L-1) dan G (MS BAP 2 mg L-1 + IBA 1 mg L-1). Hasil penelitian menunjukan bahwa kombinasi zat pengatur tumbuh BAP dan IBA pada media MS mempengaruhi pertumbuhan dan ketahanan hidup suatu eksplan ditandai dengan pertumbuhan tunas yang mencapai 40 % dalam waktu 7 MST pada perlakuan F (MS BAP 2 mg L-1 + IBA 0,8 mg L-1). Respon pertumbuhan terbaik terdapat pada perlakuan B (MS BAP 2 mg L-1) ditandai dengan munculnya kalus dan tunas tercepat serta pertumbuhan yang bagus
Optimasi komposisi media untuk mikropropagasi tanaman kupa (Syzygium polycephalum (Miq.) Merr. & L.M Perry)
No full textKupa (Syzygium polycephalum (Miq.) Merr. & L.M Perry) merupakan tanaman berkayu yang dapat dijadikan sebagai bahan obat dan zat pewarna. Kupa sudah jarang ditemukan di beberapa wilayah Indonesia, oleh karena itu diperlukan upaya konservasi. Kultur jaringan adalah salah satu teknik yang dapat diaplikasikan untuk perbanyakan tanaman dan konservasi. Penelitian ini bertujuan untuk mendapatkan komposisi media yang optimum untuk mikropropagasi kupa. Penelitian terdiri atas 3 tahap percobaan, yaitu multiplikasi tunas menggunakan eksplan buku tunggal dan tunas pucuk pada media dasar DKW dan MS, yang mengandung BAP dan IBA; perakaran menggunakan substrat agar atau campuran pasir + vermikulit, ditambah larutan DKW atau MS, dan IBA; dan aklimatisasi. Semua percobaan menggunakan Rancangan Acak Lengkap Faktorial. Hasil penelitian menunjukkan bahwa media MS + BAP 1 mg L-1 + IBA 0,1 mg L-1 merupakan media terbaik untuk perbanyakan dan tinggi tunas dari eksplan buku tunggal. Tunas terbanyak dari eksplan tunas pucuk didapatkan dari media DKW + BAP 1 mg L-1 + IBA 0,1 mg L-1. Media Pasir + Vermikulit dengan larutan MS maupun DKW memberikan 100% tunas berakar. Planlet yang berasal dari media pasir + vermikulit dengan pemberian larutan MS menghasilkan jumlah dan panjang akar lebih baik, dan daya hidup tertinggi pada tahap aklimatisasi.ABSTRACTKupa (Syzygium polycephalum (Miq.) Merr. & L.M Perry) is a woody plant, which has many benefits including herbal medicine and coloring matter. Kupa is rarely found in some parts of Indonesia, therefore the conservation is needed. Tissue culture is a technique applied for propagation and conservation. This study aimed to obtain the optimal media composition for kupa micropropagation. The study consisted of 3 steps, i.e. shoot multiplication using single node and shoot tips explants cultured in basic media DKW and MS containing BAP and IBA; rooting in two different substrates, agar and a mixture of vermiculite + sand, enriched with DKW or MS solution, and IBA; and acclimatization. All experiments used a factorial completely randomized design. The results showed that MS +BAP 1 mg L-1 + IBA 0.1 mg L-1 was the best for shoot multiplication and shoot height from single node explants. Media of DKW + BAP 1 mg L-1+ IBA 0.1 mg L-1 was the best for multi-shoots from shoot tip explant. Sand + vermiculite media with MS or DKW solution produced 100% rooted-plantlets. Plantlets derived from sand + vermiculite with MS solution gave the best root number and length, and it also the highest survival rate at the acclimatization stage
Ms. Courtney Chartier, RWWL AUC, August 2011
No full textThis video is a conversation with Ms. Courtney Chartier. Ms. Chartier talks about her work on the "New Georgia Encyclopedia" and "Online Voter Education Project." Andrea Jackson, AUC Woodruff Library, is the interviewer
Ms. Neely Terrell, RWWL AUC, March 2012
No full textThis video is a conversation with Ms. Neely Terrell. Ms. Terrell talks about her book, "Super Singles Activate". Anthony Kinsey and Jahnesta Horney, AUC Woodruff Library, are the interviewers
Ms. Felesha Love, Spelman College, January 2016
No full textThis video is a conversation with Felesha Love. Ms. Love talks about her book, "Brave Leap to Freedom: Integrating Mind, Body, and Spirit to Cultivate Healthy Relationships". Jordan Moore, AUC Woodruff Library, is the interviewer
Magnetic properties as indicators of toxic elements pollution in surface sediments of the Vlasina River (Serbia) and Kupa River (Croatia)
No full textThe relationships between magnetic susceptibility (MS) and elemental variations have been the focus of considerable study in the fields of environmental assessment. The aim of this study was to apply a rapid and inexpensive, low-field magnetic susceptibility method to stream sediments from Vlasina (Serbia) and Kupa (Croatia) river basins, and discuss the relationships between MS and content of 26 studied elements using statistical approaches.
In this research, magnetic susceptibility was measured using SM30, a small magnetic susceptibility meter with a very high sensitivity of 1 × 10-7
SI. Inductively Coupled Plasma Optical Emission Spectroscopy was used to determine the concentration of the studied elements, after sequential
extraction procedure (Sakan et al., 2016). Total concentrations of each element were determined as the sum of concentrations determined in each fraction.
The Kupa River basin, occupies the west-central part of Croatia and is shared by two neighboring countries (Slovenia, Bosnia and Herzegovina). The Kupa itself is a tributary to the Sava River and meets the latter at Sisak after traversing a distance of 294 km. The river basin is one of the most significant water resources in Croatia (Frančišković-Bilinski et al., 2012).
Vlasina River Basin covers an area of 1061.72 km² and covers the south eastern part of Serbia. The total length of Vlasina River is 65.9 km. The largest part of the geological base of the Vlasina River Basin belongs to the Serbo-Macedonian mass, formed in the Palaeozoic (Carbon-Perm) (Durlević et al., 2019).
Correlation analysis was performed to reveal statistical correlations between MS and 26 elements analyzed by ICP-OES in Kupa sediment samples. Ten of them showed negative correlation (As, B, Ba, Fe, K, Li, Mg, Na, P, S), while other elements showed positive. Chromium showed excellent correlation with MS (0.91) and is element with the highest correlation to MS, what could indicate its anthropogenic origin. Element with strongest correlation to MS after Cr is vanadium (0.62), followed by Mn (0.52), Al (0.52) and Cd (0.50). All other elements have rather weak correlation with MS, among which highest are those of Sr (0.45), Zn (0.35), Be (0.28), Co (0.27), Pb (0.27) and Ti (0.26).
Measured MS values in Vlasina samples are mostly very low, with several locations where values are a bit higher; they range from 0.02 x 10-3
to 1.113 x 10-3 SI units. The strongest correlation was observed with Mo (0.43), then with Ag (0.29). Correlations > 0.10 are determined between MS and following elements: Zn (0.17); Cu (0.12); Pb (0.17); Ba (0.13); Mn (0.10); Ti (0.20); V (0.21); In (0.16); Sn (0.16); Tm (0.10); Lu (0.12); Hg (0.16); Bi (0.13); Th (0.15) and U (0.24). Correlation analysis between MS and measured chemical elements has shown that strong correlations do not exist.
From that it could be concluded that in Vlasina samples there is no significant anthropogenic influence
Use of the new dynamic cone penetrometer for the study of soil liquefaction along the Kupa River, Petrinja area (Croatia)
No full textVoir également : https://irsn.hal.science/hal-04414299v1International audienceDuring the Petrinja earthquake sequence in December 2020, numerous liquefied sand ejections came to the surface along the Kupa, Sava and Glina rivers in Quaternary alluvial sediments. In October 2022, we performed field investigation in the epicentral area, involving geotechnical and geophysical techniques, at different sites with sand ejecta or lateral spreading along the Kupa river. Geotechnical soundings were carried out with variable energy dynamic cone penetrometer. We used both Light Dynamic Penetrometer (DPL-Panda) and its Super Heavy version (DPSH-Grizzly), to evaluate the soil characteristics and to specify the geometries of the various subsurface sedimentary layers. This paper presents one of the ground site models based on DPL and DPSH tests along with Electrical Resistivity Tomography (ERT) profiles. The resulting models will contribute to a better understanding of mechanical characteristics of soils and their potential to liquef
Étude sur le patois de Valbonnais
No full textA lexical and morphologic description of Valbonnais dialect. A 319-page PhD dissertation under the direction of Prof. Antonin DURAFFOUR (Univ. Stendhal, Grenoble, France, 1943)Description lexicale et morphologique du patois de Valbonnais sous la forme d'un manuscrit de 319 pages.Thèse sous la direction du Prof. Antonin DURAFFOUR (Univ. Stendhal, Grenoble, 1943
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