Preliminary Test of the EA-AGE3 System for 14C Measurement of CaCO3 Samples and Coral-Based Estimation of Marine Reservoir Correction in the Ogasawara Islands, Northwestern Subtropical Pacific

Radiocarbon ◽  
2019 ◽  
Vol 61 (5) ◽  
pp. 1593-1601
Author(s):  
Yoko Saito-Kokubu ◽  
Takehiro Mitsuguchi ◽  
Takahiro Watanabe ◽  
Tsutomu Yamada ◽  
Ryuji Asami ◽  
...  
Keyword(s):  
Coupled System ◽  
Preliminary Test ◽  
Scattered Data ◽  
Mean Value ◽  
Ryukyu Islands ◽  
Ogasawara Islands ◽  
Vacuum Line ◽  
The Ryukyu Islands ◽  
Age Correction ◽  
The Mean

ABSTRACTWe conducted a preliminary test of the coupled system of an elemental analyzer and the automated graphitization equipment Ionplus AGE3 (EA-AGE3 method) for accelerator mass spectrometry radiocarbon (AMS 14C) measurements of CaCO3 samples, by comparing with the conventional method where the samples are hydrolyzed in phosphoric acid and resulting CO2 gas is manually graphitized in a vacuum line (HPA method). The samples used in the test were the IAEA C2 travertine, fossil and modern corals from the Ryukyu Islands and the Ogasawara Islands, respectively (both are located in the northwestern subtropical Pacific). Results indicate that, relative to the HPA method, the EA-AGE3 method tends to cause an increase of ~0.4–0.5 pMC with more widely scattered data. This is presumably due to 14C contamination in the EA (the most likely cause seems to be a memory effect of 14C); this effect could be reduced by careful optimization of conditions and procedures in the EA process. The 14C data of pre-bomb annual bands (1931–1949 AD) in the modern Ogasawara coral obtained by the HPA method were used to estimate the marine reservoir 14C-age correction (ΔR) of this region; it ranges from –109 yr to –28 yr with the mean value with standard deviation of –81 ± 29 yr.

Eriocheir ogasawaraensis Komai, a new species of mitten crab (Crustacea: Decapoda: Brachyura: Varunidae) from the Ogasawara Islands, Japan, with notes on the systematics of Eriocheir De Haan, 1835

Zootaxa ◽  
2006 ◽  
Vol 1168 (1) ◽  
pp. 1 ◽  
Author(s):  
T. KOMAI ◽  
I. YAMASAKI ◽  
S. KOBAYASHI ◽  
T. YAMAMOTO ◽  
S. WATANABE
Keyword(s):  
New Species ◽  
Russian Far East ◽  
Far East ◽  
Ryukyu Islands ◽  
Crab Species ◽  
Ogasawara Islands ◽  
Mitten Crab ◽  
The Ryukyu Islands ◽  
A New Species ◽  
The Russian Far East

A new mitten crab species of the genus Eriocheir De Haan, 1835, E. ogasawaraensis n. sp., is described from the Ogasawara Islands, Japan. It is morphologically most similar to E. japonica (De Haan, 1835), found on the Japanese mainland, the Ryukyu Islands, Taiwan, the Russian Far East, Korea and China, but diagnostic is the proportionately broader and dorsally flattened carapace which usually lacks the fourth anterolateral tooth, the ornamentation of the epistome, the male first gonopod and its the coloration. The biology of the new species and the different interpretations concerning the systematics of Eriocheir are briefly discussed.

Redescription of the brackish water crab Ptychognathus glaber Stimpson, 1858 based on the topotypic material from the Ogasawara Islands and new record of P. lipkei N.K. Ng, 2010 from Japan (Decapoda: Brachyura: Varunidae)

Zootaxa ◽  
2021 ◽  
Vol 5048 (1) ◽  
pp. 58-76
Author(s):  
TOMOYUKI KOMAI ◽  
TADAFUMI MAENOSONO ◽  
TOSHIFUMI SAEKI ◽  
TOHRU NARUSE
Keyword(s):  
16S Rrna ◽  
Genetic Analysis ◽  
16S Rrna Gene ◽  
New Record ◽  
The Philippines ◽  
Rrna Gene ◽  
Ryukyu Islands ◽  
Ogasawara Islands ◽  
The Ryukyu Islands ◽  
Mitochondrial 16S Rrna Gene

Examination of material from various Japanese localities clarified that the estuarine crab Ptychognathus glaber Stimpson, 1858 is possibly restricted to the Ogasawara Islands, Japan. Specimens from the Ryukyu Islands, thought to represent P. glaber, actually represent P. lipkei N.K. Ng, 2010 instead, previously known only from Cebu, the Philippines. Ptychognathus glaber is redescribed in detail, and differentiating characters between it and P. lipkei are reassessed. Previous literature records of P. glaber are reviewed in the light of our findings. Genetic analysis using partial sequences of the mitochondrial 16S rRNA gene suggests that P. glaber is genetically closer to P. ishii Sakai, 1939 than to P. lipkei, and thus P. ishii is also compared morphologically with P. glaber.  

scholarly journals Pre-Bomb Marine Reservoir Ages in the Western Pacific

Radiocarbon ◽  
2010 ◽  
Vol 52 (3) ◽  
pp. 1197-1206 ◽  
Author(s):  
Kunio Yoshida ◽  
Tatsuaki Hara ◽  
Dai Kunikita ◽  
Yumiko Miyazaki ◽  
Takenori Sasaki ◽  
...  
Keyword(s):  
Western Pacific ◽  
Ryukyu Islands ◽  
Japanese Archipelago ◽  
The Ryukyu Islands ◽  
The Mean ◽  
The Japanese Archipelago ◽  
University Museum ◽  
The University ◽  
Specific Correction ◽  
The Western Pacific

In this study, molluscan shells housed at the University Museum, the University of Tokyo, provided a new set of region-specific correction values (ΔR) for the western Pacific, in particular for the central part of the main islands in the Japanese Archipelago and the southwest islands of Japan. The values of 40 total samples were calculated from 11 regions. North of the main islands and in the Ryukyu Islands, the mean ΔR values showed comparatively small values, 5–40 14C yr; in the central part of the main islands, these values were 60–90 14C yr.

scholarly journals APPLICATION OF A REALISTIC MATHEMATICAL APPROACH TO IMPROVE THE CAPACITY OF THE PROBLEM MATHEMATIC STUDENTS CLASS VII SMP NEGERI 3 SATU ATAP KUALA

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Elva . Bonica ◽  
Hasratuddin . .
Keyword(s):  
Problem Solving ◽  
Mathematical Problem ◽  
Preliminary Test ◽  
Mean Value ◽  
Mathematical Problem Solving ◽  
Mathematical Approach ◽  
Ability Test ◽  
Realistic Mathematics ◽  
The Mean ◽  
Better Than

ABSTRACT The purpose of this research is to know the improvement of students' mathematical problem solving ability after applying realistic mathematics approach of class VII-b SMP Negeri 3 Satu Atap Kuala and to describe that realistic mathematics approach is better than conventional learning. The subjects of the study were Class VII-b SMP Negeri 3 Satu Atap Kuala which amounted to 40 students. The object of this research is to improve students' mathematical problem solving ability through realistic mathematics approach class VII-b SMP Negeri 3 Satu Atap Kuala. This type of research is a classroom action research. In this study consists of two cycles, where at the end of each cycle is given a problem-solving test to determine students' mathematical problem solving abilities. The question form for each test is a description. The first procedure in this study was to give an initial skill test to class VII-b (to be studied) and class VII-a, in order to see students' early mathematical problem-solving abilities. The two held a lesson with the application of a realistic mathematical approach with rectangular subjects in class VII-b. Before the first action is given a preliminary test to determine the initial ability and early difficulty of students. From the preliminary results of the tests, the mean grade of grade VII-b is 53.75 and class VII-a is 53.625. After giving the action through realistic mathematics approach in cycle 1 in class VII-b, the mean value of problem solving ability test I was 70.83 with the number of students who have reached the classical learning completeness level of 24 students (60%) and conventional class VII -a is 60.17 with the number of students reaching the classical learning level of 9 students (22.5%). While after the improvement of cycle I in cycle II, the average value of problem solving test of class II VII-b is 81.83 with the number of students reaching the classical learning level of 37 students (92,5%) and class VII-a is 69.08 with the number of students reaching the classical learning level as much as 19 students (47,5%). Based on the results of this study indicate that by applying realistic mathematics approach on rectangular subjects in class VII-b SMP Negeri 3 Satu Atap Kuala can improve the problem solving ability of mathematical students and classes that are given a realistic mathematical learning approach is better than the class that is given conventional learning .Keywords: Problem Solving Abilities,  Realistic Mathematical Approach ABSTRAKTujuan penelitian ini adalah untuk mengetahui peningkatan kemampuan pemecahan masalah matematis siswa setelah diterapkan pendekatan matematika realistik kelas VII-b SMP Negeri 3 Satu Atap Kuala dan untuk mendeskripsikan bahwa pendekatan matematika realistik lebih baik daripada pembelajaran konvensional. Subjek penelitian adalah kelas VII-b SMP Negeri 3 Satu Atap Kuala yang berjumlah 40 siswa. Objek penelitian ini adalah untuk meningkatkan kemampuan pemecahan masalah matematis siswa melalui pendekatan matematika realistik kelas VII-b SMP Negeri 3 Satu Atap Kuala T.A 2016/2017. Jenis penelitian ini adalah penelitian tindakan kelas. Dalam penelitian ini terdiri dari dua siklus, dimana di akhir setiap siklus diberikan tes kemampuan pemecahan masalah untuk mengetahui kemampuan pemecahan masalah matematis siswa. Bentuk soal untuk setiap tes adalah uraian. Prosedur yang pertama pada penelitian ini adalah memberi tes kemampuan awal kepada kelas VII-b (yang akan diteliti) dan kelas VII-a, guna untuk melihat kemampuan pemecahan masalah matematis awal siswa. Kedua mengadakan pembelajaran dengan penerapan pendekatan matematika realistik dengan pokok bahasan segi empat di kelas VII-b. Sebelum tindakan dilakukan terlebih dahulu diberikan tes awal untuk mengetahui kemampuan awal dan kesulitan awal siswa. Dari hasil tes awal yag diperoleh menunjukkan bahwa nilai rata – rata kelas VII-b adalah 53,75 dan kelas VII-a adalah 53,625. Setelah pemberian tindakan melalui pendekatan matematika realistik pada siklus 1 di kelas VII-b, nilai rata – rata tes kemampuan pemecahan masalah I adalah 70,83 dengan jumlah siswa yang telah mencapai tingkat ketuntasan belajar klasikal sebanyak 24 siswa (60%) dan kelas konvensional VII-a adalah 60,17 dengan jumlah siswa yang mencapai tingkat belajar klasikal sebanyak 9 siswa (22,5%). Sedangkan setelah dilakukan perbaikan dari siklus I pada siklus II, nilai rata – rata tes kemampuan pemecahan masalah II kelas VII-b adalah 81,83 dengan jumlah siswa yang mencapai tingkat belajar klasikal sebanyak 37 siswa (92,5%) dan kelas VII-a adalah 69,08 dengan jumlah siswa yang mencapai tingkat belajar klasikal sebanyak 19 siswa (47,5%). Berdasarkan hasil penelitian ini menunjukkan bahwa dengan menerapkan pendekatan matematika realistik pada pokok bahasan segi empat di kelas VII-b SMP Negeri 3 Satu Atap Kuala dapat meningkatkan kemampuan pemecahan masalah matematis siswa dan kelas yang diberi pembelajaran pendekatan matematika realistik lebih baik daripada kelas yang diberi pembelajaran konvensional.Kata Kunci : Kemampuan Pemecahan Masalah,  Pendekatan Matematika Realistik

A review of the stink bug genus Plautia Stål from Japan (Hemiptera, Heteroptera, Pentatomidae)

Zootaxa ◽  
2019 ◽  
Vol 4564 (2) ◽  
pp. 470
Author(s):  
TADASHI ISHIKAWA ◽  
SEIICHI MORIYA
Keyword(s):  
New Species ◽  
Junior Synonym ◽  
Ryukyu Islands ◽  
Stink Bug ◽  
Ogasawara Islands ◽  
The Ryukyu Islands ◽  
Heteroptera Pentatomidae ◽  
Three New Species

In this review, we revise the pentatomine stink bug genus Plautia Stål from Japan. Five species are recognized and diagnosed, including three new species: P. sakishimensis sp. nov., P. himechabane sp. nov., and P. ishigaki sp. nov. One of these, P. himechabane sp. nov., was previously regarded as P. splendens Distant for the populations of the mainland of Japan, the Ryukyu Islands, and China. The species Plautia cyanoviridis Ruckes is proposed as a junior synonym of P. splendens, which is endemic to the Ogasawara Islands. A key is provided to facilitate the identification of the five species known in Japan. 

Long-period modulated superstructures in Pd-12.5 at.%Ce and Pd-15 at.%Ce alloys

1990 ◽  
Vol 48 (4) ◽  
pp. 164-165
Author(s):  
Noriyuki Kuwano ◽  
Masaru Itakura ◽  
Kensuke Oki
Keyword(s):  
Electron Microscopy ◽  
Mean Value ◽  
Heavy Elements ◽  
Arc Furnace ◽  
X Ray ◽  
Long Period ◽  
Ultra High Purity ◽  
Heat Treated ◽  
Atomic Scattering ◽  
The Mean

Pd-Ce alloys exhibit various anomalies in physical properties due to mixed valences of Ce, and the anomalies are thought to be strongly related with the crystal structures. Since Pd and Ce are both heavy elements, relative magnitudes of (fcc-fpd) are so small compared with <f> that superlattice reflections, even if any, sometimes cannot be detected in conventional x-ray powder patterns, where fee and fpd are atomic scattering factors of Ce and Pd, and <f> the mean value in the crystal. However, superlattices in Pd-Ce alloys can be analyzed by electron microscopy, thanks to the high detectability of electron diffraction. In this work, we investigated modulated superstructures in alloys with 12.5 and 15.0 at.%Ce.Ingots of Pd-Ce alloys were prepared in an arc furnace under atmosphere of ultra high purity argon. The disc specimens cut out from the ingots were heat-treated in vacuum and electrothinned to electron transparency by a jet method.

Partition Coefficient Ratios and Tumour Perfusion Studied with 85mKr and 133Xe

1987 ◽  
Vol 26 (06) ◽  
pp. 253-257
Author(s):  
M. Mäntylä ◽  
J. Perkkiö ◽  
J. Heikkonen
Keyword(s):  
Partition Coefficient ◽  
Partition Coefficients ◽  
Regional Blood Flow ◽  
Blood Perfusion ◽  
Compartmental Analysis ◽  
Malignant Tumour ◽  
Mean Value ◽  
Perfusion Rate ◽  
Biological Variables ◽  
The Mean

The relative partition coefficients of krypton and xenon, and the regional blood flow in 27 superficial malignant tumour nodules in 22 patients with diagnosed tumours were measured using the 85mKr- and 133Xe-clearance method. In order to minimize the effect of biological variables on the measurements the radionuclides were injected simultaneously into the tumour. The distribution of the radiotracers was assumed to be in equilibrium at the beginning of the experiment. The blood perfusion was calculated by fitting a two-exponential function to the measuring points. The mean value of the perfusion rate calculated from the xenon results was 13 ± 10 ml/(100 g-min) [range 3 to 38 ml/(100 g-min)] and from the krypton results 19 ± 11 ml/(100 g-min) [range 5 to 45 ml/(100 g-min)]. These values were obtained, if the partition coefficients are equal to one. The equations obtained by using compartmental analysis were used for the calculation of the relative partition coefficient of krypton and xenon. The partition coefficient of krypton was found to be slightly smaller than that of xenon, which may be due to its smaller molecular weight.

Detection of Soluble Fibrin Monomer Complexes in Blood by Means of Protamine Sulphate Test

1968 ◽  
Vol 20 (01/02) ◽  
pp. 044-049 ◽  
Author(s):  
B Lipiński ◽  
K Worowski
Keyword(s):  
Human Subjects ◽  
Coronary Thrombosis ◽  
Mean Value ◽  
Healthy Human ◽  
Protamine Sulphate ◽  
Soluble Fibrin ◽  
Fibrin Monomer ◽  
Dog Plasma ◽  
The Mean ◽  
Precipitable Protein

SummaryIn the present paper described is a simple test for detecting soluble fibrin monomer complexes (SFMC) in blood. The test consists in mixing 1% protamine sulphate with diluted oxalated plasma or serum and reading the optical density at 6190 Å. In experiments with dog plasma, enriched with soluble fibrin complexes, it was shown that OD read in PS test is proportional to the amount of fibrin recovered from the precipitate. It was found that SFMC level in plasma increases in rabbits infused intravenously with thrombin and decreases after injection of plasmin with streptokinase. In both cases PS precipitable protein in serum is elevated indicating enhanced fibrinolysis. In healthy human subjects the mean value of OD readings in plasma and sera were found to be 0.30 and 0.11, while in patients with coronary thrombosis they are 0.64 and 0.05 respectively. The origin of SFMC in circulation under physiological and pathological conditions is discussed.

Detection of Circulating Tissue Factor and Factor VII in a Normal Population

1996 ◽  
Vol 75 (05) ◽  
pp. 772-777 ◽  
Author(s):  
Sybille Albrecht ◽  
Matthias Kotzsch ◽  
Gabriele Siegert ◽  
Thomas Luther ◽  
Heinz Großmann ◽  
...  
Keyword(s):  
Tissue Factor ◽  
Normal Population ◽  
Mean Value ◽  
Factor Vii ◽  
Significant Difference ◽  
Age Dependent ◽  
The Mean ◽  
Highly Correlated ◽  
And Gender

SummaryThe plasma tissue factor (TF) concentration was correlated to factor VII concentration (FVIIag) and factor VII activity (FVIIc) in 498 healthy volunteers ranging in age from 17 to 64 years. Immunoassays using monoclonal antibodies (mAbs) were developed for the determination of TF and FVIIag in plasma. The mAbs and the test systems were characterized. The mean value of the TF concentration was 172 ± 135 pg/ml. TF showed no age- and gender-related differences. For the total population, FVIIc, determined by a clotting test, was 110 ± 15% and the factor VIlag was 0.77 ± 0.19 μg/ml. FVII activity was significantly increased with age, whereas the concentration demonstrated no correlation to age in this population. FVII concentration is highly correlated with the activity as measured by clotting assay using rabbit thromboplastin. The ratio between FVIIc and FVIIag was not age-dependent, but demonstrated a significant difference between men and women. Between TF and FVII we could not detect a correlation.

Determination of Plasminogen in Clots and Thrombi

1966 ◽  
Vol 16 (01/02) ◽  
pp. 038-050 ◽  
Author(s):  
Ulla Hedner ◽  
Inga Marie Nilsson ◽  
B Robertson
Keyword(s):  
Mean Value ◽  
Main Mechanism ◽  
Clot Lysis ◽  
Post Mortem ◽  
Digestion Time ◽  
Normal Volunteers ◽  
Casein Solution ◽  
The Mean

SummaryThe plasminogen content was determined by a casein method in plasma and serum from 20 normal volunteers. The mean plasminogen content was found to be 10.1 ACU (the arbitrary caseinolytic unit defined in such a way that using a 3% casein solution and a digestion time of 20 min. at 37°C, 10 ACU gave an extinction of 0.300). No difference between serum and plasma regarding the plasminogen content was found.Plasminogen was determined in drained and drained plus washed clots prepared from 2 ml plasma. The highest values found in the drained clots were 0.9 ACU/clot and 0.2 ACU/clot in the drained plus washed clots.Plasminogen was also determined in drained and drained plus washed clots prepared from plasma with added purified plasminogen. The plasminogen was recovered in the washing fluid. According to these tests, then, purified added plasminogen is washed out of the clots.The plasminogen content of 20 thrombi obtained post mortem was also determined. The mean value was found to be 0.7 ACU/cm thrombus. Judging from our results, the “intrinsic clot lysis theory” is not the main mechanism of clot dissolution.

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