scholarly journals Kronologi dan Variabilitas Temuan Situs-Situs Kubur Batu di Pulau Sangihe Bagian Selatan

2021 ◽  
Vol 19 (2) ◽  
pp. 111-122
Author(s):  
Sriwigati Sriwigati ◽  
Muh. Fadhlan Syuaib Intan Intan ◽  
Nasrullah Azis ◽  
Henki Riko ◽  
Aisyah Arung Qalam Qalam ◽  
...  
Keyword(s):  
Thin Section ◽  
South China ◽  
Laboratory Analysis ◽  
Material Source ◽  
Section Method

Kubur batu merupakan tinggalan megalitik yang sangat menonjol di Pulau Sangihe bagian selatan, sampai saat ini tercatat di 45 lokasi situs, 2 lokasi sumber bahan, dan jumlah kubur batu 699. Variabilitas temuan lainnya yang konteks dengan kubur batu, ditemukan pada saat survei yakni fragmen tembikar, keramik dan logam. Tulisan ini akan mengetengahkan tentang analisis laboratoris temuan tembikar, keramik dan logam tersebut. Kajian data berdasarkan penelitian survei dan ekskavasi dan kemudian dilanjutkan dengan analisis laboratoris melalui uji XRF dan sayatan tipis untuk temuan fragmen tembikar dan logam. Tembikar yang ditemukan berupa tembikar polos dengan bentuk wadah berupa periuk dan mangkuk. Berdasarkan analisis laboratorium dapat diketahui tembikar dari Pulau Sangihe kemungkinan merupakan tembikar produksi lokal.Analisis keramik diketahui berasal dari Cina, Cina Selatan, Eropa, dan Jepang. Kronologi keramik hasil penelitian dari abad ke 15–19 Masehi.   Stone graves are prominent megalithic remains in the southern part of Sangihe Island. They are distributed in 45 site locations and 2 material source locations. The number of the stone graves is 699. Pottery, ceramic and metal fragments in the same context as the stone graves were found during the survey. This article will report the results of a laboratory analysis of the pottery, ceramic and metal findings. The data collected during the survey and excavation underwent a laboratory analysis. The pottery and metal fragments were tested by using the XRF technique and the thin section method. The pottery fragments found are plain pots and bowls. Based on the laboratory analysis, it is supposed that the pottery found in Sangihe Islands was locally produced. The analysis indicates that the ceramic fragments originated in China, South China, Europe and Japan. Chronologically, the ceramic fragments originated in the 15th-19th centuries.

Localization of lectin binding sites in the lens of rats: A study by a labeling frozen thin-section method

1990 ◽  
Vol 48 (3) ◽  
pp. 918-919
Author(s):  
Toshikazu Tanaka ◽  
Masahiro Sakai ◽  
Nobuo Ihara ◽  
Yoshihito Honda ◽  
Kazuo Ogawa
Keyword(s):  
Thin Section ◽  
Binding Sites ◽  
Structural Characteristics ◽  
Lectin Binding ◽  
Light Microscope Level ◽  
Thin Sections ◽  
Section Method ◽  
Cell Membrane Proteins ◽  
Complex Procedure ◽  
Lectin Binding Sites

In various tissues, many investigators have reported that sugar residues of cell-membrane proteins participate important functions such as cellular recognition, adhesion and differentiation. As an organ, the lens has distinct polarity from anterior to posterior face as one of its unique structural characteristics. However, a only few studies have been performed about the localization of sugar residues at light-microscope level. The purpose of this study is to detect lectin binding sites in lenses of normal rats and Ihara Cataract Rats (ICR) by utilizing a labeling frozen thin-section method.The lectins, concanavalin A (Con A) and wheat germ agglutinin (WGA) were used in this study. Wistar rats and ICR rats which develop hereditary cataracts were used as experimental animals. For light microscopy, frozen semi-thin sections were stained with the lectins, using an avidin-biotin-complex procedure and visualized by incubation with 0.1% diaminobenzidine (DAB) and 0.01% H2O2 in PBS.

DIFFERENTIAL WEATHERING OF DIAGENETIC CONCRETIONS AND THE FORMATION OF NEOPROTEROZOIC ANNULATED DISCOIDAL STRUCTURES

Palaios ◽  
2021 ◽  
Vol 36 (1) ◽  
pp. 15-27
Author(s):  
MAXWEL F. SCHWID ◽  
SHUHAI XIAO ◽  
MORRISON R. NOLAN ◽  
ZHIHUI AN
Keyword(s):  
Thin Section ◽  
South China ◽  
Energy Dispersive Spectroscopy ◽  
Chemical Weathering ◽  
Transmitted Light ◽  
Energy Dispersive ◽  
Tool Marks ◽  
Bedding Planes ◽  
Biological Structures

ABSTRACT Annulated discoidal structures are common in many Neoproterozoic and particularly Ediacaran successions. Their interpretations, especially their biogenicity, are often contentious. Some of them (e.g., Aspidella and related forms) are demonstrably biological structures and may represent holdfasts of frondose Ediacara-type organisms. Others may represent fluid escape structures or tool marks produced by the rotation of tethered organisms. Here we show that differential chemical weathering of diagenetic dolomite concretions can also produce annulated discoidal structures that could be mistaken as Ediacara-type discoidal fossils. Using transmitted-light and cathodoluminescence microscopy in conjunction with Raman and energy dispersive spectroscopy, we analyzed dolomitized discoidal concretions embedded in a phosphorite matrix from the Ediacaran Miaohe Member of South China. Our observations reveal that pervasive and displacive syn-compactional dolomitization of the concretions and differential compaction of surrounding sediment led to the formation of biconvex or upward-convex primary laminae within the concretions. When exposed along parting surfaces and/or bedding planes, disparities in the weatherability of the warped primary laminae within the concretions resulted in the formation of circular annuli that mimic Neoproterozoic discoidal structures, some of which have been contentiously interpreted as discoidal fossils. These findings emphasize the importance of thin-section petrographic observations in the study of discoidal dubiofossils in order to assess their origin as diagenetic concretions or as discoidal macrofossils.

scholarly journals Malgorzata Daszkiewicz, O. Munteanu, V. Iarmulschi, Pottery found at the Butuceni and Orheiul Vechi Iron Age settlements – results of archaeoceramological analysis

2019 ◽  
Vol 7 (2) ◽  
pp. 190-225
Keyword(s):  
Chemical Analysis ◽  
Thin Section ◽  
Iron Age ◽  
Raw Materials ◽  
Laboratory Analysis ◽  
Raw Material ◽  
Local Production ◽  
Know How ◽  
Pottery Technology ◽  
Two Factors

The aim of laboratory analysis carried out on pottery fragments recovered from the Poienești-Lucaşeuca (PL) site of Orheiul Vechi and the Getic site of Butuceni was to verify the hypothesis that there was a continuity in pottery technology traditions and the hypothesis that there was continuity in raw material use. In order to verify these hypotheses, i.e. to determine whether we are dealing with continuity or with changes in pottery manufacturing, two factors must be taken into account: know-how and raw material. This means that it is necessary to perform both technological and raw material analyses. For the purposes of this study the following methods were used: MGR-analysis, chemical analysis by WD-XRF, thin-section studies and an estimation of physical ceramic properties. The results of archaeometric analysis of pottery from the PL site of Orheiul Vechi and the Getic site of Butuceni did not substantiate the hypothesis that there had been a continuity in pottery technology traditions. The results of archaeometric analysis of pottery from the PL site of Orheiul Vechi and the Getic site of Butuceni did, conversely, confirm the hypothesis that there was a continuity in raw material use. At both sites and in both phases there is a marked emphasis on local production of ceramics using locally sourced raw materials.

THE USE OF SEMI-THIN SECTION METHOD IN THE STUDY OF STRESS-INDUCED STRUCTURAL CHANGES IN LUNGS

2018 ◽  
Vol 14 (64) ◽  
pp. 153
Author(s):  
M. M. Koptev ◽  
N. І. Vynnyk ◽  
O. V. Kokovska ◽  
B. M. Filenko ◽  
S. M. Bilash
Keyword(s):  
Thin Section ◽  
Structural Changes ◽  
Section Method

The Infection of Cells by Bullet-Shaped Viruses

1969 ◽  
Vol 27 ◽  
pp. 372-373
Author(s):  
Frederick A. Murphy ◽  
Alyne K. Harrison ◽  
Sylvia G. Whitfield
Keyword(s):  
Electron Microscopy ◽  
Physical Properties ◽  
Host Cell ◽  
Thin Section ◽  
Cultured Cells ◽  
Cell Infection ◽  
Thin Section Electron Microscopy ◽  
Section Electron ◽  
Section Electron Microscopy

The bullet-shaped viruses are currently classified together on the basis of similarities in virion morphology and physical properties. Biologically and ecologically the member viruses are extremely diverse. In searching for further bases for making comparisons of these agents, the nature of host cell infection, both in vivo and in cultured cells, has been explored by thin-section electron microscopy.

Deformation of Yeast Plasma Membrane by Ethidium Bromide

1988 ◽  
Vol 46 ◽  
pp. 254-255
Author(s):  
E. Keyhani
Keyword(s):  
Plasma Membrane ◽  
Thin Section ◽  
Ethidium Bromide ◽  
Freeze Fracture ◽  
Mutagenic Effect ◽  
Yeast Cells ◽  
Hydrophobic Region ◽  
Thin Section Electron Microscopy ◽  
Section Electron ◽  
Deep Pits

The mutagenic effect of ethidium bromide on the mitochondrial DNA is well established. Using thin section electron microscopy, it was shown that when yeast cells were grown in the presence of ethidium bromide, besides alterations in the mitochondria, the plasma membrane also showed alterations consisting of 75 to 110 nm-deep pits. Furthermore, ethidium bromide induced an increase in the length and number of endoplasmic reticulum and in the number of intracytoplasmic vesicles.Freeze-fracture, by splitting the hydrophobic region of the membrane, allows the visualization of the surface view of the membrane, and consequently, any alteration induced by ethidium bromide on the membrane can be better examined by this method than by the thin section method.Yeast cells, Candida utilis. were grown in the presence of 35 μM ethidium bromide. Cells were harvested and freeze-fractured according to the procedure previously described.

The Mechanomorphology of Microtubule Sliding

1980 ◽  
Vol 38 ◽  
pp. 604-607
Author(s):  
P. Satir ◽  
J. Wais-Steder ◽  
J. Avolio
Keyword(s):  
Thin Section ◽  
Dynein Arms

In 1977, Sale and Satir showed that active microtubule sliding in trypsin-treated Tetrahymena axonemes is always of a single polarity. If the doublet bearing active arms is labelled N, by convention, the doublet that is pushed by those arms is N+l. In active sliding in trypsin-treated axonemes doublet N+l is always displaced tipwards with respect to N. Several different configurations of the dynein arms have been described. These include: (1) an extended configuration, where the dynein arms are tilted about 40° towards the base of the axoneme and are long enough to span the space between doublets N and Ntl completely (2) a standard, unattached image, such as is usually seen in thin section. In this configuration, the arms do not span the interdoublet gap. (3) the rigor image, where the arms always bridge the gap. This differs from the extended configuration because tilt is often absent, so that the arms often lie normal to doublets N and N+l.

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