Poznámky k problematice interiéru nezděných staveb středověkého Brna (konfrontace archeologických poznatků a mikromorfologické analýzy podlahových úrovní vybraných staveb)

The study summarises the basic findings regarding non-masonry buildings in medieval Brno and the prospects for further knowledge. A modern methodological approach in the form of micromorphology in an archaeological context, particularly regarding the interiors of these buildings, was used to add more information. From more than 200 micromorphological samples taken in Brno since 2008, a total of 16 from five sites in the historical centre of the city were selected for this partial study. Temporally, this concerns the period between the early 13th and the mid-14th centuries. The basic outcome of the study is the analysis, interpretation and division of the samples into typological groups. Based on typical features, sunken parts of the structures used for a relatively long time could be divided from the above-ground structures even though in some cases the “floor sandwich” had been partly removed due to ongoing maintenance. Finally, the results were confronted with a macroscopic observation by an archaeologist and with ethnographic knowledge. It was possible to identify the more detailed microstratigraphy of the floor sandwiches than by macroscopic observations in most cases and therefore specify the interpretation of the origin of the floor sandwich.

Multi-Scale Analysis of Geotechnical and Physicochemical Changes in Loess Caused by Nano-SiO2 Pile Migration

Understanding property changes in soil improvement using a new technique is critical for enhancing engineering activity. However, little is known about nano-SiO2 pile-induced changes in soil properties due to its excellent properties as an alternative new additive material. This study aims to examine the changes in properties of loess stabilized with nano-SiO2 pile after curing for 28 days. Using samples taken from four desired radii (i.e., 5, 10 15, and 20 cm), we tested their mineralogical, structural, physicochemical, and index properties and analyzed the relationship of these properties to strengthen the link between microscopic characteristics and macroscopic behaviors. We then discussed the mechanism of the changes in the treated loess properties. The test results show that nano-SiO2 pile induced a physical structure modification in the treated loess and, consequently, an isotropic process with coarser particles due to crystallinity. This resulted in a solidification process in loess with nano-SiO2 pile, causing a decrease in water content and void ratio as well as an increase in natural density, thereby improving its mechanical strength. Meanwhile, the specific surface area (SSA)and cation exchange capacity (CEC) of treated loess were smaller than those of original loess, and there were slight changes in chemical properties. The disintegration rate of treated loess decrease compared with the original loess. The interactional relationship of the microscopic and macroscopic observation was facilitated to better understand the mechanism of changes in nano-SiO2 pile-treated loess properties. This finding reveals that nano-SiO2 pile has the potential as an alternative stabilized technique in loess improvement due to its obvious performance improvement and slight chemical changes.

Geochemical-Microscopical Characterization of the Deterioration of Stone Surfaces in the Cloister of Santa Maria in Vado (Ferrara, Italy)

Santa Maria in Vado is a monument in the rich artistic heritage of the city of Ferrara (north of Italy). In this paper we want to investigate the state of conservation of tombstones, cloister and the entrance to the basilica, in order to keep them in the best possible state for the future generations. From the chemical characterization, the state of conservation was determined focusing on the biodeteriogenic and non-biodeteriogenic factors, which determine a series of unwanted changes in the physical, mechanical and above all aesthetic properties of the material, often closely connected with the environment and conservation conditions. On the macroscopic observation, the state of conservation of the tombstones appeared to be very deteriorated through aesthetic and structural damage. In detail, the stereo microscope observation of samples collected from the tombstones show the presence of efflorescence probably caused by the abundant of water that bring the salts present inside the rock into solution. Relating the columns, μ-XRF analysis confirm the carbonate composition of samples and presence of iron and sulfur. Finally, SEM observation highlighted the presence of black crust on arch samples and the presence of pollen on the black crust and spheroidal particles probably related to atmospheric pollution.

Macroscopic detection of demyelinated lesions in mouse PNS with neutral red dye

Lysophosphatidylcholine (LPC)-induced demyelination is a versatile animal model that is frequently used to identify and examine molecular pathways of demyelination and remyelination in the central (CNS) and peripheral nervous system (PNS). However, identification of focally demyelinated lesion had been difficult and usually required tissue fixation, sectioning and histological analysis. Recently, a method for labeling and identification of demyelinated lesions in the CNS by intraperitoneal injection of neutral red (NR) dye was developed. However, it remained unknown whether NR can be used to label demyelinated lesions in PNS. In this study, we generated LPC-induced demyelination in sciatic nerve of mice, and demonstrated that the demyelinated lesions at the site of LPC injection were readily detectable at 7 days postlesion (dpl) by macroscopic observation of NR labeling. Moreover, NR staining gradually decreased from 7 to 21 dpl over the course of remyelination. Electron microscopy analysis of NR-labeled sciatic nerves at 7 dpl confirmed demyelination and myelin debris in lesions. Furthermore, fluorescence microscopy showed NR co-labeling with activated macrophages and Schwann cells in the PNS lesions. Together, NR labeling is a straightforward method that allows the macroscopic detection of demyelinated lesions in sciatic nerves after LPC injection.

Hydrogen Sulfide Stress Cracking in a Q345R Welded Joint

In this paper the failure reason of Q345R Welded Joint was studied through macroscopic observation, chemical properties, metallurgical analysis, scanning electron microscope (SEM) and EDS test method. The results showed that there were a large number of micro-cracks in the fracture surface. The reason of cracking is severe banded structure in base metal microstructure, which provided opportunity for hydrogen atoms to enter into the internal of steel when contact with wet hydrogen sulfide environment. The existence of tensile stress promotes the entry of hydrogen atoms and the propagation of cracks. The welding products of this procedure are not suitable for use under sour conditions.

Effects of ginsenoside Rb1 on second-degree burn wound healing and FGF-2/PDGF-BB/PDGFR-β pathway modulation

Background Panax notoginseng (Burk.) F. H. Chen (P. notoginseng) is a traditional Chinese medicine that has been used therapeutically for cardiovascular diseases, inflammatory diseases and traumatic injuries as well as for external and internal bleeding due to injury. Ginsenoside Rb1, a crucial monomeric active constituent extracted from P. notoginseng, has attracted widespread attention because of its potential anti-inflammatory, bacteriostatic, and cell growth-promoting effects. In this study, the therapeutic effects of ginsenoside Rb1 on second-degree burn in rats and the potential underlying mechanisms were explored. Methods A rat model of second-degree burn injury was established, and skin wound healing was monitored at different time points after ginsenoside Rb1 treatment. HE staining was performed to identify burn severity, and biological tissues were biopsied on days 0, 7, 14, and 24 after treatment. Skin wound healing at different time points was monitored by macroscopic observation. Furthermore, IHC, WB, and RT-PCR were utilized to determine the protein and mRNA expression levels of PDGF-BB, PDGFR-β, and FGF-2 in wound tissues after treatment. Results HE staining showed that after 24 days of ginsenoside Rb1 treatment, skin tissue morphology was significant improved. Macroscopic observation demonstrated that in ginsenoside Rb1-treated rats, the scab removal time and fur growth time were decreased, and the wound healing rate was increased. Collectively, the results of IHC, WB and RT-PCR showed that PDGF-BB, PDGFR-β, and FGF-2 expressions peaked earlier in ginsenoside Rb1-treated rats than in model rats, consistent with the macroscopic observations. Conclusion Collectively, these findings indicated that ginsenoside Rb1 promotes burn wound healing via a mechanism possibly associated with upregulation of FGF-2/PDGF-BB/PDGFR-β gene and protein expressions.

UJI INVIVO EKSTRAK UMBI BAWANG HUTAN (Eleutherine americana Merr.) TERHADAP GAMBARAN MAKROSKOPIS ORGAN JANTUNG TIKUS PUTIH JANTAN GALUR WISTAR (Rattus norvegicus)

ABSTRACTForest onion bulbs (Eleutherine americana Merr.), Including the Iridaceae family, have been used for generations by the Dayak people as medicinal plants for various types of diseases such as breast and colon cancer, hypertension, diabetes mellitus, hypercholesterolemia and stroke. This study was conducted to evaluate the effect and side effects of extracts of forest onion bulbs to the macroscopic description of cardiac organ in rats. Thirty male white rats Wistar strain was used as research object, which is divided into three groups of dose that applied with the ethanol extract of Forest onion bulbs orally (5mg/ml, 10mg/ml, 15mg/ml) and one group as controls for comparison. The tests were carried out for 15 days, with observations made against the body weight of rats, macroscopic observation of cardiac organ and observation of cardiac organ weights. The results showed that the provision of forest onion bulbs extract did not cause significant changes based on the graph of observations made on the macroscopic image of the heart organ and the weight of the rats. Keywords : Forest onion bulbs (Eleutherine Americana Merr.), cardiac macroscopic, white rat (Rattus norvegicus) ABSTRAKUmbi bawang hutan (Eleutherine americana Merr.) termasuk familia Iridaceae, secara turun temurun telah dipergunakan oleh masyarakat dayak sebagai tumbuhan obat untuk berbagai jenis penyakit seperti kanker payudara dan kolon, hipertensi, diabetes mellitus, hiperkolesterol dan strok. Penelitian ini bertujuan untuk melihat pengaruh yang ditimbulkan dari konsumsi ekstrak Umbi bawang hutan terhadap gambaran makroskopis organ jantung pada tikus putih. Penelitian dilakukan menggunakan hewan percobaan tikus putih jantan galur wistar berjumlah 30 ekor, yang dibagi dalam empat kelompok dosis yang diberi ekstrak etanol umbi bawang hutan secara oral yaitu (5mg/ml, 10mg/ml, 15mg/ml) dan satu kelompok kontrol sebagai pembanding. Masa pengujian dilakukan selama 15 hari, dengan pengamatan yang dilakukan berupa pengamatan berat badan tikus, pengamatan makroskopis organ jantung dan pengamatan berat organ. Hasil penelitian menunjukkan bahwa pemberian ektrak umbi bawang hutan tidak menimbulkan perubahan yang signifikan berdasarkan grafik pengamatan yang dilakukan pada gambaran makroskopis organ jantung serta penimbangan berat badan tikus. Kata kunci : Umbi bawang hutan (Eleutherine americana Merr.), makroskopis jantung, tikus putih (Rattus norvegicus)

Gambaran Makroskopis Persembuhan Luka Mukosa Buccal Tikus Putih (Rattus norvegicus) Pascapemberian Policresulen

This study aimed to investigate the effect of policresulen treatment with various concentrations on the wound healing in buccal mucosa of white rats (Rattus norvegicus) through macroscopically observation. The number of 54 rats were divided into six treatment groups policresulen with concentration of 36%, 10%, 5%, 1%, 0.3% and one control group. The buccal mucosal injury was made with a 0.5 cm biopsy punch. The treatment of mucosal injury was conducted by dropped policresulen on the 2nd day until the 5th day after the injury. Macroscopic observation under a stereo micro-scope was conducted on the wound diameter, redness, swelling, and necrose. The results showed that wound healing was influenced significantly with concentration of the policresulen. The best healing was shown on lowest concentration marked which has lowest size of the wound diameter (0.50 ± 0.00 cm), the lowest tissue redness (0.00 ± 0.00), lowest final swelling at a concentration of 0.3%. Clinical evaluation of wound tissue necrose parameters which were seen to be most severe at 10% policresulen administration followed by 36% concentration and the least necrose shown on policresulen administration 0.3%. Therefore, based on macroscopic images with parameters of wound diameter, redness, swelling, and necrose suggested that policresulen used for wound healing process are at a concentration of 0.3%.

Title: Multi-Scale LM/EM Neuronal Imaging from Brain to Synapse with a Tissue Clearing Method, ScaleSF

The mammalian brain is organized over sizes that span several orders of magnitude, from synapses to the entire brain. Thus, a technique to visualize neural circuits across multiple spatial scales (multi-scale neuronal imaging) is vital for deciphering brain-wide connectivity. Here, we developed this technique by coupling successive light microscope/electron microscope (LM/EM) imaging with an ultrastructurally-preserved tissue clearing method, ScaleSF. Our multi-scale neuronal imaging incorporates 1) brain-wide macroscopic observation, 2) mesoscopic circuit mapping, 3) microscopic subcellular imaging, and 4) EM imaging of nanoscopic structures, allowing seamless integration of structural information from the brain to synapses. We applied the technique to three neural circuits of two different species, mouse striatofugal, mouse callosal, and marmoset corticostriatal projection systems, and succeeded in the simultaneous interrogation of their circuit structure and synaptic connectivity in a targeted way. Our multi-scale neuronal imaging will significantly advance the understanding of brain-wide connectivity by expanding the scales of objects.

Microscopic Characterization of Fusarium sp. Associated with Yellow Disease of Pepper (Piper nigrum L.) in South Bangka Regency

Pepper production has decreased recently, especially due to yellow diseases of Fusarium sp. Thus, this research aimed to isolate and characterize Fusarium sp. from soil and root of healthy and diseased pepper plants. The sampling technique used was purposive sampling. Soil and root pepper samples were taken from lands in Payung and Ranggung Village, Payung District, South Bangka Regency. There were 3 varieties of pepper plant used, including Petaling 1, Nyelungkup, and Merapin Daun Kecil. The characterization of Fusarium sp. isolate included macroscopic and microscopic observation. Macroscopic observation included colony color, colony base color, and growth rate/colony diameter size (cm), while microscopic observation included hyphae structure, and the shape and size of microconidia, macroconidia, chlamydospore, and conidiophore. The research found 66 isolates of Fusarium genus based on the colony color. Most of the isolates were white or purple and red. Colony color of Fusarium sp. showed white color, which then turned to orange color. All isolates showed septate hyphae. Isolates with macroconidia 3-4 septate and micronidia 0-1 septate showed the character of Fusarium oxysporum, while isolates with macroconidia 3-5 septate and microconidia 0-2 septate showed the character of Fusarium solani.