White Glass Research Articles

A New Method for Lateral Visualization of the Primary Cilia on the Surfaces of Cells Cultured on White Glass Rods

A New Method for Lateral Visualization of the Primary Cilia on the Surfaces of Cells Cultured on White Glass Rods

A comparative study on the optical performance of retro-reflective coatings before and after the aging process

Retro-reflective (RR) materials are largely included among the strategies to mitigate Urban Heat Island (UHI) phenomenon in the urban spaces thanks to their optical directional properties. As materials potentially used in the building exterior envelope, RR materials are subjected to outdoor aging and soiling processes, which could alter their optical behaviour. In this perspective, the investigation focuses on the characterization of the optical performance of several types of RR plaster coatings after outdoor aging and soiling processes. The RR plaster coatings were previously developed and studied, before undergoing the outdoor exposure. The RR samples were developed covering the support with a reflective white paint and glass beads. Five different microsphere diameter ranges and three different microsphere superficial density ranges have been employed. In this paper, the RR plaster coatings were tested in terms of optical properties after outdoor aging and soiling and results were compared with data of the same plaster coatings pre-aging. Generally, all RR aged samples show a lower solar reflectance in the Vis region with respect to the pre-aging conditions. The RR behaviour is qualitatively maintained after aging and soiling. The RR sample made of glass beads of 200–300 μm diameter range could represent the best solution both in pre- and post-conditions and both in terms of solar reflectance and retro-reflective behaviour, regardless of the density of microspheres used.

A multi-technique approach to unveil the composition and fabrication of a pre-Roman glass masterpiece: a double-faced human-head shape polychrome glass pendant (2nd -1st c. BC)

Pre-Roman glass craftsmanship reached its summit with the development of complex polychrome glass beads, being the Phoenician glass pendants the most exquisite and elaborate example. The uniqueness and complexity of such findings could reveal key information for the understanding of the production and trade of glass pieces at that age. However, these findings have practically never been studied from a physic-chemical perspective. In this work, a remarkable polychrome glass pendant (2nd -1st c. BC) found at the archaeological site of Pintia (Padilla de Duero, Valladolid, Spain) is studied by a multi-analytical non-destructive approach, employing X-ray tomography to understand its fabrication procedure, as well as X-ray fluorescence (XRF) and Raman spectroscopy, both employed in microscopic mode, to determine the composition of each glass employed in its fabrication. The outstanding preservation state and well-defined archaeological context of this glass pendant offered a unique opportunity to expand the understanding of pre-Roman glass pieces, while the combination of the experimental techniques employed provided the first complete and detailed study of a Phoenician glass pendant. The fabrication procedure of the pendant has been identified step-by-step, showing evidence of the use of pre-made pieces for the eyes, as well as hints of its fabrication in a secondary workshop. Moreover, the microchemical analysis of the vividly colored glasses by XRF and Raman spectroscopy revealed a composition compatible with the use of natron as fluxing agent, typical of Phoenician glass, the presence of surface alterations corresponding to carbonatation processes, as well as the nature of the employed chromophores or pigments: Mn, Cu, and Co for the blue, Fe-S for the black, CaSb2O7 and CaSb2O7 + TiO2 for two diverse white glasses, and a pyrochloric triple oxide (Pb2Sb2 − xSnxO7−x/2) and lead oxides for the yellow. Remarkably, the use of pyrochloric triple oxides as yellow pigments has scarcely been previously reported at that age. Finally, the identification by Raman spectroscopy of CaSb2O7 and the β-phase of CaSiO3, as well as the Raman spectra features of the glass matrix corresponding to the blue glass, indicated maximum firing temperatures below 1100 °C.

Influence of drinking cups of different materials on emotional and acceptance responses, and perception of sensory attributes of soft drinks

The aim of this study was to investigate whether drinking cups made of different materials (white polystyrene, crystal-clear polystyrene, paper, Styrofoam, and glass) can influence the response to soft drinks in terms of emotions, acceptance and perception in younger adult consumers. Experiments were conducted with three different groups of university students who (1) participated in the survey on expectations of disposable cups, (2) performed sensory tests on emotional and hedonic responses and (3) evaluated selected sensory characteristics of soft drinks served in the test cups. The characteristics of the cups influenced the overall acceptability of the soft drink, while the flavor acceptability and the perception of flavor intensity were not affected. Compared to the heavier cups, the soft drink served in lighter cups was perceived as more viscous. The soft drink was rated most acceptable when consumed from the glass and least acceptable when tasted from the Styrofoam. The Styrofoam, paper and white polystyrene had an impact on reducing the overall acceptability of the soft drink. The emotional map identified in the study for the consumption of soft drinks from different cups could be related to the sensory characteristics of the cups. Glass can be considered a more acceptable vessel for soft drink consumption compared to disposable cups, while crystal–clear polystyrene is more acceptable than paper, Styrofoam and white/opaque polystyrene. When selecting materials for disposable cups, preference should be given to materials that have similar properties to glass, such ashigher weight, low flexibility, low surface graininess and high translucency.

A new deep-sea species of Halirages Boeck, 1871 (Crustacea: Amphipoda: Calliopiidae) inhabiting sponges

In the vast abyssal plains northwest of Iceland, white glass sponges of the genus Caulophacus Schulze, 1886 were inhabited by reddish Bythocaris G.O. Sars, 1870 shrimps and pinkish amphipods. After in situ observations at 3700 m depth, in -1°C waters by a remotely operated vehicle, members of this assemblage were collected and preserved for molecular studies. Based on integrative taxonomic analyses, the amphipods were identified as a new species of the genus Halirages Boeck, 1871 – Halirages spongiae sp. nov. Lörz, Nack & Tandberg –, as described in detail below. Part of our integrative approach was to establish reference DNA barcodes for known species of Halirages. However, our investigation of material of Calliopiidae G.O. Sars, 1895 collected around Iceland and Norway revealed slight morphological discrepancies in all the described species of Halirages. Except for Halirages fulvocinctus (M. Sars, 1858), none of the encountered specimens of Calliopiidae fully matched a current species description. We illuminate the morphological characteristics of nine operational taxonomic units, which also represented clades in COI and 28S. We set the Icelandic samples in the context of Halirages from Canada and Norway. A key to the world species of Halirages is provided.

More than you see: lack of diversity in Brazilian creative departments

ABSTRACT This study explores the experiences of Black and White women creatives working in advertising agencies in São Paulo, Brazil. In total, 28 in-depth interviews were conducted, and data was analysed through the lens of intersectionality theory. Six themes emerged: 1) White men rule the department, 2) the power of white privilege, 3) breaking the (white) glass ceiling, 4) tokenism at work, 5) segregated accounts and 6) stereotypes: From gender to race. White men were found to reign over Brazilian advertising agencies. While women were underrepresented as a whole, differences were found between the experiences of Black and White women working in these agencies. Specifically, Black women faced a unique set of challenges relative to White women, including but not limited to racism, sexism, stereotypes, and even roadblocks to their career advancement put in place by individuals of their own gender. Limitations and directions for future research are outlined.

Research on Intelligent Optimisation Strategies for Interior Space Layout Design with the Aid of 3DsMax+AI

Abstract Indoor intelligent assistive technology has been widely used in space layout design optimization. This paper proposes a heuristic scene space layout generation method based on the smart evolution of scene space AI with WFC and deep network, joint wave function collapse algorithm, as well as two deep neural networks to generate the layout wireframe diagram while strangling reasonable boundaries and predicting functional semantic labels for the layout subspace. Applying the method of this paper to the office space layout optimization design, the results show that 95.68% of the area of the office and conference room has a lighting coefficient greater than 2%, and 85.78% of the area of the design room has a lighting coefficient greater than 3%. Ordinary white glass can be utilized in the design room to enhance the lighting quality, with a lighting coefficient of 2.87 and a compliance rate of 100%. The inset atrium space has a greater percentage of indoor thermal comfort area and a faster air flow rate. In this paper, 3DsMax+AI intelligent assistance and other technologies are used to simulate the layout design of the office space and realize the optimization of its layout design.

Composition of Diverse Glass Material from the Cathedral of the Assumption of the Blessed Virgin Mary, Dubrovnik, Croatia

The article presents the first archaeometric investigation of the typologically and chronologically diverse assemblage of medieval and post-medieval glass from the Cathedral of the Assumption of the Blessed Virgin Mary in Dubrovnik, Croatia. Sixty samples, comprised of various vessels, lamps, beads, and window glass (oculi), and dated between the 12th and 18th century, were analysed with simultaneous PIGE-PIXE methods. The results show that most items were made with the ash of halophytic plants harvested in the Levant, but these can be divided into several compositional subtypes, among which white and common glass are the most numerous. Most glasses can be attributed to the north Italian or Levantine workshops; however, a few analysed samples are of the mixed-alkali type, façon de Venise, and Mesopotamian Type I glass. Furthermore, a few distinct samples were made with purer soda sources. The findings corroborate Dubrovnik’s strong cultural and economic links with the Venetian glassmaking tradition and underline the influence and preference of the Mediterranean seafaring trade routes over the continental European ones; an unsurprising fact, considering the status of the Dubrovnik Republic as a stronghold of maritime trade in the period.

Application of the Conjugate Gradient Method for Predicting Unknown Heat Flux in 2D Plat under Effect of Insulation

When an anomaly is discovered during a thermal inspection of industrial equipment, the diagnosis of finding the heat source is made more difficult by the presence of heat insulation. The use of the Conjugate Gradient Method (CGM) to solve the unknown heat flux in Inverse Heat Conduction Problem (IHCP) under insulation condition has been discussed. This method is used to predict a heat flux by utilizing temperature data at any points of measurement. The study deals with the structure of 2D thin plate at steady state. A copper plate with a thickness of 1 mm is used as specimen. White glass wool is used to thermally insulate the plate on the back surface. An electrical heater is plate mounted and operated by varying the DC voltage. A datalogger with thermocouple sensors records plate temperature changes. Software for solving the IHCP based on the CGM was developed. Initially, the software was implemented using synthetic data obtained from the forward heat conduction equations with a known heat flux. Simulated measurement data are assumed to have high accuracy (± 0.1 ºC). Determination of heat flux with the CGM gives very satisfactory results with a low error below 0.12%. The CGM was then applied using experimental data. With a measurement error of ± 0.5 ºC, the computational stopping criterion can still be met satisfactorily. In real installations, equipment is sometimes partially or completely isolated. In the experiment, this phenomenon is simulated by varying the isolation area as follows: 0%, 25%, 50% and 100%. The results of the flux calculation are correlated with the real flux supplied by the electrical heater. Each type of insulation area has a similar curve. By obtaining the correlation equation, the equivalent heat flux from calculation to real and vice versa can be carried out.

Dendrimer-Encapsulated Halide Perovskite Nanocrystals for Self-Powered White Light-Emitting Glass.

Perovskite nanocrystals (PNCs) have attracted substantial attention due to their inspiring intrinsic merits such as low cost, high performance, and solution processability, but when it comes to the usage of blends of different colored PNCs with the purpose of covering the broadband spectrum field, the high degree of instability remains a major bottleneck. Herein, we report a family of dendritic ammonium ligands that act as stiff shell-encapsulating PNCs for improving their stability and suppressing ion permeability in mixed colloidal PNC solutions. The as-synthesized ligand-encapsulated PNCs notably achieve near-unity photoluminescence quantum yields (PLQYs) and strongly resist the unwanted ion exchange reaction under aggressive anion source attack. To fabricate self-powered white-emitting glass, the stabilized mixed colored PNCs were embedded into the laminated glass, which simultaneously acted as absorbers-emitters for luminescent solar concentrators (LSCs) and emitters for white light-emitting glass.

White scheelite-zircon glass ceramic enamels: Clues for their optimization as cool surfaces

White scheelite-zircon glass ceramic enamels: Clues for their optimization as cool surfaces

Fragments of luxury: Opaque glass from the Palace of Mystras, Greece

The present study focuses on the analysis of nine opaque or translucent glass samples of white, grey/blue and red colour, recovered from the Palace Complex of Mystras in southern Peloponnese, Greece. Their date cannot be determined with specificity but has to span between the mid-13th and mid-19th c. AD, the period since the construction of the site and throughout its continuous use as the administrative centre of the Despotate of Mystras. The extremely rare occurrence of opaque glass vessels of this period in Greece, as well as the recovery of most samples within Building E of the Complex, suggest that the samples were precious objects, possibly owned by high ranking members of the Palace. A multi-technique approach, including Optical microscopy, SEM/EDS, Raman spectroscopy and TEM analysis, was implemented in order to determine the microstructure and raw materials of the samples.Despite the small number of samples, a remarkable variability was revealed in terms of the raw materials and manufacturing processes employed. Overall, three different opacification techniques were documented among the white and grey/blue samples: The Na-rich glasses were opacified using either cassiterite, a typical opacifier for the period, or calcium antimonate, a less common opacifier in the post-Medieval glassmaking. The K-rich white glasses were opacified with the addition of the ashes of animal bones, as suggested by the presence of calcium phosphates, a Byzantine tradition that was possibly also used by Bohemian glassmakers.Finally, the red glasses present certain atypical traits in their microstructure and chemical composition. The samples contain multiple calcite, tin oxide and lead oxide particles. The colour is due to copper, which could only be identified with the application of TEM analysis, in the form of copper oxide nanoparticles.The present study highlights the complicated traditions employed for the production of opaque glass in the post-Medieval European workshops and it underscores the need for a more thorough study of related material.

A Novel Mechanically Robust and Biodegradable Egg White Hydrogel Membrane by Combined Unidirectional Nanopore Dehydration and Annealing.

A homogeneous egg white obtained by high-speed shearing and centrifugation was dehydrated into a fragile and water-soluble egg white glass (EWG) by unidirectional nanopore dehydration (UND). After EWG annealing, it can become an egg white hydrogel membrane (EWHM) that is water-insoluble, flexible, biocompatible, and mechanically robust. Its tensile strength, elongation at break, and the swelling ratio are about 5.84 MPa, 50-110%, and 60-130%, respectively. Protein structure analysis showed that UND caused the rearrangement of the protein molecules to form EWG with random coil and α-helix structures. The thermal decomposition temperature of the EWG was 309.25 °C. After EWG annealing at over 100 or 110 °C for 1.0 h or 45 min, the porous network EWHM was mainly composed of β-sheet structures, and the thermal decomposition temperature increased to 317.25-318.43 °C. Their 12-day residues in five proteases ranged from 1% to 99%, and the order was pepsin > neutral protease > papain > trypsin > alkaline protease. Mouse fibroblast L929 cells can adhere, grow, and proliferate well on these EWHMs. Therefore, the combined technology of UND and annealing for green and novel processing of EWHM has potential applications in the field of biomimetic and biomedical materials.

B2O3-ZnO-SiO2 low-melting glass and its application in high reflective white glass ink

Glass of B2O3-ZnO-SiO2 (BZS) is used for the first time to prepare high reflective white glass ink for photovoltaic glass backplanes. White glass inks with specific compositions have successfully produced. The effects of B2O3/ZnO (B/Zn) ratio and B2O3/SiO2 (B/Si) ratio on the properties of low-melting glass (LMG) and white glass ink were studied. It is found that [SiO4] and [ZnO4] structures can improve the reflectivity of glass ink, while [BO3] structures can reduce the reflectivity of glass ink. Furthermore, the effect of the surface morphology of the glass inks heat-treated on the glass brightness is investigated by varying the sample heat-treated temperature. Our research and findings have provided an important reference point for future development of high reflective and low-cost white glass inks for photovoltaic glass backplanes.

Solar Light Radiometry Calibration Unit for a ScanPol Polarimeter of the Aerosol-UA Space Mission

The Aerosol-UA space mission will study aerosol microphysical characteristics in the Earth’s atmosphere based on the multispectral scanning polarimeter (ScanPol) and imaging polarimeter (MSIP). Both polarimeters must be precisely calibrated on the ground and in orbit to provide correct measurements. This paper considers the results of developing an experimental device for the radiometric calibration of the ScanPol. We consider the calibration unit design and operation principle to form a luminous flux with unchanged or well-predicted characteristics in a specified direction. The construction of the radiometric calibration unit is based on a sun-illuminated reflective diffuser made from the white opal glass MS20. We evaluated the scattering and polarization characteristics of the diffuser in laboratory experiments at a wide range of wavelengths. The results suggest that the polarization properties of the diffuser are negligible. The diffuser scattering parameters are close to Lambertian for illuminance conditions, which is necessary for radiometric calibration. The calibration unit was manufactured and tested during field observations of solar radiation. The results will be used for its improvement, mainly to reduce the observed stray scattered radiation entering the telescopes of the ScanPol polarization state analyzer.

Durability analysis of partial replacement of ordinary Portland cement by white glass waste concrete

Concrete consists of cement, water, fine aggregate, coarse aggregate, and air. The cement manufacturing process is responsible for a large carbon dioxide emission. Therefore, several research have been conducted to find advantageous substitute materials, even if only partially. Waste glass emerges as an alternative because it is a non-biodegradable inert material, with a high recycling rate and low cost. Several studies on recycled glass as a partial substitute for cement in concrete have already been conducted in terms of workability, strength, and properties, but few have reviewed the durability properties of concrete incorporating glass waste. It is a fact that durability is of great importance for the performance of concrete, because compromising it can lead to the emergence of pathologies. This article aims to carry out a study on the durability of concrete with the replacement of cement by glass waste, to verify its performance in relation to conventional concrete, identifying the advantages that attest to its use in civil construction as an alternative to concrete to be used in buildings, whether in new constructions or in the process of rehabilitation or maintenance.

Thermal reduction-triggered full-color tuning of Eu3+/Eu2+/Tb3+ co-doped sintered nanoporous Al2O3-SiO2 glass for WLEDs

The development of advanced luminescent materials is highly desirable for developing the energy-efficient lighting technology. However, it is still challenging to achieve stable full-color tuning in the same matrix upon a single-beam light excitation so as to ensure the high color stability and consistency. Herein, Eu3+/Eu2+/Tb3+ co-doped sintered nanoporous glass via the dipping strategy is fabricated, which can emit blue, green and red emissions simultaneously by simply modifying the thermal treatment temperature. This full-color tuning is attributed to the dual roles of the thermal reduction of Eu3+ to Eu2+ in Al2O3-SiO2 glass and simultaneous emissions of Eu3+/Eu2+/Tb3+ activators. The densification of nanoporous glass via sintering could effectively decrease the amount of hydroxyl groups that present in the glass matrix, resulting in 5 times enhancement of the photoluminescence intensity and longer photoluminescence lifetime of rare earth (RE) ions. The thermal reduction of Eu3+ to Eu2+ is due to the reduction environment provided by Al3+ ions in the Al2O3-SiO2 glass. The energy transfer (ET) from Eu2+ to Tb3+, Eu2+ to Eu3+ and Tb3+ to Eu3+ have been investigated in detail. Based on the ET mechanism, rational PL spectra design was demonstrated by varying the concentration of Eu3+ ions in solution. The Color Correlated Temperature (CCT) and the Color Rendered Index (CRI) values of the white light emission glass are 7420 K (Cold-white emission) and 80.85, the temperature dependent photoluminescence (TDPL) analysis reflects the white light emission glass possesses high thermal stability and excellent thermal restorability. This facile fabrication and full-color tuning of Eu3+/Eu2+/Tb3+ co-doped sintered nanoporous Al2O3-SiO2 glass may provide a novel luminescent material for white-light emitting diodes (WLEDs) application.

Experimental Identification of Alkali-Aggregate Reaction in Concrete

Several advanced and time-consuming methodologies have been developed to detect Alkali-Silica Reaction (ASR) in suspected structures. The main objective of this research study was to identify a reliable experimental procedure for detecting ASR in existing concrete. A simple staining solution is used here to detect ASR in concrete specimens. The staining reagent employed here is Sodium Cobaltinitrite, which is used in the Los Alamos staining method to detect ASR. Sodium Cobaltinitrite can identify potassium-rich ASR gel by staining it yellow for rapid field screening purposes. Reactive and control concrete specimens were cast to get some experience with this test and to verify whether this test can be used in a suspected concrete structure. Waste white soda-lime glass aggregate was used to cast reactive concrete specimens, whereas natural coarse aggregates were used to cast non-reactive concrete specimens. Testing was carried out in two batches. Each batch consisted of six reactive and six control concrete specimens which were cured in the above-mentioned solutions. The first batch was examined after 44-days and the second batch was tested after 60-days of casting. Results of this test showed that reactive concrete specimens cast using glass displayed yellow stains as expected, demonstrating the presence of potassium-rich ASR gel on the concrete surface. Employing NaOH as a curing medium had accelerated ASR. There is a limitation in the method when utilizing KOH as a curing agent. It is concluded that Sodium Cobaltinitrite can be used as a method for rapid identification of ASR in the preliminary stages of experimental identification of the alkali-aggregate reaction in an existing concrete structure. KEYWORDS: Alkali-Silica Reaction, Sodium Cobaltinitrite, Aggregates, Waste glass, Cement, Potassium hydroxide, Sodium hydroxide

Nanodiamond-promoted white light emission in Eu, Dy, and Cu-containing phosphate glass: quantitative analysis and colorimetric study.

A thorough analysis of glass containing Eu2 O3 and Dy2 O3 , or Eu2 O3 , Dy2 O3 , and CuO melted together with nanodiamond powder was pursued based on measurements of optical absorption, photoluminescence (PL) emission and excitation spectra, and colorimetry. Nanodiamond facilitated the stabilization of Cu+ and Eu2+ ions with blue-emitting characteristics that, along with yellow-emitting Dy3+ and red-emitting Eu3+ led to the white light-emitting glass. Novel intensity notations implemented in intensity-based spectral ratios, and difference intensity correlation analysis were proposed for the assessment of PL properties. The chromaticity and correlated colour temperature of the emission were ultimately investigated as a two-parametric problem based on: (1) the different ionic components; and (2) the various excitation wavelengths employed. The optical analysis approach adds to the characterization methods to further fundamental understanding and provide helpful analytical tools for designing materials for tunable white light-emitting devices.

Akulturasi Budaya Pada Tradisi Buang-Buang di Desa Tempapan Kuala Kabupaten Sambas, Kalimantan Barat

The area of West Kalimantan, Sambas Regency, still carries out ancestral rituals that have been acculturated to Islamic culture, namely the ritual of wasting. The purpose of this research is to find out the acculturation process of Islam and local culture in the wasting tradition in the people of Tempapan Kuala Village and to find out the forms of acculturation of Islam in the wasting tradition. The methods used in this study are as follows; Heuristics, Verification, Interpretation and Historiography. The results of the research show that: The Wasting Tradition aims to keep people away from the dangers sent down by God for the sins that have been committed by humans. The dangers are in the form of prolonged heat, failure of agricultural businesses, and the spread of disease outbreaks. The form of Islamic acculturation in the local culture in the tradition of wasting is in the form of Sirih kapur, at least three sheets with the same fins, complete with gambier or some peeled betel nuts, gental cigarettes, namely nipa leaf cigarettes with a charm and spells. Frankincense and incense (censer). Pendupa means a place for incense in the form of a flat made of pottery or copper with coals made of wood. Yellow sticky rice with one raw chicken egg served in a flat white glass plate. A knife or a piece of iron or a nail, as hardener.