Miracle-dz/UniFAR-FTUs huggingface dataset:
Crystallographic snapshots of host‒guest interactions in drugs@metal‒organic frameworks: towards mimicking molecular recognition processes

We report a novel metal–organic framework (MOF) featuring functional pores decorated with hydroxyl groups derived from the natural amino acid L-serine, which is able to establish specific interactions of different natures, strengths and directionalities with organic molecules of technological interest, i.e. ascorbic acid, pyridoxine, bupropion and 17-β-estradiol, based on their different sizes and chemical natures. The ability of 1 to distinctly organize guest molecules within its channels, through the concomitant effect of different directing supramolecular host–guest interactions, enables gaining unique insights, by means of single-crystal X-ray crystallography, into the host–guest interactions. These results increase our understanding of molecular recognition processes in MOFs, opening a myriad of potential technological applications in the near future.
Understanding the effect of chlorobenzene and isopropanol anti-solvent treatments on the recombination and interfacial charge accumulation in efficient planar perovskite solar cells

Organic–inorganic lead halide perovskites have emerged as very promising semiconductors with efficiencies exceeding 22% making them a serious candidate for next generation solar cells. All current high performance perovskite solar cells (PSCs), including the most recent world records, were achieved using the so-called anti-solvent method. Here, an anti-solvent, typically chlorobenzene (CB), is used to induce rapid crystallisation of a liquid perovskite precursor resulting in highly homogenous, pinhole-free planar perovskite films. While this has yielded very impressive high-performance results, few efforts have been dedicated to the fundamental understanding of the anti-solvent method. In this work, a systematic study is employed to understand the influence of anti-solvent treatment on both morphological and optoelectronic characteristics of PSCs. Perovskite absorber films were treated using CB and isopropanol (IPA) for comparing anti-solvents with different polarities. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) show that IPA treated perovskite films have a more uniform morphology with larger grains in comparison to CB processed perovskite films. Despite the improved morphology and solar cell performance the devices with IPA treated perovskites suffer from higher hysteresis during current density–voltage (J–V) scans. We found that this enhanced hysteresis stems mainly from higher charge accumulation at the TiO2/perovskite interface under illumination that could also lead to formation of excess electrostatic potential contributing to an increased open circuit voltage (Voc). Our study provides a way for in-depth spectroscopic analysis methods aiding a deeper understanding of the interfacial charge characteristics and the fundamental mechanisms of PSCs.
Chemical characterization, energy and zinc bio-availability of cassava starch residues fermented with rumen liquor and different n-sources

The nutritive potentials of rumen liquor fermented cassava starch residue (RLFCSR) were evaluated with a view to providing basic analytical data which will enhance its use in animal feed. The crude protein (CP) of cassava starch residue increased from 35.62 – 79.4 g/kg, while the crude fibre (CF) decreased from 125.18 – 83.87 g/kg as the levels of N-sources increased from 0 g/kg to 50 – 100g /kg. Increased fermentation period (FP) from 0 hour to 72 – 144 hours led to 21.1 – 21.3 % increment in CP and 8.2 – 9.5 % decrease in CF in RLFCSR. The energy contribution due to fat (PEF) and protein (PEP) increased with N-sources and FP but energy contribution due to carbohydrate (PEC) and utilizable energy due to protein (UEDP) decreased. The molar ratios of K/Na, Na/K, Ca/P and Ca/Mg were affected by N-sources, levels of N-sources and FP. HCN and phytate consistently decreased as the levels of N-sources and FP increased. The levels of Phy:Zn, Ca:Phy and Ca:Phy/Zn were good enough to enhance Ca and Zn bioavailability.
Scaling Wet Fine Grinding Processes of Organic Particles Using Stirred Media Mills

This study presents an approach to scale up wet fine grinding processes of organic particles using stirred media mills. The process transfer is based on the calculation of grinding-relevant energy, which is transferred to the product by a model theory derived from mill-related values, especially geometric aspects. Its application was demonstrated by experimental work with two organic products, which were ground with different sizes and geometries of mills reaching from 20 to 900 mL grinding chamber volume under variation of process parameters.
Biodegradable and Flexible Resistive Memory for Transient Electronics

Physically transient electronics have attracted increasing attention recently due to their potential as the basis for building “green” electronics and biomedical devices. In the development of transient devices for biomedical applications, however, the dilemma between the strictly required biodegradability and device performance has brought great difficulties to the material selection. In this paper, we introduced silk fibroin as dielectric layer to fabricate biodegradable resistive memory devices. Comprising a W/silk fibroin/Mg sandwich structure, stable bipolar resistive switching behavior with good repeatability and device variability was obtained, surpassing most organic resistive memory and comparable to inorganic resistive memory. The carrier-transport evolution process was carefully examined to reveal the mechanism behind resistive switching. A switching model regarding the formation of metallic conductive filament was proposed by considering both the nature of silk fibroin dielectric layer and the.
A Review of Groundwater Pollution Potential Threats from Municipal Solid Waste Landfill Sites: Assessing the Impact on Human Health

An attempt has been made in this paper to review various studies associated with groundwater contamination near landfill sites, basically caused by non-engineered landfills or open dumps in India and overseas, and its impact on human health. Landfill leachate contains different kinds of municipal toxic wastes as well as heavy metal, which finally percolates into the ground and joins the groundwater table. Consuming such water results in severe health hazards and may sometimes be fatal if consumed for long periods. Several studies have shown evidence on the high concentration of heavy metals in leachate as well as in nearby groundwater sources. Moreover, various studies have confirmed the fact that there is an increased threat of adverse health effects (low birth weight, birth defects, and certain types of cancers), congenital malformations in children, and higher risks for malformations of the nervous and musculoskeletal systems for skin, hair, and nails in local residents. Pregnant women and children are more vulnerable to these pollutants, and newborn children are more prone to the health risk. These findings may signify the real health risks associated with residents residing near landfill sites.
Carbon Chemistry in the Mainstream of Kuroshio Current in Eastern Taiwan and Its Transport of Carbon into the East China Sea Shelf

Comprehensive carbon chemistry data were measured from the mainstream of Kuroshio, off eastern Taiwan, in May 2014. Results indicated that variations of pH@25 °C, POC, ΩCa, DIC, pCO2 and RF were closely related to the characteristics of various water types. Phytoplankton photosynthesis played important roles in DIC variation in Kuroshio Surface Water (KSW), whereas the DIC variation in Kuroshio Subsurface Water (KSSW) was probably influenced by the external transport of DIC-enriched water from the South China Sea. Vertical profiles of hydrological parameters and carbonate species indicated that the Kuroshio Current off eastern Taiwan could intrude into the ECS shelf as far as 27.9° E, 125.5° N in spring. What is more, the KSW, KSSW and Kuroshio Intermediate Water (KIW) could convey DIC into the East China Sea (ECS) with flux of 285, 305 and 112 Tg C/half year (1 Tg = 1012 g), respectively. The relevant flux of POC was 0.16, 2.93 and 0.04 Tg C/half year, respectively. Consequently, the intrusion of Kuroshio could probably exert a counteracting influence on the potential of CO2 uptake in the ECS, which needs further study.
The role of aortic carboxypeptidase-like protein (ACLP) in 3T3-L1 preadipocyte and adipocyte function

Aortic carboxypeptidase-like protein (ACLP) is a 175kDa secreted protein that is downregulated with adipogenesis. I engineered 3T3-L1 preadipocytes that overexpressed ACLP protein and sustained the overexpression with differentiation. I assessed the role of sustained ACLP overexpression on 3T3-L1 adipogenesis, with a focus on possible ACLP interaction with collagen-I during differentiation. ACLP overexpression did not affect 3T3-L1 adipogenesis under standard cell culture conditions. ACLP overexpression did not affect subconfluent preadipocyte proliferation, apoptosis in serum-supplemented preadipocytes, or serum-deprived preadipocyte cell death. Sustained ACLP overexpression did not affect collagen I/III protein expression, or the activity of matrix metalloproteinase (MMP)-2 and MMP-9 extracellular degrading enzymes. However, sustained ACLP overexpression on collagen-I coated dishes inhibited the expression of three key differentiation markers, peroxisome proliferator-activated receptor y, CCAAT enhancer-binding protein q and fatty acid synthase and decreased insulin-stimulated Akt/protein kinase B phosphorylation. This suggests that a collagen-I-rich environment is necessary for ACLP to alter preadipocyte function.
58Fe AND 54Cr IN EARLY SOLAR SYSTEM MATERIALS

Stepwise dissolution of primitive meteorites exhibits large 54Cr anomalies but no collateral effects on 58Fe and 48Ca, two other neutron-rich nuclides from the iron peak. These results suggest that 54Cr must have been produced in particular zones of the rare Type Ia supernovae or that 48Ca and/or 58Fe were produced together in Type II supernovae and were chemically separated into some mineral phase that favors Cr over Ca and Fe, and it is the dissolution properties of that phase that is driving the isotopic effect in leaching. The recent findings of nanometer-size oxide grains with very large 54Cr excesses favored the latter scenario for the origin of the mono-isotopic Cr isotopic effect. In addition, the absence of isotopic variations in the 58Fe/54Fe ratio at the mineral scale confirms that the short-lived nuclide 60Fe (T1/2 = 2.62 Myr) was homogeneously distributed to a less than 15% dispersion in the early solar nebula.
The future of solar fuels: when could they become competitive?

Solar energy driven processes with H2O and CO2 as basic feedstocks can produce “solar fuels” that could substitute their fossil based counterparts. This article summarizes the main findings of a techno-economic analysis of systems that can generate different types of fuels with renewable energy as starting point. These “renewable fuels” could potentially play a key role in future energy systems, both as a storage medium in the power sector and as an energy carrier in e.g. the transport sector, or deliver fundamental building blocks for the chemical industry. We determine whether, how, and when renewable fuels might become competitive alternatives for fossil fuels. The technologies required to produce renewable fuels are analyzed by the application of learning curves associated with individual system components. We thereby make projections for possible decreases in investment costs and reductions in fuel production costs. In an optimistic scenario we find that competitivity could be reached between 2025 and 2048 for all renewable energy production pathways that we investigate, for hydrogen, syngas, methanol, and diesel. Two techniques yield break-even costs before 2050 even in a conservative base case scenario: H2 production through electrolysis and diesel production by Fischer–Tropsch synthesis. Both processes use solid oxide electrolysis, which profits from rapid cost reductions and high efficiency.
Mass spectrometric analysis of the Mg plasma produced by double-pulse femtosecond laser irradiation

The capabilities of a double-pulse (DP) femtosecond (fs) laser ablation of solid materials as an ion source for application in a miniature Laser ionisation time-of-flight Mass Spectrometer (LMS) system designed for space research are investigated. The studies are conducted by irradiating a high-purity Mg sample with sequences of two femtosecond laser pulses. The positively charged fraction of the Mg plasma is analysed as a function of the inter-pulse delay in the range from 0 to 300 ps and for pulse energies in the range from 0.2 to 1 μJ. The DP ablation studies with both pulses of similar energy show a Mg+ ion yield enhancement within the inter-pulse delay range from 1 to 35 ps near the ablation energy threshold (AET) and from 1 to ∼300 ps if larger pulse energies are applied for the first ablation pulse. For the same total energies but different individual pulse energies, Mg+ ions are produced more efficiently if the weaker pulse is applied first. The analyses of Mg+, multiple-charged Mg and Mg cluster ion yields as a function of the inter-pulse delay and the pulse energies improve the understanding of the ablation mechanism and add some insights into the dynamics of the Mg-surface melting and cooling phases, thermal characteristics of the expanding plasma plume and atomic/cluster ion production mechanisms. By applying sufficiently high DP energies > (0.3 + 0.3) μJ the clusters which are likely produced in the initial ablation phase at the surface can be decomposed effectively in the heated plasma plume. Moreover, by tuning the inter-pulse delay one can also efficiently suppress the neutral-ion reactions in post-plasma chemistry. Our studies show that the DP femtosecond laser ablation ion source can improve the mass spectrometric analysis of solid samples by increasing the ion yield of atomic ions and reducing the abundance of cluster ions. This can improve the quantitative analyses of elements and their isotopes by increasing signal-to-noise ratios and reducing isobaric interferents arising from cluster ions. The current DP studies are conducted successfully with pulse energies lower than 1 μJ, which is sufficiently low to be realised in a compact, lightweight system using fibre technology based lasers, suitable for in situ space applications.
The Use of Thermography Images in the Description of the Humidification Bulb in Soilless Culture

ABSTRACT Thermography is a tool used in many scientific disciplines, including agriculture. Determining the behavior of a nutritive solution in soilless culture containers using substrates is very important in order to establish the position of drippers, drainage holes, the use of humidification agents, and fertigation management in culture units. This paper describes the application of thermography to determine the humidification bulb in horticulture crops to rapidly diagnose the best way to advance fertigation in different horticultural substrates in soilless culture. Thermography was seen to be an excellent tool for evaluating the movement and distribution of the nutritive solution within the soilless culture container with different substrates.
Experimental study of light emitted by spark-generated bubbles in water

The emission of light from spark-generated bubbles freely oscillating in water far from boundaries is studied experimentally. The observations concentrate on light flashes radiated at final stages of the first bubble contraction and early stages of the following bubble expansion. It is shown that the shape of the emitted light pulses is not “Gaussian”, but asymmetric with a leading edge moderately growing and a trailing edge steeply decreasing. The maximum values and widths of these optical pulses are determined for bubbles having different sizes and oscillating with different intensities. The variation of the maximum values and pulse widths with bubble size and intensity of oscillation is discussed, as well as the observed weak correlation between these two quantities.
Faculty Interpretations of Sociotechnical Thinking in their Classrooms: Techniques for Integration

Kathryn Johnson is a Professor at the Colorado School of Mines in the Department of Electrical Engineering. In the Fall 2011, she was a visiting researcher at Aalborg University in Denmark, where she collaborated on wind turbine control research and experienced Aalborg’s Problem-Based Learning method. She has researched wind energy control systems across a range of areas since 2002. Partially inspired by her time at Aalborg U. she has applied experiential learning techniques in several wind energy and control systems classes and began engineering education research related to social justice and sociotechnical thinking in engineering starting in Fall 2014.
PUBLIC HEALTH IMPLICATIONS OF TOXOPLASMOSIS IN ANIMALS AND WOMEN IN SELECTED LOCALITIES OF MENOUFIA GOVERNORATE, EGYPT

Toxoplasma gondii is an important protozoan with serious obstetric impact in animals and women. The work aimed to relate public health significance of toxoplasmosis among some animals and women in Menoufia Governorate. A total 50 blood samples were collected from 50 adult sheep (30 from Kafr Tanbidi and 20 from Shebein El-Kom) and a total of 31 cattle milk samples were collected from different localities in Shebein El-Kom. Sheep sera were examined by ELISA IgG and recorded seropositivity of 60% (30/50) with 66.67% (20/30) were positive in Kafr Tanbidi and 50% (10/20) in Shebein El-Kom. PCR on sheep blood recorded 22% (11/50), of them 20% (6/30) were positive in Kafr Tanbidi and 25% (5/20) in Shebein El-Kom while PCR on cattle milk revealed 19.35% (6/31) positive for Toxoplasma DNA. On the other hand, Toxoplasma seroprevalence among 250 women was 54.4% (136/250) by ELISA IgG and 8.4% (21/250) by ELISA IgM. There was a significant association between IgG seroprevalence and age, increased gravidity, abortion, climate, cat contact, consumption of raw cow milk, undercooked meat and contaminated water from wells and between IgM seroprevalence and age, abortion and climatic conditions prevailed during sampling.
PEMANFAATAN WHATSAPP SEBAGAI MEDIA PEMBELAJARAN DALAM JARINGAN MASA PANDEMI COVID-19 DI KELAS VI SEKOLAH DASAR

ABSTRAK Lestari, Wiji. 2021. Pemanfaatan WhatsApp sebagai Media Pembelajaran dalam Jaringan Masa Pandemi Covid-19 kelas VI di Sekolah Dasar, FKIP Universitas Jambi, Pembimbing: (I) Drs. Arsil, M.Pd. , (II) Silvina Noviyanti, S.Pd. , M.Pd. Kata Kunci: WhatsApp, Media Pembelajaran, Pembelajaran dalam Jaringan. Penelitian ini bertujuan untuk mendeskripsikan: (1) Pemanfaatan WhatsApp sebagai media pembelajaran dalam jaringan masa pandemi Covid-19 di kelas VI B SDN 131/IV Kota Jambi (2) Hambatan yang terjadi dalam pemanfaatan WhatsApp sebagai media pembelajaran dalam jaringan masa pandemi Covid-19 di kelas VI B SDN 131/IV Kota Jambi (3) Solusi yang dilakukan untuk mengatasi hambatan dalam pemanfaatan WhatsApp sebagai media pembelajaran dalam jaringan masa pandemi Covid-19 di kelas VI B SDN 131/IV Kota Jambi. Penelitian ini dilakukan di SDN 131/IV Kota Jambi pada bulan Oktober – November 2020. Jenis penelitian ini adalah kualitatif deskriptif dengan jenis penelitian fenomenologi yang mendeskripsikan mengenai pemanfaatan WhatsApp sebagai media pembelajaran dalam jaringan masa pandemi Covid-19. Data dari penelitian ini diperoleh melalui wawancara bersama Wali kelas yang menjadi sumber utama dari penelitian ini, kemudian wawancara bersama 5 peserta didik kelas VI B, observasi berupa observasi partisipasi pasif serta dokumentasi sebagai data pendukung dari hasil wawancara. Hasil penelitian menujukkan bahwa guru telah memanfaatkan WhatsApp sebagai media pembelajaran dalam menunjang kegiatan pembelajaran dalam jaringan (Daring) dengan memanfaatkan berbagai fitur yang tersedia seperti fitur foto, video, dokumen dan video call. Kemudian dalam pelaksanaan pemanfaatan WhatsApp sebagai media pembelajaran terdapat bebarapa hambatan yaitu gangguan Sinyal, memori HP penuh, Kurangnya Interaksi, sulit mengetahui keseriusan belajar peserta didik, kurangnya motivasi belajar peserta didik, fasilitas pendukung pembelajaran online, dan sulit memahami materi yang diberikan, serta pada penelitian ini mendekripsikan solusi yang dilakukan untuk mengatasi hambatan yang terjadi dari pemanfaatan whatsApp sebagai media pembelajaran dalam jaringan masa pandemi Covid-19. Dari hasil penelitian ini disarankan agar pendidik mampu membuat variasi pembelajaran terutama dengan menggunakan fitur yag ada pada whatsApp, menguasai dan menggunakan TIK dalam proses pembelajaran dalam jaringan (Daring).
Stationary Fatigue Resistance of Various Rotary Instruments with Different Alloys after Preparing Three Root Canals

Objective: This study aimed to evaluate the stationary fatigue resistance of three endodontic instrument systems after preparing three root canals with different curvatures and comparing them with unused instruments. Methods: A total of 60 endodontic files from 3 instrument systems, TruNatomy (TRN), HyFlex CM (HFC) and Revo-S (RS), were selected for this study. These systems were divided into 2 groups: Group I (Used files) and Group II (Unused files). Each group was further divided into 3 subgroups, each containing 10 TRN (#26/v.04), 10 HFC (#25.04) and 10 RS (#25/.04) rotary files. The group I instruments were used for shaping the root canals of extracted third molars, while the group II instruments were not used for canal shaping procedures. Both Group I and Group II instruments were subjected to stationary cyclic fatigue testing at simulated body temperature (37±0.5°C) using a stainless-steel block with an artificial canal. The number of cycles to failure (NCF), the length of fractured instruments and the preparation time were recorded. The statistical analysis was performed using two-way ANOVA and Tukey post-hoc tests with a 95% confidence interval (P=0.05). Results: NCF was signiﬁcantly affected by the instrument type and whether the instrument was unused or used (P<0.001). The Group II instruments were more resistant to stationary cyclic fatigue than Group I (P<0.05). HFC instruments were most resistant to stationary fatigue among all tested conditions, followed by TRN and RS instruments. Canal preparation with TRN was significantly faster than with HFC and RS. During preparation, no file was fractured. A statistically significant difference (P<0.05) was observed in the mean length of the fractured instruments among used instrument groups. Conclusion: The stationary cyclic fatigue resistance of HFC instruments were significantly greater than that of the TRN and RS instruments (P<0.05). TRN was faster in shaping the root canals than other instruments tested in the study.