This article discusses the importance and potential of pulsed electrolysis as a method of hydrogen generation with an emphasis on optimizing the efficiency of the process. It focuses on comparing the ...use of pulsed current and voltage versus DC current, emphasizing the influence of various parameters and their role in increasing the efficiency of the electrolytic process. It discusses the results of an experimental analysis that compares the efficiency of different modes of pulsed electrolysis against DC current. At the same time, it emphasizes the significant influence of parameters such as frequency, voltage and electrode material on the efficiency of the process. The article also provides recommendations for further research in the area of increasing the efficiency of pulsed electrolysis, which could lead to a significant shift in the field of hydrogen energy production.
音声をはじめとする複雑な運動行動を理解するためには,その行動を構成する個々の運動の相対的なタイミングを把握する必要がある。そのような複雑な協調運動(coordination)の記述には,力学系(dynamical systems ...theory)が提供する概念や道具立てが適している。中でも「位相」(phase)の概念は,事象の相対的タイミングを表すのに中心的な役割を果たす。本稿では,位相が協調運動を捉えるのに有用であることを,音節や句の反復発話,手の運動,複数の話者が発話をシンクロナイズさせる同期発話,調音音声合成など,様々な具体例を用いて例証する。さらに,周期的・等時的な運動だけでなく,非周期的・非等時的な協調運動についても位相の概念を適用できることを示す。これにより,一話者内の運動の相対的タイミングだけでなく,複数の話者による運動の相対的タイミングも,協調運動に関する同一の枠組みで捉えることが可能となる。
Provider: Czech digital library/Česká digitální knihovna - Institution: National Medical Library/Národní lékařská knihovna - Data provided by Europeana Collections- Ivan Hollý, Martin Šimko, Juraj ...Šimko- Lit: 12- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
The performance of ruminants is affected mainly by the rumen bacterial community. The composition and properties of the rumen bacterial community depend largely on the diet components that are fed to ...the ruminant. The aim of this study was to determine the effect of grape pomace intake on the rumen bacterial community of sheep. Four different diets, two of which contained dried grape pomace (DGP), were used in this study. Rumen fluid samples from 12 wethers were used for 16S rRNA gene sequencing and subsequent bacterial identification. At the phylum level, Bacteroidetes and Firmicutes; at the family level, Prevotellaceae and Porphyromonadaeceae; and at the genera level, Prevotella and Verrucomicrobia_Subdivision5_genera_incertae_sedis were the most common regardless of the diet the animals were fed. After the addition of DGP to the diet, the relative abundance of Methanobrevibacter, Butytirivibrio, Fretibacterium, and Verrucomicrobia _Subdivision3 _genera_incertae_sedis significantly increased, whereas that of Succiniclasticum and Selenomonas significantly decreased. The upregulated pathway of methanogenesis from H2 and CO2 was supported by a significant increase in Methanobacteriaceae after the diet was supplemented with DGP. The rumen bacterial community diversity indices (Richness and Shannon) were significantly affected by diet composition as well as by the change of housing location. The addition of DGP into the wethers’ diet increased the richness of the rumen bacterial community, which is good for maintaining rumen bacterial homeostasis. No adverse effect of the addition of DPG on the rumen bacterial community was noted.
Ferrous hydroxychlorides are geochemically important but less recognized mineral species due to their extreme sensitivity to oxidation and hydration in contact with air {typically they convert to ...akaganéite Fe3+(O,OH,Cl)}. Only the γ-form was previously known as the orthorhombic mineral hibbingite, associated with altered mafic intrusive rocks. In this study, we describe the β-polymorph of Fe2(OH)3Cl as a new mineral parahibbingite that was found in pyroxenite from the Karee platinum mine in the Bushveld Complex, South Africa. The two minerals were distinguished by a combination of Raman spectroscopy and FIB-SEM-TEM analytical techniques (TEM-EDX and TEM-SAED). They can be easily recognized by their distinct Raman spectra. Parahibbingite has two very strong vibration bands at ∼3550 and 3560 cm-1, accompanied by much weaker bands at ∼124 and 160 cm-1, while the Raman spectrum of hibbingite has a sharp, strong band at 3450 cm-1 and two moderate bands at 199 and 385 cm-1. Parahibbingite was found as fine-grained reaction rims at the contact of orthopyroxene phenocrysts and talc inside a drill core. It has a trigonal space group R3m, a = 6.94(5) A.#9; c = 14.5(2) A.#9, with an empirical formula (Fe1.982+Mn0.012+Ca0.01)(OH)3.08Cl0.92. The origin of this mineral in the Bushveld Complex is most likely related to a late hydrothermal alteration of pyroxenite. Hibbingite forms as an abundant daughter mineral hosted by fluid inclusions and salt melt inclusions in hydrothermal quartz associated with granitic systems during cooling under reducing conditions. Such inclusions are common in Au-porphyry mineralization worldwide, such as the Biely Vrch (Slovakia) deposit studied in detail in this work. The lattice parameters obtained by TEM-SAED are a = 6.30 A.#9, b = 7.12 A.#9, and c = 9.89 A.̊ Hibbingite was recognized as the only phase that carries "water" (as a hydroxyl group) in otherwise water-free, salt melt inclusions. Furthermore, both hibbingite and parahibbingite should be considered as reservoirs for Cl and H2O in large volumes of altered basic and ultrabasic rocks. They can transport volatiles to shallow levels of subduction zones. Alternatively, their dissolution can fuel remobilization, transport, and deposition of sulfidic ores in saline fluids. Their detection, however, is difficult because of their sensitivity to oxidizing atmospheres. For example, in natural outcrops exposed to air, they may vanish, thus distorting estimates of their abundance and role in many processes that involve mineral-derived volatiles.
Looking for non-antibiotic substances that can enhance health by improving the gastrointestinal microbiome of animals is an ongoing task. Among other compounds, medium-chain fatty acids, such as ...lauric acid, can exert positive effects. Coconut oil is a rich source of lauric acid, and therefore, the aim of this study was to describe the effect of adding coconut oil to the feed of growing pigs on intestinal microbiome diversity and bacterial abundance. Rectal swab samples were analyzed to assess the intestinal microbiomes of pigs. Typically, growing pigs are characterized by continuously changing bacterial communities as a result of aging. However, a significant effect of coconut oil treatment was detected in the presented study. Decreases in Corynebacterium, Pseudomonadales, and Mitsuokdla and increases in Alloprevotella, Bifidobacteriales, and Lactobacilli could be attributed to the supplementation of feed with coconut oil. Coconut oil treatment did not have a significant effect on the diversity index of rectal microbiomes, but an abundant increase in probiotics such as Bifidobacterium and Lactobacillus in the gastrointestinal tract is desirable in pig breeding. From this point of view, the addition of coconut oil to the feed of pigs is a good option for improving the microbiome in their gastrointestinal tracts.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
Prospective randomized placebo controlled double blind trial.
To examine the effect of ESP block after minimally invasive posterior stabilization for vertebral fractures on opioid consumption, pain, ...blood loss, disability level, and wound healing complications.
Patients indicated for minimal invasive posterior stabilisation were included to the study. Our primary outcome was the opioid consumption and Visual Analogue Scale (VAS) measured during the first 48 hours. Secondary outcomes used to measure the short-term outcome included Oswestry Disability Index (ODI) and Patient Reported Outcome Spine Trauma (PROST).
In total, 60 patients were included with a 93.3% follow-up. Average morphine consumption during the PACU (Post Anaesthesia Care Unit) period was 5.357 mg in ESP group and 8.607 mg in placebo group (
= .004). Average VAS during first 24 hour was 3.944 in ESP group and 5.193 in placebo group (
= .046). Blood loss was 14.8 g per screw in ESP group and 15.4 g in placebo group (
= .387). The day2 PROST value was 33.9 in ESP group and 28.8 in placebo group (
= .008) and after 4 weeks 55.2 in ESP group and 49.9 in placebo group (
= .036). No significant differences in ODI were detected.
The use of ESP block in minimally invasive spinal surgery for posterior fracture stabilization leads to a significant reduction of opioid consumption during PACU stay by 37.7%. Reduction of opioid consumption was accompanied with lower pain (VAS). We found positive effect of the ESP block on short term outcome scores, but no effect on perioperative blood loss and wound healing.
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