4,4′-Dimethylazobenzene as a chemical actinometer

Chemical actinometers are a useful tool in photochemistry, which allows to measure the photon flux of a light source to carry out quantitative analysis on photoreactions. The most commonly employed actinometers so far show minor drawbacks, such as difficult data treatment, parasite reactions, low stability or impossible reset. We propose herewith the use of 4,4′-dimethylazobenzene as a chemical actinometer. This compound undergoes a clean and efficient E/Z isomerization, approaching total conversion upon irradiation at 365 nm. Thanks to its properties, it can be used to determine the photon flux in the UV–visible region, with simple experimental methods and data treatment, and with the possibility to be reused after photochemical or thermal reset. Graphical abstract

Nickel Silicide Catalyst from Photovoltaic Waste for the Methanation Reaction

A technology designed for recycling photovoltaic (PV) cells at the end of their life was successfully used for the preparation of a nickel silicide catalyst. PV cells were mixed with magnesium scrap to produce magnesium silicide (Mg2Si), with almost total conversion under optimized conditions (400 °C, 5 Pa, 25 min), in a constructed semi-open tubular reactor. Subsequently, magnesium silicide was hydrolyzed by 25% phosphoric acid to produce a mixture of silicon hydrides, which were utilized as chemical vapor deposition (CVD) precursors for the preparation of a nickel silicide catalyst. The activity and stability of the prepared catalyst was repeatedly tested for methanation reactions. It was verified that the nickel silicide catalyst showed an approximately 20% higher activity for the methanation reactions compared to the commonly used nickel catalyst.

Major Total Conversion in English: The Question of Directionality

<p>This research investigates the directionality of major total conversion in English, where major total conversion is defined as the process and at the same time as the result of deriving a new lexical item by altering the part of speech of the base without marking the alteration overtly, as in the presumed pair dry – to dry. The question is whether there is a reliable strategy for deciding which member of a pair is the base and which member is the converted counterpart. Various attempts had been made to resolve the controversial directional issue, but the results have been inconsistent. The investigation aims to discover whether or not there exists a coherent notion about how to decide directionality by considering four factors assumed in the literature to reflect directionality. A large corpus of potential examples of major total conversion was collected to act as test materials. The four factors were compared for each major total conversion pair to see to what extent there was agreement among them. Results showed the factors did not agree to the expected extent. The findings are discussed in detail and it is claimed the inconsistencies can often be explained with recourse to a few general principles. In conclusion, on the whole the four factors considered are consistent with one another. In other words, the notion about how to determine directionality in major total conversion is coherent and can be maintained for English.</p>

Major Total Conversion in English: The Question of Directionality

<p>This research investigates the directionality of major total conversion in English, where major total conversion is defined as the process and at the same time as the result of deriving a new lexical item by altering the part of speech of the base without marking the alteration overtly, as in the presumed pair dry – to dry. The question is whether there is a reliable strategy for deciding which member of a pair is the base and which member is the converted counterpart. Various attempts had been made to resolve the controversial directional issue, but the results have been inconsistent. The investigation aims to discover whether or not there exists a coherent notion about how to decide directionality by considering four factors assumed in the literature to reflect directionality. A large corpus of potential examples of major total conversion was collected to act as test materials. The four factors were compared for each major total conversion pair to see to what extent there was agreement among them. Results showed the factors did not agree to the expected extent. The findings are discussed in detail and it is claimed the inconsistencies can often be explained with recourse to a few general principles. In conclusion, on the whole the four factors considered are consistent with one another. In other words, the notion about how to determine directionality in major total conversion is coherent and can be maintained for English.</p>

Effect of Adding Different Levels of Energy and Protein in The Production Performance of Quail

The study was conducted in one of the research farms belong to Department of Animal Production/Faculty of Agriculture at Tikrit University for the period from 11/9/2020 to 16/10/2020 to determine the appropriate diets from energy and protein and impact on the production performance of the developing quail bird. Two Hundred – Forty eight quail chicks with age of 7-35 days. The birds were divided into two treatments, each treatment contained four replicates with 31 birds per replicate. The first treatment was fed on a diet containing 20% protein, energy ( 2800 Kcal/kg). the second treatment was fed on a diet containing 22% protein, energy ( 2900 Kcal/kg).The results showed no significant differences in body weight during first, second and fifth weeks, while there were significant differences during the third and fourth weeks while the second treatment recorded an increase as comparison with the first treatment in this descripton. And the presence of significant differences during the period 2 to 3 sevenths in the rate of weight gain and the absence of significant differences during the remaining periods and there are no significant differences between the treatments in the rate of consumption of feed during the second and third week and the presence of significant differences during the fourth week where the second treatment recorded an increase as comparison with the first treatment and the absence of significant differences during the fifth week and the total period there are no significant differences between the treatments in feed conversion efficiency during the first week and the presence of significant differences during the second week where they recorded an increase as comparison with The first treatment is on the second treatment. There were significant differences between the treatments during the third week, where the second treatment recorded an increase as comparison with the first treatment. There are no significant differences between treatments during the fifth week and total conversion efficiency.

Electric Vehicles That Extract Heat from the Air Without Charging: Entropy Law Does Not Prohibit This

Electromobiles protect the biosphere in places of human residence. Globally, they destroy it, as the electrical energy they consumed is extracted using "dirty" energy carriers. This article suggests learning the electromobiles to generate electrical energy in eco-friendly way, extracting heat from the air. Specifically, we suggest to equip the electromobiles with the Or lov and etc. installation, which schematically is a converging tube where the air flow is by itself accelerated and, according to the Bernoulli equation, is cooled; and its narrow end contains the electrical energy generating turbine. The problem is that the Orlovand etc. installation is prohibited by the entropy increase law due to the flow entropy decrease during its operation. However, it is important that actually in this case the Clausius entropy, i.e. thermal entropy, decreases. The thermal and total entropy increase laws are different laws that separately require verification. Planck, Fermi et al. indicatedthe cases of total conversion of heat into other forms of energy accompanied by thermal en- tropy decrease. These cases, proving invalidity of the thermal entropy increase law, admit transition to electromobiles with air heat trac- tion. As well as transition of water transport to ship's electric engines with water heat traction.

Redirection of the central metabolism of Klebsiella pneumoniae towards dihydroxyacetone production

Background Klebsiella pneumoniae is a bacterium that can be used as producer for numerous chemicals. Glycerol can be catabolised by K. pneumoniae and dihydroxyacetone is an intermediate of this catabolism pathway. Here dihydroxyacetone and glycerol were produced from glucose by this bacterium based a redirected glycerol catabolism pathway. Results tpiA, encoding triosephosphate isomerase, was knocked out to block the further catabolism of dihydroxyacetone phosphate in the glycolysis. After overexpression of a Corynebacterium glutamicum dihydroxyacetone phosphate dephosphorylase (hdpA), the engineered strain produced remarkable levels of dihydroxyacetone (7.0 g/L) and glycerol (2.5 g/L) from glucose. Further increase in product formation were obtained by knocking out gapA encoding an iosenzyme of glyceraldehyde 3-phosphate dehydrogenase. There are two dihydroxyacetone kinases in K. pneumoniae. They were both disrupted to prevent an inefficient reaction cycle between dihydroxyacetone phosphate and dihydroxyacetone, and the resulting strains had a distinct improvement in dihydroxyacetone and glycerol production. pH 6.0 and low air supplement were identified as the optimal conditions for dihydroxyacetone and glycerol production by K, pneumoniae ΔtpiA-ΔDHAK-hdpA. In fed batch fermentation 23.9 g/L of dihydroxyacetone and 10.8 g/L of glycerol were produced after 91 h of cultivation, with the total conversion ratio of 0.97 mol/mol glucose. Conclusions This study provides a novel and highly efficient way of dihydroxyacetone and glycerol production from glucose.

Modding as game development: Investigating the influences over how mods are made

Over the past few decades, game mods have slowly walked their way into mainstream popularity and although not being confined anymore to the dark corners of the internet, the reality is that we still do not know much about how mods are created and how modders manage to achieve their objectives. Seeking to better understand the activity of mod development, this article explores key influencing factors on mod projects coordination and development by taking a qualitative approach based on in-depth interviews with nine lead developers of total conversion mod projects. We identified three key factors – tendency towards agility, co-creative nature and open source attitude – that we believe are etched at the core of the activity of modding and that lead to, and are manifested, in the unique ways of how modders approach software development.

STRATEGI ON RELEASING NON-PRODUCTIVE OF FOREST CONVERSION AREA FOR TORA PROGRAM IN RIAU PROVINCE

Development process needs lands as natural resources. Unfortunately, availability of land is relatively limited. Therefore, it needs releasing process of forestland to become non forestland. In the process of releasing the forestland, there are some policies which need stakeholders to consider so the minimum required forestland of 30% is fulfilled. Releasing forestland area is possible to undertake on non-productive forest conversion area which is also for the government agrarian reform programs which is called Nawacita. The objective of this research is tooffer answer about the indicative forestland which can be used for development needs, particularly for poor people who live near the forest. The results indicate that non-productive of conversion forest can provide land for development in Riau Province for about 205,847.86 hectares (93.01%) from the total conversion forest area based on agrarian reform program. Permanent forested land which needs to be maintained as forest area is 1,102.42 hectares, because most of the area are still primary forests. For the effectiveness of releasing conversion forest area, socialization programs to inform the community is needed.

The Effect of the Reaction Conditions on the Properties of Products from Co-hydrotreating of Rapeseed Oil and Petroleum Middle Distillates

This study compares the hydrotreating of the mixture of petroleum middle distillates and the same mixture containing 20 wt % of rapeseed oil. We also study the effect of the temperature and the weight hourly space velocity (WHSV) on the co-hydrotreating of gas oil and rapeseed oil mixture. The hydrotreating is performed over a commercial hydrotreating Ni-Mo/Al2O3 catalyst at temperatures of ca. 320, 330, 340, and 350 °C with a WHSV of 0.5, 1.0, 1.5, and 2.0 h−1 under a pressure of 4 MPa and at a constant hydrogen flow of 28 dm3·h−1. The total conversion of the rapeseed oil is achieved under all the tested reaction conditions. The content of the aromatic hydrocarbons in the products reached a minimum at the lowest reaction temperature and WHSV. The content of sulphur in the products did not exceed 10 mg∙kg−1 at the reaction temperature of 350 °C and a WHSV of 1.0 h−1 and WHSV of 0.5 h−1 regardless of the reaction temperature. Our results show that in the hydrotreating of the feedstock containing rapeseed oil, a large amount of hydrogen is consumed for the dearomatisation of the fossil part and the saturation of the double bonds in the rapeseed oil and its hydrodeoxygenation.