s block elements Part4.pptx
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The alkali metals are highly reactive due to their large size and low ionization enthalpy. Their reactivity increases down the group. They react vigorously with water to form hydroxides and dihydrogen gas. Lithium reacts less vigorously than the other alkali metals due to its smaller size and high hydration energy. The other alkali metals react explosively with water and also react with proton donors like alcohols, ammonia, and alkynes.
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The alkali metals have one valence electron and are the most electropositive metals. They have large atomic and ionic radii that increase down the group, and their hydration enthalpies decrease with increasing size. Alkali metals are soft, silvery-white metals with low melting and boiling points that are highly reactive due to their large size and low ionization enthalpy, with reactivity increasing down the group. They react with air, water, dihydrogen, and halogens. Uses include lithium in batteries, aluminum in aircraft, and potassium chloride as fertilizer.
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Dr. Sonia Rani presents information on s-block elements and their properties. S-block elements have electrons that enter the outermost s-orbital and include groups 1 and 2 of the periodic table. Group 1 elements are alkali metals that form strongly alkaline hydroxides when reacting with water. Group 2 elements are alkaline earth metals whose oxides and hydroxides are also alkaline. Diagonal relationships exist between lithium/magnesium and beryllium/aluminum due to their similar ionic sizes and charge/radius ratios. Washing soda, or sodium carbonate, is used for softening water and cleaning and exists as a decahydrate that loses water of crystallization when heated
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The alkali metals have one valence electron and are the most electropositive metals. They have large atomic and ionic radii that increase down the group, and their hydration enthalpies decrease with increasing size. Alkali metals are soft, silvery-white metals with low melting and boiling points that are highly reactive due to their large size and low ionization enthalpy, with reactivity increasing down the group. They react with air, water, dihydrogen, and halogens. Uses include lithium in batteries, aluminum in aircraft, and potassium chloride as fertilizer.
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https://www.etran.rs/2024/en/home-english/Bob Reedy - Nitrate in Texas Groundwater.pdf
Presented at June 6-7 Texas Alliance of Groundwater Districts Business Meeting
Micronuclei test.M.sc.zoology.fisheries.
Current Ms word generated power point presentation covers major details about the micronuclei test. It's significance and assays to conduct it. It is used to detect the micronuclei formation inside the cells of nearly every multicellular organism. It's formation takes place during chromosomal sepration at metaphase.
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills of Minnesota developed a method to convert waste into high-value dry fertilizer, significantly enriching soil quality. By providing farmers with a valuable resource derived from waste, Travis Hills helps enhance farm profitability while promoting environmental stewardship. Travis Hills' sustainable practices lead to cost savings and increased revenue for farmers by improving resource efficiency and reducing waste.
What is greenhouse gasses and how many gasses are there to affect the Earth.
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...University of Maribor
Slides from talk:
Aleš Zamuda: Remote Sensing and Computational, Evolutionary, Supercomputing, and Intelligent Systems.
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Inter-Society Networking Panel GRSS/MTT-S/CIS Panel Session: Promoting Connection and Cooperation
https://www.etran.rs/2024/en/home-english/Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...
The pygmy halfbeak Dermogenys colletei, is known for its viviparous nature, this presents an intriguing case of relatively low fecundity, raising questions about potential compensatory reproductive strategies employed by this species. Our study delves into the examination of fecundity and the Gonadosomatic Index (GSI) in the Pygmy Halfbeak, D. colletei (Meisner, 2001), an intriguing viviparous fish indigenous to Sarawak, Borneo. We hypothesize that the Pygmy halfbeak, D. colletei, may exhibit unique reproductive adaptations to offset its low fecundity, thus enhancing its survival and fitness. To address this, we conducted a comprehensive study utilizing 28 mature female specimens of D. colletei, carefully measuring fecundity and GSI to shed light on the reproductive adaptations of this species. Our findings reveal that D. colletei indeed exhibits low fecundity, with a mean of 16.76 ± 2.01, and a mean GSI of 12.83 ± 1.27, providing crucial insights into the reproductive mechanisms at play in this species. These results underscore the existence of unique reproductive strategies in D. colletei, enabling its adaptation and persistence in Borneo's diverse aquatic ecosystems, and call for further ecological research to elucidate these mechanisms. This study lends to a better understanding of viviparous fish in Borneo and contributes to the broader field of aquatic ecology, enhancing our knowledge of species adaptations to unique ecological challenges.
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1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
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8.Isolation of pure cultures and preservation of cultures.pdf
Isolation of pure culture, its various method.
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
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Evaporation step counter work. I have done a physical experiment.
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s block elements Part4.pptx
- 3. Chemical Properties • The alkali metals are highly reactive due to their large size and low ionization enthalpy. • The reactivity of these metals increases down the group.
- 5. • In all these oxides the oxidation state of the alkali metal is +1. • Lithium shows exceptional behaviour in reacting directly with nitrogen of air to form the nitride, Li3N as well. • Because of their high reactivity towards air and water, alkali metals are normally kept in kerosene oil.
- 7. Reactivity towards water • The alkali metals react with water to form hydroxide and dihydrogen. • lithium react with water less vigorous than that of sodium among the alkali metals. • This behaviour of lithium is attributed to its small size and very high hydration energy. • Other metals of the group react explosively with water. They also react with proton donors such as alcohol, gaseous ammonia and alkynes