Organske reakcije u vodi Dajana Gašo-Sokač; Valentina Bušić; Dora Zobundžija ...
Kemija u industriji; časopis kemičara i tehnologa Jugoslavije,
09/2023, Letnik:
72, Številka:
9-10
Journal Article
Recenzirano
Odprti dostop
Velik je izazov provoditi organske reakcije u vodi. U posljednjem desetljeću broj znanstvenih istraživanja koja se bave proučavanjem vode kao zelenog otapala nastavio je eksponencijalno rasti. Osim ...što je jeftina, voda nije štetna za okoliš, a ponekad daje potpuno neočekivanu reaktivnost u kemijskim reakcijama. Postoji širok raspon organskih reakcija koje se mogu odvijati u vodi: od uobičajenih oksidoredukcijskih reakcija, reakcija koje uključuju karbokatione, pericikličkih reakcija, reakcija prijelaznih metala itd. Organske reakcije u vodenom mediju primjenjuju se u kemiji ugljikohidrata i kemijskoj modifikaciji biomolekula. U novije vrijeme voda se upotrebljava kao medij u mikrovalnoj sintezi. Ovaj pregledni rad daje uvid u važnost ovog područja budući da se organske reakcije u vodi kao otapalu odvijaju po principima zelene kemije.
Water Activity in Foods Gustavo V. Barbosa-Cánovas, Anthony J. Fontana, Shelly J. Schmidt, Theodore P. Labuza
2020, 2020-05-14, 2020-06-01
eBook
This second edition of Water Activity in Foods furnishes those working within food manufacturing, quality control, and safety with a newly revised guide to water activity and its role in the ...preservation and processing of food items. With clear, instructional prose and illustrations, the book's international team of contributors break down the essential principles of water activity and water–food interactions, delineating water's crucial impact upon attributes such as flavor, appearance, texture, and shelf life. The updated and expanded second edition continues to offer an authoritative overview of the subject, while also broadening its scope to include six newly written chapters covering the latest developments in water activity research. Exploring topics ranging from deliquescence to crispness, these insightful new inclusions complement existing content that has been refreshed and reconfigured to support the food industry of today.
This book explores examples of the circular economy in action. Unlike other books that provide narrow perceptions of wide-ranging and highly interconnected paradigms, such as supply chains, ...recycling, businesses models and waste management, this book provides a comprehensive overview of the circular economy from various perspectives. Its unique insights into the approaches, methods and tools that enable people to make the transformation to a circular economy show how recent research, trends and attitudes have moved beyond the "call to arms" approach to a level of maturity that requires sound scientific thinking.
The article introduces blue ecocriticism into Czech literary studies by reviewing Steve Mentz’s volume An Introduction to the Blue Humanities (2023). It briefly outlines the circumstances of the ...cultural turn to the seas and oceans around the year 2000 and its current shift from the Mediterranean and North Atlantic to the more global Pacific, as well as from the seas and oceans to the planetary water cycle. It will take a closer look at Mentz’s blue strategies, interpretations, inspirations, and problems, to conclude by considering the potential of blue ecocriticism for the (seemingly) landlocked Czech intellectual climate.
This paper presents research results of a Roman road on Mountain Konjuh (Bosnia and Herzegovina). It documents the remnants of road communications in modern settlements in Konjuh municipality. We ...documented the length of the discovered road sections (completely or partially preserved), their width, slope angle, embankment height, and stone type on the cleaned parts. According to the found remains, we concluded that this Roman road went from the direction of Olovo, and that it passed the Stara Karaula pass and over the slopes of Konjuh and then arrived at Kladanj. One leg of this road led from Kladanj through the settlements of Plahovići and Pauč to Pekara locality (today known as Muška voda), in the river valley of Drinjača River. We performed its georeferencing according to the found marks of the Roman road, recording them and studying the Austro-Hungarian maps.
Významnou část přepravních a skladovacích nádob tvořily v neolitu nádoby z organických materiálů. Používaly se k vytahování vody z jam nebo studní, zatímco keramické nádoby byly používány k přepravě, ...skladování a pití vody. Cílem tohoto článku je analýza a vyhodnocení unikátních dřevěných věder ze studny LBK v lokalitě Mohelnice – U Cukrovaru. Konstrukce věder se skládala z podélně dělených prutů se zářezy. Vrstva lýka tvořila stěnu vědra a konce rozštípnutých prutů se pak k sobě svázaly provázky. Textilně-technologický rozbor určil jako použitou surovinu s největší pravděpodobností lýko. Xylotomická analýza určila jako zdroj dřevo několika listnatých stromů. Obdobné nádoby byly nalezeny v několika studnách v Evropě, zejména v Sasku. Lze předpokládat, že organické nádoby tvořily standardní součást výbavy neolitické domácnosti.
Dobrá Voda village is located in the Malé Karpaty Mts. (Brezovské Karpaty) and is well known for its increased seismic activity. For a better understanding of the processes preceding earthquakes, ...this area has been studied using several methods. One of them is magnetotellurics. Magnetotellurics provides an image of the distribution of electrical conductivity within the Earth and helps to determine individual tectonic structures, specifically faults. The shallow conductive structures are associated with Neogene sediments of the Danube Basin, sedimentary fill of the Dobrá Voda Depression, and partial nappes of Hronicum, probably saturated with water. Less conductive structures are the Fatricum sediments and the lowest conductivity values belong to crystalline basement of the Tatricum tectonic unit. Whole structure of the Dobrá Voda seismoactive area along our magnetotelluric profile is disrupted by NE–SW oriented normal faults. Based on the location of earthquake hypocentres, we can identify main seismoactive areas as crystalline complexes of Tatricum.
Čedo Antolić, uvaženi kantautor duhovnih pjesama, rođen 1951. u Zagrebu, gdje je i umro 2019., kreće se unutar katoličkog religioznog vokabulara, ali ima osebujnu metaforiku. U njoj se ističe često ...spominjanje vode, i to u raznolikim vidovima – kao potok, rijeku, more, kišu, kap – i to unutar svoje tipične teme obraćanja Bogu, i u tom obraćanju razmatranja pitanja od egzistencijalne važnosti. Imaginarij Čede Antolića povezan s vodom veoma je bogat, a ovdje su analizirani neki njegovi vidovi, primjerice analogija između vode i svjetla, kao Božjeg atributa. Veoma je važno iskustvo vode kao medija očišćenja, koja to može biti bilo kao kiša što pada, bilo kao potok/rijeka u koju se ulazi, bilo kao more kojim se putuje. Voda se tako otvara u svojoj konotaciji u raznim smjerovima, pa je tako plodna metafora rijeke kao životnog puta i/ili protoka vremena, koja se može identificirati s cestom/ulicom. Niz metafora doseže na taj način alegorizaciju pa tako život (kao i rijeka ili cesta) ima početak čijoj se čistoći možemo pokušati vratiti, a ima i također i svoj kraj, kao ušće/smrt, odnosno susret s Bogom na kraju putovanja. Bog je istovremeno i prisutan i odsutan, on je i cilj i pratilac, dodir nadnaravnog u postojanju koje se nastoji transcendirati. Budući da je vjera istinita negdje drugdje, a u sadašnjem životu još nije ostvarena, putovanje se može shvatiti i kao lutanje, a voda ima negativne konotacije nečega što troši čovjeka ili ga pak odmiče od zajedništva s Bogom. Ulica, koja je zapravo rijeka, otkriva se dvostrukom ključu – ona je istovremeno mjesto lutanja za one koji ne poznaju Boga, kao i mjesto molitve za onoga koji ga poznaje; ona je i noć i dan – svijetla za one koji su u toj ulici kao u rijeci što ima siguran put, mračna za one koji taj put ne poznaju. Ta je ulica i mjesto u kojem pjesnik pjeva, pa se tako teme vode, života, vjere i umjetnosti povezuju.
Čedo Antolić, a respected singer-songwriter, born in 1951 in Zagreb, where he died in 2019, moves within the Catholic religious vocabulary, but has a distinctive metaphoric system. He emphasizes the frequent mention of water in various forms - such as a stream, river, sea, rain, drop - and within its typical theme of addressing God, and in that discusses issues of existential importance.
The imagery of Čedo Antolić related to water is very rich, and some of its aspects are analyzed here, for example the analogy between water and light, as an attribute of God. The experience of water as a medium of purification is very important, which can be presented either as rain that falls, or as a stream or river that is entered, or as the sea through which one travels. Fruitful metaphor of the river develops as a way of life or the flow of time, which can be identified with a road or street. A number of metaphors thus reach allegory, so that life - like a river or a road - has a beginning, which purity we can try to return to, and it also has its end, as estuary or death, when the poet is meeting God at the end of his journey.
God is both present and absent, he is both the goal and the companion; God is the touch of the supernatural in the existence, but existence also seeks to transcend life. Since faith is true elsewhere, and not yet realized in the present life, travel can also be understood as wandering, and water has negative connotations of something that consumes man or moves him away from communion with God. The street, which is actually a river, is at the same time a place of wandering for those who do not know God, as well as a place of prayer for one who knows him; it is both night and day - bright for those who are in that street, dark for those who do not know that path. The street - the river - is also the place where the poet sings, so the themes of water, life, religion and art are intertwined.
