Organic - Science topic

O presente artigo tem por objetivo levantar o estado da arte sobre Inovação Tecnológica e/ou de Processos com foco na Agricultura Orgânica, por meio de uma revisão sistemática de literatura (RSL), classificada como exploratória, descritiva e com abordagem qualitativa. Para tal intento, foi utilizado o protocolo descrito por Cronin et al. (2008). Ap...

Alkenylboronates are highly versatile building blocks and valuable reagents in the synthesis of complex molecules. Compared with that of monosubstituted alkenylboronates, the synthesis of multisubstituted alkenylboronates is challenging. The copper‐catalyzed carboboration of alkynes is an operationally simple and straightforward method for synthesi...

In a recent study by Angst et al. (2023) (DOI: org/10.1038/s41467-023-38700-5) , particulate organic matter was emphasized to increase carbon (C) sequestration under conditions where C is saturated in mineral associated organic matter. They mainly consider soil minerals as binding agents to associate with OM, but overlooking the dynamic nature and...

This research aims to explore the functional characteristics of Augmented Reality (AR) supported teaching in secondary chemistry learning, based on the theoretical framework of AR research in science education proposed by (JSET 22:449-462, 2013). Grounded theory and interview were used to construct AR related functional models. In the study, pre-se...

Anti-Kasha’s process in organic luminogens has attracted many attentions since its discovery. However, only limited examples of anti-Kasha’s rule have been reported and anti-Kasha triplet energy transfer (ET) is even less-touched. Benefiting from anti-Kasha’s rule, this work provided an efficient strategy to realize excitation wavelength dependent...

Cyclopropanes are of great synthetic value in heterocyclic chemistry due to their highly reactive nature. They are widely employed to synthesize various biologically active organic compounds. Generally, vinyl, carbonyl, imine, and alkylidene cyclopropanes are utilized as efficient synthetic precursors in organic synthesis. The Cloke-Wilson rearrang...

“Green” strategies to build up novel organic nanocarriers with bioperformance are modern trends in nanotechnology. In this way, the valorization of bio-wastes and the use of living systems to develop multifunctional organic and biogenic nanocarriers (OBNs) have revolutionized the nanotechnological and biomedical fields. This paper is a comprehensiv...

This paper tries to formulate the paradox of organic solidarity more precisely and propose a solution.

Under the background of the new era, the curriculum reform of ideological and political theory courses in colleges and universities is urgent Life-oriented teaching method is based on students’ daily life experience and focuses on heuristic teaching. It is a feasible path to reform ideological and political courses. Through a literature review, thi...

Solution‐processed hole transporting layers (HTLs) not only play a crucial role in realizing high performance of organic solar cells (OSCs), but also possess excellent compatibility with low‐cost and large‐area processing methods of industrialized productions. However, the number and species of HTL materials are obviously fewer than that of electro...

Animal-free organic agriculture resides at the margins of sustainable agriculture discourse, practice, and imaginaries, which center animal-based forms of farming. However, the concerns and goals of sustainable agriculture are overwhelmingly consistent with those of many forms of animal-free organic agriculture (AFOA), described as organic farming...

Soluble organic molecules with diverse and highly tunable structures are receiving more and more attention as redox‐active materials for aqueous organic flow batteries (AOFBs). However, the undesirable parasitic reactions of redox‐active molecules restrict their practical application. Herein, a general molecular stabilization strategy is proposed b...

Rice is an important staple crop influenced by rising CO2 and related climate change, but it is not well-known how N-fixing Azotobacter affects rice growth and yield under different CO2 concentrations. This study aimed to determine the effects of Azotobacter strains on the growth and yield of rice plants grown in two paddy soils under varying CO2 c...

Organic and Natural Farming: Opportunities and Challenges for Northeast India

Electroactive organic materials have received much attention as alternative electrodes for metal-ion batteries due to their high theoretical capacity, resource availability, and environmental friendliness. In particular, redox-active covalent organic frameworks (COFs) have recently emerged as promising electrodes due to their tunable electrochemica...

CONTEXT In the midst of the growing popularity of organic farming, persistent questions surround its environmental effects. A 2017 meta-analysis suggested elevated acidification and eutrophication potentials per land area for organic farming relative to conventional farming, influencing policy and individual choices. However, a recent 2023 meta-ana...

A strategy is presented for variational orbital optimization in time-independent calculations of excited electronic states. The approach involves minimizing the energy while constraining specific degrees of freedom corresponding to negative curvature on the electronic energy surface, followed by a fully unconstrained saddle point search. Both steps...

Due to the electronic configuration of the atom and charge of the nucleus, the chlorine in organic molecules can exert a variety of effects. It can depart as a chloride anion in the process of substitution and elimination, facilitates the abstraction of protons and stabilizes generated carbanions, exerts moderate stabilizing effect of carbenes, car...

Microencapsulation is the process of encapsulating one material entirely within another on a very small scale, resulting in capsules ranging in size from less than 1-100. The encapsulation efficiency of the microcapsule is affected by various aspects such as polymer concentration, polymer solubility in solvent, solvent removal rate, organic solvent...

We show that isoacenofurans of any size possess smaller HOMO-LUMO gaps than the corresponding acene bearing an isoelectronic p-system (i.e., the same total number of rings). Large isoacenofurans show limited stability due in part to the highly reactive 1,3-carbons of the furan ring. Placing sterically congesting phenyl substituents bearing ortho al...

Chemical reactions are the fundamental building blocks of drug design and organic chemistry research. In recent years, there has been a growing need for a large-scale deep-learning framework that can efficiently capture the basic rules of chemical reactions. In this paper, we have proposed a unified framework that addresses both the reaction-repres...

Assessment of the environmental impact of organic chemicals has become an important subject in chemical science. Efficient quantitative descriptors of their impact are their partition coefficients logPow, logKoa and logKaw. We present a group-additivity method that has proven its versatility for the reliable prediction of many other molecular descr...

zet Biyolojik manada ki "organik" evrim düşüncesi genellikle Darwin'in "Türlerin Kökeni" adlı kitabına dayandırılmaktadır. Kitabın adından da anlaşılabileceği gibi burada önemli olan Türlerin nereden ve nasıl köken aldığıdır. Bu köken için Darwin: "Yaradanın başlangıçta bütün özünü birkaç ya da bir biçime üfürdüğü yaşam"* demektedir. Şüphesiz günüm...

Domestic waste is waste that comes from human daily activities in the household which does not include feces and specific waste. Domestic waste is divided into two based on its nature, namely organic waste and anorganic waste. The purpose of this study was to determine the comparison of the amount of domestic waste produced by 5th semester students...

With the ever-increasing scope of organocuprates, a well-established Gilman reagent has been considered as an unprecedented synthetic tool in modern organic chemistry. The broad research profile of the Gilman reagent (R2CuLi in THF or Et2O) is owing to its propensity to carry out three kinds of reactions, i.e., epoxide ring opening reactions, 1,4-c...

3-aroylimidazo[1,2-a]pyridines represent a class of derivatives in the imidazo[1,2-a]pyridine family known for their important biological and pharmaceutical activities. Consequently, various methodologies have been designed to simplify the synthesis of this structure, with an emphasis on the use of cost-effective starting materials and environmenta...

Penanggungan Village is an area that has quite good potential in the tourism sector due to geographical location that in the highlands and has beautiful scenery view. Penanggungan village is famous as Brenjonk organic village and Wisata Agro Lembah Kecubung as a tourism icon.Wisata Agro Lembah Kecubung is just been formed and does not have strong b...

У статті досліджено сучасний стан фінансування вищих аграрних навчальних закладів із державного бюджету. Обґрунтовано необхідність підвищення інноваційної діяльності вищих аграрних навчальних закладів. Визначено перспективні напрями інноваційних систем і технологій з урахуванням ресурсозберігаючої складової. Запропоновано використання альтернативни...

Teething has been attributed to various childhood ailments and physical disturbances since ancient times. Due to this some of the organic childhood diseases may go untreated thereby harming the child's general health. Taking this negative impact into account, this review article aims at informing the medical community of the systemic symptoms that...

In the 1990's landfill gas was a promising fuel derived from the then-common practice of landfilling organic wastes. The paper looks at the opportunities of using landfill gas as a fuel in boilers, cement kilns and spark ignition gas engines to provide energy as heat and electricity and the specific issues associated with a landfill site.

One-pot reactions offer advantages like easy automation, higher product yields, minimal waste generation, operational simplicity, and thus reduced cost, time and energy. This review presents a comprehensive overview of one-pot reactions including triethyl orthoformate and amines as valuable and efficient reagents for carrying out two-, three- or fo...

In recent time, Organic Solar Cells (OSCs) have made a great progress in pursuing high power conversion, reaching the application threshold. Researchers have advanced past basic concepts of charge carrier dynamics in organic semiconductors to create devices with an experimental power conversion efficiency of about 18%. This review highlights the pr...

Four decades have elapsed since the first quasiperiodic crystal was discovered in the Al–Mn alloy system, and much progress has been made during this time on the science of quasicrystals (QCs). Notwithstanding this, a significant number of open questions still remain regarding both fundamental and technological aspects. For instance: What are QCs g...

El propósito de mi trabajo investigativo es realizar un análisis crítico sobre la producción científica en evaluación educativa, a fin de comprender su producción teórica, conceptual y metodológica, la visión de evaluación y ciencia que predomina y los aportes a la ciencia en el contexto de América Latina, Colombia y Europa (especialmente España),...

Accurate determination of intermolecular non-covalent-bonded or non-bonded interactions is the key to potentially useful molecular dynamics simulations of polymer systems. However, it is challenging to balance both the accuracy and computational cost in force field modelling. One of the main difficulties is properly representing the calculated ener...

Functional properties of organic semiconductors are defined by the interplay between optically bright and dark states. Organic devices require rapid conversion between these bright and dark manifolds for maximum efficiency, and one way to achieve this is through multiexciton generation (S1→¹TT). The dark state ¹TT is typically generated from bright...

MFCs (Microbial Fuel Cell) are bio-electrochemical devices that use microorganisms as biocatalysts to transform the chemical energy found in organic or inorganic compounds into electric currents. However, one of the limitations of this technology in terms of practical application is its lower electric efficiency, which greatly depends on the select...

Mental disorders are more common in cancer patients than other somatic diseases, which reduces their flexibility and the quality of rehabilitation. The article describes the clinical characteristics of mental disorders in patients with various oncological diseases (lung, gastrointestinal tract cancer).

Hydrogen atom transfer (HAT) and photoredox dual catalysis provides a unique opportunity in organic synthesis, enabling the direct activation of C/Si/S–H bonds. However, the activation of O–H bonds of β,γ-unsaturated oximes poses a challenge due to their relatively high redox potential, which exceeds the oxidizing capacity of most currently develop...

Desa-desa dalam lingkar kampus Universitas Bangka Belitung masih merupakan desa yang mempunyai basis pertanian, termasuk desa Pagarawan. Kemampuan desa sebagai penyangga kebutuhan sayuran kota pangkalpinang dan sekitarnya membuktikan adanya potensi desa yang potensial untuk dikembangkan dan selalu terjaga sumberdaya pendukungnya. Perlu upaya pendid...

Autoxidation of aldehydes to peracids and carboxylic acids holds a significant impact in both academia and industry due to their wide applications in organic synthesis and environmental remediation. However, the...

The requirements for drilling bentonites are tightening due to ever-increasing demands for petroleum resources, coupled with cost and reaction technology constraints. In addition to raising the risk of drilling, bentonite’s poor performance also raises the possibility of safety incidents and significant financial losses. Organically modified benton...

Organic transistors possess inherent advantages such as flexibility, biocompatibility, customizable chemical structures, solution‐processability, and amplifying capabilities, making them highly promising for portable healthcare sensor applications. Through convenient and diverse modifications at the material and device surfaces or interfaces, organ...

Description of methods enabling: determining the longitudinal dispersion factor, study of adsorption balance and kinetics of adsorption of metals on mineral material, study of Inhibition of the biochemical oxidation process of natural organic substances

Pembangunan pertanian ke depan diarahkan pengembangan green economy melalui pertanian organik. Kelompok tani berperan penting dalam upaya pengembangan pertanian organik yakni Wahana pembelajaran dengan penerapan saran produksi dan strategi pemasaran pertanian, unit produksi dengan menerapkan teknologi dan strategi pemasaran pertanian, serta wadah k...

The heterogenization of molecular catalysts within a porous solid acting as macroligand can advantageously open access to enhanced stability and productivity, and thus to more sustainable catalytic process. Herein, a porous organic polymer (POP) made through metal‐free polymerization using bipyridine repeating units is reported. This N‐rich POP is...

Ushbu maqolada mamlakatimizda sellyuloza erituvchilar qanday ta’sir ko‘rsatishi, qaysi erituvchilar sellyulozaga qanday ta’sir qilishi, bu borada qilingan ishlar, eng samarali va havfsiz bo‘lgan erituvchilarni aniqlash va qo‘llash yo‘llari, sellyuloza eng keng tarqalgan turi ekanligi, sellyuloza β – glyukopiranozadan tashkil topganligi, sellyuloza...

Evolution of Local Organic market in México and the results of the PGS

The plant Ziziphus jujuba was popularly called “chilonjiida” or “unabi” and has long been used in folk medicine. It is nutritious, high-calorie and healing. The article describes the history of the origin of unabi, its healing properties, composition, application in folk and traditional medicine, as well as the results of the research

The project focus was on the implementation of self-assessment in undergraduate chemistry labs to improve student comprehension of practical laboratory skills. During 2nd year undergraduate practical organic lab sessions, students were asked to engage in critical self-assessment and reflection of their practical activities. Currently, assessment of...

Despite the growing interest in dynamic behaviors at the frequency domain, there exist very few studies on molecular orientation-dependent transient responses of organic mixed ionic–electronic conductors. In this research, we investigated the effect of ion injection directionality on transient electrochemical transistor behaviors by developing a mo...

ABSTRAKTanah yang kurang sehat disebabkan penggunaan pupuk kimia yang berlebihan. Hal ini mengakibatkan tanaman tidak dapat tumbuh dan berproduksi optimal, sehingga perlu diimbangi dengan pemberian bahan organik. Tujuan penelitian ini mengkaji pengaruh pupuk kandang dan pupuk bakteri fotosintesis terhadap pertumbuhan dan hasil tanaman kale. Penelit...

We theoretically investigate superconductivity under a spin-split band structure owing to a collinear-type antiferromagnetic order in quasi-two-dimensional organic compounds κ-(BEDT-TTF)2X. We find that the magnetic order can induce a Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state, where the Cooper pair possesses a finite center-of-mass momentum. We...

The James Webb Space Telescope (JWST) has begun its scientific mission, which includes the atmospheric characterization of transiting exoplanets. Some of the first exoplanets to be observed by JWST have equilibrium temperatures below 1,000 K, which is a regime where photochemical hazes are expected to form. The optical properties of these hazes, wh...

The term “100%” represents perfection. Thus, it is not surprising that marketers believe that claims that contain this term (e.g., “100% organic”) can make products more appealing. This intuition is reflected in the extensive use of 100% claims to describe products' qualities. We discuss how the term 100% can be used to create a claim about perfect...

Current Li battery technology employs graphite anode and flammable organic liquid electrolytes. Thus, the current Li battery is always facing the problems of low energy density and safety. Additionally, the sustainable supply of Li due to the scarce abundance of Li sources is another problem. An all-solid-state Mg battery is expected to solve the p...

The discontent with the undemocratic agricultural food system inspired the emergence of many alternative agri-food systems, including organic agriculture. This study analysed how organic agriculture promotes agri-food system democracy concerning traditional knowledge integration, community and women participation, market, and policy integration. Th...

Hygh temperature degasification of organic wastes to Hydrogen, using steel mill dust as catalyzer

A city can be characterised as a measurable pattern that comprises streets surrounded by block patterns. These street patterns are largely responsible for connectivity and accessibility, which enable people to move and interact. The study compares four samples in a case study in Baghdad, Iraq. The assets of Baghdad today belong to its historical pe...

The rapid development of technology in the world of education has many positive impacts, namely facilitating the learning process. Technological sophistication can be felt, one of which is augmented reality. This Augmented Reality concept collaborates the real world with the virtual world which can display more detailed information in 3D visuals. T...

Organic light-emitting diodes (OLEDs) have emerged as a promising technology for various applications owing to their advantages, including low-cost fabrication, flexibility, and compatibility. However, a limited lifetime hinders the practical application of OLEDs in electronic devices. OLEDs are prone to degradation effects during operation, result...

Salah satu output dari Pembangkit Listrik Tenaga Panas Bumi yang karakteristik reservoirnya dominasi cair adalah fluida brine yang akan diinjeksi lagi menuju reservoir. Namun temperature fluida brine masih cukup tinggi dan dapat digunakan sebagai sumber panas pada sistem SRO / siklus rankine organik. Disamping itu, fluida brine mempunyai kandungan...