scholarly journals Dual-faced borax mediated synthesis of self-healable hydrogels merging dynamic covalent bonding and micellization

2021 ◽  
Author(s):  
Xiaohui Li ◽  
Hatice Mutlu ◽  
Christian Fengler ◽  
Manfred Wilhelm ◽  
Patrick Theato
Keyword(s):  
Fatigue Property ◽  
Covalent Bonding ◽  
Boronate Ester ◽  
System P ◽  
Facile Route

A facile route towards multifunctional hydrogels was proposed via borax catalyzed thiol-acrylate and borax–diol chemistry. The hydrogels exhibited self-healable ability and anti-fatigue property by merging dynamic boronate ester bonds and micellization in one system.

Concentration-directed morphological evolution of boronate ester-based dynamic covalent nanoparticles: a facile approach for size and shape control

2018 ◽  
Vol 9 (7) ◽  
pp. 815-819 ◽  
Author(s):  
Fuli Zhao ◽  
Anjie Dong ◽  
Jinfeng Ma ◽  
Liandong Deng ◽  
Jianhua Zhang
Keyword(s):  
Shape Control ◽  
Morphological Evolution ◽  
Formation Processes ◽  
Boronate Ester ◽  
Size And Shape ◽  
Facile Route

Precursor concentrations dictated the formation processes of dynamic boronate nanoparticles, thus providing a facile route for morphological and size manipulation.

scholarly journals A Facile Route to Melaminophenyl Boronates using 2, 4-Diazido-6- Chloro-1, 3, 5-Triazine as an Electrophilic Reagent

2021 ◽  
pp. 1-6
Author(s):  
Claudius D' Silva
Keyword(s):  
Fluorescence Quenching ◽  
Nucleophilic Substitution ◽  
Ester Group ◽  
Electrophilic Reagent ◽  
Synthetic Methodology ◽  
Boronate Ester ◽  
Facile Route

We have synthesised a novel class of melaminyl derivative, containing a phenyl boronate or boronate ester group. The synthetic methodology employed was designed to be facile involving the use of 2, 4-diazido-6-chloro-1, 3, 5-triazine as an electrophilic reagent for nucleophilic substitution of chlorine with a weakly reactive amine. The reagent was chosen with a view to improve the organic solubility of the product and aid isolation by allowing the reaction to be followed by fluorescence quenching (Tlc, F234) and IR (the presence of two N3 peaks).

Comparison of TEM and STM observations of small silver clusters on different carbon supports

1990 ◽  
Vol 48 (4) ◽  
pp. 264-265
Author(s):  
Bernd Tesche ◽  
Tobias Schilling
Keyword(s):  
Vibration Isolation ◽  
Pyrolytic Graphite ◽  
Carbon Film ◽  
Silver Clusters ◽  
Carbon Supports ◽  
Stacking Order ◽  
System P ◽  
High Resolution Tem ◽  
High Degree ◽  
Degree Of Order

The objective of our work is to determine:a) whether both of the imaging methods (TEM, STM) yield comparable data andb) which method is better suited for a reliable structure analysis of microclusters smaller than 1.5 nm, where a deviation of the bulk structure is expected.The silver was evaporated in a bell-jar system (p 10−5 pa) and deposited onto a 6 nm thick amorphous carbon film and a freshly cleaved highly oriented pyrolytic graphite (HOPG).The average deposited Ag thickness is 0.1 nm, controlled by a quartz crystal microbalance at a deposition rate of 0.02 nm/sec. The high resolution TEM investigations (100 kV) were executed by a hollow-cone illumination (HCI). For the STM investigations a commercial STM was used. With special vibration isolation we achieved a resolution of 0.06 nm (inserted diffraction image in Fig. 1c). The carbon film shows the remarkable reduction in noise by using HCI (Fig. 1a). The HOPG substrate (Fig. 1b), cleaved in sheets thinner than 30 nm for the TEM investigations, shows the typical arrangement of a nearly perfect stacking order and varying degrees of rotational disorder (i.e. artificial single crystals). The STM image (Fig. 1c) demonstrates the high degree of order in HOPG with atomic resolution.

Conclusion: What is Speculative Empiricism?

2018 ◽  
Author(s):  
Didier Debaise
Keyword(s):  
Social Groups ◽  
Speculative Philosophy ◽  
System P ◽  
History Of ◽  
Selection Of

Process and Reality ends with a warning: ‘[t]he chief danger to philosophy is narrowness in the selection of evidence’ (PR, 337). Although this danger of narrowness might emerge from the ‘idiosyncrasies and timidities of particular authors, of particular social groups, of particular schools of thought, of particular epochs in the history of civilization’ (PR, 337), we should not be mistaken: it occurs within philosophy, in its activity, its method. And the fact that this issue arises at the end of Process and Reality reveals the ambition that has accompanied its composition: Whitehead has resisted this danger through the form and ambition of his speculative construction. The temptation of a narrowness in selection attempts to expel speculative philosophy at the same time as it haunts each part of its system.

Pedestrian Oriented Vehicular Collision Avoidance Support System: P-VCASS

2010 ◽  
Vol E93-A (4) ◽  
pp. 679-688 ◽  
Author(s):  
Tomotaka WADA ◽  
Yuki NAKANISHI ◽  
Ryohta YAMAGUCHI ◽  
Kazushi FUJIMOTO ◽  
Hiromi OKADA
Keyword(s):  
Collision Avoidance ◽  
Support System ◽  
System P

Temporal variability of disinfection by-products concentration in urban public water system

2013 ◽  
Vol 14 (4) ◽  
pp. 393-398
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Temporal Variability ◽  
Water System ◽  
The Other ◽  
Major Constituent ◽  
System P ◽  
Public Water System ◽  
Drinking Water Samples ◽  
By Products

The occurrence of trihalomethanes (THMs) was studied in the drinking water samples from urban water supply network of Karachi city that served more than 18 million people. Drinking water samples were collected from 58 locations in summer (May-August) and winter (November-February) seasons. The major constituent of THMs detected was chloroform in winter (92.34%) and summer (93.07%), while the other THMs determined at lower concentrations. Summer and winter concentrations of total THMs at places exceed the levels regulated by UEPA (80 μg l-1) and WHO (100 μg l-1). GIS linked temporal variability in two seasons showed significantly higher median concentration (2.5%-23.06%) of THMs compared to winter.

PERANGKAT KERAS ( HARDWARE ) PADA KOMPUTER

2020 ◽  
Author(s):  
Siti Kumala Dewi
Keyword(s):  
Processing System ◽  
Central Processing Unit ◽  
Input Device ◽  
Processing Unit ◽  
Central Processing ◽  
Output Device ◽  
System P ◽  
System 2

Perangkat keras komputer adalah bagian dari sistem komputer sebagai perangkat yang dapat diraba, dilihat secara fisik, dan bertindak untuk menjalankan instruksi dari perangkat lunak (software). Perangkat keras komputer juga disebut dengan hardware. Hardware berperan secara menyeluruh terhadap kinerja suatu sistem komputer. Berdasarkan fungsinya, perangkat keras terbagi menjadi :1.Sistem Perangkat Keras Masukan (Input Device System )2.Sistem Pemrosesan ( Central Processing System/ Central Processing Unit(CPU)3.Sistem Perangkat Keras Keluaran ( Output Device System )4.Sistem Perangkat Keras Tambahan (Peripheral/Accessories Device System)

Eco-friendly and fast bromination of industrially-important aromatic compounds in water using recyclable AlBr3-Br2 system

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Aromatic Compounds ◽  
Molecular Bromine ◽  
Economical Method ◽  
System P

A fast, efficient, simple, eco-friendly, regioselective, controllable and economical method for the bromination of aromatic compounds using AlBr3-Br2 system was invetigated. The direct bromination of anilines and phenols with molecular bromine in solution frequently results in polybromination, and when brominated in the existence of oxidants, they also get oxidized rather than experiencing substitutions and in some cases, require fortification of the amino (-NH2) group.

PIll Dispenser Alert System

2017 ◽  
Author(s):  
marco arambula
Keyword(s):  
Alert System ◽  
System P

A pill dispensing system that has an annoying alarm to make sure the user has to get up to take their pills

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