scholarly journals A Simple Halogen-Free Magnesium Electrolyte for Reversible Magnesium Deposition through Cosolvent Assistance

2020 ◽  
Vol 12 (9) ◽  
pp. 10252-10260 ◽  
Author(s):  
Shengqi Fan ◽  
Genevieve M. Asselin ◽  
Baofei Pan ◽  
Hao Wang ◽  
Yang Ren ◽  
...  
Keyword(s):  
Halogen Free ◽  
Free Magnesium

Polymerization catalysts for propene from the reduction of titanium tetrachloride with halogen-free magnesium alkyls

Polymer ◽  
1981 ◽  
Vol 22 (5) ◽  
pp. 667-672 ◽  
Author(s):  
John A Licchelli ◽  
Robert N Haward ◽  
Ian W Parsons ◽  
Anthony D Caunt
Keyword(s):  
Titanium Tetrachloride ◽  
Polymerization Catalysts ◽  
Halogen Free ◽  
Free Magnesium

THE X2BO and X2BS (X = HYDROGEN OR HALOGEN) FREE RADICALS

2014 ◽  
Author(s):  
Dennis Clouthier ◽  
Phillip Sheridan ◽  
Bing Jin ◽  
Robert Grimminger
Keyword(s):  
Free Radicals ◽  
Halogen Free

Conductive Filament Formation in Printed Circuit Boards – Effects of Reflow Conditions and Flame Retardants

2009 ◽  
Author(s):  
Bhanu Sood ◽  
Michael Pecht
Keyword(s):  
Flame Retardants ◽  
Printed Circuit Boards ◽  
Electrochemical Process ◽  
Lead Free ◽  
Circuit Boards ◽  
Filament Formation ◽  
Conductive Filament ◽  
Printed Circuit ◽  
Free Solder ◽  
Halogen Free

Abstract Failures in printed circuit boards account for a significant percentage of field returns in electronic products and systems. Conductive filament formation is an electrochemical process that requires the transport of a metal through or across a nonmetallic medium under the influence of an applied electric field. With the advent of lead-free initiatives, boards are being exposed to higher temperatures during lead-free solder processing. This can weaken the glass-fiber bonding, thus enhancing conductive filament formation. The effect of the inclusion of halogen-free flame retardants on conductive filament formation in printed circuit boards is also not completely understood. Previous studies, along with analysis and examinations conducted on printed circuit boards with failure sites that were due to conductive filament formation, have shown that the conductive path is typically formed along the delaminated fiber glass and epoxy resin interfaces. This paper is a result of a year-long study on the effects of reflow temperatures, halogen-free flame retardants, glass reinforcement weave style, and conductor spacing on times to failure due to conductive filament formation.

A Development of Virtual Manufacturing System for Magnesium High Pressure Die Casting Processes

Materials ◽  
2003 ◽  
Author(s):  
Weilong Chen
Keyword(s):  
High Pressure ◽  
Magnesium Alloys ◽  
Die Casting ◽  
Virtual Manufacturing ◽  
Mold Design ◽  
High Pressure Die Casting ◽  
Molten Magnesium ◽  
Pressure Die Casting ◽  
Soft And Hardware ◽  
Free Magnesium

In recent years, high-pressure die-casting magnesium components have been gaining currency worldwide because of the excellent properties that magnesium alloys can offer to meet new product requirements. With the increasing application of magnesium parts worldwide, many research and development projects have been carried out to advance HPDC technology. However, truly optimized mold design and production of defect free castings remains a challenge for die casters. For many HPDC magnesium products, especially those specified for porosity-free and high cosmetic requirement, the challenge not only comes form a lack of a deeper understanding of how molten magnesium alloys fill the mold cavity and form defects, but also from improper preliminary part design. This study proposes a virtual prototyping system that integrates several effective soft and hardware tools for both the part and mold-design engineer to evaluate part manufacturability. Also, investigated in this study are the major causes of those defects that are the predominant cause of rejection of thin walled, leak-free magnesium parts requiring highly cosmetic finishes.

High performance inkjet-printed QLEDs with 18.3% EQE: improving interfacial contact by novel halogen-free binary solvent system

Nano Research ◽  
2021 ◽  
Author(s):  
Ming Chen ◽  
Liming Xie ◽  
Changting Wei ◽  
Yuan-Qiu-Qiang Yi ◽  
Xiaolian Chen ◽  
...  
Keyword(s):  
High Performance ◽  
Solvent System ◽  
Binary Solvent ◽  
Interfacial Contact ◽  
Halogen Free

Treating octasilanol [Si8O12][OH]8 with tetramethoxysilane and trimethoxyvinylsilane: a halogen-free synthetic route to alkoxysilyl-substituted double-four-ring siloxanes

2021 ◽  
Vol 50 (5) ◽  
pp. 1594-1598
Author(s):  
Takeshi Nozawa ◽  
Toshiaki Kobayashi ◽  
Tomohiro Matsumoto ◽  
Fujio Yagihashi ◽  
Kazuhiko Sato ◽  
...  
Keyword(s):  
Synthetic Route ◽  
Halogen Free

A halogen-free synthesis of methoxysilyl-substituted double-four-ring (D4R) siloxanes [Si8O12][OSiR(OMe)2] (R = OMe or vinyl) was accomplished.

From photosensitizers to light harvesters adapting the molecular structure in all-BODIPY assemblies

2021 ◽  
Author(s):  
Edurne Avellanal Zaballa ◽  
Alejandro Prieto ◽  
Carolina Diaz Norambuena ◽  
Jorge Bañuelos ◽  
Antonia R Agarrabeitia ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Energy Transfer ◽  
Singlet Oxygen ◽  
Halogen Free

Herein we detail a protocol to design dyads and triads based solely on BODIPY dyes as halogen-free singlet oxygen photosensitizers or energy transfer molecular cassettes. The conducted photonic characterization reveals...

scholarly journals Magnesium Signaling in Plants

2021 ◽  
Vol 22 (3) ◽  
pp. 1159
Author(s):  
Leszek A. Kleczkowski ◽  
Abir U. Igamberdiev
Keyword(s):  
Equilibrium Constant ◽  
Adenylate Kinase ◽  
Nucleoside Diphosphate Kinase ◽  
Phloem Loading ◽  
Photosynthetic Performance ◽  
Fine Tuning ◽  
Primary Control ◽  
Membrane Bound ◽  
Free Magnesium ◽  
Apparent Equilibrium

Free magnesium (Mg2+) is a signal of the adenylate (ATP+ADP+AMP) status in the cells. It results from the equilibrium of adenylate kinase (AK), which uses Mg-chelated and Mg-free adenylates as substrates in both directions of its reaction. The AK-mediated primary control of intracellular [Mg2+] is finely interwoven with the operation of membrane-bound adenylate- and Mg2+-translocators, which in a given compartment control the supply of free adenylates and Mg2+ for the AK-mediated equilibration. As a result, [Mg2+] itself varies both between and within the compartments, depending on their energetic status and environmental clues. Other key nucleotide-utilizing/producing enzymes (e.g., nucleoside diphosphate kinase) may also be involved in fine-tuning of the intracellular [Mg2+]. Changes in [Mg2+] regulate activities of myriads of Mg-utilizing/requiring enzymes, affecting metabolism under both normal and stress conditions, and impacting photosynthetic performance, respiration, phloem loading and other processes. In compartments controlled by AK equilibrium (cytosol, chloroplasts, mitochondria, nucleus), the intracellular [Mg2+] can be calculated from total adenylate contents, based on the dependence of the apparent equilibrium constant of AK on [Mg2+]. Magnesium signaling, reflecting cellular adenylate status, is likely widespread in all eukaryotic and prokaryotic organisms, due simply to the omnipresent nature of AK and to its involvement in adenylate equilibration.

scholarly journals Stacking-fault mediated plasticity and strengthening in lean, rare-earth free magnesium alloys

2021 ◽  
pp. 116877
Author(s):  
I. Basu ◽  
M. Chen ◽  
J. Wheeler ◽  
R.E. Schäublin ◽  
J.F. Löffler
Keyword(s):  
Rare Earth ◽  
Magnesium Alloys ◽  
Stacking Fault ◽  
Free Magnesium

Significantly Boosting Efficiency of Polymer Solar Cells by Employing a Nontoxic Halogen-Free Additive

2021 ◽  
Vol 13 (9) ◽  
pp. 11117-11124 ◽  
Author(s):  
Xingpeng Liu ◽  
Ruijie Ma ◽  
Yufei Wang ◽  
Sanshan Du ◽  
Junfeng Tong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Polymer Solar Cells ◽  
Halogen Free
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