#needleless

[wtf-fun-factss]

Researchers are investigating a voice test for diabetes. Click to read the full fact.

[qingzinano]

MAGNETIC FLUID

In 2004, Yarin and Zussman reported a needle-less electrospinning system that used a magnetic field to initiate the jet formation. The setup comprised a bottom layer of ferromagnetic fluid and an upper layer of polymer solution (Fig. 7.4A). When an external magnetic field was applied to the fluid system and an electric field was added simultaneously to the polymer solution layer, the ferromagnetic fluid triggered the formation of steady vertical spikes, which perturbed at the interlayer interface. Under the action of a strong electric field, these spikes were drawn into fine solution jets (Fig. 7.4B). Compared with multineedle electrospinning, this needle-less setup can produce polyethylene oxide (PEO) nanofibers with 12 times higher productivity. Nevertheless, the nanofibers electrospun are relatively coarser with larger diameter distribution.

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[qingzinano]

CENTRIFUGAL FORCE

Using PEO as a model polymer, Peterson et al. produced nanofibers at a production rate of 6.5 mg/h cm2(Fig. 7.19). Important parameters that affect the nanofiber production rate include voltage, spinneret rotation speed, solution feed rate, distance between spinning head and collector, and solution concentration. In this way, polyacrylonitrile fibers were produced successfully. This technique is also compatible with various collectors, such as a moving belt for collecting large membranes, parallel collector electrodes for aligned fibers, and parallel collector electrodes with one rotating electrode for producing short yarns.

[vishmall-blog]

Our needleless laser acupuncture pen uses a fusion of biotechnology, massage, and acupuncture to promote relaxation and healthy circulation. Use the pen to gently shock specific pressure points to help with muscle relaxation or stimulation as well as cure minor ailments, such as hiccups, trouble sleeping, and minor aches and pain.

This Laser Acupuncture pen is a painless, acupuncture-type stimulation which uses an electric pulse to activate tissues, firm sagging and aging skin, promote healthy blood circulation, detox the meridians and help to reduce muscle pain!

Fear no more and try the energy acupuncture pen instead! 

Needleless Acupuncture- There are no needles involved, so there is no skin piercing. Simply press the pen to the affected areas and it will release an electric pulse to stimulate the meridian and acupuncture points in your body for healing and pain relief.

Alternative Treatment- The Electronic Acupuncture Pen has no side effects, unlike medicated painkillers and other drugs used to treat chronic pain. It’s great for treating acute and chronic physical pain caused by arthritis, rheumatism, osteoporosis, sciatica, migraine, sports injuries and muscle, joint and back pains.

Easy To Use- The Electronic Acupuncture Pen only needs One AA Battery (not included) to function.  It has a digital display that shows the strength of the electrical pulse output (0 - weakest and 9 - strongest). Simply press the start button to increase or decrease the strength of the electric pulse.

Features Two Special Functions- The Dome Head is superficial therapy, applicable for health care and facial beautification, while the Spheroidal Head is partial therapy, applicable for quickly alleviating pain.

Portable Pain Reliever- The Electronic Acupuncture Pen is lightweight and fits easily in your pocket, bag or pouch. Use it while traveling or just for a long day at work, where you'll need relief from your pain. 

[qingzinano]

A SUMMARY OF NEEDLE-LESS ELECTROSPINNING SPINNERETS

Moreover, asymmetrical spinnerets, such as a coil (Fig. 7.18), could also produce uniform nano- fibers and nanofiber mats. Unlike the symmetrical spinnerets, the coil spinneret shows an uneven electric field distribution.

[qingzinano]

WIRE SPINNERETS

During the electrospinning process, the high voltage was applied to the stationary wires and a polymer solution was loaded on the surface of the wires by moving the wire through the polymer solution. Then, numerous jets were generated from the wire surface. It has a better spinning performance than the previous version, which use a rotating drum as spinneret.

[qingzinano]

CLEFT SPINNERET

Lukas et al. reported an electrospinning setup that used linear clefts as the spinneret (Fig. 7.6). The authors also developed a one-dimensional electrohydrodynamic theory to explain the process of electrospinning conductive liquids from an open plane surface (Fig. 7.6). During the electrospinning process, the amplitude of characteristic wavelength grew faster because of the electrical force. The fastest-growing stationary wave marked the onset of electrospinning from a free liquid surface. This theory not only predicated the critical value of the electrospinning process but also explained the upward needle-less electrospinning.