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Is It Time for an Additive Manufacturing Specialist in the Army Ordnance Corps?

Saturday, February 13th, 2021

FORT RILEY, Kan. – The Army supply chain of the future will incorporate additive manufacturing (AM), most commonly found in the form of 3D printing, to increase readiness. Using this technology at the point of need will reduce costs and increase unit mission capability.

The U.S. Army Ordnance Corps is in an excellent position to embrace this emerging technology, and ultimately, enhance Army lethality by developing Soldier expertise to support additive manufacturing programs.

Under the Combat Capabilities Development Command, the Expeditionary Lab of the U.S. Army’s Rapid Equipping Force, or Ex Lab for short, operated 3D printers in deployed environments for nearly ten years, expediting the repair of equipment in combat areas.

In 2019, the Army established the Additive Manufacturing Center of Excellence as a hub for developing processes and standards to field additive manufacturing capabilities across the Army supply chain. The Army also invested in developing the materials needed to support future requirements and overcome current limitations.

Scientists at the ARL are working to develop filaments that are mechanically strong but useable in low-cost 3D printers. Using a combination of plastic polymers in a unique geometry, the ARL hopes to allow printing for a wider range of parts with samples scheduled for distribution and testing in the near future.

Field results are promising, and demonstrate maintenance units in the future will be able to make repairs in hours, develop custom solutions to complex problems, or reduce the on-hand stock and logistical requirements to support an expeditionary fighting force.

AM exhibited limited success in creating hard to find parts, manufacturing parts for legacy systems, and at the small unit level, printing 3D aids for explosive ordnance disposal training.

In the future, the technology could be migrated to the tactical level with teams of engineers and Soldiers collaborating to produce designs allowing the manufacture of physical solutions near the point of need.

But what if the expertise to design and print parts was staged closer to the point of manufacture? Current Army programs rely on engineers’ and scientists’ expertise to be effective. Few studies have been done on how the processes being developed will translate at a larger scale in an austere environment.

Existing programs rely on connectivity between engineers and Soldiers who could be thousands of miles apart. This connectivity is far from guaranteed on future battlefields. Therefore, complex post-processing requirements or more in-depth material knowledge may be necessary to operate independently from industries’ existing infrastructure.

The Ordnance Corps has an opportunity to build Soldier expertise to support these future programs. However, the expertise required to perfect these processes and provide a rapid, flexible and reliable supply of parts to tomorrow’s front lines could quickly overwhelm a Soldier’s current ability to take on additional training and tasks.

According to Col. Ken Letcher, former commander of the Joint Manufacturing and Technology Center at Rock Island Arsenal, “The Army is heavily invested in 3D printing, ensuring Soldiers have the capability to print and fabricate repair parts as a component of the Battlefield Damage Assessment and Repair (BDAR) process.”

As the current director of CASCOM’s Fielded Force Integration Directorate, Letcher noted that “Printing at the point of need increases operational readiness. Not only must the Ordnance Corps advance its materiel solutions, but it must advance the Soldiers that apply these solutions as they are fielded.”

By focusing on additive manufacturing as a specialty, Soldiers could receive training in computer-aided design software and materials science, allowing them to develop new parts and solutions independently from the industry support the Army currently relies on and move the point of design nearer to the end-user.

The Additive Manufacturing Specialists could be trained in various technologies, allowing future Army initiatives to leverage more specialized manufacturing techniques such as powder bed fusion, vat polymerization and bio-printing.

Teams of these newly created experts could also see expansion into a variety of Army missions beyond logistics. In 2018, the Marine Corps began experimenting with printing in concrete to rapidly build barracks in a combat environment with possible future applications in force protection, base infrastructure, and the support of humanitarian and disaster relief missions.

A joint study between the Geneva Foundation and the U.S. Military Academy saw success in bio-printing in austere environments, allowing treatments customized to the Soldier near the point of injury. As the technology expands across the Army, the need for professionals to advise and assist in its application will only increase.

Throughout history, the Ordnance Corps has developed cutting-edge professionals to build and preserve Army readiness. Currently the Allied Trades Warrant Officer (914A) serves as the Army’s AM expert. However, creating an Ordnance enlisted specialty to complement the rapidly expanding use of additive manufacturing would keep the Army at the forefront of innovation.

Integrating this technology into the Army structure and doctrine will allow the maximum flexibility in using new and emerging technologies as they transcend from laboratories to battlefields of the future.

By 1LT Joshua S. Closson

First Multi-Domain Task Force Plans to be Centerpiece of Army Modernization

Wednesday, February 10th, 2021

WASHINGTON — The Army’s first Multi-Domain Task Force is charting an unknown path to help reshape how the total force fights and wins on future battlefields, its commander said Wednesday.

Initiated in March 2017, the MDTF pilot program focused on defeating an enemy’s anti-access/area denial, or A2/AD, capabilities in the Indo-Pacific region. Since then, through exercises and assessments, the program ensured the task force was able to deploy and operate in the region before it officially activated in the fall.

“There is little doctrine for [MDTFs],” said Brig. Gen. Jim Isenhower, the commander, adding his trailblazing unit will be a centerpiece of Army modernization.

As a centerpiece for the future Army, MDTFs are “new, networked, maneuver theater assets, focused on adversary A2/AD networks,” Isenhower said. Their capabilities also provide deterrence options for combatant commanders.

“The Army has empowered us, and asked us to figure out how we’re going to maneuver effectively in all domains, which will characterize how we fight in the future,” he added.

Down the road, the MDTF, which is based at Joint Base Lewis-McChord, Washington, won’t be alone. Later this year, a second MDTF is being planned to stand up in Europe. A third task force may also stand up and serve the Indo-Pacific next year.

The first MDTF originally had a field artillery brigade as its core that merged with an Intelligence, Information, Cyber, Electronic Warfare and Space, or I2CEWS, element.

“Through distributed operations and with access to requisite authorities, MDTFs are advanced headquarters that synchronize kinetic and non-kinetic capabilities in support of strategic objectives,” Isenhower said.

“We face increased physical and virtual standoff through layered and integrated networks, where adversaries leverage all instruments of national power to blur the lines between competition and conflict, altering international norms to the detriment of the international community,” he said.

Great power competition

For the MDTFs, the plan ahead is to evolve and outpace the speed of any persistent, great power competitors like China and Russia, said an officer assigned to the task force.

“Great power competition requires an Army that is capable of complete integration across the joint force to compete with our adversaries,” he said.

From a joint warfare perspective, this is where the MDTF comes in. “Our exercises are joint, our plans are joint, and we incorporate input from across the joint services at every turn,” he said.

That foundation enables the total force to use a broad range of multidisciplinary capabilities. It also gives joint forces the freedom of action to fit the needs of each service, he said.

Preparing Soldiers

Like with other Army organizations, it’s the individuals selected who make the task force exceptional, according to one of its senior enlisted members.

“Within our ranks are highly-trained Soldiers with specialized skill sets, [and are] technologically astute, creative thinkers, who are looking at new ways to address complex problem sets,” they said. “The diversity of our formation fosters an environment of critical thinking, and the Soldiers who comprise our task force are leaders at the front of their career fields.”

The MDTF Soldiers reflect the nation, he added, and are “the best at coming together to leverage technology and joint resources to meet the imperatives of our national defense strategy.”

After qualifying for the task force, they said, each member represents the best of each priority they specialize in. “That’s one of the most exciting parts of this — the Soldiers who comprise our organization,” he said.

Whether in exercise or garrison, the MDTF members do things others simply cannot, they said. Specifically, the experience of working in joint exercises, or becoming fluent in the synchronization and planning efforts typically linked to the joint environment.

“Every member on the MDTF values their opportunity to contribute to the Army’s — and the joint force’s — efforts to develop these new concepts, like [multi-domain operations] and all-domain warfare,” Isenhower said.

Joint problems need joint solutions

But the task force will only be as successful as the joint partnerships they maintain, they said. Those partnerships have come with their share of eye-openers.

“Our proximity to joint partners [has given us] a few lessons learned,” said a senior officer assigned to the task force. “We tend to get these large gains out of exercises that we’ve been on in the Pacific, but one of those lessons we were coming away with is that we need a more persistent training environment.”

On any given week, the MDTF may partner alongside a Carrier Strike Group from the U.S. Navy or fire planners from the U.S. Air Force.

These are prime examples of how the task force is a joint-enabler, and “without those joint partners, we’d become an Army solution [for] only Army problems,” the officer said. Instead, “we’re looking to work [with] joint partners toward joint solutions.”

“Many times, joint solutions are inhibited by closed architectures within respective forces, Isenhower said.

The task force “found opportunities to accelerate joint interoperability by just getting the right people in the room to talk to each other and figure out how to break down both literal and figurative firewalls that might inhibit rapid communication,” he said.

Although there is still work to do, the task force is on the right track, he said. MDTFs will simultaneously integrate joint partners and emerging technologies to inform the Army’s transformation into a faster, more dynamic force.

“This is a unique opportunity, and the MDTF — Soldiers and family members alike — feel privileged to be a part of it and don’t take for granted the responsibility and the privilege the Army’s given us to chart this path forward,” Isenhower said.

By Thomas Brading, Army News Service

Army Spectrum-Sensing Technology to Help Units Avoid Detection

Tuesday, February 9th, 2021

ABERDEEN PROVING GROUND, Md. (Feb. 3, 2021) – The Army is improving situational awareness of the electromagnetic battlefield by developing spectrum-sensing capabilities that provide Soldiers with greater awareness of their own radio emissions.

Soldiers currently cannot “see” their own radio emissions within the radio frequency spectrum, putting them at risk of detection by adversaries. The Army’s spectrum awareness effort provides intuitive graphic overlays that enable Soldiers to visualize the energy emitting from their radio frequency systems, said Jonathan Lee, an engineer with the Command, Control, Communications, Computers, Cyber, Intelligence, Surveillance and Reconnaissance (C5ISR) Center – a component of Army Futures Command’s Combat Capabilities Development Command.

“Knowing what we look like to the enemy from an electromagnetic perspective is a critical capability at all echelons of the Army,” said Lee. “This technology improves one’s situational understanding of the electromagnetic environment. It will enhance units’ ability to determine if a signal is friendly or malicious, and it will aid in planning maneuvers.”

Spectrum awareness is one of eight promising Army-developed science and technology efforts the Network Cross-Functional Team (CFT) has prioritized to receive research, development, test, and evaluation prototyping funds to move from early research and development to the demonstration and validation phase.

“Today, we need to be more judicious in order to increase survivability, specifically for our command posts where technology that transmits is most dense,” said Chief Warrant Officer 5 Chris Westbrook, N-CFT chief of marketing research and senior technical advisor. “This effort is going a long way to informing network design and our capability sets.”

Fiscal year 2020 is the first year the Network CFT requested and received prototyping funds aligned to science and technology integration efforts in support of future network capability sets.

“The funding is allowing the science and technology community to take the next step in developing spectrum awareness capabilities that will address capability gaps for the Army,” said Lee. “We believed this technology could be further matured to support additional complex propagation environments and support the identification of new and complex signal types. More work has to be done to further improve our situational awareness and understanding capabilities, but this funded effort is a key step in enhancing those for our Soldiers.”

Lee and his team were able to continue growing the capability from a Department of Defense technology readiness level (TRL) 4– which represents component or breadboard validation in a laboratory environment – to a TRL 6, which is a prototype ready for demonstration in an operationally relevant environment. This included further maturing capabilities for actionable intelligence and improved mission planning, such as Electronic Attack Effects Simulator (EAES) and Real Time Spectrum Situational Awareness (RTSSA).

EAES provides near-real time modeling and simulation to compute and visualize the impact of an adversarial electronic attack on a proposed course of action, thus aiding commanders in determining how best to maneuver assets within the battlespace.

RTSSA senses and compares detected spectrum against authoritative assignment data in the Joint Spectrum Data Repository to discriminate between “friendly” and adversarial communications emitters and other unauthorized radio frequency emitters, thus improving the quality of spectrum assignments and command decision support.

The C5ISR Center is partnering with the Network CFT and program executive offices (PEOs) to ensure these maturation efforts are properly vetted early for a viable and smooth transition to a program of record.

EAES, RTSSA and other C5ISR Center spectrum awareness capabilities are slated to be integrated with current and future increments of the Electromagnetic Warfare Planning Management Tool (EWPMT) – a capability under Project Manager Warfare and Cyber of PEO Intelligence Electronic Warfare and Sensors (IEW&S) that supports the commander’s military decision-making process.

“The EWPMT helps mitigate a critical vulnerability gap across most Army formations today: the ability to understand a unit’s friendly ‘foot print’ in the electromagnetic spectrum,” said Lt. Col. Jason Marshall, PEO IEW&S’s product manager for Electronic Warfare Integration (EWI). “This enables electronic warfare officers and electromagnetic spectrum manager Soldiers to inform their commander on how to conduct emission control, which ultimately enhances force protection and command post survivability in near-peer conflict.”

According to Marshall, the capability of widespread spectrum sensing contributes to a more accurate, timely, and tactically relevant understanding of the radio frequency spectrum, providing Soldiers with enhanced mission planning and the ability to inform multi-domain operations.

The C5ISR Center is working with PdM EWI to identify additional capabilities and demonstration needs. Spectrum awareness technologies are slated to be included in the first capability drops scheduled for fiscal years 2022 and 2023.

“The collaboration between the user community, research and development and acquisition is key to identifying what technologies are within the realm of possibility while refining the Soldier’s requirements as the current tactics, techniques, procedures and doctrine evolve,” Marshall said.

By Jasmyne Douglas, DEVCOM C5ISR Center Public Affairs

Embracing Holistic Health and Fitness for ACFT Success

Sunday, February 7th, 2021

JOINT BASE LANGLEY – EUSTIS, Va. – With the New Year comes a fresh start and a chance to start new positive habits, and that’s exactly what the U.S. Army is doing with the new Holistic Health and Fitness initiative.

The Holistic Health and Fitness system, led by the U.S. Army Training and Doctrine Command’s Center for Initial Military Training, represents a new approach to building lethality and readiness by focusing on Soldier physical, mental, and spiritual health.

From this new initiative came the new Army Combat Fitness Test, which will eventually replace the Army Physical Fitness Test as the official physical fitness test of record. Though the ACFT is still in the data collection stage, Soldiers across the enterprise have been encouraged to continue to train so they are ready to pass once the test is fully implemented.

A New Way to Train

In an effort to apply the new H2F initiative towards a variety of fitness demographics, as well as Soldiers’ ACFT performance, the team of expert at USACIMT have begun a ten week training program for Soldiers of Fort Eustis that puts the new initiative to work.

The program volunteers come from a wide range of fitness demographics, including Soldiers who are in the Army Body Composition Program, post-partum, post-surgery, or simply just struggling to pass specific events in the ACFT.

When asked about their goals for the program, Staff Sgt. Jacob Walker stated, “My goal is to recover from surgery with the new knowledge the Army is implementing with the H2F program, as well as to take this information back to my unit and train others with it.”

Sgt. Kenya King stated, “One of my strongest goals in this program is to take the knowledge I gain to encourage soldiers on a better health approach while training for the ACFT.”

The training group, coordinated by the 2020 Drill Sergeant of the Year, Sgt. 1st Class Erik Rostamo, meets three times a week and applies the five domains of Holistic Health and Fitness expressed in the FM 7-22 regulation – physical, nutritional, mental, spiritual, and sleep – to create individualized training plans for each of the participants.

Putting the Doctrine to Use

Along with the individualized fitness plans, Rostamo and his team will assist the participants in building a plan for their nutritional, mental, and spiritual health.

The participants will also work with command dietician, Maj. Brenda Bustillos, as a resource for guidance on creating nutritional meal plans that will work with each individual’s health needs. She will host regular discussions with the Army Body Composition Program participants after each physical training session to discuss and encourage healthy eating habits.

For mental resiliency, the program develops personal readiness through weekly Master Resiliency Training courses, creating Specific, Measurable, Attainable, Relevant, Time-based goals, also referred to as SMART goals, and providing various cognitive challenges during physical training. An example of a cognitive challenge that Rostamo provided was placing playing cards throughout the PT circuit without letting the participants know prior to, and then asking them which cards were placed after they finish the PT circuit. This type of training will strengthen the participants’ ability to stay aware of their surroundings while focused on a specific task at hand.

Lastly, for the spiritual component, the USACIMT chaplain, Lt. Col. Paul Fritts, provides the participants with lectures throughout the program to inspire them and help them find their “why” factor.

“The spiritual component is one of the most important, yet most misunderstood components of the H2F program,” Rostamo stated.

Rostamo explained that the spiritual component is composed of the Soldier’s values, or internal warrior factor, that drive them to want to improve themselves and be the best version of themselves that they can be.

Transforming the Force

This ten-week program, along with many other similar demonstrations happening throughout the force, shows just how beneficial the Army’s new H2F initiative can be when implemented correctly by team and squad leaders.

According to Rostamo, this new initiative is creating a cultural change in the Army that will escape the “one size fits all” approach to readiness.

“It will require a lot more creativity on the team and squad leaders than it has in the past to give Soldiers a plan that works for them,” Rostamo states. “Personal readiness is crucial, especially when it comes to building cohesive teams.”

By Nina Borgeson, TRADOC Communications Directorate

TRADOC’s New “Project Athena” Initiative Promotes Personal, Professional Self-Development

Saturday, February 6th, 2021

Officers attending Basic Officer Leaders Course-B and Captains Career Courses are getting the opportunity to jump-start their self-development with a U.S. Army Training and Doctrine Command initiative called “Project Athena.”

Project Athena, named for the Greek goddess of war and signifying wisdom and learning, is a leader development program designed to inform and motivate Soldiers to embrace personal and professional self-development. These assessments are intended to serve Soldiers throughout their career and over the next year will extend to noncommissioned officer, warrant officer and Civilian Education System courses at all levels of professional military education.

Specific assessments vary based on the level of PME. Trained proctors at the Centers of Excellence are currently delivering a series of introductory assessments to BOLC-B students. Assessments tapping into more advanced capabilities are given progressively to CCC and later to other more senior military students in the Command and General Staff Officers’ Course.

Mission Command Center of Excellence Director Brig. Gen. Charles Masaracchia is spearheading the program for TRADOC and the Combined Arms Center. “Leaders need to ask themselves three questions: ‘Am I as good as I want to be, or need to be, to lead Soldiers? Am I willing to honestly answer an assessment about who I am right now? Am I willing to put in the effort to improve?’ If the answer is ‘I’m not as good as I need to be,’ then Athena can help.”

As an example, BOLC-B students execute the following assessments during the program of instruction: Nelson Denny Reading Test, Criterion Online Writing Evaluation Service, Social Awareness and Influence Self-Assessment, Self-Assessment Individual Difference – Inventory (SAID-I), Army Critical Thinking Test, and a Leader 180 (self and peer assessment). In contrast, CCC students conduct a full Leader 360 (includes self, peer and superior assessments), Social Skills Inventory, Individual Adaptability, SAID-I, and the Military and Defense Critical Thinking Test and Inventory.

Staff and faculty are then made available to interpret the results and provide feedback to the individual, upon request. This feedback, a crucial component of the program, will help students gain self-awareness, learn where they need improvement and guide them in the creation of a self-development plan.

Hundreds of learning resources, tied to each assessment and the areas assessed, are available at no cost to the individual. Armed with this information, Soldiers can begin the self-development process immediately and proceed at their own pace.

“Athena takes a comprehensive view of what Soldiers and leaders need to be able to do and the ways they can improve,” said Col. Samuel Saine, director of the Center for the Army Profession and Leadership. “Better self-awareness allows individuals to make better choices about what they do – with tangible feedback, they can quickly take action to address how they lead, communicate, think, and interact with others.”

Athena assessments began in July 2020 and CAPL and the CoEs are continuously reviewing the program’s execution and making adjustments as necessary. All students in the remainder of the CCCs and in CGSOC will begin using Athena assessments in early 2021.

“Leaders that answer their assessments openly and honestly, will benefit the most,” said Saine. “They can continue to evaluate feedback and adjust their personalized programs throughout their careers. The intent is to fuel a lifelong commitment to self-development and improvement. If we’ve accomplished that, we’ve met our goal.”

By Randi Stenson, MCCoE Public Affairs

Discovery Could Lead to Self-Propelled Robots

Thursday, February 4th, 2021

RESEARCH TRIANGLE PARK, N.C. — Army-funded researchers discovered how to make materials capable of self-propulsion, allowing materials to move without motors or hands.

Researchers at the University of Massachusetts Amherst discovered how to make materials that snap and reset themselves, only relying upon energy flow from their environment. This research, published in Nature Materials and funded by the U.S. Army, could enable future military robots to move from their own energy.

“This work is part of a larger multi-disciplinary effort that seeks to understand biological and engineered impulsive systems that will lay the foundations for scalable methods for generating forces for mechanical action and energy storing structures and materials,” said Dr. Ralph Anthenien, branch chief, Army Research Office, an element of the U.S. Army Combat Capabilities Development Command, now known as DEVCOM, Army Research Laboratory. “The work will have myriad possible future applications in actuation and motive systems for the Army and DOD.”

Researchers uncovered the physics during a mundane experiment that involved watching a gel strip dry. The researchers observed that when the long, elastic gel strip lost internal liquid due to evaporation, the strip moved. Most movements were slow, but every so often, they sped up.

These faster movements were snap instabilities that continued to occur as the liquid evaporated further. Additional studies revealed that the shape of the material mattered, and that the strips could reset themselves to continue their movements.

“Many plants and animals, especially small ones, use special parts that act like springs and latches to help them move really fast, much faster than animals with muscles alone,” said Dr. Al Crosby, a professor of polymer science and engineering in the College of Natural Sciences, UMass Amherst. “Plants like the Venus flytraps are good examples of this kind of movement, as are grasshoppers and trap-jaw ants in the animal world.”

Snap instabilities are one way that nature combines a spring and a latch and are increasingly used to create fast movements in small robots and other devices as well as toys like rubber poppers.

“However, most of these snapping devices need a motor or a human hand to keep moving,” Crosby said. “With this discovery, there could be various applications that won’t require batteries or motors to fuel movement.”

After learning the essential physics from the drying strips, the team experimented with different shapes to find the ones most likely to react in expected ways, and that would move repeatedly without any motors or hands resetting them. The team even showed that the reshaped strips could do work, such as climb a set of stairs on their own.

“These lessons demonstrate how materials can generate powerful movement by harnessing interactions with their environment, such as through evaporation, and they are important for designing new robots, especially at small sizes where it’s difficult to have motors, batteries, or other energy sources,” Crosby said.

The research team is coordinating with DEVCOM Army Research Laboratory to transfer and transition this knowledge into future Army systems.

By U.S. Army DEVCOM Army Research Laboratory Public Affairs

Thank You Mr David Geringer for Your Years of Service to the Soldier!

Monday, February 1st, 2021

Congratulations to Mr. David Geringer on his retirement after decades of service to the Army.

Mr. Geringer served 22 years as a Soldier, then began his civilian career as Assistant Product Manager, Soldier Clothing and Individual Equipment (SCIE), then served as Deputy Product Manager, SCIE and Supervisory Logistics Management Specialist for Headquarters, PEO Soldier.

Thanks for all of your hard work! Good luck on your second retirement.

Kombucha Tea Sparks Creative Materials Research Solution

Monday, February 1st, 2021

RESEARCH TRIANGLE PARK, N.C. — Kombucha tea, a trendy fermented beverage, inspired researchers to develop a new way to generate tough, functional materials using a mixture of bacteria and yeast similar to the kombucha mother used to ferment tea.

With Army funding, using this mixture, also called a SCOBY, or symbiotic culture of bacteria and yeast, engineers at MIT and Imperial College London produced cellulose embedded with enzymes that can perform a variety of functions, such as sensing environmental pollutants and self-healing materials.

The team also showed that they could incorporate yeast directly into the cellulose, creating living materials that could be used to purify water for Soldiers in the field or make smart packaging materials that can detect damage.

“This work provides insights into how synthetic biology approaches can harness the design of biotic-abiotic interfaces with biological organization over multiple length scales,” said Dr. Dawanne Poree, program manager, Army Research Office, an element of the U.S. Army Combat Capabilities Development Command, now known as DEVCOM, Army Research Laboratory. “This is important to the Army as this can lead to new materials with potential applications in microbial fuel cells, sense and respond systems, and self-reporting and self-repairing materials.”

The research, published in Nature Materials was funded by ARO and the Army’s Institute for Soldier Nanotechnologies at the Massachusetts Institute of Technology. The U.S. Army established the ISN in 2002 as an interdisciplinary research center devoted to dramatically improving the protection, survivability, and mission capabilities of the Soldier and Soldier-supporting platforms and systems.

“We foresee a future where diverse materials could be grown at home or in local production facilities, using biology rather than resource-intensive centralized manufacturing,” said Timothy Lu, an MIT associate professor of electrical engineering and computer science and of biological engineering.

Researchers produced cellulose embedded with enzymes, creating living materials that could be used to purify water for Soldiers in the field or make smart packaging materials that can detect damage.

These fermentation factories, which usually contain one species of bacteria and one or more yeast species, produce ethanol, cellulose, and acetic acid that gives kombucha tea its distinctive flavor.

Most of the wild yeast strains used for fermentation are difficult to genetically modify, so the researchers replaced them with a strain of laboratory yeast called Saccharomyces cerevisiae. They combined the yeast with a type of bacteria called Komagataeibacter rhaeticus that their collaborators at Imperial College London had previously isolated from a kombucha mother. This species can produce large quantities of cellulose.

Because the researchers used a laboratory strain of yeast, they could engineer the cells to do any of the things that lab yeast can do, such as producing enzymes that glow in the dark, or sensing pollutants or pathogens in the environment. The yeast can also be programmed so that they can break down pollutants/pathogens after detecting them, which is highly relevant to Army for chem/bio defense applications.

“Our community believes that living materials could provide the most effective sensing of chem/bio warfare agents, especially those of unknown genetics and chemistry,” said Dr. Jim Burgess ISN program manager for ARO.

The bacteria in the culture produced large-scale quantities of tough cellulose that served as a scaffold. The researchers designed their system so that they can control whether the yeast themselves, or just the enzymes that they produce, are incorporated into the cellulose structure. It takes only a few days to grow the material, and if left long enough, it can thicken to occupy a space as large as a bathtub.

“We think this is a good system that is very cheap and very easy to make in very large quantities,” said MIT graduate student and the paper’s lead author, Tzu-Chieh Tang.

To demonstrate the potential of their microbe culture, which they call Syn-SCOBY, the researchers created a material incorporating yeast that senses estradiol, which is sometimes found as an environmental pollutant. In another version, they used a strain of yeast that produces a glowing protein called luciferase when exposed to blue light. These yeasts could be swapped out for other strains that detect other pollutants, metals, or pathogens.

The researchers are now looking into using the Syn-SCOBY system for biomedical or food applications. For example, engineering the yeast cells to produce antimicrobials or proteins that could benefit human health.

The MIT-MISTI MIT-Imperial College London Seed Fund and the MIT J-WAFS Fellowship also supported this research.