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A German town built a granary atop its Jewish cemetery. Now the bones are yielding insights about Ashkenazi DNA.

BERLIN (JTA) – The city of Erfurt in central Germany is home to an impeccably restored medieval synagogue made possible because local Jews had been expelled long before the Nazis began their campaign to destroy Jewish sites.

Now, Erfurt’s long-hidden Jewish past is again offering new insights — this time about the genetic history of Ashkenazi Jews.

Human remains from a medieval Jewish cemetery in Erfurt have allowed what researchers say is the largest ancient Jewish DNA study to date. Conducted without disinterring any remains, in keeping with Jewish law, the study published Wednesday in the scientific journal Cell found that Erfurt’s medieval Jewish community was more genetically diverse than their modern-day cousins, and carried many of the same Jewish genetic diseases — such as Tay Sachs and cystic fibrosis — that affect Ashkenazi Jews today.

“There have been many previous DNA studies, but not of Jews,” said geneticist Shai Carmi, a professor at the Hebrew University of Jerusalem, whose search for study material led him to an archaeological dig at the Jewish cemetery in Erfurt. He and his collaborators were able to analyze DNA of 33 individuals who died between 1270 and 1400, using teeth they found there.

The study follows a similar analysis revealed in August by researchers in England, who studied the DNA from skeletons found at the bottom of a medieval well and concluded that the remains were likely of victims of an antisemitic massacre in 1190. Analysis of six individuals prior to their identification as Jewish revealed that Ashkenazi Jews developed a unique genetic variation centuries earlier than realized.

The Erfurt analysis also includes samples from before the epidemic of Black Death that was until recently understood to have created the genetic “bottleneck” that created the genetic markers common among Ashkenazi Jews today.

Erfurt’s Jewish settlement existed from the 11th to 15th century, with a brief gap following a 1349 massacre perpetrated after the Jews were falsely blamed for causing the bubonic plague. Surviving Jews returned there, but after all Jews were expelled once and for all in 1454, the city built a granary on top of the Jewish cemetery.

Karin Sczech participates in the excavation at the medieval Jewish cemetery of Erfurt. (Courtesy of TLDA Ronny Krause)

In 2013, the city approved the repurposing of the unused granary into a parking lot. Because it was an historic site, a rescue excavation was initiated, overseen for the State of Thuringia by German archaeologist Karin Sczech.

Meanwhile, Carmi had been looking for Jewish cemeteries anywhere in the world “where we could analyze remains already excavated,” he told JTA in a telephone interview from Jerusalem. “I consulted historians and eventually reached the archeologist in Erfurt.” Fortunately, he said, “they still hadn’t reburied the remains.”

He approached Sczech, who later became a co-author of the new study. In 2018, with a supportive judgment from Rabbi Ze’ev Litke — an Israeli expert on genetics and Jewish law — and permission from Erfurt’s then-rabbi, Benjamin Kochan, work began to extract and analyze DNA from detached teeth found in the graves. (About 500 Jews live in Erfurt today, most of them having migrated from the former Soviet Union since 1990.)

American geneticist David Reich picked up the teeth and brought them back to the department of human evolutionary biology at Harvard University in Cambridge, Massachusetts, where drilling and DNA extraction took place.

While the skeletons were reburied, the teeth are still stored at the research institutes where they have been analyzed, in case scientists need to retest to verify the result.

The project provides an ethical basis for studies of ancient Jewish DNA, Carmi said. “Of course we couldn’t just go to a cemetery and dig and take out skeletons; this would be prohibited,” he said, referring to Jewish law prohibiting the removal of bones from where someone was buried.

But Litke opined that the study could be done, because the bones already had been disturbed for an unrelated reason. “He recommended using teeth, as the analysis does almost no damage,” Carmi said.

There are many motivations to study Jewish DNA: One can find lost relatives going back a few generations, and answer questions about Jewish origin of partners intending to marry. But the goal of Carmi’s team was “to fill the gaps in our understanding of Ashkenazi Jewish early history.”

There are several non-destructive ways to obtain DNA from human remains, said Carmi, who also works as a consultant to an Israeli firm that helps clients trace their genetic roots.

“You can take an almost microscopic slice of bone and extract DNA in a solution, or put the entire bone in a solution and extract the DNA without drilling, without disturbing the dead. This opens the way to doing studies even without teeth,” he added.

His team found that the Erfurt community appeared to fit into two genetically distinct groups, descending either from Middle Eastern or European populations. This genetic variability no longer exists, Carmi said.

At the same time, Carmi said, the analysis found remarkable continuity in the local community, as well. “One third of the Erfurt individuals descended from one woman through their maternal lines,” he said, adding that evidence suggested that she lived between 1,000 and 2,000 years ago.

In a press statement, geneticist Reich of Harvard said the work “also provides a template for how a co-analysis of modern and ancient DNA data can shed light on the past. Studies like this hold great promise not only for understanding Jewish history, but also that of any population.”

The research team, with more than 30 scientists, included Hebrew University’s Shamam Waldman, a doctoral student in Carmi’s group, who performed most of the data analysis.


The post A German town built a granary atop its Jewish cemetery. Now the bones are yielding insights about Ashkenazi DNA. appeared first on Jewish Telegraphic Agency.

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Samsung Washing Machine Repair: Frequent Issues and Professional Fixes

When your Samsung washing machine begins acting up, it can throw your entire laundry routine into chaos. Even with cutting-edge technology and sleek designs, these appliances can develop issues that range from minor glitches to major malfunctions. This comprehensive guide will take you through the most common problems encountered with Samsung washers, walk you through initial diagnostic steps, and explain when and why professional repairs become essential. For more detailed repair insights, Discover more here.

Understanding the Challenges

Samsung washing machines are celebrated for their innovative features, energy efficiency, and robust performance. Yet, like all complex machinery, they are susceptible to wear and tear. Users often report issues such as:

  • Error Codes: Cryptic digital messages indicating malfunctioning sensors or control board errors.
  • Water Drainage Problems: Incomplete draining leading to wet clothes or water pooling in the drum.
  • Excessive Vibration or Noise: Unusual sounds during spin cycles, often a sign of imbalance or mechanical wear.
  • Leaking Water: Water escaping from the machine, which can damage floors and other nearby surfaces.
  • Door Lock or Latch Failures: Problems with door sensors or locking mechanisms that prevent the machine from starting.
  • Motor or Pump Issues: Malfunctions that affect the washer’s ability to agitate, drain, or complete cycles properly.

Each of these issues may have different root causes, and understanding them is the first step to determining whether you can fix it yourself or need professional assistance.

Step-by-Step Diagnostic Process

Before jumping into repairs, it is wise to perform a systematic diagnostic check. Begin by noting any error codes displayed on your machine’s control panel. Samsung models typically provide codes such as “4E” (water inlet issues) or “5E” (drainage errors), which can guide your troubleshooting efforts.

Initial Checks:

  • Power and Settings: Ensure the washer is properly plugged in and that the selected cycle includes the drain phase.
  • Water Supply: Verify that the water inlet is unobstructed and that water pressure is sufficient. Low water pressure can sometimes trigger fill errors.
  • Drainage System: Inspect the drain hose for kinks or blockages. Remove any debris that may hinder the water flow.

Advanced Checks: For more persistent issues, consider:

  • Cleaning filters and pump components to remove lint or foreign objects.
  • Checking sensor contacts and wiring for signs of corrosion or loose connections.
  • Observing the machine during a test cycle to listen for unusual noises that might indicate a failing motor or pump.

These steps can help determine if the problem is a simple fix you can handle on your own, such as clearing a clogged hose, or if it indicates a more severe fault.

When Professional Repairs Are Necessary

While basic troubleshooting can resolve many issues, there are cases when professional repair is the safer and more effective route:

  • Complex Electronic Failures: If your washer is displaying persistent error codes or the control board seems unresponsive, professional diagnostics are crucial to avoid further damage.
  • Mechanical Breakdowns: Problems with the motor, pump, or internal transmission often require specialized tools and expertise to repair correctly.
  • Warranty Considerations: If your Samsung washer is still under warranty, attempting a DIY repair could void it. Authorized technicians use approved parts and methods to maintain your warranty’s validity.
  • Safety Risks: Any repairs involving electrical components or high-voltage parts should be handled by professionals to prevent injury.

When in doubt, it’s best to consult a certified repair service. Professionals have access to manufacturer-specific repair manuals and diagnostic tools that increase the likelihood of a lasting fix.

Professional Fixes: What to Expect

A reputable service technician will start by running a complete diagnostic test on your Samsung washing machine. Once the issue is identified, they may take actions such as:

  • Replacing faulty sensors or electronic control boards that trigger error codes.
  • Cleaning or replacing clogged filters, drain hoses, and pump components to restore proper drainage.
  • Rebalancing or repairing motor assemblies to reduce excessive vibration and noise.
  • Fixing or replacing door locks and latches to ensure safety and proper operation.

The goal of a professional repair is not only to fix the immediate issue but also to provide preventive advice to reduce the likelihood of future malfunctions. Technicians often inspect related components that might soon wear out, recommending part replacements as needed to avoid recurring problems.

Preventive Maintenance: Tips for Longevity

Keeping your Samsung washing machine in peak condition requires a blend of regular maintenance and occasional professional check-ups. Here are some effective strategies:

  • Regular Cleaning: Clean the filter, drain hose, and pump area at least once a month to remove lint and debris.
  • Descaling: In areas with hard water, mineral deposits can affect performance. Use a descaling agent as recommended by the manufacturer.
  • Proper Loading: Avoid overloading the washer, which can strain the motor and pump, and always use the appropriate amount of detergent.
  • Periodic Professional Inspections: Schedule an annual service call to ensure that all components are functioning correctly and to replace any parts showing signs of wear.
  • Follow the Manual: Always refer to the user manual for specific maintenance recommendations tailored to your model.

By adopting these habits, you not only prevent common issues but also extend the overall lifespan of your appliance.

Case Studies: Real-World Success Stories

Consider the experience of Emily, who noticed her Samsung washer repeatedly displaying a “5E” error—indicative of a drainage problem. After a thorough DIY inspection revealed a partially blocked drain hose, she still encountered intermittent issues. Emily then called a professional repair service, which discovered a worn-out pump impeller. Replacing this part not only resolved the error but also improved the machine’s overall efficiency.

In another instance, James’s Samsung washer started to vibrate excessively during spin cycles. What began as a minor annoyance quickly escalated into a concern about potential damage. Professional technicians found that the machine’s suspension system was compromised, and they rebalanced the unit while replacing worn-out shock absorbers. The result was a quieter, more stable machine that James could rely on for years to come.

Samsung washing machines are built to offer convenience and efficiency, but even the best appliances need proper care and occasional expert attention. Whether you’re a DIY enthusiast or prefer to call in the professionals, understanding the common issues and their solutions is key to keeping your machine in top shape. With proactive maintenance and timely repairs, you can ensure that your washer not only lasts longer but also continues to perform at its best.

Embrace preventive practices, know when to take matters into your own hands, and don’t hesitate to seek professional help when needed. In doing so, you safeguard your investment and enjoy the seamless, stress-free operation of your Samsung washing machine for years to come.

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The Science Behind Streak-Free Windows: What Professionals Do Differently

When it comes to window cleaning, nothing beats the satisfaction of streak-free, crystal-clear glass. But achieving this pristine finish isn’t as simple as grabbing a cloth and some spray. Professional window cleaners have mastered the science behind streak-free windows, using specific techniques and tools to deliver flawless results. Here’s what they do differently and why their methods are so effective.

1. Using the Right Tools for the Job

Professionals don’t rely on standard cleaning products or paper towels to get the job done. Instead, they use high-quality tools specifically designed for window cleaning. Key items in their arsenal include:

  • Squeegees: The cornerstone of any professional’s toolkit, squeegees ensure even water removal, leaving no streaks behind. The rubber blades are replaced regularly to maintain their effectiveness.
  • Microfiber Cloths: Unlike traditional rags, microfiber cloths are lint-free and highly absorbent, making them perfect for detailing and edge cleaning.
  • Specialized Cleaning Solutions: Professionals often use eco-friendly, ammonia-free solutions that dissolve dirt and grease without leaving residues.
  • Water-Fed Poles: For high-rise or hard-to-reach windows, water-fed poles equipped with purified water systems are used to clean without streaking.

2. The Importance of Purified Water

One of the secrets to streak-free windows lies in the water itself. Tap water contains minerals, salts, and impurities that can leave behind spots and streaks when it dries. Professionals use purified water systems that remove these contaminants, ensuring a spotless finish.

Purified water also has a natural ability to dissolve dirt and grime more effectively than regular water. When combined with the right tools, it creates the perfect formula for crystal-clear windows.

3. Perfecting the Technique

The way professionals clean windows is just as important as the tools they use. Here are some techniques they employ to achieve streak-free results:

  • Pre-Cleaning: Before tackling the glass, professionals remove loose dirt and debris from the surface to prevent scratches.
  • Systematic Movements: Using a squeegee, they clean in overlapping strokes, starting at the top and working their way down. This ensures no spots are missed and prevents water from dripping onto already cleaned areas.
  • Edge Detailing: Professionals pay special attention to the edges and corners of the glass, where streaks are most likely to form. Microfiber cloths are often used for this step.
  • Drying Techniques: Any remaining water is carefully wiped away to prevent streaking. This step is crucial, especially in areas with high humidity.

4. Timing Matters

Professional window cleaners know that timing can make or break the outcome. Cleaning windows on a sunny day might seem like a good idea, but direct sunlight causes cleaning solutions to dry too quickly, leaving streaks behind. Professionals prefer overcast days or cooler parts of the day to ensure optimal results.

5. Safety First

For high-rise buildings or windows in hard-to-reach places, safety is a top priority. Professionals use specialized equipment like harnesses, ladders, and scaffolding to ensure they can clean effectively without compromising safety. This expertise allows them to tackle challenging jobs while maintaining streak-free quality.

6. Experience and Training

What truly sets professionals apart is their experience. Years of practice have honed their skills, allowing them to identify and address potential issues, like hard water stains or stubborn grime, before they become a problem. Their training ensures they can adapt to different types of glass and environments, delivering consistent results every time.

A Trusted Name in Toronto

When it comes to achieving streak-free windows, Toronto Window Cleaners has perfected the art. With over 20 years of experience, their team of fully trained and certified professionals uses advanced techniques and tools to deliver exceptional results. Whether it’s a residential property or a high-rise building, they’ve built a reputation for excellence across the Greater Toronto Area.

In conclusion, the science behind streak-free windows is a blend of using the right tools, employing expert techniques, and understanding the conditions that impact cleaning results. By trusting professionals, you’re not just ensuring sparkling windows—you’re investing in a methodical process that guarantees perfection every time.

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Memoir of child of Holocaust survivors takes riveting twists

Book Review by Julie Kirsh (former Sun Media News Research Director)
Exclusive to The Jewish Post
“We used to Dream of Freedom, A Memoir of Family, the Holocaust, and the Stories We Don’t Tell”
By Sam Chaiton (Dundurn Press) 2024
Sam Chaiton’s memoir of growing up with Holocaust survivor parents in downtown Toronto in the 1950s is a compelling read.
Jeanne Beker, a well known Toronto fashion writer, mentions in her praise for “We used to Dream of Freedom” that her survivor parents talked incessantly about their war experiences.
My own parents, both survivors, would drop tidbits of their stories now and again. I learned to be watchful and vigilant for these rare moments of revelation. However, questioning my parents about the Holocaust, would cause them pain. I knew when to stand down.
In his memoir, Sam Chaiton tells the reader that his parents chose to remain completely silent about their wartime experiences. Poignantly their son was left with a silence that he interpreted as huge empty sound. Although the son could understand some Yiddish, his parents turned to Polish in order to keep the “kinder safe”. Outright denial of illness and death was part of his parents’ way of coping.
Born in the 1950s on Palmerston Boulevard in downtown Toronto, Chaiton paints a vivid picture of his youth as the middle son of five boys. He describes the mayhem of a household of barked orders and punishment by his father’s belt. His mother, as with many other survivors, was obsessed with eating and food. Chaiton learned early that rejecting his controlling mother’s food was one of his few weapons. “It’s hard not to do what a Holocaust survivor wants you to”, he says. Chaiton had to stare down two parents both with tattoos.
Dance proved to be a saving grace for Chaiton. On the dance floor, with a partner, the gates of happiness and permission to be oneself, opened. The Toronto Dance Theatre in Yorkville was a salvation and home for Chaiton. Also important to Chaiton was a family – not his troubled blood family but a chosen one – a commune.
In 1973, after a sojourn in New York, Chaiton decided that he was not a performance dancer. Back in Toronto as he pointedly danced with his mother at his brother’s wedding, she told him that he was her favourite child, imposing “the psychological damage that parental favouritism caused”.
Living in a commune with a chosen family afforded Chaiton the freedom to dig deep into his psyche, face his traumatic upbringing and tear down the rigid rules of society and the biological family. At a certain point, for reasons he explains in the book, Chaiton made the decision to vanish from the lives of his parents and brothers.
In 1980 the commune took up the cause of the injustice and illegal jailing of Rubin “Hurricane” Carter. Carter had been exonerated, released from prison and then reconvicted and sent back to prison.
In hindsight Chaiton wonders if his disengagement from his family caused them the same wounds and feelings of emptiness that Carter had to face when he was reincarcerated.
In 1985 while sitting in a New Jersey prison yard with friends and Carter, Chaiton had the riveting vision that he was in a concentration camp, “on a mission to liberate (his) parents – the dream of every Holocaust survivor’s child.”
In the summer of 1985, Chaiton received the news from Toronto that his parents were involved in a fatal car accident. Only after his mother’s death, was Chaiton able to acknowledge that in spite of her smothering, she gave him a sense of self worth and strength.
In 1988 Chaiton co-wrote the story of freeing Carter. One of his brothers saw him on a news broadcast, contacted him and the 20-year silence between Chaiton and his blood family was over.
Riding on the coattails of the successful release of Carter, Chaiton and some friends established an organization that continues to exist today. Innocence Canada has helped wrongfully convicted people like Guy Paul Morin, David Milgaard and Steven Truscott.
In chapter 16, entitled Wierzbnik, Chaiton finally learns about his father’s testimony published in a book, “Remembering Survival”, by a university professor. Reading about his father’s history helped Chaiton to understand the damage done to survivors, his parents’ trauma and why the home that they created for their sons after the war was so fraught.
Chaiton remarks on the interconnectedness of learning about the sufferings of his parents, his own personal struggles and the gift his father left him of being able to tell his own story.
Sam Chaiton’s profound memoir took courage and brutal honesty to write.
His book teaches that the legacy left by Holocaust survivors, along with a deep sadness, is the innate need of the children to persevere and find their own path of survival and growth.

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