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quanta    
n.
pl. 量子

量子

quanta
量子

Quantum \Quan"tum\, n.; pl. {Quanta}. [L., neuter of quantus how
great, how much. See {Quantity},]
1. Quantity; amount. "Without authenticating . . . the
quantum of the charges." --Burke.
[1913 Webster]

2. (Math.) A definite portion of a manifoldness, limited by a
mark or by a boundary. --W. K. Clifford.
[1913 Webster]

{Quantum meruit}[L., as much as he merited] (Law), a count in
an action grounded on a promise that the defendant would
pay to the plaintiff for his service as much as he should
deserve.

{Quantum sufficit}, or {Quantum suff.} [L., as much suffices]
(Med.), a sufficient quantity; -- abbreviated {q. s.} in
pharmacy.

{Quantum valebat}[L., as much at it was worth] (Law), a count
in an action to recover of the defendant, for goods sold,
as much as they were worth. --Blackstone.
[1913 Webster]


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  • Scientists Found a Protein That Drives Brain Aging - ScienceDaily
    Scientists have uncovered a powerful new clue in the mystery of brain aging: a single protein called FTL1 In aging mice, higher levels of this protein weakened connections between brain cells and
  • Ferritin light chain - Wikipedia
    FTL is regulated by iron and with an increase in iron, there is both an increase in the FTL expression and PEN-2 levels, which results in increased γ- secretase activity
  • Brain Aging: This Protein Is Linked to Memory Loss and Cognitive . . .
    Summary Increasing FTL1 levels in young mice produced brain changes similar to those seen in older mice The researchers found that this change occurs because of alterations in the way nerve cells produce FTL1 protein Aging is a significant factor in memory loss and cognitive decline
  • Study Reveals the Single Cause of Cognitive Decline—and a Cure
    The groundbreaking study also revealed how the offending protein does its harm Researchers learned that high levels of FTL1 act like a metabolic brake, slowing energy production within brain cells
  • New Protein Discovery Offers Hope in Combatting Brain Aging
    Research Uncovers FTL1 Protein's Role in Brain Aging In a groundbreaking study conducted at the University of California, San Francisco, scientists have identified a protein, FTL1, that significantly impacts the aging process of the brain This study, published in Nature Aging on April 5, 2026, reveals that elevated levels of FTL1 in older mice are correlated with a decline in memory and
  • Scientists say reducing one brain protein may reverse age-related . . .
    The researchers tested this theory by increasing FTL1 levels in healthy young mice, which caused them to immediately experience memory impairments When they did the opposite with older mice,
  • Discovery of FTL1: A Protein Driving Brain Aging, and a Path to Reversal
    Scientists have identified the FTL1 protein as a major driver of brain aging and memory loss Learn how reducing FTL1 levels led to remarkable brain recovery in mice, offering new hope for anti-aging therapies
  • FTL1 Protein: A Breakthrough in Reversing Brain Aging and Memory Loss
    Researchers at the University of California, San Francisco (UCSF) have identified a protein called FTL1 that appears to drive the aging process in the brain The study focused on the hippocampus, a region of the brain critical for learning and memory, which is particularly susceptible to the effects of aging The research team observed that older mice possessed higher levels of FTL1
  • Researchers identify FTL1 protein as a key driver of brain aging and . . .
    The team also found that FTL1 dampens the metabolic activity of brain cells, slowing how they use energy in the hippocampus In contrast, when FTL1 levels were reduced in older mice, the animals showed signs of recovery: connections between neurons increased and their memory performance improved, indicating a partial reversal of age‑related
  • Brain Aging Protein FTL1 Discovery | UCSF Study
    Scientists at UCSF uncovered FTL1, a protein accelerating brain aging via iron dysregulation Mouse studies show reversal of cognitive decline by targeting it …





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