¼±Åà - È­»ìǥŰ/¿£ÅÍŰ ´Ý±â - ESC

 
"familial progressive hearing loss"¿¡ ´ëÇÑ °Ë»ö °á°úÀÔ´Ï´Ù. °Ë»ö °á°ú º¸´Â µµÁß¿¡ Tab ۸¦ ´©¸£½Ã¸é °Ë»ö âÀÌ ¼±Åõ˴ϴÙ.
´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
  • bone conduction hearing
    »ÀÀüµµµè±â, °ñÀüµµÃ»·Â
  • double disharmonic hearing
    ÀÌÁßµè±â, º¹Ã»
  • electric hearing aid
    Àü±âº¸Ã»±â
  • hearing
    1. û°¢, û·Â 2. µè±â, ûÃë
  • hearing acuity
    û·Â
  • hearing aid
    º¸Ã»±â
  • hearing defect
    û°¢Àå¾Ö
  • hearing disorder
    µè±âÀå¾Ö, û·ÂÀå¾Ö
  • hearing distance
    û·Â°Å¸®, °¡Ã»°Å¸®
  • hearing disturbance
    û·ÂÀå¾Ö
  • hearing problem
    µè±âÀå¾Ö, û°¢Àå¾Ö
  • hearing protector
    û°¢º¸È£±â
  • hearing range
    û¿ª, µè´Â¹üÀ§
  • hearing sense
    û°¢
  • hearing speech clinic
    û°¢¾ð¾îÁø·á¼Ò
¿¾ ´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
  • radiation loss
    ¹æ»ç¼±¼Õ½Ç
  • signal loss
    ½ÅÈ£¼Ò½Ç
  • vitreous loss
    À¯¸®Ã¼Å»Ãâ
  • absolute hearing
    Àý´ëÀ½°¨
  • air conduction hearing
    °ø±âÀü´Þµè±â, ±âµµÃ»·Â
  • electric hearing aid
    Àü±âº¸Ã»±â
  • hearing acuity
    û·Â
  • hearing aid
    º¸Ã»±â
  • transistor hearing aid
    Æ®·£Áö½ºÅͺ¸Ã»±â
  • binaural hearing
    ¾çÂʱ͵è±â
  • binaural hearing effect
    µÎ±Íµè±âÈ¿°ú
  • bone conduction hearing
    »ÀÀüµµµè±â, °ñµµÃ»·Â
  • hearing speech clinic
    û°¢¾ð¾îÁø·á¼Ò
  • double disharmonic hearing
    ÀÌÁßµè±â
  • hearing defect
    û°¢Àå¾Ö
¿¾ ´ëÇÑÀÇÇù 2 ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
  • hearing, shadow
    À½¿µÃ»°¢
  • hearing, speech
    ¾îÀ½Ã»·Â
  • hearing, threshold of
    °¡Ã»¿ªÄ¡
  • phonemic hearing
    À½¿îûÃë
  • relative hearing
    »ó´ë(Àû) û°¨
  • acquired progressive lymphangioma
    ÈÄõ¼º ÁøÇ༺ ¸²ÇÁ°üÁ¾
  • hereditary progressive mucinous histiocytosis X
    À¯Àü¼º ÁøÇ༺ Á¡¾×¼ºÁ¶Á÷±¸Áõ
  • infantile progressive spinal muscular atrophy
    ¿µ¾ÆÁøÇ༺ ô¼ö¼º ±ÙÀ§Ãà(Áõ).
  • progressive
    ÁøÇ༺
  • progressive
    ÁøÇ༺ÀÇ(òäú¼àõ¡­), Á÷Áø(¼º)ÀÇ(òÁòä(àõ)¡­)
  • progressive bulbar palsy
    ÁøÇ༺ ±¸<¿¬¼ö>¸¶ºñ(òäú¼àõϹ<æÅâÐ> Ýö).
  • progressive cardiomyopathic lentiginosis
    ÁøÇ༺ ½É±Ùº´¼º ÈæÀÚÁõ
  • progressive case
    ÁøÇ༺ ¿¹.
  • progressive deafness
    ÁøÇà(¼º) ³­Ã»
  • progressive deafness
    ÁøÇ༺ ³­Ã»(òäú¼àõ Ññôé)
¿¾ ´ëÇÑÀÇÇù 3 ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
  • segmental sensory loss =s. s. dissociation
    Áö°¢Çظ®(ò±ÊÆú°ìÆ)
  • signal loss
    ½ÅÈ£ ¼Ò½Ç
  • transepidermal water loss
    °æÇÇ ¼öºÐ¼Õ½Ç
  • visual loss
    ½Ã°¢»ó½Ç, ½Ç¸í
  • vitreous loss
    À¯¸®Ã¼Å»Ãâ
  • water loss
    ¼öºÐ¼Õ½Ç(â©ÝÂáßã÷)
  • water loss
    ¼öºÐ¼Õ½Ç(â©ÝÂáßã÷).
  • weight loss
    üÁß°¨¼Ò(ô÷ñìÊõá³), °¨·® (ÊõåÖ)
  • weight loss
    üÁß°¨¼Ò(ô÷ñìÊõá³), °¨·® (ÊõåÖ).
  • acquired progressive lymphangioma
    ÈÄõ¼º ÁøÇ༺ ¸²ÇÁ°üÁ¾
  • ataxic locomotrice progressive
    ÁøÇ༺ À̵¿ ¿îµ¿½ÇÁ¶.
  • chronic progressive disciform granulomatosis
    ¸¸¼º ÁøÇ༺ ¿øÆÇ»ó À°¾ÆÁ¾Áõ
  • chronic progressive external ophthalmoplegia
    ¸¸¼ºÁøÇ༺¿Ü¾È±Ù¸¶ºñ
  • dystrophia musculorum progressive ³ª
    ÁøÇ༺ ±ÙÀ°ÀÌ¿µ¾ç(Áõ)(òäú¼àõÐÉë¿ì¶ç½å×ñø).
  • essential progressive deafness
    Ư¹ß¼º ÁøÇà(¼º) ³­Ã»
KMLE ÀÇÇоà¾î »çÀü À¯»ç °Ë»ö °á°ú : 5 ÆäÀÌÁö: 6
EELS electron energy loss spectroscopy
ELS Eaton-Lambert syndrome; electron loss spectroscopy; extended least square; extracorporeal life suppo...
EWL egg-white lysozyme; evaporation water loss
EXELFS extended electron-loss line fine structure
FDBL fecal daily blood loss
KMLE ÀÚµ¿ÃßÃâ ÀÇÇоà¾î »çÀü À¯»ç °Ë»ö °á°ú : 5 ÆäÀÌÁö: 6
PMR Progressive Muscle Relaxation
PME Progressive Myoclonus Epilepsy
PR Progressive Ratio
PSP Progressive supranuclear paly
PSS Progressive Systemic Scleroderma
CancerWEB ¿µ¿µ ÀÇÇлçÀü À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 6
progressive supranuclear palsy A disorder that is associated with nerve cell destruction and progressive lack of coordination, neck stiffness, trunk stiffness, problems with eye movement and mild dementia. Disorders that are similar include Alzheimer's disease, cerebellar dysfunction, Jakob-Creutzfeldt disease and Parkinson's disease. The cause for progressive supranuclear palsy is unknown, but is likely a degenerative nerve disorder that is somehow triggered by a viral infection. Pathologic changes include nerve cell damage and destruction of myelin sheath. There is no known cure.
(27 Sep 1997)
progressive tapetochoroidal dystrophy An x chromosome-linked abnormality characterised by atrophy of the choroid and degeneration of the retinal pigment epithelium causing night blindness.
(12 Dec 1998)
progressive torsion spasm A genetic, environmental, or idiopathic disorder, usually beginning in childhood or adolescence, marked by muscular contractions that distort the spine, limbs, hips, and sometimes the cranial-innervated muscles. The abnormal movements are increased by excitement and, at least initially, abolished by sleep. The musculature is hypertonic when in action, hypotonic when at rest. Hereditary forms usually begin with involuntary posturing of the foot or hand (autosomal recessive form ) or of the neck or trunk (autosomal dominant form ); both forms may progress to produce contortions of the entire body.
Synonym: progressive torsion spasm, torsion disease of childhood, torsion dystonia, Ziehen-Oppenheim disease.
(05 Mar 2000)
progressive vaccinia A severe or even fatal form of vaccinia occurring chiefly in subjects with an immunologic deficiency or dyscrasia and characterised by progressive enlargement of the initial and also of secondary lesions.
Synonym: vaccinia gangrenosa.
(05 Mar 2000)
hereditary progressive arthro-ophthalmopathy Autosomal dominant arthro-ophthalmopathy associated with progressive multiple dysplasia of the epiphyses, overtubulation of long bones, cleft lip and palate, hypermobility of joints, flattened vertebral bodies, pelvic bone deformities, and deafness.
Synonym: Stickler's syndrome.
(05 Mar 2000)
supranuclear palsy, progressive A progressive neurological disease usually of the fifth decade characterised by supranuclear ophthalmoplegia especially paralysis of downward gaze, pseudobulbar palsy, gait disturbance, dysathria, truncal dystonia, memory and personality deterioration, and dementia.
(12 Dec 1998)
diaphyseal dysplasia, progressive Progressive thickening of diaphyseal cortex of long bones.
(12 Dec 1998)
infantile progressive spinal muscular atrophy Transmitted as autosomal recessive on chromosome 5q. Progressive dysfunction of the anterior horn cells in the spinal cord and brainstem cranial nerves with profound weakness and bulbar dysfunction occurring in the first two years of life. Three groups, based on age of clinical onset, are recognised.
Synonym: familial spinal muscular atrophy, Hoffmann's muscular atrophy, infantile muscular atrophy, infantile progressive spinal muscular atrophy, progressive infantile spinal muscular atrophy, Werdnig-Hoffmann disease, Werdnig-Hoffmann muscular atrophy.
(05 Mar 2000)
ophthalmoplegia, chronic progressive external One of the mitochondrial encephalomyopathies characterised by slowly progressive paralysis of the extraocular muscles. Muscle biopsies disclose the characteristic ragged red fibres and large numbers of mitochondria with deleted DNA.
(12 Dec 1998)
ovine progressive pneumonia A chronic, progressive, contagious interstitial pneumonitis of sheep in Europe and the U.S. Caused by a "slow virus" (family Lentiviridae); it is now believed that maedi and visna are two histopathological and clinical manifestations of the same viral infection.
Synonym: ovine progressive pneumonia.
Origin: Icelandic, dyspnea
(05 Mar 2000)
traumatic progressive encephalopathy A chronic progressive brain damage resulting from multiple brain injuries, e.g., dementia pugilistica.
(05 Mar 2000)
essential progressive atrophy of iris Progressive atrophy of the iris without inflammatory signs, characterised by patchy loss of all layers of the iris with hole formation, migration of the pupil, degeneration of the corneal endothelium, peripheral anterior synechiae, and secondary glaucoma; usually unilateral, predominantly affecting women in their middle years.
(05 Mar 2000)
lenticular progressive degeneration <gastroenterology, neurology> An inherited (autosomal recessive) disorder where there is excessive quantities of copper in the tissues, particularly the liver and central nervous system. Wilson's disease causes the body to absorb and retain copper. The copper deposits in the liver, brain, kidneys and eyes. Complications include dementia and liver failure.
Symptoms include jaundice, vomiting, tremors, weakness and slow stiff movements. Blood tests show serum ceruloplasmin is low. Medications are given to remove the excess copper from the body. Even with life-long treatment, disabling (and life-threatening) side effects are common.
Inheritance: autosomal recessive.
(27 Sep 1997)
leukoencephalopathy, progressive multifocal Rare demyelinating disease of the central nervous system which develops in immunocompromised patients secondary to lymphoproliferative disease, immunosuppressive therapy, autoimmune disorders, or aids. It is caused by the jc virus, a polyomavirus.
(12 Dec 1998)
benign familial chorea A rare, nonprogressive movement disorder characterised by chorea and athetosis appearing in early childhood, most commonly manifested as gait ataxia and upper limb coordination. Intellect is unaffected. Probably autosomal-dominance inheritance with incomplete penetrance.
(05 Mar 2000)
ÀÌ ¾Æ·¡ ºÎÅÍ´Â °á°ú°¡ ¾ø½À´Ï´Ù.
KMLE ¾àǰ/ÀǾàǰ ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • Á¦Ç°¸í
    ¼ººÐ/ÇÔ·®
    ±¸ºÐ/º¸Çè±Þ¿©
KMLE ¾àǰ/ÀǾàǰ À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • Á¦Ç°¸í
    ¼ººÐ/ÇÔ·®
    ±¸ºÐ/º¸Çè±Þ¿©
¾Ë±â½¬¿î ÀÇÇпë¾îÇ®ÀÌÁý, ¼­¿ïÀÇ´ë ±³¼ö ÁöÁ¦±Ù, °í·ÁÀÇÇÐ ÃâÆÇ ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
¾Ë±â½¬¿î ÀÇÇпë¾îÇ®ÀÌÁý, ¼­¿ïÀÇ´ë ±³¼ö ÁöÁ¦±Ù, °í·ÁÀÇÇÐ ÃâÆÇ À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
´ëÇÑÀÇÇù Çʼö ÀÇÇпë¾îÁý »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
´ëÇÑÀÇÇù Çʼö ÀÇÇпë¾îÁý »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
¿¾ ´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
¿¾ ´ëÇÑÀÇÇù 2 ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
¿¾ ´ëÇÑÀÇÇù 3 ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
´ëÇÑÇØºÎÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
´ëÇÑÇØºÎÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
´ëÇѽŰæ¿Ü°úÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
    ÇÑÀÚ
´ëÇѽŰæ¿Ü°úÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
    ÇÑÀÚ
´ëÇѱâ»ýÃæÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
´ëÇѱâ»ýÃæÇÐȸ ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
´ëÇÑ»ýÈ­ÇкÐÀÚ»ý¹°ÇÐȸ ¿ë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
´ëÇÑ»ýÈ­ÇкÐÀÚ»ý¹°ÇÐȸ ¿ë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
KI ÀÇÇпë¾î »çÀü °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
KI ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
KMLE ÀÇÇоà¾î »çÀü ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
KMLE ÀÚµ¿ÃßÃâ ÀÇÇоà¾î »çÀü ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
ÀÇÇÐ³í¹® ¾àÀÚ(Pubmed/Entrez) °Ë»ö ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
Çѱ¹Ç¥ÁØÁúº´»çÀκзù ¾àÀÚ ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ÄÚµå
    ¿µ¹®
    ÇѱÛ
Çѱ¹Ç¥ÁØÁúº´»çÀκзù ¾àÀÚ À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ÄÚµå
    ¿µ¹®
    ÇѱÛ
°æºÏ´ë Ä¡°ú´ëÇÐ ±¸°­³»°ú ±³½Ç »çÀü ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
    ¼³¸í
°æºÏ´ë Ä¡°ú´ëÇÐ ±¸°­³»°ú ±³½Ç »çÀü À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
    ¼³¸í
CancerWEB ¿µ¿µ ÀÇÇлçÀü ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
MeSH(Medical Subject Headings) ¸ÂÃã °Ë»ö (http://www.nlm.nih.gov) °á°ú : 0 ÆäÀÌÁö: 6
MeSH(Medical Subject Headings) À¯»ç °Ë»ö (http://www.nlm.nih.gov) °á°ú : 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - Merriam-Webster's ÀÇÇлçÀü ¸ÂÃã °Ë»ö (https://www.merriam-webster.com) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - Merriam-Webster's ÀÇÇлçÀü À¯»ç °Ë»ö (https://www.merriam-webster.com) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - A.D.A.M. Medical Encyclopedia ¸ÂÃã °Ë»ö (http://www.nlm.nih.gov) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - A.D.A.M. Medical Encyclopedia À¯»ç °Ë»ö (http://www.nlm.nih.gov) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - MedlinePlus Health Topics ¸ÂÃã °Ë»ö (http://www.nlm.nih.gov) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - MedlinePlus Health Topics À¯»ç °Ë»ö (http://www.nlm.nih.gov) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - µå·¯±×ÀÎÆ÷ ¾àÇÐ Á¤º¸ ¸ÂÃã °Ë»ö (http://www.druginfo.co.kr) °á°ú: 0 ÆäÀÌÁö: 6
Á¦Ç°¸í
ÆÇ¸Å»ç
º¸ÇèÄÚµå ¼ººÐ/ÇÔ·®
±¸ºÐ/º¸Çè±Þ¿©
¿ÜºÎ ¸µÅ© - µå·¯±×ÀÎÆ÷ ¾àÇÐ Á¤º¸ À¯»ç °Ë»ö (http://www.druginfo.co.kr) °á°ú: 0 ÆäÀÌÁö: 6
Á¦Ç°¸í
ÆÇ¸Å»ç
º¸ÇèÄÚµå ¼ººÐ/ÇÔ·®
±¸ºÐ/º¸Çè±Þ¿©
¿ÜºÎ ¸µÅ© - WebMD.com Drug Reference ¸ÂÃã °Ë»ö (http://www.webmd.com) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - WebMD.com Drug Reference À¯»ç °Ë»ö (http://www.webmd.com) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - Drug.com Drugs by Medical Condition ¸ÂÃã °Ë»ö (http://www.drugs.com) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - Drug.com Drugs by Medical Condition À¯»ç °Ë»ö (http://www.drugs.com) °á°ú: 0 ÆäÀÌÁö: 6
KMLE À¥ ¿ë¾î ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
KMLE À¥ ¿ë¾î À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
ÇÑ¿µ/¿µÇÑ »çÀü ¸ÂÃã °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
ÇÑ¿µ/¿µÇÑ »çÀü À¯»ç °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
  • ¿µ¹®
    ÇѱÛ
WordNet ÀÏ¹Ý ¿µ¿µ »çÀü °Ë»ö °á°ú : 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - American Heritage Dictionary ¿µ¿µ»çÀü ¸ÂÃã °Ë»ö (https://www.ahdictionary.com) °á°ú: 0 ÆäÀÌÁö: 6
¿ÜºÎ ¸µÅ© - American Heritage Dictionary ¿µ¿µ»çÀü À¯»ç °Ë»ö (https://www.ahdictionary.com) °á°ú: 0 ÆäÀÌÁö: 6
ÅëÇÕ°Ë»ö ¿Ï·á