{"id":9462,"date":"2009-12-05T20:49:42","date_gmt":"2009-12-05T18:49:42","guid":{"rendered":"http:\/\/www.lovendal.net\/wp52\/?p=9462"},"modified":"2009-12-06T13:41:53","modified_gmt":"2009-12-06T11:41:53","slug":"enigmatica-baterie-de-la-bagdad-veche-de-2-000-de-ani","status":"publish","type":"post","link":"https:\/\/www.lovendal.ro\/wp52\/enigmatica-baterie-de-la-bagdad-veche-de-2-000-de-ani\/","title":{"rendered":"Enigmatica baterie de la Bagdad, veche de 2.000 de ani"},"content":{"rendered":"<p><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2009\/12\/baterie-Bagdad-2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-9463\" title=\"baterie Bagdad 2\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2009\/12\/baterie-Bagdad-2.jpg\" alt=\"baterie Bagdad 2\" width=\"288\" height=\"225\" \/><\/a>Unii cercet\u0103tori au descoperit dovezi ale electricit\u0103\u0163ii \u00een sculpturile murale egiptene sau \u00een textele vechi. Cu toate c\u0103 nu sunt dovezi concrete care s\u0103 sus\u0163in\u0103 aceste teorii, exist\u0103 un anumit artefact despre care unii oameni de \u015ftiin\u0163\u0103 cred c\u0103 este un exemplu de surs\u0103 de energie electric\u0103. \u00cen ciuda aspectului banal, acest vas mic, nedecorat, ar putea schimba punctul de vedere oficial al oamenilor de \u015ftiin\u0163\u0103 asupra istoriei descoperirilor \u015ftiin\u0163ifice.<\/p>\n<p><strong>O descoperire surprinz\u0103toare<\/strong><\/p>\n<p>Obiectul, despre care se crede c\u0103 este o baterie veche de 2.000 de ani, a fost descoperit \u00een 1936 de ni\u015fte muncitori care lucrau la terasamentul unei c\u0103i ferate din zona Khujut Rabu, la sud-est de Bagdad. Bateria pare s\u0103 fi fost dezgropat\u0103 dintr-un morm\u00e2nt din perioada part\u0103 (247 \u00ee.Hr. &#8211; 228 d.Hr.). Atunci c\u00e2nd a fost descoperit\u0103, bateria era compus\u0103 dintr-un recipient oval din lut galben, \u00eenalt de 13 cm, \u00een interiorul c\u0103ruia se aflau o foi\u0163\u0103 de cupru rulat\u0103, o vergea de fier \u015fi c\u00e2teva fragmente dintr-un material asem\u0103n\u0103tor asfaltului de ast\u0103zi. Asfaltul fusese folosit pentru a sigila capetele de sus \u015fi de jos ale cilindrului de cupru, precum \u015fi pentru a fixa vergeaua de fier \u00een mijlocul cilindrului. Folosirea unui sigiliu din asfalt indica faptul c\u0103 obiectul a con\u0163inut c\u00e2ndva un lichid, dup\u0103 cum sugereaz\u0103 \u015fi urmele de coroziune de pe tubul din cupru, cauzate probabil de un agent acid, probabil o\u0163et sau vin.<\/p>\n<p>Artefacte similare au fost descoperite \u00een ora\u015fele \u00eenvecinate Seleucia (unde vasul con\u0163inea suluri de papirus) \u015fi Ctesiphon (unde con\u0163inea foi\u0163e rulate din bronz).<\/p>\n<p><strong>O baterie cu mii de ani \u00eenaintea descoperirii lui Volta (1800)<\/strong><\/p>\n<p>\u00cen 1938, arheologul german Wilhelm Konig, pe atunci director al Laboratorului Muzeului din Bagdad, a dat peste acest obiect ciudat sau peste o serie de obiecte (relat\u0103rile difer\u0103) \u00eentr-o cutie din subsolul muzeului. Dup\u0103 o examinare atent\u0103, \u015fi-a dat seama c\u0103 artefactul sem\u0103na foarte bine cu o pil\u0103 galvanic\u0103 sau o baterie electric\u0103 modern\u0103. Ulterior, Konig a publicat o lucrare, suger\u00e2nd c\u0103 obiectul era o baterie antic\u0103, folosit\u0103 probabil pentru galvanoplastia (transferul unei pelicule de aur sau argint de pe o suprafa\u0163\u0103 pe alta) aurului pe suprafe\u0163e din argint. A emis, de asemenea, teoria conform c\u0103reia mai multe baterii puteau fi ata\u015fate una de alta pentru a le spori efectul.<\/p>\n<p>Cea mai conservatoare datare a bateriei se consider\u0103 acum a fi perioada cuprins\u0103 \u00eentre anii 250 \u00ee.Hr. \u015fi 640 d.Hr., dar prima baterie electric\u0103 cunoscut\u0103, pila voltaic\u0103, a fost inventat\u0103 de fizicianul italian Alessandro Volta abia \u00een 1800. A\u015fadar, dac\u0103 aceasta era o baterie primitiv\u0103, de unde au avut p\u0103r\u0163ii din Antichitate cuno\u015ftin\u0163ele necesare pentru a o realiza \u015fi cum func\u0163iona aceasta?<\/p>\n<p><strong>Bateria antic\u0103 crea un curent cuprins \u00eentre 0,87 \u015fi 2 vol\u0163i<\/strong><\/p>\n<p>Dup\u0103 ce a citit lucrarea lui Konig, Willard F.M. Gray, inginer la General Electric High Voltage Laboratory din Pittsfield, Massachusetts, s-a hot\u0103r\u00e2t s\u0103 construiasc\u0103 \u015fi s\u0103 testeze o replic\u0103 a bateriei antice. C\u00e2nd a umplut vasul de lut cu suc de struguri, o\u0163et sau o solu\u0163ie din sulfat de cupru, a descoperit c\u0103 acesta genera un curent electric de aproximativ 1,5-2 vol\u0163i.<\/p>\n<p>\u00cen 1978, egiptologul Arne Eggebrecht, la vremea respectiv\u0103 director al Muzeului Roemer \u015fi Pelizaeus din Hildesheim, Germania, a realizat o replic\u0103 a bateriei din Bagdad \u015fi a umplut-o cu suc de struguri. Aceast\u0103 replic\u0103 a generat 0,87 vol\u0163i, pe care i-a folosit pentru a electroplaca o statuet\u0103 de argint cu un strat de aur av\u00e2nd grosimea de 1\/10 000 mm. \u00cen urma experimentului, Eggebrecht a speculat c\u0103 multe exponate antice din muzee despre care se crede c\u0103 ar fi din aur ar putea fi, de fapt, din argint placat cu aur.<\/p>\n<p>Mai multe replici ale artefactului din Bagdad au fost realizate \u00een 1999 de studen\u0163ii coordona\u0163i de dr. Marjorie Senechal, profesoar\u0103 de matematic\u0103 \u015fi istoria \u015ftiin\u0163elor la Smith College din Massachusetts. Studen\u0163ii au umplut un astfel de vas cu o\u0163et, iar acesta a produs 1,1 vol\u0163i. Judec\u00e2nd dup\u0103 aceste experimente, bateria din Bagdad era \u00een mod cert capabil\u0103 s\u0103 produc\u0103 o cantitate mic\u0103 de curent electric, dar se pune \u00eentrebarea la ce anume putea folosi acesta.<\/p>\n<p><strong><a href=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2009\/12\/baterie-Bagdad-1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-9464\" title=\"baterie Bagdad 1\" src=\"https:\/\/www.lovendal.ro\/wp52\/wp-content\/uploads\/2009\/12\/baterie-Bagdad-1.jpg\" alt=\"baterie Bagdad 1\" width=\"192\" height=\"220\" \/><\/a>La ce folosea o asemenea baterie antic\u0103?<\/strong><\/p>\n<p>Cea mai r\u0103sp\u00e2ndit\u0103 teorie este aceea emis\u0103 de Konig, anume c\u0103, atunci c\u00e2nd aceste pile erau legate \u00een serie, curentul generat era suficient pentru a galvanoplastia metalele. Konig a descoperit vase din cupru sumeriene placate cu argint, dat\u00e2nd din 2500 \u00ee.Hr. \u015fi a emis ipoteza c\u0103 acestea ar fi fost electroplacate cu ajutorul unor baterii similare celei descoperite la Khujut Rabu, de\u015fi nu s-a descoperit nicio dovad\u0103 a existen\u0163ei vreunor baterii sumeriene. Konig a subliniat faptul c\u0103 me\u015fte\u015fugarii din Iraqul de ast\u0103zi \u00eenc\u0103 folosesc o tehnic\u0103 primitiv\u0103 de galvanoplastie pentru a acoperi bijuterii din cupru cu un strat sub\u0163ire de argint. A considerat c\u0103 este posibil ca metoda s\u0103 se fi folosit \u00een perioada part\u0103 \u015fi c\u0103 ea s-a transmis de-a lungul anilor, \u00eentr-o form\u0103 \u00eentruc\u00e2tva diferit\u0103, tehnica este cunoscut\u0103 ast\u0103zi ca procesul numit poleire, prin care un strat de aur sau de argint este aplicat pe o bijuterie.<\/p>\n<p><strong>Baterie folosit\u0103 \u00een scopuri medicale<\/strong><\/p>\n<p>O alt\u0103 teorie prive\u015fte utilizarea electricit\u0103\u0163ii bateriei \u00een scopuri medicale. Vechile scrieri ale grecilor \u015fi romanilor indic\u0103 faptul c\u0103 lumea antic\u0103 avea cuno\u015ftin\u0163e destul de complexe despreelectricitate. Grecii men\u0163ioneaz\u0103 cum durerea putea fi tratat\u0103 prin aplicarea pe\u015ftilor electrici pe picioare. Suferinzii st\u0103teau pe un tipar electric p\u00e2n\u0103 c\u00e2nd piciorul inflamat amor\u0163ea. Pe\u015ftii-torpil\u0103 au dou\u0103 organe emi\u0163\u0103toare de electricitate plasate \u00een spatele ochilor \u015fi descarc\u0103 \u00eentre 50 \u015fi 200 vol\u0163i la 50 de amperi; folosesc acest curent pe post de arm\u0103, pentru a-\u015fi paraliza prada &#8211; pe\u015ftii mici care \u00eenoat\u0103 pe deasupra lor. Scriitorul roman Claudianus relateaz\u0103 cum un pe\u015fte-torpil\u0103 a fost prins cu un c\u00e2rlig din bronz \u015fi a emis un flux electric care s-a propagat prin ap\u0103 \u015fi de-a lungul firului, electrocut\u00e2ndu-l pe pescar.<\/p>\n<p>Conform scrierilor antice, medicii romani lipeau doi astfel de pe\u015fti de t\u00e2mplele pacien\u0163ilor pentru a trata o \u00eentreag\u0103 serie de boli, de la gut\u0103 p\u00e2n\u0103 la durerile de cap. Se \u015ftie, de asemenea, c\u0103 medicii babilonieni foloseau pe\u015fti electrici drept anestezic local. Grecii antici au descoperit unul dintre primele exemple de electricitate static\u0103; atunci c\u00e2nd au frecat ambr\u0103 (\u00een greac\u0103, electron) de o bucat\u0103 de blan\u0103, au descoperit c\u0103 ambra atr\u0103gea apoi pene, particule de praf \u015fi paie. Totu\u015fi, de\u015fi grecii au observat acest straniu efect, nu \u015fi-au dat seama ce anume \u00eel cauza \u015fi probabil l-au privit ca pe o curozitate. Dar nu toat\u0103 lumea este convins\u0103 de utilitatea practic\u0103 a acestei baterii \u00een tratarea durerii.<\/p>\n<p>Principala problem\u0103 privind utilizarea \u00een scopuri medicale este voltajul foarte redus pe care \u00eel produce bateria, asupra c\u0103reia unii au \u00eendoieli c\u0103 ar fi avut vreun efect remarcabil, except\u00e2nd o durere de foarte mic\u0103 intensitate. Cu toate acestea, dac\u0103 o serie de astfel de baterii erau legate \u00eempreun\u0103, se putea genera suficient\u0103 electricitate.<\/p>\n<p><strong>Putea fi folosit\u0103 bateria pentru electro-acopunctur\u0103?<\/strong><\/p>\n<p>Sus\u0163in\u00e2nd varianta utiliz\u0103rii \u00een scopuri medicale a bateriei de la Bagdad, Paul T. Keyser de la Universitatea din Alberta, Canada, a postulat o alt\u0103 utilizare a bateriei, bazat\u0103 pe descoperirea unor ace din bronz \u015fi fier \u00eempreun\u0103 cu alte dispozitive asem\u0103n\u0103toare bateriei, dezgropate la Seleucia, nu departe de Babilon. \u00centr-un articol publicat \u00een 1993, el sugereaz\u0103 c\u0103 acele puteau fi folosite pentru un tip de electro-acupunctur\u0103, tratament deja frecvent \u00een China la vremea respectiv\u0103.<\/p>\n<p><strong>Bateriile erau ascunse \u00een statui pentru a produce mici \u015focuri electrice?<\/strong><\/p>\n<p>Unii cercet\u0103tori sunt \u00een favoarea variantei folosirii ritualice a bateriei de la Bagdad. Dr. Paul Craddock, expert \u00een metalurgia istoric\u0103, angajat al Departamentului de Cercetare \u015etiin\u0163ific\u0103 al British Museum, a emis ipoteza c\u0103 mai multe astfel de baterii antice, legate \u00eempreun\u0103, puteau fi ascunse \u00een interiorul unei statui de metal. Adoratorii care intrau \u00een contact cu idolul primeau un mic \u015foc electric, similar celui provocat de electricitatea static\u0103, atunci c\u00e2nd d\u0103deau un r\u0103spuns gre\u015fit la o \u00eentrebare adresat\u0103 de preot, de exemplu. Poate c\u0103 aceste misterioase pi\u015fc\u0103turi erau considerate de adoratori drept dovezi ale magiei, iar puterea mistic\u0103 a respectivului preot \u015fi a templului sporea astfel \u00een mare m\u0103sur\u0103. Din nefericire, dac\u0103 astfel de statui nu sunt descoperite, utilizarea ritualic\u0103 a bateriilor r\u0103m\u00e2ne doar o alt\u0103 teorie fascinant\u0103.<\/p>\n<p><strong>Alte \u00eencerc\u0103ri de explica\u0163ii pentru folosirea bateriei<\/strong><\/p>\n<p>\u00cen ciuda testelor repetate cu replici ale bateriilor de la Bagdad, scepticii argumenteaz\u0103 c\u0103 nu exist\u0103 nicio dovad\u0103 c\u0103 aceste obiecte au func\u0163ionat vreodat\u0103 ca baterii electrice. Ei noteaz\u0103 faptul c\u0103 anticii despre care se crede c\u0103 au dezvoltat aceast\u0103 tehnologie, par\u0163ii, erau cunoscu\u0163i pentru vitejia lor \u00een lupt\u0103, dar nu \u015fi pentru realiz\u0103rile \u015ftiin\u0163ifice. De asemenea, scepticii atrag aten\u0163ia \u015fi asupra faptului c\u0103, \u00een ciuda documentelor istorice vaste din acea zon\u0103 \u015fi perioad\u0103, nu exist\u0103 nic\u0103ieri vreo men\u0163ionare cu privire la electricitate. De asemenea, nu exist\u0103 niciun artefact din perioada part\u0103 care s\u0103 fi fost electroplacat, dup\u0103 cum nu exist\u0103 nici dovada existen\u0163ei vreunor fire, conductori sau exemplare complete ale bateriilor antice.<\/p>\n<p>Unii cercet\u0103tori au contestat, de asemenea, experimentele cu replici ale bateriilor, sus\u0163in\u00e2nd c\u0103 nu au reu\u015fit s\u0103 recreeze rezultatele. \u00cen special experimentele dr. Arne Eggebrecht au fost \u0163inta atacurilor. Potrivit dr. Bettina Schmitz, cercet\u0103toare la Muzeul Roemer \u015fi Pelizaeus (aceea\u015fi institu\u0163ie \u00een care Eggebrecht \u015fi-a efectuat experimentele \u00een 1978 cu reproduceri ale bateriei), nu exist\u0103 fotografii sau documenta\u0163ii despre experimentele f\u0103cute de Eggebrecht.<\/p>\n<p><strong>O alt\u0103 explica\u0163ie: se foloseau bateriile pentru depozitarea sulurilor sacre?<\/strong><\/p>\n<p>O explica\u0163ie alternativ\u0103 favorizat\u0103 de sceptici cu privire la teoria bateriei electrice este aceea c\u0103 recipientele foloseau drept vase de depozitare pentru sulurile sacre, care con\u0163ineau probabil ritualuri scrise pe materiale organice, precum pergament sau papirus. Dac\u0103 aceste materiale organice au putrezit &#8211; sus\u0163in scepticii -, \u00een urma lor ar fi r\u0103mas reziduuri organice acide, care ar explica coroziunea cilindrului de cupru. Ei consider\u0103 c\u0103 un sigiliu din asfalt precum cel al bateriei de la Bagdad, nu foarte practic pentru o baterie galvanic\u0103, ar fi un sigiliu perfect pentru stocarea pe o perioad\u0103 foarte \u00eendelungat\u0103.<\/p>\n<p>Nu exist\u0103 niciun dubiu: bateriile de la Bagdad &#8211; chiar \u015fi \u00eenseriate &#8211; sunt ineficiente comparativ cu dispozitivele moderne. Dar r\u0103m\u00e2ne cert faptul c\u0103 dispozitivul nu func\u0163ioneaz\u0103 ca baterie electric\u0103. Probabil c\u0103, la fel ca \u00een cazul grecilor antici care foloseau ambra, creatorii acestui obiect nu \u00een\u0163elegeau bine principiul de func\u0163ionare. Dar acest lucru nu este neobi\u015fnuit. Multe inova\u0163ii, precum praful de pu\u015fc\u0103 \u015fi medicamentele pe baz\u0103 de plante, au fost dezvoltate \u00eenainte ca principiile lor fundamentale s\u0103 fi fost pe deplin cunoscute. Cu toate acestea, chiar dac\u0103 se va dovedi \u00eentr-o bun\u0103 zi c\u0103 artefactul de la Bagdad este o baterie electric\u0103, acest lucru nu va dovedi \u00een\u0163elegerea autentic\u0103 a fenomenului electric \u00een urm\u0103 cu 2 000 de ani.<\/p>\n<p>R\u0103m\u00e2ne de stabilit dac\u0103 bateria de la Bagdad a fost o descoperire izolat\u0103. S\u0103 fi fost creatorii s\u0103i singurii oameni din Antichitate care s\u0103 fi descoperit -probabil din \u00eent\u00e2mplare &#8211; electricitatea ? \u00cen mod clar, este nevoie de mai multe dovezi, fie ele literare sau arheologice, pentru c\u0103, dac\u0103 ne baz\u0103m pe cuno\u015ftin\u0163ele actuale, se pare c\u0103 aceast\u0103 baterie este singura descoperit\u0103.<\/p>\n<p>\u00cen mod tragic, \u00een 2003, \u00een timpul r\u0103zboiului din Iraq, bateria de la Bagdad a fost furat\u0103 din Muzeul Na\u0163ional, \u00eempreun\u0103 cu alte mii de artefacte antice nepre\u0163uite. Nu se \u015ftie unde se afl\u0103 \u00een prezent.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Unii cercet\u0103tori au descoperit dovezi ale electricit\u0103\u0163ii \u00een sculpturile murale egiptene sau \u00een textele vechi. Cu toate c\u0103 nu sunt dovezi concrete care s\u0103 sus\u0163in\u0103 aceste teorii, exist\u0103 un anumit artefact despre care unii oameni de \u015ftiin\u0163\u0103 cred c\u0103 este &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Enigmatica baterie de la Bagdad, veche de 2.000 de ani\" class=\"read-more button\" href=\"https:\/\/www.lovendal.ro\/wp52\/enigmatica-baterie-de-la-bagdad-veche-de-2-000-de-ani\/#more-9462\" aria-label=\"Cite\u0219te mai multe despre Enigmatica baterie de la Bagdad, veche de 2.000 de ani\">Cititi mai multe<\/a><\/p>\n","protected":false},"author":1,"featured_media":9463,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[55,2138,2623,1755,1063,1532,2624],"class_list":["post-9462","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-istorie","tag-arheologie","tag-bagdad","tag-baterie","tag-electricitate","tag-iraq","tag-istorie-si-civilizatii","tag-volta","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Enigmatica baterie de la Bagdad, veche de 2.000 de ani - Secretele lui Lovendal<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lovendal.ro\/wp52\/enigmatica-baterie-de-la-bagdad-veche-de-2-000-de-ani\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Enigmatica baterie de la Bagdad, veche de 2.000 de ani\" \/>\n<meta property=\"og:description\" content=\"Unii cercet\u0103tori au descoperit dovezi ale electricit\u0103\u0163ii \u00een sculpturile murale egiptene sau \u00een textele vechi. 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