10 zaujímavostí o zlate, ktoré ste možno nevedeli

Ťažko hľadať blyšťavejší, trvanlivejší a tradičnejší symbol bohatstva, než akým je zlato. Veď tento žiarivý kov fascinuje ľudstvo už celé tisícročia – a čím stúpa jeho rýdzosť, tým stúpa aj takzvaná zlatá horúčka. Tradičné je zlato aj z pohľadu investície, na rozdiel od iných komodít totiž nestráca na hodnote.

zlato_2020

 A čo viac, spája v sebe množstvo pôsobivých zaujímavostí...

Návrat do minulosti

Zlato sa vo svojich náleziskách vyskytuje v podobe čistého kovu. Vďaka tomu nikdy neboli žiaduce náročné technológie k jeho získaniu. Preto niet divu, že opracované zlato sa objavuje už v nálezoch z doby 6000 pred našim letopočtom. V obľube ho mali hlavne starí Egypťania. Len v slávnej Tutanchamónovej hrobke sa ho našlo 9 ton.

Zlato v oceánoch

Odhaduje sa, že v moriach a oceánoch sa nachádza až 20 000 ton zlata, teda že každý liter vody obsahuje zhruba 13 miligramov tohto drahého kovu. Nápadov, ako zlato od vody oddeliť, zaznelo v minulosti už veľa, žiadny z nich sa však doteraz neosvedčil ako ekonomicky zárobkový a efektívny.

Nehrdzavie, nestráca lesk a nekoroduje

Zlato nehrdzavie a v podstate je nezničiteľné, rozpustí sa len v roztoku lučavky kráľovskej alebo v kyanide draselnom, podmienkou je prítomnosť vzduchu pri tejto chemickej reakcii. Odolá však akejkoľvek kyseline alebo soli, snáď aj preto je označované za „večné“. Zlato je tiež veľmi kujné, pretože jeden jediný gram tohto kovu by sa dal roztepať do plechu o ploche jedného metru štvorcového.

Zlatá, modrá aj purpurová

Zlato nemusí byť len klasicky žlté, existuje množstvo rôznych zliatin. Tak napríklad purpurové vzniká zliatinou zlata a hliníku, červené je kombináciou zlata a medi, naopak modrý odtieň sa získava zliatinou zlata a ocele. Biele zlato vzniká väčšinou pridaním paládia, ktoré prírodné zlato intenzívne odfarbí.

Najväčšia zlatá tehlička

Vôbec najťažšia zlatá tehla má rovných 250 kilogramov a japonská spoločnosť Mitsubishi Materials Corporation ju nechala odliať 11. júna 2005. Ani tak ťažká tehla mimochodom nemá nijak monštruózne rozmery – ide „len“ o 45,5 x 22, 5 x 17 cm.

14, 18 alebo 22 karátov?

Rýdze zlato má 24 karátov. V tejto podobe je ale príliš mäkké a na výrobu šperkov nepraktické. Preto sa obvykle mieša s inými kovmi, aby získalo vyššiu tvrdosť. V Ázii sa používa pre zlaté šperky 22-karátové zlato, zatiaľ čo na západe je obvyklé 14-karátové. 18-karátové sa využíva pre pozlátené šperky.

Hodiny k nezaplateniu

Najdrahším výrobkom zo zlata sú vreckové hodinky Patek Phillipe, ktoré sa v roku 2014 predali prostredníctvom aukcie za 24,4 miliónov dolárov. Najčistejšie vyrobené zlato sa pýši rýdzosťou siedmich deviatok – 999,9999 a používa sa k chemickým účelom.

Tehličky, mince alebo medaile?

Investícia do trblietavého kovu sa bezpochyby vyplatí. Ide o sto rokov preverenú, nestarnúcu, a naviac v podstate nezničiteľnú hodnotu, ktorej cena z dlhodobého hľadiska stále rastie. Cenné sú však nielen tehličky, ale aj medaile alebo mince. „Nie je sa čomu diviť, mince v sebe nesú nielen hodnotné umelecké dielo, ale tiež mapujú časovú os ľudstva,“ vysvetľuje Jaroslav Černý, marketingový manažér Českej mincovne. Vôbec najdrahšou mincou sa stalo zlatých dvadsať dolárov, ktoré boli v aukčnej sieni Sothebys and Stacks v New Yorku vydražené za neuveriteľných 7 590 000 amerických dolárov.

Zlato vo vesmíre

Zlato si cenia aj astronauti – avšak nie z estetického, ale predovšetkým  z praktického hľadiska. Priezory v ich helmách sú zvnútra potiahnuté tenkou zlatou fóliou, ktorej zmyslom je chrániť zrak astronautov pred slnečným žiarením, ktorého účinky sú mimo atmosféru našej planéty doslova smrtiace.

TIP: Ak túžite po investícii s tradičným symbolom Slovenska, Česká mincovna si pre vás pripravila investičnú mincu Orol 2021. Reverznej strane kraľuje orol skalný, ktorý je symbolom Tatier, ktorého dopĺňa v pozadí za ním horský štít Kriváň. Averzná strana je posiata ornamentami čičmanského vzoru, ktorý je typickým doplnkom slovenskej ľudovej architektúry. Vďaka umeleckému spracovaniu môže byť minca využitá aj ako originálny a hodnotný darček napr. k narodeninám, narodeniu dieťaťa, promócii či svadbe. Pre viac informácií navštívte web: www.ceskamincovna.sk

1 Komentár

  • Komentár none %AM, %21 %099 %2025 %01:%mar napísal none

    The solution is easy; by bringing the bar down to the top of the chest, you'll find a
    way to alleviate neck and shoulder stress and maximize
    the recruitment of the focused muscle – the latissimus dorsi.
    These muscle tissue act like a weightlifting belt to
    assist your lumbar backbone as you lean forward to perform your rows.

    Purposefully partaking your core, a maneuver known as bracing, makes
    reverse grip rows a a lot safer train. Identified
    because the biceps for short, this muscle is situated on the entrance of your higher arm and
    is answerable for the flexion of the elbow joint. The reverse or underhand grip puts
    the biceps in a really favorable place. As such, you might discover you
    presumably can raise heavier weights or do more reps than with overhand rows.

    Other muscle tissue that are also engaged include the rhomboids, trapezius, and erector spinae.
    By understanding the anatomy involved with this
    train, you can maximize your vary of movement and
    reap all of its benefits. Additionally, there are various exercises that work related muscular tissues if you want to swap up your routine.
    Nonetheless, there are numerous variations and alternative workouts that may assist you to challenge your self additional and
    work your again in numerous ways. Start by standing behind the
    barbell, gripping it firmly with an overhand grip about shoulder-width other than each other.
    This variation requires access to an Olympic barbell and wide
    grip deal with attachments (or two separate bars).

    In the same method the incline bench press matches between the bench press and shoulder
    press, the machine excessive row lays somewhere in the
    midst of a seated back row and a pull-up. You’re not pulling immediately in entrance of you (horizontal pull) or nor instantly above (vertical pull); somewhat, you pull down at
    an angle. This difference within the motion pattern will present a bit of a different stimulus to maintain things fascinated and your muscular tissues educated.
    The machine excessive row is a incredible pulling exercise to train your again muscular tissues and biceps.
    As the movement occurs on the shoulder and elbow,
    it's a compound movement, that means it will practice plenty of muscle mass
    and allow heavy masses.
    Related to the attachment you choose, how high you set the
    cable may also determine which muscular tissues you activate.
    I selected this option as a outcome of the narrower grip offers optimal
    lat activation during the exercise, which is what I wanted particularly for my
    personal objectives. Nonetheless, in addition they work other
    muscles, similar to the middle trapezius, rhomboids, and rotator cuff
    muscles. This exercise provides individuals with shoulder issues with an exercise to profit from
    rows. You can even add resistance by sporting a weighted vest, which
    will increase the quantity of weight you have to carry
    with each rep. Every arm must be labored separately by finishing 10 reps per side, or alternating arms
    every 5 reps if desired. You have to focus on squeezing your lats collectively each single repetition somewhat than just relying solely upon momentum.

    The wide-grip seated cable row strengthens
    the again, shoulders, and biceps while improving core stability and spinal alignment.
    The broad grip locations increased resistance on the higher back and
    rear shoulder. To start, firmly grip either facet of the bar with hands placed barely wider than shoulder width aside.
    Have Interaction your core and glutes then drive your elbows
    down towards your ribs whereas pulling your chin above the extent of the bar utilizing strength from lats and mid-back
    muscular tissues only – no swinging!
    To carry out this train, sit dealing with away from a cable
    machine with one end of an attachment in every hand. To carry out this exercise, stand
    in entrance of the barbell along with your feet shoulder-width aside and grip it simply outside of hip width.
    Low row workout routines are effective, yet easy workouts that can be utilized to target multiple muscle
    tissue in your back. Patrick Dale, PT, ex-Marine, is
    a Training Editor with 30 years of experience in Private Coaching and Strength & Conditioning.
    A former British Royal Marine, health club owner, and fitness skills assessor, he is dedicated to delivering informative, reliable content.
    In addition, Patrick is an skilled writer who has authored three
    health and exercise books, dozens of e-books, thousands of articles, and a
    variety of other fitness videos. He’s not simply an armchair health expert; Patrick practices what he preaches!

    1) The first thing you’ll must do is adjust the seat height, thigh pads, and chest pad.
    In comparison with other back workouts such as the Bent Over Row the Cable Row places much less strain on the
    decrease back. Sign as a lot as join our newsletter to obtain the
    newest information including exclusive reductions.
    Brett Williams, NASM-CPT, PES, a senior editor at Men's Health, is a certified coach and former pro
    football participant and tech reporter. You can find his work
    elsewhere at Mashable, Thrillist, and other outlets. To obtain StrengthLog at no cost, use the button in your gadget beneath.

    As you inhale, slowly transfer the V-handle again to the preliminary place.

    The most commonly used one for the seated
    cable row is the V-grip attachment. With the V-grip, you place most of the concentrate on the mid-traps and the rhomboids
    (the middle back). Nonetheless, if you’re attempting to focus
    on the out lats and rear delts more, then you’re better off going with a curved bar and a
    wider grip. The downside, nonetheless, is that because the weights gets heavier, many people discover using
    a supinated grip aggravates the tendons in their elbows and shoulders.
    They target the lats and rhomboids in particular,
    but also contain other muscle tissue just like the traps and rear delts.

    If nothing else, switching to an underhand grip
    will allow you to do extra reps or lift slightly extra weight than traditional.

    Reverse and overhand grip rows are so related that they are interchangeable.

    The only real difference is the quantity of biceps engagement, with the reverse grip placing your biceps in a
    stronger position. This is wonderful news for anyone who does
    body weight or resistance band coaching, the place high reps are the norm.
    Nonetheless, excessive reps are less useful for constructing energy, the place heavy weights (85%+
    of your one-repetition maximum) are finest. One Other unique excessive row alternative
    can be a excessive row variation.
    Evaluate that to a cable row, particularly if carried out
    with an underhand grip, which is going to hit the mid-back,
    and even low back muscles to a higher degree. In this publish, we’ll briefly discuss the seated cable row and how it works, and then what makes for
    a great various. We’ll record these workout routines and the way to do every, together
    with their advantages, variations that affect the muscles they work,
    and perfect rep ranges to actually reap the benefits of these movements.
    Rows are the ultimate word train for building the higher again, and cable rows are
    second to none amongst them. The seated cable row is a stellar
    train because it presents lots of options when it comes to grip and positioning that permit you to hit the again from
    multiple angles, maximizing muscle recruitment.
    In other words, any variation of the row is right, and you’ll see a lot of them here.
    We’ll embrace barbell and dumbbell-based movements, and some band and TRX based
    mostly movements. Learn on to learn about options to
    the seated cable row that will have your again getting wider,
    thicker, and extra defined very quickly. The back muscle
    groups are the primary goal nonetheless the arms work to stabilise
    and pull the burden as properly, so that
    they will also develop and enhance. Utilizing momentum to swing a weight upwards tends to be widespread but it throws off the
    whole motion, Jesse Feder, CSCS, mentioned. People are inclined
    to swing when the weight could be very heavy (as a method to make use of momentum to deliver it up
    faster), however Feder said upright rows aren't meant to be a low-rep, high-weight exercise.

    Make positive you use a weight that lets you full all of the
    reps with good type, even when close to failure. In the advanced
    model of this move, folks typically move too shortly without deliberate movement.

    Suppose about stretching by way of the upper back as you stretch ahead,
    not the lower. Stretching by way of the decrease back an extreme amount of can create a rocking movement you
    don't need.
    If you've ever seen it referred to as a Hammer Energy excessive row and puzzled why here’s why.
    Hammer Power is among the premier power and conditioning firms
    that produce excellent tools for machine exercises.

    They are particularly famous for their row machines as they've a large variety, together
    with the high row. Yes, the exercise is a protected approach
    to build strength and muscle within the again and arms. The t-bar row is like
    a extra secure model of the barbell row, nevertheless it nonetheless requires more core
    activity and static work in your legs than the cable row variants.
    The rear delts work as stabilizer muscle tissue, making certain proper scapular retraction and
    enhancing shoulder well being. Whereas the
    Seated Cable Row primarily targets your back muscle
    tissue, it also engages your shoulders to a point, notably the posterior deltoids.

    Additionally, both muscle groups contribute to improved posture by serving to maintain your spine aligned properly throughout the train.
    Additionally, improved posture helps cut back pressure on different parts
    of the body such as the neck and shoulders that could be
    attributable to poor postural habits or extended sitting in one
    position. Here are a few of our coaching packages that feature the barbell row.

    By setting your scapula before you row, you’ll discover that your lats have interaction extra effectively,
    leading to higher muscle activation and development. This prevents
    your forearms and wrist flexors from initiating the
    pulling motion, maintaining the load in your back muscle tissue.
    If you’re seeking to build a thick, sturdy back, the seated cable row
    should be a staple in your routine.
    The seated cable row, as talked about in the introduction, is performed on a cable pulley machine.
    Nonetheless, it can also be carried out by sitting on the ground or by
    organising a bench in the cable matrix if yours does
    not. Initiate the motion by reaching down to pick up
    the dumbbell off the ground with the alternative hand whereas preserving your again straight and aligned.

    Interact your back and shoulders, lifting the dumbbell up to your chest.
    Once you attain the top of the exercise, squeeze your shoulder again and be certain to feel the
    engagement in your back muscle tissue. This isn’t based
    mostly on any sound scientific reasoning, though, and is actually just fitness center lore.

    Not solely will you narrow in on your back muscular tissues, however you may also
    problem your biceps and grip strength more than you'd think.
    As Quickly As you progress into the superior model of the
    row, your low again extensors also play a task.
    Whether you choose a V-handle, straight bar, or rope cable row
    substitute, ensure it aligns with your aim of engaging the latissimus dorsi and stabilizer muscular
    tissues. In this listing, we will focus strictly on variations using
    the cable pulley machine. The seated cable row
    is primarily a back train and is understood amongst many gym-goers as
    a carry that can allow you to build back muscle thickness and strength.
    Novices, intermediates, and professional bodybuilders all profit from
    utilizing the seated cable row to build again muscle and energy.


    Rowing workout routines can target totally different muscle teams relying on the type of row that is carried out.
    In this weblog post, we’ll focus on rows muscle tissue labored, fundamental anatomy
    of the rowing motion, types of rows and variations in addition to
    different workouts for working the identical muscle tissue as rows.
    Whether Or Not you’re seeking to construct energy or add
    selection into your exercise routine – understanding what’s involved in rowing can help
    maximize results. They goal the muscle tissue of the upper and mid-back, serving to to construct
    strength and improve posture. The train additionally helps to
    reduce strain on the decrease again by taking stress off it through the motion. Additionally, as a
    end result of you’re in a seated place along with your
    chest supported, you presumably can focus more on correct kind and
    approach whereas nonetheless getting an efficient exercise.
    The latissimus dorsi, or lats, are the largest muscles in the
    back and are answerable for shoulder extension and adduction.
    With this exercise, your upper physique is absolutely supported,
    so your lower back is completely faraway from the movement.
    This leaves you free to focus on pushing your upper again to its limit.
    Some lifters might discover that reverse grip rows place more stress on their
    forearms and wrists than standard rows. They may even be uncomfortable,
    particularly if you have tight biceps. If you feel this exercise more in your arms than your lats, you may be
    higher off utilizing a impartial or overhand grip.
    You’ll follow maintaining your again in a straight and upright position, somewhat than hunching forward and compromising your
    type. You’ll additionally decrease stress on your
    decrease back and hamstrings whereas nonetheless hitting those main back muscles.


    Yes, novices can carry out rear delt rows, however it’s important to start out with a lighter weight and focus on correct type.
    Rear Delt row is a really effective and useful
    train for constructing muscle and power within the rear
    deltoids and higher back. Nonetheless, even though they might look
    the identical, seated rows with a resistance band aren’t nearly as good as seated rows accomplished on a
    cable row machine. In that case, you may wish to avoid unsupported bent-over rows and stick to actions like seated cable rows
    and chest-supported rows, which are far more decrease back-friendly.
    While reverse grip rows are extra lower-back-friendly than regular bent-over rows, the decrease again continues to be strongly concerned.


    When it involves programming, this is a nice exercise to incorporate on either a back day or
    a pull day if you’re doing a push/pull/leg break up.

    Then you may want to think about beefing up your again muscles—and do we've the train for you.
    And we'll ship you evidence-based methods to improve your physique composition and well being as properly as unique deals
    and reductions. This allows them to not only evaluate individual research but in addition analyze the overall weight of the evidence on any and all matters associated to diet, exercise, supplementation, and more.
    A good way to do that is to try totally different grip widths
    and deal with attachments till you find two or extra that you simply like, then alternate between your favorites each 8-to-10 weeks of training.
    They are essential to control and shift the burden through the pull.
    This will help to get rid of and drive from momentum and maximise
    time beneath pressure.

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