Koral

Ružové koralové perličky z obdobia staršej doby kamennej boli objavené v jaskyni Wildscheier v Nemecku. Z mladšej doby kamennej sa na území Európy našli bežné koralové predmety a šperky. Za symbol šťastia a nesmrteľnosti ho považovali starovekí  Egypťania a Sumeri. 

klenoty muzeum kroalov

Koraly pozostávajú z jednotlivých živočíchov - polypov, ktoré vylučujú vápenec. Ako staré polypy odumierajú, na ich úlomkoch vápenatých ulít, nové polypy budujú svoje stavby a tak postupne vzniká korálový útes. Veľká útesová bariéra je najväčší koralový útvar, ktorá sa tiahne 2300 km pozdĺž pobrežia Austrálie.  Dnes poznáme viac než šesť tisíc rôznych koralov, z ktorých sa asi 150 nachádza v teritoriálnych vodách Ruska.

V minulosti mu boli pripisované liečivé účinky. Plinius Starší považoval koralový prášok za liek na dnu, choroby zažívacieho traktu a močového mechúra. Avicena (Abú Sína) odporúčal koral na choré oči a počas stredoveku ľudia verili, že obnovuje krvný obeh, znižuje teplotu a zároveň človeku dodáva múdrosť. Používal sa aj ako narkotikum, keď koralový prášok zmiešali s vínom.

Koral v službách klenotníkov

Bol vhodným materiálom na opracovávanie, preto si ho obľúbili výrobcovia šperkov. Na klenotnícke výrobky sa do dnešných dní využíva 16 druhov koralov, z nich najhodnotnejší je červený koral. Jeho sfarbenie má rôzne odtiene.

Svetlo ružový koral (anjelská pokožka) patrí medzi najdrahšie koraly. Tmavočervený koral vzniká len pri určitej teplote a slanosti vody, preto jeho výskyt je vzácny. Vyskytujú sa v Stredozemnom, Červenom a Japonskom mori a nájdeme ich v tropickej oblasti Tichého oceánu.  Najväčšie kolónie ušľachtilých korálov  boli zaznamenané v Stredozemnom mori pri alžírskom pobreží v hĺbke 80 až 110 metrov.

Okrem typického zafarbenia do červena sa v šperkárstve využívajú biele koraly (niekedy sa dofarbujú) a čierne koraly (negri) rozšírené v Červenom mori  a Indickom oceáne. Azúrové koraly (modré) sú veľmi vzácne a vyskytujú sa pri africkom pobreží. Celkom mineralógovia rozoznávajú 350 odtieňov koralov, ale ich farba nemusí byť  nemenná, ako aj ich lesk, ktorý sa vytráca.

Zaujímavosti...

... okrem prisudzovaných liečivých účinkov naši predkovia verili v kúzelnú moc koralov, preto boli vyhľadávané koralové amulety a náhrdelníky.

.. po prijatí kresťanstva ich nahradili koralové krížiky, ktoré veriaci nosili priamo na tele.

... v stredoveku ho považovali za symbol skromnosti.

...v Číne a v Indii si ho cenili viac ako perly, smaragd či rubín.

Foto: Klenoty egyptskej kráľovnej (Múzeum koralov)

2 komentárov

  • Komentár git.francoacg.com %AM, %27 %226 %2025 %04:%mar napísal git.francoacg.com

    When utilizing a squat rack, the aim is to take
    as few steps as essential through the walkout to retain as
    much power as attainable for the precise carry. When using a monolift, the focus should
    be establishing a stable brace and standing up properly with the barbell.
    With a wide stance, the main target is mainly on the anterior chain,
    with lateral pressure production playing a big
    function. When using a standard stance, both the posterior and anterior chains
    are evenly used to execute the squat. When using a detailed
    stance, the focus is positioned on the anterior chain. Whereas there may be
    some guidelines utilized to resolve which stance is greatest for an athlete, the truth is that it
    all depends on the person and what the athlete finds most
    useful.
    The HLM coaching style is extraordinarily versatile and can be used
    to accommodate many training targets. This is a 10 week deadlift program
    designed for building up work capability during the competitive
    off-season. With that mentioned, a 6-day exercise break up could also be the best choice
    for superior trainees wanting to proceed gaining dimension and/or energy.
    Let’s face it, some folks benefit from the health club so
    much that they want to be there each single day. So if you’re a health
    club rat or an advanced lifter trying to maximize results, a 6-day workout
    cut up is one thing you must contemplate. This exercise will strengthen your hip,
    again, and core muscles and give you the energy to extend your hips in the
    squat and the deadlift.
    Furthermore, powerlifting programs will give you a excessive quantity of practice with the squat, bench press, and deadlift, together with a quantity of variations of these exercises.
    The idea is to develop specific power in these movements (and
    solely these movements), and also work on weak parts inside the vary of movement.
    I'm going to undergo every of the primary lifts
    and the variations you'll use in this powerlifting program.
    Then, we’ll go through the exercises you’ll use on the fourth day
    of our powerlifting programs to deal with specific muscle tissue and tissues
    very important for optimal performance. Atlas Rising is an advanced 7 week powerlifting program
    with 3 training days per week.
    For more skilled trainees, a program just like the advanced choice may help enhance
    your 1RMs, working towards new PRs for the large
    lifts. They assist build a strong basis in the big three lifts and you may develop power from there.
    Form is something that shortly will get forgotten about as weights improve, leading to unhealthy habits, and unfortunately, many coaching injuries.
    The danger of harm is highest when attempting to carry
    maximal weights.
    This is decided by the person trying to begin a powerlifting routine.

    Utilizing static holds to construct strength in these specific points can be used to break through them at a given weight.
    Outside of the fitness center, some individuals battle to stick to
    their rest days between workouts. Both packages are progressive in nature, to
    permit them to be adopted constantly with the finish result
    of accelerating energy in mind. This transfer should be carried out consistently both to construct pressing strength and to maintain long-term shoulder
    function. Be conscious that the quantity of weight
    lifted shall be less in a entrance squat due to the increased
    difficulty of holding the burden in front. The triceps are answerable for locking out the arms
    on the prime of a regular bench press.
    At this degree it isn't about ‘competing against
    another person', but simply doing one of the best you'll be able to in your own individual skills.
    Powerlifting is a quick rising sport and one of many greatest areas of progress we have
    seen is amongst scholar athletes. In 2024, for the first time,
    our student powerlifters competed beneath the FISU banner,
    bringing powerlifting to one more international multi-sport agency.
    At the top of the day, awards are presented to the lifters with the best
    squat, bench press, deadlift, and total
    within their division. A lifter's complete is determined by the sum of his/her greatest lifts, and the person with the best total is taken into account
    the all-around strongest lifter in his division.
    By studying the fundamental lifts, equipping yourself with the right
    gear, and following a structured program, you’ve already laid the groundwork for success.
    Keep In Mind, progress takes time, and every lift—no matter how small—moves you nearer to your targets.
    Mobility is the power to move freely and efficiently via a range of motion. It’s important for maintaining
    good form and stopping injuries in powerlifting.
    Each try and push past your previous personal bests seems
    like hitting a wall. This popular sport consists of strikes derived from powerlifting, Olympic lifting,
    strongman, and more. Workouts encompass a "WOD" or exercise of the day that everyone in the gym participates in with modifications to accommodate
    differing capability levels. Once More, powerlifting applications differ based on the components described on this article.
    A powerlifting warm-up should consist of a general warm-up to extend physique temperature adopted
    by progressively loading the target muscular tissues and joints for
    the session. After two phases of preparing the joints, connective tissues, and
    muscle tissue, there’s a deload week earlier than the final part of
    powerlifting workout routines. In addition to the core exercises above,
    there are dozens of other exercises on the market that might be
    beneficial to a given individual’s powerlifting workout program.

  • Komentár best steroid like supplements %AM, %24 %375 %2025 %08:%mar napísal best steroid like supplements

    Getting your heart fee up and building muscle is a superb approach to enhance levels of
    these essential hormones in women and men. The single-arm Smith
    Machine row requires the use of a Smith Machine,
    a specialized train machine with a single long bar.

    While standing, you position your self at a slight angle
    beside the Smith machine and pull the bar upwards, participating the back muscle tissue.
    The seated machine row is a traditional seated row performed on a machine.
    It primarily targets the center back, with a secondary concentrate on the biceps.

    The chest supported row is a superb exercise for focusing on the again muscle tissue.
    With variations of the exercise, you possibly can goal different muscle groups in your again similar to your lats, rhomboids, traps and
    rear delts. You can also use various exercises that
    work related muscular tissues like bent over rows or cable
    rows when you don’t have access to a chest supported row machine.
    Ultimately, it’s necessary to know which muscles
    are worked when doing chest supported rows in order that you know how greatest to incorporate them into your training program for max
    profit. This exercise targets a quantity of muscle groups together with lats, rhomboids, traps, biceps, forearms and extra.

    Guarantee that the core is straight, stable and stuck in space at
    all times. It will help with nearly each exercise that exists and
    the Cable Row will each take a look at and develop it.
    Variations just like the Single-Arm Cable Row and Standing Rope Cable Row offer alternative to Cable Rows that stop muscle imbalances and add core stabilization.
    Remember to begin the motion by bending those wrists back and bracing
    your scapula. By avoiding these common errors, you can be sure that your Seated Cable Row technique is strong, maximizing the advantages of this glorious cable train. Leaning too far ahead
    or backward can throw off your form and cut back the efficiency of the motion.
    The primary advantages of the seated row embody constructing upper body
    strength and firming the mirror muscles in your arms and chest.
    Different benefits include improvements in posture, grip power,
    and decreasing the chance of injury throughout different compound lifts.
    Though the biceps are energetic whereas performing seated cable rows, they should not
    be the primary focus of the train.
    If you purpose to have third-dimensional shoulders,
    then building up your rear delt is something you must emphasize.
    One Other main muscle group that the cable row works are the traps,
    also recognized as the trapezius. The trapezius is a rather massive superficial muscle on the upper back that is much like a trapezoid.
    Since the traps are responsible for scapular retraction, it’s heavily worked
    by the cable row. It’s important to note that there are three areas of
    the lure – higher, center, and lower fibers – each one performs a different action.
    The machine has certain advantages over free-weights because it allows you to work against the identical quantity of resistance while engaging the muscles evenly.
    Your trapezius muscles along the back of your neck, shoulders, and upper back are additionally involved in seated cable rows.

    This move additionally works the forearm and upper arm muscular tissues,
    as the biceps and triceps are dynamic stabilizers for this train. Other
    stabilizing muscular tissues that come into play are the hamstrings and gluteus maximus.
    Performing cable rows while seated on a bench eliminates the role of stabilizer muscle tissue to a fantastic
    extent, allowing you to focus in your lats. The seated cable row is a godsend for
    people who cannot really feel their lats have
    interaction whereas performing free weight exercises just like the dumbbell or
    barbell rows. The main muscle tissue labored during a chest supported row embrace the latissimus dorsi (lats), rhomboids,
    trapezius (traps), rear deltoids (shoulders) and biceps
    brachii (biceps).
    It entails using your individual body weight to carry out an inverted row, which
    targets the primary and secondary muscle tissue of the higher back.
    TRX rows are a wonderful train for building energy and firming your again muscular tissues.

    Sure, a straight-arm pulldown is an efficient train for strength coaching.
    Face pulls are another effective approach to goal
    related muscles as those used throughout a straight arm pulldown. The straight arm pulldown train is an efficient way to focus on the back muscular tissues.

    On the opposite hand, traditional bent-over barbell rows may provide a more full vary of movement and increased overall strength gains
    because of heavier masses being used. In The End, it is as
    much as each particular person to decide which variation most closely fits their wants and
    goals. The major muscular tissues used during chest supported rows are the
    latissimus dorsi, or lats. These giant muscles run from the lower back to the
    armpits and are answerable for shoulder extension and internal rotation of the arm.
    They also assist stabilize your torso throughout exercises
    like chest supported rows. Nonetheless, most T-bar row machines also have a
    large grip, and that’s good for working your rear deltoids and higher again.
    Also often recognized as the "barbell row," this variation of the seated row involves
    using a barbell as a substitute of a resistance band or cable machine.
    As A Substitute of sitting, you stay standing and bend over along with your ft
    shoulder-width apart. With the high-cable standing
    row variation, you stand in front of the cable machine and pull down as a substitute of again. This helps
    build energy in your latissimus dorsi and trapezius
    muscle tissue and images the entire body to take care of a straight standing place.
    The seated cable row makes use of a cable row machine as a substitute of a resistance band.
    This is the commonest variation of the seated row and a well-liked exercise machine on the gym.

    This will guarantee your muscles are activated for the
    complete course of the train. Sit on the bench with your knees bent and grasp the cable
    attachment (often a triangle deal with or a bar). Then position your self together with your knees barely bent, grabbing the
    deal with along with your arms.
    I see too many guys prioritizing weight over kind when performing this exercise.
    These muscular tissues additionally allow lateral flexion, which is the movement sample
    that allows you to bend your trunk to the facet.
    Additionally, they are concerned within the rotational
    movements of the spine, providing stability and adaptability.
    When you shrug your shoulders or increase your arms overhead, that’s your higher traps in motion. When diving
    into the back muscular tissues, don’t overlook the
    trapezius muscles, or "traps." Image them as a diamond draped over your upper back,
    with higher, center, and lower portions. The lats –
    or latissimus dorsi muscle tissue, if we’re getting technical – are the heavy hitters of your
    again.
    When carried out appropriately, they target each the pectoralis main and minor, as properly as the anterior
    deltoids. The suspension system lets you use your personal physique weight as resistance, which makes it suitable for all
    health levels. Return it downwards slowly, followed by
    the alternative arm alternating between them per repetition until the desired variety of reps or units have been completed.
    Decrease the burden again down slowly before repeating for desired reps or units.

    Now let’s have a look at some variations of the TRX Row
    to additional customize your workout routine. By
    understanding the anatomy of this exercise, you
    probably can create a more practical exercise tailor-made to your needs.

    Not solely will you narrow in on your again muscle tissue, however you'll
    also problem your biceps and grip power greater than you'd assume.
    Once you progress into the advanced model of the row, your low again extensors additionally play a job.
    Whether Or Not you choose a V-handle, straight bar,
    or rope cable row substitute, ensure it aligns together with your objective of partaking the latissimus dorsi and stabilizer muscles.
    In this record, we'll focus strictly on variations
    utilizing the cable pulley machine. The seated
    cable row is primarily a back exercise and is understood amongst many gym-goers as
    a lift that may allow you to construct again muscle thickness and strength.
    Newbies, intermediates, and skilled bodybuilders all benefit from using
    the seated cable row to build back muscle and energy.

    The seated machine row could be changed as a lot as maintain workouts recent, target muscles in another way, and permit for continued growth and power
    gains. Enable your shoulder blades slide ahead over your ribcage somewhat.
    You mustn't let them come up to now forward that the weight is pulling directly on your shoulder joint/connective tissue, or
    causing your torso to lean to far forward. A few units of band pull-aparts may also assist get
    up your shoulder stabilizers to make any higher physique workout more productive and safer.
    By utilizing your personal physique weight as resistance whereas suspended from a TRX
    strap or comparable gadget, you'll find a way to perform this
    exercise with minimal equipment in any setting.
    Once you’ve gotten all the way in which down, give your lats a
    squeeze whereas maintaining an upright posture. The seated cable row is a full-body movement, additionally
    relying on glute and core activation to be able to keep stability and an upright posture.

    Of course, when it comes to these secondarily engaged muscle
    groups, you’re going to should make an effort to activate
    them to their fullest potential. You can absolutely coast
    by way of this exercise without activating your glutes, but your kind (and gains) will endure over the lengthy run. In Distinction To many
    different compound back exercises, such as the barbell row and
    deadlift, the seated cable row doesn’t place much load on your
    backbone when carried out appropriately. The bulk of
    the muscle work gets done if you pull again on the shoulders.


    The cable rear delt row will become more of a regular wide-grip cable row.
    The chest-supported dumbbell rear delt row is a variation that gives enhanced stability and rear delt
    isolation in comparison with the standard model.
    The big advantage with the dumbbell row is that your weight is supported on the bench.
    As a result, you can concentrate on training the muscle tissue in your again with out fatigue within the spinal erectors forcing you to
    chop the set brief. If you want to focus more on the lats, use a relatively slim grip, keep your elbows close to your aspect and pull the bar into the decrease a
    half of the stomach.
    If you row the barbell greater in your chest, the exercise begins to resemble barbell rear delt rows.
    That will principally work your rear delts and the highest parts of your again, and
    never as much of your mid-back as common barbell rows do.
    At least, if your purpose for doing this train is to construct your again muscle tissue and to not
    practice your grip energy. Most individuals can do significantly more reps or use heavier
    weights in the event that they use lifting straps, which implies a greater coaching impact in your back muscles.

    I had a personal experience with this after I was going through
    bodily therapy, making an attempt to strengthen atrophied muscles in my left aspect that had been far weaker than my right aspect.
    I wasn't able to stroll on that left leg for a 12 months and
    a half, so the muscles had been undoubtedly lots weaker at the time.
    My quad muscular tissues would shake even attempting to balance and
    lower down on my left leg or carry out a simple heel tap on that one side.

    I even began quietly singing to myself the 1960s ‘Jump in the Line Shake, Senora’ calypso
    song by Lord Kitchener, whereas watching my quad muscle shake and attempting to steadiness.

    Thus, all horizontal back workout routines, together with the seated cable row, make your back thicker, wider, and stronger.
    Preserving your arms braced, you want to feel tension at all times and transfer by way of the total vary of motion with every rep.
    They assist to move those components of the body in addition to the arms and torso.

    Do Not crash the weights, and don't pause or bounce on the bottom of the raise.


    Cable rows can be used to construct power and
    size in your again muscle tissue as nicely as enhance posture.
    Lastly, there are several smaller stabilizing muscles which additionally get
    labored throughout cable rows. Posterior deltoids, which help
    us with extending our arms outwards from our bodies.

    The chest supported row is a good train for focusing on these muscle
    tissue. It’s an efficient compound motion that works a quantity of main muscle teams on the similar time –
    but what are the particular chest supported row muscle tissue worked?

    In this article we’ll discuss precisely which
    physique parts benefit from this exercise, as properly
    as its benefits and variations. We’ll additionally present various workout routines so you
    can get comparable results with out having to use a machine.

    As with any exercise, although, you have to use correct kind if you need
    to reap the benefits. Pay close attention to form and feel the actions
    and activations of your muscular tissues. As A Substitute of getting to shortly change
    plates you merely pull the pin out, select the next weight then go.
    The phases of a seated row contain set up, the pull, and the
    discharge. Right Here are some methods to alter your cable
    row to hit totally different muscle tissue. Heather Jacques is a
    former collegiate athlete that graduated from Grand Valley State College with
    a Bachelor of Science in Athletic Training.
    The distinction lies in how many stabilizing muscles are going
    to should be engaged. And whereas we’d never advocate for putting weight training on the again burner,
    the cable machine does give us one thing the dumbbells and barbells can't.
    The seated cable row is likely one of the finest
    actions you are able to do should you're aiming in course of
    growing a stronger again. It’s a functional movement that’ll help you out in on an everyday
    basis life whereas additionally serving to to forestall back strains and injuries.

Napísať komentár

Uistite sa, že všetky požadované (*) polia ste vyplnili. HTML kód nie je povolený.