
На отопление и охлаждение помещений во многих странах приходится значительная часть (особенно в связи с последним топливно-энергетическим кризисом) расходов за жилищно-коммунальные услуги. Понимая это, специалисты Китая и Германии из университетов Нанкина и Геттингена разработали новый материал — древесную пену, способную в какой-то степени заменить крайне энергозатратные кондиционеры, сохраняя тепло в доме в зимнее и прохладу в летнее время.
Материал представляет собой вспененный теплоизолятор из древесины, хорошо отражающий солнечный свет. К примеру, в летнее время излишки тепла оно «отправляет» в атмосферу. Основа уникального материала — нанокристаллы целлюлозы, которые позволяют отражать до 96 % солнечного света и излучать до 92 % поглощаемого инфракрасного излучения.
Для проверки охлаждающих свойств материала ученые поместили его в изолированную алюминиевой фольгой коробку и установили ее под прямыми солнечными лучами в полдень. В результате, внутри коробки температура оказалась ниже, чем снаружи на 9,2, а при высокой влажности — на 7,4 °C.
Если же покрыть древесной пеной все здание (за исключением крыши), то, по подсчетам исследователей, потребность в электроэнергии на отопление/охлаждение сократится примерно на 35 %.
В процессе изучения свойств древесной пены выяснилось, что по мере сжатия ее охлаждающие свойства уменьшаются. Однако и этот недостаток может стать достоинством — регулируя сжатие, можно «настраивать» свойства материала на соответствующую погоду. Благодаря своим практичным свойствам, он может стать родоначальником целой новой разновидности экологически чистых терморегулирующих материалов.

















































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We have found SERMs (selective estrogen receptor modulators) to be
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We sometimes see users achieve up to 30 kilos of weight on Anadrol, with strength ranges also soaring.
We typically see Superdrol being utilized by advanced steroid
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Apparently, Primobolan just isn’t C-17 alpha-alkylated,
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Many users have also reported major depressive symptoms and sleep issues – significantly in periods of abstinence after intense use 83, eighty four.
In reproductive goal tissues, testosterone may be thought-about to be a
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In different tissues, such as fatty tissue and elements of
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Moreover, possessing these Anabolic steroids without a proper prescription is towards the law and if
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These in flip trigger steroid or substance use disorder
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Thus, a natural method can be better and really helpful for increasing workout efficiency and power like correct exercising and following a
great food plan and diet schedule would enhance[12] sports performance.
Moreover, early exposure to steroids in teenagers may also affect brain well being and cause adjustments in sure brain areas
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Whereas some women decide to decrease their dosage gradually as they approach the end of the
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When contemplating what is the safest steroid, it’s crucial to look at both
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Human Progress Hormone (HGH) is a product that’s so frequent it’s not even used completely by athletes and bodybuilders.
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Trenbolone has an androgenic ranking of 500, indicating its potent nature
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Consumption of anabolic steroids could cause severe harm to
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