is hb or 2h darker?
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H and 2H pencils are pencils with hard lead as compared to the B and 2B where it is bolder. Harder pencil leads means more fainter lines. Bolder pencil leads means more darker lines. The grades range from 6H, 4H and lower to HB and then higher to 4B and 6B.
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Hemoglobin, or Hb, is a protein molecule found in red blood cells (erythrocytes) made of four subunits: two alpha subunits and two beta subunits (Figure 20.19). Each subunit surrounds a central heme group that contains iron and binds one oxygen molecule, allowing each hemoglobin molecule to bind four oxygen molecules.
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You may see this color throughout your cycle, usually around the time of your regular menstrual period. When blood takes extra time to exit the uterus, it oxidizes. This can cause it to appear a shade of brown to dark brown or black in color.
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Once your baby's bilirubin is below a certain level, the phototherapy will be stopped. Another bilirubin level will be checked 12–18 hours later to make sure it hasn't risen again. Babies usually need to be under phototherapy lights for around 48 hours and often longer.
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If your baby looks jaundiced and is older than 24 hours, the doctor or midwife should measure your baby's bilirubin level within 6 hours. This can usually be done using a bilirubinometer. If a bilirubinometer is not available, bilirubin levels can be measured using a blood test.
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What does dark red period blood mean? You may see dark red blood upon waking during your period or after you've been lying down for a while. The deep color may simply mean that the blood has been sitting in the uterus for a while but hasn't oxidized to the point of turning brown.
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The pencil lead of 2B pencil is relatively soft, while the pencil lead of HB pencil is very hard, which is not easy to break. ... The usage of 2B pencil and HB pencil is also quite different. 2B pencil is darker in color and lower in hardness.
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Hemoglobin (American English) or haemoglobin (British English) (Greek αἷμα (haîma, “blood”) + -in) + -o- + globulin (from Latin globus (“ball, sphere”) + -in) (/ˈhiːməˌɡloʊbɪn, ˈhɛ-, -moʊ-/), abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein in the red blood cells (erythrocytes) of almost ...
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Arterial blood, therefore, appears a brighter red than deoxygenated venous blood. Red blood is oxigenated (meaning that it has oxygen bound to the red blood cell's haemoglobin protein) where dark red blood is deoxigenated (no oxygen and usually depicted as blue in textbook).
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Although today most pencils using the HB system are designated by a number such as 2B, 4B or 2H to indicate the degree of hardness. ... Generally, an HB grade about the middle of the scale is considered to be equivalent to a #2 pencil using the U.S. numbering system.
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Hepatitis B signs and symptoms may include: Abdominal pain. Dark urine. Fever.
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Clots can be bright in color, or a darker, deeper red. More sizeable clots may look black. Menstrual blood begins to appear darker and more brown toward the end of each period as the blood is older and leaving the body less quickly.
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It owes its color to hemoglobin, to which oxygen binds. Deoxygenated blood is darker due to the difference in shape of the red blood cell when oxygen binds to haemoglobin in the blood cell (oxygenated) versus does not bind to it (deoxygenated). Human blood is never blue.
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The 2B pencil has a higher blackness, and the marks drawn are relatively black, while the HB pencil has a lower blackness, and the color of the marks drawn is relatively light, which is very different. ... The usage of 2B pencil and HB pencil is also quite different. 2B pencil is darker in color and lower in hardness.
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Color. The color of human blood ranges from bright red when oxygenated to a darker red when deoxygenated. It owes its color to hemoglobin, to which oxygen binds.
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You may see dark red blood upon waking during your period or after you've been lying down for a while. The deep color may simply mean that the blood has been sitting in the uterus for a while but hasn't oxidized to the point of turning brown.
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Black, brown, or dark red period blood color At the beginning or end of your period, blood can be a dark brown/red shade and can have a thick consistency—but it's also normal for the first signs of your period to be bright red and more liquid.