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Related Concept Videos

Primary Active Transport01:47

Primary Active Transport

199.4K
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
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Primary Active Transport01:29

Primary Active Transport

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In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction they would...
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Primary and Secondary Growth in Roots and Shoots03:02

Primary and Secondary Growth in Roots and Shoots

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Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
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Primary Production01:06

Primary Production

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The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
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Primary Distribution01:28

Primary Distribution

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Primary distribution systems deliver electrical power from substations to consumers through various voltage classes, with 15-kV class voltages being predominant among U.S. utilities. Older 2.5- and 5-kV classes are being replaced by 15-kV primaries, while higher 25- to 34.5-kV classes are used in high-density urban areas and rural regions with long feeders. Three-phase, four-wire multigrounded systems are widely employed for balanced power delivery, using the neutral wire as a grounding point.
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Nomenclature of Primary Amines01:17

Nomenclature of Primary Amines

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Primary, secondary, and tertiary amines are compounds consisting of one, two, and three alkyl groups connected to the amino group (–NH2), respectively. As depicted in Figure 1, the common name of the primary amines is obtained by adding the suffix -amine to the alkyl substituent attached to the amino group as the corresponding alkylamine.
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Related Experiment Video

Updated: Feb 7, 2026

Intratibial Osteosarcoma Cell Injection to Generate Orthotopic Osteosarcoma and Lung Metastasis Mouse Models
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Primary testicular osteosarcoma.

Berkan Resorlu1, Kadir Onem1, Rustu Cankon Germiyanoglu1

  • 1Department of Urology, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey.

Urologia
|July 26, 2018
PubMed
Summary

Primary testicular osteosarcoma is an extremely rare cancer. This report details a case of a 63-year-old man successfully treated with surgery, remaining disease-free for 12 months.

Area of Science:

  • Oncology
  • Pathology

Background:

  • Primary testicular osteosarcoma is an exceptionally rare malignancy.
  • Only two previous cases are documented in medical literature.

Observation:

  • A 63-year-old male presented with a large, painless left inguinal and scrotal mass.
  • Radical orchiectomy was performed for diagnosis and treatment.

Findings:

  • Pathological examination confirmed the diagnosis of testicular osteosarcoma.
  • The patient received no adjuvant therapy post-surgery.

Implications:

  • This case adds to the limited understanding of testicular osteosarcoma.
  • Successful surgical management without adjuvant therapy suggests a potential treatment approach.
Keywords:
Osteosarcomaprimarytestis

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  • Further research is warranted to establish optimal treatment protocols for this rare tumor.