Tempuyung (Sonchus arvensis L.) is one of the herbs that the community has widely known. This plant is easy to come by and has excellent benefits. Therefore, it is necessary to obtain information about phytochemicals and their pharmacological effects. Information search is done by literature studies in primary data or official book forms and international journals through trusted websites such as Mendeley, Scopus, ScienceDirect, NCBI, ResearchGate, Google Scholar, Pubmed. The results showed tempuyung has phytochemical compounds, especially flavonoids and derivatives such as kaempferol, rutin, and quercetin. This compound is isolated from the leaves of tempuyung by various extraction methods. Pharmacologically, this plant has been reported to have antibacterial and antiviral, diuretic, kidney stones, antihistamine, antihypertensive, and antihyperuricemia. Thus, tempuyung can be used as an ingredient for traditional medicine, and further research needs to be done to isolate medicinal compounds from tempuyung.

Telah dilakukan penetapan kadar logam kalsium dan besi pada sampel daun kelor yang diperoleh dari daerah Purus, Kecamatan Padang Barat. Dalam penelitian ini proses destruksi yang digunakan adalah destruksi basah. Hasil dari destruksi ini selanjutnya diukur dengan spektrofotometer serapan atom menggunakan lampu katoda berongga Ca dan Fe sebagai sumber cahaya. Berdasarkan hasil penelitian didapatkan garis regresi linier dari larutan standar kalsium dengan persamaan y = 0,03818 + 0,17036x, dengan r = 0,9997, sedangkan untuk larutan standar besi didapatkan y = 0,03831 + 0,064275x, dengan r = 0,9986. Nilai batas deteksi (BD) dan batas kuantitasi (BK) dari kalsium yaitu 0,0678 mg/kg dan 0,2261 mg/kg, sedangkan nilai batas deteksi (BD) dan batas kuantitasi (BK) dari besi yaitu 0,5790 mg/kg dan 1,9292 mg/kg. Dari persamaan garis regresi linier tersebut diperoleh kadar kalsium dalam daun kelor dengan tiga kali pengulangan yaitu 1277,986 mg/kg, 1269,178 mg/kg, 1229,063 mg/kg sehingga rata-rata kandungan kalsium dalam daun kelor yaitu 1258,742 mg/kg. Sedangkan, hasil dari penetapan kadar besi dalam daun kelor dengan tiga kali pengulangan yaitu 210,509 mg/kg, 198,985 mg/kg, 206,117 mg/kg sehingga rata-rata kandungan besi dalam daun kelor yaitu 205,204 mg/kg

Histological staining is one the technical processes in the preparation of tissue samples by coloring using histological staining to assist in the study. Natural dyes as an alternative solution to replace synthetic dyes because it can affect human health such as skin allergies, digestive system and respiratory system. This review article aims to determine the quality of natural dyes used to color tissue in the process of making animal and plant tissue preparations. Some of the plants used as natural dyes, coloring indicates a change in tissue preparations. From some plants used for natural dyes in the histology of animal and plant tissues, chemical compounds contained there in that can provide colors such as flavonoids, alkaloids, saponins, tannins, anthocyanins, betasianins, and curcuminoids. The resulting dye looked good or not is influenced by the pH, concentration, staining time, method and solvent used in the staining.