Influence Analysis Number of Blue and Red Light Emitting Diode (LED) Variation on Soybean (Glycine Max) Growth

Soybean (Glycine Max) is one of the agricultural commodities that still had particularly low production rate on a national scale in Indonesia. Despite the demand for the soybean it’s increasing along with the population growth in Indonesia. Thus, the need of soybean which mainly as main ingredient of tempe and tahu is still filled from importers. These problems can be solved by the research of applying artificial light technology in the agricultural sector so it would help optimize soybean growth. The purpose of this research is determines the effect of Blue Light and Red Light Emitting Diode (LED) lighting on the growth of soybean (Glycine max). Soybeans were grown in uniform boxes that had controlled temperature and humidity with regulated soybean seeds, soil, and planting methods. Based on the results from the research that had been conducted on the growth of the soybean, it is determined that most optimum soybean plant is using the lighting ratio of the red LEDs 75% and blue 25% with a height of 15 cm in the ninth day and the chlorophyll concentration is 52,4265953 mg/l. But plant with sun source lighting is better than using LED, it is about 118,8138334 mg/l. Based on the result that had been obtained, this research can be used as reference in the making of modern artificial light for soybean for research development in agriculture especially on soybean commodity which could support government efforts in suppressing important soybeans and meet domestic soybean demand using national production

Pengukuran Kadar Glukosa pada Jaringan Kulit Tiruan Padat menggunakan Teknik Reflektansi Difus dengan Spektroskopi Near Infrared

Berdasarkan fakta mengenai potensi penyakit diabetes yang terus meningkat, maka perlu adanya suatu metode untuk memantau gula darah secara kontinu yang dapat dilakukan dengan metode non-invasif dari pengukuran berbasis optik. Salah satunya ialah dengan menggunakan metode Diffuse Reflectance Spectroscopy (DRS). Penelitian ini bertujuan untuk menentukan kadar glukosa pada solid phantom jaringan kulit berdasarkan parameter optik berupa koefisien penyerapan (µ_a) yang didapatkan dari karakterisasi absorbansi bahan penyusun phantom dan koefisien penghamburan tereduksi (〖µ'〗_s) yang didapatkan dari fitting terhadap spektrum reflektansi difus phantom. Berdasarkan eksperimen menunjukkan bahwa pengukuran kadar glukosa telah berhasil dilakukan pada rentang panjang gelombang 900 – 1300 nm dengan bahan penyusun phantom adalah air dan agar-agar sebagai agen penyerap dan baseline, serta intralipid sebagai agen penghambur. Metode DRS ini dapat digunakan untuk mengukur konsentrasi glukosa berdasarkan parameter koefisien absorbansi dan diperoleh korelasi antara konsentrasi hasil fitting terhadap konsentrasi regresi eksperimennya dengan persamaan y = 0.83634 + 0.58036x dan koefisien determinasi (R2) bernilai 0.98739. Berdasarkan Clarke Error Grid Analysis menunjukkan bahwa sistem pengukuran glukosa yang dilakukan telah dapat mendeteksi hingga konsentrasi glukosa 18 mM pada pasien diabetes yang sesuai dengan uji klinis. ================================================================================================ Based on the fact of the diabetes patients tended to incline, so it needs a method for continuous blood glucose monitoring from the optical measurements. One of them is by using Diffuse Reflectance Spectroscopy (DRS) on the wavelength region of near infrared (NIR). This study aims to determine the glucose level on the solid phantom using the theory of diffuse equation based on the optical parameters of absorption coefficient (µ_a) obtained by absorption characterization of constituent materials of the phantom and based on the reduced scattering coefficient (〖µ'〗_s) obtained by fitting program of diffuse reflectance spectra of the phantom. The experiments show that the measurements of the glucose level on the solid phantom were succeed using diffuse reflectance technique with the near infrared spectroscopy on the wavelength of 900 – 1300 nm. The phantom consists of the water as the absorption agent, agar-agar as the baseline, and the intralipid as the scattering agent. This method can be used for measuring the glucose level based on its absorption coefficient and was obtained the correlation between fitting concentrations and regression of experiment concentrations with the equation of y = 0.83634 + 0.58036x and the determination coefficient (R2) of 0.98739. Based on the Clarke Error Grid Analysis shows that the glucose measurement system can detect the glucose level of diabetes patients up to 18 mM clinically appropriate