Influence of Moisture and Temperature on the Thermal Properties of Jack Bean Seeds (Canavalia ensiformis)

The thermal properties (specific heat capacity, thermal conductivity, and thermal diffusivity) of jack bean seed (Canavalia ensiformis) were determined for usage in designing the equipment necessary for thermal processes. These thermal properties were determined at 5, 10, 15, 20, and 25 % moisture contents (wb) and temperatures at 30, 40, and 50oC using the KD2 Pro thermal analyzer. Results showed that the specific heat capacity ranged from 1.55 to 2.47 kJ/kgK, 1.26 to 1.84 kJ/kgK and 1.32 to 1.99 kJ/kgK; thermal conductivity 0.21 to 0.47 W/mK, 0.34 to 0.52 W/mK, and 0.26 to 0.60 W/mK and thermal diffusivity 0.25 to 0.41 x 10-7 m²/s, 0.32 to 0.57 x 10-7 m²/s, and 0.32 to 0.60 x 10-7 m²/s at 30, 40, and 50°C respectively for the moisture ranges studied. The temperature and moisture content effect were not significant (p>0.05) with specific heat and thermal diffusivity but significant (p<0.05) with thermal conductivity in third-order polynomial. A non-linear relationship was established between the three thermal properties and moisture content within the studied temperature range. The resulting regression models for the thermal properties gave a high coefficient of determinations (R2 ≥ 0.7995) which implies that they can be used to describe the relationships between temperature, moisture, and thermal properties of jack bean seeds.

Teknologi Produksi Tanaman Koro Pedang [Canavalia ensiformis (L.)]

Koro pedang [Canavalia ensiformis (L.)] merupakan salah satu tanaman aneka kacang yang potensial dikembangkan sebagai komoditas agribisnis. Selain kandungan gizinya yang cukup tinggi, harga biji koro pedang cukup mahal dan juga sebagai komoditas ekspor. Untuk meningkatkan nilai sebagai komoditas agribisnis, maka produktivitas per satuan luas juga harus cukup tinggi. Sampai saat ini petani menggunakan benih dari tanaman koro pedang yang umum ditanam petani. Sehingga, teknologi budidaya berperan strategis untuk meningkatkan produktivitas. Dalam tulisan ini akan dibahas teknologi produksi berdasarkan pengalaman petani dan hasil penelitian terkini. Komponen teknologi budidaya yang akan dibahas meliputi penggunaan benih, pengolahan tanah, jarak tanam, pemupukan, pencegahan hama dan penyakit, penyiangan gulma dan pemangkasan, panen dan prosesing.

Optimasi Sintesis Hydroxypropyl Methyl Cellulose (HPMC) dari Kulit Koro Pedang Putih (Canavalia ensiformis L. (DC)

Kulit koro pedang putih dapat digunakan sebagai sumber selulosa. Salah satu alternatif untuk meningkatkan aplikasi selulosa adalah dengan memodifikasi selulosa menjadi produk turunan selulosa yaitu Hydroxypropyl Methyl Cellulose (HPMC). Tujuan dari penelitian ini adalah melakukan optimasi terhadap sintesis dan karkaterisasi HPMC dari selulosa kulit koro pedang putih. Proses optimasi didahului dengan kajian literatur untuk menentukan kisaran titik percobaan dengan variabel terikat berupa molar subtitusi (MS) dan Derajat Subtitusi (DS). Diperoleh titik percobaan dengan variasi konsentrasi NaOH (5, 22,5, dan 40%), variasi Dimetil Sulfat (DMS) (40, 80, dan 120%), dan variasi Proilen Oksida (PO) (80, 120, dan 160%). Kemudian optimasi sintesis HPMC dilakukan dengan mengunakan Box-Behnken design (BBD) lalu dianalisis menggunakan Response Surface Methodology (RSM) Berikutnya HPMC dikarakterisasi meliputi molar subtitusi (MS), Derajat Subtitusi (DS), water holding capacity (WHC), oil holding capacity (OHC), lightness, rendemen, kristalinitas dan spektra FT-IR untuk mengetahui gugus fungsi HPMC. Hasil optimasi sintesis HPMC dari selulosa kulit koro pedang putih berdasakan RSM diperoleh titik optimum pada konsentrasi NaOH 23,11%, DMS 43,4% dan PO 81,8%. dengan karakterisasi kadar air 9,04% (wb); MS 0,15; DS 1,18; WHC 2,20 g/g; OHC 2,09 g/g; lightness 90,93; rendemen 114,78% dan kristalinitas 64%. Spektra FT-IR HPMC koro pedang putih terbaca pada bilangan gelombang 2924 cm-1 (CH dan CH2 Streching), 1373 cm-1 (CH3 Bonding), 1118 cm-1 (C-O-C), 1319 cm-1 (O-H Plane Bonding) dan 848, 68 cm-1 (C-O-C pada 1,4 β glikosidic linkage) yang merupakan ciri khas dari gugus fungsional HPMC.

Karakteristik sifat Fisik Kimia dan Organoleptik Tiwul Instan Protein Tinggi Bersubtitusi Tepung Koro Pedang (Canavalia ensiformis L.)

Penelitian ini bertujuan untuk mengetahui pengaruh persentase subtitusi tepung koro pedang pada pembuatan tiwul instan protein tinggi terhadap karakteristik fisik, kimia dan organoleptik tiwul instan dan menentukan persentase subtitusi tepung koro pedang yang tepat sehingga dihasilkan tiwul instan yang disukai. Penelitian ini dilakukan dengan Rancangan Acak Lengkap (RAL) faktor tunggal, yaitu persentase subtitusi tepung koro pedang pada pembuatan tiwul instan dan setiap perlakuan dalam penelitian diulang 3 (tiga) kali. Data pengamatan yang didapatkan dianalisis menggunakan uji keragaman (ANOVA) taraf kepercayaan 95% (α≤0,05) dan apabila ada perbedaan yang nyata antar perlakuan (α≤0,05) dilanjutkan dengan uji beda Duncan. Data uji organoleptik dianalisis menggunakan uji chi-square (α≤0,05). Hasil penelitian ini menunjukkan, bahwa peningkatan persentase subtitusi tepung koro pedang menyebabkan peningkatan daya rehidrasi, daya kembang dan kadar protein tiwul instan protein tinggi, namun menyebabkan penurunan terhadap densitas kamba, kecerahan warna dan kadar air tiwul instan protein tinggi yang dihasilkan. Uji organoleptik kesukaan panelis didapatkan persentase tertinggi pada perlakuan P3 (persentase subtitusi tepung koro pedang 30% ) dengan atribut memiliki daya rehidrasi 347%, densitas kamba 0,51 g/mL, daya kembang 35,14%, kecerahan warna 69,87, kadar air 6,05%, dan kadar protein 8,15%, serta persentase kesukaan warna, aroma, rasa, tekstur, dan kekenyalan berturut turut 56, 40, 62, 68, dan 64%.

Lectinas antibacterianas e antibiofilmes de plantas - uma revisão

O número de bactérias multirresistentes que afetam a saúde pública tem aumentado e há recursos limitados de terapia para lidar com esses patógenos. A formação de biofilme por bactérias, torna a terapia ainda mais difícil. Nesse sentido, produtos naturais têm sido cada vez mais utilizados como fonte de novos antimicrobianos e as lectinas têm se destacado como uma opção promissora. Assim, este trabalho tem como objetivo fazer uma revisão sobre lectinas vegetais com propriedades antibacterianas e antibiofilme frente microrganismos patogênicos. Várias lectinas, extraídas de Punica granatum (PgTeL), Portulaca elatior (PeRol), Curcuma longa L. (CLA), Sterculia foetida L. (SfL), Apuleia leiocarpa (ApulSL), Schinus terebinthifolius (SteLL), Archidendron jiringa Nielsen (AjL) e Phthirusa pyrifolia (PpyLL), demonstraram atividade antibacteriana. Canavalia ensiformis (ConA), Calliandra surinamensis (Casul), Solanum tuberosum (StL-20), Canavalia marítima (ConM) demonstraram atividade antibiofilme. Além disso, lectinas de Alpinia purpurata (ApuL) e Moringa oleífera (WSMoL) demonstraram ambos os potenciais. Portanto, esta revisão reuniu evidências substanciais de que essas lectinas podem constituir alternativa terapêutica para o tratamento de infecções causadas por bactérias Gram-positivas e Gram-negativas multirresistentes e produtoras de biofilme no futuro.

Potential Importance of Molybdenum Priming to Metabolism and Nutritive Value of Canavalia spp. Sprouts

Molybdenum ions (Mo) can improve plants’ nutritional value primarily by enhancing nitrogenous metabolism. In this study, the comparative effects of seed priming using Mo were evaluated among sproutings of Canavalia species/cultivars, including Canavalia ensiformis var. gladiata (CA1), Canavalia ensiformis var. truncata Ricker (CA2), and Canavalia gladiata var. alba Hisauc (CA3). Mo impacts on growth, metabolism (e.g., nitrogen and phenolic metabolism, pigment and total nutrient profiles), and biological activities were assayed. Principal component analysis (PCA) was used to correlate Mo-mediated impacts. The results showed that Mo induced photosynthetic pigments that resulted in an improvement in growth and increased biomass. The N content was increased 0.3-fold in CA3 and 0.2-fold in CA1 and CA2. Enhanced nitrogen metabolism by Mo provided the precursors for amino acids, protein, and lipid biosynthesis. At the secondary metabolic level, phenolic metabolism-related precursors and enzyme activities were also differentially increased in Canavalia species/cultivars. The observed increase in metabolism resulted in the enhancement of the antioxidant (2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) free radical scavenging, 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), ferric reducing antioxidant power (FRAP)) and antidiabetic potential (Glycemic index (GI) and inhibition activity of α-amylase, and α-glucosidase) of species. The antioxidant activity increased 20% in CA3, 14% in CA1, and 8% in CA2. Furthermore, PCA showed significant variations not only between Mo-treated and untreated samples but also among Canavalia species. Overall, this study indicated that the sprouts of Canavalia species have tremendous potential for commercial usage due to their high nutritive value, which can be enhanced further with Mo treatment to accomplish the demand for nutritious feed.

The evaluation of protease enzyme effectivenes in broiler chicken diet containing jack bean seed (Canavalia ensiformis) with different protein level toward internal organ size

This study was conducted with the intention of evaluating the use of the protease enzyme in broiler feed containing jack bean seed (Canavalia ensiformis) with the different levels of protein towards the internal organs of broiler chicken starter. Bird samples used were 24 broilers of the male lohmann strain taken from 120 chickens. The study design used was a factorial completely randomized design (FCRD) with 2 factors treatment and 3 replications (each replication used 2 samples of bird). The first factor was the level of protein (CP 22% and CP 19.5%) and the second factor was the use of enzymes (non-protease and protease). Data were analyzed by using analysis of variance (ANOVA). The result showed that the use of low protein levels in broiler feed containing jack bean seed significantly (P <0.05) increased the percentage of pancreatic weights but could be improved by the use of protease enzymes. Levels of protein treatment did not significantly affect the percentage of heart, liver and bile weights. The use of protease enzymes significantly (P <0.05) decreased the percentage of pancreatic and bile weights but did not significantly affect the percentage of liver and heart weights.