scholarly journals Relación Entre Biomasa Aérea Y Producción Primaria Neta Con Las Variaciones Estacionales De Precipitaciones Y Temperaturas En Pastizales Del Sur De La Provincia De Córdoba

2017 ◽  
Vol 13 (5) ◽  
pp. 117
Author(s):  
Cerutti, A., N. Mónaco ◽  
M. J. Rosa y V. Santa.
Keyword(s):  
Fixed Effects ◽  
Net Primary Productivity ◽  
Ground Level ◽  
Constant Weight ◽  
A Value ◽  
Natural Pasture ◽  
Randomized Design ◽  
Natural Grasslands ◽  
Completely Randomized Design ◽  
The Town

Natural grasslands of the planet are very important reservoirs of flora and fauna that provide various ecosystem services benefits. To maintain and improve their condition, it is necessary to study them and understand their composition and functioning as well as their evolution over time. In the present work the influence of climatic variables, temperature and rainfall on the aerial biomass behavior and the net primary productivity of a pasture were analyzed. For this purpose, a natural pasture was located on the banks of the Chocancharava River, in the town of Río Cuarto. Monthly sampling (September 2014 - August 2015) was carried out, cutting aerial biomass at ground level with tusar scissors and collecting biomass and mulch in 10 quadrants of 0.5 x 0.5 m (0.25 m2) and dried in stove to constant weight. This material was separated into compartments: green (BV), dry (BS) and mulch (BM) to determined the available biomass. For statistical analysis, a completely randomized design (DCA) of fixed effects with Infostat program was used. The highest contribution of BV was in summer months, 4262 kg / ha of 8772 kg / ha corresponding to the total cycle. The highest BS was determined in winter with 2715 kg / ha of the total 6663 kg / ha. The litter presented a behavior similar to the BV, with the highest peaks in summer months 2478 kg / ha of 6004 kg / ha. The PPN presented a marked spring increase. Adding the positive increases in monthly PPN, a value of 1206.6 kg / ha * year was determined. Considering that higher temperatures and rainfall are recorded in summer (average 22 ° C and 422 mm), it could be assert that these variables would explain a significant part of the variability in the total aerial biomass production of the pasture.

scholarly journals Effect of drying and/or warming piglets at birth under warm farrowing room temperatures on piglet rectal temperature over the first 24 h after birth

2021 ◽  
Author(s):  
Katherine D Vande Pol ◽  
Andres F Tolosa ◽  
Caleb M Shull ◽  
Catherine B Brown ◽  
Stephan A S Alencar ◽  
...  
Keyword(s):  
Birth Weight ◽  
Birth Control ◽  
Rectal Temperature ◽  
Fixed Effects ◽  
Random Effect ◽  
Repeated Measure ◽  
Experimental Unit ◽  
Concentration Data ◽  
Randomized Design ◽  
Completely Randomized Design

Abstract Piglets experience a decline in body temperature immediately after birth, and both drying and warming piglets at birth reduces this. However, these interventions may have less effective at higher farrowing room temperatures. This study was carried out at a commercial facility to compare the effect of drying and/or warming piglets at birth on postnatal rectal temperature (RT) under relatively warm farrowing room temperatures (26.6 ± 2.09°C). Forty-five sows/litters were used in a completely randomized design to compare three Intervention Treatments (applied at birth): Control (no treatment); Warming (piglets placed in a plastic box under a heat lamp for 30 min); Drying+Warming (piglets dried with desiccant and warmed as above). Temperatures in the warming boxes over the study period averaged 37.7 ± 2.75°C. At birth, piglets were weighed; RT temperature was measured at 0, 10, 20, 30, 45, 60, 120, and 1440 min after birth. Blood samples were collected at 24 h after birth from a subsample of one piglet from each birth weight quartile within each litter to measure plasma immunocrit concentration. Data were analyzed using PROC MIXED of SAS with litter as the experimental unit; and piglet a subsample of litter. The model for analysis of piglet rectal temperature included fixed effects of treatment, measurement time (repeated measure), the interaction, and the random effect of sow. Compared to the Control, piglet RT were higher (P ≤ 0.05) for the Warming treatment between 10 and 60 min, and higher (P ≤ 0.05) for the Drying+Warming treatment between 10 and 120 min after birth. Rectal temperatures were higher (P ≤ 0.05) for the Drying+Warming than the Warming treatment between 20 and 120 min. Responses to drying and/or warming were greater for low birth weight piglets (< 1.0 kg) than heavier littermates, but were generally less than observed in previous experiments with similar treatments carried out under cooler temperatures. Piglet immunocrit values were lower (P ≤ 0.05) for the Drying+Warming treatment compared to the other treatments, which were similar (P > 0.05). Immunocrit values tended (P = 0.10) to be lower for light (< 1.0 kg) compared to heavier birth weight piglets. In conclusion, drying and warming piglets at birth was more effective for reducing piglet RT decline after birth than warming alone, though the effect was less than observed in previous studies carried out under cooler farrowing room temperatures.

scholarly journals PEMANFAATAN BIJI KETAPANG (Terminalia catappa) SEBAGAI SUMBER PROTEIN DAN SERAT PADA PRODUK MAKANAN STIK

2019 ◽  
Vol 1 (1) ◽  
pp. 27-33
Author(s):  
Eman Darmawan
Keyword(s):  
Water Content ◽  
Wheat Flour ◽  
Test Method ◽  
Snack Food ◽  
Organoleptic Properties ◽  
Seed Flour ◽  
A Value ◽  
Randomized Design ◽  
Yellow Color ◽  
Completely Randomized Design

The purpose of this study was to determine the effect of substitution ketapan seed to chemical and organoleptic properties of  the resulted snack food, knowing the exact level of substitution, so obtain the snack food liked the panelists. The design used in this study was completely randomized design (CRD) with single factor that influences the concentration of seed flour substitution ketapan seed consisting of 5 treatments. Each treatment be repeated 3 times. The data obtained was analyzed by Analysis of Variance (ANOVA), if there was a difference between the treatment of advanced test conducted by Duncan`s Multiple Ranges Test Method (DMRT) at the level of 5%. Substitution of wheat flour with ketapan seed flour  affects the snack food produced, which can reduce the water content of the snack food and increase levels of protein and fiber snack food. Ketapan seed flour substitution preferred by the panelists was substitution ketapan seed flour up to 30% with a value of 3.52 and the criteria snack food produced had a water content of 3.67%, 15.10% db protein content, fiber content of 3.64 % db, brownish yellow color (2.95), a rather tasted wheat flour (3.35), and crispy (3.60).

scholarly journals EKSTRAK KARAGINAN RUMPUT LAUT (Eucheuma cottonii) YANG DIPEROLEH DARI PANTAI TABLOLONG

2021 ◽  
Vol 3 (3) ◽  
pp. 119-127
Author(s):  
Runa Matias Ruku ◽  
Alfred G.O Kase ◽  
Hartini R.L Solle
Keyword(s):  
Fat Content ◽  
Ash Content ◽  
Test Results ◽  
A Value ◽  
Randomized Design ◽  
Yield Test ◽  
Completely Randomized Design ◽  
Quantitative Descriptive ◽  
Treatment Concentration

ABSTRACTEucheuma cottonii (E. cottonii) seaweed is a low level plant that has a high nutritional value. One of the ingredients that play a role in the formation of texture is carrageenan.Carrageenan is a type of hydrocolloid extracted from the seaweed of the red algae group (Rhodophyceae). The purpose of this study was to determine the quality of yields of Seaweed Carrageenan Extract (E. cottonii) obtained from Tablolong beach in the form of yield, ash content and fat content. The method used in this study is an experimental method with a completely randomized design (CRD) and for fat testing using quantitative descriptive methods. This study uses various concentrations of 0.1 N KOH, 0.2 N KOH, 0.3 N KOH and 0.4 N KOH. The results of the carrageenan yield test show that the addition of 0.1 N KOH concentration has a value of 56.10, KOH 0 , 2 N 62.16, KOH 0.3 N 72.73 and the best treatment was at P4 KOH 0.4 N 80.90. Carrageenan ash content test results showed that the addition of KOH concentration value obtained P1 KOH 0.1 N was 60.50, P2 KOH 0.2 N was 70.70, P3 KOH 0.3 N was 80.50, and P4 KOH 0.4 with a value of 90.50. The results of the carrageenan fat content of 0.1 KOH treatment has a fat content of 0, 2 while the treatment of KOH 0,2, KOH 0,3, KOH 0,4 have no fat content by showing the value (0). The results showed that the highest yield in the treatment of KOH concentration of 0.4 N with a value 80.95% and carrageenan ash content has the highest value in the treatment concentration of 0.4 N with a value of 90.50% while the fat content has a value of 0.2 in the treatment of KOH concentration of 0.1 N Keywords: Carrageenan, extract of E. cottonii seaweed.

scholarly journals PENGARUH LAMA PENGERINGAN TERHADAP KARAKTERISTIK KIMIA DAN ORGANOLEPTIK DENDENG IKAN TERI (Stolephorus sp.)

2019 ◽  
Vol 2 (2) ◽  
pp. 202
Author(s):  
Dariyani Dariyani ◽  
Kobajashi Togo Isamu ◽  
Suwarjoyowirayatno Suwarjoyowirayatno
Keyword(s):  
Water Content ◽  
Proximate Analysis ◽  
Chemical Parameters ◽  
Drying Time ◽  
Organoleptic Test ◽  
A Value ◽  
Organoleptic Characteristics ◽  
Randomized Design ◽  
Completely Randomized Design

ABSTRACT          The aim of this study was to determine the effect of drying time on the chemical and organoleptic characteristics of anchovy (Stolephorus sp.). This study used a Completely Randomized Design (CRD) consisting of three treatments, with three-time replication  P1 (6 hours, 65oC), P2 ( 7 hours, 65oC), P3 and (8 hours, 65oC). The results showed that the drying time of the organoleptic value has a very significant effect on color with the highest value of 8.04, and a very significant effect on the aroma with a value of 8.05, and no significant effect on taste and texture with the highest values of 7.47 and 7.79. Chemical parameters observed on have a very significant effect on water content, ash, protein and fat with values of 12.6%, 9.1%, 43.6%, and 12.3%, respectively. Keywords: Anchovy, Organoleptic Test, Proximate analysis and drying time.ABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh lama pengeringan terhadap karakteristik kimia dan organoleptik dendeng ikan teri (Stolephorus sp.). Penelitian ini menggunakan Rancangan Acak Lengkap (RAL)  yang terdiri dari 3 perlakuan lama pengeringan yang berbeda yaitu P1 (6 jam, 65°C), P2 (7 jam, 65°C), P3 dan (8 jam, 65°C). Hasil penelitian ini menunjukan bahwa lama pengeringan terhadap nilai organoleptik yang diamati berpengaruh sangat nyata terhadap warna dengan nilai tertinggi 8,04, dan berpengaruh sangat nyata terhadap aroma dengan nilai 8,05, serta tidak berpengaruh nyata terhadap rasa dan tekstur dengan nilai tertinggi 7,47, dan 7,79. Lama pengeringan terhadap parameter kimia yang diamati terhadap nilai kadar air, kadar abu, kadar protein dan kadar lemak berpengaruh sangat nyata dengan nilai tertinggi 12,6%, 9,1%, 43,6% dan 12,3%.Kata kunci: Ikan Teri, Uji organoleptik, Uji Proksimat dan Waktu Pengeringan.

scholarly journals PENGARUH PENAMBAHAN DAGING GURITA (Octopus cyanea) TERHADAP NILAI ORGANOLEPTIK DAN KANDUNGAN PROKSIMAT STIK GURITA

2019 ◽  
Vol 2 (1) ◽  
pp. 18
Author(s):  
Yani Yani ◽  
Moh Nuh Ibrahim ◽  
Suwarjoyowirayatno Suwarjoyowirayatno
Keyword(s):  
Analysis Of Variance ◽  
Observation Data ◽  
Test Results ◽  
Duncan Multiple Range Test ◽  
Anova Analysis ◽  
A Value ◽  
Randomized Design ◽  
Aoac Method ◽  
Completely Randomized Design ◽  
Range Test

AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh penambahan daging gurita terhadap nilai organoleptik, proksimat stik gurita. Metode penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari tiga perlakuan yaitu P1 (Daging gurita 35%), P2 (Daging gurita 45%), P3 (Daging gurita 55%). Data hasil pengamatan dianalisa menggunakan ANOVA (Analysis of Variance) pada taraf 95%, apabila terdapat beda nyata (p>0,05) maka dilakukan uji lanjut dengan uji DMRT (Duncam Multiple Range Test) pada taraf nyata 95%. Kandungan protein dan lemak diuji menggunakan metode AOAC dan kandungan karbohidrat di uji menggunakan metode nelson-smogiy. Hasil uji kandungan kadar lemak dan karbohidrat tertinggi terdapat pada perlakuan P1 dengan nilai 34,27% dan 7,81% dan Kandungan protein tertinggi pada perlakuan P3 dengan nilai 32,04%. Hasil penelitian ini menunjukan bahwa terdapat pengaruh nyata terhadap kandungan lemak dan karbohidrat serta tidak terdapat pengaruh nyata pada kandungan air dan protein pada stik gurita. Kata kunci: Daging gurita (Octopus cyanea), stik gurita, kandungan proksimat, uji organoleptik  AbstractThis study aims to determine the effect Octopus cyanea addition on organoleptic values and proximate content of octopus sticks. This research method used a completely randomized design (CRD) consisting of three treatments P1 (35% octopus meat), P2 (45% octopus meat), P3 (55% octopus meat). Observation data were analyzed using ANOVA (Analysis of Variance) at the level 95%, if there were significant differences (p>0,05) then further testing was carried out with DMRT (Duncan Multiple Range Test) at 95%. The content of protein and fat was tested by the AOAC method and the carbohydrate content was tested by the nelson-smogiy method. The highest test results for the content of  fat and carbohydrate were found in treatment P1 with a value of 34.27% and 7.81% and the highest protein content found in treatment P3 with a value of 32.04%. The results of this study indicated that there is a real effect on the content of fat and carbohydrates and there is no significant effect on the water content and protein of octopus sticks. Key words: Octopus cyanea, octopus stick, proximate content, organoleptic value

scholarly journals The Effect of Combination of Tubifex sp and Artificial Feed on the Growth and Molting of Giant Shrimp (Macrobrachium Rosenbergii) Stadia V.

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Dianita Wijayanti ◽  
Ganjar Adhywirawan Sutarjo ◽  
Riza Rahman Hakim
Keyword(s):  
Water Quality ◽  
Economic Value ◽  
Macrobrachium Rosenbergii ◽  
Artificial Feeding ◽  
Freshwater Prawn ◽  
Diversity Analysis ◽  
Weight Growth ◽  
A Value ◽  
Randomized Design ◽  
Completely Randomized Design

Giant Prawns (Macrobrachium rosenbergii) or freshwater prawn is also one of the crustaceans, which has the largest size compared to other freshwater prawns, in addition to giant prawns have a high economic value. The obstacle to the giant prawn's cultivation is determining the combination of natural and artificial feeding for giant prawns to improve molting quickly and increasing the growth of giant prawns. The method used was the experimental method, Completely Randomized Design (RAL) with five treatments: P1 (100 % Pellet), P2 (25 % Tubifex + 75 % Pellet), P3 (75 % Tubifex + 25 % Pellet), P5 (100 % Tubifex) and 3 replications. The data were analyzed using diversity analysis (ANOVA), and if there were differences it could be continued with the BNT test. The results showed that The Influence of Tubifex sp and Natural Feeding Percentage And Artificial Feeding On Moulting Acceleration And Growing Giant Prawns/Crawfish (Macrobrachium Rosenbergii) Stadia V greatly influenced the molting of giant prawns. The water quality during the study ranged from 23˚C-29˚C, dissolved oxygen 3,6-8,7 mg/l, and pH ranged from 7.3 to 8.9. The conclusions from the 30-days of study obtained the highest results for molting on the second treatment (P2) was 0.43, while the fourth treatment (P4) was the best combination in weight growth with a value 6390,42 mg, and long growth showed that the fourth treatment (P4) also gave the highest result which is 406.75 mg.

PEMANFAATAN TEPUNG KOMPOSIT PISANG GOROHO (Musa acuminate) DAN UBI JALAR KUNING (Ipomoea batatas. L) SEBAGAI BAHAN BAKU PEMBUATAN CRUST PIE

2020 ◽  
Vol 10 (2) ◽  
Author(s):  
Nizar Ria ◽  
Dekie Rawung ◽  
Erny J. N. Nurali
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Sensory Quality ◽  
Ash Content ◽  
Composite Flour ◽  
A Value ◽  
Randomized Design ◽  
Sweet Potato Flour ◽  
Completely Randomized Design

AbstractThe objectives of this study were to analyze the composition and sensory quality of the crust pie made of composite flour of goroho and yellow sweet potato. This study was conducted in a completely randomized design with 4 different composition ratio of goroho plantain flour to yellow sweet potato flour, i.e., A (80% : 20%), B (70%: 30%), C (60%: 40%), and D (50% : 50%). The results of the study showed that the chemical composition of pie crust were in a range of 2.87% - 4.74% for moisture content, 2.66% - 2.72% for ash content, 32.10% - 32.95% for fat content, 5.90% - 6.06% for protein content, 3.76% - 4.77% for crude fiber, and 50.04% - 55.50% for carbohydrates content. The pie crust made from composite flour 50% goroho : 50% yellow sweet potato was the most preferred by panelists in terms of color, aroma, taste and texture with a value of 3.89 (like).Keywords: pie crust, composite flour, goroho plantain, sweet potato

scholarly journals Optimasi Produksi Virgin Coconut Oil dengan Metode Direct Micro Expelling [Production Optimization of Virgin Coconut Oil by Direct Micro Expelling Method]

Buletin Palma ◽  
2019 ◽  
Vol 20 (2) ◽  
pp. 91
Author(s):  
Adhitya Yudha Pradhana ◽  
Ismail Maskromo ◽  
Nugroho Utomo ◽  
Engelbert Manaroinsong ◽  
Steivie Karouw ◽  
...  
Keyword(s):  
Water Content ◽  
Coconut Oil ◽  
Production Optimization ◽  
Processing Unit ◽  
Virgin Coconut Oil ◽  
Quality Requirements ◽  
A Value ◽  
Randomized Design ◽  
Completely Randomized Design

<p>Virgin Coconut Oil (VCO) production with dry extraction oils such as copra is time consuming and resulting in quality. The purpose of this study was to optimize the production of VCO using the Direct Micro Expelling-Flat Bed Dried (DME-FBD) method. This research was carried out at the Indonesian Palm Crops Research Institute (IPCRI) on January - March 2019 in the coconut processing unit of the postharvest laboratory using two coconut varieties, namely Mapanget Tall (MTT) and Salak Green Dwarf (SGD), each with 10, 11, and 12 months harvest period. The experimental design used a Completely Randomized Design (CRD) with 3 repetition. The results showed that the yield of VCO oil from coconut 11 months old of MTT was 18.39% (16 nuts/L VCO) with optimum DME-FBD temperature of approximately 40-88°C on plate and 36–72°C on grated coconut meat. VCO obtained from MTT coconut has a quality of 0.07% water content, free fatty acid 0,0017%, fresh aroma coconut, non-rancid with a value of 4.50, a distinctive of coconut oil taste of 4.10, and clear color of 4.30 accordingly with SNI 7381: 2008 and export quality requirements of APCC. Almost the same quality was obtained from SGD coconut with 11 months of harvest with a water content of 0.06%, free fatty acids 0.0018%, a fresh aroma of coconut with a value of 4.30, a distinctive of coconut oil taste of 4.00, and clear color 4.10.</p><p align="center"><strong>ABSTRAK</strong></p><p>Produksi Virgin Coconut Oil (VCO) dengan ekstraksi kering seperti kopra membutuhkan waktu lama dan metode yang digunakan kurang optimal. Tujuan penelitian adalah untuk melakukan optimasi produksi VCO dengan menggunakan metode <em>Direct Micro Expelling-Flat Bed Dried </em>(DME-FBD). Penelitian dilakukan pada bulan Januari-Maret 2019 di unit pengolahan kelapa laboratorium pascapanen, Balai Penelitian Tanaman Palma menggunakan dua varietas kelapa, yaitu kelapa Dalam Mapanget (DMT) dan kelapa Genjah Salak (GSK), masing-masing dengan umur panen 10, 11, dan 12 bulan. Rancangan percobaan menggunakan Rancangan Acak Lengkap (RAL) dengan 3 ulangan. Hasil penelitian menunjukkan rendemen minyak VCO tertinggi dari kelapa DMT umur 11 bulan, sebesar 18,39% (16 butir/L VCO) dengan suhu optimum sekitar 40-88°C di pelat dan 35-72°C pada kelapa parut, sedangkan rendemen VCO kelapa GSK umur 11 bulan sebesar 16,38%, tetapi dengan jumlah buah 26 butir untuk mendapatkan 1 liter VCO, dengan suhu optimum sekitar 42-94°C di pelat dan 36-72°C pada kelapa parut. VCO yang diperoleh dari kelapa DMT mempunyai kualitas kadar air 0,07%, asam lemak bebas 0,0017%, aroma khas kelapa segar, tidak tengik dengan nilai 4,50, rasa normal, khas minyak kelapa 4,10, dan warna jernih 4,30 yang sesuai dengan SNI 7381:2008 dan syarat mutu ekspor APCC. Kualitas yang hampir sama diperoleh dari kelapa GSK dengan umur panen 11 bulan dihasilkan kadar air 0,06%, asam lemak bebas 0,0018%, aroma segar khas kelapa, tidak tengik dengan nilai 4,30, rasa khas minyak kelapa 4,00, dan warna jernih 4,10.</p><p> </p>

scholarly journals “SUBSTITUSI TEPUNG Cucurbita moschata (Duch.) Poir TERHADAP KADAR β-KAROTEN DAN DAYA TERIMA CAKE LABU KUNING”

2021 ◽  
Vol 4 (1) ◽  
pp. 7-15
Author(s):  
Frederika Pellu Dimu ◽  
Andriani Rafael ◽  
Sonya T.M Nge
Keyword(s):  
Cucurbita Moschata ◽  
Test Results ◽  
Alternative Source ◽  
Carotene Content ◽  
Tukey Test ◽  
A Value ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Collection Methods ◽  
Β Carotene

ABSTRACTPumpkin (Cucurbita moschata (Duch.) Poir ) is one of the vegetables that is rich in β-carotene as a precursor of vitamin A and has a fairly high carbohydrate content. Pumpkin processing can be done to produce various kinds of products, one of which is cake. Cake is a baked dough and liquid dough made from flour, sugar, salt, ingredients, shortening, milk, eggs, and aroma enhancer. This study aims to determine the levels of β-carotene contained in pumpkin cake and to determine the acceptability of β-carotene in pumpkin cake. This research is an experimental research. The experimental design used was Completely Randomized Design (CRD) with 1 control 4 treatments and each treatment was repeated 3 times. The research phase consisted of making flour and making cake. Data collection methods include organoleptic tests and β-carotene tests. Data were analyzed using analysis of variance / ANOVA to determine differences in quality, and if there is an influence then proceed with the Tukey test. Organoleptic test results show that the best treatment of pumpkin cake in terms of color is A1 with a value of 3.88, in terms of aroma namely A0 with a value of 3.92, in terms of texture is A0 with a value of 4.28 and in terms of taste is A0 with value of 4.16. As for the β-carotene test, the treatment of pumpkin cake with the highest β-carotene content was found in A4 with an average of 0.262 and the lowest level was in A0 with an average of 0.018. Based on research data, pumpkin flour is worthy of being used as an alternative source of flour because the resulting cake meets SNI quality standards both in terms of color, taste, aroma, texture and β-carotene content.Keywords : Cake, Pumpkin, β-Carotene, Organoleptic

scholarly journals The Physical and Chemical Characteristics of Potato Doughnuts Using Semi-Liquid Local Yeast Derived from Myrrh of Red Fermented Palm Sap

2021 ◽  
Vol 3 (2) ◽  
pp. 64-71
Author(s):  
Regina Ilse Marcelina BanoEt
Keyword(s):  
Wheat Flour ◽  
Fermentation Process ◽  
Carbon Dioxide Gas ◽  
A Value ◽  
Randomized Design ◽  
Gelatinized Starch ◽  
Commercial Yeast ◽  
Completely Randomized Design ◽  
Physical And Chemical

               Natural or local yeasts are microorganisms from natural ingredients obtained from fermentation without the need for artificial additives. The objectives of the present study were 1.) to evaluate the physical quality of potato doughnuts produced from the local yeast derived from residue of red fermented palm sap, 2) to obtain the best treatment from the use of local yeast in making doughnuts. In the fermentation process, yeast converts sugar and carbohydrates in the dough into carbon dioxide gas (CO2) and alcohol. Doughnuts are made from wheat flour, but the addition of potato paste can improve the texture so that it is softer and tender due to the interaction between gelatinized starch and gluten but can reduce its swelling power.             The experiment was designed using a completely randomized design (CRD) with three treatments and five replications to produce 15 experimental units. The treatments were a) Control (commercial yeast); b) Wheat flour: potato paste: local yeast; 2:1:1; c) Wheat flour: potato paste: local yeast; 2:1:2 and d) Wheat flour: potato paste: local yeast; 2:1:3. The results showed that the best treatment formula was obtained in the treatment B (wheat flour: potato paste: local yeast; 2:1:1) with 20,6% moisture content,  2,09% protein content and 3,644 color value (very like), 3,800 taste value (very like) and texture/tenderness with a value of 1032,500.

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